CN111000679A

CN111000679A - Capsule cutting device for cataract surgery

Info

Publication number: CN111000679A
Application number: CN202010078733.2A
Authority: CN
Inventors: 谷昌德
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-03
Filing date: 2020-02-03
Publication date: 2020-04-14

Abstract

The invention relates to the technical field of medical instruments, and mainly solves the technical problems that: how to prevent the anterior capsule from being torn when cutting the membrane and improve the operation quality. The invention relates to a cyst cutting device for cataract surgery, which comprises a rotary drum, a push rod and an arc-shaped blade for cutting a front cyst membrane; the push rod is used for being matched with the rotary drum in an inserting mode, and the central lines of the push rod and the rotary drum are overlapped; the number of the arc-shaped blades is more than two, the arc-shaped blades are circularly distributed around the central line, and each arc-shaped blade is connected with the rotary drum through an elastic sheet; the push rod can extend and retract relative to the rotary drum; each elastic sheet is used for being pushed by the push rod to drive the corresponding arc-shaped blade to move at the same time along the direction far away from the central line in an equal amplitude manner. The diameter of the circle formed by the arc-shaped blades in a surrounding manner is adjustable, so that the arc-shaped blades can conveniently extend into the eyes of a patient from a small surgical incision to perform a capsulotomy operation; and because the front capsular is cut by rotating each arc-shaped blade, a round front capsular can be cut, the cutting quality is better, and the front capsular cannot be torn.

Description

Capsule cutting device for cataract surgery

Technical Field

The invention relates to the technical field of medical instruments, in particular to a capsulotomy device for cataract surgery.

Background

Cataracts are the most common cause of blindness and visual disability. The cataract is mainly treated by operation clinically, and the cure rate is higher. Anterior capsule resection is one of the most critical steps in cataract extraction. In the prior art, the diameter of the pre-lens capsule is about 5mm, and the size of the surgical incision is about 3.2mm, so that a knife larger than 3.2mm cannot be inserted into the eye during the capsule tearing process, and a capsule cutting device for cataract surgery is generally used for easier surgery through the small-sized surgical incision.

As shown in fig. 1, patent No. CN102512284B discloses a capsulotomy device for cataract surgery, which comprises a blade 1, a tubular knife bar 3 and a control component, wherein the blade 1 is made of elastic metal material, one end of the blade 1 is a fixed end 11, the fixed end 11 is fixedly connected to the front end of the tubular knife bar 3, the other end of the blade 1 is a free end 12, the free end 12 extends into the tubular knife bar 3 from the front opening of the tubular knife bar 3 in a sliding fit manner, and the blade 1 is bent into a ring-shaped structure. The control assembly can control the free end 12 of the blade 1 to slide back and forth along the tubular cutter bar 3, so that the diameter of the annular structure formed by the blade 1 can be adjusted. Wherein, because the blade 1 adopts the annular structure with adjustable diameter, the diameter when stretching into the eyes of the patient from the incision is smaller, can be smaller than 2.5mm, is smaller than the incision, can easily go deep into the anterior chamber, and reaches about 5mm through adjusting into the annular structure with proper size after going deep, thereby carrying out the operation of cutting the capsule.

The above-mentioned capsulotomy device for cataract surgery has at least the following disadvantages when in use: the fixed end 11 and the free end 12 of the blade 1 have a gap, so that the blade 1 cannot completely cut off the capsular sac during the capsulotomy, and the capsular sac is easy to tear at the gap of the blade, which affects the quality of the operation.

Disclosure of Invention

In view of this, the present invention provides a capsulotomy device for cataract surgery, which mainly solves the technical problems that: how to prevent the anterior capsule from being torn when cutting the membrane and improve the operation quality.

In order to achieve the purpose, the invention mainly provides the following technical scheme:

the embodiment of the invention provides a capsule cutting device for cataract surgery, which comprises a shell, a rotary drum, a push rod and an arc-shaped blade for cutting a front capsule; the push rod is used for being matched with the rotary drum in an inserting mode, and the central lines of the push rod and the rotary drum are overlapped; the number of the arc-shaped blades is more than two, the arc-shaped blades are circularly distributed around the central line, and each arc-shaped blade is connected with the rotary drum through an elastic sheet; the push rod can extend and retract relative to the rotary drum; each elastic sheet is used for being pushed by the push rod to drive the corresponding arc-shaped blade to move in the direction far away from the central line at the same time in an equal amplitude manner; at least one part of the rotary drum is rotatably arranged in the shell, each arc-shaped blade is positioned outside the shell, a first driving piece for driving the rotary drum to rotate is arranged on the shell, and at least one part of the first driving piece is exposed outside the shell; the rotating drum is fixedly sleeved with a first transmission gear, the first driving piece is a first driving gear which is rotatably arranged in the shell, and the first driving gear is meshed with the first transmission gear; the shell is provided with a first limiting structure for limiting the axial movement of the rotary drum; the first limiting structure comprises a first limiting groove arranged in the shell, so that the first transmission gear is axially limited through the first limiting groove; the first transmission gear is used for being in sliding fit with two opposite sides of the first limiting groove.

By means of the technical scheme, the capsulotomy device for cataract surgery has at least the following beneficial effects:

1. the push rod can drive the arc-shaped blades to move in the direction far away from the central line in equal amplitude by pushing the elastic sheet, so that the diameter of the circle formed by the arc-shaped blades around the arc-shaped blades can be adjusted, and the arc-shaped blades can conveniently extend into the eyes of a patient from a small operation incision to perform a cyst cutting operation;

2. the rotary drum is adopted to drive the arc-shaped blades to rotationally cut the front capsular sac, so that a circular front capsular sac can be cut, the defect that the blades with fractures cannot rotate to cause tearing in the prior art is overcome, and the quality of the operation is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a prior art capsulotomy device for cataract surgery;

FIG. 2 is a schematic diagram of an assembled capsule cutting device for cataract surgery according to an embodiment of the present invention;

FIG. 3 is an exploded view of the capsulotomy device of FIG. 2 for cataract surgery;

FIG. 4 is a side view of the capsulotomy device of FIG. 2 for cataract surgery;

fig. 5 is a sectional view taken along line a-a of fig. 4.

Reference numerals: 1. a housing; 2. a spring plate; 3. an arc-shaped blade; 4. a first drive gear; 5. a second drive gear; 6. a limiting cylinder; 7. a rotating drum; 8. a first drive gear; 9. a second transmission gear; 10. a push rod; 11. a first limit groove; 12. a second limit groove; 13. a handle portion; 14. a sleeve; 21. an inclined section; 22. a connecting section; 61. a limiting through groove; a. a centerline.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly. In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

As shown in fig. 2 and 3, the present invention provides a capsulotomy device for cataract surgery, which comprises a rotary drum 7, a push rod 10 and a curved blade 3, wherein the curved blade 3 is used for cutting the anterior capsule. The push rod 10 is used for being matched with the rotary drum 7 in an inserting mode, and the center lines a of the push rod and the rotary drum are overlapped. Preferably, the push rod 10 is a round rod, and the push rod 10 may be solid or hollow. The number of the arc-shaped blades 3 is more than two, and the arc-shaped blades are distributed in a circular shape around the central line a. Preferably, the arc-shaped blades 3 are uniformly distributed in a circular shape. Each arc-shaped blade 3 is connected with the rotary drum 7 through the elastic sheet 2. Each arcuate blade 3 can cut a circular anterior capsule about the centerline a as the drum 7 rotates about the centerline a.

As shown in fig. 2, the push rod 10 is retractable with respect to the drum 7. Each elastic sheet 2 is used for being pushed by the push rod 10 to drive the corresponding arc-shaped blade 3 to move along the direction far away from the central line a at the same time in an equal amplitude manner, so that the diameter of the circle formed by surrounding each arc-shaped blade 3 can be adjusted, each arc-shaped blade 3 can extend into the eye of a patient from a small operation incision (such as 2.5 mm), the diameter of the circle formed by surrounding each arc-shaped blade 3 is adjusted through the push rod 10 after the arc-shaped blades extend deeply, such as about 5mm, then the rotary drum 7 is rotated to perform the capsule cutting operation, and the diameter of the circle formed by surrounding each arc-shaped blade 3 is adjusted to be small through the push rod 10 after the capsule cutting is completed, so that each arc-shaped blade 3.

In the technical scheme provided above, on one hand, the push rod 10 can drive each arc-shaped blade 3 to move with equal amplitude along the direction far away from the central line a by pushing the elastic sheet 2, so that the diameter of the circle formed by each arc-shaped blade 3 in a surrounding manner can be adjusted, and each arc-shaped blade 3 can conveniently extend into the eye of a patient from a small operation incision to perform a capsulotomy operation; on the other hand, the rotary drum 7 is adopted to drive the arc-shaped blades 3 to rotationally cut the front capsular sac, so that a circular front capsular sac can be cut, the defect that the blades with fractures cannot rotate to cause tearing in the prior art is avoided, and the quality of the operation is improved.

In order to achieve the effect that each elastic sheet 2 is pushed by the push rod 10 to drive the corresponding arc-shaped blade 3 to move along the direction away from the center line a at the same time in equal amplitude, the push rod 10 can directly push each elastic sheet 2 to move or indirectly push each elastic sheet 2 to move, and the following description will take the example that the push rod 10 directly pushes each elastic sheet 2 to move.

As shown in fig. 4, each of the elastic pieces 2 has an inclined section 21, and one end of each inclined section 21 away from the drum 7 is closer to the center line a than the other end. Each inclined section 21 is located on the movement locus of the push rod 10. The inclined sections 21 cooperate to form a cone-like shape, and the end of each inclined section 21 remote from the drum 7 forms a small mouth end of the cone. Wherein each spring plate 2 is used to be pushed by the push rod 10 through the corresponding inclined section 21. Specifically, when the push rod 10 extends axially along the rotary drum 7, the push rod 10 abuts against the inclined section 21 of each elastic sheet 2 and pushes each elastic sheet 2, so that each elastic sheet 2 drives the arc-shaped blade 3 to expand outwards along the direction away from the central line a; when the push rod 10 retracts, each elastic sheet 2 rebounds to drive each arc-shaped blade 3 to retract inwards along the direction close to the central line a.

In order to facilitate connection between the inclined section 21 of each spring plate 2 and the corresponding arc-shaped blade 3, as shown in fig. 4, each spring plate 2 further includes a connecting section 22, one end of the connecting section 22 is connected to one end of the inclined section 21, which is far away from the rotating drum 7, and the other end of the connecting section 22 is used for being connected to the inner arc surface of the arc-shaped blade 3. The connecting section 22 is disposed at an angle to the inclined section 21, preferably at an acute angle.

In order to improve the precision of the movement of each spring plate 2 pushed by the push rod 10, as shown in fig. 3 and 4, the capsulotomy device for cataract surgery of the invention can further comprise a limiting cylinder 6, and each limiting cylinder 6 is circumferentially fixed on the rotary cylinder 7 so as to be driven by the rotary cylinder 7 to rotate together. Preferably, the limiting cylinder 6 is detachable relative to the rotating cylinder 7, such as clamping the limiting cylinder and the rotating cylinder. The lateral wall of one end of the limiting cylinder 6 is provided with more than two limiting through grooves 61 so as to limit and guide the movement of each elastic sheet 2 through the limiting through grooves 61. Preferably, each elastic sheet 2 is used for passing through the limiting through groove 61 in a one-to-one correspondence manner and is in sliding fit with the limiting through groove 61.

As shown in fig. 5, when each of the elastic sheets 2 includes the connecting section 22, each of the elastic sheets 2 is used for passing through the corresponding connecting section 22 through the limiting through groove 61 in a one-to-one correspondence manner and is in sliding fit with the limiting through groove 61, so that the elastic sheets 2 are conveniently assembled in the limiting through groove 61.

In order to improve the connection stability, the elastic sheet 2 and the rotating cylinder 7 may be integrally formed, such as integrally injection-molded.

The blade can be fixed on the elastic sheet 2 by gluing, or the elastic sheet 2 can be fixed on the blade by hot melting. Of course, both the elastic sheet 2 and the blade may be made of metal material, so that the two can be fixed by welding.

To facilitate rotation of the drum 7, as shown in fig. 2, the present capsulotomy device for cataract surgery may further comprise a housing 1, at least a portion of the drum 7 being rotatably disposed in the housing 1. In a specific application example, a part of the drum 7 is located inside the housing 1, and another part extends out of the housing 1. The aforementioned curved blades 3 are located outside the housing 1 to facilitate the operation. The housing 1 is provided with a first driving member for driving the rotating drum 7 to rotate, and at least a part of the first driving member is exposed outside the housing 1, so that medical personnel can manually operate the first driving member to rotate the rotating drum 7.

In a specific application example, as shown in fig. 2, the aforementioned first driving member is a first driving gear 4, and the first driving gear 4 is rotatably disposed in the housing 1, and only a part of the gear teeth is exposed outside the housing 1, so as to facilitate the medical staff to operate the first driving gear 4 through the gear teeth. As shown in fig. 5, a first transmission gear 8 is fixedly sleeved on the rotary drum 7, and the first transmission gear 8 can be fastened to the rotary drum 7 by a key. The first transmission gear 8 is meshed with the first drive gear 4. When medical personnel promote first drive gear 4 and rotate, first drive gear 4 drives rotary drum 7 through first drive gear 8 and rotates to reach first driving piece drive rotary drum 7 pivoted effect.

In order to prevent the rotating drum 7 from moving axially relative to the housing 1 and affecting the operation, it is preferable that the housing 1 is provided with a first limit structure for limiting the axial movement of the rotating drum 7. In a specific application example, as shown in fig. 5, the first limit structure may include a first limit groove 11 disposed in the housing 1 to axially limit the first transmission gear 8 through the first limit groove 11. Wherein, the first transmission gear 8 is used for sliding fit with two opposite sides of the first limit groove 11. Preferably, the first limiting groove 11 is an annular groove, and the first transmission gear 8 is integrally located in the annular groove. For ease of installation, it is preferred that the housing 1 is of two-half construction and that the annular groove is in two halves, one on each half, as shown in figure 3.

In order to facilitate the push rod 10 to extend and retract relative to the rotary drum 7, as shown in fig. 2, a second driving member is further disposed on the housing 1, the second driving member is used for driving the push rod 10 to extend and retract relative to the rotary drum 7, and at least a portion of the second driving member is exposed outside the housing 1, so that the medical staff can manually operate the second driving member to extend and retract the push rod 10 relative to the rotary drum 7. In a specific application example, as shown in fig. 5, the aforementioned second driving member may be a second driving gear 5, and the second driving gear 5 is rotatably disposed in the housing 1, and only a part of the gear teeth is exposed outside the housing 1, so as to facilitate the medical staff to operate the second driving gear 5 through the gear teeth. Wherein, the push rod 10 can be threaded on the sleeve 14, and the shell 1 is provided with a second limit structure for limiting the axial movement of the sleeve 14. The sleeve 14 is fixedly sleeved with the second transmission gear 9, for example, the second transmission gear 9 can be connected with the sleeve 14 through a key. The second transmission gear 9 is engaged with the second drive gear 5. When the medical staff pushes the second driving gear 5 to rotate, the second driving gear 5 drives the sleeve 14 to rotate through the second transmission gear 9, so that the sleeve 14 drives the push rod 10 to extend and retract relative to the rotary drum 7.

In a specific application example, as shown in fig. 5, the aforementioned second limiting structure may include a second limiting groove 12 disposed in the housing 1, and the second limiting structure limits the second transmission gear 9 through the second limiting groove 12. Since the second transmission gear 9 is fixed to the sleeve 14, the second transmission gear 9 is axially limited, i.e. indirectly limited to the sleeve 14. Wherein, the second transmission gear 9 is used for sliding fit with two opposite sides of the second limit groove 12. Preferably, the second limiting groove 12 is an annular groove, and the second transmission gear 9 is integrally located in the annular groove. For ease of installation, it is preferred that the housing 1 is of two-half construction and that the annular groove is in two halves, one on each half, as shown in figure 3.

As shown in fig. 5, the first driving gear 4 and the second driving gear 5 may be coaxially disposed to save an installation space of the rotation shaft.

As shown in FIG. 5, the push rod 10 can be slidably engaged with the inner hole of the drum 7, and the inner hole of the drum 7 can limit and guide the movement of the push rod 10, so as to improve the extension and retraction accuracy of the push rod 10.

As shown in fig. 5, the aforementioned housing 1 may have a handle portion 13 to facilitate a medical staff to perform a cataract surgery on an eye of a patient by holding the capsulotomy device for cataract surgery of the present invention.

The invention discloses a capsule cutting device for cataract surgery, which has the following working principle:

the medical staff holds the handle 13 on the shell 1 and then rotates the second driving gear 5 to retract each arc-shaped blade 3, so that each arc-shaped blade 3 can extend into a smaller operation incision (such as an incision with the size of 2.5 mm); then, the second driving gear 5 is rotated to enable each arc-shaped blade 3 to expand outwards so as to cut a larger-diameter anterior capsule (for example, the anterior capsule with the diameter of 5 mm); after the positions of the arc-shaped blades 3 are adjusted, the first driving gear 4 is rotated, so that each arc-shaped blade 3 rotates to cut the anterior capsule of the patient; after the front capsular sac is cut, the second driving gear 5 is rotated to contract the arc-shaped blades 3 inwards so as to be taken out of the small surgical incision.

Here, it should be noted that: in the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The capsulotomy device for cataract surgery is characterized by comprising a shell (1), a rotary drum (7), a push rod (10) and an arc-shaped blade (3) for cutting a front capsular sac;

the push rod (10) is used for being in plug fit with the rotary drum (7), and the central lines (a) of the push rod and the rotary drum are overlapped;

the number of the arc-shaped blades (3) is more than two, the arc-shaped blades are circularly distributed around the central line (a), and each arc-shaped blade (3) is connected with the rotary drum (7) through an elastic sheet (2);

the push rod (10) can extend and retract relative to the rotary drum (7); each elastic sheet (2) is pushed by the push rod (10) to drive the corresponding arc-shaped blade (3) to move in the direction far away from the central line (a) at the same time in an equal amplitude manner;

wherein at least one part of the rotary drum (7) is rotatably arranged in the housing (1), each arc-shaped blade (3) is positioned outside the housing (1), a first driving part for driving the rotary drum (7) to rotate is arranged on the housing (1), and at least one part of the first driving part is exposed outside the housing (1);

a first transmission gear (8) is fixedly sleeved on the rotary drum (7), the first driving piece is a first driving gear (4) which is rotatably arranged in the shell (1), and the first driving gear (4) is meshed with the first transmission gear (8);

the shell (1) is provided with a first limiting structure for limiting the axial movement of the rotary drum (7); the first limiting structure comprises a first limiting groove (11) arranged in the shell (1) so as to axially limit the first transmission gear (8) through the first limiting groove (11); the first transmission gear (8) is used for being in sliding fit with two opposite sides of the first limiting groove (11).