Tsitlik J E, Weisfeldt M L, Chandra N, Effron M B, Halperin H R, Levin H R
Crit Care Med. 1983 Sep;11(9):685-92. doi: 10.1097/00003246-198309000-00003.
Sternal displacement during CPR was measured in 11 adults and 2 manikins (Recording Resusci Anne) while the chest was compressed with variable maximum pulse compression force at a rate of 60/min with compression duration of 0.5-0.6 sec. In 10 patients, the pulsatile sternal elastic characteristic can be satisfactorily described with a 2nd degree polynomial F = beta Ds + gamma D2s, where beta = 54.9 +/- 29.4 (mean +/- SD) N/cm is the pulsatile initial elasticity and gamma = 10.8 +/- 4.1 N/cm2 is the posterior resiliency. The sternal characteristics of manikins were linear F = kDs with high elasticity constants, k = 131 and 142 N/cm. Therefore, the manikins tested differ significantly in elasticity characteristics from the human chest during resuscitation. In general, the manikin: (1) has markedly greater stiffness at the onset of compression, and (2) maintains a linear stiffness throughout the usual range of displacement, rather than becoming stiffer with greater chest displacement.
在对11名成年人和2个复苏安妮模型（Recording Resusci Anne）进行心肺复苏（CPR）时，测量了胸骨位移。胸部按压的最大脉冲压缩力可变，频率为60次/分钟，按压持续时间为0.5 - 0.6秒。在10名患者中，脉动胸骨弹性特征可用二次多项式F = βDs + γD²s令人满意地描述，其中β = 54.9 ± 29.4（均值 ± 标准差）N/cm是脉动初始弹性，γ = 10.8 ± 4.1 N/cm²是后弹性。模型的胸骨特征呈线性F = kDs，弹性常数较高，k = 131和142 N/cm。因此，所测试的模型在复苏过程中的弹性特征与人体胸部有显著差异。一般来说，模型：（1）在按压开始时刚度明显更大，（2）在通常的位移范围内保持线性刚度，而不是随着胸部位移增大而变得更硬。
