Multi-degree of freedom fixation plate for hand surgery

Abstract

The utility model discloses a kind of multi-degree-of-freedom fixing plate of hand surgery.The fixing plate is constituted by knuckle fixing system, joint movement auxiliary system and support fixing system.Knuckle fixing system realizes knuckle accurate fixing by knuckle ring, fixed ring and fixed cable;Joint movement auxiliary system is assisted by flexion connecting rod, flexion ring and adduction and abduction ring, and multidirectional movement of finger and metacarpophalangeal joint is assisted;Support fixing system provides stable support by palm ring, wrist band fixed ring, wrist band and forearm handle.The principle is that each system cooperates, meets the accurate positioning of operation to hand and the demand of multi-degree-of-freedom adjustment.The fixing plate has remarkable advantages, not only accurate positioning, flexible adjustment joint, but also can improve operation efficiency and quality, and small in size, easy to use.Meanwhile, it uses medical grade material, pays attention to comfort and safety design, can adapt to different patients and operation demand, widely used in hand surgery and postoperative rehabilitation stage.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a multi-degree-of-freedom fixation plate for hand surgery. It is suitable for precise positioning and fixation of the patient's hand during hand surgery, assisting in delicate surgical operations such as fracture reduction and fixation, tendon repair, and joint replacement. It can also be applied in the postoperative hand rehabilitation stage to provide support and assistance for the functional recovery of hand joints. Background Technology

[0002] Hand surgery, due to its involvement of the delicate anatomical structures of the hand, demands extremely high precision in positioning and manipulation during the procedure. However, traditional hand surgery faces numerous challenges in practice. First, the extremely limited operating space within the hand makes it difficult for surgical assistants to provide effective support. During surgery, the first assistant often needs to immobilize one hand to free up the other for other auxiliary tasks, but this not only increases the difficulty for the assistant but also makes it difficult to ensure the stability and accuracy of the immobilization. The second assistant, due to a limited surgical field of vision, is unable to provide effective assistance, thus affecting the overall efficiency and quality of the surgery.

[0003] Secondly, hand surgery involves a large volume of procedures, with a significant proportion performed at night. During nighttime surgeries, factors such as the surgical environment and the condition of medical staff further increase the difficulty of the surgery, placing higher demands on the ease of use and stability of surgical aids. Traditional surgical aids are often insufficient to meet the requirements of such high-intensity, high-demand surgical environments.

[0004] Furthermore, multiple function reconstruction surgeries require special fixation of the hand to ensure the smooth progress of the procedure and the recovery of hand function postoperatively. However, existing fixation methods often lack flexibility and precision, and cannot be effectively adjusted according to the specific condition of each patient's hand and the needs of the surgery.

[0005] Our team's previous hand surgery treadmill also had certain shortcomings. The treadmill was large and had many assembly parts, which not only increased surgical preparation time and operational complexity in actual use, but also hindered rapid adjustments and precise positioning during surgery. Therefore, to meet the growing needs of hand surgery, there is an urgent need to design a smaller, more user-friendly multi-degree-of-freedom fixation plate for hand surgery to address the problems of traditional surgical aids. Utility Model Content

[0006] The present invention aims to solve the above-mentioned technical problems by providing a multi-degree-of-freedom fixation plate for hand surgery.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a multi-degree-of-freedom fixation plate for hand surgery, comprising:

[0008] The knuckle fixation system includes multiple knuckle rings, a knuckle fixing ring, and a knuckle fixing cable. The knuckle rings are fitted onto each knuckle of the finger and have a movable guide structure. The knuckle fixing rings cooperate with the knuckle rings to form an adjustable fixation device. The knuckle fixing cable passes through the fixing ring and has a length adjustment range of 0-5cm.

[0009] A joint motion assist system includes at least one set of phalangeal ring flexion-extension connecting rods, metacarpophalangeal joint flexion rings, and metacarpophalangeal joint adduction-abduction rings. The flexion-extension connecting rods are adjustable to connect adjacent phalangeal rings and have a ±30° angle adjustment function.

[0010] The support and fixation system includes a palm ring, a wristband fixing ring, a wristband, and a forearm handle. The palm ring is connected to the wristband and forearm handle via a detachable connection structure. The forearm handle is provided with an anti-slip rubber coating and has an adjustable length of 20-25cm.

[0011] In addition, the hand surgery multi-degree-of-freedom fixation plate proposed above according to this utility model may also have the following additional technical features:

[0012] The knuckle ring is made of medical-grade ABS plastic and has an open ring structure with an inner diameter of 3-8mm. Its inner surface is provided with a flexible buffer layer, and its outer surface is provided with multiple equidistant connection interfaces.

[0013] Furthermore, the knuckle ring extension connecting rod includes an aluminum alloy body and a bidirectional adjustment mechanism, with a length adjustment range of 5-12cm. Both ends are equipped with universal ball joint connectors, which can realize three-dimensional angle adjustment between adjacent knuckle rings.

[0014] Furthermore, the metacarpophalangeal joint flexion ring is an arc-shaped strip structure made of flexible silicone material, with an anatomically raised guide surface on its inner side and a tension display scale integrated on its outer side, and the maximum flexion assist angle can reach 90°.

[0015] Furthermore, the palm ring is made of carbon fiber composite material and includes a palm opening and a palm edge fitting part. The palm opening is 3-5cm wide and has a pressure dispersion structure on the edge. The palm edge fitting part has multiple modular connection ports.

[0016] Furthermore, the forearm handle includes an arc-shaped support plate and an adjustable strap assembly. The inner surface of the support plate is provided with a biomimetic curved surface and a pressure sensor array, while the outer surface integrates angle indicator scales and accessory mounting rails.

[0017] Furthermore, the wristband fixing ring is made of titanium alloy with a non-slip surface, and has a C-shaped opening structure with an inner diameter of 2-3cm. It has three equally distributed elastic limiting protrusions on its inner side and a knob-type tension adjuster with scale display on its outer side.

[0018] Furthermore, the wristband has a multi-layer composite structure, including an antibacterial and skin-friendly layer that contacts the skin, an intermediate elastic support layer, and an outer Velcro fastening surface. It is 3cm wide and has matrix-style ventilation holes, and its length can be adjusted from 20 to 30cm. It also has a visual tension indicator strip.

[0019] The advantages of this utility model compared with the prior art are as follows:

[0020] 1. Through the coordinated operation of the finger fixation system, joint movement assist system, and support fixation system, precise positioning of various joints in the hand can be achieved, enabling multi-degree-of-freedom adjustment. Whether it's finger flexion and extension, metacarpophalangeal joint flexion, adduction, or abduction, movements can be precisely adjusted according to surgical needs, greatly facilitating surgical procedures and contributing to improved accuracy and success rates.

[0021] 2. This invention solves the problems of limited assistant support and small operating space in traditional surgery. The fixation plate stably secures the hand, reducing the need for frequent adjustments by assistants due to insecure fixation. This allows the surgical team to focus more on the surgical procedure, thereby improving efficiency. Simultaneously, precise positioning and multi-degree-of-freedom adjustment also contribute to improved surgical quality and reduced surgical risks.

[0022] 3. Compared to the hand surgery treadmill previously designed by our team, this invention reduces the size and the number of assembly parts. During the surgical preparation phase, medical staff can more quickly assemble and wear the fixation plate; during the surgery, it also facilitates rapid adjustments and operations, improving the ease of use of the equipment and meeting the needs for efficient use of the equipment in situations with a large volume of hand surgeries and frequent night surgeries.

[0023] 4. The flexible buffer layer on the inner surface of the knuckle ring, the multi-layered composite structure of the wristband, and the pressure-dispersing structure of the palm ring are all designed with patient comfort in mind, reducing pressure on the skin and nerves / blood vessels. Meanwhile, all components are made of medical-grade materials, ensuring safety and reducing the risk of infection for patients. Furthermore, the anti-slip design of the wristband fixing ring and the anti-slip rubber coating on the forearm handle also improve the overall stability and safety of the fixation plate.

[0024] 5. The size and adjustment range of each component can be adapted to the size and shape of different patients' hands, as well as the needs of different surgeries. For example, the multiple inner diameter sizes of the knuckle ring and the adjustable length of the forearm handle enable it to be widely used in hand surgery for patients of different ages and body types, demonstrating strong versatility and adaptability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the multi-degree-of-freedom fixation plate for hand surgery of this utility model.

[0026] Figure 2 This is a side view of the multi-degree-of-freedom fixation plate for hand surgery of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the multi-degree-of-freedom fixation plate for hand surgery of this utility model.

[0028] As shown in the figure: 1. Knuckle fixation cable; 2. Knuckle ring; 3. Knuckle fixation ring; 4. Knuckle ring flexion-extension connecting rod; 5. Metacarpophalangeal joint flexion ring; 6. Metacarpophalangeal joint adduction-abduction ring; 7. Palm ring; 8. Wristband fixation ring; 9. Wristband; 10. Forearm handle. Detailed Implementation

[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.

[0031] I. Working principle of this utility model:

[0032] The multi-degree-of-freedom fixation plate for hand surgery provided by this utility model achieves precise positioning and multi-degree-of-freedom adjustment of various joints of the hand through the coordinated work of a joint fixation system, a joint movement assist system, and a support fixation system, as detailed below:

[0033] Knuckle Fixation System: This system comprises multiple knuckle rings, knuckle fixation rings, and knuckle fixation cables. The knuckle rings are made of medical-grade ABS plastic with an open-loop structure and an inner diameter of 3-8mm. This design accommodates the diameters of different finger phalanges in various patients. The inner surface of the knuckle ring has a flexible cushioning layer, effectively reducing pressure and friction on the skin and improving patient comfort. The outer surface has multiple equidistant connection interfaces for easy connection with other components. The knuckle fixation rings work together to form an adjustable fixation device. Its open structure allows for quick assembly and disassembly, enabling rapid fixation of specific phalanges according to surgical needs, limiting excessive movement, and maintaining the anatomical position of the fingers. The knuckle fixation cables are made of elastic nylon, threaded through the fixation rings, and have a length adjustment range of 0-5cm. By adjusting the length of the fixation cable, each finger phalanx can be precisely fixed, effectively limiting abnormal movement during surgery and ensuring phalanx stability.

[0034] Joint movement assistance system: Includes at least one set of phalanx ring flexion-extension connecting rods, metacarpophalangeal joint flexion rings, and metacarpophalangeal joint adduction-abduction rings. The phalanx ring flexion-extension connecting rods consist of an aluminum alloy body and a bidirectional adjustment mechanism, with a length adjustment range of 5-12cm. Both ends are equipped with universal ball joint connectors, enabling three-dimensional angle adjustment between adjacent phalanx rings, with a ±30° angle adjustment function. By adjusting the length and angle of the connecting rods, finger flexion and extension movements can be assisted, adapting to different finger ranges of motion and meeting the operational needs of different finger angles during surgery. The metacarpophalangeal joint flexion ring is a flexible silicone arc-shaped strip structure with an anatomically raised guide surface on its inner side, conforming to the palmar side of the metacarpophalangeal joint to guide flexion movements. The outer side integrates a tension display scale, with a maximum flexion assistance angle of up to 90°, allowing medical staff to monitor the degree of joint flexion in real time. The metacarpophalangeal joint adduction and abduction ring is made of medical-grade polypropylene with an open structure on the outside. It can assist the metacarpophalangeal joint in adduction (0-20°) / abduction (0-30°) movements, effectively improving joint mobility and providing more flexible joint adjustment space for surgical operations.

[0035] Support and Fixation System: Includes a palm ring, wristband retaining ring, wristband, and forearm handle. The palm ring is made of carbon fiber composite material and includes a palm opening and a palm edge fitting area. The palm opening is 3-5cm wide and has a pressure-dispersing structure at the edge to avoid compression of nerves and blood vessels in the palm. The palm edge fitting area has multiple modular connection ports for easy connection with finger and wrist components, serving as the basic support structure for the palm. The wristband retaining ring is made of titanium alloy with a non-slip surface and has a C-shaped opening structure with an inner diameter of 2-3cm. Its inner side has three equally distributed elastic limiting protrusions, and its outer side has a rotary tension adjuster with a scale display to fix the wristband position and ensure that the wristband does not shift during adjustment. The wristband features a multi-layered composite structure, including an antibacterial, skin-friendly layer in contact with the skin, a middle elastic support layer, and an outer Velcro fastening surface. It is 3cm wide and has a matrix of ventilation holes. The length is adjustable from 20-30cm and includes a visual tension indicator. The Velcro allows for even pressure distribution across the wrist, ensuring both comfort and breathability. The forearm handle comprises an arc-shaped support plate and an adjustable strap assembly. The inner surface of the support plate features a biomimetic curved surface and a pressure sensor array, conforming to the outer forearm for comfortable support. The outer surface integrates angle indicators and accessory mounting rails, offering a 20-25cm adjustable length to accommodate different forearm circumferences and providing stable support for the entire mounting plate.

[0036] II. Implementation Method:

[0037] Preparation before wearing

[0038] The patient's hands and forearm skin are disinfected to ensure the skin surface is dry and free of dirt, thus reducing the risk of postoperative infection. The entire multi-degree-of-freedom fixation plate for hand surgery is carefully inspected for damage and for secure and reliable connections between components. For example, check for broken knuckle fixation cables and the flexibility of the adjustment mechanism of the knuckle ring flexion-extension connecting rod.

[0039] Wearing a wrist strap and forearm handle

[0040] Thread the wristband through the wristband retaining loop and wrap it around the patient's wrist. Adjust the tightness of the wristband to allow for the insertion of 1-2 fingers, ensuring it is neither too tight to affect blood circulation nor too loose to cause the retainer to shift, thus guaranteeing comfort and stability. Place the forearm handle on the outside of the patient's forearm, ensuring a close fit between the forearm handle and the wristband retaining loop. Adjust the position of the forearm handle so that it is located in the middle of the forearm. The length of the forearm handle can be adjusted (adjustable within 20-25cm) to better fit different patients' forearm circumferences.

[0041] Install wristband

[0042] Place the palm ring on the patient's palm, aligning the opening of the ring with the base of the hand. Adjust the position of the palm ring to ensure it fits snugly against the palm, taking care to avoid compressing the nerves and blood vessels in the hand.

[0043] The palm ring is securely fixed via a connecting component between the palm ring and the wristband or forearm handle. Utilizing modular connection ports on the palm edge of the palm ring, it reliably connects to the wristband and forearm handle, forming a stable palm support structure.

[0044] Wearing knuckle rings and retaining rings

[0045] Based on the position of each phalanx of the patient's fingers, the knuckle rings are sequentially placed on the phalanxes of the thumb, index finger, middle finger, ring finger, and little finger (including the proximal, middle, and distal phalanxes). Because the knuckle rings use an open-loop structure with an inner diameter of 3-8mm, they can be selected and worn according to the diameter of different phalanxes, ensuring a comfortable fit. For phalanxes requiring fixation, a knuckle retainer ring is used. Adjust the position of the knuckle rings and retainer rings to ensure a tight fit, but carefully observe the blood circulation in the fingers to avoid ischemia due to excessive tightness. The combination of the knuckle retainer ring and the knuckle rings restricts excessive movement of specific phalanxes, maintaining the anatomical position of the fingers.

[0046] Connecting the extension and bending rod and the fixing cable

[0047] Connect the two ends of the knuckle ring flexion-extension connecting rod to the knuckle rings of adjacent phalanges. Adjust the length (adjustment range 5-12cm) and angle (±30° angle adjustment function) of the connecting rod according to the specific needs of finger flexion-extension movements during surgery to ensure smooth finger flexion-extension movements and provide a suitable range of joint motion for the surgical procedure. Pass the knuckle fixation cable through the fixation hole on the knuckle fixation ring and adjust its tension by adjusting the length (0-5cm length adjustment range) to keep the knuckle in the required position and effectively limit abnormal knuckle movement.

[0048] Adjusting metacarpophalangeal joint components

[0049] For the metacarpophalangeal joint flexion ring, it is placed around the palmar side of the joint according to the surgical requirements. The tightness is adjusted by observing the tension scale on the lateral side of the ring to guide flexion movements, achieving a maximum 90° of assisted flexion. For the metacarpophalangeal joint adduction and abduction ring, it is placed on the lateral side of the joint. The position and tightness of the ring are adjusted according to surgical needs to assist the joint in adduction (0-20°) and abduction (0-30°) movements, improving joint mobility.

[0050] Overall inspection

[0051] After completing all the above steps, a comprehensive inspection of the entire hand surgical multi-degree-of-freedom fixation plate is performed. This includes checking that all components are installed correctly and securely, such as ensuring the stability of the flexion-extension connecting rods of the finger rings and the reliable connection between the palm rings and other components. Simultaneously, the tightness of each component is checked to ensure it is appropriate and that there are no instances of jamming or compression of the patient's skin, nerves, or blood vessels. If necessary, the position and tightness of each component are readjusted to ensure the fixation plate functions stably, safely, and effectively during the surgery.

[0052] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-degree-of-freedom fixation plate for hand surgery, characterized in that: include: A knuckle fixation system includes multiple knuckle rings (2), knuckle fixing rings (3), and knuckle fixing cables (1). The knuckle rings (2) are fitted onto each knuckle of the fingers and have a movable guide structure. The knuckle fixing rings (3) cooperate with the knuckle rings (2) to form an adjustable fixation device. The knuckle fixing cables (1) pass through the knuckle fixing rings (3) and have a length adjustment range of 0-5cm. The joint motion assist system includes at least one set of phalangeal ring flexion-extension connecting rods (4), metacarpophalangeal joint flexion rings (5) and metacarpophalangeal joint adduction-abduction rings (6). The phalangeal ring flexion-extension connecting rods (4) are adjustable to connect adjacent phalangeal rings (2) and have a ±30° angle adjustment function. The support and fixation system includes a palm ring (7), a wristband fixing ring (8), a wristband (9), and a forearm handle (10). The palm ring (7) is connected to the wristband (9) and the forearm handle (10) through a detachable connection structure. The forearm handle (10) is provided with an anti-slip rubber coating and has an adjustable length of 20-25cm.

2. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The knuckle ring (2) is made of medical-grade ABS plastic and has an open ring structure with an inner diameter of 3-8mm. Its inner surface is provided with a flexible buffer layer and its outer surface is provided with multiple equidistant connection interfaces.

3. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The knuckle ring extension connecting rod (4) includes an aluminum alloy body and a two-way adjustment mechanism. The length adjustment range is 5-12cm. Both ends are equipped with universal ball joint connectors, which can realize three-dimensional angle adjustment between adjacent knuckle rings (2).

4. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The metacarpophalangeal joint flexion ring (5) is an arc-shaped strip structure made of flexible silicone material. Its inner side is provided with an anatomical protrusion guide surface, and its outer side is integrated with a tension display scale. The maximum flexion auxiliary angle can reach 90°.

5. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The palm ring (7) is made of carbon fiber composite material and includes a palm opening and a palm edge fitting part. The palm opening is 3-5cm wide and has a pressure dispersion structure on the edge. The palm edge fitting part has multiple modular connection ports.

6. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The forearm handle (10) includes an arc-shaped support plate and an adjustable strap assembly. The inner surface of the support plate is provided with a biomimetic curved surface and a pressure sensor array, and the outer surface is integrated with an angle indicator scale and an accessory mounting rail.

7. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The wristband fixing ring (8) is made of titanium alloy with anti-slip surface treatment, with a C-shaped opening structure with an inner diameter of 2-3cm. It has three equally distributed elastic limiting protrusions on its inner side and a knob-type tension adjuster with scale display on its outer side.

8. The hand surgery multi-degree-of-freedom fixation plate according to claim 1, characterized in that: The wristband (9) has a multi-layer composite structure, including an antibacterial skin-friendly layer that contacts the skin, an intermediate elastic support layer, and an outer Velcro fixing surface. It is 3cm wide and has matrix-style ventilation holes. The length can be adjusted from 20 to 30cm and is equipped with a visual tension indicator strip.

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