| 摘要 |
<p>A cannula of the kind which includes a front part having a pointed-part for insertion into a patient, and a rear part having a pointed-part for insertion into a blood collecting container. The cannula is provided on a part located between the pointed-parts with a screw thread intended for coaction with a corresponding screw thread in a container guide sleeve. The invention is characterized in that the cannula (1) is provided with a further screw thread (9) adjacent the first mentioned screw thread (6), but closer to the rear pointed-part (4). The diameter of the further screw thread (9) is smaller than the diameter of the first mentioned screw thread (6) and in that the further screw thread (9) is threaded in a direction opposite to the first mentioned screw thread (6). The further screw thread (9) is intended for coaction with a protective sleeve (10) provided with a corresponding internal screw thread (11).</p> |
