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 wire (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.