WO2023010609A1

WO2023010609A1 - Improved ophthalmic vitreous body cutting head

Info

Publication number: WO2023010609A1
Application number: PCT/CN2021/112402
Authority: WO
Inventors: 张弛
Original assignee: 张弛
Priority date: 2021-08-03
Filing date: 2021-08-13
Publication date: 2023-02-09

Abstract

An improved ophthalmic vitreous body cutting head, comprising a handle (5), an outer tube (1) fixed on the handle (5) and provided with an opening (101) on a front end tube wall, and an inner tube (3) sleeved in the outer tube (1) and provided with a front end (301) capable of moving back and forth along the opening (101). The handle (5) is provided with a telescopic sheath (2) that wraps the outer wall of the outer tube (1). During an operation, after the outer tube (1) is inserted into the vitreous body of the eyeball, the sheath (2) retracts backwards to always protect the outer tube (1) located outside the eyeball. Even if a force for bending the outer tube (1) occurs in the operation, the bending resistance of the outer tube (1) can be improved due to the protection of the sheath (2), the outer tube (1) is effectively prevented from being bent, and the normal operation is ensured.

Description

An Improved Ophthalmic Vitreous Cutting Head

technical field

The utility model belongs to an ophthalmic surgical instrument, in particular to an improved ophthalmic vitreous body cutting head.

technical background

A vitrectomy tip is an ophthalmic surgical instrument used to cut and aspirate the vitreous inside the eye. The existing vitreous body cutting head adopts the structure of inner and outer double sleeves, wherein the outer tube is fixed on the handle, and the front end of the outer tube is provided with an opening, and the inner tube is sleeved in the outer tube and can stretch back and forth in the opening to remove the tissue that enters the opening. resection. In order to ensure the suction efficiency, the outer tube wall is designed to be thinner as much as possible during product processing. Therefore, when the surgical incision is made, the outer tube is prone to bending, causing the operation to fail to work normally.

Utility model content

The purpose of the utility model is to provide an improved ophthalmic vitreous body cutting head which can effectively prevent the inner tube from bending.

Realize the technical scheme that the utility model object adopts as follows:

The improved ophthalmic vitreous body cutting head provided by the utility model includes a handle, an outer tube fixed on the handle and having an opening on the front end tube wall, and an inner tube sleeved in the outer tube and the front end can move back and forth along the opening. The handle is provided with a retractable sheath wrapping the outer wall of the outer tube.

The sheath includes a front sleeve and a rear sleeve which are sheathed with each other, and a return spring is provided at the rear end of the front sleeve.

The rear sleeve is arranged outside the handle, and the return spring is sleeved on the outer tube and located between the rear end of the front sleeve and the rear sleeve.

The rear sleeve and return spring in the sheath are arranged inside the handle, and the return spring is sleeved on the inner tube and located between the rear end of the front sleeve and the rear sleeve.

The rear part of the handle includes an elastic diaphragm that can move back and forth inside, a rear air chamber behind the elastic diaphragm, a suction pipe at the rear end, a nozzle communicated with the suction pipe, and a rear air chamber. A connected air inlet nozzle, the handle is provided with a connecting pipe fixedly connected with the rear end of the inner pipe and movably sleeved in the suction pipe and a return spring arranged in front of the elastic diaphragm, the The elastic diaphragm is fixedly connected with the connecting pipe.

The front surface of the elastic diaphragm is connected with the return spring through a spring seat.

The rear part of the handle includes an elastic diaphragm that can move back and forth inside, a rear air chamber behind the elastic diaphragm, a suction pipe at the rear end, a nozzle communicated with the suction pipe, and a rear air chamber. A connected air inlet nozzle, the rear part of the inner pipe is movably sleeved in the suction pipe, and the elastic diaphragm is fixedly connected with the inner pipe.

The rear part of the handle includes an elastic diaphragm that can move back and forth inside, a front air chamber and a rear air chamber that are respectively arranged in front of and behind the elastic diaphragm, and a suction pipe that is located at the rear end, and a suction pipe that communicates with the suction pipe. The nozzle and the air inlet nozzle communicated with the front air chamber and the rear air chamber respectively, the rear part of the inner pipe is movably sleeved in the suction pipe, and the elastic diaphragm is fixedly connected with the inner pipe.

Beneficial effect

During the operation of the utility model, when the outer tube is inserted into the vitreous body of the eyeball, the sheath will shrink backwards to always protect the outer tube outside the eyeball. The protection can enhance the bending resistance of the outer tube, effectively avoid the bending of the outer tube, and ensure the normal operation.

Further illustrate the technical scheme of the utility model below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of different structures of the utility model.

Detailed ways

Example 1

See Fig. 1, the improved ophthalmic vitreous body cutting head that the utility model provides, comprises handle 5, is fixed on the handle 5 and is provided with the outer tube 1 of opening 101 on the front tube wall, is sleeved in the outer tube 1 and the front end 301 can be along The opening 101 is an inner tube 3 that stretches forward and backward, and the handle 5 is provided with a sheath 2 that wraps the outer wall of the outer tube 1 and is retractable. The length of the outer tube 1 exposed on the handle 5 is at least 10mm, preferably no more than 60mm.

The sheath 2 includes two front and

rear sleeves

201, 202 that are sheathed with each other. The rear end of the front sleeve 201 is provided with a return spring 203. Specifically, the rear sleeve 202 is arranged outside the handle 5 to return The position spring 203 is sleeved on the outer tube 1 and located between the rear end of the front sleeve 201 and the rear sleeve 202 .

The more specific structure of the utility model includes: the rear portion 8 of the handle 5 includes an elastic diaphragm 10 that can move back and forth inside, a rear air chamber 7 behind the elastic diaphragm 10, a suction pipe 801 at the rear end, The nozzle 802 communicated with the suction pipe 801 and the air inlet nozzle 803 communicated with the rear air chamber 7, the handle 5 is provided with a fixed communication with the rear end 302 of the inner pipe 3 and is movably sleeved on the pump. The connecting pipe 9 in the suction pipe 801 and the return spring 4 arranged at the front of the elastic diaphragm 10, the elastic diaphragm 10 is fixedly connected with the connecting pipe 9, and the front of the elastic diaphragm 10 is connected to the elastic diaphragm 10 through the spring seat 6. The return spring 4 is connected; the rear part 8 and the handle 5 are combined structures, and the rear part 8 can be disassembled from the handle 5 in order to assemble the elastic diaphragm 10, the spring seat 6, the inner tube 3, the connecting tube 9 and the return Parts such as spring 4.

Working principle: see Figure 1. During ophthalmic surgery, the negative pressure tube and trachea are externally connected through the nozzle 802 and the air inlet nozzle 803. When the air inlet nozzle 803 is fed into the gas, the air pressure in the rear air chamber 7 increases, forcing the elastic diaphragm 10 Overcome the action of the return spring 4 to move forward, and drive the inner tube 3 to move forward through the connecting tube 9. When the forward movement of the front end 301 of the inner tube 3 exceeds the opening 101 of the outer tube 1, a physical cutting effect can be generated. Cut the tissue entering the outer tube 1 and close the opening 101 of the outer tube 1; when the air inlet 802 stops air intake, under the joint action of the return spring 4 and the elastic diaphragm 10, the inner tube 3 is driven to move backward , re-open the opening 101 of the outer tube 1, the cut tissue is sucked away by the negative pressure from the nozzle 802 through the inner tube 3 and the connecting tube 9, so that the cycle can produce cutting and suction. After the outer tube 1 is inserted into the vitreous body of the eyeball, the front end of the sleeve tube 201 of the sheath 2 will shrink backwards when encountering the resistance of the eyeball. 1, the bending force, due to the protection of the sheath 2, can enhance the bending resistance of the outer tube 1, effectively avoid the bending of the outer tube 1, and ensure the normal operation. After the outer tube 1 is pulled out from the eyeball, the front sleeve 201 of the sheath 2 returns automatically under the action of the return spring 203 and blocks the opening 101 of the outer tube 1 .

The utility model also can not set the connecting pipe 9, the return spring 4 and the spring seat 6, directly extend the inner pipe 3 into the suction pipe 801, and fix the elastic diaphragm 10 and the inner pipe 3, and utilize the air pressure and the elastic diaphragm 10 itself The elasticity drives the inner tube 3 to move back and forth, so as to realize the functions of tissue resection and suction. The sheath 2 also does not need the return spring 203, and the front sleeve pipe 201 can also be reset manually.

Example 2

As shown in Fig. 2, the difference between this embodiment and embodiment 1 is that the rear sleeve 202 and the return spring 203 in the sheath 2 are arranged inside the handle 5, and the rear part 8 of the handle 5 is embedded with an elastic diaphragm 10 A front air chamber 11 is added in the front of the front, and the end of the rear part 8 is provided with an air intake nozzle 804 communicating with the front air chamber 11. The rear part of the inner pipe 3 is movably sleeved in the suction pipe 801, elastically The diaphragm 10 is fixed with the inner tube 3, and the connecting tube 9, the return spring 4 and the spring seat 6 are not provided.

When gas enters the air inlet nozzle 803 (at this time, no air enters the air inlet nozzle 804), the elastic diaphragm 10 is affected by the gas pressure of the rear air chamber 7, driving the inner pipe 3 to move forward, and the opening 101 of the outer pipe 1 is closed state; when the air inlet nozzle 804 has gas entering (the air inlet nozzle 803 has no gas entering at this moment), the diaphragm 9 is affected by the gas pressure of the front air chamber 11, and the inner pipe 3 is driven to move backward, and the opening 101 of the outer pipe 1 is in the open state. Under the alternating action of the air pressure in the rear air chamber 7 and the front air chamber 11, the elastic diaphragm 10 drives the inner tube 3 to move back and forth to realize tissue resection and suction.

Claims

An improved ophthalmic vitreous body cutting head, comprising a handle, an outer tube fixed on the handle and having an opening on the tube wall at the front end, an inner tube sleeved in the outer tube and the front end can move back and forth along the opening, the feature is that The handle is provided with a retractable sheath wrapping the outer wall of the outer tube.
The improved ophthalmic vitrectomy head according to claim 1, characterized in that said sheath comprises a front sleeve and a rear sleeve sleeved in each other, and a return spring is provided at the rear end of said front sleeve.
The improved ophthalmic vitrectomy head according to claim 2, characterized in that the rear sleeve is arranged on the outside of the handle, and the return spring is sleeved on the outer tube and is located at the rear end of the front sleeve and the between the rear sleeves.
The improved ophthalmic vitrectomy head according to claim 2, characterized in that the rear sleeve and the return spring in the sheath are arranged inside the handle, and the return spring is sleeved on the inner tube and located at the front between the rear end of the sleeve and the rear sleeve.
According to the improved ophthalmic vitreous body cutting head described in any one of claims 1 to 3, it is characterized in that the rear portion of the handle includes an elastic diaphragm that can move back and forth inside, and a rear air chamber behind the elastic diaphragm, and also includes The suction pipe arranged at the rear end, the nozzle connected with the suction pipe and the air inlet nozzle connected with the rear air chamber, the handle is provided with a fixed connection with the rear end of the inner pipe and is movably sleeved on the A connecting pipe in the suction pipe and a return spring arranged in front of the elastic diaphragm, the elastic diaphragm is fixedly connected with the connecting pipe.
The improved ophthalmic vitrectomy head according to claim 5, characterized in that the front of the elastic diaphragm is connected with the return spring through a spring seat.
According to the improved ophthalmic vitreous body cutting head described in any one of claims 1 to 3, it is characterized in that the rear portion of the handle includes an elastic diaphragm that can move back and forth inside, and a rear air chamber behind the elastic diaphragm, and also includes The suction pipe arranged at the rear end, the nozzle connected with the suction pipe and the air inlet nozzle connected with the rear air chamber, the rear part of the inner pipe is movably sleeved in the suction pipe, the elastic diaphragm and the The inner tube is fixedly connected.
According to the improved ophthalmic vitreous body cutting head described in any one of claims 1, 2, 4, it is characterized in that the rear part of the handle includes an elastic diaphragm that can move back and forth inside, and front and rear front and back parts that are respectively arranged on the elastic diaphragm. The air chamber and the rear air chamber also include a suction pipe arranged at the rear end, a nozzle communicated with the suction pipe and an air inlet nozzle respectively communicated with the front air chamber and the rear air chamber, and the rear movable sleeve of the inner pipe It is arranged in the suction pipe, and the elastic diaphragm is fixedly connected with the inner pipe.