CN201022736Y

CN201022736Y - Trocar for microwound operation

Info

Publication number: CN201022736Y
Application number: CNU2007200931884U
Authority: CN
Inventors: 张少臣
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-22
Filing date: 2007-01-22
Publication date: 2008-02-20
Anticipated expiration: 2017-01-22

Abstract

The utility model provides a minimally invasive operation trocar, comprising a needle cylinder and a needle core. The needle cylinder is a tubular hollow sleeve; the needle core is sleeved in the needle cylinder; the length of the needle core is bigger than that of the needle cylinder and can extend out of the needle cylinder. The pinhead of the needle core is triangular or spherical. The utility model is applicable for the intervertebral disc and the vertebral tube (the rear, the dypass, the intervertebral foramen) punctures. The puncture needle is in the structure of sleeve needle core. A tip needle core is used in the skin puncture; the needle core goes directly into the nucleus pulposus without being exchanged when applied to the disc injection. When applied to the vertebral tube rear or the intervertebral foramen punctures, the tip needle core is replaced by a round needle core when reaching the yellow ligament or the intervertebral foramen led by CT or X light guiding thus to avoid injuring the vascular, the hard ridge membrane and the nerve root. After pulling out of the round needle core, the needle cylinder becomes a service aisle for various micro apparatus, thus the liquid, the gas, the fiber, the endoscopies, etc. can enter to accomplish various interventional therapies.

Description

The Minimally Invasive Surgery trocar

Technical field

This utility model discloses a kind of Minimally Invasive Surgery trocar, is to the improvement of existing thecal puncture needle construction, belongs to technical field of medical instruments.

Background technology

Its front end of spinal needle that uses clinically is the acute angle hollow-core construction of cutting sth. askew at present, and needle point is sharp, and therefore, sharp needle point is easy to injured blood vessel, spinal dura mater and nerve root in operation, causes operative failure or causes various complication.

Summary of the invention

This utility model provides a kind of Minimally Invasive Surgery trocar, has overcome the sharp shortcoming of stabbing other position tissues easily of existing acute angle puncture needle syringe needle.

Technical solution of the present utility model is as follows: puncture needle is made of syringe and nook closing member, and wherein, syringe is piped hollow sleeve, and nook closing member is sleeved in the syringe, and the length of nook closing member is greater than the length of syringe, outside the extended syringe; The syringe needle of described nook closing member is three stupefied pointed or spherical.

This utility model is applicable in the intervertebral disc, (way of escape, dypass, intervertebral foramina) puncture in the canalis spinalis.

Good effect of the present utility model is: puncture needle adopts the sleeve needle cored structure, use pointed nook closing member during skin puncture, need not change in the time of in being applied to coil in the through vertebral pulp of nook closing member, when being used for the puncture of the canalis spinalis way of escape or intervertebral foramina, under CT or the guiding of X line, when arriving ligamenta flava or intervertebral foramina, change circular nook closing member, avoid injured blood vessel, spinal dura mater and nerve root.After extracting circular nook closing member, syringe is the service aisle that is applicable to that various miniature utensils enter.Liquid, gas, optical fiber, scope etc. are entered finish multiple interventional therapy.

Description of drawings

Fig. 1 is this utility model structure principle chart.

Fig. 2 is this utility model nook closing member structure principle chart.

The specific embodiment

According to shown in Figure 1, this utility model is made of the syringe 1 and the nook closing member 2 of hard, and syringe 1 is piped hollow sleeve structure, and nook closing member 2 is sleeved in the syringe 1, and the length of nook closing member 2 is greater than the length of syringe 1, outside the extended syringe 1; The syringe needle shape of described nook closing member 2 adopts three stupefied pointed or spherical (referring to Fig. 2).

Claims

1. Minimally Invasive Surgery trocar, it is characterized in that: be made of syringe and nook closing member, syringe is piped hollow sleeve, and nook closing member is sleeved in the syringe, and the length of nook closing member is stretched out outside the syringe greater than the length of syringe.

2. the Minimally Invasive Surgery trocar according to claim 1 is characterized in that: the syringe needle of nook closing member is three stupefied pointed or spherical.