CN209933163U

CN209933163U - Novel special capsulorhexis needle for cataract surgery in ophthalmology

Info

Publication number: CN209933163U
Application number: CN201920280905.7U
Authority: CN
Inventors: 唐斌
Original assignee: Chongqing Red Cross Hospital Jiangbei District People's Hospital
Current assignee: Chongqing Red Cross Hospital Jiangbei District People's Hospital
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2020-01-14
Anticipated expiration: 2029-03-06

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a novel capsulorhexis needle special for cataract surgery in ophthalmology, which is provided with a handle, a needle body and a needle point; firstly, a handle: the handle is a handheld part and is a long cylinder with the length of about 100mm and the diameter of about 4 mm; secondly, a needle body: the whole needle body is in a V shape, the included angle in the middle is 120 degrees, the total length is 10mm, the diameter is 0.2mm, the head end of the needle body is connected with the handle, the tail end is in a needle point shape, the length of the needle body connected with the head end part is 4mm, and the length of the part connected with the tail end is 6 mm; thirdly, pinpoint: the tail end of the needle body is a needle tip part which is a core part, the designed length is 0.8mm, and an included angle of 120 degrees is formed between the tail end part of the needle body, so that the whole capsulorhexis needle is Z-shaped. The tail end of the needle point is a sharp needle point, so that the capsular sac is conveniently punctured, the anterior capsular sac is cut at an angle of 120 degrees, and the opening of the capsular sac is most facilitated.

Description

Novel special capsulorhexis needle for cataract surgery in ophthalmology

Technical Field

The utility model belongs to a medical auxiliary instrument, in particular to a novel special capsulorhexis needle for ophthalmic cataract surgery.

Background

Currently, the current state of the art commonly used in the industry is such that:

cataract surgery has been in history for two thousand years, and the cataract surgery technique has been a qualitative leap in the surgical steps and the surgical effects from the initial needle extraction to the current phacoemulsification. With the continuous progress of science and technology, the incision of cataract surgery is also becoming minimally invasive. The most advanced cataract surgery today is phacoemulsification. The basic steps of this procedure are: (1) performing eyelid opening, and making a main incision and an auxiliary incision on the corneal limbus; (2) injecting viscoelastic agent, and performing continuous annular capsulorhexis (CCC) of the anterior capsule membrane of the crystal by capsulorhexis forceps; (3) separating water to free crystal nuclei; (4) the ultrasonic emulsification needle head enters the eye from the main incision to carry out ultrasonic emulsification and crushing on the crystal nucleus, and the outside of the eye is sucked; (5) pumping cortex, and polishing front and back capsule; (6) injecting viscoelastic agent, and implanting artificial lens into the capsular bag; (7) the viscoelastic is aspirated, the incision is closed, and the anterior chamber is formed. And taking the eyelid retractor, and finishing the operation.

Compared with the traditional large incision surgery of extracapsular cataract extraction, the phacoemulsification surgery incision (small incision with the diameter below 3 mm) has the advantages of ① no need of suture, short surgery time and reduction of postoperative foreign body sensation, ② good anterior chamber stability, reduction of the risk of the escape of intraocular contents, increase of intraoperative safety, ③ reduction of postoperative astigmatism, ④ small postoperative inflammatory reaction and rapid vision recovery and wound healing.

From the above cataract surgery steps we can see that Continuous Circular Capsulorhexis (CCC) is a key step in the phacoemulsification procedure, which is a prerequisite for whether phacoemulsification can be completed. The traditional surgical instrument for completing the step is capsulorhexis forceps, and the incision is generally 2-3 mm. In the operation, the limitation of a large instrument such as a capsulorhexis forceps causes the flexibility of intraocular operation to be limited, viscoelastic agent is easy to overflow due to a large incision, the difficulty of capsulorhexis operation below the incision is high, the capsulorhexis forceps are easy to fail, and the capsulorhexis forceps cannot complete the capsulorhexis operation without viscoelastic agent (incision water leakage, anterior chamber collapse), so the success rate of the operation is influenced.

In summary, the problems of the prior art are as follows:

(1) the transverse diameter of the capsulorhexis forceps is larger than that of the capsulorhexis needle, and the operation flexibility in eyes is limited; the capsulorhexis needle has small transverse diameter, small volume when entering the inside of an eye, large operation space and flexibility, and can operate technical actions which cannot be finished by capsulorhexis forceps, such as flap turning, no-sticking agent operation and the like;

(2) the capsule tearing forceps have high misoperation rate on the lower part of the incision, and are easy to tear the capsule opening to cause capsule tearing failure, so that the risk of rupture of the posterior capsule is increased, and serious complications are caused; the 120-degree sharp needle point of the capsulorhexis needle can well control the needle inserting angle, thereby better controlling the size and the shape of the capsulorhexis opening. Is particularly suitable for capsulorhexis operation below the incision;

(3) the incision is required to be 2-3mm when the capsulorhexis forceps enter the eye, so that the minimally invasive surgery with smaller incision cannot be completed. Moreover, the incision of 2-3mm is easy to overflow viscoelastic agent during operation, so that the anterior chamber collapses, and the operation of capsulorhexis cannot be completed; whereas a 2-3mm incision is less likely to complete viscoelastic-free Continuous Circular Capsulorhexis (CCC) procedures, without viscoelastic support, aqueous humor is more likely to flow out of the incision, causing rapid anterior chamber collapse and greater surgical risk. The capsulorhexis needle can control the incision of the operation to be 0.2-0.3 mm, the incision is smaller, conditions are created for implanting a more tiny incision space for the cataract intraocular lens later, relevant operation complications such as incision water leakage, intraocular infection, postoperative astigmatism and the like are avoided, in the aspect of economy, viscoelastic agents which are considered necessary before can be omitted, and considerable economic benefits can be brought on the aspect of cost control.

The difficulty and significance for solving the technical problems are as follows:

cataract surgery incisions, like all surgical incisions, are developed towards minimally invasive incisions. From the first 12mm at the large incision, progress was made to the 2mm micro incisions of today. Whereas micro-incisions below 2mm, even below 1mm, encounter bottlenecks. The main problems are the following 2 points:

1. the surgical instruments cannot have small calibers;

2. the artificial lens material cannot be used for micro-incision implantation.

First, surgical instruments for cataract surgery to access an incision are: puncture knife, washing needle, capsulorhexis forceps (or capsulorhexis needle), super-breast needle, perfusion needle, crystal implanter, crystal positioner and the like. Wherein the implantation caliber is the largest and comprises a capsulorhexis forceps, a super-breast needle, a perfusion needle and a crystal implanter. The ultra-breast needle and the perfusion needle are already made to be 1.0mm at present, and the crystal implanter is related to the second point, namely, the surgical instrument only has the factor of capsulorhexis forceps, and the capsulorhexis technology is improved, so that the problem can be solved;

secondly, the current mainstream material of the intraocular lens is acrylate, the material is soft material, the intraocular lens can be implanted after being folded, and the current minimum incision is reduced to 1 mm. The injection type artificial lens is still in the experimental stage, and a long way is needed for entering the clinic formally. The requirements for implantation are currently 1mm incision. This condition is substantially satisfied.

In conclusion, the capsulorhexis step is performed before the lens implantation step, so that the incision in the capsulorhexis step is controlled to be 0.2mm, and the incision is expanded to 1mm after the capsulorhexis step is completed, so that the subsequent steps of ultrasonic emulsification, artificial lens implantation and the like can be completed. The utility model can reduce the incision of the operation to 0.2mm level, but the operation step after capsulorhexis can not meet the requirement, and only can meet the requirement of 1mm, therefore, the standard can only be 1 mm. But a qualitative leap has been achieved with respect to the previous 2mm incision. The micro incision of 0.2mm can realize viscoelastic agent-free capsulorhexis; while 1mm micro-incisions enable two new microtechnologies for implanting an intraocular lens without viscoelastic agents. The two technologies are widely regarded as the technologies which cannot be operated without viscoelastic agents by ophthalmologists, and the technology is the most significant of the utility model.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides a novel capsulorhexis needle special for cataract surgery of ophthalmology.

The utility model belongs to the technical field of medical instruments, and discloses a novel capsulorhexis needle special for cataract surgery in ophthalmology, which is provided with a handle, a needle body and a needle point; firstly, a handle: the handle is a handheld part and is a long cylinder with the length of about 100mm and the diameter of about 4 mm; secondly, a needle body: the whole needle body is in a V shape, the included angle in the middle is 120 degrees, the total length is 10mm, the diameter is 0.2mm, the head end of the needle body is connected with the handle, the tail end is in a needle point shape, the length of the needle body connected with the head end part is 4mm, and the length of the part connected with the tail end is 6 mm; thirdly, pinpoint: the tail end of the needle body is a needle tip part which is a core part, the designed length is 0.8mm, and an included angle of 120 degrees is formed between the tail end part of the needle body, so that the whole capsulorhexis needle is Z-shaped. The tail end of the needle point is a sharp needle point, the capsulorhexis is conveniently punctured, the 120-degree angle is used for cutting off the front capsulorhexis, the capsulorhexis is most favorably turned over, the capsulorhexis is the first step of capsulorhexis and is the most important step, the 120-degree needle point is used for annularly tearing the capsule, the trend of the capsulorhexis is more favorably controlled, particularly, the capsule tearing position with the largest difficulty recognized by an operator, namely the capsule tearing position below the notch is difficult to complete due to the angle problem, the standard annular capsule tearing can be hardly completed, and the 120-degree sharp needle point of the capsulorhexis needle can well control the needle inserting angle, so that the size and the shape of a capsule tearing opening can be better. The utility model discloses can make the operation incision control at 0.2-0.3 mm from 2-3mm, the incision is littleer, for cataract intraocular lens implants more tiny incision space in the future and has created the condition, has avoided relevant operation complication simultaneously, if the incision leaks, intraocular infection, postoperative astigmatism etc. in the aspect of economy, can not use before think essential viscoelastic agent, will bring considerable economic benefits in cost control.

To sum up, the utility model discloses an innovation point and positive effect do:

1. the incision is small, can be controlled to be 0.2-0.3 mm, and is reduced by 10 times compared with the traditional incision;

2. the aqueous humor in the eyes is not easy to overflow, and the controllability of the capsulorhexis operation is increased due to the stable anterior chamber;

3. the operation is more flexible and changeable, and can be operated by a single hand or two hands. The double capsulorhexis needle is operated by two hands (respectively enters the eye from the main incision and the auxiliary incision), the operation space is larger and more flexible, and the success rate of capsulorhexis is increased;

4. the turning of the front capsular flap is the most critical step of capsulorhexis by a capsulorhexis needle, and the 120-degree needle point is more beneficial to turning the front capsular flap;

5. because the incision is tiny and is in a watertight state, the condition of water leakage cannot occur in the capsulorhexis operation, and therefore the viscoelastic agent-free capsulorhexis operation which cannot be completed by the traditional capsulorhexis forceps can be completed.

The utility model discloses can make the operation incision control at 0.2-0.3 mm from 2-3mm, the incision is littleer, for cataract intraocular lens implants more tiny incision space in the future and has created the condition, has avoided relevant operation complication simultaneously, if the incision leaks, intraocular infection, postoperative astigmatism etc. in the aspect of economy, can not use before think essential viscoelastic agent, will bring considerable economic benefits in cost control.

Drawings

Fig. 1 is a schematic structural view of a novel capsulorhexis needle dedicated for cataract surgery in ophthalmology according to an embodiment of the present invention;

in the figure: 1. a needle body; 2. a needle tip; 3. a handle.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

As shown in fig. 1, the novel capsulorhexis needle for cataract surgery in ophthalmology provided by the embodiment of the utility model comprises: a needle body 1, a needle point 2 and a handle 3.

The needle body 1 is V-shaped, the head end is provided with a needle point 2 which is formed integrally, and the tail end of the needle body 1 is provided with a handle 3. The length of the needle point 2 is 0.8mm, and an included angle of 120 degrees is formed between the needle point and the needle body 1. The bending handle 3 and the needle body 1 form an included angle of 120 degrees, so that the whole needle body 1 is Z-shaped.

As a preferred embodiment, a 1ml disposable empty needle is adopted as the needle body 1.

During the use, can hold between the fingers handle 3 and get into whole needle point 2 and partial needle body 1 anterior chamber with the finger and operate, can hold one with the one hand and operate, also can hold one operation use respectively by both hands, change the restriction of one-hand operation in the past, two tear bag needle two-hand operation, operating space is bigger, and is more nimble, has increased the success rate of tearing the bag.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. A novel capsulorhexis needle special for ophthalmic cataract surgery is characterized in that the novel capsulorhexis needle special for ophthalmic cataract surgery is provided with a handle, a needle body and a needle point, the head end of the needle body is connected with the handle, and the tail end of the needle body is integrally provided with the needle point;

the included angle between handle and the needle body is 120 degrees, the included angle between needle body and the needle point is 120 degrees.

2. The novel capsulorhexis needle special for ophthalmic cataract surgery as claimed in claim 1, wherein the handle has a length of 100mm and a diameter of 4 mm; the length of the needle body is 10mm, and the diameter of the needle body is 0.2 mm; the length of the needle tip is 0.8 mm.