| 摘要 |
<p>A spinal-epidural needle assembly has a rearwardly-extending sleeve 16 on the epidural needle 1 that has a series of circumferentially-extending ribs 22 on its outer surface. The spinal needle has a collar 32 extending forwardly from its hub 31 and slidable along outside of the sleeve 16 of the epidural needle. The collar 32 has a small elastomeric pad 33 on its inner surface, which is slidable along a smooth region 20 to one side of the ribbed region 21. The spinal needle 2 is locked longitudinally relative to the epidural needle 1 by twisting its collar 32 so that the elastomeric pad 33 slides laterally over the ribbed region 21 with the ribs 22 gripping into the pad. <IMAGE></p> |
