| 摘要 |
A nerve blocking indwelling catheter needle with a resistance measurement device comprises a needle core (6), a catheter (1), and a pressure detection device. The needle core (6) penetrates through the catheter (1), and a tail end of the catheter (1) is connected to a connection tube (19). A rubber plunger (4) is disposed in the connection tube (19). The needle core (6) penetrates through the rubber plunger (4), and a side tube (3) is disposed on a side wall of the connection tube (19) in front of the rubber plunger (4). A channel is disposed in the needle core (6). An opening (5) is disposed on a side wall of the needle core (6) that is located in the connection tube (19) and in front of the rubber plunger (4), and the opening (5) is in communication with the channel. The pressure detection device comprises a shell (20). An inner rod (11) is disposed in the shell (20), and a front end of the inner rod (11) is connected to a rear end of the needle core (6). A pressure sensor (12) is disposed between a tail end surface (13) of the shell (20) and a tail end surface of the inner rod (11), and the pressure sensor (12) is connected to a measurement circuit through a signal line (17). The measurement circuit is connected to a display device (18). When a needle tip (61) breaks through tunica vaginalis, the pressure on the needle tip (61) has a great difference, and the difference is expressed through the display device (18), so as to prompt operating personnel that the nerve block enters the tunica vaginalis and is adjacent to the nerve to be blocked. The catheter needle is simple and convenient in operation and does a small damage to the nerve. |
