Efficient bacteriostatic minimally invasive collection device for great saphenous vein

Abstract

The present invention relates to the technical field of medical instruments. Disclosed is an efficient, bacteriostatic, minimally invasive collection device for a great saphenous vein, which comprises

Description

FIELD OF TECHNOLOGY

[0001] The present invention relates to the technical field of medical instruments, specifically to an efficient bacteriostatic minimally invasive collection device for great saphenous vein. BACKGROUND

[0002] In bypass surgery, it is necessary to collect a bridge vessel (target vessel) from the patient's body, typically the great saphenous vein or the radial artery. In conventional surgery, the skin and muscle tissue must be completely stripped, and the target vessel is separated from the collateral vessels under direct vision. The surgery generally requires making an incision in the patient's leg or arm that corresponds to the length of the target vessel, usually 20-25 cm. The patient experiences significant intraoperative trauma, long postoperative recovery time, high chance of infection, intense and prolonged pain, and noticeable scarring after recovery. Nowadays, the minimally invasive endoscopic vessel harvesting system can assist a doctor in performing minimally invasive surgery on the leg or arm. The doctor only needs to make I to 2 small incisions of 1-2 cm on the patient's leg or forearm to easily extract the target vessel. This method causes very little intraoperative trauma to the patient, reduces the possibility of infection and complications, decreases pain, shortens postoperative recovery time, and is more aesthetically pleasing.

[0003] Chinese Patent No. CN106943175A has disclosed a minimally invasive great saphenous vein collection device, where a vascular protective trocar penetrates into a trocar cutting knife, and the trocar cutting knife penetrates into a tissue fixation trocar. A first gear at the tail end of the trocar cutting knife is located outside the tail end of the tissue fixation trocar, and the inner thread of the first gear engages with the external thread at the tail end of the vascular protective trocar. A transmission device includes a front support body and a rear support body, with the tail end of the tissue fixation trocar fixed at a front through hole of the front support body and the tail end of the vascular protective trocar fixed at a rear through hole of the rear support body. A rotating shaft and a second gear meshing with the first gear are arranged between the front support body and the rear support body, and a drive device is connected to the rotating shaft. The present invention has a simple structure, reasonable design, and low cost; it is easy to operate and master, causes minimal trauma to the patient, has high safety, and the time required for vein collection is short. The average time for collecting each vessel is 2-3 minutes, which is only 1 / 10 of the time required by the best current endoscopic collection system, thus improving surgical efficiency.

[0004] However, in this great saphenous vein collection device, the trocar cutting knife is directly exposed to the external environment during vessel collection. During use, the trocar cutting knife may come into contact with objects containing bacteria, resulting in poor bacteriostatic performance.

[0005] Therefore, it is necessary to provide an efficient bacteriostatic minimally invasive collection device for great saphenous vein to resolve the above technical problems. SUMMARY

[0006] An objective of the present invention is to provide an efficient bacteriostatic minimally invasive collection device for great saphenous vein to resolve the problems raised in the background.

[0007] To achieve the foregoing objective, the present invention provides the following technical solution: An efficient bacteriostatic minimally invasive collection device for great saphenous vein is provided, including a grip, a trocar cutting knife, and a protective trocar. The protective trocar is disposed in the trocar cutting knife, the trocar cutting knife is rotatably connected to the protective trocar, and the protective trocar penetrates the grip. The grip is provided with a drive mechanism configured to drive the trocar cutting knife to move relative to the grip, a bacteriostatic cylinder is fixedly mounted at one end of the grip, the trocar cutting knife penetrates the bacteriostatic cylinder, an ultraviolet lamp tube is fixedly mounted in the bacteriostatic cylinder, and a cleaning mechanism is disposed at an end of the bacteriostatic cylinder and configured to clean the trocar cutting knife.

[0008] According to a further solution of the present invention, the cleaning mechanism includes a fixing cap and a cleaning cotton, the fixing cap is threadedly mounted at the end of the bacteriostatic cylinder, the cleaning cotton is annular, the trocar cutting knife penetrates the cleaning cotton, and an inner annular wall of the cleaning cotton is in contact with an outer wall of the trocar cutting knife.

[0009] According to a further solution of the present invention, a plurality of fixing posts are fixedly mounted on an end wall of the bacteriostatic cylinder, a bottom wall of the fixing cap is provided with a through hole, a blocking ring is disposed in the through hole, a bottom end of each fixing post is fixedly connected to the blocking ring, and the trocar cutting knife penetrates the blocking ring.

[0010] According to a further solution of the present invention, the drive mechanism includes a threaded pipe and a nut, the threaded pipe sleeves an outer wall of the trocar cutting knife, the threaded pipe is disposed in the grip, the nut is fixedly mounted in the grip, the threaded pipe penetrates the nut, the threaded pipe is threadedly connected to the nut, a first gear sleeves an end of the threaded pipe away from the nut, and a drive assembly is disposed in the grip and configured to drive the first gear to rotate.

[0011] According to a further solution of the present invention, the drive assembly includes a second gear and a motor, the second gear is rotatably mounted in the grip, the second gear meshes with the first gear, the motor is fixedly mounted in the grip, and an output end of the motor is drivingly connected to the second gear.

[0012] According to a further solution of the present invention, a limiting post is fixedly mounted in the grip, a slide ring is slidably mounted on the limiting post, and the slide ring is fixedly connected to an outer wall of the protective trocar via a connecting rod.

[0013] According to a further solution of the present invention, a fixing mechanism is disposed at a top end of the grip and configured to fix a guide wire, the fixing mechanism includes a support seat, the support seat is coaxially arranged with the trocar cutting knife, the support seat is provided with a groove, the groove communicates with an inner cavity of the grip, two clamping seats are symmetrically disposed in the groove, the two clamping seats are each rotatably connected to the support seat via a connecting post, the two connecting posts are each sleeved with a torsion spring, and an adjusting plate is fixedly mounted on a side wall of the clamping seat.

[0014] According to a further solution of the present invention, the clamping seat includes a clamping portion and a rotating portion, the connecting post is fixedly mounted on the rotating portion, the clamping portion is triangular, an inclined surface is disposed on the clamping portion, and a plurality of fixing protrusions are disposed on the inclined surface.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In surgery, the skin at both ends of the vein to be harvested is first cut, and the vein is severed, with the end vein ligated. Then, the guide wire passes through the inside of the protective trocar and through the inside of the vein, and then the guide wire emerges from the skin incision. The drive mechanism then drives the trocar cutting knife to leave the grip, causing the trocar cutting knife to be inserted into the tissue. During tissue cutting, the vessel is always located in the protective trocar, thereby protecting the vessel and preventing the trocar cutting knife from cutting the vessel. The bacteriostatic cylinder protects the trocar cutting knife, preventing the trocar cutting knife from contacting the external environment. The ultraviolet lamp tube in the bacteriostatic cylinder can disinfect the trocar cutting knife, achieving an efficient bacteriostasis effect. The cleaning mechanism can clean the blood on the trocar cutting knife during extension and retraction of the trocar cutting knife, thereby preventing bacterial growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a schematic structural three-dimensional diagram according to the present invention.

[0017] FIG. 2 is a schematic structural enlarged view of part A in FIG. 1 according to the present invention.

[0018] FIG. 3 is a schematic structural cross-sectional view according to the present invention.

[0019] FIG. 4 is a schematic structural enlarged view of part B in FIG. 3 according to the present invention.

[0020] FIG. 5 is a schematic structural cross-sectional view of a trocar cutting knife according to the present invention.

[0021] FIG. 6 is a schematic structural cross-sectional view of a cleaning mechanism according to the present invention.

[0022] FIG. 7 is a schematic structural cross-sectional view of a fixing mechanism fixing a guide wire according to the present invention.

[0023] FIG. 8 is a schematic structural three-dimensional diagram of the fixing mechanism fixing the guide wire according to the present invention.

[0024] FIG. 9 is a schematic structural cross-sectional view of the fixing mechanism during insertion of the guide wire according to the present invention.

[0025] FIG. 10 is a schematic structural three-dimensional diagram of a clamping seat according to the present invention.

[0026] FIG. 11 is a schematic structural enlarged view of part C in FIG. 10 according to the present invention.

[0027] In the figures: 1. grip; 2. bacteriostatic cylinder; 3. trocar cutting knife; 4. ultraviolet lamp tube; 5. fixing mechanism; 51. support seat; 52. clamping seat; 521. rotating portion; 522. clamping portion; 523. inclined surface; 53. adjusting plate; 54. connecting post; 55. torsion spring; 56. fixing protrusion; 6. cleaning mechanism; 61. fixing cap; 62. cleaning cotton; 63. fixing post; 64. blocking ring; 7. blade; 8. protective trocar; 9. threaded pipe; 10. nut; 11. first gear; 12. second gear; 13. motor; 14. connecting rod; 15. slide ring; 16. limiting post; and 17. guide wire. DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. It is evident that the described embodiments are merely some 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 those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0029] Refer to FIGs. 1 to 5. In an embodiment of the present invention, an efficient bacteriostatic minimally invasive collection device for great saphenous vein includes a grip 1, a trocar cutting knife 3, and a protective trocar 8. The protective trocar 8 is used to protect the vessel and the protective trocar 8 is disposed in the trocar cutting knife 3, with the trocar cutting knife 3 rotatably connected to the protective trocar 8. In other words, the trocar cutting knife 3 can rotate relative to the protective trocar 8, but the protective trocar 8 cannot slide relative to the trocar cutting knife 3. The protective trocar 8 penetrates the grip 1, the grip 1 is provided with a drive mechanism configured to drive the trocar cutting knife 3 to move relative to the grip 1, and a bacteriostatic cylinder 2 is fixedly mounted at one end of the grip 1. The trocar cutting knife 3 penetrates the bacteriostatic cylinder 2. An ultraviolet lamp tube 4 is fixedly mounted in the bacteriostatic cylinder 2, and a cleaning mechanism 6 is disposed at an end of the bacteriostatic cylinder 2 and configured to clean the trocar cutting knife 2. In surgery, the skin at both ends of the vein to be harvested is first cut, and the vein is severed, with the end vein ligated. Then, the guide wire 17 passes through the inside of the protective trocar 8 and through the inside of the vein, and then the guide wire 17 emerges from the skin incision. The drive mechanism then drives the trocar cutting knife 3 to leave the grip 1, causing the trocar cutting knife 3 to be inserted into the tissue. During tissue cutting, the vessel is always located in the protective trocar 8, thereby protecting the vessel and preventing the trocar cutting knife 3 from cutting the vessel. The bacteriostatic cylinder 3 protects the trocar cutting knife 3, preventing the trocar cutting knife 3 from contacting the external environment. The ultraviolet lamp tube 4 in the bacteriostatic cylinder 2 can disinfect the trocar cutting knife 3, achieving an efficient bacteriostasis effect. The cleaning mechanism 6 can clean the blood on the trocar cutting knife 3 during extension and retraction of the trocar cutting knife 3, thereby preventing bacterial growth.

[0030] In this embodiment, preferably, the cleaning mechanism 6 includes a fixing cap 61 and a cleaning cotton 62, the fixing cap 61 is threadedly mounted at the end of the bacteriostatic cylinder 2, the cleaning cotton 62 is annular, the trocar cutting knife 3 penetrates the cleaning cotton 62, and an inner annular wall of the cleaning cotton 62 is in contact with an outer wall of the trocar cutting knife 3. The cleaning cotton 62 can be fixed via the fixing cap 61. When the cleaning cotton 62 is replaced, it is only necessary to unscrew the fixing cap 61, and then remove and replace the cleaning cotton 62. Rotating the fixing cap 61 can adjust the size of the chamber formed between the fixing cap 61 and the bacteriostatic cylinder 2, thereby adjusting the pressure of the cleaning cotton 62 on the trocar cutting knife 3, so as to adjust the cleaning force.

[0031] In this embodiment, preferably, the drive mechanism includes a threaded pipe 9 and a nut 10, the threaded pipe 9 sleeves an outer wall of the trocar cutting knife 3, the outer wall of the threaded pipe 9 is provided with a thread, the threaded pipe 9 is disposed in the grip 1, the nut 10 is fixedly mounted in the grip 1, the threaded pipe 9 penetrates the nut 10, the threaded pipe 9 is threadedly connected to the nut 10, a first gear 11 sleeves an end of the threaded pipe 9 away from the nut 10, and a drive assembly is disposed in the grip 1 and configured to drive the first gear 11 to rotate.

[0032] In this embodiment, preferably, the drive assembly includes a second gear 12 and a motor 13, the second gear 12 is rotatably mounted in the grip 1, the second gear 12 meshes with the first gear 11, the second gear 12 is longer than the first gear 11, the motor 13 is fixedly mounted in the grip 1, and an output end of the motor 13 is drivingly connected to the second gear 12. A button is provided on the grip 1, and a battery is arranged in the grip 1. The battery is electrically connected to the motor 13 via the button. There are two buttons: one button controls the forward rotation of the output end of the motor 13, and the other button controls the reverse rotation of the output end of the motor 13. When the motor 13 is activated, the output end of the motor 13 drives the second gear 12 to rotate, and when the second gear 12 rotates, it drives the first gear 11 to rotate. When the first gear 11 rotates, it drives the threaded pipe 9 to rotate. Since the threaded pipe 9 is threadedly connected to the nut 10, the rotation of the threaded pipe 9 allows for movement relative to the grip 1, thereby driving the trocar cutting knife 3 to rotate and move relative to the grip 1, enabling the trocar cutting knife 3 to cut tissues more effectively.

[0033] In this embodiment, preferably, a blade 7 is provided at the end of the trocar cutting knife 3 away from the grip 1, and the blade 7 is preferably wavy. The blade 7 can be used to cut tissues.

[0034] In this embodiment, preferably, a limiting post 16 is fixedly mounted in the grip 1, and the limiting post 16 and the threaded pipe 9 are arranged in parallel. A slide ring 15 is slidably mounted on the limiting post 16, and the slide ring 15 is fixedly connected to the outer wall of the protective trocar 8 via a connecting rod 14. The arrangement of the limiting post 16 and the slide ring 15 ensures that the protective trocar 8 can only move relative to the grip 1 and cannot rotate relative to the grip 1, thereby preventing the protective trocar 8 from being driven to rotate when the trocar cutting knife 3 rotates, and avoiding the rotation of the protective trocar 8 from damaging the vessel.

[0035] Refer to FIG. 6. In the embodiments of the present invention, multiple fixing posts 63 are fixedly mounted on the end wall of the bacteriostatic cylinder 2. The bottom wall of the fixing cap 61 is provided with a through hole, and a blocking ring 64 is arranged in the through hole. The bottom end of the fixing post 63 is fixedly connected to the blocking ring 64, and the trocar cutting knife 3 penetrates the blocking ring 64. When the cleaning cotton 62 absorbs much blood and affects the cleaning effect, the blood on the cleaning cotton 62 can be squeezed out partially by tightening the fixing cap 61. During operation, the fixing cap 61 is tightened, such that the fixing cap 61 compresses the cleaning cotton 62, and when the fixing cap 61 moves, it causes the blocking ring 64 to move out of the through hole, allowing the blood squeezed from the cleaning cotton 62 to flow out through the through hole, thus making it easier to squeeze out the blood for cleaning. In addition, the arrangement of the blocking ring 64 ensures that during surgery, the blood on the cleaning cotton 62 is less likely to overflow through the through hole.

[0036] Refer to FIGs. 2, and 7 to 11. In an embodiment of the present invention, a fixing mechanism 5 is disposed at a top end of the grip 1 and configured to fix a guide wire 17, the fixing mechanism 5 includes a support seat 51, the support seat 51 is coaxially arranged with the trocar cutting knife 3, the support seat 51 is provided with a groove, the groove communicates with an inner cavity of the grip 1, two clamping seats 52 are symmetrically disposed in the groove, the two clamping seats 52 are each rotatably connected to the support seat 51 via a connecting post 54, and the two connecting posts 54 are each sleeved with a torsion spring 55. One end of the torsion spring 55 is fixedly connected to the connecting post 54, and the other end of the torsion spring 55 is fixedly connected to the support seat 51. The arrangement of the torsion spring 55 ensures that in the natural state, the two clamping seats 52 are pressed together. The side wall of the clamping seat 52 is fixedly mounted with an adjusting plate 53. The two clamping seats 52 can be separated from each other by simultaneously pressing the two adjusting plates 53.

[0037] In this embodiment, preferably, the clamping seat 52 includes a clamping portion 522 and a rotating portion 521. The connecting post 54 is fixedly mounted on the rotating portion 521. The clamping portion 522 is triangular and the clamping portion 522 is provided with an inclined surface 523. Multiple fixing protrusions 56 are arranged on the inclined surface 523. When the guide wire 17 is fixed, the fixing protrusions 56 press on the guide wire 17, thereby fixing the guide wire 17. The fixing protrusions 56 are preferably made of non-slip and elastic rubber material. During surgery, the two adjusting plates 53 are simultaneously pressed. Pressing the adjusting plates 53 causes the clamping seats 52 to rotate, placing the two clamping seats 52 in the state shown in FIG. 9. Then, one end of the guide wire 17 is enabled to slide into the groove along the inclined surface 523 of the clamping seat 52, and then the wire is precisely inserted into the interior of the protective trocar 8 via the gap between the two clamping seats 52. After the guide wire 17 passes through the protective trocar 8 and protrudes a certain length from the other end, the adjusting plates 53 are released. At this time, the clamping seats 52 rotate back to the state shown in FIG. 7 under the action of the torsion spring 55, causing the oppositely arranged fixing protrusions 56 to approach each other, thereby clamping the guide wire 17. This allows the guide wire 17 to guide the movement of the trocar cutting knife 3 during surgery and facilitates the fixing of the guide wire 17, reducing the difficulty of the surgery.

[0038] Working principle: During surgery, the two adjusting plates 53 are simultaneously pressed. The pressing of the adjusting plates 53 causes the clamping seats 52 to rotate, placing the two clamping seats 52 in the state shown in FIG. 9. Then, one end of the guide wire 17 is enabled to slide into the groove along the inclined surface 523 of the clamping seat 52, and the wire is precisely inserted into the interior of the protective trocar 8 via the gap between the two clamping seats 52. After the guide wire 17 passes through the protective trocar 8 and protrudes a certain length from the other end, the adjusting plates 53 are released. At this time, the clamping seats 52 rotate back to the state shown in FIG. 7 under the action of the torsion spring 55, causing the oppositely arranged fixing protrusions 56 to approach each other, thereby clamping the guide wire 17. Next, the skin at both ends of the vein to be harvested is first cut, and the vein is severed, with the end vein ligated. The guide wire 17 then passes through the interior of the vein, with the end of the guide wire 17 exiting through the skin incision. Then, the drive mechanism is used to move the trocar cutting knife 3 in the direction away from the grip 1, causing the trocar cutting knife 3 to be inserted into the tissue. When the tissue is cut, the vessel is always located in the protective trocar 8, thus protecting the vessel and preventing the trocar cutting knife 3 from cutting the vessel. The bacteriostatic cylinder 2 protects the trocar cutting knife 3, preventing the trocar cutting knife 3 from coming into contact with the external environment. The ultraviolet lamp tube 4 in the bacteriostatic cylinder 2 disinfects the trocar cutting knife 3, providing an efficient bacteriostatic effect. The cleaning mechanism 6 can clean the blood on the trocar cutting knife 3 during extension and retraction of the trocar cutting knife 3, thereby preventing bacterial growth. When the motor 13 is activated, the output end of the motor 13 drives the second gear 12 to rotate, and when the second gear 12 rotates, it drives the first gear 11 to rotate. When the first gear 11 rotates, it drives the threaded pipe 9 to rotate, and since the threaded pipe 9 is threadedly connected to the nut 10, the rotation of the threaded pipe 9 allows for movement relative to the grip 1, thereby driving the trocar cutting knife 3 to rotate and move relative to the grip 1, enabling the trocar cutting knife 3 to cut tissues more effectively. The cleaning cotton 62 can be fixed via the fixing cap 61. When the cleaning cotton 62 is replaced, it is only necessary to unscrew the fixing cap 61, and then remove and replace the cleaning cotton 62. Rotating the fixing cap 61 can adjust the size of the chamber formed between the fixing cap 61 and the bacteriostatic cylinder 2, thereby adjusting the pressure of the cleaning cotton 62 on the trocar cutting knife 3, so as to adjust the cleaning force. When the cleaning cotton 62 absorbs much blood and affects the cleaning effect, the blood on the cleaning cotton 62 can be squeezed out partially by tightening the fixing cap 61. During operation, the fixing cap 61 is tightened, such that the fixing cap 61 compresses the cleaning cotton 62, and when the fixing cap 61 moves, it causes the blocking ring 64 to move out of the through hole, allowing the blood squeezed from the cleaning cotton 62 to flow out through the through hole, thus making it easier to squeeze out the blood for cleaning.

[0039] The above description is a detailed explanation of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall into the patent scope of the present invention.

Claims

1. An efficient bacteriostatic minimally invasive collection device for great saphenous vein, comprising a grip (1), a trocar cutting knife (3), and a protective trocar (8), wherein the protective trocar (8) is disposed in the trocar cutting knife (3), the trocar cutting knife (3) is rotatably connected to the protective trocar (8), and the protective trocar (8) penetrates the grip (1), wherein the grip (1) is provided with a drive mechanism configured to drive the trocar cutting knife (3) to move relative to the grip (1), a bacteriostatic cylinder (2) is fixedly mounted at one end of the grip (1), the trocar cutting knife (3) penetrates the bacteriostatic cylinder (2), an ultraviolet lamp tube (4) is fixedly mounted in the bacteriostatic cylinder (2), and a cleaning mechanism (6) is disposed at an end of the bacteriostatic cylinder (2) and configured to clean the trocar cutting knife (3).

2. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 1, wherein the cleaning mechanism (6) comprises a fixing cap (61) and a cleaning cotton (62), the fixing cap (61) is threadedly mounted at the end of the bacteriostatic cylinder (2), the cleaning cotton (62) is annular, the trocar cutting knife (3) penetrates the cleaning cotton (62), and an inner annular wall of the cleaning cotton (62) is in contact with an outer wall of the trocar cutting knife (3).

3. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 2, wherein a plurality of fixing posts (63) are fixedly mounted on an end wall of the bacteriostatic cylinder (2), a bottom wall of the fixing cap (61) is provided with a through hole, a blocking ring (64) is disposed in the through hole, a bottom end of each fixing post (63) is fixedly connected to the blocking ring (64), and the trocar cutting knife (3) penetrates the blocking ring (64).

4. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 1, wherein the drive mechanism comprises a threaded pipe (9) and a nut (10), the threaded pipe (9) sleeves an outer wall of the trocar cutting knife (3), the threaded pipe (9) is disposed in the grip (1), the nut (10) is fixedly mounted in the grip (1), the threaded pipe (9) penetrates the nut (10), the threaded pipe (9) is threadedly connected to the nut (10), a first gear (11) sleeves an end of the threaded pipe (9) away from the nut (10), and a drive assembly is disposed in the grip (1) and configured to drive the first gear (11) torotate.

5. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 4, wherein the drive assembly comprises a second gear (12) and a motor (13), the second gear (12) is rotatably mounted in the grip (1), the second gear (12) meshes with the first gear (11), the motor (13) is fixedly mounted in the grip (1), and an output end of the motor (13) is drivingly connected to the second gear (12).

6. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 5, wherein a limiting post (16) is fixedly mounted in the grip (1), a slide ring (15) is slidably mounted on the limiting post (16), and the slide ring (15) is fixedly connected to an outer wall of the protective trocar (8) via a connecting rod (14).

7. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 1, wherein a fixing mechanism (5) is disposed at a top end of the grip (1) and configured to fix a guide wire (17), the fixing mechanism (5) comprises a support seat (51), the support seat (51) is coaxially arranged with the trocar cutting knife (3), the support seat (51) is provided with a groove, the groove communicates with an inner cavity of the grip (1), two clamping seats (52) are symmetrically disposed in the groove, the two clamping seats (52) are each rotatably connected to the support seat (51) via a connecting post (54), the two connecting posts (54) are each sleeved with a torsion spring (55), and an adjusting plate (53) is fixedly mounted on a side wall of the clamping seat (52).

8. The efficient bacteriostatic minimally invasive collection device for great saphenous vein according to claim 7, wherein the clamping seat (52) comprises a clamping portion (522) and a rotating portion (521), the connecting post (54) is fixedly mounted on the rotating portion (521), the clamping portion (522) is triangular, an inclined surface (523) is disposed on the clamping portion (522), and a plurality of fixing protrusions (56) are disposed on the inclined surface (523).A. CLASSIFICATION OF SUBJECT MATTERA61B 17 / 32(2006.01)i; A61B90 / 70(2016.01)i; A61B17 / 00(2006.01)i; A61B17 / 94(2006.01)i; A61L2 / 10(2006.01)iAccording to International Patent Classification (IPC) or to both national classification and IPCB. FIELDS SEARCHEDMinimum documentation searched (classification system followed by classification symbols) IPC: A61BA61LDocumentation searched other than minimum documentation to the extent that such documents are included in the fields searchedElectronic data base consulted during the international search (name of data base and, where practicable, search terms used) CNTXT; WPABSC; ENTXTC; VEN; ENTXT; CNKI: WEIS. WK, E#, ER, WWE, EW,DOCUMENTS CONSIDERED TO BE RELEVANTCategory* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. PX CN 115349922 A (NANJING DRUM TOWER HOSPITAL) 18 November 2022 (2022-11-18) claims 1-8 1-8 Y Y CN 207821880 U (DALIAN KEWANWEI MEDICAL TECHNOLOGY CO., LTD.) 07 September 2018 (2018-09-07) description, paragraphs [0006]-[0052], and figures 1-6 CN 215231111 U (SECOND AFFILIATED HOSPITAL OF NANCHANG UNIVERSITY) 21 December 2021 (2021-12-21) description, paragraphs [0020]-[0022], and figure 1 1,2,4-8 1,2, 4-8 Y CN 212853591 U (BRAIN HOSPITAL OF HUNAN PROVINCE) 02 April 2021 (2021-04-02) description, paragraphs [0027]-[0033], and figures 1 and 2 1, 2, 4-8 Y CN 217090853 U (LU'AN PEOPLE' S HOSPITAL) 02 August 2022 (2022-08-02) description, paragraphs [0013]-[0022], and figure 1 7,8 A CN 114796813 A (THE THIRD XIANGYA HOSPITAL OF CENTRAL SOUTH UNIVERSITY et al.) 29 July 2022 (2022-07-29) entire document 1-8| | Further documents are listed in the continuation of Box C.annex.* Special categories of cited documents: “T” later document published after the international filing date or priority “A” document defining the general state of the art which is not considered date and not in conflict with the application but cited to understand the to be of particular relevance principle or theory underlying the invention “D” document cited by the applicant in die international application “X” document of particular relevance; the claimed invention cannot be “E" earlier application orpatent but published on or after the international considered novel or cannot be considered to involve an inventive step filing date when the document is taken alone •SL” document which may throw doubts on priority claim(s) or which is “Y” document of particular relevance; the claimed invention cannot be cited to establish the publication date of another citation or other considered to involve an inventive step when the document is special reason (as specified) combined with one or more other such documents, such combination “O” document referring to an oral disclosure, use, exhibition or other being obvious to a person skilled in the art means document member of the same patent family “P” document published prior to the international filing date but later than the priority date claimed Date of the actual completion of the international search 20 November 2023 Date of mailing of the international search report 05 December 2023 Name and mailing address of the ISA / CN China National Intellectual Property Administration (ISA / CN) China No. 6, Xitucheng Road, Jimenqiao, Haidian District, Beijing 100088 Authorized officer Telephone No.C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. A CN 215739330 U (YAO YANGDUAN) 08 February 2022 (2022-02-08) entire document 1-8 A US 6019771 A (CARDIOTHORACIC SYSTEMS, INC.) 01 February 2000 (2000-02-01) entire document 1-8PCT / CN2023 / 113339Patent document cited in search report Publication date (day / month / year) Patent family member)s) Publication date (day / month / year) CN 115349922 A 18 November 2022 None CN 207821880 U 07 September 2018 None CN 215231111 U 21 December 2021 None CN 212853591 U 02 April 2021 None CN 217090853 U 02 August 2022 None CN 114796813 A 29 July 2022 None CN 215739330 U 08 February 2022 None US 6019771 A 01 February 2000 None

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