| 摘要 |
<p>An oxygen supply device which feeds oxygen of optimum concentration to a patient without waste, eliminates sucking-in of expiration and provides little resistance to breathing and which can precisely adjust an oxygen concentration of inspiration between 21 and 100 % with oxygen of relatively small flowrate. A combination expiration and inspiration valve is disposed on an end (proximal end) of the oxygen supply device on a patient side so that expiration can be exhausted outside through a one-way flow valve (expiration valve), and an oxygen supply tube of small diameter having an opening near an inspiration valve in a gas storage pipe, of which an end (distal end) opposite to the patient is opened, is provided so that oxygen from the tube and a gas having a ratio of oxygen to air set by a gas in the gas storage pipe are made to flow in through a one-way flow valve (inspiration valve).</p> |
