Iris stitching instrument

Abstract

The utility model discloses an iris stitching instrument, relates to the field of medical instruments, and aims to stably push a stitching needle and guide the stitching needle to a puncture part of the stitching needle along an arc line so as to reduce the operation difficulty and the labor intensity of stitching. The iris stitching instrument comprises a handle, a driving module and a stitching assembly. Through the guide cylinder with the arc cylinder section, the puncture part of the suture needle can be gradually released to be in an original state along an arc path, so that the suture accuracy is improved, the suture operation difficulty is reduced, and damage to eyeball tissue is reduced; the sewing needle can be controlled to conduct sewing by rotating a knob of the driving module, meanwhile, a gear and rack mechanism composed of a gear and a rack structure drives the needle base to do linear motion, the sewing needle can be stably pushed, the pushing position of the sewing needle can be accurately controlled, high stability and reliability are achieved, and the sewing needle can be conveniently and rapidly pushed. The suture operation in the operation can be standardized, the labor intensity of doctors is reduced, and the suture accuracy and the postoperative effect are improved.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and particularly relates to an iris suture device. Background Art

[0002] In the natural state, pupil dilation is common in trauma, sequelae of acute glaucoma attacks, etc. Patients will have obvious symptoms such as photophobia and vision loss, which seriously affect the quality of life of patients. Therefore, patients with pupil dilation have a strong desire for treatment and hope to improve their vision and relieve the symptoms of photophobia. Currently, the main treatment method is to suture to make the pupil smaller.

[0003] Iris suture is one of the routine ophthalmic surgeries in clinical practice. Currently, an intraocular lens positioning hook is often used to lift the iris tissue to be sutured, and then a suture needle with a suture is passed through the iris tissue or the iris and its surrounding ocular tissues to suture the iris and make the pupil contract.

[0004] Currently, most doctors directly operate the iris suture needle for suturing during iris suture. Since the existing iris suture needles are usually straight needles, while the iris and the eyeball have a curvature, and the contour of the pupil is approximately circular, the iris suture needle needs to be inserted obliquely into the ocular tissue before suturing, which is not convenient for operation; also, since the suture position is below the doctor's field of vision, when the straight needle is inserted obliquely for suturing, it is difficult to determine the suture position; moreover, during the process of determining the suture position, when the needle tip at the front end of the iris suture needle adjusts its position in the limited operation space of the eyeball, it is easy to damage the iris and its surrounding ocular tissues. In addition, due to the limited suture space in the eye, and the iris suture needle cannot well fit the circular contour of the pupil, and the iris suture needle is pushed by the doctor's arm towards the suture position to achieve suturing, there is no auxiliary instrument to guide and stably push the iris suture needle during the operation, and it is entirely based on experience, so the operation difficulty is high, and the operation level and experience requirements for doctors are relatively high. Otherwise, it is easy to cause uneven suturing, and the pupil shapes after suturing are various, mostly irregular shapes, such as angular or drop-shaped, and even multiple pupil phenomena may occur. Even for doctors with rich practical experience, directly operating the iris suture needle for suturing has a high labor intensity, and it is difficult to keep both hands stable after a long time of surgical operation. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an iris suture device, which can smoothly push the suture needle and guide its puncture part along an arc to reduce the operation difficulty and labor intensity of suturing.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an iris suture device, comprising a handle, a driving module, and a suture component;

[0007] The handle has a handle cavity;

[0008] The driving module includes a needle seat, a gear and a knob; the needle seat is movably arranged in the handle cavity, and a rack structure distributed along the axial direction of the handle is arranged on the needle seat; the gear is rotatably arranged in the handle cavity through a rotating shaft assembly and meshes with the rack structure; the knob is rotatably arranged on the outer wall of the handle and is in transmission connection with the gear; when the knob drives the gear to rotate, the gear can drive the needle seat to move along the distribution direction of the rack structure;

[0009] The suture assembly includes a guide tube and a suture needle; the guide tube includes a straight tube section arranged at the front end of the handle along the axial direction of the handle and an arc tube section connected to the front end of the straight tube section; the suture needle is made of shape memory alloy and has a puncture part in an arc shape; the suture needle is arranged through the guide tube, and the rear end thereof penetrates into the handle cavity and is connected to the needle seat;

[0010] The suture needle has a constrained state and a released state; when in the constrained state, at least part of the puncture part of the suture needle is inside the arc tube section; during the process of switching from the constrained state to the released state, the suture needle is pushed forward by the needle seat, and its puncture part moves out of the guide tube along an arc path and is gradually released to its original state.

[0011] Further, the handle includes a first housing, a second housing and a guide tube seat;

[0012] The first housing and the second housing are detachably connected, and the front ends of the two are closed to form a handle head connection part;

[0013] The guide tube seat is arranged on the handle head connection part;

[0014] The handle cavity is formed by enclosing of the first housing, the second housing and the guide tube seat;

[0015] The straight tube section of the guide tube is arranged on the guide tube seat.

[0016] Further, the rotating shaft assembly includes a first bearing, a second bearing and a gear shaft;

[0017] The first bearing is arranged on the first housing;

[0018] The second bearing is arranged on the second housing;

[0019] Both ends of the gear shaft are respectively connected to the inner rings of the first bearing and the second bearing;

[0020] The gear is arranged on the gear shaft.

[0021] Further, the knob has a connecting column, and the connecting column is in transmission connection with the gear shaft;

[0022] A damping member is provided between the connecting column and / or the gear shaft and the housing of the handle.

[0023] Furthermore, a knob platform is provided at the middle part of the outer wall of the handle;

[0024] The knob is rotatably arranged on the knob platform.

[0025] Furthermore, the knob includes a circular knob body, and anti-slip textures are provided on the circumferential side surface of the knob body.

[0026] Furthermore, a needle connecting groove is provided at the front end of the needle holder, locking needle holes are provided on the groove wall of the needle connecting groove, and a locking needle member is threadedly connected in the locking needle holes;

[0027] The rear end of the suture needle is inserted into the needle connecting groove and is pressed by the locking needle member.

[0028] Furthermore, a limiting structure for limiting the moving stroke of the needle holder is provided in the handle cavity;

[0029] The limiting structure includes a limiting groove and a limiting post at least partially extending into the limiting groove;

[0030] The limiting groove is axially provided on the needle holder along the handle, and the limiting post is provided on the cavity wall of the handle cavity;

[0031] Or, the limiting groove is axially provided on the cavity wall of the handle cavity along the handle, and the limiting post is provided on the needle holder.

[0032] Furthermore, the suture needle includes a needle tip, a transition section and a needle rod section connected in sequence;

[0033] A threading hole is provided on the needle tip;

[0034] The needle tip and the transition section together form the puncturing part of the suture needle, and the radian of the puncturing part is α, 3 / 2π < α < 2π.

[0035] Furthermore, the needle tip includes a needle edge, the needle edge is in the shape of a triangular pyramid, the edges where the three side surfaces meet form a cutting edge, and the vertex where the three side surfaces meet together forms a needle tip.

[0036] The beneficial effects of the present utility model are as follows: Through the guide tube with an arc-shaped barrel section, on the one hand, it can guide the suture needle, ensuring that the puncture part of the suture needle can be gradually released to its original state along the arc-shaped path to puncture into the iris tissue or the eye tissue of the iris and its periphery, and better fit the circular contour of the pupil, thereby improving the accuracy of suturing, reducing the operation difficulty of suturing, and reducing the damage to the eye tissue. On the other hand, the arc-shaped puncture part moves along the arc-shaped path and can stick to the patient's eyeball and pierce into the iris tissue without significant tilting, which is conducive to quickly determining the suture position and simplifying the suture operation process; By rotating the knob of the rotation drive module, the suture needle can be controlled for suturing. At the same time, the needle holder is driven to perform a linear motion through the gear and rack mechanism composed of a gear and a rack structure, which can smoothly push the suture needle. This not only facilitates accurately controlling the pushing position of the suture needle, but also has high stability and reliability, which is conducive to standardizing the intraoperative suture operation, reducing the labor intensity of the doctor, and further improving the accuracy of suturing and the postoperative effect.

[0037] The technical effects brought by or directly generated by other technical features of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the three-dimensional structure schematic diagram of the present utility model;

[0039] Figure 2 is the three-dimensional exploded view of the present utility model;

[0040] Figure 3 is the top view structure schematic diagram of the present utility model when the suture needle is in the constrained state;

[0041] Figure 4 is the top view structure schematic diagram of the present utility model when the suture needle is in the released state;

[0042] Figure 5 is along Figure 4 the cross-sectional view taken along line A-A in

[0043] Figure 6 is the three-dimensional structure schematic diagram of the suture needle in the present utility model;

[0044] Figure 7 is Figure 6 the partial enlarged view at B in

[0045] Figure 8 is the demonstration diagram of the puncture process of suturing the iris using the present utility model;

[0046] The markings in the figure are: 100 - handle, 101 - handle cavity, 102 - handle head connection part, 103 - knob platform, 104 - limit post, 110 - first housing, 120 - second housing, 121 - mesh rib, 130 - guide cylinder seat, 210 - needle seat, 211 - needle connecting groove, 212 - needle locking hole, 213 - rack structure, 214 - limit groove, 220 - gear, 230 - knob, 231 - knob body, 232 - anti-slip texture, 233 - connecting post, 240 - rotating shaft assembly, 241 - first bearing, 242 - second bearing, 243 - gear shaft, 300 - suture assembly, 310 - guide cylinder, 311 - straight cylinder section, 312 - arc cylinder section, 320 - suture needle, 321 - needle tip, 3211 - thread passing hole, 3212 - cutting edge, 3213 - needle point, 322 - transition section, 323 - needle bar section, 400 - pupil, 500 - suture thread. Detailed implementation mode

[0047] The following further explains the present utility model with reference to the accompanying drawings. The same reference numerals in the drawings denote components with the same or similar functions. Although various aspects of the implementation mode are shown in the drawings, unless otherwise specified, the drawings do not have to be drawn to scale.

[0048] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or position and dimensional relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of description and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0049] In the description of the present utility model, the terms "connection", "combination", "coupling", and "installation" can be direct connection, combination, coupling, or installation, or can be indirect connection, combination, coupling, or installation. For example: direct connection means that two parts or components are connected together without the need for an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. Among them, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can also include electrical connection or coupling. The term "rotatably arranged or connected" refers to the connection method between two parts, such that one part can rotate relative to the other part; this connection method is usually achieved using mechanical components such as a rotating shaft, bearing, bushing, and shaft hole fit. When the term "multiple" represents a quantity, it usually means a quantity of three or more. For example: "multiple" usually means three or more. The term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example: A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone these three situations. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] Combination Figures 1 to 5 As shown, the iris suture device includes a handle 100, a driving module, and a suture assembly 300;

[0051] The handle 100 is a component for a doctor to hold and operate the iris suture device; the handle 100 has a handle cavity 101, and the handle cavity 101 is mainly used for installing and protecting the driving module;

[0052] The driving module is the driving component of the iris suture device, mainly used to drive the suture needle 320 to move along the guide tube 310 for suturing; the driving module includes a needle holder 210, a gear 220, and a knob 230; the needle holder 210 is used for installing and connecting the suture needle 320, the needle holder 210 is movably arranged in the handle cavity 101, a rack structure 213 distributed along the axial direction of the handle 100 is arranged on the needle holder 210, and the rack structure 213 is composed of multiple teeth; the gear 220 is rotatably arranged in the handle cavity 101 through a rotating shaft assembly 240 and meshes with the rack structure 213; the knob 230 is rotatably arranged on the outer wall of the handle 100 and is in transmission connection with the gear 220; when the knob 230 drives the gear 220 to rotate, the gear 220 can drive the needle holder 210 to move along the distribution direction of the rack structure 213, that is, drive the needle holder 210 to move back and forth along the axial direction of the handle 100, so as to smoothly and accurately push the suture needle 320 installed on the needle holder 210; there can be various ways for the knob 230 to be in transmission connection with the gear 220, such as: gear transmission connection, coupling connection, coaxial connection, etc.;

[0053] The suture assembly 300 includes a guide tube 310 and a suture needle 320; the guide tube 310 includes a straight tube section 311 axially arranged at the front end of the handle 100 along the axis of the handle 100, and an arc tube section 312 connected to the front end of the straight tube section 311; the suture needle 320 is made of shape memory alloy and has a puncture part in an arc shape; the suture needle 320 is arranged through the guide tube 310, and its rear end penetrates into the handle cavity 101 and is connected to the needle holder 210; on the one hand, the guide tube 310 can guide the suture needle 320 to ensure that the puncture part of the suture needle 320 can be gradually released into its original state along an arc path to puncture into the iris tissue or the eyeball tissue of the iris and its periphery, and better fit the circular contour of the pupil 400, thereby improving the accuracy of suture, reducing the operation difficulty of suture, and reducing the damage to the eyeball tissue. On the other hand, the arc-shaped puncture part moves along the arc path and can stick to the patient's eyeball and pierce into the iris tissue without significant tilting, which is beneficial to quickly determine the suture position and simplify the suture operation process; the shape memory alloy has a much larger deformation recovery ability than ordinary metals. It will produce an adaptive deformation under constrained conditions and can directly or indirectly return to its original state after losing the constraint; indirectly returning to its original state means that the shape memory alloy returns to its original state under the assistance of external actions (such as thermal load, guiding channel, etc.); there can be various shape memory alloys, preferably nickel-titanium shape memory alloy. The nickel-titanium shape memory alloy has good shape memory characteristics, superelasticity, corrosion resistance, and temperature sensitivity, and is particularly suitable for making the main body of the suture needle; considering that the normal body temperature of the human body is 36.3 - 37.2 °C, therefore, the suture needle 320 is further preferably a needle made of nickel-titanium shape memory alloy with a memory temperature of 36.5 - 37 °C. When the puncture part of the suture needle 320 pierces into the iris tissue or the eyeball tissue of the iris and its periphery, it will be affected by the thermal load generated by the patient's body temperature, and then the puncture part of the suture needle 320 will gradually heat up to the memory temperature, thereby automatically returning to an arc shape without applying additional thermal load, which is very convenient to use;

[0054] The suture needle 320 has a constrained state and a released state; when in the constrained state, at least part of the puncture part of the suture needle 320 is within the arc tube section 312; during the process of switching from the constrained state to the released state, the suture needle 320 is pushed forward by the needle holder 210, and its puncture part moves out of the guide tube 310 along the arc path and is gradually released into its original state; that is, during this process, the puncture part moves along an arc trajectory and gradually returns to an arc shape, as Figure 8 shown; in this way, it can better fit the circular contour of the pupil 400, and a more stable and safer puncture operation can be achieved.

[0055] Using this iris suture device to suture the iris, after the physician determines the suture position, hold the handle 100 so that the guide tube 310 corresponds to the suture position and maintains a certain puncture distance. Then, rotate the knob 230 to push the suture needle 320, so that the puncture part of the suture needle 320 punctures into the iris tissue or the eyeball tissue of the iris and its periphery, and stitches along an arc path to narrow the pupil 400. It can not only better adapt to the circular contour of the pupil 400, which is beneficial to suturing the iris so that the pupil 400 shrinks to obtain a more circular pupil shape, but also does not need to tilt the suture needle 320 significantly, and basically does not need to adjust the position of the needle tip 321 in the limited operation space of the eyeball, which can reduce the damage to the eyeball tissue. Other components of this iris suture device except the suture assembly 300 can be made by 3D printing, which is beneficial for personalized customization according to the physician's habits and reduces costs. Its needle holder 210 and gear 220 are preferably made by ceramic 3D printing, which has high precision, high wear resistance and long service life.

[0056] Combined with Figure 1 、 Figure 2 and Figure 5 As shown, in some embodiments of the present invention, the handle 100 includes a first housing 110, a second housing 120 and a guide tube seat 130; the first housing 110 and the second housing 120 are detachably connected, and the front ends of the two are closed to form a handle head connection part 102; the guide tube seat 130 is arranged on the handle head connection part 102; the handle cavity 101 is surrounded by the first housing 110, the second housing 120 and the guide tube seat 130; the straight tube section 311 of the guide tube 310 is arranged on the guide tube seat 130. This handle 100 has the advantages of simple structure, convenient manufacturing and good integrity. The first housing 110 and the second housing 120 are generally detachably connected through a buckle structure; the guide tube seat 130 is generally sleeved on the handle head connection part 102 and is threadedly connected thereto. It can not only be used to install and fix the guide tube 310, but also fix the first housing 110 and the second housing 120 together, reducing the use of connecting parts.

[0057] Another example is Figure 2 As shown, in some embodiments of the present invention, a strengthening structure is arranged on the inner wall of the first housing 110 and / or the second housing 120. The strengthening structure can be various, for example: reinforcing ribs, mesh ribs 121, etc. The strengthening structure can not only improve the structural strength and stiffness of the handle 100, reduce the risk of its deformation and damage, but also support the components installed in the handle cavity 101 to avoid shaking and abnormal noise during use.

[0058] The rotating shaft assembly 240 can be various. Combined with Figure 2 and Figure 5As shown, in some embodiments of the present invention, the shaft assembly 240 includes a first bearing 241, a second bearing 242, and a gear shaft 243. The first bearing 241 is disposed on the first housing 110; the second bearing 242 is disposed on the second housing 120; the ends of the gear shaft 243 are connected to the inner ring of the first bearing 241 and the inner ring of the second bearing 242, respectively; and the gear 220 is disposed on the gear shaft 243. The support and fixation of the gear shaft 243 by the first bearing 241 and the second bearing 242 not only ensures stable rotation, but also reduces wear and extends its service life.

[0059] For example Figure 5 As shown, in some embodiments of the present invention, the knob 230 has a connecting column 233, which is transmission-connected to the gear shaft 243; a damping member is provided between the connecting column 233 and / or the gear shaft 243 and the housing of the handle 100. In this way, on the one hand, when the knob 230 is rotated, the speed of driving the gear 220 to rotate and the speed of the needle seat 210 to perform linear motion can be slowed down, making the extension and retraction process of the suture needle 320 smoother and more precise. On the other hand, the physician can feel a certain resistance when operating the suture needle 320, thereby better controlling the strength and rhythm of the suture, which is conducive to improving the efficiency and accuracy of the operation. Among them, the damping member can be of various types, such as: rubber pads, O-rings, etc. In order to simplify the structure and provide a transmission effect, it is preferred to coaxially connect the connecting column 233 and the gear shaft 243.

[0060] Recombination Figures 1 to 5 As shown, in some embodiments of the present invention, a knob platform 103 is provided in the middle of the outer wall of the handle 100, and the knob 230 is rotatably disposed on the knob platform 103. This not only facilitates the installation of the knob 230, but also facilitates the physician to use the thumb to rotate the knob 230 when holding the handle 100, so as to facilitate one-handed operation and achieve the pushing of the suture needle 320.

[0061] Recombination Figures 1 to 5 As shown, in some embodiments of the present invention, the knob 230 includes a circular knob body 231, with an anti-slip texture 232 provided on the circumferential surface of the knob body 231. This not only facilitates the physician's operation of the knob 230, but also provides a non-slip effect and enhances the physician's feel when operating the knob 230. The anti-slip texture 232 can be of various types, such as a toothed structure, a mesh structure, a corrugated structure, and the like.

[0062] For example Figure 5As shown, in some embodiments of the present utility model, a needle connecting groove 211 is formed at the front end of the needle holder 210, and a needle locking hole 212 is formed on the groove wall of the needle connecting groove 211. A needle locking member is threadedly connected in the needle locking hole 212; the rear end of the suture needle 320 is inserted into the needle connecting groove 211 and is pressed by the needle locking member. By pressing and fixing the suture needle 320 with the needle locking member, on the one hand, it can ensure that the suture needle 320 will not loosen or fall off during use, and on the other hand, when it is necessary to replace the suture needle 320, only need to loosen the needle locking member to remove the old suture needle 320, and after inserting the new suture needle 320, tighten the needle locking member, which is very convenient.

[0063] In some embodiments of the present utility model, a limiting structure for restricting the moving stroke of the needle holder 210 is provided in the handle cavity 101 to improve the precision of the operation. The limiting structure can be various, for example: a stop block, a stop pin, a shoulder structure, etc.

[0064] Combined with Figure 2 and Figure 5 As shown, in some embodiments of the present utility model, the limiting structure includes a limiting groove 214 and a limiting post 104 at least partially extending into the limiting groove 214;

[0065] The limiting groove 214 is axially formed on the needle holder 210 along the handle 100, and the limiting post 104 is arranged on the cavity wall of the handle cavity 101;

[0066] Alternatively, the limiting groove 214 is axially formed on the cavity wall of the handle cavity 101 along the handle 100, and the limiting post 104 is arranged on the needle holder 210.

[0067] The above-mentioned limiting structure has the advantages of simple structure and good limiting effect. The limiting groove 214 determines the stroke of the needle holder 210, which is generally determined according to the length that the suture needle 320 needs to be pushed out; the limiting groove 214 can be various, preferably an oblong hole, and at this time the limiting post 104 is preferably a circular column adapted to the oblong hole.

[0068] Combined with Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments of the present utility model, the guide tube 310 is coaxially arranged with the handle 100 to facilitate guiding the suture needle 320 and improve the stability of pushing. The guide tube 310 can be made of various materials, preferably made of stainless steel.

[0069] Such as Figure 6As shown, in some embodiments of the present utility model, the suture needle 320 includes a needle tip 321, a transition section 322, and a needle shank section 323 connected in sequence; a thread-passing hole 3211 is formed in the needle tip 321 for threading a suture 500; the needle tip 321 and the transition section 322 together form the puncture portion of the suture needle 320, and the radian of the puncture portion is α, where 3 / 2π < α < 2π. The puncture portion of the suture needle 320 is a circular arc structure with a radian greater than 3 / 4 of a circle, which can better fit the circular contour of the pupil 400, more accurately guide the suture 500 for suturing, further facilitate suturing the iris to make the pupil 400 contract to obtain a more circular pupil shape, and effectively reduce the damage to the eye tissue during the puncture process.

[0070] Combined with Figures 1 to 8 As shown, the specific process of using the above suture needle 320 for suturing by this iris suturing device is as follows: Operate the knob 230 to make the needle holder 210 push the suture needle 320 forward for a certain distance so that the needle tip 3213 pierces into the iris → Use an intraocular lens positioning hook to lift the iris → Operate the knob 230 to make the needle holder 210 continue to push the suture needle 320 forward for a certain distance so that the puncture portion carries the suture 500 through the lower part of the iris → Lower the iris → Push the suture needle 320 forward for another certain distance so that the puncture portion carries the suture 500 through the upper part of the iris → Repeat the operation so that the suture 500 shuttles above and below the iris tissue or the eye tissue around the iris and its periphery → Pull the suture 500 to form an arc suture path around the pupil 400 on the iris tissue or the eye tissue around the iris and its periphery → Tighten the suture 500 to reduce the diameter of the pupil 400 and obtain a more circular pupil shape → The iris suture is completed.

[0071] Combined with Figure 6 and Figure 7 As shown, in some embodiments of the present utility model, the needle tip 321 includes a needle edge, the needle edge is in the shape of a triangular pyramid, the edges where its three side surfaces meet form a cutting edge 3212, and the vertex where its three side surfaces meet together forms a needle tip 3213. The triangular pyramid-shaped needle edge is sharp, with less friction with the eye tissue, which can reduce the puncture resistance, so as to smoothly and accurately puncture into the iris tissue or the eye tissue around the iris and its periphery, ensure the accurate position of the suture 500, and reduce the trauma to the eye tissue.

[0072] Again, Figure 7 As shown, in some embodiments of the present utility model, the thread-passing hole 3211 is a circular hole, and the intersection of it and the surface of the needle tip 321 is smoothly transitioned through an arc structure. In this way, the intersection of the thread-passing hole 3211 and the surface of the needle tip 321 can be smooth, with less friction with the iris tissue or the eye tissue around the iris and its periphery, further facilitating puncture and reducing the trauma to the eye tissue; moreover, the arc structure can strengthen the strength of the needle tip 321 and improve its service life.

[0073] In some embodiments of the present utility model, the diameter of the suture needle 320 is 0.2 - 0.4 mm, and the length of the suture needle 320 is 50 - 60 mm. The suture needle 320 of this size can reduce tissue damage while ensuring that the iris tissue or the eyeball tissue around the iris and its periphery can be sutured, achieving more precise suturing.

[0074] In some embodiments of the present utility model, the arc radius of the puncture portion of the suture needle 320 is generally 5 - 8 mm, which is beneficial for suturing the iris to effectively contract the pupil 400.

[0075] This document only presents descriptions of various embodiments of the present utility model for illustrative purposes, and is not intended to exhaustively present or be limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Compared with the technologies found in the market, the terms used in this document are selected to best explain the principles of the embodiments, practical applications, or technological advancements, or to enable other technicians in the art to understand the embodiments disclosed herein.

[0076] In this document, various embodiments of the present utility model can be presented in range form. It should be understood that the description in range form is only for convenience and brevity, and should not be construed as a rigid limitation on the scope of the present utility model. Therefore, the description of a range should be considered to specifically disclose all possible sub - ranges and individual values within that range. For example, the description of a range such as from 1 to 6 should be considered to specifically disclose sub - ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and the individual values within that range, such as 1, 2, 3, 4, 5, 6, regardless of the width of the range.

[0077] It should be understood that, for clarity, certain features of the present utility model described in the context of separate embodiments can also be provided in combination in a single embodiment. Conversely, for brevity, the various features of the present utility model described in the context of a single embodiment can also be provided separately, or in any suitable sub - combination, or in any other described embodiment of the present utility model as appropriate. Certain features described in the context of various embodiments are not considered essential features of those embodiments unless the embodiments do not work without those features.

Claims

1. Iris suture instrument, characterized in that: It includes a handle (100), a driving module, and a suture assembly (300); The handle (100) has a handle cavity (101); The driving module includes a needle holder (210), a gear (220), and a knob (230); the needle holder (210) is movably arranged in the handle cavity (101), and a rack structure (213) distributed along the axial direction of the handle (100) is arranged on the needle holder (210); the gear (220) is rotatably arranged in the handle cavity (101) through a rotating shaft assembly (240) and meshes with the rack structure (213); the knob (230) is rotatably arranged on the outer wall of the handle (100) and is in transmission connection with the gear (220); when the knob (230) drives the gear (220) to rotate, the gear (220) can drive the needle holder (210) to move along the distribution direction of the rack structure (213); The suture assembly (300) includes a guide tube (310) and a suture needle (320); the guide tube (310) includes a straight tube section (311) arranged at the front end of the handle (100) along the axial direction of the handle (100), and an arc tube section (312) connected to the front end of the straight tube section (311); the suture needle (320) is made of shape memory alloy and has a puncture part in an arc shape; the suture needle (320) is arranged through the guide tube (310), and its rear end penetrates into the handle cavity (101) and is connected to the needle holder (210); The suture needle (320) has a constrained state and a released state; when in the constrained state, at least part of the puncture part of the suture needle (320) is inside the arc tube section (312); during the process of switching from the constrained state to the released state, the suture needle (320) is pushed forward by the needle holder (210), and its puncture part moves out of the guide tube (310) along an arc path and is gradually released to its original state.

2. The iris suturing device according to claim 1, wherein: The handle (100) includes a first housing (110), a second housing (120), and a guide tube seat (130); The first housing (110) and the second housing (120) are detachably connected, and the front ends of the two are closed to form a handle head connection part (102); The guide tube seat (130) is arranged on the handle head connection part (102); The handle cavity (101) is surrounded by the first housing (110), the second housing (120), and the guide tube seat (130); The straight tube section (311) of the guide tube (310) is arranged on the guide tube seat (130).

3. The iris suturing device according to claim 2, wherein: The rotating shaft assembly (240) includes a first bearing (241), a second bearing (242), and a gear shaft (243); The first bearing (241) is arranged on the first housing (110); The second bearing (242) is arranged on the second housing (120); Both ends of the gear shaft (243) are respectively connected to the inner rings of the first bearing (241) and the second bearing (242); The gear (220) is arranged on the gear shaft (243).

4. The iris suturing device according to claim 3, wherein: The knob (230) has a connecting column (233), and the connecting column (233) is in transmission connection with the gear shaft (243); A damping member is provided between the connecting column (233) and / or the gear shaft (243) and the housing of the handle (100).

5. The iris suture apparatus according to claim 1, wherein: A knob platform (103) is provided at the middle of the outer wall of the handle (100); The knob (230) is rotatably arranged on the knob platform (103).

6. The iris suturing device according to claim 5, wherein: The knob (230) comprises a circular knob body (231), and an anti-slip texture (232) is provided on the circumferential side surface of the knob body (231).

7. The iris suture instrument according to claim 1, wherein: The front end of the needle seat (210) is provided with a needle connecting groove (211), the groove wall of the needle connecting groove (211) is provided with a needle locking hole (212), and a needle locking member is threadedly connected in the needle locking hole (212); The rear end of the suture needle (320) is inserted into the needle connecting groove (211) and is pressed by the needle locking member.

8. The iris suturing device according to claim 1, characterized in that: A limiting structure for limiting the movement stroke of the needle seat (210) is provided in the handle cavity (101); The limiting structure comprises a limiting groove (214) and a limiting column (104) at least partially extending into the limiting groove (214); The limiting groove (214) is provided on the needle seat (210) along the axial direction of the handle (100), and the limiting column (104) is provided on the cavity wall of the handle cavity (101); Alternatively, the limiting groove (214) is opened on the cavity wall of the handle cavity (101) along the axial direction of the handle (100), and the limiting column (104) is arranged on the needle seat (210).

9. The iris suturing device according to any one of claims 1 to 8, characterized in that: The suturing needle (320) comprises a needle head (321), a transition section (322) and a needle shaft section (323) connected in sequence; The needle (321) is provided with a threading hole (3211); The needle head (321) and the transition section (322) together constitute the puncture portion of the suture needle (320), and the curvature of the puncture portion is α, 3 / 2π<α<2π.

10. The iris suturing device according to claim 9, wherein: The needle head (321) comprises a needle blade in the shape of a triangular pyramid, wherein the edges where the three side surfaces intersect with each other form a cutting edge (3212), and the vertex where the three side surfaces intersect with each other forms a needle tip (3213).

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