Operation cutting probe and ophthalmologic operation equipment

Abstract

The invention provides an operation cutting probe and ophthalmologic operation equipment, and relates to the technical field of medical instruments, during cutting, a cutting inner tube rotates relative to a cutting outer tube, and a second tube body can be bent, so that in the rotating process of the cutting inner tube, a first tube body generates centrifugal motion, and the cutting inner tube is driven to rotate; therefore, the outer wall of the first pipe body is tightly attached to the inner wall of the cutting outer pipe, the first cutting edge and the second cutting edge are tightly attached to each other and staggered to form the cutting action, and the cutting smoothness is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a surgical cutting probe and ophthalmic surgical equipment. Background Art

[0002] Surgical cutting probes, such as surgical cutting probes, can be used to cut and aspirate intraocular tissue, such as the lens, vitreous, retina, etc.

[0003] In the prior art, the cutting probe has an inner tube and an outer tube, both of which are rigid parts, wherein the inner tube rotates coaxially with a small air gap in the outer tube. The inner tube and the outer tube are provided with blades correspondingly, and a shearing action is generated when the two blades on the inner tube and the outer tube meet.

[0004] However, due to the fixed tolerance between the outer diameter of the inner tube and the inner diameter of the outer tube, there is a problem of difficulty in cutting. Summary of the invention

[0005] The object of the present invention is to provide a surgical cutting probe and an ophthalmic surgical device to alleviate the technical problem of poor cutting fluency of the existing probe.

[0006] In a first aspect, the present invention provides a surgical cutting probe, comprising:

[0007] A cutting outer tube, wherein a first notch is provided on a distal side surface of the cutting outer tube, and a circumferential edge of the first notch forms a first blade;

[0008] A cutting inner tube, the cutting inner tube is located inside the cutting outer tube, and the hollow cavity of the cutting inner tube forms a suction channel; the cutting inner tube comprises: a first tube body and a second tube body, the proximal end of the first tube body is connected to the distal end of the second tube body, a second notch is provided on the side of the first tube body, and the circumferential edge of the second notch forms a second blade; the second tube body is bendable so that the outer wall of the first tube body fits the inner wall of the cutting outer tube when rotating;

[0009] The cutting inner tube can rotate around the cutting outer tube so that the first blade and the second blade cooperate to perform rotational cutting.

[0010] Furthermore, the second tube body is made of silk threads.

[0011] Furthermore, in the circumferential direction, the number of the first notches on the side wall of the first tube body is at least two.

[0012] Furthermore, a concave structure concave inwardly is provided on the side wall of the cutting outer tube;

[0013] An inwardly recessed annular groove is provided on the side wall of the cutting inner tube, and the recessed structure is located at the proximal end side of the first tube body. The recessed structure is used to prevent the first tube body from moving toward the proximal end side.

[0014] Furthermore, a first sealing layer is provided on the side wall of the cut outer tube;

[0015] And / or, a second sealing layer is provided on the side wall of the second tube body.

[0016] Further, the cut outer tube has a fixed bending degree or the cut outer tube is bendable.

[0017] Further, the cut outer tube is bendable;

[0018] At least two pulling wires are connected to the cutting outer tube, and the pulling wires are used to adjust the bending degree of the cutting outer tube.

[0019] Furthermore, the cutting outer tube includes a snake-bone structure so that the cutting outer tube can be bent.

[0020] Furthermore, the cutting outer tube includes: a first section, a second section and a third section which are sequentially connected from the distal end to the proximal end, and the first notch is arranged on the first section, and the second section is bendable.

[0021] In a second aspect, the present invention provides an ophthalmic surgical device, comprising the above-mentioned surgical cutting probe.

[0022] The present invention has at least the following advantages or beneficial effects:

[0023] The surgical cutting probe provided by the present invention comprises: a cutting outer tube and a cutting inner tube, wherein the distal end side surface of the cutting outer tube is provided with a first notch, and the circumferential edge of the first notch forms a first blade; the cutting inner tube is located inside the cutting outer tube, and the hollow cavity of the cutting inner tube forms a suction channel; the cutting inner tube comprises: a first tube body and a second tube body, the proximal end of the first tube body is connected to the distal end of the second tube body, the side surface of the first tube body is provided with a second notch, and the circumferential edge of the second notch forms a second blade; the second tube body is bendable so that the outer wall of the first tube body fits the inner wall of the cutting outer tube when rotating; the cutting inner tube can rotate around the cutting outer tube so that the first blade and the second blade cooperate to perform rotational cutting.

[0024] During cutting, the cutting inner tube rotates relative to the cutting outer tube. Since the second tube body can be bent, the first tube body will generate centrifugal motion during the rotation of the cutting inner tube, so that the outer wall of the first tube body is close to the inner wall of the cutting outer tube. The first blade and the second blade are closely attached to each other and interlaced to form a cutting action, thereby improving the smoothness of the cutting.

[0025] The ophthalmic surgical device provided by the present invention includes the above-mentioned surgical cutting probe. Since the ophthalmic surgical device provided by the present invention uses the above-mentioned surgical cutting probe, the ophthalmic surgical device provided by the present invention also has the advantages of the surgical cutting probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a surgical cutting probe provided in Example 1 of the present invention;

[0028] Figure 2 for Figure 1 Cross-sectional view along the B-B direction;

[0029] Figure 3 for Figure 1 Cross-sectional view along the H-H direction;

[0030] Figure 4 for Figure 1 A perspective view of a surgical cutting probe;

[0031] Figure 5 for Figure 1 Schematic diagram of the cutting inner tube of the surgical cutting probe;

[0032] Figure 6 for Figure 5 Sectional view of F-F in the middle;

[0033] Figure 7 for Figure 1 A schematic diagram of a first tube body of a surgical cutting probe;

[0034] Figure 8 for Figure 1 A front view of the first tube body of the surgical cutting probe;

[0035] Fig. 9 for Figure 8 Sectional view along the G-G direction;

[0036] Fig.10 for Figure 1 A schematic diagram showing a curved shape of the cut outer tube;

[0037] Fig.11 for Figure 1 Schematic diagram of the middle-cut outer tube in another bending form;

[0038] Fig.12 A schematic diagram of another surgical cutting probe provided in Example 1 of the present invention;

[0039] Fig.13 A schematic diagram of a surgical cutting probe provided in Example 2 of the present invention;

[0040] Fig.14 for Fig.13 Cross-sectional view along the J-J direction;

[0041] Fig.15 for Fig.13 Schematic diagram of the cut outer tube of the surgical cutting probe;

[0042] Fig.16 for Fig.13 A front view of a cut outer tube of a surgical cutting probe;

[0043] Fig.17 for Fig.15 Middle cutting inner tube - cross-sectional view in the direction of cutting inner tube;

[0044] Fig.18 A schematic diagram of cutting an outer tube of another surgical cutting probe provided in Example 2 of the present invention;

[0045] Fig.19 for Fig.18 A front view of a cut outer tube of a surgical cutting probe;

[0046] Fig. 20 for Fig.18 Cross-sectional view along the K-K direction.

[0047] Icons: 100 - cutting outer tube; 110 - first notch; 111 - first blade; 120 - concave point; 130 - concave ring; 140 - first sealing layer; 150 - plugging structure;

[0048] 200 - cutting inner tube; 210 - first tube body; 211 - second notch; 2111 - second blade; 212 - mounting step; 220 - second tube body; 221 - thread; 230 - second sealing layer;

[0049] 300 – traction line;

[0050] 400 - snake bone structure;

[0051] 510 - first paragraph; 520 - second paragraph; 530 - third paragraph. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0056] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The surgical cutting probe provided by the present invention can be used for cutting and aspirating intraocular tissues, such as the lens, vitreous body, retina, etc., especially for vitrectomy. The surgical cutting probe can also be used for cutting tissues in other parts, such as intravascular plaque removal, prostate cysts, etc.

[0059] Example 1

[0060] like Figure 1 and Figure 2 As shown, the probe comprises: a cutting outer tube 100 and a cutting inner tube 200, wherein the cutting inner tube 200 performs a rotational motion in the cutting outer tube 100. The inner cutting outer tube 100 has a suction opening at the distal end, namely the first notch 110 mentioned below, for removing the shredded intraocular tissue debris.

[0061] In this embodiment, the cutting outer tube 100 has a fixed curvature. In other embodiments, the cutting outer tube 100 may also be a straight tube, that is, the suction opening is 90° to the horizontal direction (the axial direction of the handle). Fig.10 and Fig.11 As shown, the side with the suction opening at the distal end may be bent upward so that the suction opening forms an acute angle A1 with the horizontal direction, or the side with the suction opening at the distal end may be bent downward so that the suction opening forms an obtuse angle A2 with the horizontal direction.

[0062] The cutting outer tube 100 may be a metal capillary tube with an outer diameter in the range of 0.4 mm to 0.8 mm, and common materials include stainless steel, nickel-titanium alloy, cobalt-nickel alloy, and the like.

[0063] like Figure 2 As shown, the distal end of the cut outer tube 100 is sealed and has a sealing structure 150 to prevent excessive traction on intraocular tissue during surgery.

[0064] The distal end side of the cutting outer tube 100 is provided with a first notch 110, and the circumferential edge of the first notch 110 forms a first blade 111 for cutting intraocular tissue. At the same time, the first notch 110 provides an inlet for suctioning and removing intraocular fluid and debris.

[0065] The inner cutting tube 200 is located inside the outer cutting tube 100 , and the hollow cavity of the inner cutting tube forms a suction channel, and the cut tissue is discharged from the suction system.

[0066] The cutting inner tube 200 includes: a first tube body 210 and a second tube body 220, wherein the proximal end of the first tube body 210 is connected to the distal end of the second tube body 220. The first tube body 210 is cylindrical, and the inner wall of the proximal side of the first tube body 210 has a mounting step 212 for accommodating the second tube body 220. The first tube body 210 and the second tube body 220 can be assembled and connected by bonding or laser welding. The side of the first tube body 210 has a second notch 211, and the circumferential edge of the second notch 211 forms a second blade 2111; the second tube body 220 can be bent so that the outer wall of the first tube body 210 fits the inner wall of the cutting outer tube 100 when rotating.

[0067] like Figure 7 - Fig. 9 As shown, the number of the second notches 211 can be one, two, or even more. The number of the second notches 211 can be 1-5, preferably 2-4, according to the specification setting. The edge of the second notch 211 forms a sharp second edge, which interacts with the first edge of the cutting outer tube 100 when the first tube body 210 rotates, generating a shear force to cut the intraocular tissue. In this example, the number of notches is 3, so 3 cutting edges are generated. When the cutting inner tube 200 performs high-speed rotation (rotation speed 5W-20W RPM), 3 cuts are achieved in each rotation cycle, so at least 15W-60W cutting effects can be achieved per minute, which can reduce the traction on fragile tissues (such as retina) during the cutting process, and has higher safety performance.

[0068] The second tube 220 can be made of a flexible material, and the second tube 220 can be bent. That is, the material of the first tube 210 can be metal, which is not bendable, while the second tube 220 can be bent. The second tube 220 can be woven from a thread 221. Specifically, Figure 5 and Figure 6 As shown, the second tube body 220 is usually woven with metal or polymer wire 221 with a diameter of 0.01-0.2 mm. Common metal materials include stainless steel 304, 316, nickel-titanium alloy and other biocompatible metal materials, and polymer wires include PA, PI, PEFE, FEP and the like. The wire 221 is usually circular, but in order to increase the inner diameter of the second tube body 220 and reduce the outer diameter of the second tube body 220, wire 221 with a special cross-section, such as an elliptical, rectangular flat wire, etc. can also be used instead. The second tube body 220 is usually processed by weaving, which can usually be a single-layer weaving, or a double-layer or multi-layer one. The outer diameter of the cut inner tube 200 can also be reduced by grinding, pressing, grinding and other processes.

[0069] The proximal end of the second tube 220 is connected to the vitrectomy handle, which is provided with rotational power by a pneumatic turbine or a motor, and the rotation speed is 100-200.000RPM (Revolution Per Minute). Figure 3 and Figure 4 As shown, the cutting inner tube 200 can rotate around the cutting outer tube 100 so that the first blade 111 and the second blade 2111 cooperate to perform rotational cutting.

[0070] In this embodiment, the cutting outer tube 100 has a fixed curvature. Since the second tube body 220 can be bent, the second tube body 220 can rotate in the cutting outer tube 100 which has a curvature itself. The curvature of the cutting inner tube 200 keeps changing during rotation. After the cutting inner tube 200 rotates relative to the cutting outer tube 100, the first blade 111 and the second blade 2111 at the distal end intersect with each other to form a cutting action. The cut tissue enters the cutting outer tube 100 and is then discharged from the suction channel in the cutting inner tube 200. The cutting outer tube 100 in a bent state can better adapt to ophthalmic surgery, can be closer to the retina, and safely cut the surrounding tissue. In addition, when the cutting outer tube 100 can be bent to different angles, it can also be flexibly changed according to the surgery, and more complex actions can be achieved.

[0071] The side wall of the cutting outer tube 100 is provided with an inwardly recessed structure, and the recessed structure is located at the proximal side of the first tube body 210 , and the recessed structure is used to prevent the first tube body 210 from moving toward the proximal side.

[0072] Specifically, Figure 1 and Fig.12 As shown, the concave structure can be a concave point 120 or an annular concave ring 130. The concave structure limits the first tube body 210 in the axial direction, so that the first tube body 210 can only rotate relative to the cutting outer tube 100, but cannot move axially toward the proximal side. The concave structure is usually formed by symmetrical punching points (2-5 in number) or directly punching into a concave ring 130 after the cutting inner tube 200 and the cutting outer tube 100 are assembled, so that the first tube body 210 can move within a limited range, thereby producing a cutting effect.

[0073] like Fig.13As shown, a first sealing layer 140 is provided on the side wall of the cut outer tube 100. The first sealing layer 140 can be formed by a heat shrink tube or by a coating. The first sealing layer 140 is located outside the outer cut tube. Taking the heat shrink tube as an example to form the first sealing layer 140, the heat shrink tube is gathered on the outer surface of the cut outer tube 100, usually a PET or PTFE heat shrink tube, and is formed on the outer surface of the cut outer tube 100 by heat shrinking. For example, a lubricating and sealing surface coating is generated on the outer surface of the cut outer tube 100 by an extraction process, and PTFE, PI, parylene coating, etc. can be used.

[0074] like Fig.14 As shown, a second sealing layer 230 is provided on the side wall of the second tube body 220. The second sealing layer 230 can be formed by a heat shrink tube, usually a PET or PTFE heat shrink tube, which is heat-shrinked on the outer surface of the second tube body 220. The functions include: 1. It can make the wires 221 between the braided twisted ropes more tight, which is convenient for transmitting the rotational torque; 2. The second tube body 220 forms a suction flow channel with sealing to prevent leakage; 3. It enhances the lubricity between the second tube body 220 and the outer tube to reduce the resistance to rotational movement. The heat shrink tube can be replaced by a coating, such as producing a lubricating and sealing surface coating on the outer surface of the second tube body 220 through an extraction process, and PTFE, PI, parylene coating, etc. can be used.

[0075] Example 2

[0076] Different from the inherent bending degree of the cutting outer tube 100 in Example 1, in this embodiment, the cutting outer tube 100 is bendable, that is, the operator can bend the cutting outer tube 100 into different curvatures. Compared with the pre-bent probe in Example 1, the present embodiment adopts a partially adjustable flexible cutting outer tube 100 to replace the rigid cutting outer tube 100, and a traction line 300 is added inside the cutting outer tube 100. The traction line 300 is controlled to realize the arbitrary angle bending function of the distal end of the probe, and the number of traction lines 300 is at least 2.

[0077] In one possible implementation, Fig.15 - Fig.17 As shown, the outer cutting tube 100 is laser cut or etched to generate a flexible snake bone structure 400, so that the outer cutting tube 100 can be bent along with the flexible inner cutting tube 200, and the bending can be adjusted at any angle through the traction line 300 inside the probe. The bending function at any angle can make the operation more flexible, achieve more complex movements, get closer to the retina, and safely cut the surrounding tissues.

[0078] Another implementation method in this embodiment is as follows: Fig.18 - Fig. 20As shown, the cutting outer tube 100 is roughly divided into three sections, the first section 510, the second section 520 and the third section 530. The third section 530 at the proximal end is a supporting stainless steel tube; the second section 520 in the middle is a flexible braided twisted rope or spring; the first section 510 at the distal end is a component with a blocking structure 150. The second section 520 is connected to the first section 510 and the third section 530 respectively by laser welding. The segmented structure allows the distal component to be realized by drilling or centering processing, reducing the difficulty of realizing the blocking structure 150.

[0079] The ophthalmic surgical device provided by the present invention includes the above-mentioned surgical cutting probe. Since the ophthalmic surgical device provided by the present invention uses the above-mentioned surgical cutting probe, the ophthalmic surgical device provided by the present invention also has the advantages of the surgical cutting probe.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A surgical cutting probe, characterized in that: include: A cutting outer tube (100), wherein a first notch (110) is provided on a distal side surface of the cutting outer tube (100), and a circumferential edge of the first notch (110) forms a first blade (111); A cutting inner tube (200), wherein the cutting inner tube (200) is located inside the cutting outer tube (100), and the hollow cavity of the cutting inner tube forms a suction channel; the cutting inner tube (200) comprises: a first tube body (210) and a second tube body (220), wherein the proximal end of the first tube body (210) is connected to the distal end of the second tube body (220), a second notch (211) is provided on the side surface of the first tube body (210), and the circumferential edge of the second notch (211) forms a second blade (2111); the second tube body (220) is bendable so that the outer wall of the first tube body (210) fits the inner wall of the cutting outer tube (100) when rotating; The cutting inner tube (200) is capable of rotating around the cutting outer tube (100) so that the first blade (111) and the second blade (2111) cooperate to perform rotational cutting.

2. The surgical cutting probe according to claim 1, characterized in that: The second tube body (220) is woven from silk threads (221).

3. The surgical cutting probe according to claim 1, characterized in that: In the circumferential direction, the number of the first notches (110) on the side wall of the first tube (210) is at least two.

4. The surgical cutting probe according to claim 1, characterized in that: An inwardly recessed structure is provided on the side wall of the cutting outer tube (100), and the recessed structure is located on the proximal side of the first tube body (210). The recessed structure is used to prevent the first tube body (210) from moving toward the proximal side.

5. The surgical cutting probe according to claim 1, characterized in that: A first sealing layer (140) is provided on the side wall of the cutting outer tube (100); And / or, a second sealing layer (230) is provided on the side wall of the second tube body (220).

6. The surgical cutting probe according to claim 1, characterized in that: The cut outer tube has a fixed bending degree or the cut outer tube is bendable.

7. The surgical cutting probe according to claim 1, characterized in that: The cutting outer tube (100) is bendable; At least two pulling wires (300) are connected to the cutting outer tube (100), and the pulling wires (300) are used to adjust the bending degree of the cutting outer tube (100).

8. The surgical cutting probe according to claim 1, characterized in that: The cutting outer tube (100) comprises a snake-bone structure (400) so that the cutting outer tube (100) can be bent.

9. The surgical cutting probe according to claim 1, characterized in that: The cutting outer tube (100) comprises: a first section (510), a second section (520) and a third section (530) which are sequentially connected from the distal end to the proximal end, and the first notch (110) is arranged on the first section (510), and the second section (520) is bendable.

10. An ophthalmic surgical device, characterized in that: A surgical cutting probe comprising any one of claims 1 to 9.

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