2009年12月1日 · Patients with isolated prolonged PTT or with normal PTT, PT, platelet count, and fibrinogen level in the presence of bleeding signs or symptoms should receive VWF:Ag, …

Initial tests for a bleeding disorder rule out more common causes of bleeding. These tests include complete blood and platelet counts, PTT, PT, and possibly fibrinogen level or thrombin time....

2023年8月14日 · Von Willebrand Disease (VWD) PTT can be normal or elevated depending on the severity of the disease. Von Willebrand disease is an autosomal dominant deficiency in …

血管性血友病（VWD）是一种遗传性的血管性血友病因子 数量缺陷或功能异常，可导致血小板功能障碍。 出血倾向通常是轻微的。 筛选试验通常显示血小板计数正常，可能还显示部分凝血 …

Von Willebrand disease (VWD) is a hereditary quantitative deficiency or functional abnormality of von Willebrand factor, which causes platelet dysfunction. Bleeding tendency is usually mild. …

2022年1月19日 · 第一次去就醫，醫師驗出來血小板功能不好，VWF功能也低.

2015年3月26日 · Clinically, the greatest benefit of the PTT is the ability to screen for non-VWD causes of bleeding that would prolong clotting times such as factor XI deficiency.

The PTT becomes prolonged if factor VIII is significantly decreased due to low vWF. Type 2N vWD is an autosomal recessive disorder caused by a mutation in vWF which leads to …

2020年7月9日 · Labs show normal PT, PTT, and platelet count.

Obtain VWF:Ag and VWF:GPIbM assays and consider administering a BAT to document severity of bleeding. The panel recommends against relying on a bleeding assessment tool (BAT) to …