Odegaard Silje, Saether Elisabeth, Steen Petter Andreas, Wik Lars
University of Oslo, Division Ulleval University Hospital, Norway.
Resuscitation. 2006 Dec;71(3):335-40. doi: 10.1016/j.resuscitation.2006.05.012. Epub 2006 Oct 27.
The new CPR guidelines emphasise chest compression depth and have increased the compression:ventilation ratio to cause less time intervals without chest compressions. How this change may influence the quality of chest compressions is not documented. Sixty-eight volunteers among travellers at Oslo international airport and a senior citizen centre performed 5 min of CPR on a manikin with compression:ventilation ratios 15:2, 30:2 or continuous chest compressions. Median age was 37.5 years (range 15-87), 59% were men, and 71% reported CPR training median 8 years (3-15) previously. Three of 22, 4 of 23 and 3 of 23 subjects in the 15:2, 30:2 and continuous compressions groups respectively stopped before 5 min had passed. Mean compression depth was 41 +/- 11, 45 +/- 8 and 30 +/- 8 mm, respectively. Depth was reduced as a function of time in the continuous compression group. Number of compressions per minute was 40 +/- 9, 43 +/- 14 and 73 +/- 24 and percent no flow time 49 +/- 13%, 38 +/- 20% and 1 +/- 2%, respectively. In conclusion, continuous chest compressions without ventilations gave significantly more chest compressions per minute, but with decreased compression quality. No flow time for 30:2 was significantly less than for 15:2.
新的心肺复苏指南强调了胸外按压深度，并提高了按压与通气的比例，以减少无胸外按压的时间间隔。但这种变化如何影响胸外按压质量尚无文献记载。在奥斯陆国际机场的旅客和一个老年中心的68名志愿者对一个人体模型进行了5分钟的心肺复苏，按压与通气比例分别为15:2、30:2或持续胸外按压。中位年龄为37.5岁（范围15 - 87岁），59%为男性，71%报告曾接受心肺复苏培训，中位时间为8年（3 - 15年）。在15:2、30:2和持续按压组中，分别有22名受试者中的3名、23名受试者中的4名和23名受试者中的3名在5分钟结束前停止。平均按压深度分别为41±11、45±8和30±8毫米。在持续按压组中，深度随时间而降低。每分钟按压次数分别为40±9、43±14和73±24，无血流时间百分比分别为49±13%、38±20%和1±2%。总之，持续胸外按压而不进行通气每分钟的胸外按压次数明显更多，但按压质量下降。30:2的无血流时间明显少于15:2。
