| 摘要 |
<p>A device for collection of exfoliated cells from the rectal mucosa comprises a hollow, cylindrical body having an inflatable and invertible flexible membrane attached to one end thereof. Applying positive pressure to inflate the membrane after the device is inserted, preferably through a rectal access tube, into the rectum causes exfoliated cells to be collected on the surface of the membrane. Before removal of the device, negative pressure is applied and the membrane, along with the collected sample of exfoliated cells, is deflated, inverted and withdrawn into the body of the device, thereby avoiding contact of the collected sample with body surfaces or the rectal access tube as the device is removed from the rectum.</p> |
