| 摘要 |
A catheter tube of the type having a sleeve provided therearound adjacent the end which is inserted into a body channel, the ends of sleeve being secured to the tube and the sleeve being inflatable is described. The sleeve is either formed from gas impermeable material or is at least partly coasted with such material to prevent passage of gas into and/or out of the space between the sleeve and the tube. A rise in the pressure exerted on the body channel by the sleeve and consequent tissue damage or a pressure drop and consequent danger of slippage or loss of gas, if the catheter is being employed to supply gas to a patient, can therefore be prevented. |
