Rapid Reversal of CNS-Depressant Drug Effect Prior to Brain Death Determination
试验速览
- 阶段
- 早期 1 期
- 状态
- 撤回
- 试验地点
- 1
- 主要终点
- Improved GCS scores or return of cerebral or brainstem functions in comatosed subjects
研究概览
简要总结
Current standard of care prior to determination of brain death in subjects with suspected anoxic brain injury is to exclude complicating medical conditions that may confound clinical assessment (such as severe electrolyte, acid base, endocrine or circulatory disturbance), achieve normothermia and normal systolic blood pressure over 100 mmHg (with or without vasopressor use), exclude the presence of neuromuscular blocking agents (with the presence of a train of 4 twitches with maximal ulnar nerve stimulation) as well as to exclude the presence of CNS depressant drug effects. At the present time the latter is done by history, drug screen and allowing enough time for paralytic and sedative drugs to be metabolized and cleared from the body. Clearance is calculated by using 5 times the drug's half-life assuming normal hepatic and renal functions. Half-life can also be prolonged in subjects who have been treated with induced hypothermia. Literature search revealed articles with general guidelines and approaches to brain death, but none addressed pharmacological reversal of sedative drugs
详细描述
Question of proposed study is whether a subject's comatose state is secondary to delayed clearance of a previously administered CNS depressant. By using pharmacologic reversal agents of commonly used benzodiazepines and opioids, the investigators aim to identify participants that may likely improve after complete clearance of the drugs from their system.
Prospective trial with enrollment of 30 subjects in 2 intensive care units at Palmetto Health Richland from January 1st 2019 to June 30th 2020. Research procedures will be performed in the intensive care setting. If participants had undergone targeted temperature management (33-36 degrees Celsius for 24 hours via intravascular or surface control methods, with or without sedation or neuromuscular blockade, followed by rewarming actively or passively at 0.25-0.5 degrees per hour over 8-12 hours to 37 degrees) investigators will wait 24 hours after rewarming prior to testing. End point is to evaluate if pharmacological reversal agents would result in improved GCS scores or return of cerebral or brainstem functions in some comatose subjects, which will be considered a positive test result.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Adults with cardiac arrest who may have completed targeted temperature management (hypothermia protocol) and have had no neurological recovery after 24 hours of rewarming will be enrolled. Subjects will have a suspected diagnosis of anoxic brain injury secondary to cardiac arrest, and seizures ruled out with an EEG. All subjects are expected to be unable to consent and consent will be obtained from their legal authorized representative.
排除标准
- •Spontaneous recovery of neurological functions, presence of seizures on EEG, individuals who are not yet adults, pregnant women and prisoners.
研究组 & 干预措施
Reversal drugs
Flumazenil and naloxone
干预措施: Flumazenil (Drug)
Reversal drugs
Flumazenil and naloxone
干预措施: Naloxone (Drug)
结局指标
主要结局
Improved GCS scores or return of cerebral or brainstem functions in comatosed subjects
时间窗: Within 30 minutes post treatment
Subjects will be observed closely and tested before and after intervention for any signs of cerebral or brainstem function (1-Response to pain stimulus with earlobe pinching, trapezius squeezing and sternal rub or other brain-originating movements, e.g. seizures, decerebrate or decorticate posturing. 2-Pupillary light reflex with bright light. 3-Corneal reflexes with the use of cotton swab or tissue paper. 4-Gag reflex with a tongue depressor looking for bilateral palatal elevation. 5-Cough with tracheal suctioning at the carinal level) and GCS re-evaluated
次要结局
未报告次要终点