Anti-backflow coagulation infusion device

Abstract

The present application belongs to the technical field of infusion apparatus, especially to a backflow-preventing coagulation infusion apparatus. In view of the problem that the existing technology requires frequent manual care to prevent backflow of the infusion apparatus, the following solution is proposed, which comprises an infusion mechanism body and an execution mechanism hung on an infusion stand. The infusion mechanism comprises an infusion tube, a thin tube, a needle, a liquid level observation capsule, a gas pressure balance branch pipe and a liquid inlet plug. The liquid level observation capsule is a combined structure, and comprises two open half tubes one and two with a cylindrical barrel shape. An annular docking device is fixed between the two half tubes. An alarm mechanism is arranged in the docking device, and the alarm mechanism comprises a detection floating ball arranged in the half tube two. The present application can accurately detect whether there is liquid in the liquid level observation capsule during detection, and then connect the alarm circuit to perform various alarms or directly execute the instruction to cut off the infusion tube.

Description

Technical Field

[0001] This invention relates to the field of infusion set technology, and in particular to an infusion set that prevents backflow and clotting. Background Technology

[0002] Infusion sets are mainly used for intravenous infusion. Traditional infusion sets have a relatively simple structure and cannot fix the medication needle inside the infusion bottle. Often, the medication needle will separate from the bottle due to accidental contact, causing the infusion to be interrupted. In addition, traditional infusion sets cannot stop the infusion in time. When the infusion is about to end, the patient needs to inform the nurse immediately, and the nurse needs to change the medication in time. There are also cases of blood backflow and air column, which puts a heavy burden on nursing care.

[0003] Research revealed that existing technologies typically employ a manual external shut-off valve attached to the main tubing of the infusion set. Once the user can see the IV fluid has finished dripping, they manually shut it off to call a nurse for replacement or needle removal. This method requires the user to concentrate on monitoring the drip status. Another common method uses a ray-shaped clamp attached to the tubing to deflect the IV fluid, triggering an alarm when the fluid runs out. However, this method has a high error and failure rate and can only be used as a supplementary solution. Therefore, we propose a novel anti-backflow infusion set that offers superior safety, effectiveness, and a low failure rate. Summary of the Invention

[0004] To address the problem that existing technologies require frequent manual monitoring to prevent backflow in infusion sets, which is time-consuming and labor-intensive, this invention adopts the following technical solution:

[0005] An anti-backflow and anti-coagulation infusion set includes an infusion mechanism body and an actuator hanging on an infusion stand. The infusion mechanism includes an infusion tube, a thin tube, a needle, a fluid level observation bladder, a pressure balancing branch tube, and an inlet plug. The fluid level observation bladder is a combined structure, and includes two cylindrical tubes, one and the other, with opposite openings. A ring-shaped docking device is fixed between the two tubes. An alarm mechanism is installed inside the docking device, and the alarm mechanism includes a detection float inside the second tube. A spring contact rod extending upward and bending into a V-shape is fixed to the outer wall of the detection float. Furthermore, two symmetrical semi-metallic rings are fixed inside the circumference of the docking device, with their ends not touching each other. An outwardly extending connecting rod is fixed to the outer wall of the two semi-metallic rings at their closest points. When the detection float descends to its lowest point, i.e., when there is no liquid in the liquid level observation chamber, the two ends of the spring contact rod on the detection float descend and simultaneously contact the two semi-metallic rings, thereby activating the alarm circuit. The actuator includes a fixed outer casing, which is a rectangular structure with an internal cavity. A tube clamp is fixed to the side of the fixed outer casing near the bottom. An inclined [device / mechanism] is fixed to the same side of the fixed outer casing as the tube clamp and located behind the tube clamp. An upward-extending grooved slide rail has a boss slider slidably connected inside it. A movable retaining ring, opposite the opening of the tube clamp, is fixed to the side of the boss slider away from the bottom of the groove. An extension rod is fixed to the side of the boss slider near the fixed outer casing, and a permanent magnet is fixed to the end of the extension rod. An electromagnet, compatible with the permanent magnet, is fixed to the end of the grooved slide rail near the inside of the fixed outer casing. Due to the electromagnet and the downward-tilting movable retaining ring, when the alarm mechanism sounds, a section of the infusion tube can be quickly bent into a V-shape, thereby blocking the continued flow of internal fluid and preventing backflow.

[0006] A further feature of this invention is that the docking device includes a docking ring one and a docking ring two, and the opposite sides of the docking ring one and the docking ring two have the same structure, which is used to complete the connection of half-pipe one and half-pipe two; the end of the docking ring two closest to the docking ring one has a retaining clamp with a smaller diameter, which is used to dock the docking ring one and the docking ring two; due to the splicing docking device, the docking device can be installed more conveniently.

[0007] A further feature of this invention is that the inner circumference of the second docking ring has an annular groove, and the two semi-metal rings are symmetrically engaged in the annular groove. The bottom of the annular groove has an insertion hole communicating with the outer side of the second docking ring. The outer circumference of the second docking ring has a pre-reserved eave, and the outer circumference of the eave has a pre-reserved protrusion near the two insertion holes. The upper surface of the protrusion is fixed with a metal connector that is compatible with the wiring rod. The metal connector makes subsequent wire connection more convenient.

[0008] A further feature of the present invention is that a power supply is fixed inside the fixed outer casing near the top, and a control panel is provided on the front of the actuator, and a control switch is provided on the back of the control panel. The control switch, the power supply, and two metal connectors are connected in series in the circuit, and two wires of equal length, wire one and wire two, extend from the top of the fixed outer casing to connect the alarm circuit.

[0009] A further feature of this invention is that a triangular rib plate is fixed between the upper surface of the grooved slide rail and the side of the fixed outer box, and a bending plate extending horizontally to the front is fixed on the front of the triangular rib plate, and the top of the bending plate is set in a knife-edge shape; because of the knife-edge-shaped bending plate, the middle of the infusion tube can be temporarily cut off directly during the interception process to minimize the flow of internal liquid and improve the interception effect.

[0010] A further feature of this invention is that a return spring is fixed on the side of the boss slider near the permanent magnet, and a spring baffle is fixed near the middle of the bottom of the groove of the groove-shaped slide rail. The spring baffle has a sliding hole in the middle that matches the diameter of the extension rod, and the return spring is located between the spring baffle and the boss slider. Because of the return spring, the delivery of the infusion tube can be restored under the action of the return spring after the interception ends, so that the bending point can restore a larger internal flow cross section.

[0011] A further feature of the present invention is that the ends of both wire one and wire two away from the fixed outer casing are fixed with anti-detachment plugs, and the outer circumferential walls of the anti-detachment plugs are provided with anti-slip ridges; this can improve the contact and anti-detachment effect after being inserted into the metal connector.

[0012] A further feature of the present invention is that a sliding block is fixed on the side of the fixed outer box away from the grooved slide rail, and a hook is fixed on the top of the sliding block; a positioning screw is fixed on the side of the sliding block, which can be hung on the infusion stand as needed for easy handling and operation.

[0013] A further feature of this invention is that the four corners of the side of the boss slider near the bottom of the groove are provided with spherical grooves, and each spherical groove is fitted with a ball bearing. The ball bearings allow the electromagnet to pull the infusion tube more smoothly, preventing the actuator from getting stuck after long-term use, which would affect the bending and reaction effect.

[0014] A further feature of the present invention is that two insulating isolation blocks are fixed in the annular groove and are centrally symmetrically distributed. The side of the insulating isolation block away from the bottom of the groove is set into a triangular prism shape, which facilitates the smooth contact of the spring plate contact rod with the two half-metal rings respectively and prevents it from getting stuck at the junction.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. By using the detection float and V-shaped spring contact rod, the system can accurately detect whether there is still liquid in the liquid level observation bladder during detection, and then activate the alarm circuit to issue various alarms or directly execute the command to cut off the infusion tube.

[0017] 2. Due to the installation of an electromagnet and a downward-pulling movable retaining ring, when the alarm mechanism sounds, one section of the infusion tube can be quickly bent into a V-shape, thereby blocking the continued flow of internal fluid to prevent backflow of blood. This also avoids the risk of blood clots entering the body and causing problems. Furthermore, it avoids the pain, economic losses, and delays in treatment caused by re-establishing the tube after blockage.

[0018] 3. Due to the blade-shaped bending plate, the infusion tube can be temporarily cut off in the middle during the interception process to minimize the flow of internal liquid and improve the interception effect.

[0019] 4. Because a return spring is provided, the infusion tube can resume delivery after the interception ends, allowing the bend to regain a larger internal flow cross section. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an anti-backflow coagulation infusion set proposed in this invention;

[0021] Figure 2 This is a top view schematic diagram of an anti-backflow coagulation infusion set proposed in this invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the actuator in an anti-backflow coagulation infusion set proposed in this invention;

[0023] Figure 4 This is a schematic diagram of the assembly structure of the boss slider in an anti-backflow coagulation infusion set proposed in this invention;

[0024] Figure 5 This is an exploded structural diagram of the alarm mechanism in an anti-backflow coagulation infusion set proposed in this invention;

[0025] Figure 6 This is a schematic diagram of the overall structure of the actuator in an anti-backflow coagulation infusion set proposed in this invention;

[0026] Figure 7 This is a schematic diagram of the exploded structure of the second docking ring in an anti-backflow coagulation infusion set proposed in this invention;

[0027] Figure 8 This is a schematic diagram of the structure of an anti-backflow coagulation infusion set proposed in this invention after the alarm mechanism is triggered upon completion of the infusion.

[0028] In the diagram: 1. Actuator; 101. Control panel; 2. Hook; 3. Wire 1; 4. Wire 2; 5. Liquid inlet plug; 501. Pressure balance branch pipe; 6. Half-pipe 1; 7. Connecting ring 1; 8. Connecting ring 2; 81. Semi-metallic ring 1; 82. Socket; 83. Protruding plate; 84. Metal connector; 85. Insulating block; 9. Half-pipe 2; 10. Groove slide rail; 11. Moving retaining ring; 1101. Boss slider; 12. Infusion tube; 13. Thin tube; 131. Needle; 14. Permanent magnet; 15. Tube clamp; 16. Bending plate; 17. Electromagnet; 18. Power supply; 19. Anti-dislodgement plug; 20. Return spring; 21. Spring baffle; 22. Spring contact rod; 23. Detection float. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] In this embodiment, refer to Figure 1-8A blood backflow prevention and coagulation infusion set includes an infusion mechanism body and an actuator 1 hanging on an infusion stand. The infusion mechanism includes an infusion tube 12, a thin tube 13, a needle 131, a fluid level observation bag, a pressure balance branch tube 501, and an inlet plug 5. The fluid level observation bag is a combined structure, and includes two cylindrical tubes 6 and 9 with opposite openings. The fluid level observation bag is made of transparent PVC material, and a ring-shaped docking device is fixed between the two tubes. An alarm mechanism is installed inside the docking device, and the alarm mechanism includes a detection float 23 installed inside the second tube 9. A spring contact rod 22 with an upwardly extending and bent V-shaped structure is fixed on the outer wall of the detection float 23. Furthermore, two symmetrical semi-metallic rings 81 are fixed inside the circumference of the docking device, with their ends not touching each other. Extending connecting rods are fixed to the outer walls of the two semi-metallic rings 81 at their closest points. When the detection float 23 descends to its lowest point, i.e., when there is no liquid in the liquid level observation chamber, the two ends of the spring contact rod 22 on the detection float 23 descend and simultaneously contact the two semi-metallic rings 81, thereby activating the alarm circuit. The actuator 1 includes a fixed outer casing, which is a rectangular structure with an internal cavity. A tube clamp 15 is fixed to the side of the fixed outer casing near the bottom. A grooved slide rail 10 extending obliquely upwards is fixed to the same side of the fixed outer casing and the tube clamp 15, located behind the tube clamp 15. A boss slider 1101 is slidably connected within the grooved slide rail 10. Furthermore, a movable retaining ring 11 opposite to the opening of the tube clamp 15 is fixed on the side of the boss slider 1101 away from the bottom of the groove; an extension rod is fixed on the side of the boss slider 1101 near the fixed outer box, and a permanent magnet 14 is fixed at the end of the extension rod; an electromagnet 17 adapted to the permanent magnet 14 is fixed at the end of the groove slide rail 10 near the inside of the fixed outer box; due to the electromagnet 17 and the inclined downward pulling movable retaining ring 11, when the alarm mechanism sounds during use, one section of the infusion tube 12 can be quickly bent into a V shape, thereby blocking the continued flow of internal fluid to prevent backflow of blood, and also preventing thrombi from entering the body and causing hidden dangers. At the same time, it avoids the pain and economic losses caused to the patient after tube blockage and re-establishment, as well as delays in treatment.

[0031] In this invention, the docking device includes a first docking ring 7 and a second docking ring 8, and the structures on the opposite sides of the first docking ring 7 and the second docking ring 8 are identical, used to complete the connection of the first half-pipe 6 and the second half-pipe 9; the end of the second docking ring 8 near the first docking ring 7 has a retaining clamp with a smaller diameter, used to dock the first docking ring 7 and the second docking ring 8; due to the splicing docking device, the docking device can be installed more conveniently.

[0032] Please refer to Figure 5 and Figure 7The inner circumference of the second docking ring 8 has an annular groove, and the two semi-metal rings 81 are symmetrically engaged in the annular groove. The bottom of the annular groove has a socket 82 that communicates with the outer side of the second docking ring 8. The outer circumference of the second docking ring 8 has a pre-reserved eave, and the outer circumference of the eave has a pre-reserved protrusion 83 near the two sockets 82. The upper surface of the protrusion 83 is fixed with a metal connector 84 that is compatible with the wiring rod. The metal connector 84 makes it easier to connect wires later.

[0033] Please refer to Figure 3 river Figure 6 The power supply 18 is fixed inside the outer casing near the top, and the control panel 101 is set on the front of the actuator 1. The control switch is set on the back of the control panel 101. The control switch, the power supply 18, and the two metal connectors 84 are connected in series in the circuit. Two wires of equal length, wire 3 and wire 4, extend from the top of the outer casing to connect the alarm circuit.

[0034] Please refer to Figure 1 and Figure 3 A triangular rib plate is fixed between the upper surface of the grooved slide rail 10 and the side of the fixed outer box, and a bending plate 16 extending horizontally to the front is fixed on the front of the triangular rib plate, and the top of the bending plate 16 is set in a knife-edge shape; since the bending plate 16 is set in a knife-edge shape, the middle of the infusion tube 12 can be temporarily cut off directly during the interception process to minimize the flow of internal liquid and improve the interception effect.

[0035] Please refer to Figure 3-4 A return spring 20 is fixed on the side of the boss slider 1101 near the permanent magnet 14, and a spring baffle 21 is fixed near the middle of the bottom of the groove of the groove slide rail 10. The spring baffle 21 has a sliding hole in the middle that matches the diameter of the extension rod, and the return spring 20 is located between the spring baffle 21 and the boss slider 1101. Because of the return spring 20, the delivery of the infusion tube 12 can be restored under the action of the return spring 20 after the interception ends, so that the bending point can restore a larger internal flow cross section.

[0036] Please refer to Figure 3 Both wire 3 and wire 4 are fixed with anti-detachment plugs 19 at the ends away from the fixed outer box, and the outer circumference of the anti-detachment plugs 19 is reserved with anti-slip ridges; after being inserted into the metal connector 84, the contact anti-detachment effect can be improved.

[0037] Please refer to Figure 3 A sliding block is fixed on the side of the fixed outer box away from the grooved slide rail 10, and a hook 2 is fixed on the top of the sliding block; a positioning screw is fixed on the side of the sliding block, which can be hung on the infusion stand as needed for easy handling and operation.

[0038] Please refer to Figure 4 The boss slider 1101 has spherical grooves on the side near the bottom of the groove, and each spherical groove is fitted with a ball. Because of the ball, the electromagnet 17 can pull the infusion tube 12 to bend more smoothly, preventing the actuator 1 from getting stuck after long-term use, which would affect the bending and reaction effect.

[0039] Please refer to Figure 7 Two insulating isolation blocks 85 are fixed in the annular groove and are centrally symmetrically distributed. The side of the insulating isolation block 85 away from the bottom of the groove is set into a triangular prism shape, so that the spring plate contact rod 22 can smoothly contact the two half-metal rings 81 respectively and prevent it from getting stuck at the junction.

[0040] When using this device, after the infusion mechanism is inserted into the patient, the middle end of the infusion tube 12 is wound upwards into a U-shape and respectively secured to the tube clamp 15 and the movable retaining ring 11 in the actuator 1; then, the ends of the first wire 3 and the second wire 4 with the anti-dislodgement plug 19 are inserted into the sockets of the metal connector 84, thus activating the alarm circuit; at this time, the actuator 1 is hung in an appropriate position, and the infusion can proceed normally; when the detection float 23 descends to its lowest point, i.e., there is no liquid in the liquid level observation bladder, the two ends of the spring contact rod 22 on the detection float 23 descend and simultaneously contact the two half-metal rings 81, thereby activating the alarm circuit; at this time... Because of the electromagnet 17 and the inclined downward-pulling movable retaining ring 11, when the alarm mechanism sounds, the electromagnet 17 is quickly energized, attracting the nearby permanent magnet 14, which in turn drives the boss slider 1101 and the infusion tube 12 clamped on the movable retaining ring 11 to quickly move obliquely downward towards the other section of the delivery tube 12 on the tube clamp 15; this can quickly bend the infusion tube 12 into a V shape at this point, thereby blocking the continued flow of internal liquid and preventing backflow; in conjunction with the blade-shaped bending plate 16, the middle of the infusion tube 12 can be temporarily cut off directly during the interception process to minimize the flow of internal liquid and improve the interception effect.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An anti-backflow and anti-coagulation infusion set, comprising an infusion mechanism body and an actuator (1) hanging on an infusion stand, wherein the infusion mechanism includes an infusion tube (12), a thin tube (13), a needle (131), a fluid level observation bag, a pressure balancing branch tube (501), and an inlet plug (5), characterized in that, The liquid level observation capsule is a combined structure, and the liquid level observation capsule includes two cylindrical tubes, one (6) and the other (9), with their openings facing each other. A ring-shaped docking device is fixed between the two tubes. An alarm mechanism is provided inside the docking device. The alarm mechanism includes a detection float (23) installed inside the second tube (9). A spring contact rod (22) with an upwardly extending and bent V-shaped structure is fixed on the outer wall of the detection float (23). Two symmetrical semi-metallic rings (81) are fixed inside the circumference of the docking device. The outer walls of the two semi-metallic rings (81) with their ends not in contact with each other are fixed with outwardly extending connecting rods. The actuator (1) includes a fixed outer casing. The outer casing is a rectangular structure with an internal cavity. A pipe clamp (15) is fixed on the side of the outer casing near the bottom. A grooved slide rail (10) extending obliquely upward is fixed on the side of the outer casing and the pipe clamp (15) and behind the pipe clamp (15). A boss slider (1101) is slidably connected inside the grooved slide rail (10). A movable retaining ring (11) opposite to the opening of the pipe clamp (15) is fixed on the side of the boss slider (1101) away from the bottom of the groove. An extension rod is fixed on the side of the boss slider (1101) near the outer casing. A permanent magnet (14) is fixed at the end of the extension rod. An electromagnet (17) compatible with the permanent magnet (14) is fixed at the end of the grooved slide rail (10) near the inside of the outer casing. A triangular rib is fixed between the upper surface of the grooved slide rail (10) and the side of the fixed outer box, and a bending plate (16) extending horizontally to the front is fixed on the front of the triangular rib, and the top of the bending plate (16) is set in the shape of a knife edge.

2. The anti-backflow and anti-coagulation infusion set according to claim 1, characterized in that, The docking device includes docking ring one (7) and docking ring two (8), and the structures of docking ring one (7) and docking ring two (8) on the opposite side are the same, which is used to complete the connection of half pipe one (6) and half pipe two (9); docking ring two (8) has a clamp with a smaller diameter reserved at the end near docking ring one (7), which is used to dock docking ring one (7) and docking ring two (8).

3. The anti-backflow and anti-clotting infusion set according to claim 2, characterized in that, The inner circumference of the second docking ring (8) has an annular groove, and the two semi-metallic rings (81) are symmetrically engaged in the annular groove. The bottom of the annular groove has an insertion hole (82) that communicates with the outer side of the second docking ring (8). The outer circumference of the second docking ring (8) has a pre-reserved eave, and the outer circumference of the eave has a pre-reserved protrusion (83) near the two insertion holes (82). The upper surface of the protrusion (83) is fixed with a metal connector (84) that is compatible with the connecting rod.

4. The anti-backflow and anti-coagulation infusion set according to claim 3, characterized in that, The power supply (18) is fixed inside the fixed outer box near the top, and the control panel (101) is provided on the front of the actuator (1), and the control switch is provided on the back of the control panel (101). The control switch, the power supply (18), and the two metal connectors (84) are connected in series in the circuit, and two wires of equal length, one (3) and two (4), extend from the top of the fixed outer box to connect the alarm circuit.

5. The anti-backflow and anti-coagulation infusion set according to claim 1, characterized in that, A return spring (20) is fixed on the side of the boss slider (1101) near the permanent magnet (14), and a spring baffle (21) is fixed near the middle of the groove bottom of the groove of the groove slide rail (10). The spring baffle (21) has a sliding hole in the middle that matches the diameter of the extension rod, and the return spring (20) is located between the spring baffle (21) and the boss slider (1101).

6. The anti-backflow and anti-clotting infusion set according to claim 4, characterized in that, The ends of wire 1 (3) and wire 2 (4) away from the fixed outer box are both fixed with anti-detachment plugs (19), and the outer circumference of the anti-detachment plugs (19) is reserved with anti-slip ridges.

7. The anti-backflow and anti-coagulation infusion set according to claim 1, characterized in that, A sliding block is fixed on the side of the fixed outer box away from the grooved slide rail (10), and a hook (2) is fixed on the top of the sliding block; a positioning screw is fixed on the side of the sliding block.

8. The anti-backflow and anti-coagulation infusion set according to claim 1, characterized in that, The boss slider (1101) has spherical grooves on the side near the bottom of the groove, and each spherical groove is fitted with a ball.

9. The anti-backflow and anti-coagulation infusion set according to claim 3, characterized in that, Two insulating isolation blocks (85) are fixed in the annular slot, and the side of the insulating isolation block (85) away from the bottom of the slot is set into a triangular prism shape.

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