A minimally invasive skin punch biopsy device and method of operation

Abstract

The application discloses a skin minimally invasive rotary cutting coring device and a working method thereof, and belongs to the technical field of medical devices. The skin minimally invasive rotary cutting coring device comprises a cut opening and expansion module and a rotary cutting coring module. The cut opening and expansion module is used for forming a cut on the skin and expanding the cut. The rotary cutting coring module is used for rotary cutting the skin around the expanded cut. The application can guarantee the neatness of the skin defect edge after rotary cutting, and make the skin defect be in a flat circular shape, so that effective closure of the defect can be realized through skin tension reduction treatment, and the beneficial effects of accelerated healing and reduced skin area can be obtained.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a minimally invasive skin core extraction device and its working method. Background Technology

[0002] Micro-coring technology is a non-surgical treatment for facial rejuvenation. Currently, the Cytrellis ellacor system is a prime example. It uses a hollow needle to shoot high-speed into the skin, removing cylindrical skin tissue and creating a dotted pattern of skin defects. The skin tightening effect is achieved through tissue contraction during the healing process.

[0003] During skin core retrieval, the high-speed impact of the core-retrieval needle into the skin creates significant pressure, resulting in irregularly torn edges on the skin defect. Furthermore, the resulting skin defect is nearly circular, which is difficult to close. If the defect does not close properly after surgery, it hinders the reduction of skin area. Summary of the Invention

[0004] The purpose of this invention is to provide a minimally invasive skin core extraction device and its working method. This device and method can ensure the neatness of the edges of the skin defect after extraction and make the skin defect flat and round, which is conducive to closing, thereby ensuring the effect of reducing the area after skin healing.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] A minimally invasive skin core extraction device includes:

[0007] An incision retraction module is used to create and retract incisions in the skin;

[0008] The rotary cutting core extraction module is used to rotary cut the skin around the opened incision.

[0009] As a further limitation of the present invention, the incision opening module includes a main body and an opening needle for inserting into the skin to form an incision and opening it. The opening needle is fixed on the main body, and the insertion end of the opening needle is in the shape of a straight line.

[0010] As a further limitation of the present invention, the rotary cutting core extraction module includes a tubular drill for rotary cutting the skin, the tubular drill being sleeved on the spreading needle and being able to slide and rotate relative to the spreading needle by an external force.

[0011] As a further limitation of the present invention, the main body is provided with a driving mechanism for driving the tubular drill to slide and rotate relative to the spreading needle. The driving mechanism includes a pusher, the spreading needle is inserted through the pusher, the pusher is slidably connected to the main body and a spring is provided between the two for applying a force to the pusher extending into the main body. The two ends of the spring abut against the pusher and the main body respectively. The tubular drill is rotatably connected to the pusher, and a motor for driving the tubular drill to rotate relative to it is installed on the pusher.

[0012] As a further limitation of the present invention, the cross-section of the insertion section of the spreading needle is circular or oval.

[0013] As a further limitation of the present invention, the spreading needle also includes a fixing section, one end of which is fixed to the main body, and one end of the insertion section is integrally connected to the other end of the fixing section. The other end of the insertion section has two opposite positions with inclined structures, and the other end of the insertion section forms an insertion end through the two inclined structures.

[0014] As a further limitation of the present invention, the inner diameter of the tubular drill is larger than the diameter of the insertion section of the spreading needle.

[0015] As a further limitation of the present invention, a limiting tube is fixed on the main body, a guide tube is fixed on the pushing member, the guide tube passes through the limiting tube, the spreading needle passes through the guide tube, and the tubular drill is located between the guide tube and the spreading needle.

[0016] As a further limitation of the present invention, the main body is integrally connected with two positioning plates arranged to the left and right of each other, and the spreading needle and the tubular drill are both located between the two positioning plates.

[0017] The present invention also provides a working method for the minimally invasive skin core extraction device based on the above technical solution, comprising the following steps:

[0018] Rotational operation: The drive mechanism drives the tubular drill to rotate relative to the spreading needle, while the spreading needle on the tubular drill remains in the inserted state.

[0019] The tube drill slides relative to the spreading needle through an external force via a drive mechanism until it reaches the bottom, at which point the spreading needle on the tube drill is in the inserted state.

[0020] Compared with the prior art, the present invention has the following advantages and effects:

[0021] (1) By using the structure of the spreading needle and the tubular drill, combined with the driving effect of the driving mechanism on the tubular drill, the present invention realizes the core extraction method of spreading first and then cutting. Compared with the method of inserting the core needle into the core, it not only ensures the neatness of the skin defect edge after cutting, but also makes the skin defect flat and round, reducing the difficulty of closing. Thus, under the condition of skin tension reduction treatment, the skin defect is in a closed state, which is conducive to healing, reduces the risk of scar formation, and ensures the effect of reducing the area after skin healing.

[0022] (2) The present invention can achieve multiple uses in one machine. It can be used not only for skin rejuvenation treatment, but also for acne scar and enlarged pore treatment, staged excision of stretch marks, staged excision of scars, excision of melanocytic nevi, abdominoplasty, autologous hair transplantation and skin pathology, so as to meet the need to reduce the risk of scar formation after skin excision and expand the scope of application of the device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a minimally invasive skin core extraction device according to the present invention.

[0024] Figure 2 This is a partial enlarged schematic diagram of the structure of a minimally invasive skin core extraction device according to the present invention.

[0025] Figure 3 This is a schematic diagram of the internal structure of a minimally invasive skin core extraction device according to the present invention, from one perspective.

[0026] Figure 4 This is a second-view schematic diagram of the internal structure of a minimally invasive skin core extraction device according to the present invention.

[0027] The components include: main body 1, spreading needle 2, insertion end 21, fixing section 22, insertion section 23, inclined structure 24, tubular drill 3, driving mechanism 4, pushing component 41, spring 42, motor 43, belt drive mechanism 44, left housing 51, right housing 52, insert post 53, slot 54, positioning piece 6, limiting tube 7, guide tube 8, upper tube body 81, and lower tube body 82. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0029] See Figures 1-4This embodiment discloses a minimally invasive skin rotary cutting and core extraction device, including an incision opening module for forming and opening an incision on the skin, and a rotary cutting and core extraction module for rotary cutting the skin around the opened incision. The incision opening module includes a main body 1 and an opening needle 2 for inserting into the skin to form and open an incision. The opening needle 2 is fixed on the main body 1, and the insertion end 21 of the opening needle 2 is in the shape of a straight line. The rotary cutting and core extraction module includes a tubular drill 3 for rotary cutting the skin. The tubular drill 3 is sleeved on the opening needle 2 and can be driven by external force to slide and rotate relative to the opening needle 2.

[0030] The main body 1 is provided with a drive mechanism 4 for driving the tubular drill 3 to slide and rotate relative to the spreading needle 2. The drive mechanism 4 includes a pusher 41, the spreading needle 2 is inserted through the pusher 41, the pusher 41 is slidably connected to the main body 1 and a spring 42 is provided between the two for applying a force to the pusher 41 that extends into the main body 1. The two ends of the spring 42 abut against the pusher 41 and the main body 1 respectively. The tubular drill 3 is rotatably connected to the pusher 41. A motor 43 for driving the tubular drill 3 to rotate relative to it is installed on the pusher 41. The motor 43 is connected to the tubular drill 3 through a belt drive mechanism 44.

[0031] During the skin excision operation, the insertion end 21 of the spreading needle 2 is aligned with the skin to be excised along the direction perpendicular to the skin and inserted to form a straight incision. As the insertion depth of the spreading needle 2 increases, the spreading needle 2 spreads the incision. Then, an external force pushes the pusher 41, causing it to slide the tubular drill 3 relative to the main body 1 (such as pressing with a finger or applying external force to the pusher 31 using a linear drive device, such as an electric push rod or a linear motor). At the same time, the motor 43 drives the tubular drill 3 to rotate relative to the spreading needle 2, thereby allowing the tubular drill 3 to excised the skin to a certain depth. After the excision is completed, the excised skin tissue is removed from the incision through the spreading needle 2 and the tubular drill 3 and is taken out together. As the spreading needle 2 inserts and spreads the skin, the spreading range of the skin on both sides of the incision gradually decreases from the middle of the incision to both ends. This causes the compressive strength of the skin on both sides of the incision to gradually decrease from the middle of the incision to both ends. As a result, when the tubular drill 3 performs skin rotary cutting, the amount of skin tissue cut off gradually decreases from the middle of the incision to both ends. This allows the skin defect after rotary cutting to be flat and round, reducing the difficulty of closing the incision and enabling skin tension reduction treatment. This is beneficial for incision healing, reduces the risk of scar formation, and also improves the skin contraction effect.

[0032] In the above process, the tubular drill 3 can rotate and slide relative to the spreading needle 2, either by starting simultaneously or by starting to rotate first and then slide.

[0033] In this embodiment, both the main body 1 and the pusher 41 can adopt an assembly structure (i.e., both the main body 1 and the pusher 41 include a left shell 51 and a right shell 52, and either the left shell 51 or the right shell 52 can be integrally connected with a plug 53, and the other shell has a slot 54 adapted to the plug 53), which reduces the processing and manufacturing difficulty of the main body 1 and the pusher 41, and also facilitates the assembly of the internal components of the main body 1 and the pusher 41.

[0034] See Figure 1 , Figure 2 The main body 1 is integrally connected with two positioning plates 6 that are symmetrically arranged on the left and right sides. The spreading needle 2 and the tubular drill 3 are both located between the two positioning plates 6. In use, the positioning plates 6 can directly abut against the skin surface to achieve vertical positioning, ensuring that the skin at a specific location can be rotary cut.

[0035] See Figure 2 , Figure 3 The spreading needle 2 includes a fixed section 22 and an insertion section 23. One end of the fixed section 22 is fixed to the main body. The cross-section of the insertion section 23 is circular or flattened. One end of the insertion section 23 is integrally connected to the other end of the fixed section 22. The other end of the insertion section 23 has two opposite positions with inclined structures 24, and the two inclined structures 24 are symmetrically arranged on the left and right. The other end of the insertion section 23 forms an insertion end 21 through the two inclined structures 24, which ensures that the sharp tip formed by the symmetrical inclined surfaces can easily penetrate the skin and smoothly guide the incision to open during subsequent insertion, reducing the risk of tearing of the incision due to forced opening.

[0036] See Figure 2 The inner diameter of the tubular drill 3 is larger than the diameter of the insertion section 23 of the spreading needle 2, so that when the tubular drill 3 is fitted onto the spreading needle 2, a gap space can be formed between the two, which can be used as a core extraction channel for skin tissue and can collect the skin tissue that has been cut off, ensuring the removal of the skin tissue after cutting off. At the same time, it can also reduce the risk of the spreading needle 2 colliding with the blade on the tubular drill 3 when the device is in operation.

[0037] See Figure 3 , Figure 4 The main body 1 is fixed with a limiting tube 7, and the pusher 41 is fixed with a guide tube 8. The guide tube 8 passes through the limiting tube 7, the spreading needle 2 passes through the guide tube 8, and the tubular drill 3 is located between the guide tube 8 and the spreading needle 2. This improves the straightness of the pusher 41 sliding relative to the main body 1 and reduces the risk of uneven incision edges and unnecessary damage to the tissue around the skin core extraction site caused by the swing of the tubular drill 3. At the same time, the nested structure between the limiting tube 7, the guide tube 8, the tubular drill 3 and the spreading needle 2 achieves a compact arrangement between the components, thereby reducing the volume.

[0038] In this embodiment, the guide tube 8 includes an upper tube body 81 and a lower tube body 82, both of which are fixed to the pusher 41. The upper tube body 81 passes through the limiting tube 7, and the spreading needle 2 passes through both the upper tube body 81 and the lower tube body 82. The belt drive mechanism 44 is located between the upper tube body 81 and the lower tube body 82. The top end of the tubular drill 3 is inserted into the upper tube body 81, and its bottom end passes through the lower tube body 82. The segmented structure of the guide tube 8 ensures a nested structure between the spreading needle 2, the tubular drill 3, and the guide tube 8, and also allows the motor 43 to drive the tubular drill 3 to rotate relative to the spreading needle 2 via the belt drive mechanism 44.

[0039] The above description is merely illustrative of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined by the claims, all of which should fall within the protection scope of this invention.

Claims

1. A minimally invasive skin core extraction device, characterized in that, include: An incision retraction module is used to create and retract incisions in the skin; The rotary cutting core extraction module is used to rotary cut the skin around the opened incision.

2. The minimally invasive skin core extraction device according to claim 1, characterized in that: The incision opening module includes a main body and an opening needle for inserting into the skin to form an incision and opening it. The opening needle is fixed to the main body, and the insertion end of the opening needle is in the shape of a straight line.

3. The minimally invasive skin core extraction device according to claim 2, characterized in that: The rotary cutting core extraction module includes a tubular drill for rotary cutting the skin. The tubular drill is sleeved on the spreading needle and can be driven by external force to slide and rotate relative to the spreading needle.

4. The minimally invasive skin core extraction device according to claim 3, characterized in that: The main body is provided with a drive mechanism for driving the tubular drill to slide and rotate relative to the spreading needle. The drive mechanism includes a pusher, the spreading needle is inserted through the pusher, the pusher is slidably connected to the main body and a spring is provided between the two for applying a force to the pusher that extends into the main body. The two ends of the spring abut against the pusher and the main body respectively. The tubular drill is rotatably connected to the pusher, and a motor for driving the tubular drill to rotate relative to it is installed on the pusher.

5. The minimally invasive skin core extraction device according to any one of claims 2-4, characterized in that: The cross-section of the insertion section of the spreading needle is circular or oval.

6. The minimally invasive skin core extraction device according to claim 5, characterized in that: The spreading needle also includes a fixing section. One end of the fixing section is fixed to the main body, and one end of the insertion section is integrally connected to the other end of the fixing section. The other end of the insertion section has two opposite positions with inclined structures, and the other end of the insertion section forms an insertion end through the two inclined structures.

7. The minimally invasive skin core extraction device according to claim 3 or 4, characterized in that: The inner diameter of the tubular drill is larger than the diameter of the insertion section of the spreading needle.

8. The minimally invasive skin core extraction device according to claim 7, characterized in that: The main body is fixed with a limiting tube, the pusher is fixed with a guide tube, the guide tube passes through the limiting tube, the spreading needle passes through the guide tube, and the tubular drill is located between the guide tube and the spreading needle.

9. The minimally invasive skin core extraction device according to claim 7, characterized in that: The main body is integrally connected to two positioning plates that are arranged to the left and right of each other, and the spreading needle and the tubular drill are both located between the two positioning plates.

10. A method of operating the minimally invasive skin core extraction device according to any one of claims 1-9, characterized in that, Includes the following steps: Rotational operation: The drive mechanism drives the tubular drill to rotate relative to the spreading needle, while the spreading needle on the tubular drill remains in the inserted state. The tube drill slides relative to the spreading needle through an external force via a drive mechanism until it reaches the bottom, at which point the spreading needle on the tube drill is in the inserted state.

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