| 摘要 |
A device (20) for determining the location of the wall of an artery (22) in a living being via a percutaneous incision or puncture (24, 24A). The device comprises an elongated tubular member having a distal end portion (40B), a proximal end portion (40A), and a passageway (46) extending therethrough for receipt of a guide wire (28). The device is inserted through an introducer sheath (26) having an open distal end (34) into said percutaneous incision or puncture (24, 24A) over said guide wire (28) so its distal end portion (40B) is located within the artery (22) and its proximal end portion (40A) is located outside of the body of the being. The device (20) has two liquid entrance ports (54) in its distal end portion (40B) and one liquid outlet port (56) in its proximal end portion (40A). The liquid entrance ports (54) and outlet port (56) are in communication with each other through the device's passageway (46). When the device (20) is positioned within the introducer sheath (26) and the entrance ports (54) are located beyond the open distal end (34) of the introduces sheath (26) and within the artery (22), blood flows (58) into the entrance ports (54) through passageway (46) and out through the outlet port (56) so that it can be observed. The device (20) and introduces sheath (26) are then retracted until the flow of blood out of the outlet port (56) stops, thereby indicating the location of the artery wall (22). |
