CN214967592U

CN214967592U - Lengthened trocar with side hole

Info

Publication number: CN214967592U
Application number: CN202120082090.9U
Authority: CN
Inventors: 张文文; 解正高; 朱丹丹; 张司; 刘亚军; 陈菲菲; 何自芳
Original assignee: Nanjing Drum Tower Hospital
Current assignee: Nanjing Drum Tower Hospital
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-12-03
Anticipated expiration: 2031-01-13

Abstract

The utility model relates to a take long sleeve pipe needle of side opening for ophthalmic surgery drainage usefulness in the medical instrument field, including sleeve pipe and filling needle, the sleeve pipe is extension sleeve pipe, the sleeve pipe can cooperate the cover in filling needle periphery, the sleeve pipe is equipped with the spacing arch of week portion evagination along length direction's one end, and the casing wall circumference that is close to spacing arch one side is equipped with a plurality of sieve meshes. The utility model discloses a take long sleeve pipe drainage needle of side opening, to the patient glass that the retina that accompanies the choroid and breaks away from cuts the operation, the sleeve pipe that the extension set up stretches into the eye from the puncture incision after, can directly reach the vitreous body intracavity, the sieve mesh position just in time is located the position of choroid hydrops bodiness, take out the pjncture needle this moment, the hydrops can follow in the sieve mesh infiltration cover pipe and drain to the eye and get rid of outward, treat not having to place again after the obvious liquid discharge that the filling tube carries out conventional glass and cuts the operation, the pipe wall and the sleeve pipe cooperation suit of filling tube this moment, can block up the sieve mesh passageway, to normal glass cut the operation nothing influence.

Description

Lengthened trocar with side hole

Technical Field

The utility model relates to the field of medical appliances, in particular to a long trocar with a side hole for drainage in ophthalmic surgery.

Background

In vitrectomy surgery for retinal detachment with choroidal detachment, a trocar is used. A trocar used in the conventional vitrectomy is used as a puncture hole 3.5mm behind the corneal limbus so as to manufacture a channel for surgical instruments such as an infusion tube, a vitrectomy head, a light guide optical fiber and the like to enter eyes. In the prior art, the length of a cannula in a vitrectomy operation is 3mm, the suprachoroidal space is thickened due to effusion in the suprachoroidal space frequently in the vitrectomy operation accompanied with choroidal detachment, and after the cannula enters an eye part from a puncture port, the cannula is difficult to enter the vitreous cavity due to the limitation of the length of the cannula, or a perfusion outlet enters the suprachoroidal space in the operation process, so that the choroidal detachment range is increased, and even serious complications such as suprachoroidal hemorrhage and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that arouses the complication easily to the vitrectomy operation that accompanies the choroid and cut the operation with sleeve pipe length restriction to vitrectomy among the prior art, provide a take the extension trocar of side opening to make things convenient for extension sleeve pipe to get into the vitreous chamber, through pipe wall side opening drainage choroid hydrops, guarantee operation cure effect simultaneously.

The utility model aims at realizing like this, a take extension trocar of side opening, including sleeve pipe and filling needle, its characterized in that, the sleeve pipe is extension sleeve pipe, the sleeve pipe can cooperate the cover in filling needle periphery, the sleeve pipe is equipped with the spacing arch of week portion evagination along length direction's one end, and the casing wall circumference that is close to spacing arch one side is equipped with a plurality of sieve meshes.

The utility model discloses a take extension trocar of side opening, the setting of elongated sleeve pipe, to the vitreous body excision operation that accompanies the choroid and break away from, extension sleeve pipe stretches into behind the eye from the puncture incision, can ensure that the mouth of pipe directly reachs vitreous body intracavity portion, and the sieve mesh position just in time is located the position of choroid hydrops bodiness, take the pjncture needle out this moment, the hydrops can follow in the sieve mesh infiltration cover pipe and drain to the eye and get rid of outward, treat to have obvious liquid discharge after placing again and fill the pipe and carry out conventional glass cutting operation, fill the pipe wall and the sleeve pipe cooperation suit of pipe this moment, can block up the sieve mesh passageway, do not have the influence to normal glass cutting operation.

Furthermore, the length of the sleeve is 6-8mm, the distance between the starting position of the sieve hole section and the end side of the limiting protrusion is 1.5-2 mm, and the length of the sieve hole section is 1.2-1.5 mm. The lengthened sleeve is convenient for the sleeve to directly penetrate through the fallen choroid and enter the vitreous cavity, and avoids the occurrence of complications such as mistaken entry of perfusion liquid into suprachoroidal space or subretinal space and the like.

Furthermore, the aperture of the sieve pore is 0.2-0.3 mm.

Further, the specification of the perfusion needle is 23 Gauge or 25 Gauge or 27 Gauge, and the wall thickness of the sleeve is 0.12-0.15 mm.

Drawings

Fig. 1 is a schematic structural view of the long trocar with side holes of the present invention.

Fig. 2 is a schematic structural view of the sleeve.

Fig. 3 is a schematic view of a cannula penetrating the choroid to drain fluid.

Fig. 4 is a schematic view of the long trocar with side holes of the present invention in the vitrectomy procedure.

Detailed Description

As shown in fig. 1 and 2, the utility model discloses a long casing needle with side hole, including sleeve pipe 1 and filling needle 2, sleeve pipe 1 can cooperate the cover in filling needle 3 periphery, sleeve pipe 1 is equipped with spacing arch 4 of week portion evagination along length direction's one end, and the casing wall circumference that is close to spacing arch 4 one side is equipped with a plurality of sieve meshes 2. Wherein, the length of the sleeve is 6-8mm, the distance between the starting position of the sieve hole section and the end side of the limiting bulge 4 is 1.5-2 mm, and the length of the sieve hole section is 1.2-1.5 mm.

In this embodiment, specifically, the aperture of the sieve pore 2 is 0.2-0.3 mm; the specification of the perfusion needle 3 is 23 Gauge or 25 Gauge or 27 Gauge, and the wall thickness of the sleeve 1 is 0.12-0.15 mm.

When the long sleeve needle with the side hole is used for performing the vitrectomy operation, after the retrobulbar anesthesia works, a towel is spread in a disinfection mode, an eyelid opener is arranged in an operation eye, a puncture opening is made in a 3.5mm or 4.0mm conventional mode after the distance between the eyelid and the corneal margin, then the long sleeve with the side hole penetrates into a vitreous cavity, as shown in fig. 3, at the moment, a sieve pore section is just located at the choroid, effusion under the retina is subjected to spontaneous drainage, a perfusion needle is placed in a sleeve system after no obvious liquid flows out, as shown in fig. 4, a sieve pore channel can be blocked, and conventional vitrectomy operation is performed.

Therefore, the lengthened sleeve of the long sleeve needle with the side hole of the utility model is convenient for directly penetrating and separating from the choroid to enter the vitreous cavity, and avoids the occurrence of complications such as the perfusion fluid entering the suprachoroidal space or the subretinal space by mistake. Secondly, the sleeve in the trocar system is provided with a plurality of side holes, the suprachoroidal space liquid can be automatically drained when the perfusion head is not inserted, the side holes of the drainage area are shielded after the perfusion head is inserted, and vitreous fibers cannot enter the sleeve and wind the vitreous cutting head.

Claims

1. The utility model provides a take extension trocar of side opening, includes sleeve pipe and filling needle, its characterized in that, the sleeve pipe is extension sleeve pipe, the sleeve pipe can cooperate the cover in filling needle periphery, the sleeve pipe is equipped with the spacing arch of week evagination along length direction's one end, is close to the casing wall circumference of spacing protruding one side and is equipped with a plurality of sieve meshes.

2. The lengthened trocar with the side hole according to claim 1, wherein the length of the sleeve is 6-8mm, the distance between the starting position of the sieve pore section and the end side of the limiting protrusion is 1.5-2 mm, and the length of the sieve pore section is 1.2-1.5 mm.

3. The lengthened trocar with the side hole according to claim 1, wherein the hole diameter of the sieve hole is 0.2-0.3 mm.

4. The extended length trocar with side hole according to claim 1, wherein the size of the perfusion needle is 23 Gauge or 25 Gauge or 27 Gauge, and the wall thickness of the cannula is 0.12-0.15 mm.