Medical anaesthetic needle

Abstract

An extremely easy-to-use medical anesthetic needle comprising a hard anesthetic needle (1), and an anesthetic needle (40) being inserted rotatably into the hard anesthetic needle from the base end part side. The hard anesthetic needle is provided, at the base end part thereof, with a tubular length adjusting mechanism (10) extending in the axial direction. The anesthetic needle is provided, at the base end part thereof, with a tubular lock part (44) being fitted idly in the length adjusting mechanism of the hard anesthetic needle. The lock part has a central part for receiving an inserted a needle, and the outer circumferential surface arranged side by side with a plurality of circumferential grooves (45) in the axial direction. The length adjusting mechanism is provided internally with a lock protrusion (17) engaging with the circumferential groove to prohibit movement of the anesthetic needle in the axial direction and slidable together with the circumferential groove in the circumferential direction.

Description

technical field [0001] The invention relates to a medical anesthesia needle composed of a hard anesthesia needle and an anesthesia needle. Background technique [0002] Conventional methods of injecting anesthesia into the spinal region, etc. of the patient include injecting the drug into the epidural space of the patient using a hard anesthesia needle, and injecting the drug directly into the subarachnoid space such as the spine using a needle of a smaller diameter. The method of medicine. However, in the former case, in order to reach the nerve root, the drug must pass through the semi-liquid fat part, so the inhibitory effect of the anesthetic is slow, and it becomes the cause of a large amount of drug to obtain a sufficient inhibitory effect. Toxicity concerns may arise. On the other hand, regarding the latter, there is a problem that in order to make the needle reach the subarachnoid space, it is necessary to puncture the dura mater, and since the cerebrospinal fluid ...

AI Technical Summary

Problems solved by technology

[0008] However, if Figure 14 The shown existing medical anesthesia needle, because the large-diameter part 103a of the engagement device 103 installed on the anesthesia needle 102 slides outside the small-diameter part 103b, is the same as the above-mentioned medical anesthesia needle, and it is not easy to find. The problem of the sensation of the anesthesia needle 102 piercing into the subarachnoid space

In addition, since the small-diameter portion 103b of the engaging device 103 is integrated with the hard needle 101, there is a problem that the engaging device cannot be attached to the hard needles of different manufacturers produced in accordance with the prescribed international standards.

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