| 摘要 |
A guidewire (10) for placement within a blood vessel for penetrating an occlusion therein. The guidewire (1) comprises a length of flexible wire (12) having a lumen extending therethrough. The distal end of the guidewire (10) is generally arcuate and has a diameter greater than that of the wire (12) immediately proximal thereto. A flexible stylet (32) substantially the same length as the flexible wire (12) may be disposed within the lumen of the wire (12). The stylet (32) and the guidewire (10) have locking means (19, 18), such as Luer locking threads. In operation, the arcuate distal end of the guidewire (10) is positioned in the blood vessel against an occlusion, and a dottering action is thereafter provided whereby the arcuate distal end of the guidewire (10) repeatedly impinges on the occlusion until penetration of the occlusion occurs. |
