Nerve block needle with resistance feedback

Abstract

The invention relates to the field of medical devices, and particularly discloses a nerve block needle with resistance feedback. The nerve block needle includes a needle core, a needle seat, a pressure observation mechanism and an injection mechanism. The pressure observation mechanism includes a first cylinder, a second cylinder, and a U-shaped tube pressure gauge. A first accommodating cavity isformed in the first cylinder, the second cylinder is arranged in the first accommodating cavity, and a second accommodating cavity is formed in the second cylinder. The nerve block needle further includes an elastic blocking mechanism, the elastic blocking mechanism is movably fitted in the second accommodating cavity in the height direction, one end of the elastic blocking mechanism penetrates through the bottom of the second accommodating cavity and then fits with a liquid inlet, and one end of the U-shaped tube pressure gauge communicates with a liquid outlet. According to the nerve blockneedle, by visually observing the liquid level in the U-shaped tube pressure gauge, an operator can conveniently grasp the resistance at the time of drug injection in real time, a judgment can be madeso as to adjust the position of the needle core for smooth completion of the liquid drug injection, and the clinical significance is important.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a nerve block needle with resistance feedback. Background technique [0002] At present, ultrasound-guided nerve block is widely used clinically, which plays an important role in alleviating postoperative pain, reducing the consumption of central analgesic drugs, and accelerating postoperative recovery. Ultrasound-guided visualization technology has changed the mode of blind detection in the past, and it is more accurate, safe and convenient for teaching. [0003] However, ultrasound guidance also brings some problems. During the operation, the operator needs to fix the ultrasound probe with one hand and operate the nerve block needle with the other hand. At this time, additional personnel are required to withdraw and inject the drug. This two-person operation requires an assistant with rich relevant experience to accurately perceive whether the pressure of pushing the medicine i...

AI Technical Summary

Problems solved by technology

However, in clinical work, anesthesiologists can usually only seek the assistance of nurses. It is difficult to accurately feed back the resistance encountered during drug injection to the operator, and it is not convenient for the operator to make rapid adjustments.

At the same time, it is difficult to accurately grasp the injection speed, which increases the risk of intraneural injection of drugs and local anesthetic drug poisoning

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