Skin tauter for hemodialysis puncture

Abstract

The utility model relates to a hemodialysis auxiliary device, provide a skin firming device for hemodialysis puncture, the longitudinal of firming device body is equipped with firming device recess, and the both ends of firming device recess are equipped with pad respectively, be equipped with clamping device in firming device recess, still be equipped with controller on firming device body, and controller is electrically connected with clamping device. The utility model uses when puncturing in dialysis internal fistula, and clamping device replaces medical staff to the skin of patient arm part and pulls down, guarantees the skin firmness of puncture part, and then the medical staff who carries out puncture operation punctures, reduces the work burden of medical staff, improves the puncture success rate, reduces the patient's pain simultaneously. The utility model can also replace the use of pulse pillow, and can prevent arm bending. Meanwhile can fix dialysis pipeline, and can move with patient.

Description

Technical Field

[0001] This utility model relates to hemodialysis auxiliary devices, and in particular to a skin tightening device for hemodialysis puncture. Background Technology

[0002] Hemodialysis (HD) is an alternative treatment for patients with acute and chronic renal failure to maintain their lives. It involves drawing blood from the arteries outside the body, passing it through a dialyzer to remove toxins and excess water, and then returning the purified blood to the body through a vein. Regular dialysis sessions last 4 hours each time, 3 times a week.

[0003] Currently, hemodialysis centers typically use tourniquets to promote vascular filling before puncture. However, due to advancements in dialysis technology, the duration of dialysis patients' lives, and the increasing aging of the patient population, many elderly dialysis patients experience excessive skin laxity in their arms due to factors such as toxin erosion, poor nutrition, and advanced age. Even with tourniquets, while increasing vascular filling, the vessels are prone to slippage, displacement, and uncontrollability, leading to difficulty in locating the vessel during puncture, and even puncturing the vessel wall. This reduces the success rate of puncture, increases the difficulty of the procedure, and causes more pain for the patient. Blood vessels are a non-renewable resource; excessive damage can reduce the puncture area and affect the lifespan of the arteriovenous fistula (AVF). Therefore, currently, when performing AVF punctures on patients with loose skin, other medical staff need to pull the skin downwards on the patient's arm to ensure the skin at the puncture site is firm before the puncture is performed. This adds to the workload of medical staff already facing staff shortages in hemodialysis centers. To improve the success rate of puncture, reduce the workload of medical staff, alleviate patient pain, and prolong the lifespan of arteriovenous fistulas, a skin tightening device is urgently needed.

[0004] In addition, most dialysis units currently adjust the position of the patient's limb on the puncture side by placing a pulse pillow under the arm. However, cleaning and disassembling this method is troublesome, and the position is easily moved and not easy to fix. Moreover, patients often move around during dialysis, which is inconvenient. Patients may also bend their arms during long dialysis sessions, which may cause the puncture needle to puncture the skin, resulting in skin hematoma and bruising, damaging blood vessels, blood extravasation, and affecting blood flow and dialysis effectiveness.

[0005] Furthermore, most hemodialysis centers currently use hemostatic forceps or adhesive tape to secure dialysis tubing. However, infection control guidelines discourage the use of hemostatic forceps because they cannot be used by one person per use and sterilized, and post-use disposal is often an easily overlooked issue. Adhesive tape is also not secure, as the dialysis tubing can easily slip off, leading to needle dislodgement and bleeding. The adhesive residue from the tape can easily adhere to sheets, bed rails, or other attached surfaces and is difficult to remove. While some specialized tubing clamps are available on the market, they also have many drawbacks, such as clamps that do not hold tightly and are prone to falling off. The tubing clamps are often made of hard material and are too small, making them difficult to insert properly, affecting blood flow, causing machine alarms, and disrupting dialysis. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a skin tightening device for hemodialysis puncture, including a tightening device body, which is elongated and has a tightening device groove along its longitudinal direction. Pads are respectively provided at both ends of the tightening device groove. A clamping device is provided inside the tightening device groove, which includes a first telescopic part and a second telescopic part. The first telescopic part and the second telescopic part are respectively located on both sides inside the tightening device groove, enabling opposite movements from both sides towards the center and opposite movements from the center towards both sides. A controller is also provided on the tightening device body, which is electrically connected to the clamping device to control the clamping device.

[0007] Furthermore, the pad at one end of the clamping groove is higher than the pad at the other end. The proximal end is lower, and the distal end is higher.

[0008] As a preferred embodiment, the first telescopic part and the second telescopic part are strip-shaped air bladders. The strip-shaped air bladders of the first telescopic part and the second telescopic part are arranged opposite each other along the longitudinal direction of the tightener body. An air pump is also provided in the tightener body. The air pump is connected to the strip-shaped air bladders of the first telescopic part and the second telescopic part through air pipes respectively. The air pump is also electrically connected to a controller, which controls the air pump to turn on or off.

[0009] Furthermore, the upper and lower sidewalls or left and right sidewalls of the strip-shaped airbag are provided with elastic bodies, and the elastic bodies are normally in a contracted state; when the strip-shaped airbag is not inflated, the elastic bodies cause the strip-shaped airbag to retract towards the groove wall of the tightener; when the strip-shaped airbag is inflated, the strip-shaped airbag overcomes the contraction force of the elastic bodies and extends towards the center of the groove of the tightener.

[0010] Furthermore, an electrically controlled valve is provided on the inflation tube between the air pump and the strip-shaped inflation bladder of the first and second telescopic parts. The electrically controlled valve is electrically connected to the controller, and the controller controls the opening or closing of the electrically controlled valve, thereby controlling the on / off state of the inflation tube.

[0011] As another preferred embodiment, the first telescopic part and the second telescopic part respectively include an electric push rod and a clamping bar. One end of the electric push rod is fixed to the inner side wall of the clamping groove, and the other end is connected to the clamping bar. The electric push rod and clamping bar of the first telescopic part are arranged opposite to the electric push rod and clamping bar of the second telescopic part. The electric push rod is electrically connected to the controller, and the controller controls the extension and retraction of the electric push rod.

[0012] Preferably, the first telescopic part and the second telescopic part are respectively inclined downward from the outside to the inside; specifically: the strip-shaped air bladder of the first telescopic part and the second telescopic part are inclined downward, and when inflated, the strip-shaped air bladder extends obliquely downward; or the electric push rod of the first telescopic part and the second telescopic part are inclined downward, and when the electric push rod is started, it pushes the clamping strip to extend obliquely downward.

[0013] The tightening device described in this utility model has a battery inside, which is electrically connected to each electrical component inside the tightening device; or the tightening device body has a power interface, which is connected to an external power source through a wire, so that the power source is electrically connected to each electrical component inside the tightening device to supply power to each electrical component.

[0014] Furthermore, the upper part of the tightening device body is provided with several straps, which cross the upper opening of the tightening device groove. One end of the strap is fixedly connected to one side of the outer wall of the tightening device body, and the other end is connected to the other side of the outer wall of the tightening device body by hook and loop fastener or Velcro.

[0015] Furthermore, the outer wall of the tightening device body is provided with a pipe fixing groove, which is arranged longitudinally along the tightening device body; the opening of the pipe fixing groove is provided with an outwardly opening inclined piece.

[0016] Preferably, the cross-section of the pipe fixing groove is an open ring, the opening width is smaller than the diameter of the ring, and the diameter of the ring is the same as or slightly smaller than the diameter of the dialysis tubing.

[0017] Furthermore, the tightening device body is designed as a split body, including an upper body and a lower body. The upper body is located above the lower body, and the upper body and the lower body can be connected or separated. The clamping device and controller are located in the lower body, and the straps are located in the upper body.

[0018] As a preferred embodiment, at least one set of opposite sides of the lower part of the main body is provided with a push-button buckle, and a spring is provided inside the push-button buckle. A corresponding slot is provided on the upper part of the main body. When the upper part of the main body is connected to the lower part of the main body, the protrusion at the top of the push-button buckle engages with the slot on the upper part of the main body, thereby fixing the upper part of the main body to the lower part of the main body.

[0019] As another preferred embodiment, at least one set of opposing edges between the upper and lower parts of the body are provided with spring latches, and the upper and lower parts of the body are connected by spring latches.

[0020] The working principle of this utility model:

[0021] This utility model provides a skin tightening device for hemodialysis puncture, used during dialysis fistula puncture. The tightening device body is designed as a long strip shape to fit the human arm.

[0022] When in use, the device is powered on, and the dialysis patient's arm is placed in the clamping device groove, with the elbow positioned within the groove. The wrist rests on the pad at the front end, and the upper arm rests on the pad at the rear end. The pads support the arm and provide installation space for the clamping device. The lower part of the arm rests on the first and second telescopic parts of the clamping device. The first and second telescopic parts extend and retract under the control of the controller. When the first and second telescopic parts move towards each other from both sides, they push the loose skin of the patient's lower arm towards the center, thereby tightening the skin of the upper arm and facilitating the exposure of blood vessels for puncture. After the puncture is completed, when the first and second telescopic parts move in opposite directions from the center to both sides, they release the pushed skin.

[0023] The pad near the hand of the tightener groove is higher than the pad near the shoulder, so that the hand is higher than the elbow, promoting blood flow.

[0024] One preferred embodiment is that the first and second telescopic parts are strip-shaped air bladders, and an air pump inflates these air bladders through an inflation tube; the inflated air bladders on both sides push the skin of the arm towards the center. To prevent slippage, anti-slip strips or anti-slip protrusions can be provided on the air bladders at the points of contact with the skin to increase friction with the skin.

[0025] The elastic body provided on the upper and lower side walls or left and right side walls of the strip-shaped airbag causes the strip-shaped airbag to retract towards the groove wall of the tightener when it is not inflated; when inflated, the strip-shaped airbag overcomes the contraction force of the elastic body and extends towards the center of the groove of the tightener, ensuring the lateral expansion and contraction movement of the strip-shaped airbag and realizing the pushing of the skin.

[0026] The electrically controlled valve on the inflation tube controls the opening and closing of the inflation tube. When the inflation pump fills the strip-shaped airbag with air, the electrically controlled valve closes, the inflation pump can stop inflating, and the strip-shaped airbag will not leak air. After puncture, the electrically controlled valve opens, and the strip-shaped airbag deflates and contracts.

[0027] In another preferred embodiment: the electric push rods of the first and second telescopic parts, under the control of the controller, push the clamping strip connected to them to extend and retract. One end of the electric push rod is fixed to the inner wall of the clamping device groove, and the other end is connected to the clamping strip. When the electric push rod pushes the clamping strip to move in opposite directions, the clamping strip pushes against the skin. After puncture, the electric push rod pulls the clamping strip to move in the opposite direction, releasing the skin. To prevent slippage, anti-slip strips or anti-slip protrusions can be provided on the clamping strip at the position in contact with the skin to increase the friction with the skin.

[0028] To better facilitate the pushing and squeezing of loose skin on the lower side of the arm, the first and second telescopic parts can be designed to be inclined downwards from the outside in, following the tangent of the arm.

[0029] Several straps on the tightening device are used to fix the arm to the tightening device to prevent the arm from moving during the puncture and affecting the puncture effect.

[0030] After the puncture is completed, the arteriovenous dialysis tubing can be fixed in the tubing fixing groove on the outer wall of the tightening device. There can be two tubing fixing grooves, which are distinguished by red and blue colors. The opening of the tubing fixing groove is provided with an outward-opening inclined plate to facilitate the insertion of the dialysis tubing.

[0031] The tightening device features a split design, with the upper part fixed to the patient's arm and able to move with the arm. After puncture, the patient can take the upper part with them to the toilet during dialysis. The lower part remains on the bed, reducing the burden on the arm.

[0032] The beneficial effects of this utility model are:

[0033] This invention provides a skin tightening device for hemodialysis puncture, used during dialysis fistula puncture. The clamping device replaces the need for medical staff to pull the skin downwards on the patient's arm, ensuring the skin at the puncture site is tight before the medical staff performs the puncture. This reduces the workload of medical staff, improves the success rate of puncture, and reduces patient discomfort. This invention can also replace a pulse pillow and prevent arm bending. It also secures the dialysis tubing and allows it to move with the patient. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0035] Figure 2 This is a top view of the structure of Embodiment 1 of this utility model;

[0036] Figure 3 This is a partial structural diagram of Embodiment 1 of the present utility model;

[0037] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0039] Figure 6 This is a schematic diagram of the structure of Embodiment 4 of this utility model;

[0040] Figure 7 This is a schematic diagram of the internal air pump structure in Embodiment 4 of this utility model;

[0041] Figure 8 This is a schematic diagram of the structure of Embodiment 5 of this utility model;

[0042] Figure 9 This is a schematic diagram of the skin pushing process in Embodiment 5 of this utility model;

[0043] Figure 10 This is a schematic diagram of the structure of Embodiment 7 of the present invention;

[0044] Figure 11 This is a side view of embodiment 7 of the present invention.

[0045] Figure 12 This is a schematic diagram of the structure of Embodiment 7 of the present invention;

[0046] Figure 13 This is a schematic diagram of the structure of embodiment 8 of the present utility model;

[0047] Figure 14 This is a schematic diagram of the pipe fixing groove structure of this utility model;

[0048] Figure 15 This is a schematic diagram of the usage state of Embodiment 8 of this utility model;

[0049] Figure 16 This is a schematic diagram of the structure of embodiment 9 of this utility model;

[0050] Figure 17 This is a schematic diagram of the split structure of Embodiment 9 of this utility model;

[0051] Figure 18 This is a schematic diagram of the push-button latch in Embodiment 9 of this utility model;

[0052] Figure 19 This is a cross-sectional view of the push-button buckle in Embodiment 9 of this utility model.

[0053] 1. Tightener body; 2. Tightener groove; 3. Pad; 4. Clamping device; 5. First telescopic part; 6. Second telescopic part; 7. Controller; 8. Anti-slip strip; 9. Electric push rod; 10. Clamping strip; 11. Tube fixing groove; 12. Strap; 13. Dialysis tubing; 14. Elastomer; 15. Inclined plate; 16. Press buckle; 17. Spring; 18. Air pump; 19. Air inflator tube; 101. Upper part of body; 102. Lower part of body. Detailed Implementation

[0054] Example 1

[0055] like Figure 1-3 As shown in the figure, this embodiment provides a skin tightening device for hemodialysis puncture, including a tightening device body 1. The tightening device body 1 is elongated and has a tightening device groove 2 along its longitudinal direction. Pads 3 are provided at both ends of the tightening device groove 2. The pads 3 have an arc-shaped chamfered design and a skin-friendly and soft surface material. A clamping device 4 is provided inside the tightening device groove 2. The clamping device 4 includes a first telescopic part 5 and a second telescopic part 6. The first telescopic part 5 and the second telescopic part 6 are respectively located on both sides inside the tightening device groove 2, enabling opposite movements from both sides towards the center and opposite movements from the center towards both sides. A controller 7 is also provided on the tightening device body 1. The controller 7 includes a processor and an input button or touch screen. The input button or touch screen is connected to the processor. The controller 7 is electrically connected to the clamping device 4 to control the clamping device 4.

[0056] Preferably, the parts of the first telescopic part 5 and the second telescopic part 6 that come into contact with the skin are aligned with or slightly higher than the lowest point of the pad 3, so that when the arm rests on the pad 3, the first telescopic part 5 and the second telescopic part 6 can come into contact with the skin.

[0057] The working principle of this utility model:

[0058] This utility model provides a skin tightening device for hemodialysis puncture, which is used during dialysis fistula puncture. The tightening device body 1 is designed as a long strip shape to fit the human arm.

[0059] When in use, the device is powered on, and the dialysis patient's arm is placed in the clamping device groove 2, with the elbow positioned in the clamping device groove 2; the wrist rests on the first end pad 3, and the upper arm rests on the last end pad 3. The pad 3 supports the arm and provides installation space for the clamping device 4; the lower part of the arm contacts the telescopic ends of the first telescopic part 5 and the second telescopic part 6 of the clamping device 4. The first telescopic part 5 and the second telescopic part 6 move telescopically under the control of the controller 7. When the first telescopic part 5 and the second telescopic part 6 move towards each other from both sides to the middle, they push the loose skin of the patient's lower arm towards the middle, thereby tightening the skin of the upper arm and facilitating the exposure of blood vessels for puncture; after the puncture is completed, when the first telescopic part 5 and the second telescopic part 6 move in opposite directions from the middle to both sides, they release the pushed skin.

[0060] Example 2

[0061] like Figure 1-4 As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on Embodiment 1, the pad 3 at one end of the tightening device groove 2 is higher than the pad 3 at the other end. Specifically, the pad 3 at the end of the tightening device groove 2 near the hand is higher than the pad 3 at the end near the shoulder, with the proximal end lower and the distal end higher, so that the hand position is higher than the elbow position, promoting blood return.

[0062] Example 3

[0063] like Figure 5 As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiment 1 or 2, the upper part of the tightening device body 1 is provided with 3 straps 12. The straps 12 cross the upper opening of the tightening device groove 2. One end of the strap 12 is fixedly connected to one side of the outer wall of the tightening device body 1, and the other end is connected to the other side of the outer wall of the tightening device body 1 by hook and loop fastener or Velcro.

[0064] Two straps 12 are fixed to the forearm, and another strap 12 is fixed to the upper arm to fix the arm to the clamp and prevent the arm from moving during the puncture process and affecting the puncture effect.

[0065] Example 4

[0066] like Figure 1-7As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiment 1, 2, or 3, the first telescopic part 5 and the second telescopic part 6 are strip-shaped air bladders. The surface layer of the strip-shaped air bladders is preferably made of a skin-friendly and non-slip material. The strip-shaped air bladders of the first telescopic part 5 and the second telescopic part 6 are arranged opposite each other longitudinally along the tightening device body 1. The tightening device body 1 is also provided with an air pump 18, which is a commercially available miniature air pump. The air pump 18 is connected to the strip-shaped air bladders of the first telescopic part 5 and the second telescopic part 6 through an air tube 19. The air pump 18 is also electrically connected to a controller 7, which controls the air pump 18 to turn on or off.

[0067] The air pump 18 inflates the strip-shaped air bladders of the first telescopic part 5 and the second telescopic part 6 through the air tube 19; the inflated strip-shaped air bladders on both sides push the skin of the arm towards the middle. For anti-slip purposes, such as... Figure 6 As shown, anti-slip strips 8 or anti-slip raised points can be set on the strip-shaped airbag at the position where it contacts the skin to increase the friction with the skin.

[0068] The strip-shaped air bladders of the first telescopic part 5 and the second telescopic part 6 are inclined downwards, which makes them fit the curve of the arm better. When inflated, the strip-shaped air bladders extend downwards at an angle, which is more conducive to pushing the skin.

[0069] Example 5

[0070] like Figure 8 As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiment 4, the upper and lower sidewalls of the strip-shaped inflatable bladder are provided with elastic bodies 14. The elastic bodies 14 are normally in a contracted state. When the strip-shaped inflatable bladder is not inflated, the elastic bodies 14 cause the strip-shaped inflatable bladder to retract towards the wall of the tightening device groove 2. When the strip-shaped inflatable bladder is inflated, the strip-shaped inflatable bladder overcomes the contractile force of the elastic bodies 14 and extends towards the center of the tightening device groove 2. Figure 9 As shown, this ensures the lateral expansion and contraction of the strip-shaped air bladder, thereby pushing against the skin.

[0071] Example 6

[0072] This embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiment 4 or 5, the air pump and the strip-shaped air bladder of the first telescopic part 5 and the second telescopic part 6 are provided with an electrically controlled valve on the air tube. The electrically controlled valve is electrically connected to the controller 7. The controller 7 controls the opening or closing of the electrically controlled valve, thereby controlling the on / off state of the air tube.

[0073] The electrically controlled valve on the inflation tube controls the opening and closing of the inflation tube. When the inflation pump fills the strip-shaped airbag with air, the electrically controlled valve closes, the inflation pump can stop inflating, and the strip-shaped airbag will not leak air. After puncture, the electrically controlled valve opens, and the strip-shaped airbag deflates and contracts.

[0074] Example 7

[0075] like Figure 10-11 As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiments 1, 2, or 3, the first telescopic part 5 and the second telescopic part 6 respectively include an electric push rod 9 and a clamping strip 10. One end of the housing of the electric push rod 9 is fixed to the inner wall of the tightening device groove 2, and one end of the telescopic rod is connected to the clamping strip 10. The electric push rod 9 and clamping strip 10 of the first telescopic part 5 are arranged opposite to the electric push rod 9 and clamping strip 10 of the second telescopic part 6. The electric push rod 9 is electrically connected to a controller 7, and the controller 7 controls the extension and retraction of the electric push rod 9. The first telescopic part 5 and the second telescopic part 6 may each include one or two sets, as shown in the figure, two sets are arranged sequentially.

[0076] The electric push rods 9 of the first telescopic part 5 and the second telescopic part 6, respectively, push the clamping strips 10 connected to them to extend and retract under the control of the controller 7. When the electric push rods 9 push the clamping strips 10 to move in opposite directions, the clamping strips 10 push against the skin. After puncture, the electric push rods 9 pull the clamping strips 10 to move in the opposite direction, releasing the skin. To prevent slippage, such as... Figure 10 As shown, anti-slip strips 8 or anti-slip protrusions can be provided on the clamping strip 10 at the position where it contacts the skin to increase the friction with the skin.

[0077] To better facilitate the squeezing of loose skin on the lower arm, the electric push rod 9 can be tilted downwards from the outside in, following the tangent of the arm, which makes it easier to fit the arm and squeeze the skin.

[0078] Example 8

[0079] like Figure 13-15 As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on any of embodiments 1-7, the outer wall of the tightening device body 1 is provided with a pipeline fixing groove 11, which is arranged longitudinally along the tightening device body 1; the opening of the pipeline fixing groove 11 is provided with an outwardly opening inclined piece 15.

[0080] The cross-section of the pipeline fixing groove 11 is an open ring, the opening width is smaller than the diameter of the ring, and the diameter of the ring is the same as or slightly smaller than the diameter of the dialysis pipeline 13.

[0081] After the puncture is completed, the arteriovenous dialysis tubing 13 can be fixed in the tubing fixing groove 11 on the outer wall of the tightening device body 1 to prevent the dialysis tubing 13 from moving and causing needle dislodgement or leakage. There can be two tubing fixing grooves 11, which are distinguished by red and blue colors. The opening of the tubing fixing groove 11 is provided with an outwardly flared inclined plate 15 to facilitate the insertion of the dialysis tubing 13.

[0082] Example 9

[0083] like Figure 16-19 As shown, this embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiment 8, the tightening device body 1 is designed as an upper and lower split body, including an upper body 101 and a lower body 102. The upper body 101 is located above the lower body 102, and the upper body 101 and the lower body 102 can be connected and separated. The clamping device 4 and the controller 7 are located in the lower body 102, and the strap 12 is located in the upper body 101.

[0084] The lower part 102 of the main body has push-button latches 16 on both sides, and springs 17 are installed inside the push-button latches 16. Corresponding slots are provided on the upper part 101 of the main body. When the upper part 101 and the lower part 102 of the main body are connected, the protrusion at the top of the push-button latches 16 engages with the slots on the upper part 101 of the main body, thus fixing the upper part 101 and the lower part 102 of the main body together. Pressing the push-button latches 16 against the spring force causes the protrusion at the top of the push-button latches 16 to disengage from the slots on the upper part 101 of the main body, separating the upper part 101 and the lower part 102 of the main body.

[0085] The upper part 101 of the main body is used to fix it to the patient's arm and can move with the patient's arm. After the puncture, the patient can take the upper part 101 with them to the toilet during dialysis. The lower part 102 of the main body stays on the hospital bed to reduce the burden on the arm. The outer wall of the upper part 101 of the main body is provided with a tubing fixing groove 11 for fixing the dialysis tubing 13.

[0086] Example 10

[0087] This embodiment provides a skin tightening device for hemodialysis puncture. Based on embodiment 8, the tightening device body 1 is designed as a split body, including an upper body 101 and a lower body 102. The upper body 101 is located above the lower body 102, and the upper body 101 and the lower body 102 can be connected and separated. The clamping device 4 and the controller 7 are located in the lower body 102, and the strap 12 is located in the upper body 101.

[0088] At least one set of opposing sides of the upper part 101 and the lower part 102 of the main body are provided with spring buckles, and the upper part 101 and the lower part 102 of the main body are connected by spring buckles.

[0089] In various embodiments of this utility model, the tightening body 1 is provided with a battery, which is electrically connected to each electrical component inside the tightening body; or the tightening body 1 is provided with a power interface, which is connected to an external power source through a wire, thereby electrically connecting the power source to each electrical component inside the tightening body and supplying power to each electrical component.

Claims

1. A skin tightening device for hemodialysis puncture, characterized in that: The device includes a clamping body with a longitudinally extending clamping groove. Pads are provided at both ends of the clamping groove. A clamping device is installed within the clamping groove, comprising a first telescopic part and a second telescopic part. The first and second telescopic parts are respectively located on opposite sides inside the clamping groove, enabling opposing movements from both sides towards the center and opposite movements from the center towards both sides. The first and second telescopic parts are strip-shaped inflatable bladders, or they respectively include an electric push rod and a clamping bar. One end of the electric push rod is fixed to the inner wall of the clamping groove, and the other end is connected to the clamping bar. A controller is also provided on the clamping body, electrically connected to the clamping device for controlling the clamping device.

2. The skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The pad at one end of the tightener groove is higher than the pad at the other end.

3. The skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The first telescopic part and the second telescopic part are arranged in opposite directions along the longitudinal direction of the tightener body. The tightener body is also equipped with an air pump, which is connected to the strip-shaped air bladders of the first telescopic part and the second telescopic part respectively through an air pump pipe. The air pump is also electrically connected to a controller, which controls the air pump to turn on or off.

4. A skin tightening device for hemodialysis puncture according to claim 3, characterized in that: The strip-shaped inflatable bladder has an elastic body on its upper and lower side walls or left and right side walls, and the elastic body is normally in a contracted state.

5. A skin tightening device for hemodialysis puncture according to claim 3 or 4, characterized in that: An electrically controlled valve is provided on the inflation tube between the air pump and the strip-shaped inflation bladder of the first and second telescopic parts. The electrically controlled valve is electrically connected to the controller, and the controller controls the opening or closing of the electrically controlled valve, thereby controlling the on / off state of the inflation tube.

6. A skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The electric push rod and clamping bar of the first telescopic part are arranged opposite to the electric push rod and clamping bar of the second telescopic part; the electric push rod is electrically connected to the controller, and the controller controls the extension and retraction of the electric push rod.

7. A skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The first and second telescopic parts are respectively inclined downwards from the outside to the inside.

8. A skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The upper part of the tightening device body is provided with several straps. The straps cross the upper opening of the tightening device groove. One end of the strap is fixedly connected to one side of the outer wall of the tightening device body, and the other end is connected to the other side of the outer wall of the tightening device body by hook and loop fastener or Velcro.

9. A skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The outer wall of the tightening device body is provided with a pipe fixing groove, which is arranged longitudinally along the tightening device body; the opening of the pipe fixing groove is provided with an outwardly opening inclined piece.

10. A skin tightening device for hemodialysis puncture according to claim 1, characterized in that: The tightening device has a split design, including an upper part and a lower part. The upper part is located above the lower part, and the upper and lower parts can be connected or separated. The clamping device and controller are located in the lower part, and the straps are located in the upper part.

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