CN212853531U

CN212853531U - Intraocular retina proliferation membrane sampler

Info

Publication number: CN212853531U
Application number: CN202020694367.9U
Authority: CN
Inventors: 于伟泓
Original assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Current assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-04-02
Anticipated expiration: 2030-04-29

Abstract

The utility model discloses an intraocular retina proliferation membrane sampler, it includes: the outer shell comprises an outer needle head and an outer needle barrel, and the outer needle head and the outer needle barrel are both hollow; the inner needle is hollow and comprises an inner needle head and an inner needle cylinder, the inner needle head is sleeved in the outer needle head, the end part of the inner needle head is provided with a flexible sucker, the inner needle cylinder is sleeved in the outer needle cylinder, and the tail end of the inner needle cylinder is connected with a push rod; the tail end of the outer needle cylinder is connected with a negative pressure source; the tail end of the push rod extends out of the outer needle cylinder to form a push handle, and the push rod pushes the inner needle to enable the flexible sucker to extend out of or retract into the outer needle. The utility model has the advantages of simple structure, safety and reliability, and can enter the eyes through the minimally invasive incision and adsorb the proliferation membrane through the flexible sucker, so as to bring the beneficial effect of taking out the proliferation membrane quickly.

Description

Intraocular retina proliferation membrane sampler

Technical Field

The utility model relates to an ophthalmic surgical instrument. More specifically, the present invention relates to an intraocular retinal proliferation membrane sampler.

Background

The basic functions of vitrectomy are to remove turbid vitreous or to remove vitreoretinal traction, restore clear refractive interstitium and promote retinal replacement, and to treat vitreoretinal disease to restore visual function to the patient. In the existing 20G vitrectomy, when the operation of taking out the retina proliferation membrane is needed, medical personnel directly use the retina forceps to cut along the 20G sclera and directly grab out the outside of the eye. At present, in the times of minimally invasive vitrectomy of 23G, 25G and 27G, minimally invasive incisions are small, most of proliferation membranes cannot be taken out through wounds by retinal forceps, and special sampling tools are urgently needed.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.

It is still another object of the present invention to provide an intraocular retinal proliferation membrane sampler which can enter the eye through a minimally invasive incision and adsorb the proliferation membrane through a flexible suction cup so as to take out the proliferation membrane quickly.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an intraocular retinal proliferation membrane sampler including:

the outer shell comprises an outer needle head and an outer needle barrel, and the outer needle head and the outer needle barrel are both hollow;

the inner needle is hollow and comprises an inner needle head and an inner needle cylinder, the inner needle head is sleeved in the outer needle head, the end part of the inner needle head is provided with a flexible sucker, the inner needle cylinder is sleeved in the outer needle cylinder, and the tail end of the inner needle cylinder is connected with a push rod; the tail end of the outer needle cylinder is connected with a negative pressure source; the tail end of the push rod extends out of the outer needle cylinder to form a push handle, and the push rod pushes the inner needle to enable the flexible sucker to extend out of or retract into the outer needle. In an initial state, the flexible sucker is kept in the outer needle head; after the outer needle head passes through the minimally invasive incision, the flexible sucker extends out of the outer needle head by utilizing the push rod, and the flexible sucker opens and adsorbs a proliferation membrane so as to be convenient for quick excision. And after the excision is finished, the flexible sucker is retracted, and the intraocular retinal proliferation membrane sampler is pulled out.

Preferably, the intraocular retinal proliferation membrane sampler further comprises: and the filter screen is arranged in the inner needle cylinder, and the edge of the filter screen extends along the whole peripheral wall of the inner needle cylinder.

Preferably, the flexible sucker is funnel-shaped, the neck of the flexible sucker is fixed at the end part of the inner needle, and the head of the flexible sucker is opened when the inner needle is in an extending state.

Preferably, the housing is provided with an L-shaped hole, the push handle is accommodated in the L-shaped hole, and a transverse arm of the L-shaped hole is close to the outer needle head.

Preferably, the longitudinal wall of said L-shaped hole is parallel to the axis of said outer needle cylinder, the length of the longitudinal wall of said L-shaped hole being greater than the length of said flexible suction cup.

Preferably, the push rod is a rod-shaped member extending from the side wall of the inner needle cylinder, the push rod extends along the inner wall of the outer needle cylinder, and the push handle extends out of the outer wall of the outer needle cylinder perpendicular to the push rod.

Preferably, the push rod is also cylindrical and formed by extending the inner needle cylinder, and the push rod is perpendicular to the outer wall of the push rod and extends to the outer wall of the outer needle cylinder.

Preferably, the tail end of the outer needle cylinder is also connected with an air pipe, and the air pipe is connected with a negative pressure source.

Preferably, the flexible sucker is made of a transparent silicone material.

The utility model discloses at least, include following beneficial effect: the utility model discloses an intraocular retina proliferation membrane sampler is in the top of interior syringe needle sets up flexible sucking disc, flexible sucking disc is accomodate under initial condition in the outer syringe needle, can guarantee the sampler can get into intraocular through the small wound of wicresoft's operation. After the eye is in the eye, the flexible sucker can be opened after extending out of the outer needle, for example, the flexible sucker can be in an umbrella shape or a funnel shape, so that the contact area of the inner needle and the proliferation membrane can be enlarged, the excised proliferation membrane can be conveniently and rapidly peeled off and sucked out, and the sampling is completed. The intraocular retina proliferation membrane sampler has simple structure, convenient operation, quick and reliable operation, and effectively improves the medical safety and efficiency.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic diagram of an intraocular retinal proliferation membrane sampler according to one embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a part of the structure of an intraocular retinal proliferation membrane sampler according to one embodiment of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 and 2, the present invention provides an intraocular retinal proliferation membrane sampler, which includes:

the outer needle comprises a shell, a needle holder and a needle holder, wherein the shell comprises an outer needle head 101 and an outer needle holder 102, and the outer needle head 101 and the outer needle holder 102 are both hollow; the outer diameter of the outer needle 101 is, for example, 0.5mm or 0.6mm to fit the current size of 23G or 25G glass incisions.

The inner needle comprises an inner needle head 201 and an inner needle cylinder 202, the inner needle head 201 is sleeved in the outer needle head 101, the end of the inner needle head is provided with a flexible sucker 300, the inner needle cylinder 202 is sleeved in the outer needle cylinder 102, the tail end of the inner needle cylinder is connected with a push rod 203, the push rod 203 pushes the inner needle head 201 to enable the flexible sucker 300 to extend out or retract into the outer needle head 101, and the tail end of the push rod 203 extends out of the outer needle cylinder 102 to form a push handle 204. The tail end of the outer needle cylinder 101 is connected with a negative pressure source; in the initial state, the flexible suction cup 300 remains inside the outer needle 101; after the outer needle 101 enters into the eye through a minimally invasive incision, the flexible sucker 300 disc extends out of the outer needle 101 by using the push rod 203, the flexible sucker 300 is opened, a negative pressure source is started, and the flexible sucker 300 sucks the cut proliferation membrane, so that the proliferation membrane is conveniently drawn out for storage. And then, the flexible sucker 300 is retracted, and the intraocular retinal proliferation membrane sampler is pulled out. The housing is, for example, integrally formed and made of a disposable material. The inner needle is sleeved in the housing and can slide along the inner wall of the housing, so that the flexible sucker 300 can be switched between a retraction state at the beginning and an extension state at work. The push handle 204 is arranged on the outer wall of the outer needle cylinder 102, so that the medical staff can easily push the push handle 204 with the index finger or thumb when holding the hand, thereby quickly switching the flexible suction cup 300 in different states. Intraocular retina proliferation membrane sampler is applicable to various ophthalmology minimal access surgeries, to the small wound of wicresoft, can the accuracy get into in the eye, and the proliferation membrane in accurate excision extraction eye can realize taking a sample fast, improves operation security and efficiency.

In one embodiment, as shown in fig. 1, the intraocular retinal proliferation membrane sampler further comprises: a strainer 205 disposed inside the inner cylinder 201, wherein an edge of the strainer 205 extends along the entire circumferential wall of the inner cylinder 201. Thus, the filter screen 205 is disposed within the inner cylinder 201 for filtering and retaining the excised proliferation membrane within the inner cylinder 201 for subsequent removal to a sample vial for storage.

In one embodiment, as shown in fig. 1, the flexible suction cup 300 is funnel-shaped, the neck of the flexible suction cup 300 is fixed at the end of the inner needle 201, and the head of the flexible suction cup 300 is opened when the inner needle 201 is extended. The neck of the flexible suction cup 300 is, for example, sleeved on the end of the inner needle 201, and can be fixed on the end of the inner needle 201 by ultrasonic welding, and the flexible suction cup 300 is communicated with the inner needle 201 and is used for sucking the cut proliferation membrane into the inner needle cylinder 202 by negative pressure. The flexible suction cup 300 is, for example, a thin film having a small thickness, and the flexible suction cup 300 has a certain elasticity, thereby being stably held in the outer needle 101 when retracted and being rapidly opened when extended. Of course, the flexible suction cup 300 can also be opened to form an umbrella shape and fixed at the end of the inner needle 201 by welding or adhering. The flexible suction cup 300 can enlarge the contact area between the inner needle 201 and the proliferation membrane of the retina in the eye, and increase the negative pressure so as to be convenient for quickly stripping and sucking out the removed proliferation membrane.

In one embodiment, as shown in fig. 2, the housing defines an L-shaped hole 103, the push handle 204 is received in the L-shaped hole 103, and a transverse arm of the L-shaped hole 103 is close to the outer needle 101. Initially, the push handle 204 is held at the top end of the longitudinal arm of the L-shaped hole 103, and after the sampler enters the eye, the push handle 204 is pushed to move along the L-shaped hole 103 to the top end of the transverse arm, so as to position the inner needle 201. The utility model discloses a simple L type hole is as locking mechanical system, stable in structure, and the effect is reliable, effectively avoids when switch-on negative pressure source utilizes the negative pressure to extract the sample, interior syringe needle 201 is by the condition of unexpected withdrawal.

In one embodiment, as shown in fig. 2, the longitudinal wall of the L-shaped hole 103 is parallel to the axis of the outer needle cylinder 102, and the length of the longitudinal wall of the L-shaped hole 103 is greater than the length of the flexible suction cup 300. Thereby, it is ensured that the flexible suction cup 300 can be completely released. L type hole 103 is along the parallel sampler axis sets up, can improve the convenience of operation.

In one embodiment, as shown in FIG. 2, the plunger 203 is a rod-shaped member extending from the sidewall of the inner barrel 102, the plunger 203 extends along the inner wall of the outer barrel 102, and the handle 204 extends out of the outer wall of the outer barrel 102 perpendicular to the plunger 203. The plunger 203 may also be implemented by other mechanisms capable of pushing the inner syringe 202 to slide along the inner wall of the outer syringe 102.

In one embodiment, as shown in fig. 1, it is preferable that the push rod 203 is cylindrical and is formed by extending the inner cylinder 202, and the push handle 204 is perpendicular to the outer wall of the push rod 203 and extends to the outer wall of the outer cylinder 202. The inner needle cylinder 202 and the push rod 203 are integrally formed, so that the processing difficulty can be reduced, and the structural stability is improved. The push handle 204 is arranged on the outer wall of the inner needle cylinder 202.

In one embodiment, as shown in fig. 1 and 2, an air tube 400 is further connected to the rear end of the outer cylinder 102, and the air tube 400 is connected to a negative pressure source. The air tube 400 is used, for example, with a conventional transparent hose for connecting the sampler to a source of negative pressure, such as an air pump.

In one embodiment, as shown in FIG. 1, the flexible suction cup 300 is made of a transparent silicone material. The flexible suction cup 300 is made of transparent silica gel material with certain thickness and elasticity, and can be rapidly opened when the inner needle 201 extends out, and can be conveniently contracted into the outer needle 101 when the inner needle retracts after sampling, so that the operation efficiency is improved.

When the device is used, a medical worker holds the outer needle cylinder 102, extends the outer needle 101 into an eye along a scleral incision, then pushes the push handle 204 to push the inner needle 201 out, the flexible suction cup 300 is opened at the moment and is aligned to a sampling part, after a negative pressure source is started, the flexible suction cup 300 can adsorb the cut proliferation membrane and peel off a vitreous body, and the proliferation membrane is sucked to the filter screen 205 under the action of negative pressure to be stored. The sampler can then be withdrawn by retracting the inner needle 201 into the outer needle 101, completing the sampling operation.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. An intraocular retinal proliferation membrane sampler, comprising:

the inner needle is hollow and comprises an inner needle head and an inner needle cylinder, the inner needle head is sleeved in the outer needle head, the end part of the inner needle head is provided with a flexible sucker, the inner needle cylinder is sleeved in the outer needle cylinder, and the tail end of the inner needle cylinder is connected with a push rod; the tail end of the outer needle cylinder is connected with a negative pressure source; the tail end of the push rod extends out of the outer needle cylinder to form a push handle, and the push rod pushes the inner needle to enable the flexible sucker to extend out of or retract into the outer needle.

2. The intraocular retinal proliferation membrane sampler of claim 1, further comprising: and the filter screen is arranged in the inner needle cylinder, and the edge of the filter screen extends along the whole peripheral wall of the inner needle cylinder.

3. The intraocular retinal proliferation membrane sampler of claim 1, wherein the flexible suction cup is funnel shaped, a neck of the flexible suction cup is fixed to an end of the inner needle, and a head of the flexible suction cup is flared in an extended state of the inner needle.

4. The intraocular retinal proliferation membrane sampler of claim 1 in which the housing defines an L-shaped aperture, the push handle being received in the L-shaped aperture, the transverse arm of the L-shaped aperture being adjacent the outer needle.

5. The intraocular retinal proliferation membrane sampler of claim 4, wherein the longitudinal wall of the L-shaped hole is parallel to the axis of the outer barrel, the length of the longitudinal wall of the L-shaped hole being greater than the length of the flexible suction cup.

6. The intraocular retinal proliferation membrane sampler of claim 1, wherein the push rod is a rod-like member extending from a sidewall of the inner barrel, the push rod extending along an inner wall of the outer barrel, and the push handle extending out of an outer wall of the outer barrel perpendicular to the push rod.

7. The intraocular retinal proliferation membrane sampler of claim 1, wherein the push rod is cylindrical and is elongated from the inner barrel, the push rod being perpendicular to an outer wall of the push rod and extending to an outer wall of the outer barrel.

8. The intraocular retinal proliferation membrane sampler of claim 1, wherein the tail end of the outer barrel is further connected to an air tube, and the air tube is connected to a negative pressure source.

9. The intraocular retinal proliferation membrane sampler of claim 3, wherein the flexible suction cup is made of a transparent silicone material.