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1、亚低温技术在心肺复苏中的应用Therapeutic hypothermia in post-resuscitation patients,上海交通大学医学院附属瑞金医院陆一鸣,提纲,心跳骤停的流行病学及其预后亚低温疗法和其作用机制亚低温治疗心跳骤停病人的循证学依据哪一种亚低温疗法最有效?教育、实施和科研方面的挑战,猝死病人死亡率近70%,心脏骤停的流行病学,400,000 骤停 / 每年在 U.S.A医院,3 / 4 门急诊,1 / 4 住院患者,出院时的存活率,1-5% 10-20%,只有 2%的幸存患者神经性功能良好,Mry Ann Peberdy, Joseph P Ornato,Hig
2、h quality post resuscitation care,Survival rates among those admitted vary from 0 60%!,低温治疗的分类,低温治疗作用机制,传统认为：低温主要通过降低葡萄糖和氧耗延缓代谢而起到保护作用,低温治疗作用机制的新观念,抗凋亡、Ca2+介导的蛋白水解作用和线粒体损伤稳定离子泵和抑制神经兴奋性级联反应抑制免疫和炎症反应抗自由基损伤降低血管渗透性和减轻脑水肿减轻细胞膜渗透性改变和细胞内酸中毒抑制脑内局部温度升高后的脑损害降低脑代谢,Bladder Temperature in the Normothermia and Hy
3、pothermia Groups. The T bars indicate the 75th percentile in the normothermia group and the 25th percentile in the hypothermia group. The target temperature in the hypothermia group was 32 to 34 , and the duration of cooling was 24 hours. Only patients with recorded temperatures were included in the
4、 analysis.,Cooling End,After 6 months: Rate of death (41%) in the hypothermia is 14% lower than in the normothermia group (39%).,欧洲多中心临床试验（ HACA trial),随机将275名患者分组为低温或常温两组 降温时间：使用体表降温降到34度耗时6.5个小时结果： 低体温 正常体温好的结果 55%39% p=0.009死亡率 41%55% p=0.02,每六个接受治疗的患者，有一个可救活！,Number needed to treat to achieve go
5、od neurological outcome in one extra patient:,6,Holzer M et al., Crit Care Med 2005; 33:414-8.,澳大利亚的研究,77名患者的随机临床试验使用冰袋冷却0.9度/小时 结果: 低体温 正常体温好结果 49%26% p=0.046死亡率51%68% P=NS,Preliminary evidence in patients with asystole/PEA,Polderman KH et al. Induced hypothermia improves neurological outcomein asy
6、stolic patients with out-of hospital cardiac arrest.Circulation 2003; 108: IV-581 abstract 2646,欧洲HART Study - ICY 在心脏骤停的多中心试验,心搏停跳后，ICY 导管亚低温治疗。前瞻性的，多中心研究对心搏停搏患者使用ICY导管进行可行性和安全性评估多中心参加: Henry Ford, Duke, University of Houston欧洲复苏理事会资助 30 多个中心参加，包括500名患者，结果在2005年9月阿姆斯特丹会议上公布。欧洲HACA 调查者将使用CoolGard 30
7、00和Icy 导管作为金标准降温疗法。,Before- and after comparison in 665 out-of hospital cardiac arrest in the Stavanger area (population 300 000) 2001-2003,Before- and after comparison in 665 out-of hospital cardiac arrest in the Stavanger area (population 300 000) 2001-2003,Cooling Procedure,introduce the cooling
8、device (Icy and CoolGard 3000; Alsius Corp),foley-catheter,24 h,target temperature at 33,rewarmed,0.5 /h,3637 ,Icy-catheter,Start up Kit,All patients in the database from August 1991 to November 2004 were screened. For outcome evaluation all patients who were cooled with endovascular cooling during
9、this period were evaluated. For evaluation of cooling rate we restricted the analysis to patients who received endovascular cooling exclusively.,Bladder temperature course. Median, 25th and 75th quartile of bladder temperature after return of spontaneous circulation in patients, who were exclusively
10、 cooled with the endovascular cooling device (n=56). Target temperature, 33C; cooling duration, 24 hours.,95 min 35.31.0,253 min 33 ,24 hr,388 min36 ,1.2 /hour,Adverse Event,Endovascular Cooling (n=62),Control (n=104),P,Complications During and After Endovascular Cooling Compared to Frequency-Matche
11、d Controls,Methods - Consecutive comatose survivors of cardiac arrest, who were either cooled for 24 hours to 33C with endovascular cooling or treated with standard postresuscitation therapy, were analyzed. Complication data were obtained by retrospective chart review.Results - Patients in the endov
12、ascular cooling group had 2-fold increased odds of survival (67/97 patients vs 466/941 patients; odds ratio 2.28, 95% CI, 1.45 to 3.57; P0.001). After adjustment for baseline imbalances the odds ratio was 1.96 (95% CI, 1.19 to 3.23; P=0.008). In the endovascular cooling group, 51/97 patients (53%) s
13、urvived with favorable neurology as compared with 320/941 (34%) in the control group (odds ratio 2.15, 95% CI, 1.38 to 3.35; P=0.0003; adjusted odds ratio 2.56, 1.57 to 4.17). There was no difference in the rate of complications except for bradycardia.Conclusion - Endovascular cooling improved survi
14、val and short-term neurological recovery compared with standard treatment in comatose adult survivors of cardiac arrest. Temperature control was effective and safe with this device.,An advisory statement by the Advanced Life Support Task Force of the International Liaison Committee on Resuscitation(
15、ILCOR includes AHA)(Published in Resuscitation, June 2003 and Circulation, July 2003),对于无知觉的具有自发循环的门急诊心脏骤停患者，如果出现最初室颤节律，则应该将该患者体温降到 32-34度达12-24小时。像这样的降温也对其它的节律性疾病或住院的心脏骤停患者有益。,ILCOR Recommendations,International Emergency Cardiac Care Guidelines （2005）,mild hypothermia may be beneficial to neurolog
16、ic outcome and is likely to be well tolerated without significant risk of complications. In a select subset of patients who were initially comatose but hemodynamically stable after a witnessed VF arrest of presumed cardiac etiology, active induction of hypothermia was beneficial. Thus, unconscious adult patients with ROSC after out-of-hospital cardiac arrest should be cooled to 32 to 34 for 12 to 24 hours when the initial rhythm was VF (Class IIa). Similar therapy may be beneficial for patients with non-VF arrest out of hospital or for in-hospital arrest (Class IIb).,
