Whole Blood Clot Stability and Thrombin Generating Capacity Following Treatment With Bypassing Agents (BPA) With and Without and Tranexamic Acid (TXA) in Haemophilia A Patients With inhibitor-an In-vivo Prospective Crossover Study
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 发起方
- 入组人数
- 6
- 试验地点
- 1
- 主要终点
- Clot stability and thrombin generation capacity following treatment with bypassing agents with and without tranexamic acid.
研究概览
简要总结
Activated prothrombin complex concentrate (aPCC) and recombinant activated factor VII (rFVIIa) are the only two drugs that are available to treat bleeds in haemophilia A patients with high titer inhibitors. However, management of bleeds in these patients can be challenging due to variation in response and lack of standardized methods to monitor the effect. We hypothesized that significant increase in whole blood clot stability could be achieved when tranexamic acid was given concomitantly with bypassing-agents while thrombin generation remains unaffected. In this prospective crossover study the effect of aPCC and rFVIIa with and without TXA on clot stability and thrombin generation capacity (ETP) were studied, using thromboelastography (ROTEM) and thrombin generation assay (TGA), respectively. In addition, the risk of thrombosis and disseminated intravascular coagulation (DIC) was assessed.
详细描述
Patients receive the first day aPCC (75IU/kg) and aPCC in addition to TXA (20mg/kg orally) the second day. After a 14 days washout period they crosse over using rFVIIa (90 µg/kg) otherwise the same experimental setup. Blood sampling is performed at baseline, 15, 30, 60, 120, 180 and 240 minutes post-treatment.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Haemophilia patients with high titer inhibitors or high-responding inhibitors, aged between 18-65 and no history of aspirin or NSAID use within the last 14 days were eligible for the study.
排除标准
- •Patients with renal failure, liver disease, infected with immune deficiency virus (HIV), platelet count <150x109/L, acquired haemophilia, ongoing bleeding, hypersensitivity to TXA or a history of arterial or venous thrombosis were excluded from the study.
研究组 & 干预措施
aPCC, aPCC + TXA
aPCC 75IU/kg i.v aPCC 75IU/kg i.v +TXA 20mg/kg
干预措施: aPCC, aPCC + TXA (Drug)
aPCC, aPCC + TXA
aPCC 75IU/kg i.v aPCC 75IU/kg i.v +TXA 20mg/kg
干预措施: rFVIIa, rFVIIa + TXA (Drug)
rFVIIa, rFVIIa + TXA
rFVIIa 90 µg/kg i.v rFVIIa 90 µg/kg i.v + TXA 20 mg/kg
干预措施: aPCC, aPCC + TXA (Drug)
rFVIIa, rFVIIa + TXA
rFVIIa 90 µg/kg i.v rFVIIa 90 µg/kg i.v + TXA 20 mg/kg
干预措施: rFVIIa, rFVIIa + TXA (Drug)
结局指标
主要结局
Clot stability and thrombin generation capacity following treatment with bypassing agents with and without tranexamic acid.
时间窗: 2 years
MCF (maximum clot formation/mm x 100-1), AUC (area under the elasticity curve AUC, mm• 100 s-1) were used as the primary outcome measures for evaluating clot stability and (ETP) the coagulable state.
次要结局
- DIC or thrombosis events associated with different treatment regimens.(2 years)
研究者
Pål Andre Holme
MD PhD
Oslo University Hospital