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

A cardiopulmonary resuscitation and elastic curve technology, applied in the field of simulated mechanics and models, can solve the problems of inconsistent nonlinear characteristics of human thoracic elastic force, inconsistent human thoracic damping, etc., and achieve the effect of improving the effect

Inactive Publication Date: 2008-11-12
SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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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

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

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Embodiment Construction

[0019] This method is slightly different in structure depending on the number of springs, but the basic method and design process are the same.

[0020] Taking the spring group composed of two springs as an example, the specific design method, process and structure are introduced. Because the chest compression depth of human cardiopulmonary resuscitation is 4.0-5.0cm, the maximum compression of the spring group is set to 6.0cm, and the free height difference between the two springs is 2.5cm. It is stipulated that the free height of 1# spring is 2.5 higher than that of 2# spring cm. Because the distance between the front and back walls of the adult thorax is usually 20.0-30.0cm, the total free height of the spring group is set to be <20.0cm.

[0021] First determine the stiffness of 1# spring and 2# spring respectively. figure 1 is a schematic diagram of the piecewise linear fitting elastic force curve (that is, the curve of formula [3]) used in the spring group design proces...

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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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Application Information

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IPC IPC(8): G09B23/28
Inventor 田丰谢新武孙秋明倪爱娟胡名玺刘长军刘圣军张彦军
Owner SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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