Perfusion backflow device of medical instrument

Abstract

The invention provides a perfusion and backflow device of a medical instrument, which comprises a shell, and a cavity for accommodating a perfusion and backflow assembly is formed in the shell; the perfusion backflow assembly comprises a perfusion tube, a liquid discharge tube, a perfusion tube connecting part and a liquid discharge tube connecting part, the far end of the perfusion tube is detachably connected with the perfusion tube connecting part, and / or the far end of the liquid discharge tube is detachably connected with the liquid discharge tube connecting part; the shell is detachable so that the infusion tube and / or the liquid drainage tube can be replaced conveniently. The shell and the internal elements of the device are detachable, and the shell is convenient for a user to find and replace damaged elements in time, so that the reliability of the device is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a perfusion reflux device for medical devices. Background Art

[0002] The perfusion reflux component of the invasive blood pumping device in the prior art is often arranged on one side of the handle in the form of a side branch. In this solution, the perfusion reflux component is connected to the handle through a connecting tube, and the connecting tube needs to be protected by a silicone joint to prevent it from bending. However, this connection method may cause perfusion fluid leakage due to disconnection of the connecting tube, or mechanical damage to the perfusion reflux component exposed to the outside due to external force, thereby causing perfusion fluid leakage. Although some solutions provide a protective structure for the perfusion reflux component, the protective structure and the perfusion reflux component cannot be disassembled, resulting in the inability to replace the perfusion reflux component when it is damaged, and the function of the perfusion reflux component cannot be restored, and even the invasive blood pumping device cannot be used. Summary of the invention

[0003] In order to overcome at least one of the problems in the related art, the first aspect of the present invention provides a perfusion reflux device for a medical device.

[0004] Wherein, the perfusion reflux device of the medical device comprises a shell, a chamber for accommodating the perfusion reflux component is provided in the shell, and the shell is detachable;

[0005] The perfusion reflux assembly comprises a perfusion tube, a drainage tube, a perfusion tube connection part and a drainage tube connection part, wherein the distal end of the perfusion tube is detachably connected to the perfusion tube connection part, and / or the distal end of the drainage tube is detachably connected to the drainage tube connection part.

[0006] In an optional embodiment, a cavity is provided inside the perfusion tube connection part, and a perfusion seal is provided in the cavity, and a perfusion joint is provided at the distal end of the perfusion tube; when the perfusion joint is inserted into the cavity of the perfusion tube connection part, the spaces on both sides of the perfusion seal are connected, and when the perfusion joint is withdrawn from the cavity of the perfusion tube connection part, the spaces on both sides of the perfusion seal are blocked; and / or,

[0007] A cavity is provided inside the drain pipe connection part, and a drain seal is provided in the cavity, and a drain joint is provided at the far end of the drain pipe; when the drain joint is inserted into the cavity of the drain pipe connection part, the spaces on both sides of the drain seal are connected, and when the drain joint is withdrawn from the cavity of the drain pipe connection part, the spaces on both sides of the drain seal are blocked.

[0008] In an optional embodiment, a notch is provided on the perfusion seal; a protrusion is provided on the perfusion joint; when the perfusion joint is inserted into the cavity of the perfusion pipe connection part, the protrusion of the perfusion joint is assembled with the notch of the perfusion seal, and the spaces on both sides of the perfusion seal are connected; when the perfusion joint is withdrawn from the cavity of the perfusion pipe connection part, the spaces on both sides of the perfusion seal are blocked; and / or,

[0009] A notch is provided on the drainage seal; a protrusion is provided on the drainage joint; when the drainage joint is inserted into the cavity of the drainage pipe connecting part, the drainage joint protrusion is assembled with the notch of the drainage seal, and the spaces on both sides of the drainage seal are connected; when the drainage joint is withdrawn from the cavity of the drainage pipe connecting part, the spaces on both sides of the drainage seal are blocked.

[0010] In an optional embodiment, the perfusion joint is provided with a puncture unit; when the perfusion joint is inserted into the cavity of the perfusion tube connection part, the puncture unit of the perfusion joint penetrates the perfusion seal, and the spaces on both sides of the perfusion seal are connected; when the perfusion joint is withdrawn from the cavity of the perfusion tube connection part, the spaces on both sides of the perfusion seal are blocked; and / or,

[0011] The drainage joint is provided with a puncture unit; when the drainage joint is installed into the cavity of the drainage pipe connecting part, the puncture unit of the drainage joint penetrates the drainage seal, and the spaces on both sides of the drainage seal are connected; when the drainage joint is withdrawn from the cavity of the drainage pipe connecting part, the spaces on both sides of the drainage seal are blocked.

[0012] In an optional embodiment, the cavity of the perfusion tube connection part is connected to the perfusion joint by a threaded connection or a snap-fit ​​connection; and / or the cavity of the drainage tube connection part is connected to the drainage joint by a threaded connection or a snap-fit ​​connection.

[0013] In an optional embodiment, the perfusion tube connection portion includes a perfusion three-way valve, and the perfusion three-way valve includes a first port, a second port and a third port; wherein the first port is connected to an external pipeline, the second port is detachably connected to an external emptying unit, and the third port is detachably connected to the perfusion tube; and / or,

[0014] The drain pipe connection portion includes a drain three-way valve, which includes a first port, a second port and a third port; wherein the first port is connected to an external pipeline, the second port is detachably connected to an external emptying unit, and the third port is detachably connected to the drain pipe.

[0015] In an optional embodiment, the perfusion three-way valve includes a control unit, which is used to adjust the communication between any two of the first port, the second port and the third port, while blocking the communication of the remaining ports; and / or,

[0016] The three-way valve for draining liquid includes a control unit, which is used to adjust the communication between any two of the first port, the second port and the third port, and block the communication of the remaining ports.

[0017] In an optional embodiment, the proximal end of the perfusion tube is connected to at least one of a filter unit, a pressure storage unit and a one-way valve.

[0018] In an optional embodiment, a filling unit is provided at the joint between the perfusion pipe connecting portion and the perfusion pipe; and / or a filling unit is provided at the joint between the drainage pipe connecting portion and the drainage pipe.

[0019] In an optional embodiment, the housing includes an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected.

[0020] In an optional embodiment, a limiting structure is provided on at least one of the upper shell or the lower shell, and the limiting structure is used to limit the elements of the perfusion reflux assembly.

[0021] In an optional embodiment, at least one of the upper shell or the lower shell is made of light-transmitting material.

[0022] In an optional embodiment, at least one of the upper shell and the lower shell is provided with a magnetic unit, and when the upper shell and the lower shell are connected, the upper shell and the lower shell attract each other.

[0023] A second aspect of the present invention provides a pumping system, the pumping system comprising a cable device, the cable device and the perfusion reflux device of any medical device described in the first aspect.

[0024] The technical solution of the present invention has the following advantages or beneficial effects:

[0025] (1) The housing of the perfusion reflux device of the present invention is detachable, and the distal end of the perfusion tube is detachably connected to the perfusion tube connection part, and / or the distal end of the drainage tube is detachably connected to the drainage tube connection part, so that the user can replace the corresponding components in time when the components in the perfusion reflux component are found to be damaged or when the expected life is reached, so as to solve the problem in the prior art that the pumping system cannot be used due to damage to individual components of the perfusion reflux component, and even solve the problem of waste of resources caused by scrapping related components.

[0026] (2) In the present invention, an infusion seal is provided in the infusion tube connection part, and / or a drainage seal is provided in the drainage tube connection part; the infusion seal and drainage seal both have the function of a switch, which can control the connection and disconnection of the space on both sides of the infusion seal and the drainage seal, and are only in a connected state when the pipeline is connected, and are in a blocked state when the pipeline is disassembled, thereby effectively preventing air, pollutants, etc. from entering the infusion tube connection part or the drainage tube connection part, and avoiding air and pollutants, etc. from entering the human body and causing surgical risks. By providing seals in the infusion tube connection part and the drainage tube connection part, the safety issues faced in the replacement process of damaged components are solved at low cost and high reliability.

[0027] (3) The present invention provides notches on the infusion seal and / or the drainage seal to achieve communication between the spaces on both sides of the seal only when the corresponding joints are connected, otherwise the communication between the spaces on both sides is blocked. The notches do not require additional force to achieve the purpose of communication during connection, and are easy for personnel to replace components and control the on-off of the pipeline. In some embodiments, a solid seal is used in conjunction with a puncture structure to control the on-off of the pipeline, which does not require additional processing of the seal, and by controlling the matching relationship between the conventional puncture unit and the seal, the on-off of the pipeline where the seal is located can be controlled at low cost and high efficiency.

[0028] (4) In some embodiments, the three-way valve greatly facilitates the use of operators, and can selectively adjust the connectivity of the pipeline, and can conveniently and quickly handle mixed air and pollutants through an external exhaust unit, which is convenient for users to operate and significantly improves the safety of the use of the equipment.

[0029] (5) By providing a filling unit at the joint, the connection stability between the drain joint and the filling joint is improved, and fluid leakage and contaminants are prevented from entering the pumping system. By providing a magnetic unit, when the upper shell and the lower shell are buckled, the first magnetic unit and the second magnetic unit attract each other, thereby improving the accuracy of the upper and lower shells, and further improving the accuracy of the internal limiting structure to limit the corresponding components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0031] Figure 1 is a partial schematic diagram of a perfusion reflux device of a medical device according to a first embodiment of the present invention;

[0032] Figure 2 is a partial schematic diagram of a perfusion reflux device of a medical device according to a second embodiment of the present invention;

[0033] Figure 3is a partial schematic diagram of a perfusion reflux device of a medical device according to a third embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of the assembly of a perfusion reflux device for a medical device according to a fourth embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of the assembly of a perfusion reflux device for a medical device according to a fifth embodiment of the present invention;

[0036] Figure 6 is a schematic diagram of a first exemplary pumping system according to an embodiment of the present invention;

[0037] Figure 7 is a schematic diagram of a second exemplary pumping system according to an embodiment of the present invention;

[0038] Figure 8 It is a schematic diagram of the connection of the perfusion return pipeline in the prior art. DETAILED DESCRIPTION

[0039] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0040] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0041] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0042] In the prior art, a blood pumping device works in a patient's body to assist blood flow in corresponding organs. For some blood pumping devices, when it pumps blood from the distal end to the proximal end, the blood will correspondingly enter the blood pumping device from the distal end to the proximal end. Therefore, the blood pumping device needs to be injected with perfusion fluid from the proximal and distal ends, and at least part of the perfusion fluid must be discharged into the blood. However, in some blood pumping devices, perfusion fluids such as glucose injected into the blood pumping device are all discharged into the human body after passing through the components in the blood pumping device, causing physical discomfort to the patient. In particular, perfusion waste fluid containing wear particles entering the human body will cause serious risks such as thrombosis. In addition, during the operation of the blood pumping device, the friction pairs of bearings and the like will generate a lot of heat, and local high temperature phenomena will occur. In practice, it is necessary to circulate the perfusion fluid to flush the blood pumping motor to take away the wear particles, heat and thrombus. However, the prior art often uses Figure 8 The pipeline layout shown is that the handle 608 is the center, the distal end is connected to the sheath 609 through the sheath silicone joint, and the proximal end is connected to the cable through the cable protection joint. The cable is only used to transmit electrical signals, such as delivering driving current to the blood pumping motor or transmitting measurement signals of various sensors. The handle also includes a side branch pipeline, such as a connecting tube 803 installed on one side of the handle through a branch silicone joint 802, and the connecting tube 803 is then connected to components such as the liquid medicine filter 106 and the pressure storage valve 105 in sequence. The handle 608 is usually placed on the patient's abdomen when used. The patient's frequent standing and lying will cause the connecting tube to sag under the action of gravity, and be subjected to torsion and pulling forces, which will eventually cause the connecting tube 803 to tear or fail to connect, causing the perfusion fluid to leak. Furthermore, during the patient's standing and lying process, the perfusion assembly will be squeezed, and the liquid medicine filter and the pressure storage valve will be mechanically damaged, resulting in perfusion fluid leakage. The leakage of the above-mentioned perfusion fluid makes it impossible for the motor in the body to be cooled by the perfusion fluid, and the temperature of the motor rises, affecting the patient's internal circulation; at the same time, due to the lack of perfusion fluid for flushing the particles inside the motor in the body, or the inability to effectively treat the thrombus in the motor in the body, the motor bearing is blocked, causing the motor in the body to stop running, and the life of the blood pumping device is greatly reduced. In some schemes, although a shell is added outside the perfusion component to protect the internal perfusion component, the perfusion component may fail due to non-mechanical external forces, such as chemical corrosion (such as isopropyl alcohol, different concentrations of anhydrous ethanol, sodium bicarbonate, etc. corroding the perfusion component). In the prior art, it is impossible to observe the internal components through the shell, resulting in the user being unable to understand the working status of each component in the shell in time. Even more disadvantageous is that both the shell and the perfusion component lack a quick release mechanism, so even if the perfusion component is confirmed to be damaged, the user cannot replace the corresponding component to restore its function. In fact, it can only be scrapped, resulting in a waste of resources.

[0043] In order to solve at least one of the above problems, the first aspect of the present invention provides a perfusion reflux device for medical equipment. The perfusion reflux device for medical equipment includes a shell, a chamber for accommodating a perfusion reflux component is provided in the shell; the perfusion reflux component includes a perfusion tube, a drainage tube, a perfusion tube connection part and a drainage tube connection part, wherein the distal end of the perfusion tube is detachably connected to the perfusion tube connection part, and / or the distal end of the drainage tube is detachably connected to the drainage tube connection part; the shell is detachable to facilitate replacement of the perfusion tube and / or drainage tube.

[0044] An embodiment of the present disclosure provides a medical device in which a perfusion reflux device 605 is used in combination with a sheath 609, a cable device 607, and a fluid pumping device 610 to form a pumping system. A fluid pumping device is provided at the distal end of the sheath, and the proximal end is connected to the cable device 607 and the perfusion reflux device 605 in sequence. The fluid pumping device works in a target environment and is used to transport the fluid in the target environment from the distal end to the proximal end. For example, taking the human body as the target environment, blood is pumped from the distal end to the proximal end in the fluid pumping device. Exemplarily, the fluid pumping device includes a transmission bearing and a transmission shaft, and an impeller unit is provided at the distal end of the transmission shaft. The transmission bearing is used to support the transmission shaft, and the impeller unit is driven by the driving load to rotate at high speed with the transmission shaft. The driving load is transmitted to the fluid pumping device through the perfusion reflux device, the cable device, the sheath, etc. to drive the impeller unit to rotate. In practice, friction pairs such as transmission bearings will generate wear particles during high-speed rotation. If the particles are directly discharged into the human body, medical risks such as thrombosis will occur. Furthermore, when the friction pair rotates at high speed, a large amount of heat will be generated, which will cause local high temperature in the fluid pumping device, resulting in the precipitation of solutes in the perfusion fluid, such as glucose or sodium chloride. And the local high temperature will also affect the properties of the fluid in the target environment, and even affect the normal operation of the fluid in the target environment.

[0045] To this end, an embodiment of the present invention provides a new medical device perfusion reflux device 605, in which a perfusion tube 122 and a drainage tube 121 are integrated to use the perfusion fluid to inhibit blood from entering the fluid pumping device, and to use the perfusion waste fluid to flush out particles, take away heat, lubricate friction pairs, etc. Specifically, the distal end of the drainage tube is connected to the waste liquid discharge channel in the fluid pumping device, and the distal end of the perfusion tube is connected to the perfusion channel of the fluid pumping device. The perfusion fluid entering the fluid pumping device through the perfusion tube will be split, one part will be discharged into the target environment through the perfusion channel of the fluid pumping device, and the other part will enter the waste liquid discharge channel and be used to flush friction pairs such as bearings, thereby discharging particles generated by wear and heat generated by friction from the fluid pumping device, and entering the drainage tube of the medical device's perfusion reflux device through the drainage channel, and then discharged from the proximal end. See, for example Figures 1 to 5In the various embodiments shown, the perfusion reflux device of the medical device includes a shell, and a chamber for accommodating the perfusion reflux component is provided in the shell. In practice, the shell shown may include a hollow upper shell 411 and a hollow lower shell 412, and the chamber is formed by splicing the upper shell and the lower shell. The shell composed of the upper shell and the lower shell is detachable, that is, the upper shell and the lower shell can be separated. The separation includes that the disassembled upper shell and the lower shell are only connected in a local area, or the upper shell and the lower shell are not connected to each other. Regardless of the separation state of the upper shell or the lower shell, the user can replace the damaged components in the perfusion reflux component by disassembling the shell. Further, the perfusion reflux assembly includes a perfusion tube 122, a drainage tube 121, a perfusion tube connection part 111 and a drainage tube connection part 101, wherein the distal end of the perfusion tube is detachably connected to the perfusion tube connection part, and / or the distal end of the drainage tube is detachably connected to the drainage tube connection part; the housing is detachable to facilitate replacement of the perfusion tube and / or drainage tube. In practice, the perfusion tube and / or drainage tube are continuously subjected to chemical corrosion by the perfusion liquid during continuous operation and face the risk of damage. Therefore, how to replace the damaged perfusion tube and / or drainage tube in a timely, convenient and fast manner is a problem that needs to be focused on. To this end, in some embodiments of the present invention, a perfusion tube connection part and a drainage tube connection part are provided in the housing, and at least one of the perfusion tube and the drainage tube is connected to the corresponding connection part in a detachable manner, thereby facilitating replacement of damaged components. The above only takes the detachable drain pipe and the perfusion pipe as an example. In actual use, the corresponding components in the housing can be set to a replaceable connection mode according to the need for replacement so that they can be replaced when they are damaged. It can be seen that compared with the prior art, the present invention sets the housing and the components of the housing in a detachable assembly mode, so that it is convenient for users to replace the corresponding components in time when they are found to be damaged or when the expected life is reached, thereby solving the problem in the prior art that the pumping system cannot be used due to damage to individual components of the perfusion reflux component, and even solves the problem of waste of resources caused by scrapping related components.

[0046] In an optional embodiment, a cavity is defined inside the connection part of the perfusion tube, and a perfusion seal is defined inside the cavity; and / or a cavity is defined inside the connection part of the drainage tube, and a drainage seal is defined inside the cavity; a perfusion joint is defined at the distal end of the perfusion tube, and / or a drainage joint is defined at the distal end of the drainage tube; when the perfusion joint is inserted into the cavity of the connection part of the perfusion tube, the spaces on both sides of the perfusion seal are connected, and when the perfusion joint is withdrawn from the cavity of the connection part of the perfusion tube, the spaces on both sides of the perfusion seal are blocked; here, the spaces on both sides of the perfusion seal refer to the spaces on both sides of the perfusion seal in the direction of fluid flow; and / or when the drainage joint is inserted into the cavity of the connection part of the drainage tube, the spaces on both sides of the drainage seal are connected, and when the drainage joint is withdrawn from the cavity of the connection part of the drainage tube, the spaces on both sides of the drainage seal are blocked; here, the spaces on both sides of the drainage seal refer to the spaces on both sides of the drainage seal in the direction of fluid flow. Figure 1In the illustrated embodiment, the right side of the perfusion reflux assembly is connected to the external perfusion liquid through a pipeline. The perfusion liquid enters the perfusion pipe 122 after passing through the one-way valve 104, the pressure storage valve 105 and the filter 106 in the perfusion reflux device in sequence. Among them, the one-way valve 104 ensures that the perfusion liquid does not flow in the reverse direction when the perfusion assembly components are replaced. The one-way valve shown can be made of PC, PVC, MABS, ABS, PP, PCTG, PVD, Acrylic, etc. The pressure storage valve 105 is used to provide additional filling volume through the expansion chamber during the change of the perfusion liquid pressure, thereby eliminating the pressure fluctuation of the perfusion liquid. The pressure storage valve shown can be made of PC, PVC, MABS, ABS, PC+ABS, etc., and the film in the pressure storage valve that adjusts the pressure fluctuation of the perfusion liquid can be made of silicone, EPDM, TPU, etc. The filter 106 is used to prevent bacterial contamination or air from entering the perfusion tube; the filter is composed of a shell and a filter membrane, and the shell material can be ABS, PC, PC+ABS, PTFE, etc.; the filter membrane material is PES, and the filter pore size is ≤0.5μm. The shape of the filter shown can be rectangular, circular, polygonal, etc., and no specific restrictions are made here. The perfusion liquid flowing through the perfusion tube 122 is transported to the distal end of the catheter through the external perfusion tube 108 and enters the fluid pumping device. The perfusion tube 122 and the external perfusion tube 108 can be made of TPU, PEBAX, PA12, PE, PP, PU, ​​FEP, PTFE, etc. Correspondingly, the reflux pipeline is composed of the drainage tube connection part 101 and the drainage tube 121. The proximal end of the drainage tube is close to the suction mechanism of the end device through the proximal joint 103. The proximal end 103 of the joint can be made of PC, PVC, MABS, ABS, PP, PCTG, PVD, Acrylic, etc. The drainage tube can be made of materials such as TPU, PEBAX, PA12, PE, PP, PU, ​​FEP, PTFE, etc. The distal end of the drainage tube connection part is connected to the external drainage tube 107, and the proximal end of the drainage tube connection part 101 is connected to the drainage tube 121. A cavity is provided inside the perfusion tube connection part 111 to accommodate a perfusion seal (not shown in the figure); a perfusion joint 112 is provided at the distal end of the perfusion tube. When the perfusion joint is installed in the cavity of the perfusion tube connection part, the space on both sides of the perfusion seal is connected, and when the perfusion joint is withdrawn from the cavity of the perfusion tube connection part, the space on both sides of the perfusion seal is blocked. Correspondingly, a cavity is provided inside the drain pipe connection part to install the drain seal; a drain connector 102 is provided at the far end of the drain pipe; when the drain connector is installed into the cavity of the drain pipe connection part, the spaces on both sides of the drain seal are connected, and when the drain connector is withdrawn from the cavity of the drain pipe connection part, the spaces on both sides of the drain seal are blocked.It can be seen that the infusion seal and the drainage seal both have the function of switches, which can control the connection and disconnection of the space on both sides of the infusion seal and the drainage seal, and are only in a connected state when the pipeline is connected, and in a blocked state when the pipeline is disassembled, thereby effectively preventing air, pollutants, etc. from entering the infusion pipe connection part or the drainage pipe connection part, avoiding air and pollutants from entering the human body and causing surgical risks. By arranging seals in the infusion pipe connection part and the drainage pipe connection part, the safety problem faced by the damaged component replacement process is solved at low cost and high reliability.

[0047] In an optional embodiment, the injection seal and / or the drainage seal are provided with a notch; the injection joint is provided with a protrusion, and / or the drainage joint is provided with a protrusion; if the injection joint protrusion is assembled with the notch of the injection seal, the space on both sides of the injection seal is connected; otherwise, the space on both sides of the injection seal is blocked; and / or if the drainage joint protrusion is assembled with the notch of the drainage seal, the space on both sides of the drainage seal is connected; otherwise, the space on both sides of the drainage seal is blocked. Figure 1In the illustrated embodiment, the illustrated infusion seal and / or drainage seal are provided with a notch (not shown in the figure), and the notch is in a closed state in a natural state, that is, air or pollutants cannot pass through the notch. In order to enable the infusion pipe and / or drainage pipe to communicate with the corresponding connection part in the connected state, a protrusion is provided on the infusion joint 112, and a protrusion is also provided on the drainage joint 102. The protrusion is used in conjunction with the notch on the corresponding seal. For example, when the protrusion of the infusion joint cooperates with the notch of the infusion seal, the protrusion will expand the notch, thereby releasing the sealing effect of the notch, and realizing the connection between the infusion pipe and the infusion pipe connection part. When the infusion joint is released from the connection with the infusion pipe connection part, the protrusion of the infusion joint gradually withdraws from the notch of the infusion seal, so that the notch gradually shrinks and returns to a natural state, thereby sealing the infusion pipe connection part, so that air or pollutants cannot enter the infusion pipe connection part. Correspondingly, when the protrusion of the drain joint cooperates with the notch of the drain seal, the protrusion will expand the notch, thereby releasing the sealing effect of the notch, and realizing the connection between the drain pipe and the drain pipe connection part. When the drain joint releases the connection with the drain pipe connection part, the protrusion of the drain joint gradually withdraws from the notch of the drain seal, causing the notch to gradually shrink and restore its natural state, thereby sealing the drain pipe connection part, making it impossible for air or pollutants to enter the drain pipe connection part. The present invention provides a notch on the seal to achieve the connection of the spaces on both sides of the seal only when connected, otherwise the connection of the spaces on both sides is blocked. The notch allows the connection purpose to be achieved without additional force during connection, and is easy for personnel to replace components and control the on-off of the pipeline. In practice, the perfusion connector 112 and / or the drain connector 102 may be a Luer adapter, and the perfusion tube connection portion and the drain tube connection portion are provided with Luer threads, so that the perfusion connector and the perfusion tube connection portion can be quickly and detachably connected, or the drain connector and the drain tube connection portion can be detachably connected, through threaded cooperation. In some embodiments, the notch may be in a variety of forms, including but not limited to a straight or cross shape. In some embodiments, the Luer adapter may be made of PC, PVC, MABS, ABS, PP, PCTG, PVD, Acrylic, etc. Exemplarily, the perfusion seal or the drain seal is a silicone seal. Figures 1 to 3 In the above-mentioned embodiment, the infusion pipe connection part and the drainage pipe connection part are respectively arranged on the left and right sides of the housing, and this layout does not constitute a limitation on the protection scope of the present invention. In actual use, the layout can be flexibly adjusted as needed, for example, both are placed on the left side or on the right side, or one connection part is placed at the far end and the other is placed at the near end, etc.

[0048] When the perfusion tube and / or drainage tube need to be replaced, the user first opens the housing of the perfusion reflux device, and disconnects the perfusion tube connection part and / or drainage tube connection part from the corresponding joint. At this time, the perfusion seal and the drainage seal are in a sealed state, blocking the outside air or pollutants from entering the far end of the pumping system. Then, the user takes out the perfusion tube and / or drainage tube from the housing, and takes out a new perfusion tube and / or drainage tube, and then connects the perfusion joint with the perfusion tube connection part, and / or, connects the drainage joint with the drainage tube connection part. At this time, the raised structure on the joint extends into the notch of the seal, and opens the notch to turn it into a through hole, thereby establishing a liquid path.

[0049] In an optional embodiment, the perfusion connector is provided with a puncture unit, and / or the drainage connector is provided with a puncture unit; if the puncture unit of the perfusion connector penetrates the perfusion seal, the space on both sides of the perfusion seal is connected; otherwise, the space on both sides of the perfusion seal is blocked; and / or, if the puncture unit of the drainage connector penetrates the drainage seal, the space on both sides of the drainage seal is connected; otherwise, the space on both sides of the drainage seal is blocked. Compared with the seal with a notch, in this embodiment, the seal does not have a preset opening structure. To this end, the perfusion connector is provided with a puncture unit 202, and / or the drainage connector is provided with a puncture unit 201, and the puncture unit has a channel passing through the puncture unit. In practice, the puncture unit may be a puncture needle. When the puncture unit pierces the corresponding seal from the side, the perfusion tube and the drainage tube can be connected to the corresponding connecting part. When the puncture unit withdraws from the seal, the elastic properties of the seal's own material will squeeze the small hole left by the puncture and close it to achieve a sealing effect. Specifically, as Figure 2As shown, when the puncture unit 202 of the perfusion joint penetrates the perfusion seal provided in the perfusion connection part, the space on both sides of the perfusion seal is connected by means of the channel in the puncture unit; and when the puncture unit is evacuated from the seal, the seal returns to its original state and the space on both sides of the perfusion seal is blocked. Correspondingly, when the puncture unit of the drainage joint penetrates the drainage seal provided in the drainage pipe connection part, the space on both sides of the drainage seal is connected by means of the channel in the puncture unit; and when the puncture unit is evacuated from the seal, the seal returns to its original state and the space on both sides of the drainage seal is blocked. It can be seen that in some embodiments of the present invention, a solid seal is used in conjunction with a puncture structure to control the on-off of the pipeline, which does not require additional processing of the seal, and the on-off of the pipeline where the seal is located can be controlled at low cost and efficiently by controlling the matching relationship between the conventional puncture unit and the seal. In some embodiments, the seal is a silicone seal. In some embodiments, a slot is provided in the infusion tube connection part and / or on the drainage tube connection part, and buckles are provided on the infusion joint and the drainage joint, and when the buckles and the slots cooperate, the connection of the corresponding pipelines is achieved. In some embodiments, the puncture needle is made of stainless steel, specifically 304, SUS304, 316, SUS316L, etc. The puncture needle specification is between 16G-32G, and the puncture needle has a certain rigidity and toughness, and can effectively puncture the seal without damaging it.

[0050] When the perfusion tube and / or drainage tube needs to be replaced, the user first opens the housing of the perfusion reflux device, then presses the buckle of the perfusion connector and / or the buckle of the drainage connector, and then pulls out the perfusion connector or drainage connector from the slot of the connection part. At this time, the seal is in a sealed state, and outside air or pollutants cannot enter the far end of the pumping system. Then, the user takes out a new perfusion tube or drainage tube, and connects the perfusion connector and / or drainage connector to the corresponding connection part. At this time, the buckle and the slot cooperate to achieve a limiting and fixing effect. At the same time, the puncture unit punctures the seal, and establishes a connecting channel on the left and right sides of the seal through the channel inside the puncture unit.

[0051] In an optional embodiment, the cavity of the perfusion tube connection part is connected to the perfusion joint by a threaded connection or a snap-fit ​​connection; and / or, the cavity of the drainage tube connection part is connected to the drainage joint by a threaded connection or a snap-fit ​​connection. As described above, the threaded connection includes an internal thread on the connection part and an external thread on the joint, so that the two are connected by a thread pair. The snap-fit ​​connection includes a slot on the connection part and a buckle on the joint, so that the two are connected by snapping the buckle with the slot. The above-mentioned connection methods are all for realizing a detachable quick connection at the joint.

[0052] In an optional embodiment, the perfusion tube connection portion includes a perfusion three-way valve, and the perfusion three-way valve includes a first port, a second port, and a third port; wherein the first port is connected to an external pipeline, the second port is detachably connected to an external emptying unit, and the third port is detachably connected to the perfusion tube; and / or, the drainage tube connection portion includes a drainage three-way valve, and the drainage three-way valve includes a first port, a second port, and a third port; wherein the first port is connected to an external pipeline, the second port is detachably connected to an external emptying unit, and the third port is detachably connected to the drainage tube. Figure 3 As shown, the perfusion connection part and the drainage connection part are connected to the corresponding perfusion pipe and drainage pipe through a three-way valve. Specifically, the first port 301 of the perfusion three-way valve is connected to the external perfusion pipe 108, the second port 302 is detachably connected to the external emptying unit (not shown in the figure), and the third port 303 is detachably connected to the perfusion pipe 122. In practice, the proximal end of the external perfusion pipe 108 is connected to the first port 301 through the first connector; the perfusion pipe 122 is connected to the third port through the perfusion connector 112. The first connector and the perfusion connector 112 can both be adapter Luer and have external Luer threads. Correspondingly, the first port and the third port are provided with internal Luer threads, so as to achieve quick connection through internal and external threads. The second port is provided with an internal Luer thread, and the emptying unit can be a syringe, and the syringe has an external Luer thread, so as to achieve the connection between the external emptying unit and the second port through a threaded connection. Correspondingly, the first port 311 of the three-way valve for draining liquid is connected to the external drain pipe 107, the second port 312 is detachably connected to the external emptying unit (not shown in the figure), and the third port 313 is detachably connected to the drain pipe 121. In practice, the proximal end of the external drain pipe 107 is connected to the first port 311 through the second connector; the drain pipe 121 is connected to the third port through the drain connector 102. Both the second connector and the drain connector 102 can be adapted Luer connectors and have external Luer threads. Correspondingly, the first port and the third port are provided with internal Luer threads, so that quick connection is achieved through internal and external threads. The second port is provided with internal Luer threads, and the external emptying unit can be a syringe, and the syringe has external Luer threads, so that the connection between the external emptying unit and the second port is achieved through threaded connection.

[0053] In an optional embodiment, the three-way valve for filling includes a control unit for adjusting the communication between any two of the first port, the second port and the third port, while blocking the communication of the remaining ports; and / or the three-way valve for draining includes a control unit for adjusting the communication between any two of the first port, the second port and the third port, while blocking the communication of the remaining ports. Figure 3As shown, a control unit 304 is provided on the three-way valve for filling, and a control unit 314 is provided on the three-way valve for draining. The functions of the two control units are the same, and the control unit 304 of the three-way valve for filling is used as an example to explain its function. In order to facilitate observation of the conduction state of the three-way valve, the control unit 304 is marked with a switch symbol, such as the OFF mark to indicate that the corresponding port is closed, and the unmarked ports are connected. Figure 3 As shown, when OFF points to the third port 303, the third port is closed, that is, the third port is disconnected from the first port and the second port respectively, and the first port and the second port are connected. It can be understood that when OFF points to the second port 302, the second port is closed, that is, the second port is disconnected from the first port and the third port respectively, and the first port and the third port are connected. When OFF points to the first port 301, the first port is closed, that is, the first port is disconnected from the second port and the third port respectively, and the second port and the third port are connected. The control method of the drainage three-way valve is the same as that of the perfusion three-way valve, which will not be repeated here. When the perfusion tube and / or the drainage tube needs to be replaced, it is only necessary to close the port connected to the perfusion tube and / or the drainage tube to disconnect the connection of the pipeline and prevent air or contaminants from entering the far end of the pumping system. In practice, due to operational errors and other reasons, a small amount of air will appear in the vicinity of the three-way valve. At this time, the port corresponding to the external emptying unit can be opened, and the air can be extracted through the external emptying unit. It can be seen that in this embodiment, the three-way valve greatly facilitates the use of the operator, and can selectively adjust the connectivity of the pipeline, and can conveniently and quickly handle mixed air and pollutants, etc., which is convenient for the user to operate and significantly improves the safety of the use of the equipment.

[0054] When the perfusion tube or the drainage tube needs to be replaced, the user first opens the housing of the perfusion reflux device, and matches the Luer thread of the external emptying unit with the Luer thread of the second port of the three-way valve, and then rotates the OFF mark of the three-way valve to the third port to disconnect it from the perfusion tube or the drainage tube. Since the inner cavity of the three-way valve is in a closed state at this time, external air or pollutants cannot enter the far end of the pumping system. Then, the user takes out the perfusion tube and / or drainage tube in the housing, and connects the new perfusion tube and / or drainage tube to the third port of the three-way valve. Then remove the emptying unit located outside the second port, and rotate the OFF mark to the first port at the same time, and make the perfusion liquid flow, so that the perfusion liquid flows to the second port through the third port of the three-way valve, fills the inside of the pipeline, and discharges air or pollutants, etc. Finally, rotate the OFF mark to the second port so that the liquid path between the first port and the third port is connected.

[0055] In an optional embodiment, the proximal end of the perfusion tube is connected to at least one of a filter unit, a pressure storage unit and a one-way valve.

[0056] In an optional embodiment, a filling unit is provided at the joint between the perfusion tube connection part and the perfusion tube; and / or, a filling unit is provided at the joint between the drainage tube connection part and the drainage tube. In practice, in order to improve the stability of the connection between the drainage joint and the perfusion joint, and to seal the gap at the connection between the perfusion joint and the drainage joint to prevent fluid leakage and contaminants from entering the pumping system, a filling unit may be provided at the joint between the perfusion tube connection part and the perfusion tube; and / or, a filling unit is provided at the joint between the drainage tube connection part and the drainage tube. Exemplarily, the filling unit may be UV glue or epoxy glue, etc.

[0057] In an optional embodiment, the housing includes an upper housing 411 and a lower housing 412, and the upper housing and the lower housing are detachably connected. Figure 4 and 5 In the embodiment shown, the upper shell and the lower shell are connected by a hinge 406 on one side and are detachably connected by a snap-fit ​​method on the other side. The hinge can be set on one side of the long side of the shell or on one side of the short side, and there is at least one hinge. Preferably, two hinges are set to improve the stability of the upper shell and the lower shell when they rotate relative to each other. The hinge can be made of metal material or non-metal material. The corresponding snap-fit ​​structure is set on the side opposite to the hinge to facilitate manual operation. Figure 4 In the illustrated embodiment, at least one buckle 407 is provided on the upper shell. Preferably, there are two buckles to improve the stability of the connection. Exemplarily, the upper portion of the buckle cross-section is an isosceles trapezoid or a right-angled trapezoid, and the lower portion is a rectangle after demolding. Preferably, the bottom surface of the upper trapezoid of the buckle is provided with rounded corners to facilitate the disassembly of the upper shell and the lower shell. The lower shell is provided with a slot 408 that cooperates with the buckle. In other embodiments, at least one of the upper shell or the lower shell is provided with a limiting structure, such as a filter limiting groove 404, a pressure storage valve limiting groove 405, a Luer limiting groove 403, etc. The filter limiting groove 404 is used to limit the filter, the pressure storage valve limiting groove 405 is used to limit the pressure storage valve, and the Luer limiting groove is used to limit the adapter Luer, etc. When the component layout of the perfusion reflux assembly is changed, the layout of the corresponding limiting structure also needs to be adjusted accordingly. As Figure 5 In the embodiment shown, the positions of the Luer limit groove 511 and the pressure storage valve limit groove 512 are similar to those of the embodiment shown in FIG. Figure 4 Preferably, for the same element in the housing, corresponding limiting structures can be provided on both the upper housing and the lower housing to improve the limiting effect of the corresponding element. In addition, Figure 5 In the embodiment shown, the detachable manner between the upper shell and the lower shell is also similar to Figure 4Different. Specifically, a groove 502 is provided on the upper shell, and a buckle 501 is provided on the lower shell, and a detachable connection between the two is achieved through the cooperation of the groove and the buckle. In some embodiments, a guide column 401 is also provided on the upper shell, and a guide groove 402 is provided on the lower shell, and the guide column cooperates with the wire groove to improve the assembly accuracy of the upper shell and the lower shell. In some embodiments, the material of the upper shell and the lower shell can be PC, PC+ABS, PP, PS, PCTG, ABS, PA12, HDPE, LDPE, etc. In some embodiments, a composite cable 416 is also passed through the shell. Figure 4 In the illustrated embodiment, the lower housing is provided with a rectangular groove or a dovetail groove to accommodate the composite cable 416. In some embodiments, the composite cable runs through the entire lower housing and is fixed to the lower housing by glue.

[0058] for Figure 4 In the embodiment shown, before the user replaces the pipeline, the upper shell and the lower shell are in a buckled state. When replacing the pipeline, the user bends the buckle of the upper shell outward to separate it from the buckle surface of the lower shell; and rotates the upper shell along the central axis of the hinge to expose the components of the perfusion reflux assembly. After replacing the components, each component needs to be placed on the corresponding limiting structure in the lower shell. Then, the upper shell is rotated along the central axis of the hinge, and the guide column of the upper shell enters the guide groove of the lower shell, and the upper shell is engaged with the lower shell to fix the components such as the composite cable, perfusion tube and drainage tube to prevent them from loosening and shaking.

[0059] See also Figure 5 In the embodiment shown, the infusion tube and the drainage tube are located on the same side of the lower shell; the lower shell is provided with a composite cable buckle 507, which can be buckled on the composite cable when the lower shell is pressed down, and the composite cable buckle can be radially fixed by the composite cable buckle's own resilience. Figure 4 The embodiments shown are different. Figure 5 In the illustrated embodiment, the housing can be moved along the axial direction of the composite cable 416 to facilitate position adjustment. In some embodiments, both the upper housing and the lower housing are provided with pipeline guide arcs to facilitate the bending and twisting of the pipeline in the housing.

[0060] In an optional embodiment, at least one of the upper shell or the lower shell is made of a light-transmitting material. The light-transmitting material allows visible light to pass through the shell, such as a transparent or translucent material, so that the user can observe the working status of each component in the shell from the outside, and promptly find and replace damaged components.

[0061] In an optional embodiment, at least one of the upper shell and the lower shell is provided with a magnetic unit, and when the upper shell and the lower shell are connected, the upper shell and the lower shell attract each other. Figure 5 In the illustrated embodiment, a first magnetic unit 503 is provided on the upper shell, and a second magnetic unit 504 is provided on the lower shell. The first magnetic unit and the second magnetic unit are equal in number and are positioned relative to each other. Furthermore, the magnetic properties of the magnetic poles of the first magnetic unit and the second magnetic unit are different, thereby achieving the purpose of attracting each other by magnetic poles of different magnetic properties. When the upper shell and the lower shell are buckled, the first magnetic unit and the second magnetic unit attract each other, thereby improving the accuracy of the alignment of the upper and lower shells, and further improving the accuracy of the internal limiting structure limiting the corresponding elements.

[0062] The second aspect of the present invention provides a pumping system, the pumping system comprising a cable device 607, the cable device being connected to the perfusion reflux device 605 of any medical device described in the first aspect. Figure 6 and 7 In the illustrated embodiment, the pumping system includes a fluid pumping device 610, a sheath 609, a handle 608, a cable device 607, an irrigation reflux device 605, and a control device 601. The control device includes an irrigation reflux box 602 and a device connector 606, wherein the irrigation reflux box is used to connect the proximal irrigation tube 603 and the proximal drainage tube 604, and the device connector is used to connect the composite cable to achieve the transmission of measurement signals or the transmission of electricity. The composite cable, the proximal drainage tube, and the proximal irrigation tube are connected to the proximal end of the irrigation reflux device, and the cable device is connected to the distal end of the irrigation reflux device. Figure 7 In the example shown, in order to improve the integration of the system, the proximal drainage tube, the proximal irrigation tube and the composite cable are integrated into one pipeline and connected to the device connector 606.

[0063] The above specific implementation methods do not constitute a limitation on the scope of protection of the present invention. After considering the specification and practicing the technical solutions disclosed in this application, those skilled in the art will easily think of other implementation methods of the present disclosure. This application is intended to cover any modification, use or adaptive changes of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the present disclosure. The description and examples are regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0064] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A perfusion reflux device for medical equipment, Features: It comprises a shell, wherein a chamber for accommodating the perfusion reflux component is provided in the shell, and the shell is detachable; The perfusion reflux assembly comprises a perfusion tube, a drainage tube, a perfusion tube connection part and a drainage tube connection part, wherein the distal end of the perfusion tube is detachably connected to the perfusion tube connection part, and / or the distal end of the drainage tube is detachably connected to the drainage tube connection part.

2. The perfusion reflux device for medical equipment according to claim 1, characterized in that: The perfusion tube connection part has a cavity inside, and a perfusion seal is provided in the cavity, and a perfusion joint is provided at the distal end of the perfusion tube; when the perfusion joint is inserted into the cavity of the perfusion tube connection part, the spaces on both sides of the perfusion seal are connected, and when the perfusion joint is withdrawn from the cavity of the perfusion tube connection part, the spaces on both sides of the perfusion seal are blocked; and / or, A cavity is provided inside the drain pipe connection part, and a drain seal is provided in the cavity, and a drain joint is provided at the far end of the drain pipe; when the drain joint is inserted into the cavity of the drain pipe connection part, the spaces on both sides of the drain seal are connected, and when the drain joint is withdrawn from the cavity of the drain pipe connection part, the spaces on both sides of the drain seal are blocked.

3. The perfusion reflux device for medical equipment according to claim 2, characterized in that: The perfusion seal is provided with a notch; the perfusion joint is provided with a protrusion; when the perfusion joint is inserted into the cavity of the perfusion pipe connection part, the protrusion of the perfusion joint is assembled with the notch of the perfusion seal, and the spaces on both sides of the perfusion seal are communicated; when the perfusion joint is withdrawn from the cavity of the perfusion pipe connection part, the spaces on both sides of the perfusion seal are blocked; and / or, A notch is provided on the drainage seal; a protrusion is provided on the drainage joint; when the drainage joint is inserted into the cavity of the drainage pipe connecting part, the drainage joint protrusion is assembled with the notch of the drainage seal, and the spaces on both sides of the drainage seal are connected; when the drainage joint is withdrawn from the cavity of the drainage pipe connecting part, the spaces on both sides of the drainage seal are blocked.

4. The perfusion reflux device for medical equipment according to claim 2, characterized in that: The perfusion joint is provided with a puncture unit; when the perfusion joint is installed in the cavity of the perfusion tube connection part, the puncture unit of the perfusion joint penetrates the perfusion seal, and the spaces on both sides of the perfusion seal are connected; when the perfusion joint is withdrawn from the cavity of the perfusion tube connection part, the spaces on both sides of the perfusion seal are blocked; and / or, The drainage joint is provided with a puncture unit; when the drainage joint is installed into the cavity of the drainage pipe connecting part, the puncture unit of the drainage joint penetrates the drainage seal, and the spaces on both sides of the drainage seal are connected; when the drainage joint is withdrawn from the cavity of the drainage pipe connecting part, the spaces on both sides of the drainage seal are blocked.

5. The perfusion reflux device for medical equipment according to any one of claims 2 to 4, characterized in that: The cavity of the perfusion pipe connection part is connected to the perfusion joint by threaded connection or snap-fit ​​connection; and / or the cavity of the drainage pipe connection part is connected to the drainage joint by threaded connection or snap-fit ​​connection.

6. The perfusion reflux device for medical equipment according to claim 1, characterized in that: The perfusion pipe connection portion includes a perfusion three-way valve, and the perfusion three-way valve includes a first port, a second port and a third port; wherein the first port is connected to an external pipeline, the second port is detachably connected to an external emptying unit, and the third port is detachably connected to the perfusion pipe; and / or, The drain pipe connection portion includes a drain three-way valve, which includes a first port, a second port and a third port; wherein the first port is connected to an external pipeline, the second port is detachably connected to an external emptying unit, and the third port is detachably connected to the drain pipe.

7. The perfusion reflux device for medical equipment according to claim 6, characterized in that: The perfusion three-way valve comprises a control unit, which is used to adjust the communication between any two of the first port, the second port and the third port, while blocking the communication of the remaining ports; and / or, The three-way valve for draining liquid includes a control unit, which is used to adjust the communication between any two of the first port, the second port and the third port, and block the communication of the remaining ports.

8. The perfusion reflux device for medical equipment according to any one of claims 1-4, 6, and 7, characterized in that: The proximal end of the perfusion tube is connected to at least one of a filter unit, a pressure storage unit and a one-way valve.

9. The perfusion reflux device for medical equipment according to any one of claims 1-4, 6, and 7, characterized in that: A filling unit is provided at the joint between the perfusion pipe connecting portion and the perfusion pipe; and / or a filling unit is provided at the joint between the drainage pipe connecting portion and the drainage pipe.

10. The perfusion reflux device for medical equipment according to any one of claims 1-4, 6, and 7, characterized in that: The housing comprises an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected.

11. The perfusion reflux device for medical equipment according to claim 10, characterized in that: A limiting structure is provided on at least one of the upper shell or the lower shell, and the limiting structure is used to limit the components of the perfusion reflux assembly.

12. The perfusion reflux device for medical equipment according to claim 10, characterized in that: At least one of the upper shell or the lower shell is made of light-transmitting material.

13. The perfusion reflux device for medical equipment according to claim 10, characterized in that: At least one of the upper shell and the lower shell is provided with a magnetic unit, and when the upper shell and the lower shell are connected, the upper shell and the lower shell attract each other.

14. A pumping system, characterized in that: It comprises a cable device, and the cable device is combined with the perfusion reflux device of the medical device as claimed in any one of claims 1 to 13.

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