| 摘要 |
<p>[PURPOSE] To provide a Veress needle which can easily prevent a needle tip from being pulled out from a puncturing site. [CONSTITUTION] A Veress needle including a hollow puncturing needle 110 having a distal end portion with a needle tip 112 and a lumen 118, an insertion member 130 slidably inserted in the lumen 118, an urging device and a pullout preventing device 105. The urging device is adapted to urge the insertion member 130 such that, before puncturing is performed by the needle tip 112 and after the puncturing is completed, a distal end portion 134 of the insertion member 130 protrudes from the needle tip 112, and the distal end portion 134 of the insertion member 130 is retreated to the lumen 118 based on a load of the puncturing upon the puncturing by the needle tip 112. The pullout preventing device 105, after the load of the puncturing disappears, prevents the needle tip 112 from being pulled out from a puncturing site in conjunction with protruding movement of the distal end portion 134 of the insertion member 130 from the lumen 118.</p> |
