Amputation finger replantation fixation device
By designing a fixation device for finger replantation, which uses an airbag and limiting components to stabilize the severed finger, the problem of unstable fixation during finger replantation surgery is solved, improving the stability of the surgery and the effectiveness of precise operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN QIAOTOU HOSPITAL
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-14
AI Technical Summary
In current finger replantation surgery, the instability of fixation of the severed finger leads to displacement of the surgical field, affecting the surgical outcome. This is especially true in microsurgical procedures where it is difficult to maintain surgical stability and meet the requirements of delicate operation.
A finger replantation fixation device was designed, including a fixation frame, a support plate, an airbag, a finger fixation cylinder, and a limiting component. The airbag fixes the hand, and the moving and limiting components ensure the stability of the severed finger. The design of the support plate and fixation plate reduces intraoperative shaking and provides a stable operating platform.
This technique achieves stable fixation of severed fingers during replantation surgery, reduces the risk of intraoperative shaking and displacement, improves the precision of microsurgical manipulation and the success rate of surgery, and reduces the risk of infection.
Smart Images
Figure CN224484420U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, and in particular relates to a fixation device for replantation of severed fingers. Background Technology
[0002] Finger replantation surgery is a highly complex technique in the field of microsurgery. By anastomosing blood vessels, nerves, and bones, it restores blood circulation, sensation, and motor function to the severed finger, enabling the patient to regain fine motor skills such as grasping and pinching.
[0003] During finger replantation surgery, the severed finger needs to be fixed to prevent displacement and surgical failure. Current surgical methods generally use bandage traction, clamps, and assistants holding the injured hand with both hands to stabilize the injured hand. For detached severed fingers, assistants hold the finger with both hands for stability. Because the surgical field is small and the operation is delicate, the stability of the surgical field and the coordination of the position of the affected finger are extremely important. Fatigue and hand tremors of the assistant can interfere with the delicate operation under the microscope, causing great inconvenience to the operation and even affecting the surgical outcome. Utility Model Content
[0004] The purpose of this invention is to provide a fixation device for replanting severed fingers, which can effectively fix the severed fingers and ensure their stability during replantation surgery.
[0005] The aforementioned finger replantation fixation device includes a fixation frame, a fixation component for fixing the frame to an operating table, a support plate for placing the hand on the fixation frame, a receiving groove for inserting the hand at the top of the support plate extending to the rear side wall of the support plate, an airbag for restricting finger displacement within the receiving groove, a fixing plate on the rear side wall of the support plate, the bottom of the fixing plate being connected to the bottom of the support plate via a connecting plate, a finger fixation cylinder for the severed finger to pass through at the top of the fixing plate, a limiting component for restricting finger displacement on the finger fixation cylinder, an arc-shaped sliding groove at the top of the fixing plate, and a moving component that moves within the sliding groove at the bottom of the finger fixation cylinder.
[0006] Furthermore, the movable component includes a limiting frame with an "n"-shaped structure that is clamped onto the fixed plate. The bottom of the limiting frame is provided with universal ball bearings that slide in a groove. The limiting frame is connected to the severed finger fixing cylinder through a connecting column. The side wall of the limiting frame is provided with a threaded hole, and a screw is threaded into the threaded hole. The tightening end of the screw abuts against the side wall of the fixed plate.
[0007] Furthermore, a collection basin is provided below the support plate.
[0008] Furthermore, the limiting component includes a first threaded hole opened at the top of the severed finger fixing cylinder, a first threaded rod is threadedly connected to the first threaded hole, a first knob is fixed at the top of the first threaded rod, and a clamping plate is rotatably connected to the bottom of the first threaded rod.
[0009] Furthermore, a support rod is vertically installed at the top of the fixing frame, and a limiting plate is installed at the top of the support rod. A second threaded hole is opened at the end of the limiting plate, and a second threaded rod is threadedly connected in the second threaded hole. A second knob is fixed at the top of the second threaded rod, and a pressure plate for pressing down the metacarpophalangeal joint is rotatably connected at the bottom of the second threaded rod.
[0010] Furthermore, the clamping plate has an arc-shaped structure.
[0011] Furthermore, a silicone layer is provided at the bottom of the clamping plate.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] This invention uses a fixing component to fix the support plate on the operating table. The patient's hand is placed in the receiving groove. After the airbag inflates, the hand is restricted. The moving component drives the amputation fixation tube to move to the amputation point. The limiting component fixes the amputation point through the amputation fixation tube, which can effectively fix the amputation point and ensure the stability of the amputation point during replantation surgery. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 for Figure 1 Top view;
[0016] Figure 3 This is a perspective view of the present utility model;
[0017] Figure 4 This is an exploded view of the present invention;
[0018] The components in the diagram are named as follows: 1. Fixing frame; 2. Connecting plate; 3. Fixing plate; 4. Support rod; 5. Support plate; 6. Severed finger fixing cylinder; 7. Limiting plate; 8. Second knob; 9. Second threaded rod; 10. Pressure plate; 11. First threaded rod; 12. Clamping plate; 13. Airbag; 14. Collection basin; 15. Fixing assembly; 16. Receiving groove; 17. Limiting frame; 18. Connecting column; 19. Screw; 20. Universal ball bearing. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
[0020] Example
[0021] The finger replantation fixation device described in this embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes a fixation frame 1, a fixation assembly 15 for fixing it to the operating table below the fixation frame 1, a support plate 5 for placing the hand on the fixation frame 1, a receiving groove 16 for placing the hand on the top of the support plate 5, the receiving groove 16 extending to the rear side wall of the support plate 5, an airbag 13 for restricting finger displacement inside the receiving groove 16, a fixing plate 3 on the rear side wall of the support plate 5, the bottom of the fixing plate 3 being connected to the bottom of the support plate 5 via a connecting plate 2, a severed finger fixing cylinder 6 for the severed finger to pass through on the top of the fixing plate 3, a limiting assembly for restricting the displacement of the severed finger on the severed finger fixing cylinder 6, an arc-shaped sliding groove on the top of the fixing plate 3, and a moving assembly that moves within the sliding groove at the bottom of the severed finger fixing cylinder 6;
[0022] A fixing component 15 is provided below the fixing frame 1. The fixing component 15 can be a gripper, which fixes the fixing frame 1 to the operating table. The fixing component 15 may also include an "L"-shaped mounting plate. A third threaded hole is opened on the horizontal plate of the mounting plate. A third threaded rod is threaded into the third threaded hole. A pressing plate is rotatably connected to the top of the third threaded rod. The pressing plate is rotatably connected to the third threaded rod through a bearing. A rotating plate is welded or glued to the bottom of the third threaded rod. In use, the vertical plate of the mounting plate is attached to the side wall of the operating table, and the horizontal plate of the mounting plate is located below the operating table. Rotating the rotating plate causes the third threaded rod to rotate in the third threaded hole, thereby causing the pressing plate to move closer to the bottom of the operating table until it firmly abuts against the bottom of the operating table, thus fixing the fixing frame 1 to the operating table; and the support plate A collection basin 14 is provided below the support plate 5. The top of the vertical plate of the mounting plate of the fixing component 15 is welded or glued to the bottom of the collection basin 14. The bottom of the collection basin 14 is attached to the top of the operating table. A fixing frame 1 is welded or glued inside the collection basin 14. The collection basin 14 is located below the support plate 5. When the hand is placed on the support plate 5 for finger replantation surgery, the collection basin 14, located below the support plate 5, can collect blood, irrigation fluid and other liquids generated during the operation, avoiding these liquids from contaminating the surgical area or the surrounding environment and reducing the risk of infection. Finger replantation requires thorough debridement. The collection basin 14 can effectively collect necrotic tissue, foreign objects and other debris removed during debridement, maintain a clear surgical field and improve debridement efficiency. The wound needs to be frequently irrigated during the operation. The collection basin 14 can collect the liquid in time to avoid the accumulation of liquid affecting delicate operations such as vascular and nerve anastomosis under the microscope.
[0023] The support plate 5 has a receiving groove 16 at its top. The receiving groove 16 includes six finger slots and slots for placing fingers and arms. Both the patient's left and right hands can be placed in the receiving groove 16 without needing to distinguish between left and right. Regardless of whether the patient's left or right hand has severed fingers, the hand can be placed in the receiving groove 16. After the hand is placed in the receiving groove 16, the fingers extend from the rear wall of the support plate 5, facilitating replantation of the severed fingers. Placing the hand in the receiving groove 16 reduces intraoperative shaking, providing a stable operating platform for vascular and nerve anastomosis under a microscope, and reducing the risk of anastomosis failure due to displacement. Furthermore, the bottom of the receiving groove 16 is inclined, with the height gradually decreasing from front to back, facilitating the flow of irrigation fluid or blood from the receiving groove 16 into the collection basin 14, preventing it from accumulating in the receiving groove 16 and obstructing the surgeon's view. An airbag 13 is attached to the inner wall of the receiving groove 16.
[0024] The airbag 13 expands after inflation, clamping the patient's palm and fingers to prevent them from moving or wobbling within the receiving groove 16. The degree of fixation can be adjusted by controlling the inflation volume of the airbag 13, allowing it to fix hands of different diameters. An inflation port with a sealing plug is located on the outer wall of the airbag 13. Inflation or deflation is achieved through this port. A small air pump's air supply tube can be connected to the inflation port to inflate the airbag 13. The sealing plug is then inserted into the inflation port to prevent leakage. After inflation, the airbag 13 adapts to the hand's contour, preventing excessive local pressure that could cause tissue ischemia or nerve compression. During finger replantation surgery, the pressure of the airbag 13 can be adjusted as needed to ensure fixation stability while achieving a balance between hemostasis and blood circulation restoration.
[0025] A fixing plate 3 is provided on the rear side wall of the support plate 5. The fixing plate 3 and the support plate 5 are connected by a connecting plate 2. The connecting plate 2 has a "U" shaped structure and is located at the bottom of the fixing plate 3 and the support plate 5, so that there is a certain gap between the fixing plate 3 and the support plate 5. A finger fixation cylinder 6 is provided on the top of the fixing plate 3. A limiting component is provided on the finger fixation cylinder 6. The limiting component can be a ring-shaped airbag. The ring-shaped airbag is attached to the inner wall of the finger fixation cylinder 6. It expands by inflating the ring-shaped airbag. After the ring-shaped airbag expands, it can fit the curved surface of the finger 360° to better fix the finger. The pressure of the ring-shaped airbag can be adjusted in real time during the operation to ensure the stability of the finger and avoid excessive compression affecting blood revascularization. The limiting component may also include a first threaded hole opened on the top of the finger fixation cylinder 6. A first threaded rod 11 is threadedly connected to the first threaded hole. A first knob is fixed on the top of the first threaded rod 11, and a clamping plate 12 is rotatably connected to the bottom of the first threaded rod 11.
[0026] A first threaded rod 11 is threaded into a first threaded hole at the top of the finger fixation cylinder 6. A first knob is welded or glued to the top of the first threaded rod 11. A clamping plate 12 is rotatably connected to the bottom of the first threaded rod 11 via a bearing. In use, the severed finger is inserted into the finger fixation cylinder 6, and then the first knob is rotated to move the first threaded rod 11 within the first threaded hole, thereby moving the clamping plate 12 closer to the severed finger and clamping and fixing it. The clamping plate 12 has an arc-shaped structure. The shape of the finger itself has a certain curvature. The arc-shaped clamping plate 12 can better fit the natural shape of the finger and provide a more stable fixation effect. The arc-shaped clamping plate 12 can better disperse stress, reduce pressure on the severed finger, and avoid excessive pressure on the severed finger caused by a single force point. In addition, a silicone layer is provided at the bottom of the clamping plate 12. The silicone layer has soft and elastic properties, which can better fit the severed finger and reduce the pressure on the finger. The arc-shaped design combined with the silicone layer can evenly distribute the clamping force. The silicone layer can buffer external impact and protect the severed finger from secondary damage.
[0027] The bottom of the finger fixation cylinder 6 is equipped with a movable component, which includes a slider located in a groove. A spring plunger is provided on the side wall of the slider. Corresponding to the spring plunger, six slots are opened on the inner wall of the groove, which are mutually engaged. The slots correspond to the six finger slots of the receiving groove 16. The top of the slider is welded or glued to the bottom of the finger fixation cylinder 6. In use, the finger fixation cylinder 6 is moved to move the slider in the groove. If the patient's severed finger is the thumb, the finger fixation cylinder 6 is moved to the thumb position, and the spring plunger engages with the slots, thereby fixing the position of the slider and the finger fixation cylinder 6. Then, the severed finger is inserted into the finger fixation cylinder 6, and the limiting component is used to fix the severed finger. The doctor performs replantation of the severed finger. There is a certain gap between the fixation plate 3 and the support plate 5 to facilitate the connection and fixation of the replanted finger.
[0028] The moving component also includes an "n"-shaped limiting frame 17 that is clamped onto the fixed plate 3. The bottom of the limiting frame 17 has universal ball bearings 20 that slide within a groove. The limiting frame 17 is connected to the severed finger fixing cylinder 6 via a connecting post 18. A threaded hole is provided on the side wall of the limiting frame 17, and a screw 19 is threaded into the threaded hole. The tightening end of the screw 19 abuts against the side wall of the fixed plate 3. The fixed plate 3 has an arc-shaped structure, and the limiting frame 17 is clamped onto it. The bottom of the horizontal plate of the limiting frame 17 contacts the top of the support rod 4. The inner walls of the two vertical plates distributed on the left and right sides of the limiting frame 17 are respectively attached to the left and right side walls of the fixed plate 3. Universal ball bearings 20 are welded or glued to the bottom of the limiting frame 17. The ball bearings of the universal ball bearing 20 roll in the groove. A connecting column 18 is welded or glued to the top of the limiting frame 17. The top of the connecting column 18 is welded or glued to the bottom of the finger fixation cylinder 6. A threaded hole is opened on the vertical plate on the outer side of the limiting frame 17. A screw 19 is threaded into the threaded hole. When in use, loosen the screw 19 so that its tightening end is released from the restraint on the side wall of the fixing plate 3. Then move the finger fixation cylinder 6. Under the sliding cooperation of the ball bearings of the universal ball bearing 20 and the groove, the connecting column 18 is moved, which in turn moves the finger fixation cylinder 6 on the fixing plate 3. Move it to the corresponding finger of the patient, and then fix the finger in the finger fixation cylinder 6. The doctor can then replant the finger.
[0029] This embodiment further illustrates the technology. A support rod 4 is vertically mounted on the top of the fixing frame 1. A limiting plate 7 is mounted on the top of the support rod 4. A second threaded hole, communicating vertically, is opened at the end of the limiting plate 7. A second threaded rod 9 is threadedly connected to the second threaded hole. A second knob 8 is fixed to the top of the second threaded rod 9, and a pressure plate 10 for pressing down on the metacarpophalangeal joint is rotatably connected to the bottom of the second threaded rod 9. The support rod 4 is welded or glued to the top of the fixing frame 1. A limiting plate 7 is welded or glued to the top of the support rod 4. The second threaded hole on the limiting plate 7 is threadedly connected to the second threaded rod 9. The top of the second threaded rod 9 is welded or glued... There is a second knob 8, and the bottom of the second threaded rod 9 is rotatably connected to the pressure plate 10 via a bearing. In use, rotating the second knob 8 causes the second threaded rod 9 to move within the second threaded hole, bringing the pressure plate 10 closer to the back of the patient's hand placed in the receiving groove 16. The pressure plate 10 presses the back of the patient's hand downward, extending the fingers. Each finger corresponds to a finger groove in the receiving groove 16. In finger replantation surgery, this can reduce intraoperative finger displacement and provide a static operating environment for vascular anastomosis under a microscope. The pressure plate 10 is made of breathable material, and distal blood supply is checked every hour (capillary filling test) to prevent excessive compression from causing venous return obstruction.
[0030] In actual use, the support plate 5 is fixed to the operating table by the fixing component. The patient's hand is placed in the receiving groove 16 at the top of the support plate 5. Then, the air pump inflates the airbag 13 to clamp and fix the hand. Then, the moving component moves the finger fixation cylinder 6 in the sliding groove at the top of the fixing plate 3. The finger fixation cylinder 6 moves to the finger amputation site, and the finger is inserted into the finger fixation cylinder 6. The limiting component fixes the finger, ensuring that the hand and the finger are fixed stably, ensuring that the bone, tendon and other structures are connected in the optimal functional position, reducing the probability of deformed healing in the later stage, and achieving precise finger connection.
Claims
1. A fixation device for replanting a severed finger, comprising a fixation frame (1), a fixation component (15) for fixing the finger to an operating table is disposed below the fixation frame (1), and a support plate (5) for placing the hand is disposed on the fixation frame (1), characterized in that: The top of the support plate (5) is provided with a receiving groove (16) for inserting a hand. The receiving groove (16) extends through to the rear side wall of the support plate (5). An airbag (13) restricts finger displacement inside the receiving groove (16). A fixing plate (3) is provided on the rear side wall of the support plate (5). The bottom of the fixing plate (3) is connected to the bottom of the support plate (5) through a connecting plate (2). The top of the fixing plate (3) is provided with a severed finger fixing cylinder (6) for the severed finger to pass through. A limiting component restricting the displacement of the severed finger is provided on the severed finger fixing cylinder (6). The top of the fixing plate (3) is provided with an arc-shaped sliding groove. The bottom of the severed finger fixing cylinder (6) is provided with a moving component that moves within the sliding groove.
2. The finger replantation fixation device according to claim 1, characterized in that: The movable component includes a limiting frame (17) with an "n" shaped structure that is clamped on the fixed plate (3). The bottom of the limiting frame (17) is provided with universal ball bearings (20) that slide in the groove. The limiting frame (17) is connected to the finger fixing cylinder (6) through a connecting column (18). The side wall of the limiting frame (17) is provided with a threaded hole, and a screw (19) is threaded into the threaded hole. The tightening end of the screw (19) is pressed against the side wall of the fixed plate (3).
3. The finger replantation fixation device according to claim 1, characterized in that: A collection basin (14) is provided below the support plate (5).
4. The finger replantation fixation device according to claim 1, characterized in that: The limiting component includes a first threaded hole opened on the top of the severed finger fixing cylinder (6), a first threaded rod (11) is threadedly connected to the first threaded hole, a first knob is fixed on the top of the first threaded rod (11), and a clamping plate (12) is rotatably connected to the bottom of the first threaded rod (11).
5. The finger replantation fixation device according to claim 1, characterized in that: The top of the fixed frame (1) is vertically provided with a support rod (4), and the top of the support rod (4) is provided with a limiting plate (7). The end of the limiting plate (7) is provided with a second threaded hole that is open from top to bottom. A second threaded rod (9) is threadedly connected in the second threaded hole. A second knob (8) is fixed on the top of the second threaded rod (9). A pressure plate (10) for pressing down the metacarpophalangeal joint is rotatably connected to the bottom of the second threaded rod (9).
6. The finger replantation fixation device according to claim 4, characterized in that: The clamping plate (12) has an arc-shaped structure.
7. The finger replantation fixation device according to claim 4, characterized in that: The bottom of the clamping plate (12) is provided with a silicone layer.