| 摘要 |
This invention relates to a catheter tube which is fitted into and left in a body cavity having a relatively small diameter typified by a blood vessel and is used for the inspection or medical treatment of the interior of the body cavity. The catheter tube of the present invention is equipped with at least one inflatable balloon near its tip, and a lumen for inflating the balloon, a lumen for injecting a liquid into the body cavity and a lumen for storing an instrument for inspection or for medical treatment are formed inside a tube body. The features of the present invention reside in that the inspection or medical treatment instrument described above is moved in the longitudinal direction of the tube, the tip thereof is fed into and out from the opening of the lumen for housing the instrument to facilitate clear observation over a wide range, each of the lumens described above can be substituted by a commonly used lumen so as to reduce the diameter of the tube, observation is made between two balloons to secure a clearer observation image and a bypass lumen is disposed in order to secure the blood flow through the blood vessel even during observation and to enable observation for a long time. |
