A pathological biopsy needle for trabecular meshwork tissue of the eye

Abstract

This invention relates to a biopsy needle for trabecular meshwork tissue of the eye, belonging to the field of medical device technology. It solves the problem of large incisions caused by the large surgical incisions in traditional trabeculectomy procedures, where a scalpel is used to cut a block of ocular tissue containing the trabeculae and deep cornea and sclera. The invention includes a needle, a scraper unit, and a handle. The needle is connected to the handle, the scraper unit is disposed within the needle, and the handle is for the user to hold. The needle is inserted into the patient's eyeball, and the scraper unit is used to cut the trabecular meshwork and Schlemm's canal wall tissue. The scraper unit of this invention is a bendable scraper unit. The first, second, and third sections can form grooved hooks for hooking the trabecular meshwork and Schlemm's canal wall tissue. The grooved hooks of this invention are specifically designed to hook the trabecular meshwork and Schlemm's canal wall tissue, resulting in minimal trauma to the ocular incision.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a pathological biopsy needle for trabecular meshwork tissue of the eye. Background Technology

[0002] Glaucoma disease has historically lacked in-depth research in pathological diagnosis due to the difficulty of tissue sampling and the complexity of specimen preparation during surgery. However, with the development of precision medicine, the pathological diagnosis of glaucoma, its impact on ocular tissues, and changes in ocular structure are attracting increasing attention. There is an urgent clinical need to obtain suitable pathological specimens and sections during glaucoma surgery for glaucoma-related pathological diagnosis, in order to clarify the etiology and guide treatment.

[0003] In ocular histopathology, the trabecular meshwork and Schlemm's canal wall tissues associated with glaucoma are difficult to obtain precisely because they are located deep in the anterior chamber angle and have a delicate structure, with a sampling width of less than 200 micrometers and a thickness of less than 100 micrometers.

[0004] Currently, the procedure often involves using a scalpel to cut a 3mm x 1mm tissue block containing the trabeculae and deep cornea and sclera during trabeculectomy. After fixation, the tissue is sliced, and the trabecular meshwork and Schlemm's canal wall tissue are gradually searched from numerous slices. This procedure results in a large incision in the eye and is time-consuming and laborious. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a pathological biopsy needle for trabecular meshwork tissue of the eye, which solves the problem of large eye incisions caused by the large amount of surgical trauma in traditional trabeculectomy where a scalpel is used to cut a block of eye tissue containing the trabeculae and deep cornea and sclera.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] This invention provides a pathological biopsy needle for trabecular meshwork tissue of the eye, comprising a needle tip, a scraper unit, and a handle. The needle tip is connected to the handle, the scraper unit is disposed inside the needle tip, the handle is for the user to hold, the needle tip is used to insert into the patient's eyeball, and the scraper unit is used to cut trabecular meshwork and Schlemm's canal wall tissue.

[0008] Furthermore, the needle is a tubular needle.

[0009] Furthermore, the tip of the needle is a sharp bevel.

[0010] Furthermore, the scraper unit includes a first section, a second section, and a third section, which are rotatably connected in sequence.

[0011] Furthermore, the scraper unit also includes a push-pull rod, and the third section is fixedly connected to the push-pull rod.

[0012] Furthermore, the second section is configured as multiple sections.

[0013] Furthermore, the radial cross-section of the first section is arc-shaped.

[0014] Furthermore, the first section includes a section body with an arc-shaped radial cross-section, and the hollow portion of the section body is used to accommodate the cut-off small beam network and Schlemm tube wall structure.

[0015] Furthermore, one end of the segment body is provided with a cutting edge, the outer diameter of which is smaller than the outer diameter of the segment body.

[0016] Furthermore, the second section includes a small arc segment and a large arc segment, the curvature of the small arc segment and the large arc segment being the same as the curvature of the main body of the section, and the outer diameter of the small arc segment being the same as the inner diameter of the large arc segment and the main body of the section, and the small arc segment being able to fit into the main body of the section.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) The scraper unit of the present invention is a bendable scraper unit, with the first section, the second section and the third section rotatably connected in sequence, and the third section fixedly connected to the push-pull rod; the second section is provided in multiple parts so that the scraper unit can be flexibly bent; the first section, the second section and the third section can form a hook part with a groove, the hook part with the groove is used to hook the trabecular mesh and Schlemm tube wall tissue; the hook part with the groove is specifically aimed at hooking the trabecular mesh and Schlemm tube wall tissue, resulting in less trauma to the eye incision;

[0019] (2) One end of the traction wire of the present invention is connected to the first section, and the other end of the traction wire is a free end; by pulling the free end, the traction wire can pull the first section, so that the first section, the second section and the third section are bent into a hook shape; the user pushes the push-pull rod towards the needle and slowly releases the traction wire, which can push the first section, the second section and the third section out of the needle, and at the same time bend the first section, the second section and the third section into a hook with a groove, thereby being able to cut the trabecular mesh and Schlemm tube wall tissue;

[0020] (3) The limiting member of the present invention is used to insert into the circumferential groove to prevent the push-pull rod from moving axially. The spring is used to push the limiting member radially so that the limiting member is away from the longitudinal through hole so that the limiting member can be inserted into the circumferential groove to prevent the scraper unit from extending too far into the eyeball and avoid damage to the eyeball. The limiting protrusion can be inserted into the axial groove and connected to the axial groove to prevent the push-pull rod from rotating circumferentially, thereby preventing the scraper unit from bending in the wrong direction and avoiding damage to the eyeball.

[0021] (4) The coil spring of the invention is used to generate resistance when the winding wheel releases the line, so that the pulling line is kept taut; the user does not need to consider the release of the line and the pulling of the pulling line at the same time. The user only needs to push the push-pull rod towards the needle. The operation is simple, reduces the user's workload, and saves surgical time.

[0022] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the biopsy needle of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the scraper unit;

[0025] Figure 3 This is a schematic diagram of the overall structure of the first section;

[0026] Figure 4 This is a schematic diagram of the overall structure of the second section;

[0027] Figure 5 This is a schematic diagram of the overall structure of the third section;

[0028] Figure 6 This is a schematic diagram of the overall structure of the limiting component;

[0029] Figure 7 This is an exploded view of the limiting component;

[0030] Figure 8 This is a schematic diagram of the exploded structure of the tension unit;

[0031] Figure 9 This is a schematic diagram of the overall structure of the drill pipe unit;

[0032] Figure 10 This is a schematic diagram of the longitudinal section structure of the drill pipe unit;

[0033] Figure 11 This is a schematic diagram of the exploded structure of the drill pipe unit.

[0034] Figure label:

[0035] 1-Needle; 2-Scraper unit; 3-Handle; 4-Front positioning branch; 5-Drill tube unit; 21-First section; 22-Second section; 23-Third section; 24-Push-pull rod; 25-Pull line; 26-Limiting ring; 27-Circumferential groove; 28-Axial groove; 31-Handle body; 32-Threading hole; 33-Longitudinal through hole; 34-Limiting component; 35-Spring; 36-Limiting protrusion; 37-Release rod; 41-Winding wheel; 42-Rotating pin; 43-Coil spring; 51-Drill tube; 52-Sealing plate; 53-Pin; 211-Section body; 212-Cutting edge; 213-First clearance part; 214-Connecting protrusion; 221-Small arc segment; 222-Large arc segment; 223-Connecting recess; 224-Second clearance part; 521-Plate body; 522-Warped part. Detailed Implementation

[0036] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0037] Example 1

[0038] A specific embodiment of the present invention, such as Figure 1 As shown, a pathological biopsy needle for trabecular meshwork tissue of the eye (hereinafter referred to as biopsy needle) includes a needle head 1, a scraper unit 2 and a handle 3. The needle head 1 is connected to the handle 3. The scraper unit 2 is disposed inside the needle head 1. The handle 3 is used by the user to hold the needle head 1 and insert it into the patient's eyeball. The scraper unit 2 is used to cut trabecular meshwork and Schlemm's canal wall tissue.

[0039] Preferably, such as Figure 1 As shown, needle 1 is a tubular needle with a sharp bevel at the end to allow it to be inserted into the patient's eyeball.

[0040] Preferred, such as Figure 2As shown, the scraper unit 2 is a bendable scraper unit. The scraper unit 2 includes a first section 21, a second section 22, a third section 23, and a push-pull rod 24. The first section 21, second section 22, and third section 23 are rotatably connected in sequence, and the third section 23 is fixedly connected to the push-pull rod 24. Multiple second sections 22 are provided to allow the scraper unit 2 to bend flexibly. The push-pull rod 24 passes through the handle 3 and pushes or pulls the first section 21, second section 22, and third section 23 into the needle 1. The first section 21, second section 22, and third section 23 can form a grooved hook portion, which is used to hook trabecular meshwork and Schlemm's tube wall tissue. The grooved hook portion is specifically designed to hook trabecular meshwork and Schlemm's tube wall tissue, minimizing trauma from the eye incision.

[0041] Preferably, such as Figure 3 As shown, the radial cross-section of the first section 21 is arc-shaped to accommodate the cut trabecular mesh and Schlemm tube wall tissue. The first section 21 includes a section body 211, which has an arc-shaped radial cross-section and includes a hollow portion for accommodating the cut trabecular mesh and Schlemm tube wall tissue. To facilitate cutting the trabecular mesh and Schlemm tube wall tissue, one end of the section body 211 is provided with a cutting edge 212, the outer diameter of which is smaller than the outer diameter of the section body 211. To facilitate the retraction of the scraper unit 2 into the needle 1, the other end of the section body 211 is provided with a first clearance portion 213, which is sloped and has an outer diameter smaller than the outer diameter of the section body 211. To rotatably connect the first section 21 to the second section 22, the first section 21 also includes a connecting protrusion 214, which is disposed on the inner wall of the end of the section body 211. Preferably, there are two connecting protrusions 214, which are symmetrically arranged on the inner walls of both sides of the end of the section body 211 with the center of the arc as the center line.

[0042] Preferred, such as Figure 3 and Figure 4 As shown, the second section 22 includes a small arc segment 221 and a large arc segment 222. The arc of the small arc segment 221 and the large arc segment 222 is the same as the arc of the main body 211. The outer diameter of the small arc segment 221 is the same as the inner diameter of the large arc segment 222 and the main body 211. The small arc segment 221 can be fitted with the main body 211.

[0043] Preferably, the second section 22 further includes connecting protrusions 214, which are disposed on the inner wall of the end of the large arc segment 222. There are two connecting protrusions 214, which are symmetrically disposed on the inner walls of both sides of the end of the large arc segment 222 relative to the center line of the large arc segment 222.

[0044] Preferably, the second section 22 further includes a connecting recess 223, which is disposed at the end of the small arc segment 221. The connecting protrusion 214 of the first section 21 can be inserted into the connecting recess 223 of the second section 22, and the first section 21 can rotate around the connecting recess 223 of the second section 22. The connecting protrusion 214 of the first second section 22 can be inserted into the connecting recess 223 of the second second section 22, and the first second section 22 can rotate around the connecting recess 223 of the second second section 22. There are two connecting recesses 223, which are symmetrically disposed on the outer walls of both sides of the small arc segment 221 relative to the center line of the large arc segment 222.

[0045] Preferably, to facilitate the retraction of the second section 22 into the needle 1, the end of the large arc segment 222 is provided with a first clearance portion 213, which is sloped and has an outer diameter smaller than that of the large arc segment 222. To facilitate the rotation of the first section 21 towards the hollow portion, the end of the small arc segment 221 is provided with a second clearance portion 224, which is sloped and has an outer diameter smaller than that of the small arc segment 221.

[0046] Preferred, such as Figure 5 As shown, the third section 23 includes a small arc segment 221 and a large arc segment 222. The large arc segment 222 is fixedly connected to the push-pull rod 24. The end of the small arc segment 221 is provided with a connecting recess 223 and a second clearance part 224.

[0047] Preferred, such as Figure 2 As shown, to enable the scraper unit 2 to bend, the scraper unit 2 also includes a pull wire 25. One end of the pull wire 25 is connected to the first section 21, and the other end of the pull wire 25 is a free end. By pulling the free end, the pull wire 25 can pull the first section 21, causing the first section 21, the second section 22, and the third section 23 to bend into a hook shape, thereby enabling the cutting of the small beam mesh and Schlemm tube wall tissue.

[0048] Preferably, to limit the range of motion of the traction wire 25, the scraper unit 2 further includes multiple limiting rings 26, which are respectively disposed on the side walls of the second section 22 and the third section 23. The traction wire 25 passes through the limiting rings 26, which prevent the traction wire 25 from detaching from the second section 22 and the third section 23, thereby preventing the traction wire 25 from causing damage to the eyeball.

[0049] Preferred, such as Figure 6 and Figure 8As shown, the handle 3 includes a handle body 31, a threading hole 32, and a longitudinal through hole 33. One opening of the threading hole 32 is on the outer wall of the handle body 31, and the other opening of the threading hole 32 is in the longitudinal through hole 33. The longitudinal through hole 33 passes through the handle body 31 and has openings at both ends of the handle body 31. One opening of the longitudinal through hole 33 is connected to the needle 1. The longitudinal through hole 33 is used to accommodate the scraper unit 2. The push-pull rod 24 can slide along the longitudinal through hole 33. The pull wire 25 is disposed between the push-pull rod 24 and the needle 1, and the pull wire 25 can pass through the threading hole 32. The free end of the pull wire 25 is disposed outside the outer wall of the handle body 31. The user pushes the push-pull lever 24 toward the needle 1 and slowly releases the traction wire 25, which can push the first section 21, the second section 22 and the third section 23 out of the needle 1, and at the same time bend the first section 21, the second section 22 and the third section 23 into a hook shape, thereby cutting the trabecular mesh and Schlemm tube wall tissue.

[0050] Compared to existing technologies, the scraper unit 2 is a bendable scraper unit. The scraper unit 2 includes a first section 21, a second section 22, a third section 23, and a push-pull rod 24. The first section 21, the second section 22, and the third section 23 are rotatably connected in sequence, and the third section 23 is fixedly connected to the push-pull rod 24. Multiple second sections 22 are provided so that the scraper unit 2 can be flexibly bent. The push-pull rod 24 is used to pass through the handle 3 and push out or pull in the needle 1 through the first section 21, the second section 22, and the third section 23. The first section 21, the second section 22, and the third section 23 can form a grooved hook portion, which is used to hook the trabecular meshwork and Schlemm's tube wall tissue. The grooved hook portion is specifically designed to hook the trabecular meshwork and Schlemm's tube wall tissue, resulting in less trauma to the eye incision. One end of the traction wire 25 is connected to the first section 21, and the other end of the traction wire 25 is a free end. By pulling the free end, the traction wire 25 can pull the first section 21, causing the first section 21, the second section 22, and the third section 23 to bend into a hook shape. The user pushes the push-pull rod 24 towards the needle 1 and slowly releases the traction wire 25, which can push the first section 21, the second section 22, and the third section 23 out of the needle 1, and at the same time bend the first section 21, the second section 22, and the third section 23 into a hook with a groove, thereby enabling the cutting of trabecular meshwork and Schlemm tube wall tissue.

[0051] Example 2:

[0052] To limit the length and bending direction of the scraper unit 2 inside the eyeball, such as Figure 2As shown, based on Embodiment 1, this embodiment improves the scraper unit 2 and the handle 3. The scraper unit 2 is equipped with a circumferential groove 27 and an axial groove 28, and the handle 3 is equipped with a limiting component. The limiting component is used to connect with the axial groove 28 and the circumferential groove 27 to limit the push-pull rod 24, thereby limiting the bending direction and the length of the scraper unit 2 that extends into the eyeball, preventing the scraper unit 2 from extending too far into the eyeball and bending in the wrong direction, thus avoiding damage to the eyeball.

[0053] Preferably, the circumferential groove 27 is provided on the outer wall of the push-pull rod 24 along the circumference of the push-pull rod 24, and the axial groove 28 is provided on the outer wall of the push-pull rod 24 along the axial direction of the push-pull rod 24.

[0054] like Figure 6 and Figure 7 As shown, the handle 3 also includes a limiting component groove and an end cap (not shown in the figure). The end cap can be connected to the handle body 31. The limiting component groove is disposed on the handle body 31. The limiting component is disposed in the limiting component groove. The end cap is used to close the limiting component groove to prevent the limiting component from axially disengaging from the limiting component groove.

[0055] Preferably, the limiting component includes a limiting member 34 and a spring 35. The limiting member 34 is disposed on the limiting component groove. One end of the spring 35 is connected to the limiting member 34, and the other end of the spring 35 is connected to the limiting component groove. The limiting member 34 is used to insert into the circumferential groove 27 to prevent the push-pull rod 24 from moving axially. The spring 35 is used to radially push the limiting member 34, so that the limiting member 34 is away from the longitudinal through hole 33, so that the limiting member 34 can be inserted into the circumferential groove 27, preventing the scraper unit 2 from extending too far into the eyeball and avoiding damage to the eyeball. For example, the limiting member 34 is a limiting ring, which can be sleeved with the push-pull rod 24 to prevent the limiting member 34 from disengaging from the push-pull rod 24.

[0056] Preferably, the limiting component further includes a limiting protrusion 36, which is disposed on the inner wall of the limiting member 34. The limiting protrusion 36 can be inserted into the axial groove 28 and connected to the axial groove 28 to prevent the push-pull rod 24 from rotating circumferentially, thereby preventing the scraper unit 2 from bending in the wrong direction and avoiding damage to the eyeball.

[0057] Preferably, the limiting assembly further includes a release rod 37, which is disposed on the outer wall of the limiting member 34 and passes through the limiting assembly groove. The release rod 37 is used to release the push-pull rod 24. By pressing the release rod 37 towards the spring 35, the limiting member 34 can disengage from the circumferential groove 27, and the push-pull rod 24 can slide along the longitudinal through hole 33.

[0058] Compared with Embodiment 1, the limiting member 34 is used to insert into the circumferential groove 27 to prevent the push-pull rod 24 from moving axially, and the spring 35 is used to radially push the limiting member 34 so that the limiting member 34 is away from the longitudinal through hole 33, so that the limiting member 34 can be inserted into the circumferential groove 27, preventing the scraper unit 2 from extending too far into the eyeball and avoiding damage to the eyeball; the limiting protrusion 36 can be inserted into the axial groove 28 and connected to the axial groove 28 to prevent the push-pull rod 24 from rotating circumferentially, thereby preventing the scraper unit 2 from bending in the wrong direction and avoiding damage to the eyeball.

[0059] Example 3:

[0060] In Example 1, the user needs to push the push-pull lever 24 towards the needle 1 while simultaneously and slowly releasing the pull line 25 to allow the first section 21, second section 22, and third section 23 to be pushed out of the needle 1, causing the first section 21 to bend. The release of the pull line 25 requires balancing release and pulling, making the operation cumbersome. Therefore, as... Figure 1 As shown, based on Embodiment 1 or 2, Embodiment 3 adds a traction unit 4 to the handle 3. The traction unit 4 is used to provide axial traction force to the traction line 25 when releasing the traction line 25. The user does not need to consider the release of the line and the pulling of the traction line 25 at the same time. He / she only needs to push the push-pull rod 24 towards the needle 1. The operation is simple, reduces the user's workload, and saves surgical time.

[0061] Specifically, such as Figure 8 As shown, the pulling unit 4 includes a winding wheel 41, a pivot pin 42, and a coil spring 43. The pivot pin 42 is a T-shaped pin, and the end of the small-diameter section of the pivot pin 42 is connected to the handle body 31. The winding wheel 41 is sleeved on the small-diameter section of the pivot pin 42 and can rotate around the pivot pin 42. The large-diameter section of the pivot pin 42 is used to prevent the winding wheel 41 from detaching from the pivot pin 42. The free end of the pull line 25 can be wound around the winding wheel 41, which is used to hold the pull line 25. One end of the coil spring 43 is connected to the pivot pin 42, and the other end is connected to the winding wheel 41. The coil spring 43 is used to generate resistance when the winding wheel 41 releases the line, keeping the pull line 25 taut.

[0062] When the user pushes the push-pull lever 24 toward the needle 1, the pull line 25 is pulled by the first section 21. The elasticity of the coil spring 43 prevents the winding wheel 41 from rotating and keeps the pull line 25 taut. When the force of pushing the push-pull lever 24 is greater than the elasticity of the coil spring 43, the first section 21, the second section 22 and the third section 23 can be pushed out of the needle 1. The winding wheel 41 rotates, keeping the pull line 25 taut and releasing the pull line 25.

[0063] Compared with Embodiment 1 or 2, the coil spring 43 is used to generate resistance when the winding wheel 41 releases the thread, so that the pulling thread 25 is kept taut. The user does not need to consider the thread release and pulling action of the pulling thread 25 at the same time. He only needs to push the push-pull rod 24 towards the needle 1. The operation is simple, reduces the user's workload, and saves surgical time.

[0064] Example 4:

[0065] Examples 1, 2, or 3 utilize the first section 21, the second section 22, and the third section 23 bent into grooved hooks. The trabecular meshwork and Schlemm's tube wall tissue being cut are the entire sheet of tissue swept by the hooks, causing significant damage to the patient's eyes. Therefore, as... Figure 1 and Figure 9 As shown, in Example 4, based on Examples 1, 2 or 3, a drill pipe unit 5 is added, and the push-pull rod 24 is improved into a cylindrical push-pull rod. The drill pipe unit 5 is used to pass through the push-pull rod 24 and, guided by the first section 21, the second section 22 and the third section 23, directionally drills the trabecular mesh and Schlemm tube wall tissue, and completely removes the drilled trabecular mesh and Schlemm tube wall tissue from the eyeball.

[0066] Specifically, such as Figure 10 and Figure 11 As shown, the drill tube unit 5 includes a drill tube 51, which is a flexible tube that can be bent, but with a stiffness greater than that of eye tissue. One end of the drill tube 51 is the drill cutting edge, and the other end is a free end. The user inserts the drill tube 51 into the push-pull rod 24 and pushes the drill tube 51 towards the first section 21. The drill tube 51 can slide along the grooved hooks formed by bending the first section 21, the second section 22, and the third section 23, and drill through the trabecular mesh and Schlemm tube wall tissue.

[0067] The trabecular meshwork and Schlemm tube wall tissue obtained by drilling are strip-shaped and smaller in volume than the sheet-like trabecular meshwork and Schlemm tube wall tissue obtained in Examples 1, 2 or 3, thus causing less damage to the patient's eyes.

[0068] Preferably, in order to completely remove the drilled strip-shaped beam network and Schlemm tube wall tissue from the eyeball, the drill pipe unit 5 further includes a sealing plate groove and a sealing plate 52. The sealing plate groove is disposed on the inner wall of the drill pipe 51, and the sealing plate 52 is disposed within the sealing plate groove. The sealing plate 52 and the sealing plate groove are hinged by a pin 53, and the sealing plate 52 can rotate around the pin 53.

[0069] Preferably, the sealing plate 52 includes a plate body 521 and a warped portion 522. One end of the plate body 521 is rotatably connected to a pin 53, and the other end of the plate body 521 is connected to the warped portion 522. The angle between the warped portion 522 and the plate body 521 is α, and 90°≤α≤180°. The end of the warped portion 522 is provided with a cutting edge, which is located outside the sealing plate groove and inside the drill pipe 51. After the drill tube 51 drills out the trabecular meshwork and Schlemm's tube wall tissue, the tissue inside the drill tube 51 remains connected to the eyeball at the drill tube cutting edge. When the user pulls the drill tube 51 out of the scraper unit 2, relative movement occurs between the drill tube 51 and the tissue inside it. The cutting edge of the warped portion 522 can cut into the tissue inside the drill tube 51, causing the plate body 521 to rotate towards the drill tube cutting edge. As the drill tube 51 continues to move, the plate body 521 inserts into the tissue inside the drill tube 51, and the sealing plate 52 completely severs the trabecular meshwork and Schlemm's tube wall tissue inside the drill tube 51. The remaining trabecular meshwork and Schlemm's tube wall tissue inside the drill tube 51 can be completely removed from the eyeball by the drill tube 51.

[0070] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A biopsy needle for use in the eye trabecular meshwork tissue, characterized in that, The device comprises a needle (1), a scraper unit (2) and a handle (3), the needle (1) is connected with the handle (3), the scraper unit (2) is arranged in the needle (1), the handle (3) is used for holding by a user, the needle (1) is used for pricking into an eyeball of a patient, and the scraper unit (2) is used for cutting trabecular meshwork and Schlemm canal wall tissue. The scraper unit (2) comprises a first section (21), a second section (22), a third section (23), a push-pull rod (24) and a circumferential groove (27), the first section (21), the second section (22) and the third section (23) are rotationally connected in sequence, the third section (23) is fixedly connected with the push-pull rod (24), and the circumferential groove (27) is arranged on an outer wall of the push-pull rod (24) along a circumference of the push-pull rod (24). The handle (3) comprises a handle body (31), a limiting component groove, a limiting member (34) and a spring (35), the limiting component groove is arranged on the handle body (31), the limiting member (34) is arranged on the limiting component groove, one end of the spring (35) is connected with the limiting member (34), the other end of the spring (35) is connected with the limiting component groove, the limiting member (34) is used for being inserted into the circumferential groove (27) to prevent axial movement of the push-pull rod (24), and the spring (35) is used for radially pushing the limiting member (34) so that the limiting member (34) can be inserted into the circumferential groove (27).

2. The biopsy needle for the trabecular meshwork tissue of the eye according to claim 1, wherein The needle (1) is a tubular needle.

3. The biopsy needle for the trabecular meshwork tissue of the eye according to claim 1, wherein An end of the needle (1) is a sharp bevel.

4. The needle for pathological biopsy of the trabecular meshwork tissue according to claim 1, characterized in that, The second section (22) is provided in plurality.

5. The needle for pathological biopsy of the trabecular meshwork tissue according to claim 1, characterized in that, A radial section of the first section (21) is arc-shaped.

6. The needle for pathological biopsy of the trabecular meshwork tissue according to claim 5, characterized in that, The first section (21) comprises a section body (211), a radial section of the section body (211) is arc-shaped, and a hollow portion of the section body (211) is used for containing cut trabecular meshwork and Schlemm canal wall tissue.

7. The needle for pathological biopsy of the trabecular meshwork tissue according to claim 6, characterized in that, One end of the section body (211) is provided with a blade portion (212), and an outer diameter of the blade portion (212) is smaller than an outer diameter of the section body (211).

8. The needle for pathological biopsy of the trabecular meshwork tissue according to claim 7, characterized in that, The second section (22) comprises a small arc segment (221) and a large arc segment (222), the small arc segment (221) and the large arc segment (222) have the same arc as the section body (211), the outer diameter of the small arc segment (221) is the same as the inner diameter of the large arc segment (222) and the section body (211), and the small arc segment (221) can be sleeved with the section body (211).

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