CN207666761U - A kind of disposable capsulorhexis discission needle head of mark with a scale - Google Patents

Abstract

The utility model provides a disposable capsulorhexis needle with a scale mark, which comprises a needle sheath and a cystohexis needle fixed at the front end of the needle sheath. It is divided into a needle point part, a first needle bar part and a second needle bar part, the rear end of the second needle bar part is fixed on the front end of the needle cover, and an annular scale indicating part is arranged on the first needle bar part. The utility model is a disposable capsulorhexis needle with a scale mark, which can smoothly enter the eye through a small incision, is disposable, has no pollution problem, and reduces the risk of postoperative endophthalmitis. At the same time, since the needle point is for one-time use, the sharpness of the needle point can be kept, avoiding the wear and tear of the reusable instrument during use and cleaning. The capsulorhexis needle body is cylindrical, without sharp right-angled edges, which will not cause damage to the incision, and the scale mark improves the accuracy of the diameter of the capsulorhexis during operation.

Description

A disposable capsulorhexis needle with graduated marks

technical field

The utility model relates to a disposable capsulorhexis needle with a scale mark, which is used for ophthalmic cataract surgery.

Background technique

Cataract is a common blinding eye disease. Under the trend of minimally invasive cataract surgery, a continuous circular capsulorhexis with a diameter of 5.5-6 mm is very important for the successful operation of cataract surgery and the long-term stability of the intraocular lens. Success or failure will directly affect the effect of surgery. At present, the capsulorhexis forceps are mainly used in clinical practice. When using the capsulorhexis forceps, they need to be opened and closed left and right. Therefore, there are certain requirements for the size of the incision. If the incision is small, the capsulorhexis forceps cannot be fully opened, which will affect the use. In cataract surgery, when the shallow anterior chamber is encountered, there is not enough room for operation, and it is difficult to operate the capsulorhexis forceps into the anterior chamber, which may easily lead to the failure of successful capsulorhexis. In actual operation, it is also difficult to operate the capsulorhexis forceps on overmature cataract patients. When the capsulorhexis fails, the operator needs to use a self-made capsulotomy needle to change the operation method, which is time-consuming and prone to intraoperative complications. The stability of the capsule needle is poor.

At present, the capsulorhexis forceps are mainly used in clinical practice. When using the capsulorhexis forceps, they need to be opened and closed left and right. Therefore, there are certain requirements for the size of the incision. If the incision is small, the capsulorhexis forceps cannot be fully opened, which will affect the use. A continuous annular capsulorhexis opening with a diameter of 5.5-6mm is very important for the successful operation of cataract surgery and the long-term stability of the intraocular lens. Experienced operators can control the size of the capsule opening based on experience, but it is difficult for beginners to control it, especially In micro-incision cataract surgery, the diameter of capsulorhexis opening is easy to be too large or too small when using capsulorhexis forceps. At the same time, some cataract patients have shallow anterior chamber, which makes the operation space small. These are good implementation A challenge for capsulorhexis and capsulotomy. In actual operation, it is also difficult to operate the capsulorhexis forceps on overmature cataract patients. When the capsulorhexis fails, the operator needs to use a self-made capsulotomy needle to change the operation method, which is time-consuming and prone to intraoperative complications. The stability of the capsule needle is poor. However, existing cystotomy needles do not have scale marks, and the bending angle of the needle shaft is 90 degrees, which is too vertical to be unfavorable for actual operation, and is set at a right angle, which is easy to cause traction and friction with the tunnel part of the incision. It is beneficial for junior surgeons to estimate the size of capsular tear during operation, which may easily lead to too large or too small diameter of capsulorhexis.

Chinese Patent No. 201020557102.0 discloses a capsulotomy needle suitable for cataract anterior capsule, which plays a certain auxiliary role in ophthalmic cataract surgery. It is not easy to control, and the arc-shaped cutting tip is not conducive to the operator's force during the capsulorhexis process, and the controllable range is small. Chinese Patent No. 20130249674.6 discloses a fine cystotomy needle. The needle shaft has a bending angle of 90 degrees and is set at a right angle. Damage to the incision is not conducive to the healing of the wound, and the 90 degree is too vertical is also not conducive to the actual operation. The needle shaft of the current capsulotomy needle has no scale marks, which is not conducive to the junior surgeon’s estimation of the size of the capsular tear during the operation, and it is easy to cause the diameter of the capsulorhexis to be too small or too large, which is not conducive to the smooth progress of cataract surgery.

Contents of the invention

The purpose of the utility model is to solve the shortcomings of the existing capsulorhexis forceps and capsulotomy needles in continuous capsulorhexis for extracapsular cataract extraction, and to provide a simple and easy-to-control operation, high surgical success rate, low cost and easy maintenance. Disposable capsulorhexis needle with graduated mark. Capsulotomy and capsulorhexis are performed through the pointed part of the needle, the rod part does not squeeze the corneal incision, and the requirement for the size of the incision is low, which greatly reduces the difficulty of the operation and improves the success rate of the operation.

In order to achieve the above purpose, the utility model provides a disposable capsulorhexis needle with a scale mark, including a needle sheath and a capsulorhexis needle fixed at the front end of the needle sheath, characterized in that said capsulorhexis The capsule needle is divided into a needle tip part, a first needle bar part and a second needle bar part from front to back, the rear end of the second needle bar part is fixed on the front end of the needle cover, and an annular scale indicating part is arranged on the first needle bar part.

Preferably, the angle α between the first needle bar part and the second needle bar part is an obtuse angle.

More preferably, the angle α between the first needle bar part and the second needle bar part is 135°.

Preferably, the corners of the first needle bar part and the second needle bar part adopt an arc transition.

Preferably, the angle β between the needle tip portion and the first needle shaft portion is a right angle.

Preferably, the length L of the needle tip part is 1.0-1.5mm.

Preferably, the ring-shaped scale indicating part is arranged at a distance of 3 mm from the front end of the first needle bar part.

Compared with the prior art, the beneficial effects of the utility model are:

(1) A disposable capsulorhexis needle disclosed in the utility model can enter the eye through a tiny incision, and perform the capsulorhexis operation smoothly, which can improve the success rate of capsulorhexis and can be used in one time. , no daily maintenance, sterile and convenient, low cost, can improve the success rate of cataract surgery.

(2) The bending angle of the needle rod of the utility model is 135 degrees, and it is an arc-shaped obtuse angle. At the same time, there is a 3mm circular scale mark on the needle rod, which can help the operator to judge the size of the radius of the capsulorhexis and reduce the difficulty of operation for the operator. . Reduce the operation difficulty of capsulorhexis in cataract eyes with small incision or shallow anterior chamber, easy to use, improve the success rate of operation, and improve the accuracy of capsulorhexis diameter during operation. The needle tip is sharp and can quickly pierce the capsule membrane , The downward pressure on the lens is extremely small, the needle shaft is thin, the size of the incision is small, and it is not easy to squeeze the incision, which can improve the success rate of the operation.

(2) The existing capsulorhexis forceps are used for repeated disinfection, but the utility model is for disposable aseptic use, does not have the problem of pollution, and reduces the risk of postoperative endophthalmitis. At the same time, because the needle point is for one-time use, it can keep the needle point sharp, avoiding the wear and tear of the reusable instrument during use and cleaning.

(4) The design of the utility model is simple and easy to control. The slender needle rod can pass through the tiny incision below 2.0mm smoothly, which can meet the development needs of micro-incision in cataract surgery. The needle rod can easily enter the anterior chamber during capsulorhexis , and will not squeeze the incision, it is easier to operate for patients with shallow anterior chamber. The vertical needle tip makes it easier for the operator, especially beginners, to control the direction of the capsule during the capsulorhexis process, and the force is better, which can better control the process of capsulorhexis and capsulectomy. There is no need to replace the surgical instruments, the operation is convenient, the operation time is saved, the complications and the operation difficulty of the operator are reduced, and the success rate of the operation is improved. The needle shaft and needle are made of the same metal material as the 1ml needle, and the needle sleeve is made of plastic.

Description of drawings

Fig. 1 is a schematic structural view of a disposable capsulorhexis needle with scale marks.

Detailed ways

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Example

As shown in Fig. 1, the disposable capsulorhexis needle with scale mark of the present embodiment includes a needle sheath 1 and a capsulorhexis needle fixed at the front end of the needle sheath 1. After that, it is successively divided into the needle tip part 4, the first needle bar part 3 and the second needle bar part 2, the front end of the first needle bar part 3 is connected with the needle tip part 4, and the rear end of the first needle bar part 3 is connected with the second needle bar part 2, the rear end of the second needle bar part 2 is fixed to the front end of the needle cover 1, and the needle tip part 4, the first needle bar part 3 and the second needle bar part 2 are made of metal and integrally formed. An annular scale indicating part 5 is arranged on the first needle bar part 3 .

The angle α between the first needle bar part 3 and the second needle bar part 2 is 135°. The corners of the first needle bar part 3 and the second needle bar part 2 adopt an arc transition. The angle β between the needle tip portion 4 and the first needle shaft portion 3 is a right angle. The length L of the needle tip part 4 is 1mm, and it is vertically sharp, which is beneficial to the surgeon for capsulorhexis and capsulotomy. The circular scale indicating part 5 is located 3mm away from the front end of the first needle bar part 3, allowing the operator to grasp the radius of the capsulorhexis at any time.

When using, first replace the needle of the 1ml syringe with a disposable capsulorhexis needle with scale markings, then insert the needle sideways along the direction of the main incision, and use the needle tip to cut the anterior capsule in the center after entering the anterior chamber. The side edge of the needle arc cuts the anterior capsule, the span is the expected radius of capsulorhexis, and the estimated radius of capsulorhexis is marked by the 3 mm scale mark on the needle shaft. Flip the anterior capsule upwards from the lower part of the anterior edge, so that the epithelial surface faces the cornea. After forming a capsular flap, press the capsular flap gently with the spikes, and complete continuous capsulorhexis clockwise or counterclockwise. And pay attention to the same radius as the scale mark to form a round capsulorhexis opening of appropriate size, and discard the needle after the complete and continuous capsulorhexis is completed.

Claims (7)

1. A disposable capsulorhexis needle with a scale mark, comprising a needle sheath (1) and a capsule hexis needle fixed at the front end of the needle sheath (1), characterized in that said capsule hexis needle From front to back, it is divided into the needle point part (4), the first needle bar part (3) and the second needle bar part (2). The rear end of the second needle bar part (2) is fixed on the front end of the needle cover (1), An annular scale indicating part (5) is arranged on the needle bar part (3). 2. The disposable capsulorhexis needle with scale marks according to claim 1, characterized in that the angle between the first needle shaft part (3) and the second needle shaft part (2) α is an obtuse angle. 3. The disposable capsulorhexis needle with scale mark as claimed in claim 1, characterized in that, the angle between the first needle shaft part (3) and the second needle shaft part (2) α is 135°. 4. The disposable capsulorhexis needle with scale mark as claimed in claim 1, characterized in that, the corners of the first needle shaft part (3) and the second needle shaft part (2) adopt arc shape transition. 5. The disposable capsulorhexis needle with scale marks according to claim 1, characterized in that the angle β between the needle tip portion (4) and the first needle shaft portion (3) is a right angle . 6 . The disposable capsulorhexis needle with scale marks according to claim 1 , wherein the length L of the needle tip portion ( 4 ) is 1.0-1.5 mm. 7. The disposable capsulorhexis needle with scale mark according to claim 1, characterized in that, the ring-shaped scale indicating part (5) is arranged at a distance of 3 mm from the front end of the first needle shaft part (3).