Miniature medical multipurpose skin taking and grafting machine

Abstract

The invention provides a miniature medical multipurpose skin taking and grafting machine which comprises a shell with the maximum outer diameter smaller than 30 mm; the vacuum chamber is arranged in the shell and is connected with the negative pressure device; the rotary sampling knife mechanism is mounted on the shell, the sample outlet end of the rotary sampling knife mechanism is communicated with the vacuum chamber, and the rotary sampling knife mechanism is used for rotationally cutting skin tissues; the tissue collector is used for collecting skin pulp or releasing waste skin, the shell is provided with a first notch for inserting the tissue collector, the vacuum chamber is provided with a second notch for inserting the tissue collector, and the tissue collector or the vacuum chamber is provided with a sealing assembly for sealing the second notch when the tissue collector is inserted into the second notch. According to the skin grafting device, small-area skin taking can be carried out, skin pulp can be scraped, the skin removing operation of skin in a hair-free area, vitiligo, birthmarks, scars, tattoos and the like can be completed at a time, skin taking, trimming and tiling operation can be completed at a time with the help of a tissue collector, and the success rate of the skin grafting operation can be greatly increased.

Description

Technical Field

[0001] The present application relates to the technical field of surgical instruments, and in particular to a miniature medical multi-purpose skin grafting machine. Background Art

[0002] Free skin grafting is to cut off part of the thickness or the full thickness of the human skin from one place, completely separate it from the body, and transplant it to another place to re-establish blood circulation and continue to maintain its vitality to achieve the purpose of repair. This surgical method is called free skin grafting or free skin grafting. This skin graft is generally 1cm×1cm to 2cm×2cm in size, so it is also called stamp-shaped skin grafting. Clinically, this skin graft is divided into thin-layer skin grafts (average thickness of about 0.3mm), medium-thickness skin grafts (average thickness of 0.3-0.6mm), and full-thickness skin grafts (including the entire epidermis and dermis, but without fat tissue and subdermal vascular network) according to the thickness of the skin graft. Among them, medium-thickness skin grafts include thin medium-thickness skin grafts that include part of the epidermis and dermis, or thick medium-thickness skin grafts that reach three-quarters of the full thickness of the skin. This skin graft has the characteristics of full-thickness skin because it contains more elastic tissue and contains hair follicles and sebaceous gland tissue, less shrinkage, softness, and wear resistance. The donor area can heal itself, so it is widely used clinically to repair skin defects on the face or joints, or wounds left after removing scars or tumors; it is used to repair fresh wounds in functional areas. However, if there is tendon or bone surface exposed, it should be covered with nearby soft tissue before skin grafting; it is used for healthy granulation wounds and areas that require higher function and appearance. In clinical practice, the size of the donor area is determined according to the size of the area of ​​the skin graft.

[0003] There are many kinds of skin knives used clinically at home and abroad at present, which are roughly divided into roller skin knives for bare-hand skin method and domestic automatic skin grafting skin knives derived therefrom and ZIMMER pneumatic skin knives, drum skin machines, etc. produced in the U.S. However, the area of ​​the skin that these skin knives can take is relatively large, which is not suitable for the peeling in the skin grafting of small areas, especially special parts, such as the peeling of vitiligo, birthmark, scar, tattoo on the face, and the skin can not be used and taken, and the skin flap also needs to be trimmed and paved again and the work is more cumbersome. At present, there is no special scalpel for the small area and shape of the controllable area size applicable under the above conditions and the one-time completion of taking skin, trimming, paving.

[0004] In addition, current domestic and foreign studies have shown that skin pulp tissue is more likely to survive in the transplanted wound, so skin pulp transplantation is widely used in clinical skin defects. However, it is still done by taking large pieces of skin and using skin pulp preparation equipment. This is a great waste of skin tissue and is not suitable for small skin defects. Summary of the invention

[0005] In order to improve the problem that existing skin harvesting instruments are not suitable for small-area skin harvesting and waste skin tissue when preparing skin pulp, the present application provides a miniature medical multi-purpose skin harvesting and grafting machine.

[0006] The present application provides a micro medical multi-purpose skin grafting machine adopts the following technical solution: A miniature medical multi-purpose skin grafting machine, comprising: The shell has a maximum outer diameter of less than 30 mm; A vacuum chamber, disposed in the housing and connected to the negative pressure device; A rotary sampling knife mechanism is mounted on the housing and its sampling end is connected to the vacuum chamber, and is used for rotary cutting of skin tissue; and A tissue collector is used to collect leather pulp or release waste leather. The shell is provided with a first notch for inserting the tissue collector, and the vacuum chamber is provided with a second notch for inserting the tissue collector. The tissue collector or the vacuum chamber is provided with a sealing component for sealing the second notch when the tissue collector is inserted into the second notch.

[0007] Furthermore, the tissue collector comprises: A collection frame, plug-fitted with the second notch; A handle is fixedly connected to the collection frame, and when the collection frame is fully plugged into the second notch, the free end of the handle extends out of the shell from the first notch; And if the tissue collector is used to collect skin pulp, a collection net is also laid in the hollow part of the collection frame.

[0008] Furthermore, the free end of the handle is provided with an anti-slip structure.

[0009] Furthermore, the sealing assembly is configured as a sealing ring fixedly connected to both end surfaces of the collection frame.

[0010] Furthermore, the rotary sampling knife mechanism comprises: A knife disc is installed at one end of the vacuum chamber and has a plurality of tissue suction holes arranged in an array; A plurality of blades are provided and fixed to a side of the blade disc facing away from the vacuum chamber; and The rotary drive assembly is used to drive the cutter disc to rotate.

[0011] Furthermore, the rotary drive assembly comprises: A rotating disk is airtightly rotatably mounted on one end of the vacuum chamber, and the knife disc is detachably mounted on the rotating disk, and the two are coaxially and comovably arranged; An outer gear ring, coaxially fixed to the rotating disk; A transmission shaft is rotatably mounted in the housing, one end of which is coaxially fixedly connected to a first gear meshing with the outer gear ring, and the other end of which is coaxially fixedly connected to a second gear; and A driving member is used for driving the second gear to rotate.

[0012] Furthermore, a protective ring is protruding from one end of the shell close to the cutter disc and surrounds the outer circumference of the cutter disc.

[0013] Furthermore, a plurality of positioning baffles are installed on the outer peripheral wall of the vacuum chamber, and the transmission shaft is rotatably installed on or passes through the positioning baffles.

[0014] Furthermore, a switch for controlling the opening and closing of the micro motor is arranged on the housing.

[0015] Furthermore, the vacuum chamber is connected to a negative pressure tube, and the shell is provided with a guide nozzle for the negative pressure tube to pass through.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. When taking skin with the skin-taking and skin-grafting machine of the present application, the housing is held vertically to the skin, and the rotary sampling knife mechanism is aligned and pressed against the surface of the skin to be taken or to be taken. The rotary sampling knife mechanism can remove the skin tissue on the surface of the target skin, or the skin in the hairless area, vitiligo, birthmarks, scars, tattoos, etc. that need to be removed when working. These skin tissues or skin are sucked into the vacuum chamber under the action of the negative pressure device; if skin grafting is required, the tissue collector collects the skin tissue; if only skin is taken, the tissue collector releases the waste skin and is sucked away by the negative pressure device, and the operation of taking skin and skin grafting can be flexibly switched; 2. Since the blade rotates and cuts the skin as the blade rotates with the blade disc, and the outer diameter of the shell can be as small as a few centimeters, it can achieve small-area skin harvesting, which can greatly reduce the probability of skin tissue being wasted; and it can complete the acquisition of skin tissue for skin transplantation in a small area at one time, and it can also complete the acquisition of skin tissue with hair follicle tissue for hair transplantation at one time, and it can also complete the skin removal of hairless areas, vitiligo, birthmarks, scars, tattoos and other skin at one time, without the need for multiple instruments, which can greatly reduce the cost of the operation; 3. When skin grafting is required after skin harvesting, a collection frame with a collection net can be inserted into the second notch of the vacuum chamber. At this time, the skin tissue fragments cut by the rotating blade are flattened on the collection net on the collection frame under the suction of the negative pressure device. After the skin harvesting is completed, the collection frame can be taken out and the skin tissue fragments adsorbed on the collection net can be directly applied to the fresh wound surface. The skin harvesting, trimming and paving operations can be completed at one time, which can greatly improve the success rate of skin grafting surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is an end view of the overall structure of the embodiment of the present application; Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present application; Figure 4 is a schematic structural diagram of a tissue collector according to an embodiment of the present application; Figure 5 It is a schematic diagram of the overall structure of the embodiment of the present application after the shell is hidden.

[0019] Reference numerals: 1. Shell; 11. First notch; 12. Protective ring; 13. Switch; 14. Guide nozzle; 2. Vacuum chamber; 21. Second notch; 22. Negative pressure tube; 3. Rotary sampling knife mechanism; 31. Knife disc; 311. Tissue suction hole; 32. Blade; 4. tissue collector; 41. collection frame; 42. handle; 43. collection net; 44. sealing ring; 51. rotating disk; 52. outer gear ring; 53. transmission shaft; 54. first gear; 55. second gear; 56. third gear; 57. micro motor; 6. Position the baffle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Reference Figure 1 , Figure 2 and Figure 3 The present application discloses a miniature medical multi-purpose skin grafting machine, which includes: The shell 1 has a maximum outer diameter of less than 30 mm. The shell 1 is cylindrical in shape, and its cross-section can be any shape that is convenient for holding, such as circular, elliptical, polygonal, etc. In the present embodiment, the shell 1 is circular; and in order to access skin tissue of different small areas, the maximum outer diameter of the shell 1 can be adaptively set, such as an outer diameter of 15 mm, 20 mm, etc.

[0022] The vacuum chamber 2 is disposed in the housing 1 and connected to the negative pressure device.

[0023] The rotary sampling knife mechanism 3 is installed at one end of the housing 1 and its sample outlet is connected to the vacuum chamber 2, and is used for peeling the skin tissue. Specifically, an opening is provided at one end of the vacuum chamber 2, and the rotary sampling knife mechanism 3 is airtightly installed at the opening. The tissue collector 4 is used to collect leather pulp or release waste leather. A first notch 11 for inserting the tissue collector 4 is provided on the shell 1, and a second notch 21 for inserting the tissue collector 4 is provided on the vacuum chamber 2. A sealing component is provided on the tissue collector 4 or the vacuum chamber 2 for sealing the second notch 21 when the tissue collector 4 is inserted into the second notch 21.

[0024] Thus, when using the present application, the vacuum chamber 2 is first connected to the medical continuous negative pressure suction device, and then the tissue collector 4 is inserted into the second notch 21 of the vacuum chamber 2 through the first notch 11, and the airtightness of the vacuum chamber 2 is maintained by the sealing component; then when taking the skin, the housing 1 can be held vertically to the skin, and the rotary sampling knife mechanism 3 can be aligned and pressed against the surface of the skin to be obtained or taken. The rotary sampling knife mechanism 3 can remove the skin tissue on the surface of the target skin, or the skin of the hairless area, vitiligo, birthmarks, scars, tattoos, etc. that need to be removed. These skin tissues or skin are sucked into the vacuum chamber 2 under the action of the negative pressure device. If skin grafting is required, the tissue collector 4 collects the skin tissue; if only skin grafting is required, the tissue collector 4 releases the waste skin and is sucked away by the negative pressure device, and can flexibly switch between skin grafting and skin grafting operations.

[0025] Moreover, since the rotary sampling knife mechanism 3 performs rotary cutting on the skin, and the outer diameter of the shell 1 can be as small as a few centimeters, it is possible to implement skin harvesting operations on a small area, which can greatly reduce the probability of skin tissue being wasted; and it is possible to obtain skin tissue for skin transplantation in a small area at one time, and it is also possible to obtain skin tissue with hair follicle tissue for hair transplantation at one time, and it is also possible to complete the skin peeling of hairless areas, vitiligo, birthmarks, scars, tattoos, etc. at one time, without the need to rely on multiple instruments, which can greatly reduce the cost of the operation.

[0026] Specifically, refer to Figure 3 and Figure 4 , the tissue collector 4 comprises: The collection frame 41 is plugged and matched with the second notch 21, and its shape is matched with the cross-section of the vacuum chamber 2; the sealing component is configured as a sealing ring 44 fixedly connected to the two end surfaces of the collection frame 41, and the sealing ring 44 is specifically made of silicone; the collection frame 41 can be made of disposable medical plastic, or it can be made of medical stainless steel that can be repeatedly sterilized.

[0027] The handle 42 is fixedly connected to the collection frame 41, and when the collection frame 41 is fully inserted into the second notch 21, the free end of the handle 42 extends from the first notch 11 to the outside of the shell 1, and the free end of the handle 42 is provided with an anti-slip structure, which can be an anti-slip protrusion or an anti-slip groove, so that the sealed and clamped collection frame 41 can be pulled out of the sub-vacuum chamber 2.

[0028] And if the tissue collector 4 is used to collect skin pulp, a collecting net 43 is also laid in the hollow part of the collecting frame 41, and the collecting net 43 is fixed on the collecting frame 41. The collecting net 43 can be medical gauze or other medical breathable mesh, which can isolate the skin tissue from passing through.

[0029] In this way, when skin grafting is required after skin removal, a collection frame 41 with a collection net 43 can be inserted into the second notch 21 of the vacuum chamber 2. At this time, the skin tissue fragments cut by the rotary sampling knife mechanism 3 are flattened on the collection net 43 on the collection frame 41 under the suction of the negative pressure device. After the skin removal is completed, the collection frame 41 is taken out, and the skin tissue fragments adsorbed on the collection net 43 can be directly applied to the fresh wound surface. The skin removal, trimming, and paving operations can be completed at one time, which can greatly improve the success rate of skin grafting. If skin removal is required, a collection frame 41 without a collection net 43 is inserted into the second notch 21 of the vacuum chamber 2. At this time, the waste skin cut by the rotary sampling knife mechanism 3 enters the vacuum chamber 2 and passes through the collection frame 41 and is directly sucked away by the negative pressure device. The role of the tissue collector 4 here is to seal the second notch 21 of the vacuum chamber 2 to ensure the suction effect of the waste skin cut by the rotary sampling knife mechanism 3.

[0030] In addition, refer to Figure 2 , Figure 3 and Figure 5 The above-mentioned rotary sampling knife mechanism 3 includes: The blade disc 31 is installed at one end of the vacuum chamber 2 and has a plurality of tissue suction holes 311 arranged in an array; The blades 32 are provided in plurality and fixed to the side of the cutter disc 31 facing away from the vacuum chamber 2. The blades 32 are arranged radially along the cutter disc 31. The plurality of blades 32 are arranged in a circle with equal spacing around the axis of the cutter disc 31. The blades 32 may be serrated or segmented along the radial direction of the cutter disc 31. When necessary, the serrations or segments on two adjacent blades 32 may be staggered so that the cut surfaces of the plurality of blades 32 when rotating simultaneously can form a complete circular surface; and The rotary drive assembly is used to drive the cutter disc 31 to rotate.

[0031] Among them, refer to Figure 3 and Figure 5 , the rotary drive assembly includes: The rotating disk 51 is airtightly rotatably mounted on one end of the vacuum chamber 2 with an opening, and the knife disc 31 is detachably mounted on the rotating disk 51, and the two are coaxially and co-movably arranged. Specifically, the knife disc 31 is fixed to the rotating disk 51 in a bolted manner, so that the knife disc 31 can be replaced as a whole, so that the skin grafting machine itself can be reused after disinfecting various susceptible parts; The outer gear ring 52 is coaxially fixed to the rotating disk 51; A transmission shaft 53 is rotatably mounted in the housing 1, one end of which is coaxially fixedly connected to a first gear 54 meshing with the outer gear ring 52, and the other end of which is coaxially fixedly connected to a second gear 55; and The driving member is used to drive the second gear 55 to rotate, which specifically includes a micro motor 57 installed on the end of the shell 1 away from the blade disc 31 and a third gear 56 coaxially fixed to the output end of the micro motor 57. The third gear 56 is meshingly connected with the second gear 55, so that the micro motor 57 can be installed on the central axis of the shell 1 to facilitate the outer diameter control of the shell 1, thereby realizing a small area skin removal operation; and a switch 13 for controlling the opening and closing of the micro motor 57 is provided on the shell 1.

[0032] In this way, when the switch 13 is pressed to start the micromotor 57, the micromotor 57 can drive the third gear 56 to rotate. When the third gear 56 rotates, it can drive the second gear 55 meshing with it to rotate, and then drive the first gear 54 to rotate with the help of the transmission shaft 53. When the first gear 54 rotates, it can drive the outer gear ring 52 meshing with it to rotate, so that the rotating disk 51 rotates on the vacuum chamber 2. As a result, the knife disk 31 rotates with the rotating disk 51 so that multiple blades 32 can perform rotary cutting and scraping on the target skin. These scraped skin or skin tissue fragments are sucked into the vacuum chamber 2 through the tissue suction hole 311 on the knife disk 31, thereby realizing the sampling operation of the rotary sampling knife mechanism 3.

[0033] In addition, refer to Figure 1 and Figure 2 A protective ring 12 is protruding from one end of the shell 1 close to the blade disc 31 and surrounding the outer circumference of the blade disc 31. The protective ring 12 can protect the side of the rotating blade disc 31; and the protective ring 12 can be fixed to the shell 1, or can be detachably installed on the shell 1, such as by magnetic attraction, rotational clamping, threaded connection, etc. By replacing the protective ring 12 of different thicknesses, the skin sampling depth of the rotary sampling knife mechanism 3 can also be flexibly controlled.

[0034] Moreover, to facilitate the production and assembly of this application, refer to Figure 3 and Figure 5 A plurality of positioning baffles 6 are installed on the outer peripheral wall of the vacuum chamber 2, and the plurality of positioning baffles 6 are arranged in sequence along the length direction of the vacuum chamber 2. The transmission shaft 53 is rotatably installed on the positioning baffles 6 or passes through the positioning baffles 6 to ensure the transmission stability of the transmission shaft 53; a negative pressure pipe 22 is also connected to the end of the vacuum chamber 2 away from the cutter disc 31, and a guide nozzle 14 for the negative pressure pipe 22 to pass through is provided on the shell 1, and the negative pressure pipe 22 is connected to the negative pressure device after passing through the guide nozzle 14.

[0035] The implementation principle of a micro medical multi-purpose skin grafting machine in the embodiment of the present application is: When using the present application, first connect the vacuum chamber 2 to the medical continuous negative pressure suction device, and then insert the tissue collector 4 into the second notch 21 of the vacuum chamber 2 through the first notch 11. Specifically, when skin grafting is required, select the collection frame 41 with the collection net 43, and when simple skin removal is required, select the collection frame 41 without the collection net 43. Then, when removing the skin, the housing 1 can be held vertically to the skin, the protective ring 12 can be aligned and pressed against the surface of the skin to be obtained or removed, and the switch 13 can be pressed to make the knife disc 31 drive the blade 32 thereon to rotate, so as to remove the skin tissue on the target skin surface, or the skin in the hairless area, vitiligo, birthmarks, scars, tattoos, etc. that need to be removed. These skin tissues or skin are sucked into the vacuum chamber 2 through the tissue suction hole 311 on the knife disc 31 under the action of the negative pressure device. When skin grafting is needed, the skin tissue fragments are spread on the collection net 43 on the collection frame 41, and the skin tissue fragments adsorbed on the collection net 43 can be directly applied to the fresh wound surface to complete the skin grafting; if only skin is taken, the cut waste skin is sucked away by the negative pressure device, and the skin taking and skin grafting operations can be switched flexibly.

[0036] Moreover, since the blade 32 on the knife disc 31 rotates and cuts the skin, and the outer diameter of the shell 1 can be as small as a few centimeters, it is possible to achieve skin removal operations on a small area, which can greatly reduce the probability of skin tissue being wasted; and it is possible to obtain skin tissue for skin transplantation in a small area at one time, and it is also possible to obtain skin tissue with hair follicle tissue for hair transplantation at one time, and it is also possible to complete the skin peeling of hairless areas, vitiligo, birthmarks, scars, tattoos, etc. at one time, without the need to rely on multiple instruments, which can greatly reduce the cost of the operation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A miniature medical multi-purpose skin grafting machine, characterized in that: include: The shell has a maximum outer diameter of less than 30 mm; A vacuum chamber, disposed in the housing and connected to the negative pressure device; A rotary sampling knife mechanism is installed on the housing and its sampling end is connected to the vacuum chamber, and is used for rotary cutting of skin tissue; as well as A tissue collector is used to collect leather pulp or release waste leather. The shell is provided with a first notch for inserting the tissue collector, and the vacuum chamber is provided with a second notch for inserting the tissue collector. The tissue collector or the vacuum chamber is provided with a sealing component for sealing the second notch when the tissue collector is inserted into the second notch.

2. The micro medical multi-purpose skin grafting machine according to claim 1 is characterized in that: The tissue collector comprises: A collection frame, plug-fitted with the second notch; A handle is fixedly connected to the collection frame, and when the collection frame is fully plugged into the second notch, the free end of the handle extends out of the shell from the first notch; And if the tissue collector is used to collect skin pulp, a collection net is also laid in the hollow part of the collection frame.

3. The micro medical multi-purpose skin grafting machine according to claim 2 is characterized in that: The free end of the handle is provided with an anti-slip structure.

4. The micro medical multi-purpose skin grafting machine according to claim 2 is characterized in that: The sealing assembly is configured as a sealing ring fixedly connected to both end surfaces of the collecting frame.

5. The micro medical multi-purpose skin grafting machine according to any one of claims 1 to 4, characterized in that: The rotary sampling knife mechanism comprises: A knife disc is installed at one end of the vacuum chamber and has a plurality of tissue suction holes arranged in an array; A plurality of blades are provided and fixed to a side of the blade disc facing away from the vacuum chamber; and The rotary drive assembly is used to drive the cutter disc to rotate.

6. The micro medical multi-purpose skin grafting machine according to claim 5 is characterized in that: The rotary drive assembly comprises: A rotating disk is airtightly rotatably mounted on one end of the vacuum chamber, and the knife disc is detachably mounted on the rotating disk, and the two are coaxially and comovably arranged; An outer gear ring, coaxially fixed to the rotating disk; A transmission shaft is rotatably mounted in the housing, one end of which is coaxially fixedly connected to a first gear meshing with the outer gear ring, and the other end of which is coaxially fixedly connected to a second gear; and A driving member is used for driving the second gear to rotate.

7. The micro medical multi-purpose skin grafting machine according to claim 5 is characterized in that: A protective ring is protruding from one end of the shell body close to the cutter disc and surrounding the outer circumference of the cutter disc.

8. The micro medical multi-purpose skin grafting machine according to claim 6 is characterized in that: A plurality of positioning baffles are installed on the outer peripheral wall of the vacuum chamber, and the transmission shaft is rotatably installed on or passes through the positioning baffles.

9. The micro medical multi-purpose skin grafting machine according to claim 6, characterized in that: The housing is provided with a switch for controlling the opening and closing of the driving member.

10. The micro medical multi-purpose skin grafting machine according to claim 1, characterized in that: The vacuum chamber is connected with a negative pressure pipe, and the shell is provided with a guide nozzle for the negative pressure pipe to pass through.

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