Internal fistula blood vessel self-expanding and rehabilitation exercise device

Abstract

This utility model belongs to the field of medical device technology and discloses an arteriovenous fistula (AVF) self-dilation and rehabilitation exercise device, including a first strip-shaped airbag and a fist-clenching assembly. The first strip-shaped airbag has a deflation valve fixedly mounted on it and is connected to an inflation pump. One end of the first strip-shaped airbag has a locking buckle, and the other end has a strip-shaped locking piece. The locking buckle includes a fixing seat and a positioning sub-component. The locking piece has a positioning mother-component fixed on it. The fixing seat has an inlet and an outlet communicating with the internal cavity. The strip-shaped locking piece passes through the inlet of the fixing seat into the internal cavity and exits through the outlet. The exiting strip-shaped locking piece is fixed to the positioning sub-component by the positioning mother-component. The fist-clenching assembly includes an arm fixing seat and a finger sleeve for attaching to the fingers. One side of the finger sleeve is connected to a reciprocating drive structure via a pull cord, and the other side is connected to the arm fixing seat via an elastic element. This utility model is easy to operate, allowing patients to operate independently, achieving preoperative vascular dilation and postoperative rehabilitation exercises, effectively reducing postoperative complications, and has low operating costs.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and relates to an arteriovenous fistula vasodilator and rehabilitation exercise device, specifically an arteriovenous fistula vasodilator for autonomous vasodilator and rehabilitation exercise device. Background Technology

[0002] Arteriovenous fistula (AVF) surgery typically involves making a small incision in the arm to connect a vein to an artery under the skin. This provides sufficient blood for hemodialysis, ensuring the quality of dialysis. Preoperatively, to guarantee blood flow, the patient's vein diameter must be greater than 0.6 cm. However, under normal circumstances, a person's vein diameter is usually less than 0.6 cm, necessitating vascular dilation. Postoperatively, complications such as stenosis or even occlusion of the fistula are highly likely, requiring further treatment. Currently, balloon angioplasty is a method to improve poor vascular conditions. The disadvantages of this method are that it requires surgery, is expensive, and the vein may narrow again after surgery. Postoperative complications can only be prevented with medication; there are no effective rehabilitation devices available. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention aims to provide an arteriovenous fistula auto-dilation and rehabilitation exercise device, enabling patients to perform preoperative vascular dilation training and postoperative rehabilitation training independently, thereby reducing the probability of complications.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An arteriovenous fistula self-dilation and rehabilitation exercise device includes a first strip-shaped air bladder for applying pressure when wrapped around the arm and a fist-clenching assembly for driving finger flexion and extension. The first strip-shaped air bladder is fixed with a deflation valve and is connected to an inflation pump via a hose. One end of the first strip-shaped airbag is fixedly provided with a buckle, and the other end is fixedly provided with a strip-shaped locking piece; the buckle includes a fixed seat with an inner cavity and a positioning sub-component fixed on the outer wall of the fixed seat, a positioning mother-component is fixedly provided on the locking piece, the fixed seat has an inlet and an outlet communicating with the inner cavity, the strip-shaped locking piece passes through the inlet of the fixed seat into the inner cavity and then passes through the outlet, and the exiting strip-shaped locking piece is fixed on the positioning sub-component by the positioning mother-component; The fist-clenching assembly includes an arm fixation base and a finger sleeve for fitting onto the fingers. A reciprocating drive structure is fixed on the arm fixation base. One side of the finger sleeve is fixedly connected to the reciprocating drive structure via a pull cord, and the other side is fixedly connected to the arm fixation base via an elastic element.

[0005] As a limitation of this utility model, a positioning rod is threadedly connected to the fixed base, and a positioning piece is fixedly mounted on the positioning rod. The positioning piece is located in the inner cavity of the fixed base, and the positioning piece abuts against the inner wall of the strip-shaped locking piece that passes through the fixed base.

[0006] As another limitation of this utility model, it also includes a second strip-shaped airbag arranged in parallel with the first strip-shaped airbag. The second strip-shaped airbag is fixedly provided with a deflation valve. The second strip-shaped airbag is connected to an inflation pump through a hose. An inflation switch is fixedly provided on both hoses. The two ends of the second strip-shaped airbag are fixedly connected to a fixing base and a strip-shaped locking piece, respectively. The first strip-shaped airbag and the second strip-shaped airbag are connected through a first one-way valve and a second one-way valve. The passage directions of the first one-way valve and the second one-way valve are opposite.

[0007] As a limitation of this utility model, the arm fixing seat includes a seat body for fixing the arm and a fixing plate for fixing the palm. The seat body is provided with a groove for placing the arm, and the fixing plate is fixed with a fixing strap for making the palm fit tightly against the fixing plate. Suction cups are fixed on both the seat body and the fixing plate.

[0008] As a further limitation of this utility model, the reciprocating drive structure is a cylinder, and the telescopic rod of the cylinder is fixedly connected to the pull rope.

[0009] As a third limitation of this utility model, the elastic element is a spring.

[0010] As a limitation of this utility model, the positioning sub-component is a hook and loop fastener, and the positioning female component is a hook and loop fastener.

[0011] As a further limitation of this utility model, a plurality of strip-shaped protrusions are fixed on the side of the strip-shaped locking piece that contacts the snap-fit ​​piece.

[0012] As a further limitation of this utility model, the fixing base, positioning rod, and positioning piece are all made of plastic.

[0013] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows: (1) Patients can operate this utility model independently, and can achieve preoperative vasodilation and postoperative rehabilitation exercises. When performing vasodilation, the first strip-shaped airbag can be tightly wrapped around the arm by pulling the strip-shaped locking plate with one hand. The airbag is inflated by the air pump to prevent the flow of blood in the arm and increase the blood volume of the blood vessels. Repeated operation can dilate the blood vessels. No surgery is required and patients can use it independently. At the same time, the fist-clenching component is used to drive the fingers to repeatedly and passively clench the fist through the reciprocating drive structure, avoiding the disadvantage of being lazy or forgetting to cooperate with the fist-clenching action due to poor memory in the elderly. The operation is simple and the cost is low. At the same time, after surgery, repeated exercise can also prevent complications and reduce the probability of narrowing of blood vessels. It is highly practical. (2) By rotating the positioning rod, the positioning piece presses the strip-shaped locking piece against the inner wall of the fixing seat, which further plays a role in fastening and improves the tightness of the first strip-shaped airbag wrapped around the arm. It can effectively prevent loosening and can be operated with one hand, thus improving the convenience of use. (3) The present invention is provided with a second strip-shaped airbag, which is arranged in parallel with the first strip-shaped airbag. Both are wrapped around the arm and inflated alternately, which can reduce the discomfort of local pressure on the patient's arm and improve the comfort of use. (4) The groove on the seat of this utility model can limit the arm and improve the stability of the fist. The fixing strap can prevent the palm from lifting when making a fist and improve the standard of the fist. (5) The structure of the hook and loop fastener of this utility model makes it more convenient for patients to operate independently with one hand, and it can fix the first strip airbag and the second strip airbag more quickly and without loosening. (6) The strip-shaped protrusion of this utility model can increase the friction of the positioning piece and improve the firmness of the winding.

[0014] In summary, this invention is easy to operate, allowing patients to perform it independently, enabling preoperative vasodilation and postoperative rehabilitation exercises, effectively reducing postoperative complications, and has low operating costs. It is suitable for preoperative and postoperative vasodilation of arteriovenous fistulas. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a partial cross-sectional top view of the unfolded structure of this utility model; Figure 2 This is a partial cross-sectional front view of the structure in use according to an embodiment of the present invention; Figure 3 This is a side view of the fixed base in an embodiment of the present invention; Figure 4 This is a top view of the fist-clenching component according to an embodiment of the present invention; Figure 5 This is a side view of the fist-clenching assembly according to an embodiment of the present invention.

[0017] In the diagram: 1. First strip-shaped airbag; 2. Second strip-shaped airbag; 3. Inflation pump; 4. Hose; 5. Inflation switch; 6. First one-way valve; 7. Second one-way valve; 8. Deflator; 9. Fixing seat; 10. Inner cavity; 11. Outlet; 12. Inlet; 13. Positioning rod; 14. Positioning plate; 15. Strip-shaped locking plate; 16. Strip-shaped protrusion; 17. Seat body; 18. Fixing plate; 19. Finger sleeve; 20. Cylinder; 21. Pull rope; 22. Fixing strap; 23. Spring. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0019] Example 1: An arteriovenous fistula self-dilation and rehabilitation exercise device like Figure 1 , Figure 2 As shown, this embodiment includes a first strip-shaped airbag 1 and a second strip-shaped airbag 2 for applying pressure to the arm, and also includes a fist-clenching assembly for driving finger flexion and extension. The first strip-shaped airbag 1 and the second strip-shaped airbag 2 cause blood vessels to dilate by applying pressure to the arm. At the same time, the patient passively clenches his fist through the fist-clenching assembly, further preventing arteriovenous fistula occlusion.

[0020] The first strip-shaped airbag 1 and the second strip-shaped airbag 2 are arranged side by side for wrapping around the arm. The first strip-shaped airbag 1 and the second strip-shaped airbag 2 are respectively provided with a fixing seat 9 and a strip-shaped locking plate 15 at both ends. One end of the first strip-shaped airbag 1 and the second strip-shaped airbag 2 are fixedly connected to the fixing seat 9, and the other end is fixedly connected to the strip-shaped locking plate 15. The strip-shaped locking plate 15 is passed through the fixing seat 9 to fix the first strip-shaped airbag 1 and the second strip-shaped airbag 2 on the arm. The first strip-shaped airbag 1 and the second strip-shaped airbag 2 are alternately inflated by the air pump 3. After inflation, the blood flow in the arm is blocked, and the blood continuously gathers, causing the blood vessels to dilate, so as to achieve the effect of vasodilation without surgery. It is suitable for preoperative preparation and postoperative rehabilitation.

[0021] The first strip airbag 1 and the second strip airbag 2 are connected by a hose 4 and an inflation pump 3 is provided. An inflation switch 5 is fixed on each of the two hoses 4, so that the inflation pump 3 can inflate the first strip airbag 1 or the second strip airbag 2 separately.

[0022] The first strip-shaped airbag 1 and the second strip-shaped airbag 2 are arranged side by side along the length of the arm, with a gap between them. The first strip-shaped airbag 1 and the second strip-shaped airbag 2 are connected by a first one-way valve 6 and a second one-way valve 7, allowing their inflation to be independent and unaffected. Both the first one-way valve 6 and the second one-way valve 7 are located in the gap between the first strip-shaped airbag 1 and the second strip-shaped airbag 2. The flow directions of the first one-way valve 6 and the second one-way valve 7 are opposite. Opening the first one-way valve 6 allows gas from the first strip-shaped airbag 1 to flow to the second strip-shaped airbag 2, and opening the second one-way valve 7 allows gas from the second strip-shaped airbag 2 to flow to the first strip-shaped airbag 1. When discomfort is felt when the first strip-shaped airbag 1 is wrapped around the arm, opening the first one-way valve 6 and closing the second one-way valve 7 allows gas from the first strip-shaped airbag 1 to flow to the second strip-shaped airbag 2, while simultaneously using the inflation pump 3 to inflate the second strip-shaped airbag 2, accelerating its inflation speed. Both the first strip-shaped airbag 1 and the second strip-shaped airbag 2 are equipped with a deflation valve 8. When not in use, the gas in the first strip-shaped airbag 1 and the second strip-shaped airbag 2 is released for easy storage.

[0023] One end of the first strip airbag 1 and the second strip airbag 2 are fixedly connected to the buckle, and the other end is fixedly connected to the strip locking piece 15. The strip locking piece 15 is inserted into the buckle and fixed, so that the first strip airbag 1 and the second strip airbag 2 are wrapped around the arm and tightly wrapped around the arm.

[0024] The latch includes a fixed base 9 and a positioning component. The fixed base 9 is a long strip made of plastic and has an inner cavity 10. A positioning rod 13 is threadedly connected to the fixed base 9. The positioning rod 13 is arranged along the length of the fixed base 9 and is a bolt structure made of plastic. Its head is located outside the fixed base 9, and the rod part passes through the inner cavity 10 of the fixed base 9 and is threadedly connected to the fixed base 9. A plastic positioning piece 14 is fixed on the positioning rod 13. The positioning piece 14 is located in the inner cavity 10 of the fixed base 9. Rotating the positioning rod 13 can cause the positioning piece 14 to abut against the inner wall of the strip-shaped locking piece 15 inserted into the fixed base 9, thereby fixing the strip-shaped locking piece 15 to the fixed base 9. Figure 3 As shown, the fixed base 9 has an inlet 12 and an outlet 11 that communicate with the inner cavity 10. The strip-shaped locking piece 15 passes through the inlet 12 of the fixed base 9 into the inner cavity 10 and then exits through the outlet 11. The positioning piece is fixed to the left side of the outer wall of the fixed base 9. Figure 1 As shown on the left side (the positioning sub-component is not shown in the figure), a positioning female component (also not shown in the figure) is fixed on the locking piece, and the protruding strip-shaped locking piece 15 is fixed to the positioning sub-component by the positioning female component. In this embodiment, the positioning sub-component is a hook-and-loop fastener, and the positioning female component is a hook-and-loop fastener.

[0025] A plurality of strip-shaped protrusions 16 are fixed on the side of the strip-shaped locking piece 15 that contacts the positioning piece 14. The strip-shaped protrusions 16 are located on the lower surface of the strip-shaped locking piece 15. Figure 1 (As shown on the lower surface), each strip protrusion 16 is evenly spaced along the width direction of the strip locking piece 15 to increase the friction between the positioning piece 14 and the strip locking piece 15.

[0026] In this embodiment, the initial state of the first strip airbag 1 and the second strip airbag 2 structure is as follows: the strip locking piece 15 is inserted into the inner cavity 10 of the fixing seat 9 through the inlet 12 and exits through the outlet 11, so that the ring formed by the first strip airbag 1 and the second strip airbag 2 is large enough to accommodate arms of different thicknesses.

[0027] like Figure 4 , Figure 5 As shown, the fist-clenching assembly includes an arm support and finger sleeves 19 for attaching to the fingers. A reciprocating drive structure is fixed on the arm support. One side of the finger sleeve 19 is fixedly connected to the reciprocating drive structure via a pull cord 21, and the other side is fixedly connected to the arm support via an elastic element. The finger sleeves 19 are used to attach to the fingers, and the purpose of clenching a fist is achieved by flexing and extending the fingers.

[0028] The arm support includes a base 17 and a mounting plate 18. The base 17 has a groove running its length through its center for holding the arm. The base 17 has box-like structures on both sides, each with a reciprocating drive mechanism consisting of a cylinder 20, which is fixed within the box structure on each side of the base 17. The mounting plate 18 is fixed to one end of the base 17. The mounting plate 18 is a sheet-like structure with a fixing strap 22. One end of the strap 22 is fixed to the mounting plate 18, and the other end is attached to the mounting plate 18 via a hook and loop fastener, allowing the hand to rest firmly against the mounting plate 18. Suction cups are fixed to both the base 17 and the mounting plate 18 for easy mounting on a table.

[0029] The finger sleeve 19 is made of elastic fabric and can adapt to different hand sizes. Two pull cords 21 are fixed on one side of the finger sleeve 19. The two pull cords 21 are fixedly connected to the telescopic rods of the two cylinders 20 respectively. Two elastic elements are fixed on the other side of the finger sleeve 19. The elastic elements are springs 23. The other end of the springs 23 is fixed on the fixed plate 18. When the finger is inserted into the finger sleeve 19, the finger clenches into a fist by retracting the telescopic rod of the cylinder 20. After the telescopic rod of the cylinder 20 extends, the finger is opened and reset by the elastic force of the spring 23.

[0030] When using this embodiment, the method of using this structure for vasodilation before and after the operation is the same. The patient puts the ring formed by the first strip-shaped airbag 1 and the second strip-shaped airbag 2 on the front or back of the arm where vasodilation is needed. With the other hand, the patient pulls the strip-shaped locking piece 15 so that the first strip-shaped airbag 1 and the second strip-shaped airbag 2 tightly wrap around the arm. Then, the positioning mother piece on the strip-shaped locking piece 15 is attached to the positioning daughter piece of the fixing seat 9. In order to prevent the strip-shaped locking piece 15 from loosening, after fixing, the positioning rod 13 is rotated so that the positioning piece 14 abuts against the inner wall of the inner cavity 10 of the fixing seat 9. At this time, the positioning piece 14 presses the strip-shaped locking piece 15 tightly against the inner wall of the inner cavity 10 of the fixing seat 9, further improving the tightness of the wrapping. After donning the device, open the inflation switch 5 on the hose 4 connected to the first airbag 1 to inflate it. After inflation, the blood vessels in the arm dilate due to poor blood flow. After 5 minutes, open the deflation valve 8 on the first airbag 1 to release some air and relieve discomfort. Then, inflate the first airbag 1 again using the inflation pump 3 to further dilate the blood vessels. After repeating this process for a period of time, the area on the arm where the first airbag 1 is located will become red from pressure. At this point, open the first one-way valve 6 to allow the air in the first airbag 1 to flow into the second airbag 2. Repeat this process to repeatedly inflate the second airbag 2 to dilate the blood vessels. This alternating inflation cycle changes the pressure point on the arm, dilating the blood vessels while avoiding prolonged pressure on the same area, which can cause discomfort. The device can be used in conjunction with the fist-clenching component while applying pressure to the arm. Activating the cylinder 20 causes the fingers to passively clench into a fist. The two components operate independently, but using them simultaneously enhances the effect.

[0031] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for autonomous dilation and rehabilitation of arteriovenous fistula vessels, characterized in that: It includes a first strip-shaped airbag for applying pressure when wrapped around the arm and a fist-clenching assembly for driving finger flexion and extension. The first strip-shaped airbag is equipped with a deflation valve and is connected to an inflation pump via a hose. One end of the first strip-shaped airbag is fixedly provided with a buckle, and the other end is fixedly provided with a strip-shaped locking piece; the buckle includes a fixed seat with an inner cavity and a positioning sub-component fixed on the outer wall of the fixed seat, a positioning mother-component is fixedly provided on the locking piece, the fixed seat has an inlet and an outlet communicating with the inner cavity, the strip-shaped locking piece passes through the inlet of the fixed seat into the inner cavity and then passes through the outlet, and the exiting strip-shaped locking piece is fixed on the positioning sub-component by the positioning mother-component; The fist-clenching assembly includes an arm fixation base and a finger sleeve for fitting onto the fingers. A reciprocating drive structure is fixed on the arm fixation base. One side of the finger sleeve is fixedly connected to the reciprocating drive structure via a pull cord, and the other side is fixedly connected to the arm fixation base via an elastic element.

2. The arteriovenous fistula self-dilation and rehabilitation exercise device according to claim 1, characterized in that: A positioning rod is threaded onto the fixed base, and a positioning piece is fixed on the positioning rod. The positioning piece is located in the inner cavity of the fixed base, and the positioning piece abuts against the inner wall of the strip-shaped locking piece that passes through the fixed base.

3. The arteriovenous fistula self-dilation and rehabilitation exercise device according to claim 1 or 2, characterized in that: It also includes a second strip airbag arranged in parallel with the first strip airbag. The second strip airbag is equipped with a deflation valve. The second strip airbag is connected to an inflation pump through a hose. Both hoses are equipped with inflation switches. The two ends of the second strip airbag are fixedly connected to a fixing base and a strip locking piece, respectively. The first strip airbag and the second strip airbag are connected through a first one-way valve and a second one-way valve. The passage directions of the first one-way valve and the second one-way valve are opposite.

4. The arteriovenous fistula self-dilation and rehabilitation exercise device according to claim 3, characterized in that: The arm fixation seat includes a base for fixing the arm and a fixing plate for fixing the palm. The base has a groove for placing the arm, and the fixing plate has a fixing strap for making the palm fit tightly against the fixing plate. Suction cups are fixed on both the base and the fixing plate.

5. The arteriovenous fistula self-dilation and rehabilitation exercise device according to claim 4, characterized in that: The reciprocating drive structure is a cylinder, and the cylinder's telescopic rod is fixedly connected to the pull rope.

6. A device for spontaneous dilation and rehabilitation of arteriovenous fistulas according to any one of claims 1, 2, 4 or 5, characterized in that: The elastic element is a spring.

7. The arteriovenous fistula self-dilation and rehabilitation exercise device according to claim 6, characterized in that: The positioning sub-component is a hook and loop fastener, and the positioning female component is a hook and loop fastener.

8. The arteriovenous fistula self-dilation and rehabilitation exercise device according to claim 7, characterized in that: The side of the strip-shaped locking piece that contacts the snap-fit ​​piece is provided with multiple strip-shaped protrusions.

9. A device for spontaneous dilation and rehabilitation of arteriovenous fistulas according to any one of claims 2, 4, 5, 7 or 8, characterized in that: The fixing base, positioning rod, and positioning plate are all made of plastic.

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