Aspirin sensitivity of platelet aggregation in diabetes mellitus.

Although aspirin is cardioprotective in high-risk populations, many with diabetes mellitus (DM) are unresponsive to these benefits. We questioned whether cardiovascular unresponsiveness might be demonstrated by lack of aspirin sensitivity to in vitro platelet functions especially in subjects with poorly controlled diabetes. Six women and 4 men (48+/-8 years [mean+/-S.

A multicenter clinical evaluation of the Clot Signature Analyzer.

Background: The Clot Signature Analyzer (CSA) was designed to assess global hemostasis as a screening assay using non-anticoagulated whole blood. Three different measurements are produced by the instrument: platelet hemostasis time (PHT), clot time (CT), and collagen-induced thrombus formation (CITF).

Objectives: The purpose of the present study was to determine normal ranges for these measurements and assess the performance of the CSA in patients with well-characterized hemostatic disorders and in normal subjects.

Recombinant factor VIIa: a universal hemostatic agent?

Recombinant factor VIIa (rVIIa) has proved effective for the treatment and prevention of hemorrhage in patients with inherited hemophilia A and B who develop inhibitors to factor VIII or IX, and patients with acquired hemophilia A. More recently, there is evidence that rVIIa may also be effective in the control of abnormal bleeding in a variety of other conditions, such as inherited factor VII deficiency, thrombocytopenia, Glanzmann's thrombasthenia, and liver disease. In some of the reports, rVIIa appeared to be effective in controlling massive hemorrhage in which there was no response to conventional measures.

Massive retroperitoneal pseudotumour in a patient with type 3 von Willebrand disease.

Formation of destructive haemorrhagic pseudocysts or pseudotumours thought to arise from unresolved, encapsulated haematomas is a well-recognized, rare complication of severe haemophilia A or B, and has been reported in a single patient with von Willebrand disease (vWD). We report a 41-year-old patient with type 3 vWD who underwent incomplete resection of a large retroperitoneal pseudocyst in 1995 and presented with a recurrent, extensive right abdominal and flank mass and signs and symptoms of large bowel obstruction. He required emergency partial colectomy for bowel ischaemia and removal of his right kidney, which was hydronephrotic due to prolonged ureteral obstruction by the pseudocyst.