| 摘要 |
<p>A throw-away apparatus for taking and holding breath samples is particularly appropriate for determining carbon monoxide and, therefore, indirectly carboxyhemoglobin in blood, and comprises an elongate hollow body (10) defining a chamber therein; an inlet at one end (16) of the body, the inlet defining a mouthpiece for the apparatus; an outlet at the end (14) of the body opposite the inlet; a valve orifice (20) adjacent the inlet; one-way valve means (22) for closing the orifice (20); the valve means being biased to allow passage of breath sample from the inlet to the outlet; and expandable sample container means (12) in flow communication with the outlet for receiving breath samples therefrom. The apparatus is configured to allow for the taking of a single breath sample which may provide two or three separate and subsequent readings on an analyzer instrument. The sample may be held and maintained for a period of time prior to the subsequent analysis. The device is of simplified construction of inexpensive materials, making it particularly appropriate for mass production rechniques. It may include a separate disposable mouthpiece (30) so that the device may be used several times prior to discarding.</p> |
