Infusion system and blood pump assembly thereof

Abstract

The utility model relates to the technical field of medical instruments, in particular to an infusion system and a blood pump assembly thereof, an infusion box comprises a box body and an infusion pump arranged in the box body, a liquid inlet pipe and a liquid outlet pipe respectively extend into the box body from the outside and are communicated with a flow guide connector in the box body, and the flow guide connector is communicated with a pump cavity of the infusion pump through a header pipe. The blood pump assembly comprises the infusion system, and the infusion box is clamped on the blood pump assembly control host. Compared with the prior art, the utility model has the following technical effects: the liquid inlet pipe, the liquid outlet pipe and the header pipe are communicated by adopting the diversion joint, the one-way valve controls the diversion direction, the cleaning liquid safely, stably and smoothly flows into and out of the infusion box at a controlled flow speed under the action of the infusion pump, the pipeline does not need to bear mechanical stress, and the pipe body is not easy to damage; and leakage of cleaning liquid and generation of microbubbles are avoided, the structural design is simple, production is convenient, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an infusion system and its blood pump assembly. Background Technology

[0002] Intravascular blood pumps use micromotors to pump ventricular blood into the vascular system, providing hemodynamic support for heart failure patients. The infusion system provides fluid and allows it to flow out from the gaps in the micromotor's shaft wall, creating a pressure barrier to prevent blood intrusion and simultaneously removing heat from the pump body, thus serving anticoagulant and heat dissipation purposes. A Chinese invention patent application with application number CN202410527170.9 discloses an infusion device in which a transmission mechanism drives a piston in both forward and reverse motion, propelling cleaning fluid into the blood pump at a controlled flow rate. This pump has a complex structure, and the tubing is prone to displacement, damage, and rupture during operation, potentially leading to leakage of cleaning fluid and the generation of microbubbles. Utility Model Content

[0003] The primary objective of this invention is to provide an infusion system that is simple in structure and safe in flow.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An infusion system includes an infusion box, the infusion box including a box body and an infusion pump disposed inside the box body, an inlet pipe and an outlet pipe extending from the outside into the box body and communicating with a flow guide connector inside the box body, the flow guide connector communicating with the pump chamber of the infusion pump through a main pipe.

[0006] Furthermore, the flow guide is a Y-type tee connector; preferably, the inlet pipe and the outlet pipe are located on the same side of the Y-type tee connector, and the main pipe is located on the other side of the Y-type tee connector; more preferably, the pump housing has a fluid inlet at its end, and the main pipe is connected to the fluid inlet through a Luer locking head.

[0007] Furthermore, one-way valves one and two are respectively provided on the inlet pipe and the outlet pipe. The direction of conduction of one-way valve one is that the cleaning fluid flows from the inlet of the inlet pipe to the pump chamber of the infusion pump, and the direction of conduction of one-way valve two is that the cleaning fluid flows from the pump chamber of the infusion pump to the outlet of the outlet pipe. Preferably, one-way valves one and two are arranged near the flow guide joint. More preferably, one-way valves one and two are located inside the housing.

[0008] Furthermore, the infusion pump includes a pump housing and a piston disposed within the pump housing, wherein the piston and the inner wall of the pump housing form a sliding seal fit; preferably, the pump housing is cylindrical.

[0009] Furthermore, the piston is connected to the piston rod, and a rack is provided on the piston rod body that protrudes to the outside of the pump housing. A coupling that protrudes to the outside of the housing is fixed on the housing, and a gear is provided on the coupling. The power drives the rack and gear to mesh and transmit power, thereby driving the piston rod to perform reciprocating linear motion.

[0010] Furthermore, the box body includes upper and lower halves, which are interlocked and ultrasonically welded to seal. The box body is provided with through holes for the inlet pipe, outlet pipe and coupling to pass through.

[0011] Furthermore, a puncture device is provided at the end of the inlet tube, and a drip chamber is provided on the inlet tube near the puncture device.

[0012] Furthermore, the end of the outlet pipe is provided with a rotatable Luer connector; preferably, a sensor is provided on the outlet pipe, and the sensor monitors the pressure information of the cleaning liquid in the outlet pipe in real time.

[0013] Furthermore, an RFID electronic tag is affixed to the inner wall of the box.

[0014] The second objective of this invention is to provide a blood pump assembly, including the infusion system described above, wherein the infusion box and / or sensor are mounted on the control unit of the blood pump assembly, and the power output end of the control unit is connected to the power input end of the coupling.

[0015] Compared with existing technologies, this utility model has the following technical advantages: It uses a flow guide connector to connect the inlet pipe, outlet pipe, and main pipe; a one-way valve controls the flow direction; and the cleaning fluid, under the action of the infusion pump, flows safely, smoothly, and steadily into and out of the infusion box at a controlled flow rate. The pipeline does not need to withstand mechanical stress (e.g., rolling pressure), the pipe body is not easily damaged, and leakage of cleaning fluid and generation of microbubbles are avoided. The simple structural design facilitates production and saves costs. RFID technology is beneficial for identification and traceability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the infusion system.

[0017] Figure 2 This is an outline drawing of the infusion box;

[0018] Figures 3-4 , Figure 6 This is a schematic diagram of the internal structure of an infusion box;

[0019] Figure 5 This is a cross-sectional view of the infusion box;

[0020] Figure 7 This is a schematic diagram of the installation of an infusion system. Detailed Implementation

[0021] The following is combined with Figures 1-7 This utility model will be discussed in further detail.

[0022] An infusion system includes a puncture device 70, a drip chamber 80, an inlet tube 20, an infusion box 10, an outlet tube 30, a sensor 90, and a rotatable Luer connector 100.

[0023] The infusion box 10 includes a box body 11 and an infusion pump 12 disposed within the box body 11. An inlet pipe 20 and an outlet pipe 30 extend from the outside into the box body 11 and connect to a flow guide 13 within the box body 11. The flow guide 13 connects to the pump chamber of the infusion pump 12 via a main pipe 40. By using the flow guide 13 to connect the inlet pipe 20, the outlet pipe 30, and the main pipe 40, the cleaning fluid flows safely, smoothly, and steadily into and out of the infusion box 10 at a controlled flow rate under the action of the infusion pump 12. The tubing does not need to withstand mechanical stress (traditional disc infusion pumps use mechanical squeezing to control the flow rate), the tubing is less prone to breakage, and leakage of cleaning fluid and generation of microbubbles can be avoided, enhancing the safety of the device.

[0024] Specifically, the flow guide 13 is a Y-type tee connector. The inlet pipe 20 and the outlet pipe 30 are located on the same side of the Y-type tee connector, and the main pipe 40 is located on the other side of the Y-type tee connector. The inlet pipe 20, the outlet pipe 30, and the main pipe 40 are tightly connected to and interconnected with the flow guide 13. This simplifies the structural design and reduces the space occupied by the pipeline in the infusion box 10. At the same time, it is easy to assemble and helps to reduce production costs.

[0025] Preferably, the inlet pipe 20 and the outlet pipe 30 are respectively equipped with one-way valves 61 and 62. The direction of one-way valve 61 is that the cleaning fluid flows from the inlet 21 of the inlet pipe 20 to the pump chamber of the infusion pump 12, and the direction of one-way valve 62 is that the cleaning fluid flows from the pump chamber of the infusion pump 12 to the outlet 31 of the outlet pipe 30. The one-way valves 61 and 62 control the direction of the cleaning fluid, which can ensure that the cleaning fluid can flow smoothly through the inlet pipe 20 and the main pipe 40 into the infusion pump 12, and can also ensure that the cleaning fluid flowing out of the main pipe 40 can flow out unidirectionally from the outlet pipe 30.

[0026] Preferably, the one-way valves 61 and 62 are arranged near the flow guide joint 13, making the overall structure more compact.

[0027] To improve the simplicity of the overall design, more preferably, the one-way valves 61 and 62 are located inside the housing 11.

[0028] Specifically, the infusion pump 12 includes a pump housing 121 and a piston 122 disposed inside the pump housing 121. The piston 122 and the inner wall of the pump housing 121 form a sliding seal fit. The end of the pump housing 121 is provided with a fluid inlet 1211. The main pipe 40 is connected to the fluid inlet 1211 through a Luer locking head 50 to ensure the connection and reliability between the structures and further prevent leakage of cleaning fluid.

[0029] Preferably, the pump housing 121 is cylindrical, which facilitates the operation of the piston 122.

[0030] Specifically, the piston 122 is connected to the piston rod 123. A rack 1231 is provided on the piston rod 123, which protrudes to the outside of the pump housing 121. A coupling 14, which protrudes to the outside of the housing 11, is fixed to the housing 11. A gear 141 is provided on the coupling 14. Power drives the rack 1231 to mesh with the gear 141 and drive the piston rod 123 to perform reciprocating linear motion. When the piston rod 123 is pulled away from the fluid inlet 1211, a negative pressure is formed in the pump chamber of the infusion pump 12. The cleaning fluid is sequentially drawn into the pump housing 121 from the inlet pipe 20 and the main pipe 40. When the piston rod 123 is pushed towards the fluid inlet 1211, the cleaning fluid is pushed from the pump housing 121 into the main pipe 40 and the outlet pipe 30. The cycle repeats, and the cleaning fluid moves at a controlled flow rate.

[0031] Specifically, the box body 11 includes upper and lower halves, which are interlocked and sealed by ultrasonic welding. The box body 11 is provided with through holes for the inlet pipe 20, the outlet pipe 30 and the coupling 14 to pass through.

[0032] Specifically, a puncture device 70 is provided at the end of the inlet tube 20, and a drip chamber 80 is provided on the inlet tube 20 adjacent to the puncture device 70. The puncture device 70 establishes a drainage path for the cleaning solution stored in the bag / bottle to enter the inlet tube 20. The drip chamber 80 facilitates the observation of the infusion rate, prevents air from entering the tubing, and acts as a buffer when changing the cleaning solution bag.

[0033] Specifically, the end of the outlet tube 30 is provided with a rotatable Luer connector 100 for easy connection to the blood pump assembly.

[0034] Specifically, a sensor 90 is installed on the outlet pipe 30. The sensor 90 monitors the pressure information of the cleaning liquid in the outlet pipe 30 in real time. The control host receives the relevant signals and adjusts the control strategy of the infusion pump 12 accordingly.

[0035] Preferably, an RFID electronic tag 110 is affixed to the inner wall of the box 11 to serve as a device identifier and to trace the source.

[0036] This utility model also provides a blood pump assembly, which adopts the infusion system described above, wherein the infusion box 10 and the sensor 90 are mounted on the control host A of the blood pump assembly. For example, the power output end of the control host A is connected to the power input end of the coupling 14, and the sensor 90 is placed on the mounting base of the control host A.

[0037] Of course, for those skilled in the art, this utility model is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An infusion system comprising an infusion cassette (10) comprising a cassette body (11) and an infusion pump (12) disposed within the cassette body (11), characterized in that: The inlet pipe (20) and the outlet pipe (30) extend from the outside into the box body (11) and communicate with the flow guide connector (13) in the box body (11), and the flow guide connector (13) communicates with the pump cavity of the infusion pump (12) through the main pipe (40).

2. The infusion system of claim 1, wherein: The flow guide connector (13) is a Y-shaped tee joint; the inlet pipe (20) and the outlet pipe (30) are arranged on the same side of the Y-shaped tee joint, and the main pipe (40) is arranged on the other side of the Y-shaped tee joint.

3. Infusion system according to claim 1 or 2, characterized in that: One-way valves one and two (61, 62) are arranged on the pipelines of the inlet pipe (20) and the outlet pipe (30) respectively; the one-way valve one (61) is arranged in a direction in which the cleaning liquid flows from the inlet (21) of the inlet pipe (20) to the pump cavity of the infusion pump (12), and the one-way valve two (62) is arranged in a direction in which the cleaning liquid flows from the pump cavity of the infusion pump (12) to the outlet (31) of the outlet pipe (30); the one-way valves one and two (61, 62) are arranged adjacent to the flow guide connector (13); and the one-way valves one and two (61, 62) are located inside the box body (11).

4. The infusion system according to any one of claims 1-3, wherein the infusion pump (12) comprises a pump shell (121) and a piston (122) arranged in the pump shell (121), and a sliding sealing fit is formed between the piston (122) and the inner wall of the pump shell (121); the pump shell (121) is cylindrical; and a fluid port (1211) is arranged at the end of the pump shell (121), and the main pipe (40) is connected to the fluid port (1211) through a luer lock (50).

5. The infusion system of claim 4, wherein: The piston (122) is connected to a piston rod (123), a rack (1231) is arranged on the piston rod (123) which protrudes outside the pump shell (121), a coupling (14) which protrudes outside the box body (11) is fixed on the box body (11), a gear (141) is arranged on the coupling (14), and the power driving rack (1231) is in meshing transmission with the gear (141) to drive the piston rod (123) to make a reciprocating linear motion.

6. The infusion system of claim 5, wherein: The box body (11) comprises upper and lower halves which are mutually buckled and ultrasonically welded and sealed, and the box body (11) is provided with through holes through which the inlet pipe (20), the outlet pipe (30) and the coupling (14) pass.

7. The infusion system of any one of claims 1-6, wherein: A puncture device (70) is arranged at the end of the inlet pipe (20), and a drip funnel (80) is arranged on the pipeline of the inlet pipe (20) adjacent to the puncture device (70).

8. The infusion system of any one of claims 1-7, wherein: A rotatable luer joint (100) is arranged at the end of the outlet pipe (30); a sensor (90) is arranged on the pipeline of the outlet pipe (30), and the sensor (90) monitors the pressure information of the cleaning liquid in the outlet pipe (30) in real time.

9. The infusion system of any one of claims 1-8, wherein: An RFID electronic tag (110) is arranged on the inner wall of the box body (11).

10. A blood pump assembly, characterized by: The infusion system according to any one of claims 1-9, wherein the infusion box (10) and / or the sensor (90) are clamped on a control host (A) of a blood pump assembly, and a power output end on the control host (A) is connected to a power input end of the coupling (14).

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