A blood flow diversion device

Abstract

The utility model relates to medical instrument technical field, especially a kind of blood diversion device, including extraction blood vessel sheath component, backflow blood vessel sheath component, diversion pipeline and filter component, diversion pipeline includes: main cavity pipeline, it is connected between extraction blood vessel sheath component and backflow blood vessel sheath component, filter component is set on main cavity pipeline;Auxiliary cavity pipeline, one end is connected with main cavity pipeline, the other end is connected with backflow blood vessel sheath component;Adjustable valve, it is set in the one end of auxiliary cavity pipeline connection in main cavity pipeline;Microvibration module, it is set in the junction of main cavity pipeline and auxiliary cavity pipeline;Check valve, it is set in the junction of backflow blood vessel sheath component and main cavity pipeline and auxiliary cavity pipeline.The utility model is by being provided with auxiliary cavity pipeline and adjustable valve, realize the accurate regulation to the flow of auxiliary cavity pipeline, can be according to patient real-time blood pressure or treatment demand quick adjustment flow rate, can rapidly increase flow to maintain circulation stability, avoid organ perfusion deficiency or hemolysis risk.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a blood transfer device. Background Technology

[0002] Blood transfer technology plays a vital role in modern medicine, especially in areas such as cardiovascular disease, extracorporeal circulation surgery, blood purification, and organ transplantation. With an aging population and the increase in chronic diseases, the incidence of cardiovascular diseases, end-stage renal disease, and other illnesses is rising year by year, leading to a growing demand for blood transfer devices.

[0003] Traditional blood transfusion devices often use single-lumen tubing with a fixed-flow pump, which cannot dynamically adjust the flow rate according to the patient's real-time blood pressure or treatment needs. For example, in the event of sudden hypotension during surgery, existing equipment struggles to quickly adjust the flow rate to maintain circulatory stability, leading to insufficient organ perfusion or an increased risk of hemolysis. For instance, Chinese invention patent CN114504716A discloses a blood transfusion system in which a speed-regulating unit adjusts the blood flow rate. This mechanical adjustment relies on manual operation and cannot meet the rapid response required for sudden blood pressure fluctuations during surgery, such as massive hemorrhage. Furthermore, the speed-regulating unit is prone to thrombosis in blood-contacting components, such as compression areas of the transfusion tubing. Utility Model Content

[0004] The purpose of this invention is to provide a blood transfer device to solve the problems mentioned in the background art.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: a blood diversion device, comprising an extraction vascular sheath assembly, a return vascular sheath assembly, a diversion conduit, and a filter assembly, wherein the diversion conduit includes:

[0006] A main lumen conduit is connected between the extraction sheath assembly and the return sheath assembly, and the filter assembly is disposed on the main lumen conduit.

[0007] The auxiliary lumen conduit has one end connected to the main lumen conduit and the other end connected to the reflux vascular sheath assembly;

[0008] An adjustable valve is installed at one end of the auxiliary cavity pipeline connected to the main cavity pipeline;

[0009] The micro-vibration module is located at the connection between the main cavity pipeline and the auxiliary cavity pipeline;

[0010] A one-way valve is located at the connection between the reflux vascular sheath assembly and the main lumen conduit and the auxiliary lumen conduit.

[0011] Preferably, the adjustable valve includes:

[0012] Valve seat, connected to the auxiliary cavity pipeline;

[0013] The valve core is rotatably mounted inside the valve seat;

[0014] A miniature motor is mounted on the valve seat to drive the valve core to rotate.

[0015] Preferably, the diameter of the auxiliary cavity conduit is smaller than the diameter of the main cavity conduit.

[0016] Preferably, the micro-vibration module includes:

[0017] The mounting base is fixed to the outer wall of the main cavity pipe;

[0018] A piezoelectric ceramic sheet is disposed in the mounting base and is attached to the outer wall of the main cavity pipe by resin adhesive.

[0019] An elastic element is connected between the mounting base and the piezoelectric ceramic sheet.

[0020] Preferably, the micro-vibration module further includes a first vibration needle and a second vibration needle. One end of the first vibration needle is fixedly connected to the piezoelectric ceramic sheet, and the other end is radially inserted into the main cavity channel. The second vibration needle is disposed on the axis of the main cavity channel and is T-shapedly connected to the first vibration needle.

[0021] Preferably, the reflux vascular sheath assembly, the main lumen conduit, and the auxiliary lumen conduit are connected by a Y-shaped connector, and the one-way valve is located at the end of the Y-shaped connector connected to the reflux vascular sheath assembly.

[0022] Preferably, both the main cavity pipe and the auxiliary cavity pipe are connected to the Y-shaped connector via connecting joints. The connecting joint includes a first joint and a second joint. The first joint has an installation cavity, and the inner wall of the installation cavity has a slot. The second joint includes a handle and a plug-in part. The outer side of the plug-in part has a locking block for engaging with the slot. The slot and the locking block have mutually attracting magnetic elements. A sealing ring is provided on the mating end face of the installation cavity and the plug-in part.

[0023] Preferably, the card slot extends circumferentially along the first connector, one end of the card slot is provided with a latch that extends through to the end face of the first connector, the magnetic suction element is provided at the other end of the card slot, and the width of the card slot gradually decreases from the latch to the magnetic suction element.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model achieves precise regulation of the flow rate of the auxiliary lumen tubing by setting up an auxiliary lumen tubing and an adjustable valve. It can quickly adjust the flow rate according to the patient's real-time blood pressure or treatment needs, and can rapidly increase the flow rate to maintain circulatory stability, avoiding the risk of insufficient organ perfusion or hemolysis.

[0026] 2. By installing a micro-vibration module at the connection between the main lumen and the auxiliary lumen, the blood stagnation and coagulation at this location can be effectively reduced, thus lowering the risk of thrombosis. At the same time, micro-vibration helps prevent the accumulation of air bubbles in the blood, further improving the safety of blood transfer. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram showing the distribution of the adjustable valve and the micro-vibration module in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the connecting joint in an embodiment of this utility model;

[0030] Figure 4 This is an exploded view of the connecting joint in an embodiment of this utility model;

[0031] In the diagram: 1-Extraction vascular sheath assembly, 2-Return vascular sheath assembly, 3-Transfer pipe, 301-Main lumen pipe, 302-Auxiliary lumen pipe, 4-Filter assembly, 5-Adjustable valve, 501-Valve seat, 502-Valve core, 503-Micro motor, 6-Micro vibration module, 601-Mounting base, 602-Piezoelectric ceramic sheet, 603-Elastic element, 604-First vibration needle, 605-Second vibration needle, 7-One-way valve, 8-Y-type connector, 9-Connecting joint, 901-First joint, 9011-Mounting cavity, 9012-Slot, 9013-Bayonet, 902-Second joint, 9021-Handheld part, 9022-Plug-in part, 9023-Card block, 903-Sealing ring, 904-Magnetic suction element. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

[0034] Example:

[0035] like Figure 1As shown, a blood diversion device includes an extraction vascular sheath assembly 1, a return vascular sheath assembly 2, a diversion conduit 3, and a filter assembly 4. The sheath portions of the extraction vascular sheath assembly 1 and the return vascular sheath assembly 2 are inserted into the target blood vessel via micro-puncture technology. The diversion conduit 3 connects the extraction vascular sheath assembly 1 and the return vascular sheath assembly 2. The filter assembly 4 is disposed on the diversion conduit 3 and is used to filter embolic particles in the blood. The outer shell of the filter assembly 4 is made of medical-grade transparent plastic, such as polycarbonate or polypropylene, and the interior of the outer shell contains a mesh or sponge-like filter or a hollow fiber membrane.

[0036] The transfer conduit 3 includes: a main cavity conduit 301 and an auxiliary cavity conduit 302.

[0037] The main lumen conduit 301 connects the extraction sheath assembly 1 and the return sheath assembly 2, and the filter assembly 4 is disposed on the main lumen conduit 301. One end of the auxiliary lumen conduit 302 is connected to the main lumen conduit 301, and the other end is connected to the return sheath assembly 2.

[0038] A one-way valve 7 is installed at the connection between the reflux vascular sheath assembly 2 and the main lumen conduit 301 and the auxiliary lumen conduit 302 to prevent blood from flowing back into the main lumen conduit 301 and the auxiliary lumen conduit 302.

[0039] The diameter of the auxiliary cavity pipe 302 is smaller than that of the main cavity pipe 301. The main cavity diameter is 5-8mm, used for normal flow rates, while the auxiliary cavity diameter is 3-5mm, used for emergency diversion.

[0040] like Figure 2 As shown, an adjustable valve 5 is provided at one end of the auxiliary cavity pipeline 302 connected to the main cavity pipeline 301. The adjustable valve 5 is a butterfly valve, including: a valve seat 501, a valve core 502 and a micro motor 503. The valve seat 501 is fixedly connected to the auxiliary cavity pipeline 302. The valve core 502 is rotatably installed in the valve seat 501. The micro motor 503 is fixedly installed on the valve seat 501 and connected to the valve core 502 for driving the valve core 502 to rotate.

[0041] The filter assembly 4 is equipped with flow sensors at both the upper and lower ends. The flow sensors are linked with the micro motor 503 for control. By monitoring the difference in flow rate between the upstream and downstream of the filter assembly 4, the opening and closing angle of the valve core 502 is controlled to divert the flow, thereby achieving dynamic adjustment of blood flow rate and ensuring precise flow control for different patients or different treatment stages.

[0042] A micro-vibration module 6 is installed at the connection between the main lumen pipe 301 and the auxiliary lumen pipe 302 to reduce blood stagnation and the risk of coagulation in this area.

[0043] like Figure 2As shown, the micro-vibration module 6 includes a mounting base 601, a piezoelectric ceramic sheet 602, and an elastic element 603. The mounting base 601 is fixed to the outer wall of the main cavity pipe 301 by adhesive bonding. The piezoelectric ceramic sheet 602 is disposed inside the mounting base 601 and is adhered to the outer wall of the main cavity pipe 301 by resin adhesive. The elastic element 603 connects the mounting base 601 and the piezoelectric ceramic sheet 602, and uses elasticity to keep the piezoelectric ceramic sheet 602 tightly attached to the outer wall of the main cavity pipe 301.

[0044] The micro-vibration module 6 also includes a first vibrating needle 604 and a second vibrating needle 605. One end of the first vibrating needle 604 is fixedly connected to the piezoelectric ceramic plate 602, and the other end is radially inserted into the main cavity channel 301. The second vibrating needle 605 is disposed on the axis of the main cavity channel 301 and is T-shapedly connected to the first vibrating needle 604. The diameters of the first vibrating needle 604 and the second vibrating needle 605 are between 0.1 and 0.5 mm. The first vibrating needle 604 is bonded and sealed with medical silicone adhesive during the puncture of the main cavity channel 301.

[0045] like Figure 1 As shown, the reflux vascular sheath assembly 2, the main lumen conduit 301, and the auxiliary lumen conduit 302 are connected by a Y-type connector 8. A one-way valve 7 is located at the end of the Y-type connector 8 connected to the reflux vascular sheath assembly 2. Both the main lumen conduit 301 and the auxiliary lumen conduit 302 are connected to the Y-type connector 8 via connectors 9, enabling quick assembly and disassembly of the conduits.

[0046] like Figure 3 and Figure 4 As shown, the connector 9 includes a first connector 901 and a second connector 902. The first connector 901 has a mounting cavity 9011, and the inner wall of the mounting cavity 9011 has a slot 9012. The second connector 902 includes a handle part 9021 and a plug part 9022. The outer side of the plug part 9022 has a locking block 9023 for locking into the slot 9012. The slot 9012 and the locking block 9023 are provided with magnetic suction members 904 that attract each other. A sealing ring 903 is provided on the end face of the mounting cavity 9011 and the plug part 9022 that are in contact with each other.

[0047] The slot 9012 extends circumferentially along the first connector 901. One end of the slot 9012 has a notch 9013 that extends through to the end face of the first connector 901. The width of the slot 9012 gradually decreases from the notch 9013 towards the magnetic member 904. One magnetic member 904 is fixed to the end of the slot 9012, and the other magnetic member 904 is fixed to the front end of the locking block 9023. The two magnetic members 904 can attract each other. During connection, the insertion part 9022 is first inserted into the mounting cavity 9011, and the locking block 9023 enters the notch 9013. Then, the second connector 902 is rotated to move the angle, causing the locking block 9023 to enter the slot 9012 until the two magnetic members 904 are attracted, completing the connection of the connector 9.

[0048] Example of experimental data design:

[0049]

[0050]

[0051] Table 1

[0052] Average flow rate adjustment accuracy 0.58 2.15 ％ <0.001 Average flow regulation response time 3.35±0.55 8.7±1.2 s <0.001 Degree of thrombosis 12.3±1.5 25.8±2.1 ％ <0.001 hemolysis rate 0.21±0.03 0.55±0.05 ％ <0.001 Changes in platelet count -10.2±2.3 -25.6±3.5 ％ <0.001 Changes in white blood cell count -8.5±1.8 -18.3±2.7 ％ <0.001 Changes in red blood cell count -7.8±1.5 -15.4±2.2 ％ <0.001

[0053] Table 2.

Claims

1. A blood diversion device, comprising an extraction vascular sheath assembly (1), a return vascular sheath assembly (2), a diversion conduit (3), and a filter assembly (4), characterized in that, The transfer pipe (3) includes: The main lumen conduit (301) is connected between the extraction sheath assembly (1) and the return sheath assembly (2), and the filter assembly (4) is disposed on the main lumen conduit (301); The auxiliary lumen conduit (302) has one end connected to the main lumen conduit (301) and the other end connected to the reflux vascular sheath assembly (2); An adjustable valve (5) is provided at one end of the auxiliary cavity pipeline (302) connected to the main cavity pipeline (301); The micro-vibration module (6) is located at the connection between the main cavity pipe (301) and the auxiliary cavity pipe (302); A one-way valve (7) is provided at the connection between the reflux vascular sheath assembly (2) and the main lumen conduit (301) and the auxiliary lumen conduit (302).

2. The blood transfer device according to claim 1, characterized in that: The adjustable valve (5) includes: Valve seat (501) is connected to the auxiliary cavity pipeline (302); The valve core (502) is rotatably mounted inside the valve seat (501); A micro motor (503) is mounted on the valve seat (501) and is used to drive the valve core (502) to rotate.

3. The blood transfer device according to claim 1, characterized in that: The diameter of the auxiliary cavity pipeline (302) is smaller than the diameter of the main cavity pipeline (301).

4. The blood transfer device according to claim 1, characterized in that: The micro-vibration module (6) includes: Mounting base (601) is fixed on the outer wall of the main cavity pipe (301); A piezoelectric ceramic sheet (602) is disposed in the mounting base (601) and is attached to the outer wall of the main cavity pipe (301) by resin adhesive; An elastic element (603) is connected between the mounting base (601) and the piezoelectric ceramic sheet (602).

5. A blood transfer device according to claim 4, characterized in that: The micro-vibration module (6) further includes a first vibration needle (604) and a second vibration needle (605). One end of the first vibration needle (604) is fixedly connected to the piezoelectric ceramic sheet (602), and the other end is radially inserted into the main cavity pipe (301). The second vibration needle (605) is arranged on the axis of the main cavity pipe (301) and is T-shaped connected to the first vibration needle (604).

6. A blood transfer device according to claim 1, characterized in that: The reflux vascular sheath assembly (2), the main lumen conduit (301), and the auxiliary lumen conduit (302) are connected by a Y-type connector (8), and the one-way valve (7) is located at the end of the Y-type connector (8) connected to the reflux vascular sheath assembly (2).

7. A blood transfer device according to claim 6, characterized in that: The main cavity pipe (301) and the auxiliary cavity pipe (302) are both connected to the Y-type connector (8) through a connecting joint (9). The connecting joint (9) includes a first joint (901) and a second joint (902). The first joint (901) is provided with an installation cavity (9011). The inner wall of the installation cavity (9011) is provided with a slot (9012). The second joint (902) includes a hand-held part (9021) and a plug-in part (9022). The outer side of the plug-in part (9022) is provided with a locking block (9023) for locking into the slot (9012). The slot (9012) and the locking block (9023) are provided with mutually attractive magnetic suction elements (904). A sealing ring (903) is provided on the mating end face of the installation cavity (9011) and the plug-in part (9022).

8. A blood transfer device according to claim 7, characterized in that: The card slot (9012) extends circumferentially along the first connector (901). One end of the card slot (9012) is provided with a bayonet (9013), which extends through to the end face of the first connector (901). The magnetic suction element (904) is provided at the other end of the card slot (9012). The width of the card slot (9012) gradually decreases from the bayonet (9013) to the magnetic suction element (904).

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