CN112515845A

CN112515845A - Crystal nucleus delivery device for cataract surgery

Info

Publication number: CN112515845A
Application number: CN202011527636.3A
Authority: CN
Inventors: 杨军; 田芳; 王秀
Original assignee: TIANJIN MEDICAL UNIVERSITY EYE HOSPITAL
Current assignee: TIANJIN MEDICAL UNIVERSITY EYE HOSPITAL
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-03-19

Abstract

The present invention relates to the field of medical devices. The lens nucleus delivery device for the cataract surgery, which can realize gradual clamping, comprises a central tube, wherein the top end of the central tube is provided with an elastic balloon which is communicated with the central tube; the lower end of the central tube is provided with a negative sucker which is communicated with the central tube; a buffer cylinder is arranged outside the sleeve below the sliding pipe, and the upper end opening and the lower end of the buffer cylinder are closed; the lower end of the sliding pipe extends into the space between the buffer cylinder and the sleeve pipe and forms sliding fit; two air leakage holes are further formed in the two sides of the bottom of the buffer cylinder. The invention can buffer the elastic force application of the spiral spring, so that the action of the curved rod shows the clamping trend of fast → slow → continuous slow, and the curved rod is prevented from directly damaging the crystal nucleus after the spiral spring is released.

Description

Crystal nucleus delivery device for cataract surgery

Technical Field

The invention relates to the field of medical instruments, in particular to a crystal nucleus remover for cataract surgery.

Background

Cataract is one of the most common blinding eye diseases, cornea and crystalline lens are the most main refractive structures of human eyes, the crystalline lens is transparent under normal conditions, light reaches retina through the crystalline lens and other refractive media to see external objects clearly, once the crystalline lens is turbid for some reasons, the retinal image is influenced, people cannot see clearly, namely, the cataract is generated due to vision reduction caused by the turbid crystalline lens. Surgery is the only effective treatment means for cataract at present. Cataract surgery typically employs a clear corneal micro-incision phacoemulsification to remove the clouded lens. However, if the corneal endothelium count of the patient is low, the patient has hyperscleroma, hemiluxation of the crystalline lens, or rupture of the posterior capsule in the hypermastectomy, the patient no longer has the condition of hypermastrosis, and the crystalline lens nucleus needs to be delivered manually. The existing lens nucleus remover cannot ensure the use effect, can cause the cataract lens nucleus to fall off, can cause secondary injury once falling into a vitreous cavity, influences the progress of cataract surgery, even can cause serious complications such as intraocular inflammation and retinal detachment, and causes great threat to the recovery of visual function of a patient.

Therefore, the prior art has seen a mode of fixing the crystal nucleus by auxiliary clamping, see the chinese utility model patent with patent number 202020147748.5, disclosing a device for delivering cataract crystal nucleus, which is adsorbing and dragging out a certain distance, then through releasing the spring, the spring drives the short tube to move downwards, and then the short tube diagonal rod drives the driving rod to move, thereby clamping the crystal nucleus, realizing auxiliary clamping and preventing the crystal nucleus from dropping. Then, the spring is directly driven by the spring, so that the moment when the spring is applied is too large, the bent rod easily hits the crystal nucleus, the crystal nucleus is damaged, subsequent pathological research is influenced, and even the crystal nucleus is directly smashed in serious conditions, so that fragments fall off, and the delivery is influenced.

Disclosure of Invention

The invention aims to provide a crystal nucleus remover for cataract surgery, which can realize gradual shrinkage and clamping.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a crystal nucleus remover for cataract surgery comprises a central tube, wherein the top end of the central tube is provided with an elastic balloon which is communicated with the central tube; the lower end of the central tube is provided with a negative sucker which is communicated with the central tube;

a sleeve is fixedly sleeved outside the central tube, a first end is arranged at the upper end of the sleeve, a sliding tube which is in sliding fit with the sleeve is further sleeved outside the sleeve, a second end is arranged at the upper end of the sliding tube, a spiral spring is sleeved outside the sleeve between the first end and the second end, and two ends of the spiral spring are abutted against the first end and the second end; a crank arm is further arranged on the side surface of the first end, and a stop block is arranged on the side surface of the second end; the middle part of the crank arm is hinged with the first end, the lower part of the crank arm is provided with a hook, and the position of the stop block is opposite to the hook;

two curved bars are correspondingly arranged on two sides of the negative pressure sucker, the middle section of each curved bar is hinged with the edges of two sides of the negative pressure sucker through a short bar, the upper end of each curved bar is hinged with the lower end of a connecting rod, and the upper end of each connecting rod is hinged with a connecting seat which is fixedly arranged below the second end and on the side wall of the sliding pipe;

a buffer cylinder is arranged outside the sleeve below the sliding pipe, and the upper end opening and the lower end of the buffer cylinder are closed; the lower end of the sliding pipe extends into the space between the buffer cylinder and the sleeve pipe and forms sliding fit; two air leakage holes are also formed in the two sides of the bottom of the buffer cylinder; the lower extreme of slip pipe is provided with two vertical shutoff poles corresponding to the disappointing hole, the shutoff pole comprises the hypomere of large size upper segment and lower size, and the upper segment of shutoff pole is from lower to upper thickening gradually.

Preferably, the inner side wall of the sliding pipe is provided with a guide block, the outer side wall of the sleeve is provided with a vertical guide groove matched with the guide block, and the guide block is clamped in the guide groove.

Preferably, the central tube above the sleeve is fixedly provided with an installation block, one side of the installation block is provided with a handle, and the handle is positioned above the crank arm.

Preferably, the mounting block is connected with the sleeve through a reinforcing rod, the reinforcing rod is provided with a plurality of reinforcing short rods, and the plurality of reinforcing short rods are distributed uniformly in an annular shape.

The beneficial effects of the invention are concentrated and expressed as follows: the elastic force application of the spiral spring can be buffered, so that the action of the curved rod shows a clamping trend of fast → slow → continuous slow, and the curved rod is prevented from directly damaging the crystal nucleus after the spiral spring is released. Specifically, in the using process, the elastic saccule is firstly extruded, the negative pressure sucking disc is used for contacting with the crystal nucleus, then the elastic saccule is applied, the negative pressure generated by the elastic saccule is used for carrying out adsorption and dragging on the crystal nucleus, and after the crystal nucleus is delivered for a certain distance. The crank arm is buckled by the fingers, the crank arm hook is separated from the stop block, at the moment, the sliding pipe moves downwards under the action of the spiral spring, and then the connecting rod drives the crank rod to rotate to clamp the crystal nucleus, so that the crystal nucleus is prevented from falling. Therefore, the clamping speed of the curved bar is completely dependent on the downward moving speed of the sliding tube.

In the process that the sliding pipe moves downwards, the gas in the buffer cylinder needs to be discharged, the gas release hole is completely opened at the front section of the sliding pipe moving downwards, and at the moment, the gas in the buffer cylinder can be smoothly discharged without influencing the normal movement of the sliding pipe. Along with the downward movement of the sliding tube, the small-sized lower section of the plugging rod starts to enter the air leakage hole, the air leakage amount of the air leakage hole is reduced, the downward movement speed of the sliding tube is slowed down until the large-sized section of the plugging rod starts to enter the air leakage hole, the air leakage amount of the air leakage hole is further gradually reduced, and finally the gradually closed form is presented.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

As shown in fig. 1-2, a crystal nucleus remover for cataract surgery comprises a central tube 1, wherein an elastic balloon 2 is arranged at the top end of the central tube 1, and the elastic balloon 2 is communicated with the central tube 1. The lower end of the central tube 1 is provided with a negative pressure sucker 3, the negative pressure sucker 3 is communicated with the central tube 1, in the adsorption initial stage, the use mode of the invention is the same as that of the traditional adsorption type delivery device, and the negative pressure is generated by extruding the elastic saccule 2 for adsorption.

The crystal nucleus clamping device is characterized in that a sleeve 4 is fixedly sleeved outside the central tube 1, the sleeve 4 is usually directly bonded and fixed with the central tube 1, a first end 5 is arranged at the upper end of the sleeve 4, a sliding tube 6 which is in sliding fit with the sleeve 4 is further sleeved outside the sleeve 4, the sliding tube 6 can move up and down along the sleeve 4, the sliding tube 6 moves to drive auxiliary clamping of a crystal nucleus, in order to improve the moving stability of the sliding tube 6, a guide block is arranged on the inner side wall of the sliding tube 6, a vertical guide groove which is matched with the guide block and is arranged on the outer side wall of the sleeve 4, and the guide block is clamped in the guide groove. Specifically, two bent rods 12 are correspondingly arranged on two sides of the negative pressure sucker 3, the middle section of each bent rod 12 is hinged to the edges of two sides of the negative pressure sucker 3 through a short rod 13, the upper end of each bent rod 12 is hinged to the lower end of a connecting rod 14, and the upper end of each connecting rod 14 is hinged to a connecting seat 15 fixedly arranged below the second end 7 and on the side wall of the sliding tube 6.

As for how to drive the sliding tube 6, the invention adopts the technical scheme that the upper end of the sliding tube 6 is provided with a second end 7, a spiral spring 8 is sleeved outside the sleeve 4 between the first end 5 and the second end 7, and two ends of the spiral spring 8 are abutted against the first end 5 and the second end 7. After the sliding tube 6 moves up, the elastic potential energy can be accumulated by compressing the coil spring 8, and further the elastic potential energy can be used as the driving force of the sliding tube 6. As for how to lock the sliding tube 6, the side of the first end 5 is further provided with a crank arm 9, and the side of the second end 7 is provided with a stopper 10. The middle part of the crank arm 9 is hinged to the first end 5, the lower part of the crank arm 9 is provided with a hook 11, the position of the stop block 10 is opposite to the hook 11, the stop block 10 is constructed through the hook 11 to realize locking, and certainly, in order to ensure the stability of the locking, the hinged position of the crank arm 9 can be provided with a torsion spring.

The biggest difference of the present invention is that, as shown in fig. 2, a buffer cylinder 16 is further arranged outside the sleeve 4 below the sliding tube 6, and the upper end of the buffer cylinder 16 is open and the lower end is closed. The lower end of the sliding tube 6 extends into the space between the buffer cylinder 16 and the sleeve 4 and forms sliding fit. Two air release holes 17 are also arranged on two sides of the bottom of the buffer cylinder 16. The lower end of the sliding tube 6 is provided with two vertical plugging rods 18 corresponding to the air leakage holes 17, each plugging rod 18 consists of an upper section with a large size and a lower section with a lower size, and the upper section of each plugging rod 18 is gradually thickened from bottom to top.

In the using process, the elastic saccule 2 is firstly extruded, the negative pressure sucker 3 is used for contacting with the crystal nucleus, then the elastic saccule 2 is applied, the negative pressure generated by the elastic saccule 2 is used for carrying out adsorption and dragging on the crystal nucleus, and after the crystal nucleus is delivered for a certain distance. The crank arm 9 is buckled by fingers, the hook 11 of the crank arm 9 is separated from the stop block 10, at the moment, under the action of the spiral spring 8, the sliding tube 6 moves downwards, and then the connecting rod 14 drives the crank rod 12 to rotate to clamp the crystal nucleus, so that the crystal nucleus is prevented from falling. Therefore, the clamping speed of the curved bar 12 is completely dependent on the downward moving speed of the slide tube 6.

In the process that the sliding tube 6 moves downwards, the gas in the buffer cylinder 16 needs to be discharged, the gas release hole 17 is completely opened when the sliding tube 6 moves downwards to the front section, and at the moment, the gas in the buffer cylinder 16 can be smoothly discharged without influencing the normal movement of the sliding tube 6. Along with the downward movement of the sliding tube 6, the small-sized lower section of the blocking rod 18 starts to enter the air release hole 17, the air release amount of the air release hole 17 is reduced, the downward movement speed of the sliding tube 6 is slowed down until the large-sized section of the blocking rod 18 starts to enter the air release hole 17, and the air release amount of the air release hole 17 is further gradually reduced, so that the gradually closed form is finally presented.

In order to facilitate the operation, the present invention should also be provided with a holding component, specifically, an installation block 19 is fixedly arranged outside the central tube 1 above the sleeve 4, one side of the installation block 19 is provided with a handle 20, and the handle 20 is located above the crank arm 9. In order to improve the connection strength of the mounting block 19 on the central tube 1, the mounting block 19 and the sleeve 4 are connected through a reinforcing rod 21, the reinforcing rod 21 is provided with a plurality of reinforcing short rods 13 which are uniformly distributed in an annular shape.

Claims

1. A crystal nucleus remover for cataract surgery comprises a central tube (1), wherein an elastic balloon (2) is arranged at the top end of the central tube (1), and the elastic balloon (2) is communicated with the central tube (1); the lower end of the central pipe (1) is provided with a negative pressure sucker (3), and the negative pressure sucker (3) is communicated with the central pipe (1);

the method is characterized in that: a sleeve (4) is fixedly sleeved outside the central tube (1), a first end (5) is arranged at the upper end of the sleeve (4), a sliding tube (6) which is in sliding fit with the sleeve (4) is further sleeved outside the sleeve (4), a second end (7) is arranged at the upper end of the sliding tube (6), a spiral spring (8) is sleeved outside the sleeve (4) between the first end (5) and the second end (7), and two ends of the spiral spring (8) are abutted against the first end (5) and the second end (7); a crank arm (9) is further arranged on the side surface of the first end head (5), and a stop block (10) is arranged on the side surface of the second end head (7); the middle part of the crank arm (9) is hinged with the first end (5), the lower part of the crank arm (9) is provided with a hook (11), and the position of the stop block (10) is opposite to the hook (11);

two bent rods (12) are correspondingly arranged on two sides of the negative pressure sucker (3), the middle section of each bent rod (12) is hinged to the edges of two sides of the negative pressure sucker (3) through a short rod (13), the upper end of each bent rod (12) is hinged to the lower end of a connecting rod (14), and the upper end of each connecting rod (14) is hinged to a connecting seat (15) fixedly arranged below the second end (7) and on the side wall of the sliding pipe (6);

a buffer cylinder (16) is further arranged outside the sleeve (4) below the sliding pipe (6), and the upper end opening and the lower end of the buffer cylinder (16) are closed; the lower end of the sliding pipe (6) extends into the space between the buffer cylinder (16) and the sleeve (4) and forms sliding fit; two air release holes (17) are also formed in the two sides of the bottom of the buffer cylinder (16); the lower extreme of slip pipe (6) corresponds snuffle hole (17) and is provided with two vertical shutoff poles (18), shutoff pole (18) comprise the upper segment of large size and the hypomere of size down, and the upper segment of shutoff pole (18) is by lower supreme thickening gradually.

2. The lens nucleus remover for cataract surgery of claim 1, wherein: the inner side wall of the sliding pipe (6) is provided with a guide block, the outer side wall of the sleeve (4) is provided with a vertical guide groove matched with the guide block, and the guide block is clamped in the guide groove.

3. The lens nucleus remover for cataract surgery according to claim 2, characterized in that: the outer fixed mounting block (19) that is provided with of center tube (1) above sleeve pipe (4), one side of mounting block (19) is provided with handle (20), handle (20) are located the top of turning arm (9).

4. The lens nucleus remover for cataract surgery according to claim 3, wherein: the mounting block (19) is connected with the sleeve (4) through a reinforcing rod (21), the reinforcing rod (21) is provided with a plurality of reinforcing short rods (13) which are uniformly distributed in an annular shape.