| 摘要 |
<p>A tubular airway adapter having a hollow interior and a cylindrical wall for providing a sample gas air flow. The adapter includes an annular channel (170) in the cylindrical wall and a plurality of radial channels (172) extending from the annular channel to the interior. The annular channel is in fluid communication with ambient atmosphere through a port (174) in the cylindrical wall. The wall of the adapter increases in thickness from on either side of the annular channel towards the annular channel to provide a double conically shaped interior and a wall region which protrudes into the interior at the location of the annular channel.</p> |
