Schmidt P, Snowden T
San Diego Regional Public Safety Training Institute, California 92126, USA.
J Emerg Med. 1999 Sep-Oct;17(5):777-82. doi: 10.1016/s0736-4679(99)00083-9.
To study the effects of positional restraint on heart rate and oxygen saturation during recovery, a crossover experimental design with prospective control trials was used in a two-phase study. In phase 1, serial resting oxygen saturations (RO1) measured on 18 volunteers were compared with those measured in the seated unrestrained (SU1) and the hogtie (HT) positions after submaximal cycle exercise. Additionally, serial heart rates were compared postexercise on subjects in the SU1 and HT positions. In phase 2, resting oxygen saturations (RO2) were compared with those measured in the seated unrestrained (SU2) position and an alternate maximal restraint (MR) position after a simulated pursuit and struggle scenario. No statistical differences were found between SU1 and HT recovery heart rates in phase 1. Small oxygen saturation differences (1%) were found in both phase 1 and phase 2 between resting (RO1 and RO2) positions and those measured in the seated unrestrained (SUI), hogtie (HT), and maximal restraint (MR) positions. Oxygen saturations taken during a 5-min period in each of the three situations in phase 1 (RO1, SU1, and HT) were averaged, yielding 97.8, 98.0, and 97.6%, respectively. In phase 2, mean oxygen saturations were 98.0, 97.4, and 96.8% for RO2, SU2, and MR, respectively. In our study population, the use of hogtie and an alternate maximal restraint method did not result in any clinical restrictions in heart rate or oxygen saturation recoveries.
为研究恢复过程中体位限制对心率和血氧饱和度的影响，在一项两阶段研究中采用了前瞻性对照试验的交叉实验设计。在第1阶段，比较了18名志愿者测量的系列静息血氧饱和度（RO1）与次最大强度自行车运动后在无约束坐位（SU1）和捆绑体位（HT）测量的血氧饱和度。此外，还比较了SU1和HT体位受试者运动后的系列心率。在第2阶段，比较了模拟追捕和挣扎场景后的静息血氧饱和度（RO2）与在无约束坐位（SU2）和另一种最大限制体位（MR）测量的血氧饱和度。在第1阶段，SU1和HT恢复心率之间未发现统计学差异。在第1阶段和第2阶段，静息（RO1和RO2）体位与在无约束坐位（SUI）、捆绑体位（HT）和最大限制体位（MR）测量的血氧饱和度之间均发现了较小的血氧饱和度差异（1%）。对第1阶段三种情况（RO1、SU1和HT）中每种情况5分钟内测得的血氧饱和度进行平均，分别得出97.8%、98.0%和97.6%。在第2阶段，RO2、SU2和MR的平均血氧饱和度分别为98.0%、97.4%和96.8%。在我们的研究人群中，使用捆绑体位和另一种最大限制方法并未导致心率或血氧饱和度恢复出现任何临床限制。
