Nail bed biopsy assembly
By designing a nail bed biopsy component and utilizing the rotary cutting mechanism of the outer cylinder and inner core, minimally invasive nail bed biopsy has been achieved, solving the problems of large trauma and long recovery period in existing technologies, and providing a convenient and minimally invasive biopsy method.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-06-12
Smart Images
Figure CN224344948U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nail bed biopsy technology, and in particular to a nail bed biopsy component. Background Technology
[0002] There are numerous types of nail deformities or diseases, most of which originate from nail bed lesions. The regenerative function of the nail bed depends on its matrix, which can be divided into the proximal regenerating matrix (germinal matrix) and the distal sterile matrix (sterile matrix). Due to various factors, the nail bed may develop various lesions, deformities, and even malignant tumors. Rapid histopathological examination of the tissue is particularly important for accurately guiding disease treatment.
[0003] However, for a long time, nail bed biopsies have required surgical incision of the nail plate, fenestration of the nail bed tissue, or nail avulsion. The postoperative recovery period is long, which has a serious impact on patients' work and life. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a convenient, quick, minimally invasive, and fast-recovery nail bed biopsy component.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A nail bed biopsy assembly includes a main body, the main body comprising:
[0007] The outer cylinder includes an outer cylinder head for inserting into the nail bed, and the side wall of the outer cylinder head has an outer side hole.
[0008] The inner core includes an inner core head, which includes an inner arc surface and an outer arc surface. The edges of the inner arc surface and the outer arc surface are connected to form cutting portions on both sides of the inner and outer arc surfaces. The distance between the edges of the inner and outer arc surfaces gradually decreases from the rear to the front. A tissue-accommodating portion is formed on the inner arc surface.
[0009] The inner core is rotatably disposed inside the outer cylinder, and the head of the inner core is disposed opposite to the head of the outer cylinder. When the inner core rotates relative to the outer cylinder, the cutting part of the inner core head performs rotary cutting on the nail bed through the outer hole, and the cut nail bed tissue is contained in the tissue containing part.
[0010] In a preferred embodiment, the tissue accommodating portion is adapted to be a recessed structure disposed on the inner arc surface of the inner core.
[0011] In a preferred embodiment, the outer cylinder head includes an inner arc surface and an outer arc surface. The edges of the inner arc surface and the outer arc surface are connected. The distance between the two sides of the edges of the inner and outer arc surfaces gradually decreases from the rear to the front, so as to form an outer cylinder tip on the front side of the edges of the inner and outer arc surfaces. An outer hole is provided on the inner arc surface, and the outer hole communicates with the interior of the outer cylinder.
[0012] In a preferred embodiment, the outer cylinder further includes:
[0013] The outer cylinder body, the front side of which is connected to the rear side of the outer cylinder head;
[0014] The outer cylinder crossbar is connected to the side wall on the rear side of the outer cylinder body.
[0015] In a preferred embodiment, the inner core further includes:
[0016] The inner core body has its front side connected to the rear side of the inner core head.
[0017] In a preferred embodiment, the inner core further includes:
[0018] The inner core crossbar is connected to the side wall on the rear side of the inner core body.
[0019] In a preferred embodiment, when the inner core crossbar abuts against the outer cylinder crossbar, the head of the inner core and the head of the outer cylinder are positioned opposite each other.
[0020] As a preferred embodiment, it also includes:
[0021] Needle cap, the main body is housed within the needle cap.
[0022] In a preferred embodiment, the needle cap has a closed end and an open end, the main body is inserted into the needle cap from the open end, the outer cylinder head of the outer cylinder and the inner core head of the inner core face the closed end of the needle cap respectively, and a gap is provided between the outer cylinder head and the closed end when the outer cylinder crossbar abuts against the open end of the needle cap.
[0023] Compared with existing technologies, this technical solution has the following advantages:
[0024] The outer cylinder head is used to penetrate the nail bed, and an outer hole is provided on the side wall of the outer cylinder head for the rotary cutting operation of the inner core head.
[0025] The inner core head is designed with a tissue-accommodating part and a cutting part for the nail bed tissue.
[0026] When the inner core rotates relative to the outer cylinder, the head of the inner core will perform rotary cutting on the nail bed tissue through the outer hole, thereby obtaining a nail bed tissue sample. This design achieves the purpose of nail bed biopsy in minimally invasive surgery. Furthermore, the biopsy method is convenient and quick to use, simple to operate, causes minimal trauma to the patient, and allows for rapid postoperative recovery, significantly avoiding the significant pain experienced by patients during dressing changes after conventional treatment.
[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the main body of the nail bed biopsy assembly described in this utility model;
[0029] Figure 2 This is a perspective view of the main body described in this utility model;
[0030] Figure 3 This is a schematic diagram of the structure of the outer cylinder described in this utility model;
[0031] Figure 4 This is a schematic diagram of the structure of the inner core described in this utility model;
[0032] Figure 5 This is a schematic diagram of the assembly of the main body and needle cap in the nail bed biopsy assembly of this utility model;
[0033] Figure 6 This is a schematic diagram of the structure of the needle cap described in this utility model.
[0034] In the diagram: 100 Main body, 110 Outer cylinder, 111 Outer cylinder head, 111a Inner arc surface of outer cylinder, 111b Outer arc surface of outer cylinder, 111d Outer cylinder tip, 1110 Outer hole, 112 Outer cylinder body, 113 Outer cylinder crossbar, 120 Inner core, 121 Inner core head, 121a Inner arc surface of inner core, 121b Outer arc surface of inner core, 121c Cutting part, 121d Inner core tip, 121e Tissue receiving part, 122 Inner core body, 123 Inner core crossbar, 200 Needle cap, 200a Closed end, 200b Open end. Detailed Implementation
[0035] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.
[0036] like Figure 1 As shown, the nail bed biopsy assembly includes a main body 100, which includes:
[0037] The outer cylinder 110 includes an outer cylinder head 111, which is used to penetrate the nail bed. The side wall of the outer cylinder head 111 has an outer side hole 1110.
[0038] The inner core 120 includes an inner core head 121, which includes an inner core inner arc surface 121a and an inner core outer arc surface 121b. The edges of the inner core inner arc surface 121a and the outer core outer arc surface 121b are connected to form cutting portions 121c on both sides of the inner core inner arc surface 121a and the outer core outer arc surface 121b. The distance between the two sides of the edges of the inner core inner arc surface 121a and the outer core outer arc surface 121b gradually decreases from the rear to the front. A tissue receiving portion 121e is formed on the inner core inner arc surface 121a.
[0039] The inner core 120 is rotatably disposed inside the outer cylinder 110, and the inner core head 121 is disposed opposite to the outer cylinder head 111. When the inner core 120 rotates relative to the outer cylinder 110, the cutting portion 121c of the inner core head 121 performs rotary cutting on the nail bed through the outer hole 1110, and the cut nail bed tissue is contained in the tissue containing portion 121e.
[0040] The outer cylinder head 111 of the outer cylinder 110 extends between the nail bed and the nail plate, penetrating the nail bed. Since the inner core head 121 is positioned opposite the outer cylinder head 111, during the rotation of the inner core 120, the cutting portion 121c of the inner core head 121 can perform rotary cutting of the nail bed through the outer hole 1110, with the cut nail bed tissue being accommodated in the tissue accommodating portion 121e. Rotation continues until the outer arc surface 121b of the inner core is exposed in the outer hole 1110, meaning the tissue accommodating portion 121e is covered by the outer cylinder head 111. At this point, the main body 100 is then pulled out. Because the tissue accommodating portion 121e is covered by the outer cylinder head 111, the nail bed tissue will not detach during the removal of the main body 100, ensuring the smooth progress of the nail bed tissue biopsy.
[0041] like Figure 1 and Figure 3As shown, the outer cylinder 110 includes an outer cylinder head 111 and an outer cylinder body 112. The front side of the outer cylinder body 112 is connected to the rear side of the outer cylinder head 111, and the interior of the outer cylinder body 112 communicates with the outer side hole 1110. The rear side of the outer cylinder body 112 is an opening for the inner core 120 to be inserted into the outer cylinder 110 until the inner core head 121 of the inner core 120 is positioned opposite to the outer side hole 1110. "Opposite" refers to two states: when the inner core head 121 rotates inside the outer cylinder head 111, there are states where the tissue receiving portion 121e is exposed in the outer side hole 1110, and states where the tissue receiving portion 121e is covered by the outer cylinder head 111.
[0042] refer to Figure 3 The outer cylinder head 111 includes an inner arc surface 111a and an outer arc surface 111b. The edges of the inner arc surface 111a and the outer arc surface 111b are connected. The distance between the two sides of the edges of the inner arc surface 111a and the outer arc surface 111b gradually decreases from the rear to the front, so as to form an outer cylinder tip 111d on the front side of the edges of the inner arc surface 111a and the outer arc surface 111b. An outer hole 1110 is provided on the inner arc surface 111a.
[0043] The edges of the inner arc surface 111a and the outer arc surface 111b of the outer cylinder are sharply ground, and the front side of the edges of the inner arc surface 111a and the outer arc surface 111b of the outer cylinder is the tip 111d of the outer cylinder, which is conducive to its penetration into the armor bed.
[0044] Continue to refer to Figure 3 The inner arc surface 111a of the outer cylinder is concave, and the outer arc surface 111b of the outer cylinder is convex. The curvature of the inner arc surface 111a and the outer arc surface 111b of the outer cylinder can be adjusted according to design requirements, which will not be elaborated here.
[0045] like Figures 1 to 3 As shown, the outer cylinder head 111 also includes an outer cylinder crossbar 113, which is connected to the side wall at the rear end of the outer cylinder body 112. The outer cylinder crossbar 113 facilitates the operator's gripping. The outer cylinder crossbar 113 has various shapes and can resemble the tail structure of an injection syringe, for example, the outer cylinder crossbar 113 is elliptical.
[0046] In this embodiment, the outer cylinder 110 may be made of stainless steel, with a length of 60mm, an inner diameter of 1.27mm, and an outer diameter of 1.47mm, meaning the wall thickness of the outer cylinder 110 is 0.2mm. The outer cylinder 110 is not limited to this.
[0047] like Figure 1 and4 As shown, the outer diameter of the inner core 120 is approximately equal to the inner diameter of the outer cylinder 110, so as to enable the inner core 120 to rotate stably inside the outer cylinder 110.
[0048] The shape of the inner core head 121 is approximately the same as that of the outer cylinder head 111. The design of both needs to satisfy the condition that the inner core head 121 can rotate within the outer cylinder head 111, resulting in two states: the tissue receiving portion 121e can be exposed in the outer hole 1110, and the tissue receiving portion 121e is covered by the outer cylinder head 111. The rotation angle of the inner core head 121 relative to the outer cylinder head 111 is 180°, which means it can be transformed from one state to the other.
[0049] The tissue receiving portion 121e is exposed in the outer hole 1110, with the inner arc surface 121a of the inner core and the inner arc surface 111a of the outer cylinder facing the same direction, and the outer arc surface 121b of the inner core and the outer arc surface 111b of the outer cylinder facing the same direction. The tissue receiving portion 121e on the inner arc surface 121a of the inner core is exposed in the outer hole 1110, and the inner surface of the outer cylinder head 111 corresponding to the outer arc surface 111b of the outer cylinder is in contact with the outer arc surface 121b of the inner core. In this state, the main body 100 can penetrate the nail bed, so that a portion of the nail bed tissue falls directly into the tissue receiving portion 121e. Then, by rotating the inner core 120, the nail bed tissue falling into the tissue receiving portion 121e can be cut off and retained within the tissue receiving portion 121e.
[0050] With the tissue receiving portion 121e covered by the outer cylinder head 111, the outer arc surface 121b of the inner core is exposed on the outer hole 1110. At this time, the tissue receiving portion 121e containing the nail bed tissue is covered by the inner arc surface 111a of the outer cylinder. Therefore, the main body 100 can be pulled out from the nail bed in this state, effectively preventing the nail bed tissue from detaching.
[0051] refer to Figure 4 The inner core tip 121d is formed on the front edge of the inner core inner arc surface 121a and the inner core outer arc surface 121b. The tissue receiving portion 121e is exposed in the outer hole 1110. The inner surface of the outer cylinder head 111 corresponding to the outer cylinder outer arc surface 111b is in contact with the inner core outer arc surface 121b, and the inner core tip 121d and the outer cylinder tip 111d correspond to each other, that is, the inner core tip 121d and the outer cylinder tip 111d are respectively located on the center line of the main body 100. At this time, the setting of the inner core tip 121d will not affect the rotation of the inner core head 121 in the outer cylinder head 111.
[0052] Continue to refer to Figure 4 The tissue receiving portion 121e is adapted to be a recessed structure provided on the inner arc surface 121a of the inner core.
[0053] like Figure 1 , Figure 2 and Figure 4 As shown, the inner core 120 includes an inner core body 122, the front side of which is connected to the rear side of the inner core head 121, and the inner core body 122 is housed inside the outer cylinder body 112 of the outer cylinder 110.
[0054] The inner core 120 also includes an inner core crossbar 123, which is connected to the side wall of the rear side of the inner core body 122. The inner core crossbar 123 is easy for the operator to grip, so as to drive the inner core 120 to rotate relative to the outer cylinder 110.
[0055] When the inner core crossbar 123 abuts against the outer cylinder crossbar 113, the inner core head 121 and the outer cylinder head 111 are positioned opposite each other. This relative positioning means that when the inner core head 121 rotates inside the outer cylinder head 111, the tissue receiving portion 121e is either exposed in the outer hole 1110 or covered by the outer cylinder head 111. This prevents the operator from further pushing the inner core 120 towards the front of the outer cylinder 110, which could damage the inner core head 121.
[0056] The outer cylinder 110 and the inner core 120 can be matched together by means of slots, strips, etc., so that the two can be used as a whole, while allowing the inner core 120 to rotate within the outer cylinder 100.
[0057] like Figure 5 As shown, the nail bed biopsy assembly further includes:
[0058] The needle cap 200 is provided, and the main body 100 is housed within the needle cap 200. That is, the main body 100 can be housed within the needle cap 200.
[0059] refer to Figure 5 and Figure 4 As shown, the needle cap 200 has a closed end 200a and an open end 200b. The main body 100 is inserted into the needle cap 200 from the open end 200b. The outer cylinder head 111 of the outer cylinder 110 and the inner core head 121 of the inner core 120 face the closed end 200a of the needle cap 200. When the outer cylinder crossbar 113 of the outer cylinder 110 abuts against the open end 200b of the needle cap 200, a gap is provided between the outer cylinder head 111 and the closed end 200a, which can protect the outer cylinder head 111.
[0060] Preferably, the open end 200b of the needle cap 200 can be engaged with the outer cylinder crossbar 113 of the outer cylinder 110 by snapping or screwing. After the connection between the open end 200b and the outer cylinder crossbar 113 is released, the main body 100 can be removed from the needle cap 200.
[0061] The nail bed biopsy component can be used on fingers or toes. Taking fingers as an example, its usage is described as follows:
[0062] Local anesthesia is administered to the finger, and the main body 100 is removed from the needle cap 200;
[0063] The outer cylinder head 111 of the outer cylinder 110 is inserted into the nail bed at an angle of 15 degrees.
[0064] Rotate the inner core 120 inside the outer cylinder 110 so that the inner core head 121 cuts the nail bed, and pull out the main body 100 while the tissue receiving portion 121e is covered by the outer cylinder head 111 to obtain the nail bed tissue to be biopsied.
[0065] Finally, apply pressure bandage to the puncture site of the stent.
[0066] In summary, the outer cylinder head 111 of the outer cylinder 110 is used to insert into the nail bed, and an outer side hole 1110 is provided on the side wall of the outer cylinder head 111 for the rotary cutting operation of the inner core head 121. The inner core head 121 is designed with a tissue receiving part 121e and a cutting part 121c for the nail bed tissue. When the inner core 120 rotates relative to the outer cylinder 110, the inner core head 121 will rotary cut the nail bed tissue through the outer side hole 1110, thereby obtaining a nail bed tissue sample. This design achieves the purpose of nail bed biopsy in minimally invasive surgery. Furthermore, the biopsy method is convenient and quick to use, simple and easy to operate, causes little trauma to the patient, and allows for rapid postoperative recovery, significantly avoiding the great pain experienced by patients during dressing changes after conventional treatment.
[0067] The embodiments described above are only used to illustrate the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The scope of patent application of this utility model should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in this utility model still fall within the patent scope of this utility model.
Claims
1. A nail bed biopsy assembly, characterized in that, Includes a main body (100), said main body (100) comprising: The outer cylinder (110) includes an outer cylinder head (111), which is used to penetrate the nail bed, and the side wall of the outer cylinder head (111) is provided with an outer side hole (1110). The inner core (120) includes an inner core head (121), the inner core head (121) includes an inner core inner arc surface (121a) and an inner core outer arc surface (121b), the edge of the inner core inner arc surface (121a) and the edge of the inner core outer arc surface (121b) are connected to form cutting portions (121c) on both sides of the inner core inner arc surface (121a) and the inner core outer arc surface (121b), the distance between the two sides of the edge of the inner core inner arc surface (121a) and the inner core outer arc surface (121b) gradually decreases from the rear side to the front side, and a tissue receiving portion (121e) is formed on the inner core inner arc surface (121a). The inner core (120) is rotatably disposed inside the outer cylinder (110), and the head of the inner core (121) is disposed opposite to the head of the outer cylinder (111). When the inner core (120) rotates relative to the outer cylinder (110), the cutting part (121c) of the inner core head (121) performs rotary cutting on the nail bed through the outer hole (1110) and accommodates the cut nail bed tissue in the tissue accommodating part (121e).
2. The nail bed biopsy assembly as described in claim 1, characterized in that, The tissue accommodating portion (121e) is adapted to be a recessed structure provided on the inner arc surface (121a) of the inner core.
3. The nail bed biopsy assembly as described in claim 1, characterized in that, The outer cylinder head (111) includes an inner arc surface (111a) and an outer arc surface (111b). The edges of the inner arc surface (111a) and the outer arc surface (111b) are connected. The distance between the two sides of the edges of the inner arc surface (111a) and the outer arc surface (111b) gradually decreases from the rear to the front, so as to form an outer cylinder tip (111d) on the front side of the edges of the inner arc surface (111a) and the outer arc surface (111b). An outer hole (1110) is provided on the inner arc surface (111a), and the outer hole (1110) communicates with the interior of the outer cylinder (110).
4. The nail bed biopsy assembly as described in claim 1, characterized in that, The outer cylinder (110) also includes: The outer cylinder body (112) is connected to the rear side of the outer cylinder head (111) at its front. The outer cylinder crossbar (113) is connected to the side wall on the rear side of the outer cylinder body (112).
5. The nail bed biopsy assembly as described in claim 4, characterized in that, The inner core (120) also includes: The inner core body (122) is connected to the rear side of the inner core head (121) at its front.
6. The nail bed biopsy assembly as described in claim 5, characterized in that, The inner core (120) also includes: The inner core crossbar (123) is connected to the side wall of the rear side of the inner core body (122).
7. The nail bed biopsy assembly as described in claim 6, characterized in that, When the inner core crossbar (123) abuts against the outer cylinder crossbar (113), the inner core head (121) and the outer cylinder head (111) are positioned opposite each other.
8. The nail bed biopsy assembly as described in claim 5, characterized in that, Also includes: Needle cap (200), the body (100) is housed within the needle cap (200).
9. The nail bed biopsy assembly as described in claim 8, characterized in that, The needle cap (200) has a closed end (200a) and an open end (200b). The main body (100) is inserted into the needle cap (200) from the open end (200b). The outer cylinder head (111) of the outer cylinder (110) and the inner core head (121) of the inner core (120) face the closed end (200a) of the needle cap (200) respectively. When the outer cylinder crossbar (113) of the outer cylinder (110) abuts against the open end (200b) of the needle cap (200), a gap is provided between the outer cylinder head (111) and the closed end (200a).