warfarin and Abruptio-Placentae

For haemostatic and circulatory reasons pregnancy is associated with an about 6-fold relative increase of thrombotic risk which is further raised by additional risk factors, such as history of thrombosis or acquired and hereditary thrombophilia, respectively. Recently, the thrombophilias have been revealed as risk factors for severe preeclampsia, abruptio placentae, fetal growth retardation, abortion and still birth as well. Thus, there are several situations in which the question for the need of antithrombotic medication is raised in a pregnant woman, either for therapy of acute thromboembolism or for prophylaxis of thrombosis and obstetrical complications, respectively. While acute thromboembolism has to be treated in every case, indication for prophylaxis has to be weighed in the light of the individual risk profile of the pregnant woman and the potential side effects and inconvenience of the medication. The first part of this article deals with the pregnancy related problems of coumarins, heparins and aspirin and demonstrates that the low molecular weight heparins are the anticoagulants of choice for most indications in pregnancy. The second part of this overview shows in which specific situations and how the antithrombotic medications mentioned above are used in pregnancy.

Topics: Abnormalities, Drug-Induced; Abortion, Spontaneous; Abruptio Placentae; Administration, Oral; Adult; Anticoagulants; Aspirin; Blood Coagulation Tests; Coumarins; Female; Fetal Death; Fetal Growth Retardation; Fibrinolytic Agents; Heart Valve Prosthesis; Heparin; Heparin, Low-Molecular-Weight; Humans; Infant, Newborn; Platelet Aggregation Inhibitors; Pre-Eclampsia; Pregnancy; Pregnancy Complications, Cardiovascular; Puerperal Disorders; Pulmonary Embolism; Risk Factors; Thrombocytopenia; Thrombophilia; Thrombosis; Warfarin

Topics: Abruptio Placentae; Adult; Anticoagulants; Enoxaparin; Female; Fibrinogens, Abnormal; Heparin; Humans; Intracranial Thrombosis; Pregnancy; Puerperal Disorders; Stillbirth; Warfarin

Hypothetical clinical cases were used to investigate transfusion-related decision-making. Three red cell, three fresh frozen plasma (FFP) and three albumin transfusion decision cases were administered by questionnaire to 228 medical staff. The transfusion decision triggers were identified and comparisons made between resident and specialist groups and between Melbourne and Sydney participants. Factors important in red cell transfusion decisions included haemoglobin, symptoms of anaemia, presence of co-morbidities or surgery, gender, period of hospitalisation and the degree of documented blood loss. FFP administration was influenced by an abnormal coagulation test, the presence of co-morbidities and by the number of red cell units transfused. The administration of albumin, concentrated or 5% SPPS, was influenced by the period of hospitalisation and clinical circumstances such as a falling urine output postoperatively, and by the presence of hypotensive complications. Different transfusion responses were noted: resident staff transfused red cells and FFP earlier than specialists; Sydney specialists were more conservative of red cell transfusion; Melbourne specialists more conservative of FFP administration and surgeons were four times more likely to transfuse patients than physicians or anesthetists at certain haemoglobin values.

Topics: Abruptio Placentae; Adult; Aged; Ascites; Blood Component Transfusion; Blood Loss, Surgical; Blood Transfusion; Cesarean Section; Colonic Neoplasms; Decision Making; Disseminated Intravascular Coagulation; Epistaxis; Female; Humans; Hypoproteinemia; Male; Medical Staff, Hospital; Middle Aged; Peptic Ulcer Hemorrhage; Plasma; Pregnancy; Serum Albumin; Sex Factors; Warfarin; Wounds and Injuries