Arm binding device for hemodialysis in nephrology department
By designing an arm restraint device for hemodialysis in nephrology that utilizes the arm's own weight to trigger an airway connection mechanism, the problem of traditional restraints being unable to adapt to the physiological curvature of the patient's arm is solved, achieving multi-dimensional stable fixation and ensuring the safety and stability of the dialysis process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-03-10
AI Technical Summary
Traditional restraints cannot effectively restrict the internal rotation, external rotation, and slight bending of the elbow joint, leading to needle displacement, slippage, or damage to the blood vessel wall, increasing patient pain and the workload of medical staff.
A nephrology arm restraint device for hemodialysis was designed. The device utilizes the patient's arm weight to trigger the airway connection mechanism. Through the restraint airbag, joint locking mechanism, and tubing fixation unit, it achieves multi-dimensional stable fixation and adapts to the physiological curvature of the patient's arm.
This method achieves multi-directional stable fixation of the patient's arm, avoiding needle displacement and vascular damage, and improving the stability and safety of the dialysis process.
Smart Images
Figure CN121622338A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of arm restraint devices, and particularly relates to an arm restraint device for hemodialysis in a nephrology department. BACKGROUND
[0002] In hemodialysis treatment in a nephrology department, in order to ensure the smooth progress of blood purification, the patient needs to keep the puncture part of the arm absolutely stable for several hours during the treatment. Any unintentional limb movement, especially the bending of the joint and the trembling of the muscle, can cause the puncture needle to shift, slip or damage the blood vessel wall, and can cause serious consequences such as hematoma and treatment interruption, which not only increases the pain of the patient, but also increases the work burden of the medical staff.
[0003] The traditional restraint belt can only provide a one-way pressure force and cannot effectively limit the internal rotation, eversion and slight bending of the elbow joint of the patient's arm, and the rigid fixing plate cannot adapt to the physiological curvature of the patient's arm. SUMMARY
[0004] In view of the above problems, in order to overcome the defects of the prior art, the application provides an arm restraint device for hemodialysis in a nephrology department, which uses the weight of the patient's arm as the initial power to trigger the air path communication mechanism composed of a moving plate, a driving pipe and a guide spring, realizes the whole process from automatic triggering, self-adaptive fitting to final rigid locking of the restraint device, and cooperatively drives the restraint air bag, the joint locking mechanism and the pipeline fixing unit through a single air source, thereby constructing a multi-dimensional and integrated stable system from the patient's limb to the treatment pipeline, and solving the technical problems that the prior art cannot effectively limit the patient's arm and cannot adapt to the physiological curvature of the patient's arm.
[0005] To solve the above technical problems, the technical scheme adopted by the application is as follows: the arm restraint device for hemodialysis in a nephrology department provided by the application comprises a placing box, the top wall of the placing box is provided with a placing groove, the placing box is hollow, the dynamic telescopic rods are slidably and communicatively arranged on the placing groove in an arc array, the dynamic telescopic rods are hollow, the hollow portions of the dynamic telescopic rods are in communication with the hollow portion of the placing box, a restraint belt is fixedly connected to one side wall of the placing box, a restraint air bag is fixedly and communicatively connected to the restraint belt, the restraint air bag is in communication with the hollow portion of the placing box through an air pipe, fixed boxes are fixedly and communicatively connected to the side walls of the placing box, and the hollow portion of the placing box is in communication with an external air source.
[0006] Preferably, a moving plate is longitudinally and slidably connected to the inner wall of the placing box, the moving plate divides the hollow portion of the placing box into a first cavity and a second cavity, the second cavity is in communication with the hollow portion of the dynamic telescopic rod, and the restraint air bag is in communication with the hollow portion of the second cavity.
[0007] Preferably, a telescopic sleeve is longitudinally slidably connected inside the dynamic telescopic rod. The hollow part of the telescopic sleeve is connected to the second cavity. A first spring is sleeved on the dynamic telescopic rod. The two ends of the first spring are fixedly connected to the top end of the dynamic telescopic rod and the placement groove, respectively. A partition plate is fixedly connected to the inner circumferential wall of the telescopic sleeve. A second spring is provided inside the hollow part of the telescopic sleeve. The two ends of the second spring are fixedly connected to the bottom wall of the partition plate and the bottom end of the dynamic telescopic rod, respectively. A fixing head is ball-jointed to the top end of the telescopic sleeve. A drive tube is coaxially fixedly connected to the bottom end of one of the dynamic telescopic rods. The bottom end of the drive tube is in contact with the top wall of the moving plate. A through groove runs through the drive tube. The hollow part of the dynamic telescopic rod is connected to the second cavity through the through groove.
[0008] Preferably, a hollow cavity is provided between the top wall of the partition plate, the inner circumferential wall of the telescopic sleeve and the ball end of the fixing head, and a friction block is provided in the hollow cavity. The friction block is longitudinally slidably connected to the inner circumferential wall of the telescopic sleeve, and the top end of the friction block is arc-shaped.
[0009] Preferably, the side wall of the placement box is fixedly connected to a connecting pipe, which is connected to an external air source. The bottom wall of the movable plate is fixedly connected to the inner bottom wall of the placement box with a guide spring. The guide spring is initially in an uncompressed state. The guide spring drives the movable plate to be above the connecting pipe. When the moving pipe drives the movable plate to move below the connecting pipe, the connecting pipe is connected to the second cavity.
[0010] Preferably, the fixing box is provided with a fixing groove, and fixing airbags are fixedly connected in a ring array on the circumferential wall of the fixing groove. The fixing airbags are fixedly connected to the hollow part of the fixing box.
[0011] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Utilizing the dynamic fixation triggered by the arm's own weight, high-pressure air is automatically injected into the restraint airbag. The pressure generated by the expansion of the restraint airbag presses on the patient's upper and lower arms to form an overall restraint. The high-pressure air also pushes the telescopic sleeve to extend. The dual fixation mechanism of the restraint airbag and the dynamic telescopic sleeve achieves multi-directional stable fixation of the patient's arm. The fixation head fits the angle of the arm, and the high-pressure air also restricts the swing, achieving multi-directional stable fixation of the patient's arm. 2. By designing the simple action of placing the arm as the trigger signal for the entire fixation process, and through a trigger mechanism consisting of a moving plate, a drive tube, and a guide spring, the connecting tube is only connected to the second chamber after the upper and lower arms are correctly placed, thereby automatically activating the subsequent restraint, locking, and dialysis tube fixation functions. 3. High-pressure air pushes the telescopic sleeve and moves the fixing head, further restricting arm movement from multiple angles to ensure the stability of the upper and lower arms during the examination. The ball end of the fixing head can swing to fit the curved surface of the upper and lower arms to avoid excessive local pressure. The high-pressure air also pushes the friction block to squeeze the fixing head, restricting the swing of the fixing head. It also works with the expanded restraint airbag to lock the position of the upper and lower arms, preventing the upper and lower arms from shaking or rotating internally between the upper and lower arms during dialysis, which would affect the dialysis results. Attached Figure Description
[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof.
[0013] Figure 1 This is a schematic diagram of the overall structure of an arm restraint device for hemodialysis in nephrology proposed in this invention; Figure 2 This is a schematic cross-sectional view of the overall structure of an arm restraint device for hemodialysis in nephrology proposed in this invention; Figure 3 This is a schematic cross-sectional view of the dynamic telescopic rod connection structure of an arm restraint device for hemodialysis in nephrology proposed in this invention; Figure 4 This is a schematic cross-sectional view of the placement box connection structure of the arm restraint device for nephrology hemodialysis proposed in this invention; Figure 5 This is a schematic cross-sectional view of the fixing box connection structure of an arm restraint device for hemodialysis in nephrology proposed in this invention.
[0014] In the attached diagram: 1. Placement box; 2. Dynamic telescopic rod; 3. Restraint strap; 4. Fixing box; 11. Connecting pipe; 12. Moving plate; 13. Guide spring; 14. First cavity; 15. Second cavity; 16. Placement groove; 21. Telescopic sleeve; 22. Fixing head; 23. Divider plate; 24. Hollow cavity; 25. Friction block; 26. First spring; 27. Second spring; 28. Driving pipe; 29. Connecting groove; 31. Restraint airbag; 41. Fixing groove; 42. Fixing airbag.
[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation
[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0017] Example 1, as Figures 1-5 As shown, this solution proposes an arm restraint device for hemodialysis in nephrology, including a placement box 1. The top wall of the placement box 1 is provided with a placement groove 16, which conforms to the shape of a human arm. The placement box 1 is hollow. A dynamic telescopic rod 2 is slidably connected in an arc-shaped array on the placement groove 16. The hollow part of the dynamic telescopic rod 2 is connected to the hollow part of the placement box 1. A restraint strap 3 is fixedly connected to one side wall of the placement box 1, and the other end of the restraint strap 3 is fitted to the other side wall of the placement box 1. A restraint airbag 31 is fixedly connected to the restraint strap 3. The restraint airbag 31 is connected to the hollow part of the placement box 1 through an air tube. A fixing box 4 is fixedly connected to both side walls of the placement box 1. The hollow part of the placement box 1 is connected to an external air source.
[0018] like Figures 1-4 As shown, a movable plate 12 is slidably connected to the inner wall of the placement box 1. The movable plate 12 divides the hollow part of the placement box 1 into a first cavity 14 and a second cavity 15. The second cavity 15 is connected to the hollow part of the dynamic telescopic rod 2. The restraint airbag 31 is connected to the hollow part of the second cavity 15.
[0019] like Figures 1-4As shown, a telescopic sleeve 21 is longitudinally slidably connected inside the dynamic telescopic rod 2. The hollow part of the telescopic sleeve 21 is connected to the second cavity 15. A first spring 26 is sleeved on the dynamic telescopic rod 2. The two ends of the first spring 26 are fixedly connected to the top end of the dynamic telescopic rod 2 and the placement groove 16, respectively. The first spring 26 is initially in an uncompressed state. The first spring 26 drives the bottom end of the dynamic telescopic rod 2 to contact the inner top wall of the placement box 1. A partition plate 23 is fixedly connected to the inner circumferential wall of the telescopic sleeve 21. A second spring 27 is provided inside the hollow part of the telescopic sleeve 21. The two ends of the spring 27 are fixedly connected to the bottom wall of the partition plate 23 and the bottom end of the dynamic telescopic rod 2, respectively. The initial state of the second spring 27 is uncompressed. The second spring 27 drives the bottom end of the telescopic sleeve 21 to contact the inner bottom end of the dynamic telescopic rod 2. The top end of the telescopic sleeve 21 is ball-jointed with a fixed head 22. One of the bottom ends of the dynamic telescopic rod 2 is coaxially fixedly connected to a drive tube 28. The bottom end of the drive tube 28 is in contact with the top wall of the moving plate 12. A connecting groove 29 passes through the drive tube 28. The hollow part of the dynamic telescopic rod 2 is connected to the second cavity 15 through the connecting groove 29.
[0020] like Figures 1-3 As shown, a hollow cavity 24 is provided between the top wall of the partition plate 23, the inner circumferential wall of the telescopic sleeve 21, and the ball end of the fixed head 22. A friction block 25 is provided inside the hollow cavity 24. The friction block 25 is longitudinally slidably connected to the inner circumferential wall of the telescopic sleeve 21. When no high-pressure air enters, the friction block 25 falls due to its own weight, and its bottom contacts the top of the partition plate 23. When high-pressure air enters the hollow part of the telescopic sleeve 21, the high-pressure air pushes the friction block 25 closer to the ball end of the fixed head 22. The top of the friction block 25 is arc-shaped. When the patient's arm contacts the fixed head 22, the pressure of the arm will force the entire dynamic telescopic rod to move. 2. Move downwards to compress the first spring 26. The dynamic telescopic rod 2 drives the telescopic sleeve 21 to move. When high-pressure air enters the second cavity 15, it pushes the friction block 25 close to the ball end of the fixed head 22, causing the telescopic sleeve 21 to extend out of the dynamic telescopic rod 2 and causing the fixed head 22 to contact the arm. The fixed head 22 fits against the arm. At the same time, the high-pressure air also causes the arc end of the friction block 25 to contact the ball end of the fixed head 22. The friction block 25 restricts the swing of the fixed head 22. The ball end of the fixed head 22 is provided with a connecting hole, and the external space is connected to the hollow cavity 24 through the connecting hole.
[0021] like Figures 1-4As shown, a connecting pipe 11 is fixedly connected to the side wall of the placement box 1. The connecting pipe 11 is connected to an external air source. A guide spring 13 is fixedly connected to the bottom wall of the moving plate 12 and the inner bottom wall of the placement box 1. The guide spring 13 is initially in an uncompressed state. The guide spring 13 drives the moving plate 12 to be above the connecting pipe 11. When the driving pipe 28 drives the moving plate 12 to move below the connecting pipe 11, the connecting pipe 11 is connected to the second cavity 15.
[0022] like Figures 1-2 and Figure 5 As shown, the fixed box 4 is provided with a fixed groove 41, and fixed airbags 42 are fixedly connected in a ring array on the circumferential wall of the fixed groove 41. The fixed airbags 42 are fixedly connected to the hollow of the fixed box 4.
[0023] Place the device in the examination position, untie the restraint strap 3, place the patient's upper arm and forearm in the placement slot 16, with the arm in contact with the fixing head 22, connect the restraint strap 3, connect the connecting tube 11 to the external air source, the arm drives the fixing head 22, the telescopic sleeve 21 and the dynamic telescopic rod 2 to move, compressing the first spring 26, one of the dynamic telescopic rods 2 pushes the driving tube 28 to move, the driving tube 28 drives the moving plate 12 to move, compressing the guide spring 13, the moving plate 12 moves to below the connecting tube 11, and insert the dialysis tube into the fixing slot 41 on the fixing box 4; When the moving plate 12 moves below the connecting pipe 11, the external air source inputs high-pressure air into the second cavity 15 in the placement box 1 through the connecting pipe 11. The high-pressure air is input into the restraint airbag 31 through the second cavity 15. The restraint airbag 31 expands and presses the patient's arm. At the same time, the high-pressure air enters the hollow part of the telescopic sleeve 21. The high-pressure air pushes the telescopic sleeve 21 to extend the dynamic telescopic rod 2, stretching the second spring 27. The telescopic sleeve 21 pushes the fixed head 22 to move. The fixed head 22 and the expanded restraint airbag 31 firmly restrain the patient's upper arm and forearm, preventing the patient's upper arm and forearm from bending and preventing the patient's arm from rotating inward during dialysis. When the fixing head 22 comes into contact with the patient's arm, the ball end of the fixing head 22 swings on one end of the telescopic sleeve 21, and the fixing head 22 fits the arm. At the same time, the high-pressure air also drives the friction block 25 to move in the hollow cavity 24. The arc-shaped end of the friction block 25 contacts the ball end of the fixing head 22, and the friction block 25 discharges the air in the hollow cavity 24 through the connecting hole. At this time, both ends of the fixing head 22 are squeezed by the arm and the friction block 25 respectively. The friction block 25 restricts the swing of the fixing head 22 and restricts the shaking of the patient's arm, fits the shape of the patient's arm in real time, and avoids excessive local pressure. High-pressure air enters the fixed chamber 4 through the second chamber 15, and then enters the fixed air bladder 42. The fixed air bladder 42 inflates and secures the dialysis tubing, preventing it from moving. After dialysis, the external air source stops supplying the placement box 1, the restraint strap 3 is released, and the high-pressure air in the restraint airbag 31, the second cavity 15 and the fixed airbag 42 is discharged. The high-pressure air stops driving the friction block 25 to contact the ball end of the fixed head 22, and the arm is removed. The second spring 27 returns to its original position, and the second spring 27 pushes the telescopic sleeve 21 to return to its original position. At the same time, the guide spring 13 returns to its original position, and the guide spring 13 drives the moving plate 12 to return to its original position. The first spring 26 returns to its original position, driving the dynamic telescopic rod 2 to return to its original position. One of the dynamic telescopic rods 2 pushes the drive tube 28 to move, and the dialysis tube is removed from the fixed slot 41.
[0024] 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 spirit of the invention, such designs should fall within the protection scope of the present invention.
Claims
1. A kind of renal department hemodialysis arm restraint device, including placement box (1), the top wall of the placement box (1) is equipped with placement groove (16), the placement box (1) is hollowly arranged, it is characterized by: The arc-shaped array sliding communication is arranged on the placing groove (16), and a dynamic telescopic rod (2) is arranged in the arc-shaped array sliding communication. The dynamic telescopic rod (2) is hollowly arranged. The hollow part of the dynamic telescopic rod (2) is in communication with the hollow part of the placing box (1). The side wall of the placing box (1) is fixedly connected with a restraint belt (3). The restraint belt (3) is fixedly connected with a restraint air bag (31). The restraint air bag (31) is in communication with the hollow part of the placing box (1) through an air pipe. The two side walls of the placing box (1) are fixedly connected with a fixed box (4). The hollow part of the placing box (1) is in communication with an external air source. The dynamic telescopic rod (2) is longitudinally and slidingly connected with a telescopic sleeve (21). The hollow part of the telescopic sleeve (21) is in communication with the second cavity (15). The inner circumferential wall of the telescopic sleeve (21) is fixedly connected with a partition plate (23). The telescopic sleeve (21) is ball-hinged with a fixed head (22) at the top end. The dynamic telescopic rod (2) is sleeved with a first spring (26). The two ends of the first spring (26) are fixedly connected with the top end of the dynamic telescopic rod (2) and the placing groove (16) respectively. The hollow part of the telescopic sleeve (21) is provided with a second spring (27). The two ends of the second spring (27) are fixedly connected with the bottom wall of the partition plate (23) and the bottom end of the dynamic telescopic rod (2) respectively.
2. The arm restraint device for hemodialysis according to claim 1, wherein: The inner wall of the placing box (1) is longitudinally and slidingly connected with a moving plate (12). The moving plate (12) separates the hollow part of the placing box (1) into a first cavity (14) and a second cavity (15). The second cavity (15) is in communication with the hollow part of the dynamic telescopic rod (2). The restraint air bag (31) is in communication with the hollow part of the second cavity (15).
3. The arm restraint device for hemodialysis according to claim 2, wherein: The bottom end of one of the dynamic telescopic rods (2) is coaxially and fixedly connected with a driving pipe (28). The bottom end of the driving pipe (28) is in contact with the top wall of the moving plate (12). The driving pipe (28) is penetrated with a communication groove (29). The hollow part of the dynamic telescopic rod (2) is in communication with the second cavity (15) through the communication groove (29).
4. The arm restraint device for hemodialysis according to claim 3, wherein: A hollow cavity (24) is arranged between the top wall of the partition plate (23), the inner circumferential wall of the telescopic sleeve (21) and the ball head end of the fixed head (22). A friction block (25) is arranged in the hollow cavity (24). The friction block (25) is longitudinally and slidingly connected with the inner circumferential wall of the telescopic sleeve (21). The top end of the friction block (25) is arranged in an arc shape. High-pressure air pushes the friction block (25) to lock the fixed head (22).
5. The arm restraint device for hemodialysis according to claim 4, wherein: A fixed groove (41) is arranged in the fixed box (4). A fixed air bag (42) is fixedly connected in an annular array on the circumferential wall of the fixed groove (41). The fixed air bag (42) is in fixed communication with the hollow part of the fixed box (4).