诊断为肺栓塞的 Covid-19 中的低剂量替奈普酶
低剂量替奈普酶治疗 Covid-19 急性肺栓塞患者:一项随机、双盲、安慰剂对照试验
- 在 COVID-19 肺损伤患者的管理和与弥散性血管内凝血 (DIC) 相符的实验室图片方面存在知识差距。 迄今为止的临床数据支持 COVID-19 与促血栓形成状态有关,而这种状态不能简单地用更多危重病人的涌入来解释。
- 这些患者患有严重的呼吸衰竭;低氧血症和呼吸机依赖是主要问题;伴有呼吸衰竭的 ARDS 通常是死亡原因。 宏观和可能的微血管血栓栓塞事件是该人群的主要关注点。
- 当 DIC 与 COVID-19 相关时,它预示着预后非常差。
- 本研究将评估在诊断为 COVID-19 和急性中危 PE 的住院成人中,低剂量静脉推注替奈普酶 (TNK) 联合抗凝治疗与仅接受治疗性抗凝治疗的对照患者相比的临床疗效和安全性。
- 前瞻性、多中心、随机双臂试验,连续招募符合入组标准的患者。
- 该研究将产生证据表明低剂量 TNK 联合抗凝治疗对这些患者有益
研究概览
详细说明
这是一项前瞻性、双盲、安慰剂对照研究,以 2:1 的方式将符合入组标准的急性中危 PE 患者随机分配到干预 (TNK) 组和安慰剂组中。 最多将有 6 个站点。 在 18 名患者入组后,将由独立的数据和安全监测委员会进行安全评估,如果出现安全问题,将由研究人员进行考虑和讨论。 计划样本量为 45 名患者(30 名治疗组和 15 名对照组)。 受试者将在住院期间每天接受评估。 出院的受试者将被要求在第 14 天和第 30 天(电话/远程医疗、诊所或住院病房)参加研究访问。
该研究的总体目标是评估在诊断为 COVID-19 感染和急性中危 PE 的住院成人中,与安慰剂和治疗性抗凝相比,IV 推注替奈普酶 (TNK) 和治疗性抗凝的临床疗效和安全性。
在执行任何与研究相关的程序(包括筛选评估)之前,必须获得参与研究的书面知情同意书。 已登记患者和随后未登记患者的知情同意书将保存在研究地点。
在获得知情同意后,将完成筛选评估以确认患者是否有资格参与研究。 筛查访问将包括病史、身体检查和生命体征。 护理标准 (SOC)。 实验室将被审查。 这些可能包括 INR、aPTT、PT(如果患者目前正在服用抗凝剂)、CBC with diff、综合化学组、D-二聚体和铁蛋白。 将记录 SARS-CoV-2 的结果。 如果受试者处于育龄期且未对 SOC 进行妊娠试验,则将进行尿妊娠试验。 将审查心电图和 CTA。
如果确定患者符合条件,研究地点将获得患者的病历号/唯一患者识别号,并随机确定介入治疗 (TNK) 或安慰剂的治疗分配。 根据计算机生成的使用随机大小排列块的随机化时间表,患者将以 2:1 的方式分配到介入组和安慰剂组。 块大小不会被公开以确保隐蔽性。 总共将招募 30 名 TNK 受试者和 15 名安慰剂对照。
在给予研究药物/安慰剂之前,将对以下实验室进行 CBC 检测,包括 diff、综合代谢组、CRP、铁蛋白、IL-6、纤维蛋白原、D-二聚体、PT/PTT、LDH、乳酸、肌钙蛋白、肌酐激酶、和血栓弹力图 (TEG)。 将获得生命体征和超声心动图。 将计算休克指数,然后开始输液。
在输注后 10 分钟(+ 5 分钟)内,将收集第二份 TEG。 输注后 6 小时,将计算第二个休克指数。 推注后 24+/- 6 小时,将进行身体检查,收集生命体征,进行超声心动图检查,并进行 D-二聚体、CRP、IL-6 和铁蛋白检测。 TEG 将是 24 小时实验室的可选补充。 日常安全实验室将包括 CBC 和化学面板。 SOC 实验室结果将从图表中收集。
患者将在第 14 天 +/- 2 天和第 30 天 +/- 4 天进行随访。 这些访问可以通过电视访问或亲自进行。 将收集有关不良事件、生命体征和新伴随药物的数据。 如果亲自访问,将获得安全实验室。
研究类型
注册 (实际的)
阶段
- 第四阶段
联系人和位置
学习地点
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California
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Los Angeles、California、美国、90048
- Cedars-Sinai Medical Center
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
纳入标准:
- 男性或未怀孕的成年女性年龄≥18 岁,但入组时年龄 < 75 岁。
- 实验室确认的 SARS-CoV-2 感染,通过 PCR 或其他商业或公共卫生检测在随机化前 < 28 天的任何标本中确定,或被调查的 COVID-19 患者 (PUI) 伴肺部浸润和铁蛋白和 CRP 升高等级。
急性中危肺栓塞定义为:
- 通过诊断成像(计算机断层扫描血管造影、通气-灌注扫描或有创肺血管造影)证实存在急性肺栓塞,并且
- 存在至少一个叶动脉受累的血块负荷或双侧至少有节段性分支或单侧至少有多个节段性分支的血块。
- 受试者(或合法授权代表)在执行任何研究程序之前提供书面知情同意书。
- 根据研究者的判断,患者有能力遵守研究方案,并且理解并同意遵守计划的 TNK 推注与安慰剂。
排除标准:
- 预计在 72 小时内转移到另一家医院(非研究中心)
- 对 TNK 过敏或禁忌症
- 全身抗凝的禁忌证
- 活动性出血
- 已知的显着出血风险(尽管最近接触阿司匹林或任何其他抗血小板治疗不是排除标准)。 虽然没有特定的血红蛋白临界值用于入组,但研究人员将评估 Hgb 的严重性/稳定性并排除被认为不合适的患者。
- 过去 3 周内主要 GI 或 GU 出血
- 出血性中风史
- 最近 90 天内有急性缺血性中风病史
- 高风险(大量)急性肺栓塞(肺栓塞伴有低血压(收缩压 < 90 毫米汞柱 > 15 分钟)。
- 与晕厥和任何程度的头部创伤相关的 PE
- PE 符合中度风险 PE 的标准,因此适合入组,但有恶化的临床证据,因此研究者认为患者不适合入组。
- 过去 7 天内使用过溶栓剂
- 过去 30 天内进行过肺血栓切除术
- 未控制的高血压定义为随机分组时收缩压 >180 mm Hg 和/或舒张压 >110 mm Hg
- 严重 ARDS(P/F 比率 < 100)
- 血小板计数低于 80,000/mm3
- 已知的遗传性或获得性出血素质、凝血因子缺乏症;近期口服抗凝治疗且 INR >1.7
- 过去 5 天内在不可压缩部位进行过动脉穿刺
- 先前的脑部手术
- 前 2 周内有严重外伤
- 前 2 周内进行过大手术
- 过去 5 年内脑恶性肿瘤/转移瘤、脑肿瘤
- 脑动静脉畸形或随时破裂的动脉瘤
- 急性心肌梗死或过去3周内有心肌梗死病史或住院期间心脏骤停
- 心脏压塞
- 过去7天腰椎穿刺
- 已知的腹部或胸部动脉瘤
- 需要透析的急性或慢性肾功能衰竭
- 慢性肝功能衰竭(肝功能试验急性升高不是排除标准)
- 进入研究时的细菌性心内膜炎
- COVID-19 院前课程或住院期间癫痫发作
- 目前在ECMO
- 过去 30 天内怀孕、哺乳或分娩
- 研究者认为因合并心肺疾病而病情危重且不太可能受益的患者。
- 如果开始研究治疗,研究者认为会增加患者风险的任何其他情况
- 以前参加过这项研究
学习计划
研究是如何设计的?
设计细节
- 主要用途:治疗
- 分配:随机化
- 介入模型:平行线
- 屏蔽:四人间
武器和干预
参与者组/臂 |
干预/治疗 |
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实验性的:低剂量 TNKase 和护理标准抗凝
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替奈普酶 (0.25 mg/kg) 由 Genentech, Inc. 提供,为无菌冻干粉,用 10mL 无菌水稀释。
其他名称:
所有参与者还必须接受标准的抗凝治疗。
其他名称:
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ACTIVE_COMPARATOR:安慰剂和护理标准 抗凝
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所有参与者还必须接受标准的抗凝治疗。
其他名称:
与 Genentech, Inc. 提供的安慰剂相匹配,为无菌冻干粉,用 10mL 无菌水稀释。
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研究衡量的是什么?
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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TNK/安慰剂推注后 6 小时休克指数(定义为心率除以收缩压)的百分比改善。
大体时间:TNK/安慰剂输注后 6 小时
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例如,患者开始时心率可能为 100 次/分钟,收缩压为 100 毫米汞柱(休克指数 = 1),治疗后心率可能有所改善,心率为 90 次/分钟,收缩压血压为 110 毫米汞柱(休克指数为 0.81),改善了 19%。
健康患者的正常休克指数在 0.5 到 0.7 之间。
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TNK/安慰剂输注后 6 小时
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
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1. 给予 TNK/安慰剂后 24 小时的临床状态基于 7 点量表。
大体时间:TNK/安慰剂输注后 24 +/- 6 小时。
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使用顺序量表评估患者状态将在基线时记录,并在住院期间每天早上一次。 1 级:出院(或“准备出院”环境空气或 < 2L 供应 O2) 2 级:非 ICU 医院病房(或“准备入院病房”)不需要供应 O2 3 级:非 ICU 医院病房(或“准备入院”)需要氧气供应 4 级。ICU 或非 ICU,需要无创通气或高流量 O2 5 级。ICU,需要插管和机械通气 6 级:ICU,需要 ECMO 或机械通气和额外的器官支持(例如 升压药、肾脏替代疗法) 7 级:死亡 |
TNK/安慰剂输注后 24 +/- 6 小时。
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合作者和调查者
合作者
调查人员
- 首席研究员:Victor E Tapson, MD、Cedars-Sinai Medical Center
出版物和有用的链接
一般刊物
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有用的网址
- CDC Stroke Facts
- Stroke Early Management Guidelines
- Practical guidance for the prevention of thrombosis and management of coagulopathy and disseminated intravascular coagulation of patients infected with COVID-19
- TEG max clot strength is consistently elevated and may be predictive of COVID-19 status at the time of ICU admission
- A randomized trial of anticoagulation strategies in COVID-19
- Preventing COVID-19 complications with low- and high-dose anticoagulation (COVID-HEP)
- Trial evaluating efficacy and safety of anticoagulation in patients with COVID-19 infection, nested in the Corimmuno-19 Cohort (CORIMMUNO-COAG)
- Generalized odds ratios for ordinal data
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