The physiology of cardiopulmonary resuscitation (CPR)
The forces that drive coronary and cerebral perfusion, and ventilation of the lungs during cardiopulmonary resuscitation ( CPR ) differ substantially from normal circumstances. The purpose of CPR is to create large variations in intrathoracic pressure by compressing, decompressing and ventilating. These maneuvers result in arterial blood flowing through the pulmonary, coronary and cerebral circulation, as well as allowing for gas exchange in the lungs. A large number of experimental and observational studies have been conducted to optimize the effectiveness of CPR. Yet, there are fundamental gaps in knowledge, with some of the most critical components of current guidelines being based on observational data ( e.g compression rate and depth). With current strategies, compressions and ventilations can generate a cardiac output equivalent to 15-25% of normal output ( Duggal et al ). This, in conjunction with defibrillation, is sufficient to resuscitate 10-15% of out-of-hospital cardiac arrests (O…
About the author
Cuộc đời thì ngắn, mà nghề thì miên man;cơn bệnh phập phù;kinh nghiệm hiểm nguy, còn quyết định thì thật khó.Người thầy thuốc không phải chỉ chuẩn bị để tự mình làm đúng, mà còn khiến cho bệnh nhân, người đi theo và các yếu tố xung quanh hợp tác hài…