Extradural puncturing needle

Abstract

The invention relates to a medical apparatus, in particular to a subdural tap needle used for intravertebral anesthesia, which consists of an external needle and a needle core. The external needle consists of a tubular first needle body and a first needle bar, wherein, the intersection point of the opening of a first needle tip and the middle axis of the first needle body is in the inner of the opening. A second needle tip shapes in cone and the tip end of the second needle tip passes through the opening of the first needle tip. The outer wall of the second needle tip is tightly matched with the inner of the external needle opening. The first needle body is provided with a fixed facility which can control the inserting depth so as to avoid puncturing dura mater accidentally. The needle tip of the subdural tap needle can separate tissue and muscle fibre bluntly. The wound is small and easy to heal; the spinal puncture needle can not be bent and the success rate of the spinal puncture can be increased. Because of small friction, the mental fragments are not easily produced, which avoids the hidden trouble caused by the residues of mental fragments left in the body of a patient.

Description

technical field [0001] The invention relates to a medical appliance, in particular to an epidural puncture needle for intraspinal anesthesia. Background technique [0002] The spine is the backbone of the human body, and it is also the main channel and protective cover for the transmission of nerve information. The spine, as the central part of the human body, is structurally located in the center of the body, coordinating and controlling the activities of the head and limbs. Nerves from each pair of intervertebral foramina control sensory and motor functions throughout the body. When the human body is sick and needs to perform surgery or perform diagnostic inspection operations, in order to reduce the pain of the patient, ensure the safety of the patient, and create good surgical conditions, it is necessary to anesthetize the patient. Intraspinal anesthesia is an important way of anesthesia. It injects local anesthetics into different cavities in the spinal canal to anest...

AI Technical Summary

Problems solved by technology

[0007] 2. The caliber of the epidural needle tip is relatively large. The needle tip cuts off the fibrous connective tissue of the dura mater and forms a large breach, which is extremely difficult to heal. About 2/3 of patients who mistakenly penetrate the dura mater suffer from headaches

[0008] 3. When the epidural catheter is placed through the inner cavity of the outer needle of the epidural puncture needle, due to the poor position of the epidural catheter, the epidural catheter strays into the non-epidural space, blood vessel or subarachnoid space, requiring When withdrawing the epidural catheter, it is necessary to withdraw the epidural puncture needle together, or even re-place the epidural catheter to increase the damage caused by the epidural puncture

If only the epidural catheter is withdrawn but the epidural needle is not withdrawn, the epidural catheter may be cut off by the sharp edge ...

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