Pathological biopsy needle for eye trabecular meshwork tissue

Abstract

The invention relates to a pathological biopsy needle for eye trabecular meshwork tissue, belongs to the technical field of medical instruments, and solves the problem that in the traditional trabectomy in the prior art, an eye tissue block containing trabecula and deep sclera is cut by a surgical blade, and the trauma of an eye incision is large. The device comprises a needle head, a scraper unit and a handle, the needle head is connected with the handle, the scraper unit is arranged in the needle head, the handle is used for being held by a user, the needle head is used for being inserted into an eyeball of a patient, and the scraper unit is used for cutting trabecular mesh and Schlemm tube wall tissue. The scraper unit is a bendable scraper unit, the first section, the second section and the third section can form a hook part with a groove, and the hook part with the groove is used for hooking trabecular meshes and Schlemm pipe wall tissues. The hook part with the groove is specially aligned to trabecular meshes and Schlemm tube wall tissues for hooking, and the trauma of an eye incision is small.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a pathological biopsy needle for eye trabecular meshwork tissue. Background Art

[0002] Glaucoma has historically been understudied in terms of pathological diagnosis due to the difficulty of obtaining tissue during surgery and the complexity of specimen preparation. With the advancement of precision medicine, the pathological diagnosis of glaucoma, its impact on ocular tissue, and changes in ocular structure are gaining increasing attention. There is an urgent need to obtain diseased tissue suitable for pathological specimen preparation and sectioning during glaucoma surgery to conduct glaucoma-related pathological diagnosis, clarify the cause, and guide treatment.

[0003] In ocular tissue pathology, the trabecular meshwork and Schlemm's canal wall tissues related to glaucoma are located deep in the anterior chamber angle of the eye and have a fine structure. The width of the samples is less than 200 microns and the thickness is less than 100 microns, making it difficult to obtain samples accurately.

[0004] Currently, trabeculectomy is usually performed using a surgical blade to cut a 3mm x 1mm block of eye tissue containing trabeculae and the deep cornea and sclera. The block is then fixed and sliced, and the trabecular meshwork and Schlemm's canal wall tissue are gradually found from the numerous slices. The eye incision is very traumatic and the surgery is time-consuming and labor-intensive. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a pathological biopsy needle for the trabecular meshwork tissue of the eye, which is used to solve the problem of severe trauma to the eye caused by cutting out a block of eye tissue containing trabeculae and deep cornea and sclera by a surgical blade during traditional trabeculectomy in the prior art.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

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

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

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

[0010] Furthermore, the scraper unit includes a first section, a second section and a third section, and the first section, the second section and the third section 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 set to be multiple.

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

[0014] Furthermore, the first section includes a section body, the radial cross-section of the section body is arc-shaped, and the hollow portion of the section body is used to accommodate the cut trabecular meshwork and Schlemm's canal wall tissue.

[0015] Furthermore, a blade portion is provided at one end of the joint body, and an outer diameter of the blade portion is smaller than an outer diameter of the joint 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 is the same as the curvature of the section body, and the outer diameter of the small arc segment is the same as the inner diameter of the large arc segment and the section body, and the small arc segment can be socketed with the section body.

[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, wherein the first section, the second section, and the third section are rotatably connected in sequence, and the third section is fixedly connected to the push-pull rod; the second section is provided in a plurality so that the scraper unit can be flexibly bent; the first section, the second section, and the third section can form a hook portion with a groove, and the hook portion with a groove is used to hook the trabecular meshwork and the Schlemm's tube wall tissue; the hook portion with a groove is specifically aligned with the trabecular meshwork and the Schlemm's tube wall tissue for hooking, and the trauma of the eye incision is small;

[0019] (2) One end of the pull wire of the present invention is connected to the first section, and the other end of the pull wire is a free end; by pulling the free end, the pull 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 rod toward the needle head and slowly releases the pull wire, so that the first section, the second section, and the third section can be pushed out of the needle head, and at the same time, the first section, the second section, and the third section can be bent into a hook with a groove, thereby being able to cut the trabecular meshwork and the Schlemm canal wall tissue;

[0020] (3) The limiter of the present invention is used to be inserted into the circumferential groove to prevent the push-pull rod from moving axially. The spring is used to radially push the limiter so that the limiter is away from the longitudinal through hole so that the limiter can be inserted into the circumferential groove to prevent the scraper unit from extending too far into the eyeball and thus avoiding damage to the eyeball. The limiter 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 thus avoiding damage to the eyeball.

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

[0022] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained as particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the overall structure of the biopsy needle of the present invention;

[0024] Figure 2 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 the overall structure diagram of Section 2;

[0027] Figure 5 This is the overall structure diagram of Section 3;

[0028] Figure 6 It is a schematic diagram of the overall structure of the limit assembly;

[0029] Figure 7 Schematic diagram of the exploded structure of the limit assembly;

[0030] Figure 8 Schematic diagram of the decomposition structure of the pulling unit;

[0031] Figure 9 Schematic diagram of the overall structure of the drill pipe unit;

[0032] Figure 10 Schematic diagram of the longitudinal structure of the drill pipe unit;

[0033] Figure 11 Schematic diagram of the exploded structure of the drill pipe unit.

[0034] Reference numerals:

[0035] 1-needle head; 2-scraper unit; 3-handle; 4-front positioning branch; 5-drill pipe 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 member; 35-spring; 36-limiting protrusion; 37-release lever; 41-winding wheel; 42-rotating shaft pin; 43-coil spring; 51-drill pipe; 52-sealing plate; 53-pin; 211-section body; 212-blade; 213-first yielding part; 214-connecting protrusion; 221-small arc segment; 222-large arc segment; 223-connecting pit; 224-second yielding part; 521-plate body; 522-warping part. DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0037] Example 1

[0038] A specific embodiment of the present invention, 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 1, a scraper unit 2 and a handle 3. The needle 1 is connected to the handle 3, and the scraper unit 2 is arranged in the needle 1. The handle 3 is used by the user to hold and insert the needle 1 into the patient's eyeball. The scraper unit 2 is used to cut the trabecular meshwork and Schlemm's canal wall tissue.

[0039] Preferably, if Figure 1 As shown, the needle 1 is a tubular needle, and the end of the needle 1 is a sharp beveled end so as to pierce the patient's eyeball.

[0040] Preferably, 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, 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. The second section 22 is provided in multiple numbers 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 the first section 21, the second section 22, and the third section 23 out or pull them into the needle 1. The first section 21, the second section 22, and the third section 23 can form a curved hook portion with a groove, and the curved hook portion with a groove is used to hook the trabecular meshwork and the wall tissue of the Schlemm's canal. The curved hook portion with a groove is specifically aimed at the trabecular meshwork and the wall tissue of the Schlemm's canal to hook, and the trauma of the eye incision is minimized.

[0041] Preferably, if Figure 3 As shown, in order to accommodate the cut trabecular meshwork and Schlemm's vessel wall tissue, the radial cross-section of the first section 21 is arc-shaped. The first section 21 includes a section body 211, the radial cross-section of the section body 211 is arc-shaped, and includes a hollow portion, the hollow portion is used to accommodate the cut trabecular meshwork and Schlemm's vessel wall tissue. In order to facilitate the cutting of the trabecular meshwork and Schlemm's vessel wall tissue, one end of the section body 211 is provided with a blade 212, and the outer diameter of the blade 212 is smaller than the outer diameter of the section body 211. In order 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, the first clearance portion 213 is sloped, and the outer diameter of the first clearance portion 213 is smaller than the outer diameter of the section body 211. In order to rotatably connect the first section 21 to the second section 22, the first section 21 also includes a connecting protrusion 214, which is arranged 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 on both sides of the end of the section body 211 with the center of the arc as the midline.

[0042] Preferably, Figure 3 and Figure 4 As shown, the second section 22 includes a small arc segment 221 and a large arc segment 222. The curvature of the small arc segment 221 and the large arc segment 222 is the same as the curvature of the section body 211, and 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. The small arc segment 221 can be socketed with the section body 211.

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

[0044] Preferably, the second section 22 further includes a connecting recess 223, which is provided 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, allowing the first section 21 to 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, allowing the first second section 22 to rotate around the connecting recess 223 of the second second section 22. There are two connecting recesses 223, which are symmetrically provided on the outer walls of both sides of the small arc segment 221 relative to the midline of the large arc segment 222.

[0045] Preferably, to facilitate the retraction of the second section 22 into the needle 1, a first paving portion 213 is provided at the end of the large arc segment 222. The first paving portion 213 is sloped, and its outer diameter is smaller than that of the large arc segment 222. To facilitate the rotation of the first section 21 toward the hollow portion, a second paving portion 224 is provided at the end of the small arc segment 221. The second paving portion 224 is sloped, and its outer diameter is smaller than that of the small arc segment 221.

[0046] Preferably, 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 pit 223 and a second yielding portion 224 .

[0047] Preferably, Figure 2 As shown, in order to bend the scraper unit 2, the scraper unit 2 further includes a pulling wire 25. One end of the pulling wire 25 is connected to the first section 21, and the other end of the pulling wire 25 is a free end. By pulling the free end, the pulling 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 being able to cut the trabecular meshwork and Schlemm's canal wall tissue.

[0048] Preferably, in order to limit the range of movement of the pull wire 25, the scraper unit 2 further includes a limiting ring 26. The limiting ring 26 is provided in plurality and is respectively provided on the side walls of the second section 22 and the third section 23. The pull wire 25 passes through the limiting ring 26, which prevents the pull wire 25 from escaping from the second section 22 and the third section 23, thereby preventing the pull wire 25 from causing damage to the eyeball.

[0049] Preferably, 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 provided in the longitudinal through hole 33. The longitudinal through hole 33 passes through the handle body 31 and is open 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 rod 24 toward the needle 1 and slowly releases the pulling 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 being able to cut the trabecular meshwork and the Schlemm's canal wall tissue.

[0050] Compared to the prior art, the scraper unit 2 is a bendable scraper unit, comprising 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. A plurality of second sections 22 are provided so that the scraper unit 2 can be flexed. The push-pull rod 24 is used to pass through the handle 3 and push the first section 21, the second section 22, and the third section 23 out or pull them into the needle 1. The first section 21, the second section 22, and the third section 23 can form a curved hook with a groove, which is used to hook the trabecular meshwork and the wall tissue of the Schlemm's canal. The curved hook with a groove is specifically aimed at the trabecular meshwork and the wall tissue of the Schlemm's canal, which minimizes the trauma of the eye incision. One end of the pull wire 25 is connected to the first section 21, and the other end of the pull wire 25 is free. By pulling the free end, the pulling wire 25 can pull the first section 21, so that the first section 21, the second section 22 and the third section 23 are bent into a hook shape; the user pushes the push rod 24 toward the needle 1 and slowly releases the pulling 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, the first section 21, the second section 22 and the third section 23 are bent into a hook with a groove, so that the trabecular meshwork and the Schlemm's canal wall tissue can be cut.

[0051] Example 2:

[0052] In order to limit the length and bending direction of the scraper unit 2 extending into the eyeball, as shown in FIG. Figure 2As shown, based on Example 1, this embodiment improves the scraper unit 2 and the handle 3. The scraper unit 2 adds a circumferential groove 27 and an axial groove 28, and the handle 3 adds 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, limit the bending direction of the scraper unit 2 and the length of the scraper unit 2 extending into the eyeball, prevent the scraper unit 2 from extending into the eyeball too long and bending in the wrong direction, and avoid 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 limit component groove and an end cover (not shown in the figure). The end cover can be connected to the handle body 31. The limit component groove is set on the handle body 31. The limit component is set in the limit component groove. The end cover is used to close the limit component groove to prevent the limit component from axially disengaging from the limit component groove.

[0055] Preferably, the limit assembly includes a limiter 34 and a spring 35. The limiter 34 is disposed on the limiter assembly groove, one end of the spring 35 is connected to the limiter 34, and the other end of the spring 35 is connected to the limiter assembly groove. The limiter 34 is used to insert into the circumferential groove 27 to prevent the push-pull rod 24 from axial movement. The spring 35 is used to radially push the limiter 34 away from the longitudinal through hole 33 so that the limiter 34 can be inserted into the circumferential groove 27, thereby preventing the scraper unit 2 from extending too far into the eyeball and causing damage to the eyeball. Exemplarily, the limiter 34 is a limit ring that can be sleeved with the push-pull rod 24 to prevent the limiter 34 from detaching from the push-pull rod 24.

[0056] Preferably, the limiting assembly also includes a limiting protrusion 36, which is arranged 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 limit assembly further includes a release lever 37, which is disposed on the outer wall of the limit member 34 and passes through the limit assembly slot. The release lever 37 is used to release the push-pull rod 24. By pressing the release lever 37 in the direction of the spring 35, the limit member 34 can be disengaged from the circumferential groove 27, and the push-pull rod 24 can then slide along the longitudinal through hole 33.

[0058] Compared with Example 1, the limit member 34 is used to be inserted into the circumferential groove 27 to prevent the push-pull rod 24 from axial movement, and the spring 35 is used to radially push the limit member 34 so that the limit member 34 is away from the longitudinal through hole 33, so that the limit member 34 can be inserted into the circumferential groove 27 to prevent the scraper unit 2 from extending into the eyeball too long, thereby avoiding damage to the eyeball; the limit 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 circumferential rotation, thereby preventing the scraper unit 2 from bending in the wrong direction to avoid damage to the eyeball.

[0059] Example 3:

[0060] In Example 1, the user needs to push the push-pull rod 24 toward the needle 1 and slowly release the pulling wire 25 at the same time to be able to push the first section 21, the second section 22 and the third section 23 out of the needle 1 and make the first section 21 bend. The release action of the pulling wire 25 needs to take into account both the release and the pulling, which is cumbersome. Figure 1 As shown, based on Example 1 or 2, Example 3 adds a pulling unit 4 to the handle 3. The pulling unit 4 is used to provide axial traction for the pulling wire 25 when releasing the pulling wire 25. The user does not need to consider the action of releasing the wire and pulling the pulling wire 25. The user only needs to push the push-pull rod 24 in the direction of the needle 1. The operation is simple, reduces the user's workload, and saves operation time.

[0061] Specifically, such as Figure 8 As shown, the pulling unit 4 includes a winding wheel 41, a rotating shaft pin 42 and a coil spring 43. The rotating shaft pin 42 is a T-shaped pin. The end of the small diameter section of the rotating shaft pin 42 is connected to the handle body 31. The winding wheel 41 is sleeved on the small diameter section of the rotating shaft pin 42, and the winding wheel 41 sleeve can rotate around the rotating shaft pin 42. The large diameter section of the rotating shaft pin 42 is used to prevent the winding wheel 41 from escaping from the rotating shaft pin 42. The free end of the pulling line 25 can be wound on the winding wheel 41, and the winding wheel 41 is used to store the pulling line 25. One end of the coil spring 43 is connected to the rotating shaft pin 42, and the other end of the coil spring 43 is connected to the winding wheel 41. The coil spring 43 is used to form resistance when the winding wheel 41 pays out the line, so that the pulling line 25 remains taut.

[0062] The user pushes the push-pull rod 24 toward the needle 1, whereupon the pulling wire 25 is pulled by the first section 21, and the elastic force of the coil spring 43 hinders the rotation of the winding wheel 41 and keeps the pulling wire 25 taut; after the force of pushing the push-pull rod 24 is greater than the elastic force 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, and the winding wheel 41 rotates, keeping the pulling wire 25 taut and releasing the pulling wire 25.

[0063] Compared with Example 1 or 2, the coil spring 43 is used to form resistance when the winding wheel 41 pays out the line, so that the pulling line 25 remains taut; the user does not need to consider the pay-out action of paying out the line and pulling the pulling line 25, but only needs to push the push-pull rod 24 toward the needle 1. The operation is simple, reduces the user's workload, and saves operation time.

[0064] Example 4:

[0065] In the embodiment 1, 2 or 3, the first section 21, the second section 22 and the third section 23 are bent into a grooved hook, and the trabecular meshwork and the wall tissue of the Schlemm's canal are cut off as the entire sheet of tissue swept by the hook, which causes great damage to the patient's eyes. Figure 1 and Figure 9 As shown, Example 4 is based on Example 1, 2 or 3, with the addition of a drill pipe unit 5, 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 under the guidance of the first section 21, the second section 22 and the third section 23, directionally drill the trabecular meshwork and Schlemm's canal wall tissue, and completely remove the drilled trabecular meshwork and Schlemm's canal wall tissue out of the eyeball.

[0066] Specifically, such as Figure 10 and Figure 11 As shown, the drill tube unit 5 includes a drill tube 51, a flexible, flexible tube with a stiffness greater than that of ocular tissue. One end of the drill tube 51 is a drill blade, and the other is a free end. The user inserts the drill tube 51 into the push-pull rod 24 and pushes it toward the first section 21. The drill tube 51 slides along the grooved hook formed by the bending of the first, second, and third sections 21, 22, and 23, drilling into the trabecular meshwork and Schlemm's canal wall tissue.

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

[0068] Preferably, in order to completely remove the drilled trabecular meshwork and Schlemm's canal wall tissue from the eyeball, the drill pipe unit 5 also includes a blocking plate groove and a blocking plate 52. The blocking plate groove is provided on the inner wall of the drill pipe 51, and the blocking plate 52 is provided in the blocking plate groove. The blocking plate 52 is hinged to the blocking plate groove by a pin 53, and the blocking 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 the 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°. A cutting edge is provided at the end of the warped portion 522, which is located outside the sealing plate slot and inside the drill pipe 51. After the drill tube 51 drills through the trabecular meshwork and Schlemm's canal wall tissue, the tissue inside the drill tube 51 remains connected to the eyeball at the drill tube's blade. When the user removes the drill tube 51 from the scraper unit 2, the drill tube 51 and the tissue inside it move relative to each other, allowing the cutting edge of the curved portion 522 to penetrate the tissue inside the drill tube 51 and causing the plate body 521 to rotate toward the drill tube's blade. As the drill tube 51 continues to move, the plate body 521 penetrates the tissue inside the drill tube 51, and the sealing plate 52 completely severs the trabecular meshwork and Schlemm's canal wall tissue inside the drill tube 51. The remaining trabecular meshwork and Schlemm's canal 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 specific 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 thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A pathological biopsy needle for trabecular meshwork tissue of the eye, characterized in that: The invention comprises a needle (1), a scraper unit (2) and a handle (3); the needle (1) is connected to the handle (3); the scraper unit (2) is arranged in the needle (1); the handle (3) is used for being held by a user; the needle (1) is used for piercing the patient's eyeball; and the scraper unit (2) is used for cutting the trabecular meshwork and Schlemm's canal wall tissue.

2. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 1, characterized in that: The needle (1) is a tubular needle.

3. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 1, characterized in that: The end of the needle (1) is a sharp bevel.

4. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 1, characterized in that: The scraper unit (2) comprises a first section (21), a second section (22) and a third section (23), and the first section (21), the second section (22) and the third section (23) are rotatably connected in sequence.

5. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 4, characterized in that: The scraper unit (2) further comprises a push-pull rod (24), and the third section (23) is fixedly connected to the push-pull rod (24).

6. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 4, characterized in that: The second section (22) is provided in plural.

7. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 4, characterized in that: The radial cross section of the first section (21) is arc-shaped.

8. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 7, characterized in that: The first section (21) comprises a section body (211), the radial cross section of the section body (211) is arc-shaped, and the hollow portion of the section body (211) is used to accommodate the cut trabecular meshwork and Schlemm's canal wall tissue.

9. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 8, characterized in that: One end of the joint body (211) is provided with a blade portion (212), and the outer diameter of the blade portion (212) is smaller than the outer diameter of the joint body (211).

10. The pathological biopsy needle for eye trabecular meshwork tissue according to claim 9, characterized in that: The second section (22) comprises a small arc segment (221) and a large arc segment (222); the curvature of the small arc segment (221) and the large arc segment (222) is the same as that of 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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