Vnitr̆ní lékar̆ství
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Vnitr̆ní lékar̆ství · Mar 2009
Review[Cardiac surgery as a significant interference with a patient coagulation status].
Cardiac surgery has been advancing intensively in recent years. However, it is often forgotten that cardiac surgery interventions represent a significant interference with patient's coagulation status. ⋯ The overview provided suggests that cardiac surgery conducted with the support of extracorporeal circuit represents a significant interference with the coagulation status of the patient. Awareness of the above listed changes is necessary to secure correct post-operative management of coagulation disorders.
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Anticoagulant therapy is one of the most common forms of medical intervention. It is the mainstay of prevention and treatment of thrombotic events. Omission of adequate anticoagulant prophylaxis at least for moderate-risk and high-risk patients is a widely recognized medical error. ⋯ Whereas unfractionated heparin and warfarin, the oldest and most widely used anticoagulants, have specific antidotes for their anticoagulant effect, many of the newer agents (direct and indirect inhibitors of coagulation factors Xa and/or IIa) do not have specific antidotes to reverse their actions. The use of novel anticoagulants is further complicated by a lack of easily available laboratory tests to measure their levels and thereby optimize their benefit and safety in clinical practice. In this review, we evaluate the risk of bleeding associated with current anticoagulants, review the data available on current and experimental agents used for the reversal of anticoagulation, and provide recommendations for the management of major bleeding associated with anticoagulant therapy and for the management of asymptomatic overdosing of the anticoagulants.
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Vnitr̆ní lékar̆ství · Mar 2009
Review[Inferior vena cava filters in pulmonary embolism prevention].
Pulmonary embolism (PE) is the most serious sign of venous thromboembolism and the 3rd most frequent cause of cardiovascular death. Therapy with anticoagulants represents, among other measures, the mainstay of PE treatment. However, anticoagulant therapy does not prevent recurrence of pulmonary embolism in 3-20% of patients. ⋯ This was one of the causes of relatively high incidence of complications related to the use of these filters, particularly venous thromboses, as confirmed by so far the only randomised study PREPIC. Consequently, retrievable filters that are currently preferred have been developed. The authors also provide an overview of studies in progress, describe the process of implantation and describe own patient group.
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Vnitr̆ní lékar̆ství · Mar 2009
Review[Venous thromboembolism prophylaxis in orthopaedics and traumatology].
The paper formulates the following recommendations: 1. Patients with total hip or knee replacement should be prescribed higher prophylactic dose of low molecular weight heparin (LMWH) or fondaparinux or rivaroxaban or dabigatran, patients with proximal femur fracture should be prescribed higher prophylactic dose of LMWH or fondaparinux. Pharmacological prophylaxis should in patients with knee replacement be administered for at least 14 days and longer in patients with increased risk of venous thromboembolism (VTE). ⋯ Computer tomography (CT) or nuclear magnetic resonance imagining (NMRI) should be performed in patients with spinal injury with incomplete spinal lesion to exclude perispinal haematoma. Should haematoma occur, IPC should be used and CT or NMRI repeated after a few days; it is recommended to commence LMWH administration only when the haematoma had been stabilized. In case of persisting immobility, continuing LMWH or warfarin prophylaxis is recommended.
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Vnitr̆ní lékar̆ství · Mar 2009
Treatment of deep vein thrombosis with continuous intravenous infusion of LMWH in children--an alternative to subcutaneous application when needed.
Incidence of thrombosis is age dependent with the lowest risk in the childhood. Children mostly suffer from vein thrombosis. Incidence of thrombosis in children is only 0.07/10,000, but it increases among hospitalized children (3.5/10,000). ⋯ The difference in the outcomes of the therapy between both groups appears to be statistically significant (p = 0.041, nonparametric Mann-Whitney test). We have not noticed any severe adverse event of the treatment in any of our patients. Our results support the hypothesis that the treatment of DVT with continuous infusion of LMWH might be efficient and safe alternative to subcutaneous application in those children in whom we want to avoid subcutaneous administration from certain reasons.