Skin surface sampling device

Abstract

The skin surface sampling device comprises a fixing pipe with an opening in the lower end, a connecting frame is slidably connected to the inner wall of the fixing pipe in a matched mode, electric push rods are installed on the left side and the right side of the upper end of the connecting frame, and a sampling pipe is rotatably connected into the connecting frame in a matched mode; a separation assembly is slidably and rotatably connected between the positions, close to the upper end and the lower end, of the inner wall of the sampling pipe in a matched mode, a groove is formed in the inner edge of the lower end of the sampling pipe in an upward sunken mode, and rotating shafts extending into the groove are rotatably connected to the left side and the right side of the upper end of the outer wall of the sampling pipe; the lower end of the sampling pipe is detachably connected with an annular cutter, and a control panel is arranged at the upper end of one side of the outer wall of the fixed pipe. By means of the sampling device, diseased skin tissue of a patient can be sampled, the bottom of the sampled tissue can be cut off during sampling, sampling can be directly completed while subsequent operation steps are avoided, and the wound of the patient cannot be expanded.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a skin surface sampling device. Background Art

[0002] Skin biopsy is a traumatic clinical examination. It is performed by taking samples from the lesions of skin diseases and conducting histopathological examination to achieve the ultimate goal of clinical diagnosis or treatment. There is subcutaneous tissue under the skin, which is loose connective tissue with a large number of fat cells. Therefore, the pathological examination of skin tissue slices is of great significance for the clinical diagnosis of certain skin diseases. The sample size of the lesion skin is small, and the sample can be taken by scraping or cutting the lesion skin.

[0003] According to patent number CN220967331U, a utility model patent of a skin disease diagnosis sampling device includes a rotating handle and an annular cutter, the lower end of the rotating handle is rotatably mounted with an outer sleeve, and a limit plate is provided on the periphery of the lower end of the outer sleeve, the annular cutter penetrates the interior of the outer sleeve and extends out of the lower end of the outer sleeve, a ring plate is fixed inside the annular cutter, a sampling cavity for accommodating skin tissue is formed between the ring plate and the lower end of the annular cutter, a through hole is opened in the middle of the ring plate, and a piston block that can slide along the inner wall of the annular cutter is provided above the ring plate, a pull rod is connected above the piston block, and the pull rod rotates inside the handle and passes through the top surface of the rotating handle. The utility model arranges that after the medical staff cuts the patient's skin tissue with a trephine, the pull rod controls the pull rod to pull the piston block upward, so that the cut skin tissue is directly sucked into the sampling cavity, which is convenient for direct separation of the skin tissue, and there is no need to use auxiliary tools such as tweezers for separation operation, making the entire sampling process simpler and faster.

[0004] Although the above technical solution can complete the sampling of skin tissue, the tissue is directly torn off the patient's body through negative pressure after the trephine excision. Since the bottom of the trephinated tissue part is not cut off and is still in an adhered state, the operation of preventing direct separation of the skin tissue by negative pressure adsorption will not only cause incomplete sampling, but also increase the trauma of the patient's wound to a certain extent. Summary of the invention

[0005] The purpose of the present invention is to provide a skin surface sampling device, which can sample the diseased skin tissue of a patient and can cut off the bottom of the sampled tissue during sampling, thereby avoiding subsequent operation steps and completing the sampling directly without increasing the trauma of the patient's wound.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A skin surface sampling device, comprising a fixed tube with an opening at the lower end, the outer wall of the fixed tube is provided with a cross-shaped notch inwardly near the bottom thereof, the inner wall of the fixed tube is slidably connected with a connecting frame, the connecting frame comprises two connecting rings arranged opposite to each other, a plurality of connecting rods arranged between the two connecting rings at equal intervals, a through hole is downwardly provided at the upper end of the outer wall of the fixed tube, an electric push rod is cooperatively installed between the left and right sides of the upper end of the connecting frame and the upper end of the inner wall of the fixed tube, a sampling tube extending out of the through hole and its lower end and opened at both upper and lower ends is rotatably connected in the two connecting rings, a gear ring is provided at the upper end of the outer wall of the sampling tube, a driving motor is installed at one side of the upper end of the connecting frame, and a gear meshing with the gear ring and used to drive the sampling tube to rotate is installed at the upper end of the power output shaft of the driving motor;

[0008] The inner wall of the sampling tube is provided with a fixed ring connected to the upper and lower ends thereof, and the two fixing rings are slidably and rotatably connected with separation components whose two ends extend out of the sampling tube. The inner edge of the lower end of the sampling tube is recessed upward and provided with a groove, and the left and right sides of the upper end of the outer wall of the sampling tube are downwardly provided with a rotating groove connected to the groove, each rotating groove is rotatably connected with a rotating shaft extending out of the upper and lower ends thereof, and the lower end of each rotating shaft is provided with an arc-shaped cutting blade in the groove, and the left and right sides of the upper end of the sampling tube are rotatably connected with an auxiliary block fixedly connected to the upper end of the corresponding rotating shaft and in an L shape, the vertical length of each cutting blade is smaller than the radius of the sampling tube, and the lower end of the sampling tube is detachably connected with a ring cutting knife connected thereto, and a control panel is provided at the upper end of one side of the outer wall of the fixed tube, and the electric push rod and the driving motor are electrically connected to the control panel.

[0009] By adopting the above technical solution, when using, first sterilize and disinfect the skin position of the patient where sampling is required, then place the fixed tube vertically at the sampling position and then fix it, then push the separation component to make the lower end of the separation component contact with the patient's skin, and let the separation component absorb the skin at this position, then power on the device, operate the control panel, let the electric push rod work, the electric push rod extends and drives the sampling tube to slide downward along the inner wall of the fixed tube through the connecting frame and let the ring cutting knife contact with the patient's skin, then let the driving motor work, the driving motor drives the gear to rotate and drives the sampling tube and the ring cutting knife to rotate through the gear ring meshing with it, and at the same time, the electric push rod The rod continues to extend a certain length to allow the circumcision knife to cut the tissue on the patient's skin surface. When the sampling depth is reached, the drive motor stops working, and then the auxiliary block is rotated to rotate the rotating shaft in the rotating groove, and at the same time, the cutting blade in the groove is rotated inward to cut off the lower end of the cut sample from the bottom of the patient's wound, and then the separation component is pulled upward to remove the sampled tissue from the wound, and then the electric push rod is restored to its initial state. After removing the fixed tube from the patient, the separation component is slid downward again to extend it out of the lower end of the fixed tube, and then a test tube or vessel is used to separate the sample tissue from the separation component to complete the sampling of the skin surface.

[0010] The present invention is further configured as follows: the outer wall of the fixed tube is slidably connected to a support frame that slides along its length direction, and the support frame includes a sliding sleeve, a threaded hole opened on one side of the outer wall of the sliding sleeve and connected thereto, a fixing bolt threadedly connected to the threaded hole, and support feet that are respectively inclined downward and outwardly arranged on the left and right sides of the outer wall of the sliding sleeve.

[0011] By adopting the above technical solution, when taking samples from the patient's limbs, the fixing tube can be in vertical contact with the patient's skin through the support frame, and the distance between the lower end of the fixing tube and the patient's skin surface can be adjusted in real time, thereby improving its flexibility of use.

[0012] The present invention is further configured as follows: a suction cup matching with the bottom of each leg is provided.

[0013] By adopting the above technical solution, the stability of the support frame can be further improved to avoid shaking during sampling, which would affect the normal sampling operation.

[0014] The present invention is further configured as follows: the separation assembly includes a connecting pipe with openings at both ends, a piston sliding along the length direction of the inner wall of the connecting pipe, a threaded rod arranged at the upper end of the outer wall of the piston and extending out of the opening at the upper end of the connecting pipe, and a fixing nut threadedly connected to the outer wall of the threaded rod.

[0015] By adopting the above technical solution, the sample tissue can be taken out directly from the wound after cutting the sample, which reduces subsequent operations, avoids the loss of sample tissue and improves work efficiency.

[0016] The present invention is further configured as follows: a limiting frame in a U-shape and used to limit the rotation of the separation component is provided between the left and right sides of the upper end of the outer wall of the fixed tube, and the separation component is slidably connected in the limiting frame.

[0017] By adopting the above technical solution, the separation component can be prevented from rotating when cutting the sample tissue, thereby avoiding affecting the maintenance of the negative pressure state between the connecting tube and the sample component and avoiding affecting the separation between the sample tissue and the wound.

[0018] The present invention is further configured as follows: the lower end of the connecting pipe is connected to a trumpet-shaped suction hopper which is small at the top and large at the bottom.

[0019] By adopting the above technical solution, the stability of the separation component during adsorption and fixation can be improved by increasing the area between the separation component and the patient's skin.

[0020] The present invention is further configured as follows: a laser rangefinder is installed on one side of the lower end of the connecting frame.

[0021] By adopting the above technical solution, the depth range during sampling can be accurately controlled, thereby improving the accuracy of sampling.

[0022] The present invention is further configured as follows: a torsion spring is disposed between the bottom of each auxiliary block and the upper end of the sampling tube and is sheathed on the outer wall of the corresponding rotating shaft.

[0023] By adopting the above technical solution, the torsion spring can not only allow the cutting blade to automatically return to its original state after use, but also prevent the cutting blade from extending out of the groove and affecting its normal sampling when the circular cutting knife is sampling.

[0024] In summary, the present invention has the following beneficial effects:

[0025] First, the present invention can sample the diseased skin tissue of the patient, and the bottom of the sampled tissue can be cut off during sampling, thereby avoiding subsequent operation steps and completing the sampling directly without increasing the trauma of the patient's wound;

[0026] Secondly, after sampling, the present invention can directly remove the sample tissue from the wound of the patient through the separation component, which reduces the subsequent operations and avoids the loss of the sample component;

[0027] Thirdly, the support frame of the present invention can keep the fixed tube always vertically arranged with respect to the patient's skin surface during sampling, which facilitates sampling and improves the stability during the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is mainly used to show the position and connection relationship of each component;

[0030] Figure 3 It is mainly used to show through holes and threaded holes;

[0031] Figure 4 It is mainly used to display cutting blades and circumcision knives;

[0032] Figure 5 It is a schematic diagram of the structure of the separation component of the present invention.

[0033] In the figure: 1. fixing tube; 11. notch; 12. through hole; 13. support frame; 14. sleeve; 15. threaded hole; 16. fixing bolt; 17. support foot; 18. suction cup; 19. connecting frame; 2. connecting ring; 21. connecting rod; 22. sampling tube; 23. electric push rod; 24. gear ring; 25. driving motor; 26. gear; 27. fixing ring; 28. separation assembly; 29. ​​connecting pipe; 3. piston; 31. threaded rod; 32. fixing nut; 33. suction bucket; 34. groove; 35. rotating groove; 36. rotating shaft; 37. cutting blade; 38. auxiliary block; 39. torsion spring; 4. ring cutter; 41. limit frame; 42. laser rangefinder; 43. control panel. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example, see Figure 1-5 , a skin surface sampling device, comprising a fixed tube 1 with an opening at the lower end, a support frame 13 sliding along the length direction of the fixed tube 1 is slidably connected to the outer wall of the fixed tube 1, the support frame 13 comprises a sliding sleeve 14, a threaded hole 15 opened on one side of the outer wall of the sliding sleeve 14 and connected thereto, a fixing bolt 16 threadedly connected to the threaded hole 15, and legs 17 respectively inclined downward and arranged outwardly on the left and right sides of the outer wall of the sliding sleeve 14, each leg 17 is provided with a suction cup 18 matched therewith at the bottom, a notch 11 arranged in a cross shape is opened inwardly on the outer wall of the fixed tube 1 near its bottom, a connecting frame 19 is slidably connected to the inner wall of the fixed tube 1, the connecting frame 19 comprises two connecting rings 2 arranged oppositely, four connecting rods 21 arranged between the two connecting rings 2 at equal intervals, a through hole 12 is opened downwardly at the upper end of the outer wall of the fixed tube 1, an electric push rod 23 is installed between the left and right sides of the upper end of the connecting frame 19 and the upper end of the inner wall of the fixed tube 1, and a laser rangefinder 42 is installed on one side of the lower end of the connecting frame 19.

[0039] A sampling tube 22 extending from the through hole 12 and its lower end and opened at both ends is rotatably connected in the two connecting rings 2. A gear ring 24 is provided at the upper end of the outer wall of the sampling tube 22. A driving motor 25 is installed on one side of the upper end of the connecting frame 19. A gear 26 meshing with the gear ring 24 and used to drive the sampling tube 22 to rotate is installed at the upper end of the power output shaft of the driving motor 25. A fixing ring 27 connected to the inner wall of the sampling tube 22 is provided near the upper and lower ends thereof. A sampling tube 22 extending from both ends is slidably and rotatably connected in the two fixing rings 27. 2, the separation component 28 includes a connecting pipe 29 with openings at both ends, a piston 3 sliding along the length direction of the inner wall of the connecting pipe 29, a threaded rod 31 arranged at the upper end of the outer wall of the piston 3 and extending out of the upper end opening of the connecting pipe 29, and a fixing nut 32 threadedly connected to the outer wall of the threaded rod 31. The lower end of the connecting pipe 29 is connected to a suction bucket 33 that is small at the top and large at the bottom and is shaped like a trumpet. A U-shaped limiting frame 41 is provided between the left and right sides of the upper end of the outer wall of the fixed pipe 1 and is used to limit the rotation of the separating component 28. The separating component 28 is slidably connected in the limiting frame 41.

[0040] The inner edge of the lower end of the sampling tube 22 is recessed upward to provide a groove 34, and a rotating groove 35 connected to the groove 34 is opened downward on both sides of the left and right sides of the upper end of the outer wall of the sampling tube 22, and each rotating groove 35 is rotatably connected to a rotating shaft 36 extending from its upper and lower ends, and the lower end of each rotating shaft 36 is provided with an arc-shaped cutting blade 37 in the groove 34, and the vertical length of each cutting blade 37 is smaller than the radius of the sampling tube 22, and the left and right sides of the upper end of the sampling tube 22 are rotatably connected to an auxiliary block 38 fixedly connected to the upper end of the corresponding rotating shaft 36 and in an L shape, and a torsion spring 39 is provided between the bottom of each auxiliary block 38 and the upper end of the sampling tube 22 and is sleeved on the outer wall of the corresponding rotating shaft 36, and the lower end of the sampling tube 22 is detachably connected to a ring cutting knife 4 connected thereto, and a control panel 43 is provided on the upper end of one side of the outer wall of the fixed tube 1, and the electric push rod 23, the drive motor 25 and the laser rangefinder 42 are all electrically connected to the control panel 43.

[0041] Method of use: When using, first sterilize and disinfect the skin position where the patient needs to take samples, then place the support frame 13 in an appropriate position and fix it through the suction cup 18 at the bottom of the support leg 17, then loosen the fixing bolt 16 in the threaded hole 15, let the lower end of the fixing tube 1 contact and fix it with the peripheral position of the patient's skin where the sample is taken, when adjusting the position of the fixing tube 1, the fixing tube 1 is placed vertically at the sampling position, then push the separation assembly 28 in the fixing ring 27 downward, let the suction bucket 33 at the lower end of the connecting tube 29 contact the patient's skin, then pull the piston 3 upward through the threaded rod 31 to slide and form a negative pressure between the lower end of the connecting tube 29 and the patient's skin to adsorb and fix it, during this period, the adsorption and fixation state of the suction bucket 33 can be observed through the notch 11, then turn the fixing nut 32 downward and let it contact with the upper end of the connecting tube 29 to limit the downward movement of the threaded rod 31, and at the same time, the suction bucket 33 further improves the stability of adsorption and fixation of the skin sample by increasing the contact area between the skin.

[0042] Then, the device is powered on, and the control panel 43 is operated to start the electric push rod 23. The electric push rod 23 extends and drives the sampling tube 22 to slide downward along the inner wall of the fixed tube 1 and the through hole 12 through the connecting frame 19, and allows the circumcision knife 4 to contact the patient's skin. Then, the driving motor 25 is operated, and the driving motor 25 drives the gear 26 to rotate and drives the sampling tube 22 and the circumcision knife 4 to rotate in the connecting rings 2 at the upper and lower ends of the connecting rod 21 through the gear ring 24 meshing therewith. At the same time, the electric push rod 23 continues to extend a certain length to allow the circumcision knife 4 to cut the tissue on the surface of the patient's skin. When the sampling tube 22 slides downward, the laser rangefinder 42 on the connecting ring 2 at the bottom of the connecting frame 19 can monitor the sliding distance of the sampling tube 22 in real time to achieve accurate sampling. When the sampling tube 22 rotates, the limit frame 41 can limit the connecting tube 29 to rotate with it, so as to avoid the suction bucket 33 from being separated from the surface of the sample tissue, resulting in the failure of the negative pressure state.

[0043] When the sampling depth is reached, the driving motor 25 stops working, and then the auxiliary block 38 is rotated to rotate the rotating shaft 36 in the rotating groove 35, and at the same time, the cutting blade 37 in the groove 34 is rotated inward and cooperates with each other to cut off the lower end of the cut sample from the bottom of the patient's wound, and then the auxiliary block 38 is released, and the torsion spring 39 can automatically drive the rotating shaft 36 to rotate to restore the cutting blade 37 to its initial state, and then pull the separation component 28 upward to remove the sampled tissue from the wound position, and then let the electric push rod 23 return to its initial state, remove the fixed tube 1 from the patient, slide the separation component 28 downward again, let it extend out of the lower end of the fixed tube 1, place the test tube or vessel in an appropriate position, and then rotate the fixing nut 32 upward, and push the threaded rod 31 downward, and separate the sample tissue from the suction bucket 33 by releasing the negative pressure state at the lower end of the connecting tube 29, so as to complete the sampling work on the skin surface.

[0044] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. A skin surface sampling device, comprising a fixed tube (1) with an opening at the lower end, characterized in that: The outer wall of the fixed tube (1) is provided with a cross-shaped notch (11) inwardly near the bottom thereof; the inner wall of the fixed tube (1) is slidably connected with a connecting frame (19); the connecting frame (19) comprises two connecting rings (2) arranged opposite to each other and a plurality of connecting rods (21) arranged between the two connecting rings (2) at equal intervals; the upper end of the outer wall of the fixed tube (1) is provided with a through hole (12) extending downwardly; the left and right sides of the upper end of the connecting frame (19) are connected to the upper end of the inner wall of the fixed tube (1). An electric push rod (23) is installed in cooperation between the two connecting rings (2), a sampling tube (22) extending out of the through hole (12) and its lower end and open at both ends is rotatably connected in the two connecting rings (2), a gear ring (24) is arranged at the upper end of the outer wall of the sampling tube (22), a driving motor (25) is installed on one side of the upper end of the connecting frame (19), and a gear (26) meshing with the gear ring (24) and used to drive the sampling tube (22) to rotate is installed at the upper end of the power output shaft of the driving motor (25); The inner wall of the sampling tube (22) is provided with a fixed ring (27) in communication with the sampling tube (22) near its upper and lower ends. Separation components (28) are slidably and rotatably connected in the two fixed rings (27) and both ends of the separation components extend out of the sampling tube (22). The inner edge of the lower end of the sampling tube (22) is recessed upward to provide a groove (34). Rotation grooves (35) in communication with the grooves (34) are provided downward on the left and right sides of the upper end of the outer wall of the sampling tube (22). A rotation shaft (36) extending out of the upper and lower ends of the rotation shaft (36) is rotatably connected in each rotation groove (35). The lower end of each rotation shaft (36) is located at the bottom of the rotation groove (35). The groove (34) is provided with an arc-shaped cutting blade (37). The left and right sides of the upper end of the sampling tube (22) are rotatably connected to an L-shaped auxiliary block (38) fixedly connected to the upper end of the corresponding rotating shaft (36). The vertical length of each cutting blade (37) is smaller than the radius of the sampling tube (22). The lower end of the sampling tube (22) is detachably connected to a circular cutting knife (4) connected thereto. A control panel (43) is provided at the upper end of one side of the outer wall of the fixed tube (1). The electric push rod (23) and the drive motor (25) are electrically connected to the control panel (43).

2. A skin surface sampling device according to claim 1, characterized in that: The outer wall of the fixed tube (1) is slidably connected to a support frame (13) that slides along its length direction, and the support frame (13) comprises a sliding sleeve (14), a threaded hole (15) opened on one side of the outer wall of the sliding sleeve (14) and connected thereto, a fixing bolt (16) threadedly connected to the threaded hole (15), and supporting feet (17) that are respectively arranged on left and right sides of the outer wall of the sliding sleeve (14) in an inclined manner downward and outward.

3. A skin surface sampling device according to claim 2, characterized in that: The bottom of each leg (17) is provided with a suction cup (18) matched therewith.

4. A skin surface sampling device according to claim 1, characterized in that: The separation assembly (28) comprises a connecting pipe (29) with openings at both upper and lower ends, a piston (3) sliding along the length direction of the inner wall of the connecting pipe (29), a threaded rod (31) arranged at the upper end of the outer wall of the piston (3) and extending out of the upper end opening of the connecting pipe (29), and a fixing nut (32) threadedly connected to the outer wall of the threaded rod (31).

5. A skin surface sampling device according to claim 1 or 4, characterized in that: A limiting frame (41) is arranged in a U shape between the left and right sides of the upper end of the outer wall of the fixed tube (1) and is used to limit the rotation of the separation component (28). The separation component (28) is slidably connected in the limiting frame (41).

6. A skin surface sampling device according to claim 4, characterized in that: The lower end of the connecting pipe (29) is connected to a trumpet-shaped suction hopper (33) which is small at the top and large at the bottom.

7. A skin surface sampling device according to claim 1, characterized in that: A laser rangefinder (42) is installed on one side of the lower end of the connecting frame (19).

8. A skin surface sampling device according to claim 1, characterized in that: A torsion spring (39) is disposed between the bottom of each auxiliary block (38) and the upper end of the sampling tube (22) and is sheathed on the outer wall of the corresponding rotating shaft (36).

Images