Hemodialysis liquid stopping clamp

Abstract

The hemodialysis liquid stopping clamp comprises an elastic clamp body, the elastic clamp body is provided with a bent deformation part, an upper clamping part and a lower clamping part, the upper clamping part and the lower clamping part are connected to the two ends of the deformation part respectively, so that the upper clamping part and the lower clamping part can be close to each other or away from each other, and the front end of the upper clamping part is provided with a hook part extending towards the lower clamping part. The hook part is provided with at least one clamping hook which can be hooked at the end of the lower clamping part when the upper clamping part gets close to the lower clamping part so that the elastic clamp body can be in a locked state, the deformation part is provided with a first through hole for a blood path tube to penetrate through, and the hook part is provided with a second through hole for the blood path tube to penetrate through. The opposite sides of the upper clamping part and the lower clamping part are both connected with rollers, when the elastic clamp body is in a locked state, the two rollers flatten the blood path pipe, and rotating structures are arranged between the rollers and the elastic clamp body so that the elastic clamp body can slide along the blood path pipe when the elastic clamp body is in the locked state. According to the hemodialysis liquid stopping clamp, the efficiency is improved, the safety is improved, and the operation is more convenient.

Description

Technical Field

[0001] The present invention particularly relates to a hemodialysis fluid-stopping clamp. Background Art

[0002] Hemodialysis (HD) is one of the main renal replacement therapies for patients with end-stage renal disease (ESRD). At the end of dialysis treatment, the blood in the extracorporeal circulation circuit needs to be safely and efficiently returned to the patient's body. This process is called "blood return". The extracorporeal circulation circuit generally used for hemodialysis is called the blood circuit tube. The efficiency of the blood return operation directly affects the timeliness of clinical treatment, and its safety is related to the control of the residual volume in the blood circuit tube. Efficient blood return can reduce the patient's red blood cell loss, reduce the dosage of erythropoietin (EPO) and the cost of anemia-related treatment, thereby improving the patient's long-term quality of life. At present, the commonly used blood return methods in clinical practice mainly include one-way open blood return method and closed two-way blood return method, but both have defects to varying degrees, especially in patients with arteriovenous fistula hypertension. These defects include:

[0003] 1. The one-way open blood return method requires disconnecting the arterial line during the blood return process and separating the patient's access and dialysis blood line with a saline syringe for blood return. However, this method has problems such as a high risk of infection. The blood in the line is repeatedly exposed to air, increasing the possibility of bacterial contamination and cross-infection (see the paper "Application of an Improved Closed Blood Return Method in Hyperbaric Dialysis Patients with Internal Fistulas" in the journal "Jilin Medicine" with publication number CN: 22-1115 / R). The one-way open blood return method is cumbersome to operate, requiring frequent switching of the blood pump and separation of the patient's vascular access and extracorporeal circulation blood line, which can easily lead to nurse errors (such as blood-stained gloves and needle detachment).

[0004] 2. Closed two-way blood return method. The 2021 edition of the "Standard Operating Procedures for Blood Purification" recommends the use of a closed two-way blood return method to reduce the risk of infection. This method uses normal saline gravity to return blood, but the following problems still exist: it is not suitable for patients with high-pressure fistulas. When the pressure of the patient's arteriovenous fistula is too high, normal saline is difficult to overcome vascular resistance, resulting in blood return failure (see the paper "Application of Finger Pressure Anastomosis Method in Closed Blood Return of Patients with High-Pressure Arteriovenous Fistulas in Hemodialysis" in the journal "Clinical Medical Engineering" with publication number CN: 44-1655 / R). Currently, finger pressure anastomosis method or squeezing normal saline bag method is often used in clinical practice to assist in blood return. However, the finger pressure anastomosis method requires the nurse to manually press the fistula anastomosis, and pressure control depends on experience. Excessive force can easily lead to vascular spasm or thrombosis, and insufficient force cannot effectively return blood. The pressure of squeezing normal saline bag is unstable, which may cause blood residue or patient discomfort (such as numbness and pain in the arm).

[0005] In response to the above problems, the prior art has proposed some improvement solutions, such as:

[0006] 1. Improved method of pressurized infusion bag

[0007] Some studies have used pressurized infusion bags to replace traditional gravity blood return (see the paper "Application of Improved Closed Blood Return Method Using Pressurized Infusion Bags in Patients with Internal Fistula High-Pressure Dialysis" in the "Collection of Abstracts of Papers from the 3rd Shanghai International Nursing Conference"). Although this shortens the blood return time, there are still problems such as inaccurate pressure control and large amounts of saline solution used.

[0008] 2. Closed blood return method without stopping pumping

[0009] Continuous blood return can be achieved by adjusting the blood pump speed (see the paper "Research Progress on Blood Return Methods in Hemodialysis Treatment" in the journal "Nursing Research" with publication number CN: 14-1272 / R), but this method is highly dependent on the equipment and is not suitable for all dialysis machine models.

[0010] Summary of core issues of existing technologies:

[0011] 1. Inaccurate pressure control: Existing auxiliary blood return methods (such as finger pressure and squeezing saline bags) are difficult to provide stable and adjustable pressure, affecting the blood return effect.

[0012] 2. Complex operation: Some methods have special requirements for equipment (liftable infusion pole, bagged saline) or cumbersome operations (finger pressure on internal fistula or squeezing infusion bag), which increases the burden of clinical operation.

[0013] 3. Infection risk: Open blood return or separation and reconnection of the tube may still lead to contamination.

[0014] 4. Risk of fistula injury: Improper pressure application may accelerate fistula stenosis or thrombosis.

[0015] The present invention is just produced based on above-mentioned deficiency. Summary of the Invention

[0016] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a hemodialysis fluid-stopping clamp that improves efficiency, improves safety, and is more convenient to operate.

[0017] The present invention is achieved through the following technical solutions:

[0018] The clamping member is adapted to engage the lower end of the clamping member and engage with the lower end of the clamping member so that the clamping member can move relative to the clamping member when the clamping member is in the locked position.

[0019] As described above, in the hemodialysis liquid-stopping clamp, the direction from the first perforation to the second perforation is the tube running direction, and the rotation center axis of the roller is perpendicular to the tube running direction.

[0020] As described above, the hemodialysis liquid-stopping clamp, the rotating structure includes shaft end grooves provided on the upper clamping part and the lower clamping part, and a rotating shaft provided on the roller and capable of being inserted into the shaft end grooves.

[0021] As described above, the hemodialysis liquid-stopping clamp, the upper clamping part and the lower clamping part are each provided with two mounting plates, the roller is connected between the two mounting plates, the shaft end groove is arranged on the inner side of the mounting plate, the mounting plate is also provided with a mounting notch for the rotating shaft to slide into the shaft end groove, and the mounting plate is also provided with an inclined guide part with a thickness gradually increasing from the mounting notch to the shaft end groove.

[0022] As described above, the hemodialysis liquid-stopping clamp, the inner side wall of the mounting plate is further provided with a reinforcing rib, and the reinforcing rib is provided with an avoidance notch matching the shape of the roller.

[0023] In the hemodialysis liquid-stopping clamp as described above, the shaft end of the rotating shaft is provided with an arc-shaped guide sliding surface.

[0024] In the hemodialysis liquid-stopping clamp as described above, the roller is provided with an elastic wrapping layer covering its cylindrical surface and used to increase the friction coefficient.

[0025] As described above, the hemodialysis liquid-stopping clamp has an upper friction rib on the upper side of the upper clamping portion for increasing friction during manual pressing operation, and a lower friction rib on the lower side of the lower clamping portion for increasing friction during manual pressing operation.

[0026] The hemodialysis fluid-stopping clamp described above, wherein the elastic clamp body is made of elastic plastic or memory metal into an integral structure

[0027] In the hemodialysis fluid-stopping clamp as described above, the second perforation extends from the hook portion to the upper clamping portion.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. Improved blood return efficiency and speed: The hemodialysis stop clamp of this invention uses a roller structure that slides along the blood line in a locked state, generating a directional pressure differential. This, combined with gravity, creates a mechanical supercharger effect. This design overcomes the flow limitations of traditional gravity-based blood return, increasing the blood return rate and shortening the return time for patients with hypertension caused by internal fistulas, significantly improving the efficiency of blood return operations.

[0030] 2. Simplify the operation process and reduce the risk of clotting. The locked state design of the elastic clamp allows medical personnel to clamp the blood circuit tubing and then push it to slide. This "one clamp, one push" continuous operation reduces the number of operation steps, avoids blood flow stagnation and clotting caused by frequent operation, and reduces the risk of clotting in the extracorporeal circulation tubing.

[0031] 3. Enhanced adaptability for hypertensive patients. Addressing the clinical pain points of patients with arteriovenous fistulas, the roller's continuous compression and sliding mechanism provides stable pressurization while completely closing the circuit. Tests have shown that this design can maintain effective blood return even at venous pressures as high as 100 mmHg, resolving the applicability issues of traditional closed blood return methods for hypertensive patients.

[0032] 4. Optimized ergonomics. The modular mounting structure, comprised of a rotating shaft and tilting guide, allows for quick assembly and disassembly of the rollers, ensuring smooth operation. Clinical testing has shown that this design reduces nurses' single blood return operation time by 30% while also reducing the incidence of vasospasm associated with traditional acupressure techniques (from 12% to 2%), ensuring both safety and ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the hemodialysis liquid-stopping clamp in use according to the first embodiment;

[0034] Figure 2 This is a cross-sectional view of the use state of the hemodialysis liquid-stopping clamp of Example 1 Figure 1 ;

[0035] Figure 3 This is a cross-sectional view of the use state of the hemodialysis liquid-stopping clamp of Example 1 Figure 2 ;

[0036] Figure 4 This is a partial structural exploded view of the hemodialysis fluid-stopping clamp of Example 1;

[0037] Figure 5 4 is a cross-sectional schematic diagram of the hemodialysis liquid-stopping clamp of the second embodiment. DETAILED DESCRIPTION

[0038] The invention will be further described below with reference to the accompanying drawings:

[0039] The directions described in the specification of the present invention, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions in the accompanying drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the invention and are not a limitation on its implementation method.

[0040] Example 1

[0041] This embodiment introduces a hemodialysis fluid-stopping clamp, such as Figures 1 to 4 As shown, the hemodialysis liquid-stopping clamp includes an elastic clamp body 1, which has a curved deformation part 11, an upper clamping part 12 and a lower clamping part 13 respectively connected to the two ends of the deformation part 11, so that the upper clamping part 12 and the lower clamping part 13 can move closer to or away from each other, and the front end of the upper clamping part 12 is provided with a hook part 14 extending toward the lower clamping part 13, and the hook part 14 is provided with at least one hook 141 that can be hooked on the end of the lower clamping part 13 when the upper clamping part 12 moves closer to the lower clamping part 13, so that the elastic clamp body 1 is in a locked state, as shown in FIG. Figure 3 The figure shows the locked state. The deformation portion 11 is provided with a first through-hole 15 for the blood tube A to pass through. The hook portion 14 is provided with a second through-hole 16 for the blood tube A to pass through. Figure 1 and Figure 2 As shown, the blood tube for blood return passes through the first through hole 15 and the second through hole 16 in the left and right directions. The upper clamping part 12 and the lower clamping part 13 are connected to the roller 2 on the opposite sides of each other. The blood tube A located between the first through hole 15 and the second through hole 16, as shown in FIG. Figure 3As shown, when the elastic clamp 1 is in a locked state, the two rollers 2 clamp the blood tube A flat, and a rotating structure is provided between the rollers 2 and the elastic clamp 1, which allows the rollers 2 to rotate relative to the elastic clamp 1, so that the elastic clamp 1 can slide along the blood tube A when it is in a locked state. When the elastic clamp 1 slides along the blood tube A, the two rollers 2 rotate and keep pressing the blood tube A at the same time. In this way, when the medical staff is operating, they can push the elastic clamp 1 toward the human body after clamping the blood tube A with the elastic clamp 1 without releasing it, so that the liquid inside the blood tube A forms a directional pressure difference before and after the elastic clamp 1, thereby improving the efficiency of blood return. This method breaks through the limitations of the traditional gravity blood return method and is particularly suitable for patients with fistulas and venous hypertension. The blood return efficiency is improved by mechanical supercharging and gravity effect. In addition, the operation of moving the elastic clamp 1 in the locked state significantly shortens the blood return time of the blood tube before the pump, shortens the blood pump stop time, and significantly reduces the risk of coagulation.

[0042] As a preferred method of this embodiment, Figure 3 As shown, the direction from the first through-hole 15 to the second through-hole 16 is the tube running direction P, and the rotation center axis of the roller 2 is perpendicular to the tube running direction, that is, the tube running direction P is along the left-right direction, and the rotation center axis of the roller 2 is along the front-back direction, so that the elastic clamp 1 can slide smoothly along the blood tube A after clamping the blood tube A.

[0043] In order to enable the roller 2 to be rotatably connected to the elastic clamp 1, as shown in FIG. Figure 4 As shown, the rotating structure includes shaft end grooves 17 provided on the upper clamping portion 12 and the lower clamping portion 13 , and a rotating shaft 21 provided on the roller 2 and capable of being inserted into the shaft end grooves 17 .

[0044] In order to facilitate the installation and connection of the roller 2 on the elastic clamp 1, as shown in FIG. Figure 4 As shown, the upper clamping portion 12 and the lower clamping portion 13 are each provided with two mounting plates 18, and the roller 2 is connected between the two mounting plates 18. The shaft end groove 17 is provided on the inner side of the mounting plate 18. The mounting plate 18 is also provided with a mounting notch 181 for the rotating shaft 21 to slide into the shaft end groove 17. The mounting plate 18 is also provided with an inclined guide portion 182 with a thickness gradually increasing from the mounting notch 181 to the shaft end groove 17. The shaft end of the rotating shaft 21 of the roller 2 is then inserted from the mounting notch 181 into the shaft end groove 17 along the inclined guide portion 182, thereby achieving installation and connection. During the process, the mounting plate 18 is slightly deformed, making the structure compact and stable. As a further preferred solution, the shaft end of the rotating shaft 21 is provided with an arc-shaped guide surface 211 to facilitate the insertion of the roller 2 into the shaft end groove 17.

[0045] In order to improve the structural strength of the mounting plate 18, as Figure 4As shown, the inner side wall of the mounting plate 18 is further provided with a reinforcing rib 183 , and the reinforcing rib 183 is provided with an avoidance notch 184 that matches the shape of the roller 2 .

[0046] As a preference, Figures 1 to 3 As shown, the upper side surface of the upper clamping portion 12 is provided with an upper friction rib 121 for increasing friction when pressed by a human hand. Similarly, the lower side surface of the lower clamping portion 13 is provided with a lower friction rib 131 for increasing friction when pressed by a human hand.

[0047] As a preference, Figures 1 to 3 As shown, the second through hole 16 extends from the hook portion 14 to the upper clamping portion 12 .

[0048] Preferably, the elastic clamp body 1 is made of elastic plastic or memory metal as an integral structure, preferably medical grade elastic plastic.

[0049] Example 2

[0050] This embodiment introduces a hemodialysis fluid-stopping clamp, such as Figure 5 As shown, this type of hemodialysis liquid-stopping clamp differs from Example 1 in that: two or more hooks 141 are provided on the hook portion 14; the roller 2 is provided with an elastic wrapping layer 22 covering its cylindrical surface and used to increase the friction coefficient. The elastic wrapping layer 22 can be made of medical silicone, which can increase the friction coefficient, ensure the rolling of the roller 2, and ensure that the elastic clamp body 1 can slide smoothly.

[0051] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A hemodialysis fluid-stopping clamp, characterized by: The invention comprises an elastic clamping body (1), wherein the elastic clamping body (1) has a curved deformation part (11), an upper clamping part (12) and a lower clamping part (13) respectively connected to the two ends of the deformation part (11), so that the upper clamping part (12) and the lower clamping part (13) can move closer to or away from each other, and the front end of the upper clamping part (12) is provided with a curved hook part (14) extending toward the lower clamping part (13), and the curved hook part (14) is provided with at least one hook (141) that can be hooked on the end of the lower clamping part (13) when the upper clamping part (12) moves closer to the lower clamping part (13), so that the elastic clamping body (1 ) is in a locked state, the deformation portion (11) is provided with a first through-hole (15) for the blood tube to pass through, the hook portion (14) is provided with a second through-hole (16) for the blood tube to pass through, the upper clamping portion (12) and the lower clamping portion (13) are connected with rollers (2) on opposite sides of each other, when the elastic clamping body (1) is in a locked state, the two rollers (2) clamp the blood tube flat, and a rotating structure is provided between the rollers (2) and the elastic clamping body (1) to enable the rollers (2) to rotate relative to the elastic clamping body (1), so that the elastic clamping body (1) can slide along the blood tube when it is in a locked state.

2. The hemodialysis fluid-stopping clamp according to claim 1, characterized in that: The direction from the first through hole (15) to the second through hole (16) is the pipe running direction, and the rotation center axis of the roller (2) is perpendicular to the pipe running direction.

3. The hemodialysis fluid-stopping clamp according to any one of claims 1 or 2, characterized in that: The rotating structure comprises shaft end grooves (17) arranged on the upper clamping part (12) and the lower clamping part (13), and a rotating shaft (21) arranged on the roller (2) and capable of being inserted into the shaft end grooves (17).

4. The hemodialysis fluid-stopping clamp according to claim 3, characterized in that: The upper clamping portion (12) and the lower clamping portion (13) are both provided with two mounting plates (18), the roller (2) is connected between the two mounting plates (18), the shaft end groove (17) is arranged on the inner side of the mounting plate (18), the mounting plate (18) is further provided with a mounting notch (181) for the rotating shaft (21) to slide into the shaft end groove (17), and the mounting plate (18) is further provided with an inclined guide portion (182) whose thickness gradually increases from the mounting notch (181) to the shaft end groove (17).

5. The hemodialysis fluid-stopping clamp according to claim 4, characterized in that: The inner side wall of the mounting plate (18) is further provided with a reinforcing rib (183), and the reinforcing rib (183) is provided with an avoidance notch (184) matching the shape of the roller (2).

6. The hemodialysis fluid-stopping clamp according to claim 4, characterized in that: The shaft end of the rotating shaft (21) is provided with an arc-shaped guide sliding surface (211).

7. The hemodialysis fluid-stopping clamp according to any one of claims 1 or 2, characterized in that: The roller (2) is provided with an elastic wrapping layer (22) covering its cylindrical surface and used to increase the friction coefficient.

8. The hemodialysis fluid-stopping clamp according to any one of claims 1 or 2, characterized in that: The upper side surface of the upper clamping portion (12) is provided with an upper friction rib (121) for increasing friction when a human hand presses the clamping portion, and the lower side surface of the lower clamping portion (13) is provided with a lower friction rib (131) for increasing friction when a human hand presses the clamping portion.

9. The hemodialysis fluid-stopping clamp according to any one of claims 1 or 2, characterized in that: The elastic clamp (1) is an integrated structure made of elastic plastic or memory metal.

10. The hemodialysis fluid-stopping clamp according to any one of claims 1 or 2, characterized in that: The second through hole (16) extends from the hook portion (14) to the upper clamping portion (12).

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