A skin biopsy punch

Abstract

The utility model relates to medical instrument technical field, concretely relates to a skin biopsy material taking device, including the hollow cylinder and the annular blade of setting at the front end of cylinder, be equipped with push rod in the cylinder, the annular blade is installed in one end of push rod, the scale line is set up on the rear end outer wall surface of cylinder, the rear end of cylinder still is equipped with the adjusting assembly of drive push rod and move along the axial movement of cylinder, be equipped with the guide assembly between push rod and cylinder, the other end of push rod is equipped with the push -board, and the spring is equipped with below the push -board on push rod, one end of adjusting assembly abuts on push -board, the utility model discloses the annular blade can carry out the adjustment of the length of exposure, thereby make medical staff can according to the actual situation of patient fast selection suitable material taking depth, to improve the adaptability of the skin biopsy material taking device to different patients, satisfy the skin biopsy material taking need on clinic.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a skin biopsy sampling device. Background Technology

[0002] Skin biopsy and skin biopsy pathological examination play a crucial role in the diagnosis and treatment of dermatological diseases, serving as a leading factor in diagnosis, treatment, prognosis assessment, and understanding disease pathogenesis. Currently, the most commonly used method in clinical practice is the trephine technique. It is minimally invasive and allows for a certain depth of incision, making it particularly suitable for small, early-stage lesions, lesions confined to superficial areas, or cases where surgical incision is difficult. A commonly used tool for the trephine technique is a drill bit with a circular trephine at the tip. The specific procedure is as follows: 1. Routinely disinfect the skin and perform local anesthesia, then collect the sample a few minutes later; 2. Select a trephine of appropriate diameter, stabilize the skin with the left hand, and use the right hand to rotate the drill bit at the sampling site while applying downward force, drilling to the appropriate depth. After the trephine cuts the skin tissue, remove the drill bit, lift the specimen by the edge with forceps, and cut the specimen from the bottom with surgical scissors; 3. Immediately place the specimen in a formalin vial, label it, and send it for pathological examination.

[0003] Due to differences in the types of diseases and individual physical conditions among patients, the depth of lesions in the skin varies. Currently, to avoid cross-infection during biopsies, most hospitals use disposable drills to obtain skin tissue samples. However, these disposable drills lack graduations, and because the exposed length of the trephine is mostly fixed across different models and specifications, the sampling depth cannot be adjusted. On the one hand, for larger lesions, insufficient sampling depth can lead to sampling failure, preventing the acquisition of enough tissue for pathological diagnosis. On the other hand, it can cause significant trauma to patients with milder conditions, affecting their recovery efficiency. Therefore, existing neutral drills, due to their fixed trephine exposed length, have certain drawbacks in clinical use. They cannot be adjusted to meet the specific needs of medical personnel, greatly reducing their suitability for patients with different conditions when performing trephine cutting during the sampling process. In view of this, we propose a new skin biopsy sampling device to solve the problems of existing technologies. Summary of the Invention

[0004] To address the problem that existing disposable drills, due to their fixed exposed length, cannot adjust the sampling depth according to the specific needs of medical personnel, resulting in significantly reduced adaptability to different patients during skin cutting, this invention proposes a skin biopsy sampling device. The device features an adjustable annular blade at its front end, allowing medical personnel to quickly select the appropriate sampling depth based on the patient's condition, thereby improving the device's adaptability to different patients.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A skin biopsy sampling device includes a hollow cylindrical body and an annular blade disposed at the front end of the cylindrical body. A push rod is inserted through the cylindrical body, and the annular blade is mounted on one end of the push rod. Scale lines are provided on the outer wall of the rear end of the cylindrical body. An adjustment assembly is also provided at the rear end of the cylindrical body to drive the push rod to move axially along the cylindrical body. A guide assembly is provided between the push rod and the cylindrical body. A push plate is provided at the other end of the push rod, and a spring is sleeved on the push rod and below the push plate. One end of the adjustment assembly abuts against the push plate. The adjustment assembly drives the push rod to move axially along the cylindrical body. On one hand, the adjustment assembly drives the push rod to move the annular blade downwards; on the other hand, the adjustment assembly drives the push rod to retract the annular blade upwards, thereby adjusting the exposed length of the annular blade. When the push rod retracts the annular blade upwards, the spring pushes the push plate upwards to ensure that the push rod smoothly retracts the annular blade.

[0006] Furthermore, the adjustment component includes a knob, one end of which is an open end. The open end of the knob is fitted onto the cylinder body. An outwardly extending connecting post is provided inside the open end of the knob. The connecting post is threadedly connected to the inner wall of the cylinder body. A guide rod is provided at one end of the connecting post that extends out of the knob. One end of the guide rod abuts against the push plate.

[0007] Furthermore, a limiting plate is provided inside the cylinder, and a through hole is opened in the center of the limiting plate for the push rod to pass through. The two ends of the spring abut against the limiting plate and the push plate respectively.

[0008] Furthermore, the guide assembly includes a plurality of protrusions arranged in a circular array on the push rod. The cylinder body has grooves that match the protrusions. One end of each protrusion is fixed to the outer wall of the push rod, and the other end is located within the groove. The push rod and the cylinder body are movably connected via protrusions and grooves, and the push rod can only move along the axial direction of the cylinder body.

[0009] Furthermore, the front end of the cylinder has anti-slip notches arranged in a ring array, and a protective cap is also fitted onto the front end of the cylinder. The presence of the anti-slip notches increases the friction between the cylinder and the skin. In addition, by setting up the protective cap, the blade of the ring blade is prevented from being bumped or knocked before use.

[0010] Furthermore, the annular blade is threadedly connected to the push rod. The push rod is movably connected to the cylinder via a boss and a groove, and the push rod can only move along the axial direction of the cylinder.

[0011] Furthermore, both the cylinder body and the knob surface have an anti-slip layer. The anti-slip layer increases friction at the point of contact with the hand, thus providing an anti-slip effect.

[0012] The beneficial effects of this utility model through the above technical solution are as follows: This invention, through its rational design, allows for adjustment of the exposed length of the annular blade at the front end of the material feeder. The adjustment component drives the push rod via a threaded transmission. Specifically, when the knob is turned clockwise, the threaded action between the connecting column and the cylinder causes the guide rod to move downwards, closer to the push plate. The guide rod compresses the push rod and further compresses the spring. As the guide rod pushes the push plate and push rod downwards simultaneously, the exposed length of the annular blade increases. Conversely, when the knob is turned counterclockwise, the guide rod moves upwards, away from the push plate. The spring releases its stored energy, pushing the push plate upwards, and the push rod and push plate move upwards simultaneously. This causes the annular blade to retract, shortening its exposed length. Adjusting the exposed length involves turning the knob to the corresponding scale line; the scale line corresponds to the exposed length of the annular blade. The sampling depth is equal to the exposed length of the annular blade. Therefore, by turning the knob to different scale lines, the exposed length of the annular blade can be adjusted. This allows medical personnel to quickly select the appropriate sampling depth based on the patient's actual condition, improving the adaptability of the skin biopsy device to different patients. It is convenient, quick, and saves medical costs, making it highly valuable for widespread application. Attached Figure Description

[0013] Figure 1 This is a perspective view of a skin biopsy sampling device according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a skin biopsy sampling device according to the present invention; Figure 3 This is a cross-sectional view of the cylindrical body of a skin biopsy sampling device according to this utility model; Figure 4 This is a schematic diagram of the push rod in a skin biopsy sampling device according to the present invention; Figure 5 This is a schematic diagram of the knob in a skin biopsy sampling device according to the present invention; Figure 6 This is a schematic diagram of the anti-slip recess at the front end of the cylinder of a skin biopsy sampling device according to this utility model.

[0014] The numbers in the attached diagram are: 1. Cylinder body; 2. Annular blade; 3. Push rod; 4. Scale line; 5. Push plate; 6. Spring; 7. Knob; 8. Connecting post; 9. Guide rod; 10. Limiting plate; 11. Protrusion; 12. Slide groove; 13. Anti-slip notch; 14. Protective cap. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-6As shown, this embodiment provides a skin biopsy sampling device, including a hollow cylinder 1 and an annular blade 2 disposed at the front end of the cylinder 1. A push rod 3 is inserted inside the cylinder 1, and the annular blade 2 is mounted on one end of the push rod 3. A scale line 4 is provided on the outer wall of the rear end of the cylinder 1. An adjustment component for driving the push rod 3 to move axially along the cylinder 1 is also provided at the rear end of the cylinder 1. A guide component is provided between the push rod 3 and the cylinder 1. A push plate 5 is provided at the other end of the push rod 3, and a spring 6 is sleeved on the push rod 3 and below the push plate 5. One end of the adjustment component abuts against the push plate 5.

[0016] With the above-described structure, the adjusting component drives the push rod 3 to move axially along the cylinder 1. On the one hand, the adjusting component drives the push rod 3 to move the annular blade 2 downwards; on the other hand, the adjusting component drives the push rod 3 to move the annular blade 2 upwards, thereby adjusting the exposed length of the annular blade 2, so that medical personnel can quickly select the appropriate sampling depth according to the actual situation of the patient. When the push rod 3 moves the annular blade 2 upwards, the spring 6 releases its stored energy, and the spring 6 pushes the push plate 5 upwards, ensuring that the push rod 3 moves the annular blade 2 smoothly back.

[0017] Please refer to this again. Figure 2 and Figure 5 The adjusting assembly includes a knob 7, one end of which is open and fitted onto the cylinder 1. A connecting post 8 extending outwards is disposed within the open end of the knob 7, and the connecting post 8 is threadedly connected to the inner wall of the cylinder 1. A guide rod 9 is disposed at the end of the connecting post 8 extending beyond the knob 7, and one end of the guide rod 9 abuts against the push plate 5. The adjusting assembly drives the push rod 3 to move via a threaded transmission. Specifically, when the knob 7 is rotated clockwise, due to the threaded action between the connecting post 8 and the cylinder 1, the guide rod 9 moves downwards, closer to the push plate 5, further compressing the spring 6; conversely, when the knob 7 is rotated counterclockwise, the guide rod 9 moves upwards, away from the push plate 5, and the stored energy in the spring 6 is released.

[0018] Furthermore, a limiting plate 10 is provided inside the cylinder 1. The limiting plate 10 has a through hole at its center for the push rod 3 to pass through. The two ends of the spring 6 abut against the limiting plate 10 and the push plate 5, respectively. The spring 6 is in a compressed state after assembly, and its elasticity facilitates the retraction of the push rod 3 and the annular blade 2. Specifically, when the guide rod 9 moves away from the push plate 5, the spring 6 pushes the push plate 5 upwards, and the push rod 3 moves synchronously with the push plate 5, thereby causing the annular blade 2 to retract.

[0019] Please refer to this again. Figure 3 and Figure 4The guide assembly includes a plurality of protrusions 11 arranged in a ring array on the push rod 3. The cylinder 1 has grooves 12 that match the protrusions 11. One end of each protrusion 11 is fixed to the outer wall of the push rod 3, and the other end is located within the groove 12. The push rod 3 and the cylinder 1 are movably connected via a boss and a groove. The push rod 3 can only move along the axial direction of the cylinder 1, ensuring that the push rod 3 rotates synchronously when the cylinder 1 is rotated, thereby causing the annular blade 2 to rotate and cut the skin tissue.

[0020] Please refer to this again. Figure 6 The front end of the cylinder 1 has anti-slip recesses 13 arranged in a ring array, and a protective cap 14 is also fitted onto the front end of the cylinder 1. The presence of the anti-slip recesses 13 increases the friction between the cylinder 1 and the skin, effectively preventing the cylinder 1 from slipping off the skin surface. In addition, by setting the protective cap 14, the annular blade 2 is located inside the protective cap 14, avoiding damage to the blade of the annular blade 2 before use. The protective cap 14 can be removed when in use.

[0021] In this embodiment, the annular blade 2 is threadedly connected to the push rod 3, facilitating the disassembly and replacement of the annular blade 2.

[0022] In addition, both the cylinder 1 and the knob 7 have an anti-slip layer on their surfaces. The anti-slip layer increases friction in contact with the hand, thus providing an anti-slip effect.

[0023] It is worth mentioning that when the end of knob 7 is aligned with the zero mark of scale line 4, the lower end of the annular blade 2 is aligned with the front end of the cylinder 1. In use, by rotating knob 7 to the corresponding scale line 4, the exposed length of the annular blade 2 is indicated by the scale line 4. For example, rotating knob 7 to scale line 44mm indicates that the exposed length of the annular blade 2 is 4mm, and the material extraction depth is equal to the exposed length of the annular blade 2, which is also 4mm. Therefore, by rotating knob 7 to different scale lines 4, the exposed length of the annular blade 2 can be adjusted, thereby adjusting the material extraction depth.

[0024] The working principle of this utility model is as follows: First, the sampling depth is adjusted, as follows: Please refer to the settings and adjustment components again. Figure 2When the knob 7 is turned clockwise, due to the threaded action between the connecting column 8 and the cylinder 1, the guide rod 9 moves downward, that is, moves closer to the push plate 5, and further compresses the spring 6. When the guide rod 9 pushes the push plate 5 and the push rod 3 to move downward simultaneously, the exposed length of the annular blade 2 increases. Conversely, when the knob 7 is turned counterclockwise, the guide rod 9 moves upward, that is, moves away from the push plate 5. The spring 6 releases its stored energy, and the spring 6 pushes the push plate 5 upward. The push rod 3 moves upward simultaneously with the push plate 5, thereby driving the annular blade 2 to retract, and the exposed length of the annular blade 2 decreases. In the process of adjusting the exposed length of the annular blade 2, by turning the knob 7 to the corresponding scale line 4, the scale line 4 corresponds to the exposed length of the annular blade 2. The material extraction depth is equal to the exposed length of the annular blade 2. Therefore, by turning the knob 7 to different scale lines 4, the exposed length of the annular blade 2 can be adjusted, thereby achieving the adjustment of the material extraction depth.

[0025] The skin sampling process is as follows: Medical staff hold the tube 1 perpendicular to the skin tissue surface, rotate the tube 1 while pressing down on the ring blade 2. The ring blade 2 drills to the pre-set sampling depth. After the ring blade 2 cuts the skin tissue, the sampler is removed. The sample is lifted by the edge of the sample with tweezers and cut off from the bottom with surgical scissors to complete the skin tissue sampling.

[0026] In summary, through reasonable design, this utility model enables the annular blade 2 at the front end of the biopsy device to adjust its exposed length, allowing medical personnel to quickly select the appropriate sampling depth according to the patient's actual condition. This improves the adaptability of the skin biopsy device to different patients, making it convenient, quick, and cost-effective, and thus has significant potential for widespread application.

[0027] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A skin biopsy sampling device, comprising a hollow cylindrical body (1) and an annular blade (2) disposed at the front end of the cylindrical body (1), characterized in that, A push rod (3) is inserted inside the cylinder (1). The annular blade (2) is installed at one end of the push rod (3). A scale line (4) is provided on the outer wall of the rear end of the cylinder (1). An adjustment component for driving the push rod (3) to move along the axial direction of the cylinder (1) is also provided at the rear end of the cylinder (1). A guide component is provided between the push rod (3) and the cylinder (1). A push plate (5) is provided at the other end of the push rod (3). A spring (6) is sleeved on the push rod (3) and below the push plate (5). One end of the adjustment component abuts against the push plate (5).

2. The skin biopsy sampling device according to claim 1, characterized in that, The adjustment assembly includes a knob (7), one end of which is an open end. The open end of the knob (7) is fitted onto the cylinder (1). An outwardly extending connecting post (8) is provided inside the open end of the knob (7). The connecting post (8) is threadedly connected to the inner wall of the cylinder (1). A guide rod (9) is provided at one end of the connecting post (8) extending out of the knob (7). One end of the guide rod (9) abuts against the push plate (5).

3. The skin biopsy sampling device according to claim 1, characterized in that, The cylinder (1) is provided with a limiting plate (10), and the center of the limiting plate (10) has a through hole for the push rod (3) to pass through. The two ends of the spring (6) abut against the limiting plate (10) and the push plate (5) respectively.

4. A skin biopsy sampling device according to claim 1, characterized in that, The guide assembly includes a number of protrusions (11) arranged in a ring array on the push rod (3). The cylinder (1) has a groove (12) that matches the protrusions (11). One end of the protrusion (11) is fixed to the outer wall of the push rod (3), and the other end is located in the groove (12).

5. A skin biopsy sampling device according to claim 1, characterized in that, The front end of the cylinder (1) is provided with anti-slip notches (13) arranged in a ring array, and the front end of the cylinder (1) is also fitted with a protective cap (14).

6. A skin biopsy sampling device according to claim 1, characterized in that, The annular blade (2) is threadedly connected to the push rod (3).

7. A skin biopsy sampling device according to claim 2, characterized in that, Both the cylinder (1) and the knob (7) have anti-slip layers on their surfaces.

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