用于膝关节置换手术的膝关节屈曲保持装置
By designing an adjustable knee flexion retention device, the problem of insufficient flexibility of existing devices is solved, achieving stable fixation and angle adjustment of the knee joint, thereby improving surgical precision and patient rehabilitation quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN INNOVATION BIOTECHNOLOGY RES INST CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing knee joint fixation devices are not flexible enough in knee replacement surgery, making it difficult to make fine-tuning of the angle, which can lead to unexpected displacement of the knee joint during surgery, affecting the accuracy of osteotomy and the quality of postoperative rehabilitation for patients.
A knee flexion retention device was designed, comprising a placement plate, a clamping mechanism, a fixing plate, a support rod, and a positioning groove. Through the cooperation of the adjustable fixing plate and the support rod, the knee joint is stably fixed and adapted to patients with different leg lengths. It has angle adjustment and position adjustment functions.
It improves the stability and flexibility of the knee joint during knee replacement surgery, reduces the risk of knee joint displacement during surgery, and improves the precision of osteotomy and the postoperative rehabilitation effect for patients.
Smart Images
Figure CN224505816U_ABST
Abstract
Claims
1. A knee flexion holding device for knee replacement surgery, characterized by: The device includes a placement plate (1), the bottom of which is detachably connected to a clamping mechanism for fixing the placement plate (1). The upper surface of the placement plate (1) is provided with a fixing plate (2) whose position is adjustable along the length of the placement plate (1). One side of the fixing plate (2) is provided with a fixing strap (3) for fixing the patient's foot. The other side of the upper surface of the placement plate (1) is fixedly connected to a support rod (4). The surface of the support rod (4) is provided with an auxiliary mechanism for supporting the patient's leg. The upper surface of the placement plate (1) is provided with a positioning groove (5) and a limiting groove (6) along the length direction. The fixing plate (2) is guided and slidably connected to the limiting groove (6). A positioning mechanism is provided on one side of the fixing plate (2) to fix the position of the fixing plate (2).
2. The knee flexion holding device for knee replacement surgery according to claim 1, characterized by: The clamping mechanism includes a clamping plate (7) and a clamping screw (8). The clamping plate (7) is detachably disposed on the lower surface of the placement plate (1), and the clamping screw (8) is threadedly connected to the bottom of the clamping plate (7).
3. The knee flexion hold-in device for knee replacement surgery according to claim 2, characterized by: The lower surface of the placement plate (1) is fixedly connected to a T-shaped block (9) extending in the width direction, and the upper surface of the clamping plate (7) is provided with a T-shaped groove (10) that matches the T-shaped block (9). The T-shaped block (9) and the T-shaped groove (10) are slidably guided together.
4. The knee flexion retention device for knee replacement surgery according to any one of claims 1-3, characterized in that: The auxiliary mechanism includes a slider (11) and a support frame (12). The slider (11) is slidably sleeved on the outer surface of the support rod (4), and the support frame (12) is rotatably connected to one side of the slider (11) via a rotating shaft.
5. The knee flexion hold-in device for knee replacement surgery according to claim 4, characterized by: The support rod (4) has guide grooves (13) extending in the vertical direction on both sides. Multiple fixing grooves (14) are provided on one side of the guide groove (13). The fixing grooves (14) are connected to the guide grooves (13). The fixing grooves (14) include a groove section with the opening facing upward. The inner wall of the slider (11) is fixedly connected to a guide post (15). The guide post (15) is slidably adapted to the guide groove (13) and the fixing groove (14) respectively. The guide post (15) can be supported on the bottom of the groove section with the opening facing upward in the fixing groove (14).
6. The knee flexion hold-in orthosis for knee replacement surgery according to any one of claims 1-3, characterized in that: The positioning mechanism includes a positioning buckle (16), a movable buckle (17), and an operating rod (18). The positioning buckle (16) is fixedly connected to the inner wall of the positioning groove (5). The movable buckle (17) is slidably connected to the inside of the fixed plate (2). The movable buckle (17) moves in the width direction of the placement plate (1). When the movable buckle (17) moves away from the limiting groove (6), the movable buckle (17) engages with the positioning buckle (16). When the movable buckle (17) moves towards the limiting groove (6), the movable buckle (17) disengages from the positioning buckle (16). The operating rod (18) is fixedly connected to the top of the movable buckle (17) and extends from one side of the fixed plate (2) to the outside. The position of the operating rod (18) is adjustable along the width direction of the placement plate (1).
7. The knee flexion hold-in device for knee replacement surgery according to claim 6, characterized by: The fixing plate (2) is fixedly connected to a positioning rod (19), and the operating rod (18) has an opening that matches the positioning rod (19). The positioning rod (19) and the operating rod (18) are slidably guided together.
8. The knee flexion retention device for knee replacement surgery according to any one of claims 1-3, characterized in that: The upper surface of the fixing plate (2) is provided with a replacement pad (20), and pressure strips (21) are detachably connected to both sides of the fixing plate (2) to fix the replacement pad (20).