| 摘要 |
An apparatus in a medical delivery device for biasing tubing having a select original cross section which is subject to compression and relaxation to substantially its original cross section upon relaxation. The apparatus includes a plurality of bumpers disposed lengthwise of the tubing operatively associated with the tubing to bias the tubing to its original cross section and spaced relative to adjacent bumpers to provide for free expansion of the tubing as it is subject to compression. |
