Barry I. Rosenblum, DPM, FACFAS

• Assistant Clinical Professor, Surgery
• Harvard Medical School
• Director of Podiatric Surgical Residency
• Beth Israel Deaconess Medical Center
• Boston, Massachusetts

What rheumatic disorders have been associated with pouchitis antibiotic 10 discount 500 mg keflex free shipping, lymphocytic colitis antibiotic ointment for burns keflex 500mg overnight delivery, and collagenous colitis? Patients present with watery diarrhea and may develop arthritic manifestations (10% to 20%) or autoimmune thyroiditis virus contagious generic keflex 500mg with amex. Whereas the upper gastrointestinal tract is normally exposed to 103 mucosa-adhering bacteria antibiotics for sinus infection nhs discount keflex 250 mg online, the lower gastrointestinal tract is constantly in contact with millions of bacteria (up to 1012/g of feces) antibiotic breastfeeding cheap 500 mg keflex. The total number of bacterial cells called the human microbiota that we are exposed to is 10 times that of the number of cells of the body antibiotic resistance can we ever win cheap keflex 750 mg with mastercard. This increased permeability may allow nonviable bacterial antigens in the gut lumen to enter the circulation more easily. These microbial antigens could either deposit directly in the joint synovia, leading to a local inflammatory reaction, or cause a systemic immune response, resulting in immune complexes that then deposit in joints and other tissues. Genetic susceptibility is required to develop the immunologic response in the gut and joint, which results in persistent inflammation and tissue injury. What rheumatic manifestations have been described in patients with celiac disease (glutensensitive enteropathy)? Some of these patients are mistakenly diagnosed as fibromyalgia with irritable bowel syndrome. Celiac disease is an enteropathy resulting from an autoimmune reaction to wheat gluten/gliadin by T lymphocytes in the gut in genetically predisposed individuals. It is a relatively common disease (1:300) in white individuals and can occur at any age. Dietary gluten is partly digested by gastric enzymes to form a 33-amino acid peptide that is deaminated by tissue transglutaminase increasing its immunogenicity. Only 66% have characteristic bowel symptoms, whereas others will present with arthritis, vitamin D or vitamin B12 deficiency, iron deficiency anemia, cerebellar disease, infertility, or peripheral neuropathy. However, autoantibody testing is very helpful in screening individuals before biopsy. On a gluten-rich diet in people who are not immunoglobulin A (IgA)-deficient, IgA antibodies against tissue transglutaminase have a high sensitivity (95%) and specificity (90%) for celiac disease. Owing to poor specificity, antigliadin antibodies are no longer used to screen for celiac disease. In the past, this syndrome occurred in 20% to 80% of patients who have undergone intestinal bypass (jejunoileal or jejunocolic) surgery for morbid obesity. Owing to the frequency of this complication, this type of obesity surgery has been abandoned. Today it can occur as a rare consequence of bacterial overgrowth in patients with poor intestinal peristalsis (systemic sclerosis, colorectal surgery) or diverticular disease. The arthritis is intensely painful, inflammatory, oligoarticular, and frequently migratory, affecting both upper and lower extremity small and large joints. Radiographs usually remain normal despite 25% of patients having chronic recurring episodes of arthritis. Up to 80% develop dermatologic abnormalities, the most characteristic of which is a maculopapular or vesiculopustular rash. The pathogenesis involves bacterial overgrowth in a blind loop resulting in antigenic stimulation causing immune complex formation (frequently cryoprecipitates containing bacterial antigens, secretory IgA, and complement) in the serum that deposit in the joints and skin. Only surgical reanastomosis of the blind loop can result in complete elimination of symptoms. What are the clinical features of the pancreatic, panniculitis, and polyarthritis syndrome? Synovial fluid is typically noninflammatory and creamy in color due to lipid droplets that stain with Sudan black or oil red O. These are frequently misdiagnosed as erythema nodosum but are areas of lobular (not septal) panniculitis with fat necrosis. C-Cancer of the pancreas more commonly causes this syndrome than does pancreatitis. R-Radiographic abnormalities due to osteolytic bone lesions from bone marrow necrosis (10%). A-Amylase, lipase, and trypsin are elevated due to release by a diseased pancreas and cause the fat necrosis in skin, synovium, and bone marrow. It can occur in all age groups (bimodal peak: 10 to 20 years, 45 to 70 years), but most patients are young and predominantly female (70%). Anti-Sm antibodies are antibodies against the Smith antigen, which is an epitope on small nuclear ribonuclear proteins. The most specific antimitochondrial antibody is the M2 antibody directed against the E2 subunit of the pyruvate dehydrogenase complex on the inner mitochondrial membrane. What dose adjustments need to be made for antirheumatic medications in patients with severe hepatobiliary disease? Severe liver disease can be defined as a combination of one or more of the following factors: elevated bilirubin >3 mg/dL, albumin <3 g/dL with ascites, elevated protime not fully corrected by vitamin K, and/or cirrhosis on liver biopsy. Elevated transaminases greater than three times the upper limit of normal should also be a concern. Also, note that because creatine is synthesized in the liver, serum creatinine may be an overestimate of renal function. Hepatobiliary disease may substantially impair the elimination or activation of drugs that the liver metabolizes or excretes. In addition, decreased synthesis of albumin may lead to increased free fraction of the active drug. Decreased synthesis of vitamin K-dependent clotting factors may lead to increased risk of bleeding if a medication affects platelet function or number. The following are guidelines for antirheumatic drug therapy in severe liver disease: · Prodrug metabolism-azathioprine, leflunomide, cyclophosphamide, prednisone, and sulindac need to be converted to active moiety by the liver. Would avoid or use tocilizumab and tofacitinib with caution because they can have liver toxicity. BiBliography Balbir-Gurman A, Schapira D, Nahir M: Arthritis related to ileal pouchitis following total proctocolectomy for ulcerative colitis, Semin Arthritis Rheum 30:242­248, 2001. Delco F, Tchambaz L, Schlienger R, et al: Dose adjustment in patients with liver disease, Drug Safety 28:529­545, 2005. Holden W, Orchard T, Wordsworth P: Enteropathic arthritis, Rheum Dis Clin N Am 29:513­530, 2003. Tysk C, Bohr J, Nyhlin N, et al: Diagnosis and management of microscopic colitis, World J Gastroenterol 14:7280­7288, 2008. Reactive arthritis (ReA) is a sterile, inflammatory arthritis that is typically preceded by a gastrointestinal or genitourinary infection occurring 1 to 4 weeks previously. Long-term (3 to 6 months) antibiotics may help Chlamydia-induced ReA but does not affect the course of ReA associated with enteric pathogens. Over 50% of patients have a self-limited course lasting 2 to 6 months, 30% have recurrent episodes, and 10% to 20% have a chronic course requiring immunosuppressive therapy. ReA is a sterile, inflammatory synovitis occurring within 4 weeks of an infection by organisms that infect mucosal surfaces, especially urogenital or enteric infections. The arthritis is typically an asymmetric oligoarthritis that predominantly involves lower extremity large joints. However, its acquisition is strictly dependent on infection with certain gastrointestinal (enterogenic) or genitourinary (urogenital) pathogens. These patients tend to have more severe arthritis, more extraarticular manifestations (uveitis, rash), a higher prevalence of sacroiliitis, and a more prolonged course. Serologic tests for Chlamydia, Salmonella, and Yersinia can be done depending on the suspected inciting agent. Patients with enterogenic ReA exhibit equal sex distribution, whereas those with the urogenital form are predominantly male. ReA is the most common type of inflammatory arthritis affecting young adult males. Although the initial infection may be mild or inapparent (10% to 30%), most patients will develop systemic symptoms within 1 to 4 weeks. Circinate balanitis and keratoderma blennorrhagicum are relatively specific for ReA. Similarly, keratoderma blennorrhagicum refers to psoriasiform lesions occurring primarily on the plantar surface of the heel and metatarsal heads. Both lesions are predominantly associated with urogenital ReA (Chlamydia) and resolve spontaneously. In ReA, the joints tend to be moderately inflamed and characterized by prolonged stiffness. Joint involvement is typically asymmetric, oligoarticular (less than five joints), and confined to the knees, ankles, and/or feet. Enthesitis is an inflammation of the ligament, tendon, joint capsule, or fascia insertion site into bone (enthesis). In ReA, enthesitis commonly causes heel pain (Achilles tendon and plantar fascia), metatarsalgia (plantar fascia), and iliac spine/crest pain. Dactylitis ("sausage" digits) of fingers and toes are due to a combination of arthritis, enthesitis, and tendinitis. Forty percent of patients with ReA may have axial skeleton symptoms, and 25% develop radiographic changes. A comparison of the clinical features of ReA with gonococcal arthritis is given in Table 36-1. A comparison of the clinical features of ReA with rheumatoid arthritis is given in Table 36-2. The diagnosis of ReA is clinical, and no laboratory investigation can substitute for a proper history and physical examination. Arthrocentesis is the most valuable test, because it excludes septic and crystalline arthritis Table 36-3). The synovial fluid typically reveals a predominance of leukocytes, ranging from 5000 to 50,000 cells/mm3. In acute ReA, most of these cells are neutrophils, but in chronic disease, either lymphocytes or monocytes may be prevalent. Other synovial fluid characteristics include decreased viscosity, normal glucose level, and increased protein. These radiographic features are typical of all seronegative spondyloarthropathies. There are large, nonmarginal syndesmophytes, called "jug-handle" syndesmophytes, which usually occur in an asymmetric distribution. B-Bony reactivity and proliferation at enthesis sites (Achilles tendon and plantar fascia insertions) and periostitis are common. Bone demineralization (periarticular osteopenia) may be observed in a periarticular distribution compatible with an inflammatory arthritis. C-Cartilage-space narrowing occurs uniformly across the joint space of weight-bearing joints compatible with an inflammatory arthritis. Radiograph of foot in a patient with reactive arthritis showing erosions of the interphalangeal joint of the great toe and second and third metatarsophalangeal joints. D-Distribution of arthritis is primarily in the lower extremity, whereas psoriatic arthritis usually affects the upper extremity. How do the radiographic features of sacroiliac and spine involvement in ReA compare with those in ankylosing spondylitis? Note that 100% of patients with ankylosing spondylitis develop radiographic changes in the sacroiliac joints, compared with only 25% of ReA patients Table 36-4). Note: unilateral sacroiliitis without peripheral arthritis does not occur in ReA and should suggest another diagnosis. However, this test may be of value if the clinical picture is incomplete, such as in the absence of an antecedent infection or lack of extraarticular features. Transient relief of joint inflammation may be obtained by use of ice packs and/or warm compresses. Once inflammation subsides (1 to 2 weeks), passive strengthening and range of motion exercises should be initiated. Elimination of the "triggering" infection with appropriate antibiotics is the first therapeutic goal in ReA. This is especially true for Chlamydia infections (azithromycin 1 g single dose or doxycycline 100 mg twice a day for 7 days, both patient and partner). The mucocutaneous features of ReA are usually self-limited and may require no specific therapy. Topical corticosteroids and keratolytic agents may help keratoderma blennorrhagicum. Systemic corticosteroids in low or moderate doses (5 to 10 mg/day) are usually ineffective in ReA, but a therapeutic trial of 30 to 60 mg/day may be warranted in patients having resistant disease and disorders. In most patients (>50%), remission of symptoms usually occurs within 2 to 6 months after disease onset but may take as long as 1 year. Other disease-modifying agents, such as methotrexate and leflunomide, have also been used with variable success. Tumor necrosis factor- blocking agents have been reported to be successful in many patients. All patients and their sexual partners should be treated for Chlamydia-positive urethritis associated ReA (see Question 19). However, because chlamydial organisms have been demonstrated in a metabolically active state in the synovial tissue, some rheumatologists advocate a 3-month trial of doxycycline or minocycline 100 mg twice a day for Chlamydia-confirmed or suspected ReA. Recently, the combination of either doxycycline (100 mg twice a day) plus rifampin (300 mg daily) or azithromycin (500 mg daily for 5 days, then twice a week) plus rifampin for 6 months was shown to be effective therapy in some patients with long-standing chronic Chlamydiainduced ReA. Antibiotic therapy for postenteric-associated ReA has not been demonstrated in trials to reduce severity of arthritis. The demonstration of bacterial cell wall antigens but not nucleic acid in synovial tissue suggests that bacterial antigens alone, not viable microorganisms, may perpetuate this type of ReA and therefore antibiotics are not effective. Azithromycin (1 g) as a single dose for urethritis or azithromycin (1 g) as a single dose (Campylobacter) plus ciprofloxacin (750 mg) as a single dose (Salmonella, Shigella, and Yersinia) at onset of diarrhea has anecdotally prevented the subsequent redevelopment of ReA. Although the prognosis of ReA is variable, most patients fully recover from their initial illness. However, a significant number (15% to 50%) will have one or more recurrences of ocular disease, mucocutaneous lesions, and/or arthritis.

Once the organism has been identified virus vs disease purchase 250 mg keflex free shipping, the antibiotic regimen Table 38-5) can be tailored as follows: parental therapy should be initiated for at least 2 weeks antibiotic resistance definition cheap keflex generic, followed by 2 to 4 weeks of oral therapy virus 2014 usa purchase keflex mastercard. Despite better drainage and antibiotics polysorbate 80 antimicrobial 250mg keflex fast delivery, this remains a serious disease with 2% to 10% mortality antimicrobial keyboard and mouse order keflex 500mg online. Most of these patients (25% to 60%) have a chronic debilitating underlying disease oral antibiotics for dogs hot spots buy genuine keflex online. Of the surviving patients, between 30% and 50% have residual abnormalities (pain or limited motion of the joint). The patients are usually those with longstanding seropositive disease, marked disability, and a history of corticosteroid use. The mortality is 25%, with only half of those surviving attaining their preinfection level of functioning. Increased propensity to affect the axial skeleton (especially the lumbar vertebrae, sacroiliac joint, symphysis pubis, ischium, and sternocostal articulations). The overall infection rate in primary total joint replacement is approximately 1% to 2%. These patients present with fever and local signs of wound infection typical of septic arthritis. These organisms can get into the polysaccharide mucoid biofilm (glycocalyx) that forms on the prosthetic joint and provides a protective environment for bacterial growth. Patients present with progressive joint pain but frequently do not have other symptoms typical of septic arthritis. Late infections (>24 months) are the result of hematogenous seeding from a distant site of infection such as the skin, mouth, or urinary tract. Patients have acute onset of joint pain, swelling, and fever typical of septic arthritis. Infection should be suspected in any patient with progressive pain in a prosthetic joint. Radiographs may show greater than 2 mm lucency between bone and cement but this does not separate infection from aseptic loosening. The procedure of choice is combined bone marrow scan/indium scan showing increased uptake around the prosthesis (the bone scan should normally be negative 8 months after surgery). However, positive cultures of synovial fluid or tissue are needed to confirm the diagnosis. The presence of granulocytes in biopsies of periprosthetic tissue is supportive diagnostically. Occasionally (<10% of large joint prosthesis infections) patients who have had symptoms for less than 1 week, negative preoperative synovial fluid cultures, no sinus tract, and a stable implant can be treated with debridement and antibiotics without removal of the prosthesis. However, most surgeons favor a three-stage procedure: (1) prosthesis and cement removal with stabilization of the joint using an antibiotic-impregnated spacer; (2) prolonged (6 weeks) systemic antibiotics; and (3) delayed implantation with antibiotic-impregnated cement. Rifampin use in conjunction with other antibiotics has been an effective additive therapy. The cultures are negative, and patients respond to increased corticosteroids rather than antibiotics. Unlike nongonococcal septic arthritis, the typical patient who develops gonococcal arthritis is a young, healthy person. Other risk factors include urban residence, non-white race, low socioeconomic status, low educational status, prostitution, and previous gonococcal infection. Typically, symptoms develop 1 day to several weeks after the sexual encounter and commonly (in 50% of female patients) occur during the week of the menstrual period in women. The presence of outer membrane opacity-associated protein increases its virulence and also its ability to disseminate. Antibiotic resistance may be mediated by plasmids or chromosomal-mediated mutations. Congenital or acquired complement deficiencies, especially of C6­C8, predispose to recurrent Neisseria infections. The interaction between the neisserial organism and the complement system is critical to eradicating it from the blood stream. Migratory polyarthralgia 70% Tenosynovitis 67% Purulent arthritis 42% Monoarthritis 32% Polyarthritis 10% An important diagnostic clue is tenosynovitis. However pustules, hemorrhagic bullae, vasculitis, and erythema multiforme may be seen. At this stage, blood cultures may be positive but synovial fluid cultures are negative. Unlike other causes of septic arthritis, the small joints of the hand are frequently involved. At this stage, synovial fluid cultures can be positive but blood cultures are negative. Notably, patients can present with this septic arthritis without having previous symptoms of the bacteremic stage. How useful are cultures and Gram stains in diagnosing gonococcal septic arthritis? Unlike nongonococcal arthritis, in gonococcal arthritis the Gram stains of synovial fluid are positive in less than 25% of cases. Because urethritis is often asymptomatic, appropriate smears and urethral cultures should always be obtained. Urethral smears and cultures are more useful in men (>90% sensitivity) than in women Table 38-6). Additionally, specimens obtained from contaminated sites (genitourinary tract, pharynx, and rectum) should be cultured on Thayer­Martin media. Specimens from noncontaminated areas (synovial fluid and blood) should be cultured on chocolate agar. Always use culture plates that have been warmed to body temperature and plate specimens immediately, often at the bedside. Patients and their partners should also receive empiric treatment for coexistent and/or silent Chlamydia infections (doxycycline, 100 mg orally twice daily for 7 days or azithromycin 1 g Ч 1 dose, especially if the patient is pregnant). Synovial fluid cultures are positive in 20% and should be kept for 7 days instead of the usual 3 days. Most patients respond well to antibiotics (thirdgeneration cephalosporin) and joint drainage. One should suspect syphilis in patients with polyarthritis who have a maculopapular rash on their palms and soles (75% to 100%), generalized lymphadenopathy (75%), headache (50%), fever (50%), sore throat (33%), mucosal ulcers, and condyloma lata. The arthritis is symmetric and involves the knees and ankles more than the small joints of the hands. The olecranon (adults) and prepatellar (children) bursae are the most common sites of septic bursitis. Most septic bursitis occurs in patients who constantly traumatize the skin in these areas (carpenters, laborers). More than 50% also have a surrounding cellulitis and a few patients may get a noninflammatory sympathetic joint effusion of the underlying joint. Blood cultures are rarely positive because the organisms get into the bursa by transcutaneous spread through skin abrasions. Antibiotics should be administered intravenously initially and the bursa aspirated repeatedly or incised and drained. This is especially important for febrile patients or those who are immunocompromised. After control of the infection, oral antibiotics are taken for an additional 2 to 3 weeks. Patients typically present within a few days with fever, pain, and decreased range of motion of the involved bone/joint. Bone scans may be difficult to interpret as a result of growth plate activity in children. Chronic osteomyelitis usually occurs in adults secondary to an open wound or fracture. Vertebral osteomyelitis as a result of hematogenous spread and spine surgery is also seen. Radiographic changes are seen 2 to 3 weeks after the onset of infection and reveal osteolysis, periosteal reaction, and sequestra. Gutierrez K: Bone and joint infections in children, Pediatr Clin North Am 52:779­794, 2005. Hariharan P, Kabrhel C: Sensitivity of erythrocyte sedimentation rate and C-reactive protein for the exclusion of septic arthritis in emergency department patients, J Emerg Med 40:428, 2011. Zimmerli W: Clinical practice: vertebral osteomyelitis, N Engl J Med 362:1022­1029, 2010. Zimmerli W: Infection and musculoskeletal conditions: prosthetic-joint-associated infections, Best Pract Res Clin Rheumatol 20:1045­1063, 2006. Diagnosis is confirmed by a positive immunoglobulin G (IgG) Western blot for Borrelia burgdorferi in the serum of a patient with appropriate clinical findings. Oral antibiotics are effective for prevention and early disease but intravenous antibiotics are necessary for disseminated disease. Coinfection with Babesia or Anaplasma in any patient with hemolysis, neutropenia, and/or thromboctopenia should be considered. Lyme disease was first recognized as a distinct entity in Old Lyme, Connecticut, in 1975. The outbreak in this rural community was consistent with an infectious etiology transmitted by an arthropod vector. To put things in perspective, Lyme disease is the most common vector-borne disease in the United States and Europe and the second most common in the world (malaria being the most common). Lyme disease in the United States is caused by an infection with the tick-borne spirochete, B. There are many similarities to syphilis; it is a multisystem disease that occurs in stages that can mimic other diseases. Borrelia can only rarely be cultured from the blood or other infected tissues, and the incubation period is 3 to 32 days. What is the geographic distribution and seasonal occurrence of Lyme disease in the United States? Lyme disease is tick-borne and is most prevalent from April or May to November in the endemic areas. The peak incidence is in late spring and the early summer months of June and July. Lyme disease has been reported in many of the 48 contiguous states, but most cases occur in three regions: · the northeast coast, between Maine and Maryland · the midwest, in Wisconsin and Minnesota · Along the western coast of northern California and Oregon the disease also occurs in Europe (highest in Slovenia, Austria), Scandinavia (Sweden), China, Asia, Japan, and Australia. Ixodes scapularis (previously called Ixodes dammini) was the tick first described to carry the causative organism and is the vector in the northeast and midwest United States. Ixodes pacificus is the vector on the west coast, and its preferential host is the lizard, which is not a very good reservoir for Borrelia. Other Ixodid species are the vectors in other parts of the world: Ixodes ricinus in Europe, where Lyme disease is common, and Ixodes persculatus in the former Soviet Union and Asia. They require a blood meal that they get from the white-footed mouse, which is an asymptomatic reservoir for Borrelia. At that time the nymphs emerge again to get a blood meal (and Borrelia) from the white-footed mouse. Infected nymphs can pass Borrelia on to other mice and humans when they take a blood meal. Later the nymphs become adults and the females feed on white-tailed deer (in the region of their shoulder, hence I. Borrelia infection occurs through the bite of the Ixodid tick, an event remembered by only half of patients with Lyme disease-a key point to remember when taking a history. The tick has a slow, extended feeding cycle, and hours after feeding it regurgitates transmitting Borrelia to the animal host. Other ticks have been shown to harbor Borrelia, including the Lone Star tick (Amblyomma americanum) and the American dog tick (Dermacentor variabilis). The disease is frequently thought of as a "rash-arthritis" complex, even though the arthritis may be a late manifestation. In addition, the nervous system (both central and peripheral) and cardiac system may be involved. In Europe, where all three strains of Borrelia can cause infection, arthritis is less common (15%) but meningoradiculoneuritis as a result of B. Atypical skin lesions can be seen and include diffuse erythema, urticaria, evanescent rashes, and a malar rash. What are the stages of Lyme disease, their temporal relation, and which organ systems are involved in each stage? The third stage occurs an average of 6 months after disease onset but may occur as soon as 2 weeks or as late as 2 years after disease onset. What clinical manifestations occur in the second stage (disseminated infection) of Lyme disease? A motor or sensory radiculoneuritis, subtle encephalitis with cognitive dysfunction, mononeuritis multiplex, myelitis, chorea, and cerebellar ataxia can also occur. Secondary (satellite) skin lesions are common (50%) and indicate spirochetal dissemination. Lymphadenopathy, splenomegaly, mild hepatitis, sensorineural hearing loss, iritis/ keratitis, and severe fatigue can occur. Describe the clinical manifestations of the third stage (late disease) of Lyme disease. The third stage of Lyme disease occurs in 10% of untreated patients and represents persistent infection as a result of B. This stage usually involves episodic attacks of an asymmetric oligoarticular arthritis affecting the large joints (the knee 80% of the time). In less than 10% of patients, the arthritis becomes more persistent and chronic, usually affecting the knee.

If a fracture is suspected as a cause of hemarthrosis antimicrobial coatings discount 250 mg keflex visa, evaluate the synovial fluid for fat droplets do they give antibiotics for sinus infection buy keflex 750mg low price, which indicates release of bone marrow elements through bony disruption bacteria unicellular order keflex pills in toronto. If a symptomatic joint in a patient with hemophilia does not improve with factor replacement antibiotics for sinus infection in babies cheap generic keflex uk, consider infection infection from bee sting discount keflex 500mg visa. Salmonella accounts for 50% of osteomyelitis infections in patients with sickle cell disease virus united states department of justice purchase cheap keflex on-line. Up to 40% of sickle cell patients will experience osteonecrosis of the femoral or humeral head. The diagnosis may be readily apparent in the setting of hemophilia, but in other circumstances it is less clear. Streaks of blood, as opposed to the uniformly bloody fluid of a hemarthrosis, may be seen in the synovial fluid during routine arthrocentesis because of needle trauma to skin or other periarticular structures. Blood that appears in the synovial fluid at the end of an arthrocentesis is also because of trauma, particularly if the initial synovial fluid was not bloody. During an arthrocentesis, if frankly bloody fluid is seen initially on entering the joint, hemarthrosis must be suspected. If the original arthrocentesis was traumatic, synovial fluid obtained from the new site should become clear or be only bloodtinged. A hematocrit similar to peripheral blood is more likely from a traumatic arthrocentesis, whereas fluid from a hemarthrosis has a hematocrit less than peripheral blood. A major concern with hemarthrosis is long-term joint damage owing to inflammation resulting from recurrent bleeding. As such, accurately identifying hemarthrosis and instituting appropriate treatment can reduce long-term joint-related disability. What finding in the bloody synovial fluid may indicate a fracture has caused the hemarthrosis? A fracture may release blood and bone marrow elements including lipids into the synovial fluid. These fat globules may be seen floating at the top of the synovial fluid by bedside visualization of the fluid in the syringe or collection tube. If there are fat globules present in the synovial fluid identified by oil red O staining, a fracture should be suspected. Is it safe to perform arthrocentesis when a patient has a prolonged prothrombin time from warfarin therapy? If a patient on warfarin develops an acute monoarthritis, diagnostic aspiration is warranted, even if the prothrombin time is excessively prolonged. In addition, some authorities report that reversal of anticoagulation is not necessary if the proper technique is carefully observed and an appropriately small gauge needle is used. Caution should be observed, particularly in large joints where it is difficult to apply direct pressure, such as the shoulder or knee. There are no specific published guidelines for reversal of anticoagulation before arthrocentesis; however, fresh frozen plasma or small doses of vitamin K (0. Vitamin K should never be given subcutaneously as it may cause prolonged reversal of anticoagulation from warfarin. A mild compression bandage and ice may be applied and analgesia provided with acetaminophen or narcotics. Symptoms usually spontaneously subside if the prothrombin time is reduced from supratherapeutic to simply therapeutic. Occasionally, an intraarticular injection of corticosteroids such as triamcinolone hexacetonide will be needed to control symptoms. Destructive arthritis from a single episode of hemarthrosis is rare; however, chronic joint destruction resulting from recurrent bleeding from warfarin therapy has been reported. As the joint capsule distends, severe pain follows with swelling from effusion and decreased range of motion. The swelling will eventually tamponade the bleeding and the hemarthrosis will gradually resolve over a matter of days to weeks. Almost all patients with severe hemophilia (<1% of normal factor activity) and half of patients with moderate disease (1% to 5% factor activity) will have recurrent hemarthroses spontaneously or following minor trauma. If factor levels are >5% of normal, hemarthroses tend to be less frequent or occur following more significant trauma. Hemarthroses first begin to occur in weight-bearing joints when a child is just learning to walk. The mainstay of therapy for acute hemarthrosis in hemophilia is rapid replacement of deficient factor to achieve a level of 30%. In appropriate patients, factor replacement therapy can be promptly instituted by the family at the first symptoms of hemarthrosis to decrease the risks of sequelae. Patient education and involvement are critical for the success of any treatment program. Other initial treatment consists of placing the joint at rest in as much extension as can be tolerated (to prevent contractures), with applications of ice packs and other local measures. Once acute bleeding and pain are controlled, graded physical therapy to prevent muscle atrophy and contractures should be instituted. When should septic arthritis be suspected if a hemophiliac develops acute monoarthritis? The presence of fever and/or if the pain of a suspected hemarthrosis fails to improve after factor replacement, concomitant septic arthritis must be suspected and aspiration of the joint becomes mandatory. Any synovial fluid obtained on routine aspiration of a hemarthrosis should be submitted for Gram stain and culture. Staphylococcus aureus and Streptococcus pneumoniae are most common organisms identified (Box 49-2). Do recurrent hemarthroses have any long-term consequences in patients with hemophilia? As the patient approaches adulthood, acute hemarthroses become less frequent but chronic joint symptoms supervene. Recurrent hemarthroses lead to accumulation of hemosiderin in the joint lining tissues. The end result is a chronically swollen joint, less painful than seen in acute hemarthroses, with decreased range of motion. Surrounding muscles become atrophic and joint contracture is a frequent complication. The regular administration of factor replacement prophylactically has reduced the risk of developing subsequent chronic arthropathy. Radiographs in acute hemarthrosis will be remarkable for soft tissue swelling, increased synovial density (iron deposition), and effusion. Chronic arthropathy of hemophilia may have both inflammatory (erosive) and degenerative features. The treatment principles for chronic hemophilic arthropathy are outlined in Box 49-3. Hand­foot syndrome, or sickle cell dactylitis, is a problem in infants with sickle cell disease. Note degenerative and erosive changes of both femoral condyles and the tibial plateau. Subperiosteal new bone formation may be seen on radiographs of the metacarpal or metatarsal bones 2 weeks after the acute episode. Patients with sickle cell (S-S) disease or the heterozygous state (sickle- thalassemia, S-C, S-D disease) frequently experience polyarthralgias. Local sickling of cells leads to obstruction of the microcirculation and to bone infarctions. During painful crises, patients may experience chest, abdominal, back, muscle, and joint pain caused by microinfarctions. Other musculoskeletal manifestations including painful large joint arthritis (usually the knees) often with noninflammatory synovial effusions lasting a few days to 3 weeks can also occur. These effusions are attributable to bone infarctions causing a "sympathetic" transudative effusion, which is unresponsive to intraarticular corticosteroids. Alternatively, some patients during an acute painful crisis will develop a monoarticular or oligoarticular inflammatory arthritis that resolves within a week. Finally, osteonecrosis of larger bones (frequently multifocal) such as the femoral or humeral head is seen in up to 40% of patients with sickle cell disease. Name two characteristic radiographic findings that can be seen in the spine in patients with sickle cell disease. Vertebral bodies can have a characteristic "Lincoln log" or H-shaped appearance owing to epiphyseal infarction from sickled cells causing endplate collapse. A second radiographic abnormality that may be observed is a central cup-like indentation ("codfish vertebrae") owing to osteoporotic weakness of the vertebrae caused by marrow expansion. Can osteonecrosis of the femoral head be treated in the setting of sickle cell disease? The patient may be put on nonweight-bearing status in an attempt to allow revascularization and prevent collapse of the affected bone, although this is rarely effective. Prosthetic joint replacement is often the treatment used when joint damage is advanced, although results are suboptimal. In one series, 19% of total hip replacements for avascular necrosis of the femoral head in sickle cell disease required revision within 5 years. In children with sickle cell disease, hyperuricosuria without hyperuricemia occurs, probably as a result of increased red cell turnover associated with crises. Up to 40% of adult sickle cell patients will have hyperuricemia, caused by renal tubular damage with decreased uric acid excretion. Occasionally, gout may be seen, so crystals should be looked for in joint effusions seen during sickle cell crisis. What is the most common musculoskeletal infectious problem seen in sickle cell disease? Osteomyelitis is seen more than 100 times more frequently in sickle cell disease than in normal individuals. Because of functional asplenia, Salmonella infections account for 50% of osteomyelitis especially in children with sickle cell disease. Fortunately, septic arthritis is infrequent but is usually caused by Staphylococcus aureus or a gram-negative organism other than Salmonella when it occurs. The large proportion of gram-negative infections may be as a result of bacterial translocation across bowel mucosa that has been compromised by microinfarcts from sickling cells (Box 49-4). Factors Predisposing Sickle Cell Patients to Infection Functional asplenia with decreased clearance of bacteria Tissue damaged by crisis Decreased neutrophil function at lower oxygen tensions Decreased opsonization Decreased interferon- production Increased risk of nosocomial infection 21. Presentation of osteomyelitis may be subtle, mimicking sickle crisis or affecting multiple areas. Both sickle crisis and osteomyelitis may present with bone pain, fever, and leukocytosis, and radiographs may be identical although patients with osteomyelitis have more severe symptoms. An absolute band neutrophil count of >1000/mm3 is more suggestive of osteomyelitis than infarction or crisis. The management of suspected osteomyelitis in sickle cell disease is outlined in Box 49-5. Generally, rheumatologic manifestations are less common in these other hemoglobinopathies. There are case reports of osteonecrosis occurring in patients with sickle cell trait, but the incidence is the same as in age-matched controls with normal hemoglobin. Chelation therapy with deferiprone (to reduce iron overload from transfusions) can cause arthralgias in 20% of patients. Hydroxyurea is used in sickle cell to increase levels of fetal hemoglobin which does not readily sickle; in addition, hydroxyurea is used for other hematologic conditions such as myelofibrosis and thrombocytosis. These include skin ulcers that are typically seen in the lower extremities and can mimic systemic vasculitis. Hydroxyurea has also been associated with development of a painful discoloration of the hands and feet (palmar-plantar erythrodysethesia) that is also occasionally associated with blisters. It has also been associated with alopecia, and dermatomyositis-like and scleroderma-like syndromes. Check baseline complete blood count, erythrocyte sedimentation rate, and C-reactive protein. Obtain plain radiographs of all involved bones; repeat these in 10 to 14 days if the originals are normal. After a diagnosis is established, preoperative measures are instituted to decrease the risk of surgical complications (transfusions to achieve hemoglobin A level 60% of total hemoglobin, maintenance of adequate oxygenation and hydration). Do not start antibiotics until adequate specimens of blood, bone, and pus are obtained for culture and Gram stain. Initiate antibiotics based on Gram stain results, considering the possibility of Salmonella. Note that sickle cell disease is associated with an abnormally low erythrocyte sedimentation rate because the sickled cells cannot form good rouleaux. Radionuclide scans are not as useful for differentiating bony infarction and osteomyelitis but will identify affected areas in the spine or pelvis, or unsuspected multifocal involvement. Prolonged therapy is necessary because both infection and sickle cell crisis impair blood flow to the affected bone. Angastiniotis M, Eleftheriou A: Thalassaemic bone disease, Pediatr Endocrinol Rev 6(Suppl 1):73­80, 2008. Jean-Baptiste G, De Ceulaer K: Osteoarticular disorders of haematologic origin, Best Pract Res Clin Rheumatol 14:307­323, 2000. Prabhakar H, Haywood C Jr, Molokie R: Sickle cell disease in the United States: looking back and forward at 100 years of progress in management and survival, Am J Hematol 85:346­353, 2010. Lymphoma and common solid tumors may be associated with connective tissue disease. Leukocytoclastic vasculitis is the most common paraneoplastic vasculitis presentation. However, rheumatic syndromes have been associated with various malignancies, and patients with preexisting connective tissue disease have developed malignancies.

Injuries of the Perineum A minor degree of laceration of the perineal body often occurs during childbirth irrespective of the skill with which Chapter 15 · Injuries of the Female Genital Tract the delivery is performed virus with sore throat proven keflex 750 mg. Some degree of perineal laceration occurs in nearly all normal deliveries while the incidence is greater if obstetric operations have been performed infection game order discount keflex online. Lacerations are five to six times more frequent with primiparae than with multiparae bacteria zombie plants purchase online keflex. In the second degree antibiotic hand soap order generic keflex from india, the muscles of the perineal body are torn through antibiotic resistance metagenomics buy generic keflex, while in the third degree the tear extends partially backwards through the external sphincter of the anus antibiotic resistance peter j collignon cheap keflex 500 mg free shipping. A rare type of tear is the central tear of the perineum when the head penetrates first through the posterior vaginal wall, then through the perineal body and appears through the skin of the perineum. As much as 35% primipara women have shown to have sustained occult sphincter injury as seen on anoendosonogram. First-degree lacerations, restricted to the skin of the fourchette, have no influence upon the integrity of the pelvic floor, but if the lacerations are not sutured after delivery, the vaginal orifice becomes more patulous. In practice, small lacerations of the fourchette are not sutured unless they extend to the skin of the perineum, where they are more likely to become infected and to cause pain. Second-degree lacerations should always be sutured carefully immediately after delivery. The pelvic floor is weakened unless the injury to the muscles of the perineal body is efficiently repaired. If the decussating fibres of the levator ani muscles are torn through, the hiatus urogenitalis becomes patulous and prolapse of the vagina and the uterus is likely to develop, unless these lacerations are sutured immediately after delivery. With extensive second-degree tears, the patient should be given a local, regional pudendal block or general anaesthetic, placed in the lithotomy position, and the torn muscles of the perineum identified and sutured together with catgut. The torn edges of the vagina and the skin of the perineum should then be sutured together with catgut. The essential part of the after treatment of perineal lacerations consists in keeping the perineum clean. The wound should be cleaned with an antiseptic solution such as Betadine after micturition and defaecation. Third- and fourth-degree tears are much more important, because unless they are efficiently repaired immediately after delivery, the patient becomes incontinent of faeces and flatus. Amongst the predisposing causes of complete tear of the perineum are forceps delivery in the persistent occipitoposterior positions, and extraction of the after coming head in breech presentation. A properly performed episiotomy will very largely eliminate the risk of a third- and fourth-degree tear. This type of tear is more common with median episiotomy than mediolateral episiotomy. Complete tear of the perineum should be repaired as soon as possible after the delivery. A practitioner should not undertake the repair of a complete tear of the perineum single-handedly. The operation should be undertaken under anaesthesia with the patient lying in the lithotomy position in good light and with good assistance. The operation should be regarded as a surgical emergency and there is no excuse for delay. The immediate repair of a complete tear of the perineum is a relatively simple procedure, since the muscles of the perineal body, though torn, can be distinguished without much difficulty. The surrounding skin is first cleaned and the operation area isolated with sterile towels. A sterile pack is placed in the vagina and the limits of the laceration defined with tissue forceps. A few Lembert sutures are then introduced to invaginate the torn edges of the bowel wall. The muscles of the perineal body are now sutured together, and every effort should be made to obtain exact anatomical reposition. Particular attention must be paid to the sphincter ani muscle, and at least two Vicryl sutures should be used to draw the cut edges together. The tears in the vaginal wall and in the skin of the perineum are now repaired with interrupted catgut sutures. Care should be taken to avoid tying the sutures too tightly; otherwise, oedema of the perineum will lead to severe pain and cause the stitches to cut through. If a complete tear of the perineum is treated by immediate suture, the end result is satisfactory if correct anatomical reposition has been attained. If primary union of the vagina and the perineal skin is not obtained the wound should be kept clean and encouraged to granulate by frequent sitz baths. The end results are often functionally good in spite of the initial breakdown of the suture line. The bowels should be confined for at least 5 days, solid foods withheld and intestinal antiseptics given, along with stool softeners. Lately, instead of end-to-end suturing of the torn sphincter muscles, overlap technique is recommended to yield a stronger sphincteric control. Old-Standing Complete Tears Various degrees of complete perineal tears, usually resulting from careless attempts at immediate suturing, are not unusual. The red glistening mucous membrane of the anal canal and rectum protrudes and fuse directly with the vaginal wall without any of the perineal tissues intervening. Behind the anus are the radial folds in the skin which are corrugated by the underlying contracted subcutaneous sphincter. The external sphincter is only present posteriorly and the absence of the sphincteric grip is appreciated by inserting a finger into the anus. One of the most interesting features of the complete tear of the perineum is that it is very rarely if ever associated with prolapse, although the decussating fibres of the levator ani muscles have been torn through. The reason is that the patient continuously draws together the two levator ani muscles in an effort to close the bowel so that by constant use the tone of the muscles becomes exceptionally good. This firmness and good development of the levator muscles is found on clinical examination when the levator muscles are palpated. The technical difficulties are much greater in old cases than in those operated upon immediately after delivery. The optimum time for operation in the case of old tears is 3­6 months after delivery. If the operation is attempted earlier than this, healing by first intention is exceptional while if the operation is further delayed, dense scar tissue may be deposited which adds to the operative difficulties. Preoperative preparation is of importance, and the patient should be kept in the hospital for a couple of days before the operation during which time the bowels should be emptied by aperients and enemas, and the vagina disinfected by douching and by insertion of gauze packs soaked in flavine 1 in 1000 or Betadine lotion. The bacterial flora of the bowel should be controlled by phthalylsulphathiazole or neomycin, given in large doses for 3 days before the operation. The patient should be put on a nonresidual diet such as milk and fluid for 2 days prior to surgery. Various techniques have been described in the operative treatment of complete tears of the perineum, but the underlying principles are the same in all. The rectum must be dissected from the vagina by incising the intervening scar tissue and by dissecting upwards in the rectovaginal septum. Perhaps the most important step in the operation is to dissect the rectum clear of scar tissue and to mobilize it so that it can be brought down, without tension to the anal region. The tear in the rectum and anal canal is now repaired by excising scar tissue, freshening the cut edges and suturing them together with fine Vicryl sutures mounted on an atraumatic needle and tied within the bowel. The wound in the bowel is now invaginated with a layer of interrupted Lembert sutures. Next, the deep muscles of the perineal body and the levator ani are identified and sutured together with no. It is important to ensure that the muscles are dissected clear of scar tissue and are mobilized. The next important step in the operation is to suture together the torn edges of the external sphincter. These must be carefully defined, dissected clear of scar tissue and sutured together with three or four separate Vicryl sutures. The remains of the superficial muscles of the perineum are now sutured together with catgut and then the cut edges of the vagina and the perineum are repaired, interrupted catgut sutures being used. These principles are uniformly followed in the various methods described for the treatment of a complete tear of the perineum. Lately, many gynaecologists believe in overlap of sphincteric sutures to strengthen the tone and function of the sphincter, though others feel this overlap technique has no bearing on the surgical outcome. A few patients develop the tone of the levator muscles so well that they only suffer incontinence of flatus. These women will complain of incontinence of faeces only if they develop diarrhoea. The dotted line illustrates the position of the incision made in the operation of repair (a) and (d) represent the two ends of the torn fourchette, the dimples adjacent to (b) and (c) mark the situation of the cut edges of the external sphincter. Chapter 15 · Injuries of the Female Genital Tract 203 Vaginal Lacerations Vaginal lacerations commonly occur following assisted instrumental vaginal deliveries (forceps or vacuum extraction), difficult breech extractions, or following shoulder dystocia. It is a good practice to inspect the lower genital tract under a good light after expulsion of the placenta, identify all tears and suture them meticulously. Sometimes a cervical tear may extend to the vault of the vagina and cause profuse bleeding. Tears extending to the base of the broad ligament may lead to a broad ligament haematoma which may require recourse to a laparotomy for its evacuation. Extensive tears involving the sphincter of the cervix may lead to preterm deliveries or habitual painless mid-trimester abortions due to incompetent cervix, necessitating surgical cerclage in future pregnancies. In women with a flat pelvis, the anterior lip of the cervix may get caught between the fetal head and the pubic symphysis resulting in an anterior bucket handle tear. Rarely in women with a small gynaecoid pelvis, a trial of labour may result in circumferential ischaemic necrosis of the lower part of the cervix and end up with an annular detachment of the cervix. An area of scarred skin is excised and the mucous membrane of the anal canal freshened at the edge. Three structures must be defined, freed of scar tissue and mobilized, namely (A) the mucous membrane of the anal canal, (B) the external sphincter and (C) the levator ani muscles. First the edges of the anal canal mucosa must be sutured together, then the cut edge of the sphincter and lastly the levator muscles. Afterwards the cut edges of the posterior vaginal wall and the skin of the perineum are sutured. Rupture of the Uterus After Treatment the most important part of the after treatment is to keep the wound dry. The perineum should be swabbed after micturition and defaecation with antiseptic solution and subsequently powdered. To achieve this, the patient is given only intravenous fluids for the first 2 days and oral fluids the next 2 days. Sulphathiazole or neomycin administered preoperatively should be continued for at least a week postoperatively. Systemic chemotherapy is necessary to prevent infection and it should be given for a week. Another complication that may develop is a rectovaginal fistula which is usually the result of faulty technique but also may be due to infection and breakdown of sutures. Misuse of oxytocics, or dehiscence of a previous uterine scar (caesarean section), rarely a haematometra or pyometra, may rupture spontaneously as a result of distension and thinning of the atrophic myometrium. Depending upon the cause and extension of tear, suturing or hysterectomy is performed. Perforation of the Uterus In the nonpregnant state, perforation of the uterus occurs mainly during the operation of dilatation and curettage. The perforation is more common if the uterus is soft as in pregnancy and in malignancy. The atrophic uterus of a menopausal woman can easily be perforated during curettage for postmenopausal bleeding. The intrauterine device may perforate the wall of the uterus, but remains within the myometrium. In the presence of pyometra and malignancy, immediate hysterectomy is strongly advised. The repair of the intestinal injury or resection and end-to-end anastomosis will be required depending upon the extent of the damage to the intestine. If the perforation is a large one or if the patient has completed her family, hysterectomy is the operation of choice. Uterine injury has been recently reported during hysteroscopic excision of the uterine septum. Severe lacerations and penetrating injury entering the pouch of Douglas require emergency surgical attention. Foreign bodies in the vagina cause inflammation and ulceration and rarely lead to fistula formation. Protecting the pelvic floor: Obstetric management to prevent incontinence and pelvic organ prolapse. Risk factors associated with uterine rupture during trial of labour after cesarean delivery: A case control study. It is important therefore to realize the risk of varieties of injuries to the small and large bowels in obstetrics and gynaecology. This chapter deals with the types of injuries, causes and preventive and therapeutic measures to deal with them. Although the general surgeon may be called to tackle the problem, the gynaecologist should be able, at least, to diagnose and manage a few of them.

Labial salivary gland biopsy exhibiting focal lymphocytic sialadenitis with a focus score 1 focus/4 mm2 infection 8 weeks after giving birth order generic keflex from india. Although not part of these criteria antibiotic powder for wounds buy keflex 250 mg mastercard, the addition of parotid ultrasound may increase the sensitivity of these criteria antibiotic resistance vertical horizontal generic keflex 750 mg mastercard. Most are cellulose-based (Refresh Tears antimicrobial growth promoters buy keflex 500mg on line, Genteal infection large intestine buy genuine keflex online, TearsNaturale) or polyol/glycerine-based (Blink Tears) infection 3 metropolis collapse buy keflex 750mg fast delivery. Artificial tears containing polyvinyl alcohol and/or vasoconstrictors (Visine) should be avoided. Those with a watery consistency may require frequent applications; more viscous preparations (Celluvisc, Systane Ultra) may provide longer benefit but may blur vision in some patients. Preservative-free artificial tears (Refresh, TheraTears, Soothe, Systane) are generally less irritating and should be used if patients use topical tears four or more times a day. Lacriserts (hydroxypropyl cellulose) are slow-release artificial tears that can be used but require a small amount of residual tear production to be effective and are expensive. It can initially sting and takes 4 to 12 weeks to effectively reduce inflammation. Evaporation of tears may be slowed by the use of glasses with side shields; swim goggles are an inexpensive means of obtaining occlusive eyewear. Temporary plugs (silicone, collagen) are generally inserted before permanent obstruction is considered. The complications of xerostomia are best prevented by good dental care, with frequent use of fluoridated toothpaste and mouthwash, daily flossing, as well as regular professional dental attention. Approaches to relieving symptoms and treating complications include: · Sugar-free (not just sugarless) gum, mints, or candies may stimulate salivary flow without increasing the risk of dental caries. Avoidance of alcohol, frequent water ingestion, and removal of nasal polyps to limit mouth breathing will help oral dryness. Topical drugs may be necessary because with significant salivary hypofunction systemically administered antifungal drugs may not reach the mouth in therapeutically adequate amounts. Dentures must be removed while the mouth is being treated and may also need to be treated in order to cure and prevent recurrence of oral candidiasis. Patients with significant oral and ocular dryness have been noted to have only 30% of their salivary/lacrimal glands infiltrated with lymphocytes and only 30% to 50% of the glands destroyed. Consequently, the remaining functioning glands can be stimulated to produce more tears and saliva with the use of oral secretaogues. Patients with narrow-angle glaucoma, asthma, or on beta blockers should avoid these drugs or be monitored closely. Fatigue is a common symptom that may be difficult to alleviate (rule out hypothyroidism). If associated with poor sleep, treatment similar to that recommended for fibromyalgia may be of benefit, although tricyclic antidepressants are likely to aggravate dryness of the mucous membranes. The best tricyclic antidepressant is desipramine, owing to low anticholinergic effects. If there are associated inflammatory parameters, such as an elevated sedimentation rate and/or hypergammaglobulinemia, the patient may benefit from treatment with an antimalarial or a low dose of prednisone (controversial). Severe extraglandular disease may require higher doses of systemic corticosteroids, azathioprine, mycophenolate mofetil, methotrexate, or cyclophosphamide. Rituximab in early trials has shown some benefit for organ threatening disease but does not help sicca symptoms and fatigue. Lymphoma should be treated in consultation with an oncologist and based on the type and stage of disease. A clinical, radiologic, and pathologic study, Am J Respir Crit Care Med 171:632­638, 2005. Classification and clinical significance of 52 patients, Medicine 83:96­106, 2004. Clinical immunologic expression in 1010 patients, Medicine (Baltimore) 87:210­219, 2008. One-in-five rule: 20% of deep venous thromboses, 20% of young adult strokes, and 20% of miscarriages are due to antiphospholipid antibody syndrome. Over 50% of patients who have had a clot or miscarriage due to antiphospholipid antibodies will have a recurrence without therapy. Anticoagulation and not immunosuppression is the main therapy to prevent recurrent thrombosis. To test for the lupus anticoagulant, a phospholipid-dependent screening assay is performed and if prolonged, normal plasma is added in a 1:1 mix. If the lupus anticoagulant is present, addition of platelet-poor normal plasma does not correct the prolonged assay but addition of excess phospholipid does. If a factor deficiency is present, the assay does correct with addition of normal plasma. Clinical: valvular heart disease, certain neurologic manifestations (chorea, seizures), nephropathy, livedo reticularis, pulmonary hypertension, thrombocytopenia, Coombs positive hemolytic anemia. Thrombocytopenia, recurrent miscarriage, and/or livedo reticularis may be present. Virtually any venous or arterial site has been affected by thrombosis from these antibodies. The site of initial thrombosis often predicts the site of recurrent thrombosis in a given individual. Some hematologists recommend doing both tests because in any one individual with a lupus anticoagulant one of these confirmatory tests may be positive, whereas the other is not abnormal owing to the heterogeneity of the lupus anticoagulants. Russell viper venom directly activates factor X and thereby bypasses the factors required in the intrinsic pathway of coagulation. Such candidate antigens include prothrombin, phosphatidylserine, phosphatidylethanolamine, vimentin­cardiolipin complex, annexin A5, thrombomodulin, protein C, and protein S. Of these, antiphosphatidylserine-dependent prothrombin antibodies are the most pathogenic. It contains five domains (sushi domains) and belongs to the complement control protein superfamily. It binds through its fifth domain to anionic phospholipid membranes and receptors. After binding, it undergoes a conformational change to an open "hockey stick" conformation. With this change it becomes antigenic by exposing hidden epitopes in the first domain. This can lead to complement activation with C5a release leading to recruitment and activation of neutrophils, monocytes, and platelets. Therefore, the inciting prothrombotic stimulus and cells involved may differ between episodes of thrombosis. Antibodies to prothrombin may be responsible for a positive lupus anticoagulant test increasing the risk for thrombosis. Conversely, antibodies to prothrombin may deplete prothrombin leading to hemorrhage. Levamisole-tainted cocaine can also cause these antibodies as well as cold agglutinins. L-Livedo reticularis: lace-like rash over the extremities and trunk exaggerated by cold conditions. Thromboses can occur in other areas leading to ischemic optic neuropathy, retinal artery or vein occlusion, sensorineural hearing loss, chorea, transverse myelitis, and cavernous or sagittal sinus thrombosis causing pseudotumor cerebri. Renal artery or vein thrombosis and a thrombotic microangiopathy can cause renal insufficiency. This provides an explanation on how infections can trigger a thrombotic event by linking the innate and adaptive immune systems (see also Question 13). However, it has become increasingly recognized that small vessels may be involved in visceral organs leading to clinical manifestations resulting from microinfarcts (skin necrosis, cerebral microinfarcts, gastrointestinal and hepatic microinfarcts, alveolar hemorrhage, renal insufficiency, hearing loss, bone marrow infarction, others). In some of these patients profound endothelial injury occurs in these microvessels leading to a microangiopathy with microangiopathic hemolytic anemia, severe thrombocytopenia, and thromboses of multiple small vessels. It is a very severe presentation and is defined as having three or more organs involved simultaneously or within 1 week. Asymptomatic patients (particularly those with high-risk profile) should receive prophylactic treatment to prevent clots when undergoing high-risk procedures even if they have no previous history of clot. In patients who are heparinized, heparin levels can be monitored directly to give an indication of anticoagulant effect. Because the risk of recurrent thrombosis is between 44% and 69%, most individuals will require lifelong anticoagulation. One area of controversy is the value of antiplatelet agents compared to warfarin as the best therapy. If large stroke, may continue this therapy for 2 weeks to prevent bleeding into damaged area of the brain. Because the risk of recurrent arterial thrombosis is over 50%, the patient should remain on therapy lifelong. Smoking must be discontinued and hypertension, hyperlipidemia, and diabetes should be controlled. Patients should be assessed for clinical factors and medications that increase bleeding risk before choosing therapy. This binding leads to complement fixation, complement split product (C5a) release, and influx of inflammatory cells causing a prothrombotic state. These manifestations are due to placental insufficiency from thromboses causing placental infarcts. If the patient is therapeutic but has a venous clot and is on once a day enoxaparin, then using twice-a-day dosing may be helpful. The concern is that if the patient misses even one dose they will become subtherapeutic. However, coagulation tests to detect the lupus anticoagulant are affected by heparin and warfarin, and care must be taken in determining lupus anticoagulants in this situation. In the patient on heparin, plasma can be treated with heparinase to remove the heparin before the coagulation tests. If you must decrease it more quickly, the patient can be given 1 mg of vitamin K orally or intravenously (not subcutaneously). This will decrease the excessive anticoagulation within 12 hours without making them resistant to warfarin for several days, which happens if vitamin K is given subcutaneously. Erkan D, Leibowitz E, Berman J, et al: Perioperative medical management of antiphospholipid syndrome, J Rheumatol 29:843­849, 2002. Finazzi G, Marchioli R, Brancaccio V, et al: A randomized clinical trial of high-intensity warfarin vs. Praprotnik S, Ferluga D, Vizjak A, et al: Microthrombotic/microangiopathic manifestations of the antiphospholipid syndrome, Clin Rev Allerg Immunol 36:109­125, 2009. Systemic illness characterized by quotidian fevers, transient rashes, and an inflammatory polyarthritis. Macrophage activation syndrome is a severe, life-threatening complication occurring in 5% to 10% of patients. Nonsteroidal antiinflammatory drugs and corticosteroids control 50% of patients with 33% going into remission. Methotrexate and biologics are required for 50% of patients including the 33% with a chronic disease course. The characteristic features of this illness have subsequently been reported in adults, as detailed by Eric Bywaters in 1971. Patients are usually young adults (75% before age 35 years) who present with a prolonged course of nonspecific signs and symptoms. The most striking manifestations are severe arthralgias/arthritis, spiking high fevers, and transient rashes. A prodromal sore throat due to perichondritis of the cricothyroid cartilage can occur days to weeks before other symptoms in 70% of cases. These patients appear severely ill and have often received numerous courses of antibiotics for presumed sepsis, although cultures are negative. In 20% of cases, the patient may have an additional early morning spike (double quotidian fever). This poses a dilemma for physicians, because hospital rounds and clinic visits may not occur during the times when the patient is febrile. The characteristic appearance is that of evanescent, salmon-colored, macular or maculopapular lesions that are nonpruritic. The rash is usually seen on the trunk, arms, legs, or areas of mechanical irritation such as tight clothing (beltline). Skin biopsies and immunofluorescent studies are nondiagnostic, showing dermal edema and a perivascular mononuclear cell infiltrate. It may not be present at the time of disease onset, may involve only one or a few joints, or be fleeting. With time, the arthritis frequently becomes polyarticular affecting both small and large joints. Joint erosions and/or fusion of the carpal bones (40% to 50%), tarsal bones (20%), and cervical spine (10%) may be seen but are more common in children than adults. Rather, the diagnosis is one of exclusion, made in the setting of the proper clinical features and laboratory abnormalities and the absence of another explanation (such as infection or malignancy) Table 24-2). Several criteria have been proposed with the Yamaguchi criteria being most commonly used. Exclusion: malignancy (especially lymphoma), infection (especially Epstein­Barr virus), other connective tissue diseases (especially vasculitis), and drug reactions. If symptoms are not controlled in 2 weeks then they are switched to low-dose prednisone (0. If prednisone cannot be tapered to a low dose without disease recurrence, methotrexate is added. The patients who experience a self-limited course undergo remission within 6 to 9 months. Of those with intermittent flares, two thirds will only have one recurrence, occurring from 10 to 136 months after the original illness. A minority of patients in this group will experience multiple flares, with up to 10 flares being reported at intervals of 3 to 48 months.

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