1/33. Management of heparin-associated thrombocytopenia in pregnancy with subcutaneous r-hirudin.heparin-induced thrombocytopenia type II is a serious, immune-mediated complication of heparin therapy. Due to its low cross-reactivity with heparin-associated antibodies (10-20%), danaparoid has successfully been administered in these patients. In recent studies, r-hirudin as a potent and specific thrombin inhibitor, was demonstrated to be a safe and effective anticoagulant. We report a pregnant woman with systemic lupus erythematosus and recurrent venous thromboembolism who suffered from heparin-induced thrombocytopenia type II while treated with dalteparin sodium. Positive cross-reactivities with danaparoid were found. Anticoagulation with 15 mg subcutaneous r-hirudin was performed twice daily from the 25th week of pregnancy until delivery. No thromboembolism or bleeding or fetal toxicity of r-hirudin was detected. Recombinant hirudin is a potent and specific thrombin inhibitor that can be used as a safe and effective anticoagulant in pregnancy.- - - - - - - - - - ranking = 1keywords = thromboembolism (Clic here for more details about this article) |
2/33. Coexisting dysfibrinogenemia (gammaR275C) and factor v Leiden deficiency associated with thromboembolic disease (fibrinogen Cedar Rapids).fibrinogen Cedar Rapids is a heterozygous dysfibrinogenemia (gammaR275C) that was associated with thromboembolism during and following pregnancy in three second-generation family members who also were heterozygotic for factor v Leiden (V R506Q). Like other dysfibrinogenemias with substitutions at position 275 of the gamma-chain, fibrinogen Cedar Rapids is characterized by defective end-to-end intermolecular fibrinogen and fibrin 'D : D' associations, a fibrin network structure that is composed of thicker and more highly branched fibers, normal fibrin 'D: E' associations, and normal factor xiii-mediated crosslinking of fibrinogen and fibrin. In addition, Cedar Rapids fibrinogen and fibrin displayed delayed plasmin lysis rates. Compared with normal fibrinogen, platelet aggregation or platelet fibrinogen receptor clustering was defective in the presence of fibrinogen Cedar Rapids. Most subjects with gammaR275 mutations do not experience clinical thrombotic disorders, suggesting that the combination of a factor v Leiden defect and a gammaR275C dysfibrinogenemia predisposes to thromboembolic disease.- - - - - - - - - - ranking = 0.5keywords = thromboembolism (Clic here for more details about this article) |
3/33. Accumulation of low molecular mass heparin during prophylactic treatment in pregnancy.A history of thromboembolism is associated with an increased risk of new thromboembolic events during pregnancy. Prophylaxis with heparin during pregnancy implicates long-term treatment with daily injections with either unfractionated heparin (UFH) or low molecular mass heparin (LMMH). Prolonged treatment with heparin may result in endothelial absorption and drug accumulation. In order to test this hypothesis, anti-FXa activity during pregnancy was measured in four women allergic to conventional UFH, who were treated with LMMH (dalteparin; Pharmacia). It was found that, at the commencement of treatment, it took more than 8 days to reach a steady maximum peak value, located 3 h after the given dose. One daily dosage of 5,000 IU anti-Xa resulted in a measurable level of FXa for 24 h in pregnancy week 40, compared with 17h at pregnancy week 37. The implications of an elevated anti-FXa activity during pregnancy, especially during the third trimester and at partus, are discussed. We present a reduced dose regime near term and during delivery.- - - - - - - - - - ranking = 0.5keywords = thromboembolism (Clic here for more details about this article) |
4/33. Clinical study of venous thromboembolism during pregnancy and puerperium.We encountered 16 cases of venous thromboembolism (VTE) in women during pregnancy and/or puerperium over the past 15 years at our perinatal center, representing 0.14% of all patients who delivered babies. The present study was undertaken to analyze the risk factors, clinical course and outcomes in these 16 cases. The ages of the patients varied from 29 to 39 years. Four women had pulmonary embolism (PE), 3 of which after caesarean section (C/S) at 35 to 40 weeks, and one case after ovarian cystectomy at 13 weeks of gestation. Twelve cases had deep venous thrombosis (DVT), 4 of which during pregnancy, and the remaining 8 cases after C/S. Four patients who had DVT during a normal course of pregnancy had severe thrombophilia: antiphospholipid antibody syndrome, a history of thrombosis and antithrombin (AT) deficiency. They were treated with heparin with or without AT and had healthy babies via successful vaginal deliveries. The common risk factors in 3 cases of PE with C/S was prolonged bed rest due to threatened premature delivery with total placenta previa, uterine myoma and ehlers-danlos syndrome. Other risk factors were massive bleeding, and positive lupus anticoagulant. However, the case of the ovarian cystectomy had only one risk factor, which was obesity. This patient died but the remaining patients recovered with treatment. Because of the low incidence of thrombosis in the Japanese population, prophylactic anticoagulant therapy has not routinely been given to patients undergoing obstetrical operations. However, proper management including prophylactic anticoagulant therapy might be considered for risk patients, depending on the risk factors.- - - - - - - - - - ranking = 2.5keywords = thromboembolism (Clic here for more details about this article) |
5/33. Bilateral jugular venous thromboembolism and pulmonary emboli in a patient with severe ovarian hyperstimulation syndrome.We report here a case of severe ovarian hyperstimulation syndrome with massive ascites in a 25-year-old woman with a history of primary infertility after an IVF-ET cycle. At the 9th gestational week she presented with neck pain and dyspnea and duplex Doppler sonographic examination of the neck veins revealed bilateral jugular venous thrombosis. Despite prompt administration of low-molecular weight heparin, pulmonary emboli developed a few days later.- - - - - - - - - - ranking = 2keywords = thromboembolism (Clic here for more details about this article) |
6/33. Protected iliofemoral venous thrombectomy in a pregnant woman with pulmonary embolism and ischemic venous thrombosis.Although thromboembolism is uncommon during pregnancy and the postpartum period, physicians should be alert to the possibility because the complications, such as pulmonary embolism, are often life threatening. pregnant women who present with thromboembolic occlusion are particularly difficult to treat because thrombolysis is hazardous to the fetus and surgical intervention by any of several approaches is controversial. A 22-year-old woman, in her 11th week of gestation, experienced an episode of pulmonary embolism and severe ischemic venous thrombosis of the left lower extremity The cause was determined to be a severe protein s deficiency in combination with compression of the left iliac vein by the enlarged uterus. The patient underwent emergency insertion of a retrievable vena cava filter and surgical iliofemoral venous thrombectomy with concomitant creation of a temporary femoral arteriovenous fistula. The inferior vena cava filter was inserted before the venous thrombectomy to prevent pulmonary embolism from clots dislodged during thrombectomy When the filter was removed, medium-sized clots were found trapped in its coils, indicating the effectiveness of this approach. The operation resolved the severe ischemic venous thrombosis of the left leg, and the patency of the iliac vein was maintained throughout the pregnancy without embolic recurrence. At full term, the woman spontaneously delivered an 8-lb, 6-oz, healthy male infant.- - - - - - - - - - ranking = 0.5keywords = thromboembolism (Clic here for more details about this article) |
7/33. Anticoagulation during pregnancy.Anticoagulation of a pregnant woman is a complex issue for both the treating physician and the patient. In patients with mechanical prosthetic valves, long-term anticoagulation is mandatory to prevent thromboembolic complications; and in those with thrombophilic disorders and history of thromboembolism, anticoagulation is strongly indicated. With an increase in the number of patients with prosthetic heart valves, as well as the increase in maternal age, the issue of anticoagulation has become a very important one. Despite the widespread use of warfarin and unfractionated heparin during pregnancy, the optimal use of anticoagulants during pregnancy remains controversial because of a lack of appropriate prospective randomized clinical trials. In fact, even retrospective data on heparin provide miserably inadequate information for those making a decision on the correct dosing regimen. More recently, low molecular weight heparin has been proposed as a safer method of anticoagulation. This review summarizes current data and recommendations on anticoagulation during pregnancy.- - - - - - - - - - ranking = 0.5keywords = thromboembolism (Clic here for more details about this article) |
8/33. A case of pregnancy with a history of paradoxical brain embolism.brain embolisms in younger persons are rare but are often caused by a paradoxical embolism, the embolic entry of a venous thrombus into the systemic circulation through a right-to-left shunt. A 27-year-old pregnant woman presented with hemiplegia that had been treated with an antiplatelet agent since the occurrence of a paradoxical brain embolism via the pulmonary arteriovenous fistula. A tendency of hypercoagulation is generally observed during pregnancy, so a patient with this condition has a strong risk factor for venous thromboembolism during pregnancy and even more so for arterial thromboembolism under the intense strain of labor, which is much stronger than that of the valsalva maneuver. This case had been controlled well with an antiplatelet agent and an anticoagulant while the levels of coagulation and fibrinolytic factors were monitored and was followed by a successful pregnancy outcome.- - - - - - - - - - ranking = 1keywords = thromboembolism (Clic here for more details about this article) |
9/33. Possibilities of using vena cava filters in pregnant women with venous thromboembolism. case reports.Two cases of venous thromboembolism (VTE) (26th week and 35th week of pregnancy) are described. The standard anticoagulation therapy (Fraxiparine) with vena cava (IVC) filter insertion was applied with successful result and uneventful post partial period. The indications of IVC filters (permanent x retrievable x temporary) and timing of insertion and/or extraction are discussed. IVC filters are an effective and safe method in the prophylaxis and therapy of VTE in pregnancy. This method is justified to be used for a defined group of high-risk patients where benefit predominates potential complications.- - - - - - - - - - ranking = 2.5keywords = thromboembolism (Clic here for more details about this article) |
10/33. Bilateral internal jugular venous thrombosis following successful assisted conception in the absence of ovarian hyperstimulation syndrome.The majority of the venous thromboembolic events seen in patient following gonadotropin administration were associated with the development of ovarian hyperstimulation syndrome (OHSS). However, in this case report, a 29-year-old woman that conceived by controlled ovarian hyperstimulation, intracytoplasmic sperm injection and subsequent embryo transfer without conjunction of OHSS was described. Bilateral jugular venous thrombi were detected by duplex Doppler in the 8th week of pregnancy when she was admitted to the emergency room for difficulty in swallowing and bilateral neck pain. She had unremarkable history and negative results for thrombophilia screening. Full anticoagulation with intravenous heparin was initiated and continued subcutaneously throughout pregnancy. She delivered two healthy babies at 36 weeks of pregnancy. venous thromboembolism should be taken in account in patients undergoing gonadotropin administration for assisted conception with the complaint of extremity pain regardless of having risk factors for thromboembolism.- - - - - - - - - - ranking = 1keywords = thromboembolism (Clic here for more details about this article) |
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