Development and validation of an improved mechanical thorax for simulating cardiopulmonary resuscitation with adjustable chest stiffness and simulated blood

作者：Eichhorn Stefan^*; Spindler Johannes^*; Polski Marcin; Mendoza Alejandro; Schreiber Ulrich; Heller Michael; Deutsch Marcus Andre; Braun Christian; Lange Ruediger; Krane Markus

来源：Medical Engineering & Physics, 2017, 43: 64-70.

DOI：10.1016/j.medengphy.2017.02.005

• Mechanical thorax model
• Resuscitation
• Thorax stiffness
• Blood flow

Investigations of compressive frequency, duty cycle, or waveform during CPR are typically rooted in animal research or computer simulations. Our goal was to generate a mechanical model incorporating alternate stiffness settings and an integrated blood flow system, enabling defined, reproducible comparisons of CPR efficacy. Based on thoracic stiffness data measured in human cadavers, such a model was constructed using valve-controlled pneumatic pistons and an artificial heart. This model offers two realistic levels of chest elasticity, with a blood flow apparatus that reflects compressive depth and waveform changes. We conducted CPR at opposing levels of physiologic stiffness, using a LUCAS device, a motor-driven plunger, and a group of volunteers. In high-stiffness mode, blood flow generated by volunteers was significantly less after just 2 min of CPR, whereas flow generated by LUCAS device was superior by comparison. Optimal blood flow was obtained via motor-driven plunger, with trapezoidal waveform.

• 出版日期2017-5