Tissue scraper

Abstract

The invention provides a tissue scraper. The tissue scraper comprises a flexible curette blade, a fixed rod, a driving rod and a handle, the two ends of the fixing rod are the third end and the fourth end respectively, and the third end is fixedly connected to the first end of the curette blade. The two ends of the driving rod are the fifth end and the sixth end respectively, the fifth end is fixedly connected to the second end of the curette blade, and the driving rod is in relative sliding connection with the fixing rod; the handle is fixedly connected to the sixth end of the driving rod and the fourth end of the fixing rod and used for driving the driving rod to slide relative to the fixing rod so as to change the shape of the curette blade. According to the tissue scraper, the driving rod is controlled by the handle to move relative to the fixed rod so as to drive the curette blade to change the shape and the size, tissue scrapers with curette blades of different sizes do not need to be replaced, the operation amount of the tissue scrapers needing to be disinfected and sterilized before an operation is reduced, and doctors do not need to frequently replace the tissue scrapers in the operation process; and the use efficiency of the tissue scraper is improved.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a tissue scraper. Background Art

[0002] A tissue scraper is a medical tool mainly used in orthopedic surgery. It includes an operating handle and a curette. During the operation, the doctor controls the curette through the operating handle to scrape bone tissue or soft tissue. Different tissue scrapers have curettes of different sizes for different surgical needs. During the operation, the doctor selects tissue scrapers with curettes of different sizes according to the patient's lesion severity and operating space. Before the operation, tissue scrapers with curettes of various sizes need to be sterilized at high temperature and high pressure, which increases the sterilization workload. During the operation, the doctor needs to choose different tissue scrapers according to different occasions. The replacement process is complicated and not conducive to operation.

[0003] In order to solve the problem that a tissue scraper with different sizes of curettes has a large workload for disinfection and sterilization and is troublesome to replace during surgery, the present invention provides a tissue scraper. Summary of the invention

[0004] The object of the present invention is to provide a tissue scraper having the advantage that the size of the scraper can be adjusted.

[0005] To achieve the above object, the present invention provides a tissue scraper, comprising:

[0006] A flexible scraper blade, wherein two ends of the scraper blade are respectively a first end and a second end;

[0007] A fixed rod, whose two ends are respectively a third end and a fourth end, wherein the third end is fixedly connected to the first end of the scraper blade;

[0008] A driving rod, whose two ends are respectively a fifth end and a sixth end, the fifth end is fixedly connected to the second end of the scraper blade, and the driving rod is relatively slidably connected to the fixed rod;

[0009] A handle is fixedly connected to the sixth end of the driving rod and movably connected to the fourth end of the fixed rod, and the handle is used to drive the driving rod to slide relative to the fixed rod to change the relative positions of the scraper blade, the fixed rod and the driving rod.

[0010] Optionally, the fixing rod has a hollow portion inside, and the driving rod passes through the hollow portion of the fixing rod.

[0011] Optionally, the tissue scraper further comprises a rotation adjustment portion, the rotation adjustment portion is provided with a threaded hole, the handle is provided with a threaded portion with external threads, the threaded hole on the rotation adjustment portion matches the threaded portion on the handle, and the rotation adjustment portion is sleeved on the fixing rod.

[0012] Optionally, the sixth end of the driving rod is provided with a hook which forms an angle with the axis of the driving rod, and the handle is provided with a connecting hole, and the hook is engaged with the connecting hole.

[0013] Optionally, a first avoidance groove is provided on the handle, the direction of the first avoidance groove is parallel to the moving direction of the driving rod, the width of the first avoidance groove is greater than the width of the curved hook, and the curved hook is arranged in the first avoidance groove.

[0014] Optionally, a second avoidance groove is provided on the fixing rod, the second avoidance groove is parallel to the first avoidance groove, the width of the second avoidance groove is greater than the width of the curved hook, and the curved hook is arranged in the first avoidance groove.

[0015] Optionally, the tissue scraper further comprises a rotating sleeve, wherein the rotating sleeve is fixedly sleeved on the fixed rod, and the rotation adjustment portion is sleeved on the rotating sleeve.

[0016] Optionally, the tissue scraper further comprises a retaining ring, a slot is provided on the fixing rod, the slot is close to a side of the rotating sleeve away from the handle, the retaining ring is embedded in the slot, and the rotating sleeve abuts against the retaining ring.

[0017] Optionally, the flexible scraper blade may be variable in shape, and the shape between the first end and the second end of the scraper blade may be circular, triangular, square, diamond, or other ring-like shapes.

[0018] Optionally, the material of the scraper blade includes at least one of flexible stainless steel, medical memory alloy or polymer material.

[0019] In summary, compared with the prior art, the tissue scraper provided by the present invention has the following beneficial effects:

[0020] The tissue scraper of the present invention is provided with a relatively movable fixed rod and a driving rod, and the handle controls the driving rod to move relative to the fixed rod to drive the flexible scraper blade to move, thereby changing its shape and size; the tissue scraper is suitable for the needs of different scenarios, and there is no need to replace tissue scrapers with scraper blades of different sizes, which reduces the number of tissue scrapers that need to be disinfected and sterilized before surgery. During the operation, the doctor does not need to frequently replace the tissue scraper, thereby improving the use efficiency of the tissue scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall structural diagram of the tissue scraper of the present invention.

[0022] Figure 2 It is a schematic diagram of the exploded parts of the tissue scraper of the present invention.

[0023] Figure 3 It is a structural diagram of the fixing rod of the tissue scraper of the present invention.

[0024] Figure 4 It is a structural diagram of the handle of the tissue scraper of the present invention.

[0025] Figure 5 for Figure 5 Cross-sectional view along the AA direction.

[0026] Figure 6 It is a structural diagram of a tissue scraper blade of the present invention.

[0027] Description of reference numerals:

[0028] Tissue scraper 10

[0029] Curette Blade 110

[0030] First End 111

[0031] Second end 112

[0032] Fixed rod 120

[0033] The third end 121

[0034] Fourth End 122

[0035] Second avoidance slot 123

[0036] Driving rod 130

[0037] Fifth end 131

[0038] The sixth end 132

[0039] Hook 133

[0040] Handle 140

[0041] Threaded portion 141

[0042] Connection hole 142

[0043] First avoidance groove 143

[0044] Rotation adjustment unit 150

[0045] Rotating sleeve 160

[0046] Retaining ring 170 DETAILED DESCRIPTION

[0047] The following will be combined with the attached embodiment of the present invention Figure 1 ~Attached Figure 6 , the technical solutions, structural features, objectives achieved and effects in the embodiments of the present invention are described in detail.

[0048] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0049] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] like Figure 1 and Figure 2 As shown, the present invention provides a tissue scraper 10 , which includes a flexible curette blade 110 , a fixing rod 120 , a driving rod 130 and a handle 140 .

[0051] The tissue scraper 10 plays an important role in the surgical process and is used to perform delicate and precise scraping operations on various human tissues. The tissue scraper 10 can be used to scrape human tissues including hard bone tissue, meniscus, and cartilage on the surface of joints. In addition, it can also be used to scrape ligaments connecting bones; at the same time, it also includes the hose ring (labrum) at the edge of the hip joint and the labrum (labrum) of the shoulder joint. In addition, in the field of oral medicine, the tissue scraper can also be used to scrape dental calculus.

[0052] The flexible scraper blade 110 is in sheet shape, and its two ends are a first end 111 and a second end 112, which are respectively connected to the fixing rod 120 and the driving rod 130. The shape and size of the scraper blade 110 can be changed by changing the relative position between the first end 111 and the second end 112.

[0053] The two ends of the fixed rod 120 are respectively a third end 121 and a fourth end 122. The third end 121 is fixedly connected to the first end 111 of the scraper blade 110, and an open groove is provided on the third end 121 of the fixed rod 120 for mounting the first end 111 of the scraper blade 110. The open groove design on the fixed rod 120 enables a detachable connection between the fixed rod 120 and the scraper blade 110. When the scraper blade 110 needs to be replaced due to aging, the scraper blade 110 can be removed from the fixed rod 120 to replace the scraper blade 110, thereby avoiding the need to replace the tissue scraper 10 as a whole simply because the scraper blade 110 has reached the end of its service life.

[0054] The tissue scraper 10 further includes a driving rod 130 and a handle 140. The handle 140 is connected to the driving rod 130 and the fixed rod 120, respectively, and the driving rod 130 and the fixed rod 120 are relatively slidably connected. The two ends of the driving rod 130 are respectively a fifth end 131 and a sixth end 132, and the fifth end 131 is fixedly connected to the second end 112 of the scraper blade 110. The two ends of the scraper blade 110 are respectively connected to the driving rod 130 and the fixed rod 120, and the driving rod 130 slides relative to the fixed rod 120 to change the shape of the scraper blade 110.

[0055] Specifically, the handle 140 is fixedly connected to the sixth end 132 of the driving rod 130, and the handle 140 is movably connected to the fourth end 122 of the fixed rod 120. During operation, the handle 140 drives the driving rod 130 to slide relative to the fixed rod 120 to change the relative positions of the scraper blade 110, the fixed rod 120, and the driving rod 130, and finally changes the size and shape of the scraper blade 110 exposed outside the fixed rod 120.

[0056] like Figure 2 and Figure 3 As shown, the fixed rod 120 has a hollow portion inside. In this embodiment, the hollow portion is a circular through hole provided in the fixed rod 120 for the driving rod 130 to pass through. The driving rod 130 is provided in the hollow portion of the fixed rod 120. With such a configuration, during the operation, when the curette blade 110 is moved closer to the operating part through the fixed rod 120, since the driving rod 130 is completely provided inside the fixed rod 120, it is only necessary to consider whether the shape of the fixed rod 120 will interfere with other parts of the patient's body, and it is not necessary to consider the interference of other parts of the patient on the moving path of the driving rod 130.

[0057] Continue as Figure 2As shown, the tissue scraper 10 further includes a rotation adjustment portion 150. The rotation adjustment portion 150 is sleeved on the fixed rod 120 and cooperates with the handle 140. By relatively rotating the handle 140 and the rotation adjustment portion 150, the relative positions of the handle 140 and the rotation adjustment portion 150 are changed, and then the relative position between the fixed rod 120 and the driving rod 130 is changed to change the shape of the scraper blade 110. In this embodiment, the rotation adjustment portion 150 is provided with a threaded hole, the inner wall of the threaded hole is provided with a thread and is a through hole; the handle 140 is provided with a threaded portion 141 with an external thread, and the threaded hole on the rotation adjustment portion 150 matches the threaded portion 141 on the handle 140. During use of the tissue scraper 10, the rotation adjustment portion 150 is connected to the handle 140 via a thread. By rotating the handle 140 or the rotation adjustment portion 150, the handle 140 can move relative to the rotation adjustment portion 150 along the thread axis. The handle 140 and the drive rod 130 are fixedly connected, so that the drive rod 130 can move relative to the fixed rod 120 along the thread axis, thereby changing the shape of the scraper blade 110.

[0058] The rotation adjustment part 150 and the handle 140 are connected via a threaded pair, and the relative position between the fixing rod 120 and the driving rod 130 can be precisely adjusted as needed during rotation, thereby achieving accurate adjustment of the shape of the scraper blade 110 .

[0059] In other embodiments, a sliding groove and a sliding block may be respectively provided on the handle 140 and the fixing rod 120 , so that the handle 140 drives the driving rod 130 to move relative to the fixing rod 120 .

[0060] The sixth end 132 of the driving rod 130 is provided with a hook 133 which forms an angle with the axis of the driving rod 130 , and the hook 133 is used to be hung on the handle 140 so as to achieve a detachable connection with the handle 140 . Figure 4 As shown, a connection hole 142 is provided on the handle 140, and the hook 133 is inserted into the connection hole 142. When the handle 140 and the driving rod 130 need to be connected, the hook 133 is hung in the connection hole 142 to achieve the matching connection between the handle 140 and the driving rod 130, so as to achieve the relative positioning between the handle 140 and the driving rod 130 along the axis direction of the driving rod 130.

[0061] like Figure 4 and Figure 5 As shown, the handle 140 is provided with a first avoidance groove 143, and the direction of the first avoidance groove 143 is parallel to the moving direction of the driving rod 130. The width of the first avoidance groove 143 is greater than the width of the hook 133, and the hook 133 is arranged in the first avoidance groove 143. The first avoidance groove 143 limits the hook 133, so that the driving rod 130 cannot rotate relative to the handle 140, and the driving rod 130 is limited to linear motion relative to the handle 140.

[0062] like Figure 3 As shown, a second avoidance groove 123 is provided at the fourth end 122 of the fixed rod 120, the second avoidance groove 123 is parallel to the first avoidance groove 143, and the width of the second avoidance groove 123 is greater than the width of the hook 133. The hook 133 is provided in the first avoidance groove 143, so that the driving rod 130 cannot rotate relative to the fixed rod 120, and the driving rod 130 is limited to linear motion relative to the fixed rod 120.

[0063] The tissue scraper 10 further includes a rotating sleeve 160, which is fixedly sleeved on the fixed rod 120. The rotation adjustment portion 150 is sleeved on the rotating sleeve 160, and the rotation adjustment portion 150 rotates on the rotating sleeve 160. The rotating sleeve 160 is provided with a raised ring, which contacts the rotating adjustment portion 150, thereby reducing the contact area between the rotating sleeve 160 and the rotating adjustment portion 150 and reducing the resistance to the rotation of the rotating adjustment portion 150.

[0064] The tissue scraper 10 further includes a retaining ring 170. A slot is provided on the fixed rod 120, the slot being close to the side of the rotating sleeve 160 away from the handle 140, the retaining ring 170 is embedded in the slot, and the rotating sleeve 160 abuts against the retaining ring 170. The retaining ring 170 is used to achieve axial positioning of the rotating adjustment part 150 and the fixed rod 120, and to prevent the rotating adjustment part 150 from axially moving relative to the fixed rod 120.

[0065] like Figure 6 As shown, the flexible scraper blade 110 has a variable shape. The scraper blade 110 is used to clean the bone surface during surgery to remove unwanted soft tissue, bone scraps or other impurities. The shape of the scraper blade 110 can be changed by changing the relative position between the first end 111 and the second end 112 at both ends of the scraper blade 110. The shape between the first end 111 and the second end 112 of the scraper blade 110 can be circular, triangular, square, diamond and other ring-shaped shapes.

[0066] The material of the scraper blade 110 can be selected from one or more of flexible stainless steel, medical memory alloy or polymer material. Flexible stainless steel can be bent, twisted or folded to a certain extent, and can adapt to application scenarios with different shapes and space requirements; medical memory alloys include nickel-titanium alloys or copper-based memory alloys; medical memory alloys can return to a preset shape under specific conditions (such as temperature changes), and medical memory alloys have good biocompatibility and have no obvious irritation and toxicity to human tissues.

[0067] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A tissue scraper, characterized in that: The tissue scraper comprises: A flexible scraper blade, wherein two ends of the scraper blade are respectively a first end and a second end; A fixed rod, whose two ends are respectively a third end and a fourth end, wherein the third end is fixedly connected to the first end of the scraper blade; A driving rod, whose two ends are respectively a fifth end and a sixth end, the fifth end is fixedly connected to the second end of the scraper blade, and the driving rod is relatively slidably connected to the fixed rod; A handle is fixedly connected to the sixth end of the driving rod and movably connected to the fourth end of the fixed rod, and the handle is used to drive the driving rod to slide relative to the fixed rod to change the relative positions of the scraper blade, the fixed rod and the driving rod.

2. The tissue scraper according to claim 1, characterized in that: The fixing rod has a hollow portion inside, and the driving rod passes through the hollow portion of the fixing rod.

3. The tissue scraper according to claim 1, characterized in that: The tissue scraper also includes a rotation adjustment part, which is provided with a threaded hole. The handle is provided with a threaded part with external threads. The threaded hole on the rotation adjustment part matches the threaded part on the handle, and the rotation adjustment part is sleeved on the fixing rod.

4. The tissue scraper according to claim 1 or 3, characterized in that: The sixth end of the driving rod is provided with a hook which forms an angle with the axis of the driving rod, and the handle is provided with a connecting hole, and the hook is engaged with the connecting hole.

5. The tissue scraper according to claim 4, characterized in that: The handle is provided with a first avoidance groove, the direction of the first avoidance groove is parallel to the moving direction of the driving rod, the width of the first avoidance groove is greater than the width of the curved hook, and the curved hook is arranged in the first avoidance groove.

6. The tissue scraper according to claim 5, characterized in that: The fixing rod is provided with a second avoidance groove, the second avoidance groove is parallel to the first avoidance groove, the width of the second avoidance groove is greater than the width of the curved hook, and the curved hook is arranged in the first avoidance groove.

7. The tissue scraper according to claim 3, characterized in that: The tissue scraper further comprises a rotating sleeve, wherein the rotating sleeve is fixedly sleeved on the fixing rod, and the rotation adjusting portion is sleeved on the rotating sleeve.

8. The tissue scraper according to claim 7, characterized in that: The tissue scraper also includes a retaining ring. A slot is provided on the fixing rod. The slot is close to a side of the rotating sleeve away from the handle. The retaining ring is embedded in the slot, and the rotating sleeve abuts against the retaining ring.

9. The tissue scraper according to claim 1, characterized in that: The flexible scraper blade has a variable shape, and the shape between the first end and the second end of the scraper blade can be circular, triangular, square, diamond or other ring-like shapes.

10. The tissue scraper according to claim 1, characterized in that: The material of the scraper blade includes at least one of flexible stainless steel, medical memory alloy or polymer material.

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