Method for simulating elastic curve of human body thoracic cage when pressing heart outside pulmones anabiosis thorax

Abstract

The invention discloses a simulation method of an elastic curve in cardiopulmonary resuscitation external chest compression, which has the main content that: 1. adopting an unequal deformation juxtaposed linear compression spring group to simulate the non-linear elastic force of the thorax; 2. adopting a damper (a buffer, a reducer) to simulate the damping force of the thorax, and the average value (2.93Ns / cm) of the damping coefficient of the damper between 0 to 5cm being equal; 3. respectively installing and fixing the damper and two ends of the spring group on the front and back walls of a simulation thorax which simulate the thoracic walls of the human body to form a thoracic simulating mechanism. The method adopts the combination of the spring and buffing equipment among the similar methods for the first time, thus the hysteretic curve in the process of pressing and releasing is in line with the typical hysteretic curve of the thorax of the human body in published literatures, therefore pressing hand feeling which is closer to a real human body can be acquired in the simulating mechanism and the effects of practicing cardiopulmonary resuscitation external chest compression techniques on the mechanism can be improved.

Description

technical field [0001] The invention relates to simulating mechanics and models, in particular to a method for simulating the hysteresis curve of the force-sternal displacement relationship under cardiopulmonary resuscitation chest external heart compression. technical background [0002] Cardiopulmonary resuscitation Chest compression is one of the three key techniques of cardiopulmonary resuscitation. The recommended compression method in medicine is 80-100 times per minute, 4-5cm deep, and 1 / 3 below the sternum. For the training of cardiopulmonary resuscitation chest heart compression, a variety of cardiopulmonary resuscitation simulators have been developed at home and abroad. The cardiopulmonary resuscitation simulator simulates certain characteristics of the human body, and the simulation of the force-sternal displacement relationship of the human thorax during cardiopulmonary resuscitation chest compressions directly affects the simulated human's hand feeling (includi...

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Problems solved by technology

The main problems they have are: 1. The force-displacement relationship under static loading is linear, which is inconsistent with the nonlinear characteristics of the elastic force of the human thorax; 2. Due to the existence of friction and other factors under dynamic loading, the pressing and relaxation processes are slightly different. But there is no obvious damping phenomenon, which is inconsistent with the obvious damping of the human thorax; 3. The force of the existing cardiopulmonary resuscitation simulator human thorax is generally consistent in the compression process and relaxation process, which is the same as the human thoracic compression during cardiopulmonary resuscitation. It does not match the obvious hysteresis curve of the resistance of the relaxation process

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