| abstract |
A method and device for providing ventillation gas to a patient during cardiopulmonary resuscitation, mechanically or manually. The device comprises: a gas source (35), a tracheal tube arranged in the trachea of a patient, a gas channel (24) in the tracheal tube, for supplying gas, such as oxygen, to the bronchi of the patient, a central channel (23) for connecting the bronchi to the atmosphere, a flow valve (37) for adjusting the flow rate of the gas supplied, and a switch valve for initiating and terminating the gas supply. The device is operated by a computer (30) over the following operational phases: phase one, in which the supply of gas is initiated for inhaling gas into the lungs, for supplying a predetermined amount of gas to the lungs, phase two, in which the compression of the thorax is performed, for providing a high compression pressure, phase three or 'chest compressed, gas on' phase, in which blood flows out from thorax to the aorta, phase four, in which the supply of gas is terminated, for exhaling gas out of the lungs, phase five, in which the de-compression of the thorax is performed, for lowering the pressure in the thorax to provide a decompression in which blood from vena cava replenishes the thorax, and phase six or 'chest decompressed, gas off for perfusion of the coronary vessels. |