Controlled progressive elevation rather than an optimal angle maximizes cerebral perfusion pressure during head up CPR in a swine model of cardiac arrest.

Controlled progressive elevation rather than an optimal angle maximizes cerebral perfusion pressure during head up CPR in a swine model of cardiac arrest.
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在心脏骤停猪模型中,控制的渐进式升高而不是最佳角度可在头部上升时脑灌注压力最大化。

DOI:
10.1016/j.resuscitation.2020.02.023
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发表时间:
2020-05
期刊:
影响因子:
6.5
通讯作者:
Lurie KG
Lurie KG
中科院分区:
医学2区
文献类型:
--
作者:
Moore JC;Salverda B;Lick M;Rojas-Salvador C;Segal N;Debaty G;Lurie KG

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在采用阻抗阈值装置(ITD)的主动压缩减压(ACD)心肺复苏(CPR)过程中,头部和胸部(HUP)的升高可使脑血流增加一倍,并增加脑灌注压(CerPP)。然而,HUP CPR的最佳角度尚不清楚。在研究A中,评估了不同的角度(20°,30°,40°),在麻醉猪模型中,在未经治疗的8分钟心室颤动后,每个角度随机分为ACD + ITD CPR 5分钟。在研究A的基础上,进行了研究B,其中动物随机分为2个序列:20°、30°、40°或40°、30°、20°,采用类似的方案。两项研究的主要终点均为CerPP。在研究A中,18头猪没有观察到最佳HUP角度。30°和40°的cerpp (mmHg, mean±SD)相等(44±22和47±26,p = 0.18)。然而,在CPR的最后5分钟进行40°HUP时,CerPP出现更高,提示序列效应。在研究B中,心肺复苏17分钟后,20°、30°、40°顺序的CerPP (mmHg)更高:60±17比33±18 (p = 0.035)。没有观察到最佳的HUP CPR角度。然而,在心肺复苏术中,控制头部和胸部的渐进式抬高比绝对角度或高度更有利于最大化CerPP。需要进一步的研究来确定HUP ACD + ITD CPR期间的最佳上升速率。
Elevation of the head and thorax (HUP) during cardiopulmonary resuscitation (CPR) has been shown to double brain blood flow with increased cerebral perfusion pressures (CerPP) after active compression-decompression (ACD) CPR with an impedance threshold device (ITD). However, the optimal angle for HUP CPR is unknown. In Study A, different angles were assessed (20°, 30°, 40°), each randomized over 5-min periods of ACD + ITD CPR, after 8 min of untreated ventricular fibrillation in an anesthetized swine model. Based upon Study A, Study B was performed, where animals were randomized to 1 of 2 sequences: 20°, 30°, 40° or 40°, 30°, 20° with a similar protocol. The primary endpoint was CerPP for both studies. In Study A, no optimal HUP angle was observed in 18 pigs. CerPPs for 30° and 40° (mmHg, mean ± SD) were equivalent (44 ± 22 and 47 ± 26, p = 0.18). However, CerPP appeared higher when 40° HUP was performed during the last 5-min of CPR, suggestive of a sequence effect. For Study B, after 17 min of CPR, CerPP (mmHg) were higher with the 20°, 30°, 40° sequence: 60 ± 17 versus 33 ± 18 (p = 0.035). No optimal HUP CPR angle was observed. However, controlled progressive elevation of the head and thorax during CPR is more beneficial than an absolute angle or height to maximize CerPP. Further studies are needed to determine the optimal rate of rise during HUP ACD + ITD CPR.
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