Liquid pump, liquid filling system, and medical microcirculation device

Abstract

Provided are a liquid pump (10), a liquid filling system, and a medical microcirculation device. The liquid pump (10) comprises a pump body (100), a filling and withdrawing mechanism (200), and an exhaust mechanism (300). The pump body (100) is provided with a liquid storage cavity (110), an exhaust cavity (120), and a transition cavity (130) for connecting the liquid storage cavity (110) and the exhaust cavity (120). The transition cavity (130) is located above the liquid storage cavity (110) and is in communication with the liquid storage cavity (110). The pump body (100) is further provided with an interface (140) for connecting a balloon catheter (30), and the interface (140) is in communication with the transition cavity (130). At least a portion of the filling and withdrawing mechanism (200) is located within the liquid storage cavity (110) and is capable of reciprocating along an axial direction of the liquid storage cavity (110), so as to perform filling and / or withdrawing of a balloon. At least a portion of the exhaust mechanism (300) is located within the exhaust cavity (120) and is capable of reciprocating along an axial direction of the exhaust cavity (120), so as to enable the exhaust cavity (120) to be in communication with or disconnected from the outside. The liquid pump (10) can solve the clinical problems of gas embolism caused by gas leakage and complicated exhaust operation.

Description

Liquid pumps, filling systems and medical microcirculation equipment Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a liquid pump, a liquid filling system and a medical microcirculation device. Background Art

[0002] Percutaneous coronary intervention (PCI) is primarily used to treat obstructive coronary artery disease. It has rapidly developed due to its minimally invasive, time-saving, safe, and effective advantages. However, coronary artery obstruction can sometimes cause ischemic damage to a portion of the myocardium. Ischemia primarily affects the coronary microcirculatory system. Microcirculatory abnormalities can cause a portion of the myocardium to enter hibernation, suspended animation, or even death, leading to severe acute myocardial infarction. Insufficient microcirculatory perfusion cannot be treated with conventional PCI procedures. Conventional microcirculatory treatment currently involves obstructing blood flow in the sinus venosus, increasing vascular pressure and allowing blood to return to the microcirculatory system. This increased pressure also creates a flushing effect. A medical microcirculatory device, combining a pressurizing device with a balloon catheter, is currently a treatment option for microcirculatory obstruction. This method involves placing a balloon in the coronary sinus and repeatedly inflating and defusing it through the device, intermittently occluding the sinus and achieving both blood backflow and flushing.

[0003] However, existing medical microcirculation equipment has the following problems:

[0004] 1. Medical microcirculatory devices are continuous-use active devices, typically used for 2 hours. During prolonged use, accidental leakage of the filling medium may pose irreversible risks. Furthermore, the filling medium is a gas (helium), and leakage in blood vessels can cause gas embolism, which can lead to death in severe cases.

[0005] 2. Existing medical microcirculation devices integrate the air pump and main unit, making maintenance a major pain point. Once a problem arises with an integrated medical device, repairs are time-consuming and costly. Replacing key functional components is essentially the same as purchasing new equipment, further straining medical resources. The pump, as a key functional component in microcirculation devices, is particularly prone to failure, resulting in significant consequences.

[0006] It should be noted that the information disclosed in the background technology section of the invention is only intended to deepen the understanding of the general background technology of the invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0007] The purpose of the present invention is to provide a liquid pump, a liquid filling system and a medical microcirculation device, which can not only fill the balloon by filling the liquid to solve the problem of gas embolism caused by gas leakage and endangering the patient's life safety in clinical practice, but also solve the problem of complex exhaust operation.

[0008] In order to solve the above technical problems, the present invention provides a liquid pump for medical microcirculation equipment, wherein the liquid pump includes a pump body, a filling and withdrawal mechanism and an exhaust mechanism; the pump body has a liquid storage chamber, an exhaust chamber and a transition chamber for connecting the liquid storage chamber and the exhaust chamber, and the transition chamber is located above the liquid storage chamber and is connected to the liquid storage chamber; the pump body is also provided with an interface for connecting a balloon catheter, and the interface is connected to the transition chamber; at least a part of the filling and withdrawal mechanism is located in the liquid storage chamber and can move back and forth along the axial direction of the liquid storage chamber to fill and / or withdraw the balloon; at least a part of the exhaust mechanism is located in the exhaust chamber and can move back and forth along the axial direction of the exhaust chamber to connect or separate the exhaust chamber from the outside.

[0009] Optionally, the filling and retraction mechanism includes a connected transmission assembly and a piston, the piston includes a connected push rod and a push head, the push head is located in the liquid storage chamber, at least a portion of the push rod is located outside the liquid storage chamber and is transmission-connected to the transmission assembly, and the transmission assembly is used to be connected to a power device to drive the push rod and the push head to reciprocate axially along the liquid storage chamber under the drive of the power device.

[0010] Optionally, the transmission assembly includes a coupling and a gear coaxially connected to each other, the push rod is connected to the gear transmission, and the coupling is used to be connected to the power device.

[0011] Optionally, one side of the push rod has a plurality of tooth structures for meshing with the gear.

[0012] Optionally, the push rod is eccentrically connected to the gear via a connecting piece.

[0013] Optionally, the end of the liquid storage chamber close to the transition chamber has a tapered section, and the inner diameter of the tapered section close to the transition chamber is smaller than the inner diameter of the tapered section away from the transition chamber.

[0014] Optionally, the exhaust mechanism includes a press key, an air valve and an exhaust rod, the top end of the exhaust rod is connected to the press key, and the air valve is movably mounted on the exhaust rod; the pump body also has an installation cavity connected to the exhaust chamber, the installation cavity is connected to the outside world, the press key and the top end of the exhaust rod are both located in the installation cavity, the press key can move back and forth along the axial direction of the installation cavity, the bottom end of the exhaust rod is located in the exhaust chamber, and the air valve is located at the connection between the installation cavity and the exhaust chamber; when the press key is in the initial position, the bottom end of the exhaust rod can seal the bottom end of the air valve to separate the exhaust chamber from the installation cavity; when the press key is pressed, the exhaust rod can move relative to the air valve toward the direction close to the transition chamber to connect the exhaust chamber with the installation cavity.

[0015] Optionally, the liquid pump also includes a locking member movably connected to the cavity wall of the installation cavity, the locking member is located below the push button and above the air valve, at least a portion of the locking member is located outside the installation cavity, and the locking member is configured to abut against the push button when exhaust is not required, so that the exhaust mechanism is in a locked state.

[0016] Optionally, the exhaust rod includes a connected rod body and a sealing head, the diameter of the sealing head is larger than the diameter of the rod body, the top end of the rod body is connected to the push button, the air valve has a first through hole and a second through hole that are interconnected, the second through hole is located below the first through hole, the inner diameter of the second through hole is larger than the inner diameter of the first through hole, the second through hole is used for the sealing head to penetrate, and is interference connected with the sealing head, and the first through hole is used for the rod body to pass through.

[0017] Optionally, the exhaust mechanism further includes an elastic member connected to the push key or the exhaust rod, and the elastic member is configured to drive the exhaust rod and the push key to return to their respective corresponding initial positions when the external force applied to the push key is eliminated.

[0018] Optionally, the exhaust mechanism also includes an air valve switch provided in the installation cavity, the air valve switch is sleeved on the exhaust rod, the air valve switch is located above the air valve, the diameter of the air valve switch is larger than the inner diameter of the first through hole, and when the push button is in the initial position, the distance between the air valve switch and the air valve is greater than the depth of the second through hole.

[0019] Optionally, the exhaust mechanism further includes a ball valve, which is connected to the bottom end of the exhaust rod, and one end of the exhaust chamber close to the transition chamber has an air inlet adapted to the ball valve.

[0020] Optionally, a limiting member is further provided in the installation cavity, and the limiting member is provided between the push button and the air valve.

[0021] In order to solve the above technical problems, the present invention further provides a liquid filling system, which includes a host and a liquid pump as described in any one of the above items, and the host and the liquid pump are detachably connected.

[0022] In order to solve the above technical problems, the present invention further provides a medical microcirculation device, which includes a balloon catheter and the liquid filling system described above.

[0023] Compared with the prior art, the liquid pump, liquid filling system and medical microcirculation equipment provided by the present invention have the following beneficial effects:

[0024] The liquid pump provided by the present invention includes a pump body, a filling and withdrawing mechanism and an exhaust mechanism; the pump body has a liquid storage chamber, an exhaust chamber and a transition chamber for connecting the liquid storage chamber and the exhaust chamber, the transition chamber is located above the liquid storage chamber and is connected to the liquid storage chamber; the pump body is also provided with an interface for connecting a balloon catheter, the interface is connected to the transition chamber; at least a portion of the filling and withdrawing mechanism is located in the liquid storage chamber and can reciprocate along the axial direction of the liquid storage chamber to fill and / or withdraw the balloon; at least a portion of the exhaust mechanism is located in the exhaust chamber and can reciprocate along the axial direction of the exhaust chamber to connect or isolate the exhaust chamber from the outside. Thus, the liquid pump provided by the present invention can fill the balloon by filling it with liquid by providing the liquid storage chamber and the filling and withdrawing mechanism, thereby reducing the risk of gas embolism caused by gas leakage during the use of the product. In addition, the liquid pump provided by the present invention can solve the problem of complex exhaust operation by providing the transition chamber, the exhaust chamber and the exhaust mechanism, so that the exhaust requirements can be met during the filling process. In addition, the liquid pump provided by the present invention can be used as a disposable split functional component / consumable, making the maintenance of the liquid pump simpler and more convenient.

[0025] Since the liquid filling system and the medical microcirculation device provided by the present invention both include the liquid pump provided by the present invention, the liquid filling system and the medical microcirculation device provided by the present invention have at least all the beneficial effects of the liquid pump provided by the present invention. For details, please refer to the above description of the beneficial effects of the liquid filling system and the medical microcirculation device provided by the present invention, so they will not be repeated here. In addition, since the liquid in the liquid pump is connected to the balloon, when the balloon ruptures in the human blood vessel, the liquid pump and the liquid therein will be in direct contact with the human blood. Therefore, each clinical use requires disinfection and sterilization of the liquid pump. The liquid filling system and medical microcirculation equipment provided by the present invention are provided by setting the host and the liquid pump as a detachable structure, so that the liquid pump can be sterilized by the manufacturer and provided in a sterile form. In clinical use, the user can directly use a new sterile liquid pump each time. The liquid in the liquid pump uses sterile saline or other sterile liquid in the operating room, thereby avoiding the hospital user's repeated disinfection and sterilization of the liquid filling system and the medical microcirculation equipment, and thus solving the problem that each clinical use requires disinfection and sterilization of the liquid pump and the host when the liquid pump is integrated. In addition, by setting the host and the liquid pump as a detachable structure, the maintenance of the liquid pump is simple and convenient. When the liquid pump is damaged, a new liquid pump can be quickly installed on the host. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of the overall structure of a liquid pump provided in one embodiment of the present invention;

[0027] FIG2 is a schematic diagram of the connection structure between the transmission assembly and the power device according to one embodiment of the present invention;

[0028] FIG3 is a schematic diagram of the connection structure between the transmission assembly and the piston according to another embodiment of the present invention;

[0029] FIG4 is a schematic structural diagram of an exhaust mechanism in a locked state according to an embodiment of the present invention;

[0030] FIG5 is a schematic structural diagram of an exhaust mechanism in a released state provided by one embodiment of the present invention;

[0031] FIG6 is a schematic structural diagram of an exhaust mechanism according to an embodiment of the present invention when exhausting gas;

[0032] FIG7 is a schematic structural diagram of the air valve switch in the exhaust mechanism provided by one embodiment of the present invention when sealing the top end of the air valve;

[0033] FIG8 is a schematic structural diagram of the exhaust rod in the exhaust mechanism provided by one embodiment of the present invention when resealing the bottom end of the air valve;

[0034] FIG9 is a schematic diagram of the connection structure between the exhaust rod and the air valve according to one embodiment of the present invention;

[0035] FIG10 is a cross-sectional view of a gas valve provided in one embodiment of the present invention;

[0036] FIG11 is a schematic diagram of a partial structure of a depressing key in an exhaust mechanism provided by one embodiment of the present invention when the depressing key is in an initial position;

[0037] FIG12 is a schematic structural diagram of a push button in an exhaust mechanism provided in another embodiment of the present invention when the push button is in an initial position;

[0038] FIG13 is a schematic structural diagram of an exhaust mechanism according to another embodiment of the present invention when exhausting gas;

[0039] FIG14 is a schematic diagram of the overall structure of a liquid pump provided in another embodiment of the present invention;

[0040] FIG15 is a block diagram of a liquid filling system according to an embodiment of the present invention;

[0041] FIG16 is a block diagram of a medical microcirculation device according to an embodiment of the present invention.

[0042] The accompanying drawings are numbered as follows: Pump body 100; Liquid storage chamber 110; Conical section 111; Exhaust chamber 120; Air inlet 121; Transition chamber 130; Interface 140; Mounting chamber 150; Limiting member 151; Locking member 160; Filling and withdrawing mechanism 200; Transmission assembly 210; Coupling 211; Gear 212; Piston 220; Push rod 221; Toothed structure 2211; Push head 222; Connecting member 230; Exhaust mechanism 300; Press button 310; Air valve 320; First through hole 321; Second through hole 322; Exhaust rod 330; Rod body 331; Sealing head 332; Ball valve 340; Elastic member 350; Air valve switch 360; Liquid pump 10; Main unit-20; power unit-21; balloon catheter-30. DETAILED DESCRIPTION

[0043] The following is a detailed description of the liquid pump, liquid filling system, and medical microcirculation device proposed in the present invention, in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the purpose of the embodiments of the present invention. To make the purposes, features, and advantages of the present invention more readily apparent, please refer to the accompanying drawings. It should be noted that the structures, proportions, and sizes illustrated in the drawings of this specification are intended solely to facilitate understanding and reading by those skilled in the art, and are not intended to limit the implementation of the present invention. Any structural modifications, changes in proportions, or adjustments in size, provided they produce the same or similar effects and achieve the same objectives, should still fall within the scope of the technical content disclosed herein. The specific design features of the present invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and environment in which they are intended. Furthermore, in the embodiments described below, the same reference numerals may be used across different drawings to represent the same parts or parts with the same functions, and their repeated descriptions may be omitted. In this specification, similar reference numerals and letters are used to refer to similar items, so once an item is defined in one figure, it need not be further discussed in subsequent figures. In addition, if the method described herein includes a series of steps, the order in which the steps are presented herein is not necessarily the only order in which the steps can be performed, and some of the steps described may be omitted and / or some other steps not described herein may be added to the method.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations, nor should they be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Moreover, the terms "comprises," "includes," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element. The singular forms "a", "an" and "the" include plural referents, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", the term "at least two" is generally used in a sense including "two or more", and the term "multiple" is generally used in a sense including "at least two".

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like, indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise expressly specified or limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium; they can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] The core idea of ​​the present invention is to provide a liquid pump, a liquid filling system and a medical microcirculation device, which can fill the balloon by filling the liquid. Not only can the balloon be filled by filling the liquid to solve the problem of gas embolism caused by gas leakage and endangering the patient's life safety in clinical practice, but also the problem of complicated exhaust operation can be solved. In addition, the present invention can also solve the problem of difficult maintenance of integrated products. It should be noted that, as can be understood by those skilled in the art, the medical microcirculation device in the present invention can be used not only in the field of coronary sinus balloon counterpulsation, but also in other fields, and the present invention is not limited to this.

[0047] To realize the above idea, the present invention provides a liquid pump for use in medical microcirculation equipment. Please refer to FIG1 , which is a schematic diagram of the overall structure of a liquid pump provided in one embodiment of the present invention. As shown in Figure 1, the liquid pump 10 provided by the present invention includes a pump body 100, a filling and withdrawal mechanism 200 and an exhaust mechanism 300; the pump body 100 has a liquid storage chamber 110, an exhaust chamber 120 and a transition chamber 130 for connecting the liquid storage chamber 110 and the exhaust chamber 120, the transition chamber 130 is located above the liquid storage chamber 110 and is connected to the liquid storage chamber 110; the pump body 100 is also provided with an interface 140 for connecting a balloon catheter 30 (see Figure 16), the interface 140 is connected to the transition chamber 130; at least a portion of the filling and withdrawal mechanism 200 is located in the liquid storage chamber 110 and can reciprocate along the axial direction of the liquid storage chamber 110 to fill and / or withdraw the balloon; at least a portion of the exhaust mechanism 300 is located in the exhaust chamber 120 and can reciprocate along the axial direction of the exhaust chamber 120 to connect or separate the exhaust chamber 120 from the outside.

[0048] Thus, the liquid pump 10 provided by the present invention can fill the balloon by filling it with liquid by providing the liquid storage chamber 110 and the filling and withdrawing mechanism 200, thereby reducing the risk of gas embolism caused by gas leakage during the use of the product. In addition, the liquid pump 10 provided by the present invention can solve the problem of complex exhaust operation by providing the transition chamber 130, the exhaust chamber 120 and the exhaust mechanism 300, so that the exhaust demand can be met during the filling process. In addition, the liquid pump 10 provided by the present invention can be used as a disposable split functional component / consumable, making the maintenance of the liquid pump 10 simpler and more convenient.

[0049] It should be noted that, as will be understood by those skilled in the art, before inflating the balloon, the pump body 100 can be connected to a reservoir containing a filling fluid via its interface 140. The filling fluid in the reservoir can then be withdrawn into the liquid storage chamber 110 via the filling and withdrawal mechanism 200 until the liquid storage chamber 110 is completely filled with the filling fluid. The interface 140 on the pump body 100 can then be connected to the balloon. Before cyclically inflating the balloon, the gas in the pump body 100 can be exhausted via the exhaust mechanism 300 to prevent gas from entering the balloon. The filling fluid in the liquid storage chamber 110 can then be delivered to the balloon via the filling and withdrawal mechanism 200 to inflate the balloon. It should also be noted that, as will be understood by those skilled in the art, the gas can be exhausted when the exhaust chamber 120 is connected to the outside world via the exhaust mechanism 300. It should also be noted that, as will be understood by those skilled in the art, the interface 140 can be, but is not limited to, a Luer connector or a special interface adapted for a dedicated balloon catheter.

[0050] 1 , as shown in FIG1 , in some exemplary embodiments, the filling and withdrawing mechanism 200 includes a transmission assembly 210 and a piston 220 connected thereto. The piston 220 includes a push rod 221 and a push head 222 connected thereto. The push head 222 is located within the liquid storage chamber 110. At least a portion of the push rod 221 is located outside the liquid storage chamber 110 and is in transmission connection with the transmission assembly 210. The transmission assembly 210 is configured to be connected to a power device 21 (see FIG2 ) so as to be driven by the power device 21 to drive the push rod 221 and the push head 222 to reciprocate along the axial direction of the liquid storage chamber 110. Thus, the power device 21 can drive the transmission assembly 210 to drive the push rod 221 and the push head 222 to reciprocate along the axial direction of the liquid storage chamber 110, thereby transferring the filling liquid in the liquid storage chamber 110 into the balloon to fill the balloon, or withdrawing the liquid from the balloon to withdraw the balloon. Specifically, as shown in Figure 1, when the push rod 221 and the push head 222 move to the right under the drive of the power device 21 and the transmission assembly 210, the filling liquid in the liquid storage chamber 110 can be transported to the balloon to fill the balloon; when the push rod 221 and the push head 222 move to the left under the drive of the power device 21 and the transmission assembly 210, the liquid in the balloon can be drawn back to retract the balloon.

[0051] Please continue to refer to Figures 1 and 2, wherein Figure 2 is a schematic diagram of the connection structure of the transmission assembly 210 and the power unit 21 provided in one embodiment of the present invention. As shown in Figures 1 and 2, in some exemplary embodiments, the transmission assembly 210 includes a coupling 211 and a gear 212 coaxially connected, the push rod 221 is transmission-connected to the gear 212, and the coupling 211 is used to connect to the power unit 21. Thus, by configuring the transmission assembly 210 to include a structure including the connected coupling 211 and the gear 212, not only can the overall structure of the liquid pump 10 provided by the present invention be simplified, but it can also be more convenient to connect the liquid pump 10 provided by the present invention to the power unit 21 through the coupling 211. Specifically, the gear 212 can be driven by the power unit 21 to perform rotational motion, and the rotating gear 212 can drive the push rod 221 transmission-connected thereto to perform linear motion, and the push head 222 can follow the push rod 221 to perform linear motion synchronously. It should be noted that, as those skilled in the art will appreciate, the power device 21 for driving the gear 212 to perform rotational motion may be a rotary motor or a rotary cylinder.

[0052] 1 , as shown in FIG1 , in some exemplary embodiments, one side of the push rod 221 has a plurality of tooth-like structures 2211 for meshing with the gear 212. Thus, the gear 212 can be driven by the power device 21 to rotate, and the rotating gear 212 can drive the meshed push rod 221 to drive the push head 222 to perform linear motion along the axial direction of the liquid storage chamber 110.

[0053] Please continue to refer to Figure 3, which illustrates a schematic diagram of the connection structure between a transmission assembly 210 and a piston 220 according to another embodiment of the present invention. As shown in Figure 3, in other exemplary embodiments, the push rod 221 is eccentrically connected to the gear 212 via a connector 230. Thus, the power unit 21 can drive the gear 212 to rotate, and the rotating gear 212 can drive the push rod 221, to which it is eccentrically connected, to cause the push head 222 to move linearly along the axis of the liquid storage chamber 110.

[0054] Specifically, one end of the connecting member 230 is fixedly connected to the gear 212 eccentrically (that is, the connection between the connecting member 230 and the gear 212 deviates from the center of the gear 212), and the other end of the connecting member 230 is hinged to the push rod 221, and the push rod 221 is hinged to the push head 222. Thus, the rotating gear 212 can drive the connecting member 230 to rotate synchronously around the axis of the gear 212, and the rotating connecting member 230 can drive the push rod 221 to perform a deflection motion, and the deflected push rod 221 can drive the push head 222 to perform a linear motion along the axis of the liquid storage chamber 110.

[0055] It should be noted that, as those skilled in the art will appreciate, in some other embodiments, the transmission assembly 210 may also be a transmission structure such as a screw. For the specific details of the screw transmission structure, reference may be made to the relevant technologies known to those skilled in the art, and no further explanation will be given here. It should also be noted that, as those skilled in the art will appreciate, in some other embodiments, the power device 21 may also be a linear motor. In this case, the transmission assembly 210 may only include a coupling 211, one end of the coupling 211 being connected to the push rod 221, and the other end of the coupling 211 being connected to the mover of the linear motor.

[0056] Continuing with reference to FIG. 1 , as shown in FIG. 1 , in some exemplary embodiments, the end of the liquid storage chamber 110 near the transition chamber 130 includes a tapered section 111 . The inner diameter of the tapered section 111 near the transition chamber 130 is smaller than the inner diameter of the tapered section 111 away from the transition chamber 130 (i.e., the inner diameter of the tapered section 111 gradually increases from top to bottom). Thus, by providing the tapered section 111 at the end of the liquid storage chamber 110 near the transition chamber 130, which is narrow at the top and wide at the bottom, the gas flow can be ensured to always point upward, effectively preventing gas from being trapped within the liquid storage chamber 110.

[0057] Please continue to refer to Figures 4 to 8, wherein Figure 4 is a structural schematic diagram of the exhaust mechanism 300 provided in an embodiment of the present invention in a locked state; Figure 5 is a structural schematic diagram of the exhaust mechanism 300 provided in an embodiment of the present invention in a loosened state; Figure 6 is a structural schematic diagram of the exhaust mechanism 300 provided in an embodiment of the present invention when exhausting gas; Figure 7 is a structural schematic diagram of the air valve switch 360 in the exhaust mechanism 300 provided in an embodiment of the present invention when sealing the top end of the air valve 320; Figure 8 is a structural schematic diagram of the exhaust rod 330 in the exhaust mechanism 300 provided in an embodiment of the present invention when re-sealing the bottom end of the air valve 320. As shown in Figures 4 to 8, in some exemplary embodiments, the exhaust mechanism 300 includes a push button 310, an air valve 320, an exhaust rod 330 and a ball valve 340, the top end of the exhaust rod 330 is connected to the push button 310, the bottom end of the exhaust rod 330 is connected to the ball valve 340, the air valve 320 is sleeved on the exhaust rod 330, and the end of the exhaust chamber 120 close to the transition chamber 130 has an air inlet 121 adapted to the ball valve 340; the pump body 100 also has an installation chamber 150 connected to the exhaust chamber 120, the installation chamber 150 is connected to the outside world, the push button 310 and the top end of the exhaust rod 330 are both located in the installation chamber 150, the bottom end of the exhaust rod 330 and the ball valve 340 are both located in the exhaust chamber 120, The air valve 320 is located at the connection between the installation cavity 150 and the exhaust cavity 120, and the bottom end of the exhaust rod 330 can seal the bottom end of the air valve 320 to separate the exhaust cavity 120 from the installation cavity 150; the press key 310 can move back and forth along the axial direction of the installation cavity 150, thereby enabling the exhaust rod 330 to move back and forth along its axial direction relative to the air valve 320; when the exhaust rod 330 moves along its axial direction toward the air inlet 121, its bottom end can move away from the air valve 320 and drive the ball valve 340 to seal the air inlet 121; when the exhaust rod 330 moves along its axial direction toward the air inlet 121, its bottom end can seal the bottom end of the air valve 320 and drive the ball valve 340 away from the air inlet 121. Thus, by configuring the exhaust mechanism 300 to include a push button 310, an air valve 320, an exhaust rod 330, and a ball valve 340, not only can the exhaust mechanism 300 ensure smooth exhaust of gas, but it can also effectively simplify the overall structure of the liquid pump 10 provided by the present invention, thereby facilitating a more compact structure of the liquid pump 10 provided by the present invention. Furthermore, by configuring the exhaust mechanism 300 to include a push button 310, an air valve 320, an exhaust rod 330, and a ball valve 340, operation is further facilitated, making it more convenient for the operator to manually operate the exhaust mechanism 300 to exhaust gas to the outside when exhaust is required.It should be noted that the unidirectional arrows in FIG. 5 , FIG. 6 and FIG. 8 indicate the flow direction of the gas; and the bidirectional arrows in FIG. 7 and FIG. 8 indicate the direction of the rebound force of the elastic member 350 .

[0058] Specifically, as shown in Figure 4, when the push button 310 is in the initial position, the bottom end of the exhaust rod 330 seals the bottom end of the air valve 320, thereby isolating the exhaust chamber 120 from the installation chamber 150 (i.e., the exhaust chamber 120 and the installation chamber 150 are not connected), thereby isolating the exhaust chamber 120 from the outside world, and gas cannot be discharged to the outside world. In addition, when the push button 310 is in the initial position, because the ball valve 340 does not seal the air inlet 121, the exhaust chamber 120 is connected to the transition chamber 130, and gas and liquid can flow into the exhaust chamber 120 normally. As shown in Figure 6, when exhaust is required, the push button 310 can be pressed downward, thereby driving the exhaust rod 330 to move with the ball valve 340 toward the direction close to the air inlet 121 until the ball valve 340 falls into the air inlet 121 to seal the air inlet 121. Since in this process, the bottom end of the exhaust rod 330 will gradually move away from the air valve 320, thereby making the air valve 320 in an open state, the gas entering the exhaust chamber 120 can now pass through the air valve 320 into the installation chamber 150 and be discharged through the installation chamber 150. As shown in FIG8 , when the exhaust rod 330 moves in a direction away from the air inlet 121, the ball valve 340 is driven to disengage from the air inlet 121, thereby opening the air inlet 121. When the bottom end of the exhaust rod 330 contacts the bottom end of the air valve 320, the exhaust rod 330 can seal the air valve 320, thereby isolating the exhaust chamber 120 from the installation chamber 150 (i.e., the exhaust chamber 120 and the installation chamber 150 are not connected), thereby isolating the exhaust chamber 120 from the outside world, and gas cannot be discharged to the outside world. By repeating the above exhaust steps multiple times, all gas can be discharged.

[0059] Please continue to refer to Figures 4 to 9, wherein Figure 9 is a schematic diagram of the connection structure between the exhaust rod 330 and the air valve 320 according to one embodiment of the present invention. As shown in Figures 4 to 9, in some exemplary embodiments, the exhaust rod 330 includes a connected rod body 331 and a sealing head 332. The diameter of the sealing head 332 is larger than the diameter of the rod body 331. The top end of the rod body 331 is connected to the push button 310, and the bottom end of the sealing head 332 is connected to the ball valve 340. Please continue to refer to Figure 10, which is a cross-sectional view of the air valve 320 according to one embodiment of the present invention. As shown in Figure 10, the air valve 320 has a first through hole 321 and a second through hole 322 that are interconnected. The second through hole 322 is located below the first through hole 321. The inner diameter of the second through hole 322 is larger than the inner diameter of the first through hole 321. The second through hole 322 is used for the sealing head 332 to penetrate and is interference-connected with the sealing head 332. The first through hole 321 is used for the rod body 331 to pass through. Thus, by configuring the exhaust rod 330 to include a connected rod body 331 and a sealing head 332, and providing the air valve 320 with a first through hole 321 adapted to the rod body 331 and a second through hole 322 adapted to the sealing head 332, not only can the bottom end of the exhaust rod 330 (i.e., the sealing head 332) be ensured to smoothly seal the air valve 320, but the exhaust rod 330 can also maintain reciprocating motion along its axial direction during movement, which also helps ensure that the exhaust mechanism 300 can smoothly return to its original position. In addition, because the inner diameter of the second through hole 322 is larger than the inner diameter of the first through hole 321, it can be ensured that when the bottom end of the exhaust rod 330 (i.e., the sealing head 332) is located within the second through hole 322, it can smoothly seal the air valve 320.

[0060] It should be noted that, as those skilled in the art can understand, the diameter of the rod body 331 should be slightly smaller than the inner diameter of the first through hole 321, so that when the sealing head 332 is away from the air valve 320 (that is, the sealing head 332 is not in contact with the air valve 320), the air valve 320 is in an open state to connect the exhaust chamber 120 and the installation chamber 150, so that the gas in the exhaust chamber 120 can be discharged smoothly.

[0061] 4 to 8 , as shown in FIG4 to 8 , in some exemplary embodiments, the exhaust mechanism 300 further includes an elastic member 350, the top end of the elastic member 350 being connected to the bottom end of the exhaust rod 330, the bottom end of the elastic member 350 being connected to the ball valve 340, and the elastic member 350 being configured to drive the exhaust rod 330 to cause the ball valve 340 and the push button 310 to return to their respective initial positions when the external force applied to the push button 310 is removed. Thus, by providing the elastic member 350 in the exhaust mechanism 300, when the operator releases the push button 310 (i.e., the external force applied to the push button 310 is removed), the elastic member 350 can smoothly drive the exhaust rod 330 to cause the ball valve 340 and the push button 310 to return to their respective initial positions under the action of the rebound force of the elastic member 350, thereby facilitating operation. It should be noted that, as those skilled in the art will appreciate, the elastic member 350 may be, but is not limited to, a spring, a spring sheet, and the like.

[0062] Please continue to refer to Figures 4 to 8. As shown in Figures 4 to 8, in some exemplary embodiments, the exhaust mechanism 300 further includes a valve switch 360 disposed within the mounting cavity 150. The valve switch 360 is sleeved onto the exhaust rod 330 and is located above the valve 320. Please continue to refer to Figure 11, which is a schematic diagram of the partial structure of the exhaust mechanism according to one embodiment of the present invention, with the push button in the initial position. As shown in Figure 11, the diameter d3 of the valve switch 360 is greater than the inner diameter d2 of the first through hole 321, and when the push button 310 is in the initial position, the distance h1 between the valve switch 360 and the valve 320 is greater than the depth h2 of the second through hole 322. Since the diameter d3 of the air valve switch 360 is larger than the inner diameter d2 of the first through hole 321, the air valve switch 360 can seal the top end of the air valve 320 while following the exhaust rod 330 to move toward the direction close to the air inlet 121 (that is, toward the direction close to the transition chamber 130), thereby driving the air valve 320 to move toward the direction close to the air inlet 121. It can be seen that by setting the air valve switch 360, when the air valve switch 360 contacts the top end of the air valve 320, the air valve switch 360 that moves downward following the exhaust rod 330 can drive the air valve 320 to move downward together, in preparation for subsequent release. Furthermore, because the distance h1 between the gas valve switch 360 and the gas valve 320 is greater than the depth h2 of the second through hole 322 when the push button 310 is in the initial position, the sealing head 332 of the exhaust rod 330 is ensured to be separated from the gas valve 320 before the gas valve switch 360 and the gas valve 320 seal the top end of the gas valve 320, thereby ensuring a displacement difference for exhaust. It should be noted that, as will be understood by those skilled in the art, d1 in FIG11 represents the inner diameter of the second through hole 322.

[0063] Specifically, as shown in Figure 8, after the push button 310 is released, the exhaust rod 330 moves upward under the action of the elastic member 350, thereby driving the air valve switch 360 away from the air valve 320. Since there is a certain distance between the air valve 320 and the sealing head 332 of the exhaust rod 330, the air valve 320 will not close immediately. However, as the sealing head 332 contacts the air valve 320, the air valve 320 closes, thereby isolating the exhaust chamber 120 from the outside world. However, due to the influence of the rebound force of the elastic member 350, the exhaust rod 330 will drive the air valve 320, the ball valve 340, the air valve switch 360 and the push button 310 to move toward their respective original positions, thereby generating negative pressure in the exhaust chamber 120, and then withdrawing the liquid and gas in the balloon.

[0064] Please continue to refer to Figures 1 and 4 to 8. As shown in Figures 1 and 4 to 8, in some exemplary embodiments, the liquid pump 10 also includes a locking member 160 movably connected to the cavity wall of the mounting cavity 150, and the locking member 160 is located below the push button 310 and above the air valve 320. At least a portion of the locking member 160 is located outside the mounting cavity 150. The locking member 160 is configured to abut against the push button 310 when exhaust is not required, so that the exhaust mechanism 300 is in a locked state. Thus, by providing the locking member 160, when venting is not required, the locking member 160 can be moved to the bottom of the push button 310 to resist the push button 310, thereby preventing the negative pressure generated in the liquid storage chamber 110 from working on the venting system due to the accidental triggering of the push button 310 during the filling of the balloon, resulting in incomplete filling of the balloon. At the same time, the locking member 160 can also support the push button 310, ensuring that the push button 310 and the ball valve 340 can be stably in their respective initial positions when no external force is applied. It should be noted that, as shown in Figure 5, when venting is required, the locking member 160 can be first moved outward to separate the locking member 160 from the push button 310, and then the push button 310 can be pressed. After the exhaust is completed and before the balloon is circulated and filled, the locking member 160 is moved to the bottom of the push button 310 to press against the push button 310, thereby putting the exhaust mechanism 300 in a locked state.

[0065] Continuing to refer to Figures 4 to 8 , as shown in Figures 4 to 8 , in some exemplary embodiments, a limiting member 151 is further provided in the installation cavity 150, and the limiting member 151 is disposed between the push button 310 and the air valve 320. Thus, by providing the limiting member 151 in the installation cavity 150, the air valve 320 can be limited in position, effectively ensuring that the air valve 320 can return to its initial position under the action of the rebound force of the elastic member 350.

[0066] It should be noted that, as those skilled in the art will appreciate, the position limiting member 151 should be positioned away from the gas valve switch 360 and the exhaust rod 330 to ensure smooth vertical movement of the gas valve switch 360 and the exhaust rod 330. It should also be noted that, as those skilled in the art will appreciate, the present invention does not limit the specific structure of the position limiting member 151. The position limiting member 151 may be, but is not limited to, a disc-shaped structure, as long as the position limiting member 151 can limit the gas valve 320 and does not block the vertical movement of the gas valve switch 360 and the exhaust rod 330.

[0067] In some exemplary embodiments, the liquid pump 10 further includes a housing (not shown) for enclosing the filling and withdrawing mechanism 200. The housing is provided with a snap-fit ​​structure for engaging with the outer shell of the main unit 20, described below, to provide a more secure connection between the liquid pump 10 and the main unit 20. It should be noted that, as will be understood by those skilled in the art, the portion of the transmission assembly 210 that is connected to the power unit 21 in the main unit 20 needs to extend outside the housing.

[0068] Please continue to refer to Figures 12 and 13, wherein Figure 12 is a schematic structural diagram of the exhaust mechanism provided in another embodiment of the present invention when the push button is in the initial position; and Figure 13 is a schematic structural diagram of the exhaust mechanism provided in another embodiment of the present invention when exhausting gas. As shown in Figures 12 and 13, the main difference between the exhaust mechanism 300 provided in this embodiment and the exhaust mechanism 300 shown in Figures 5 to 8 is that the exhaust mechanism 300 provided in this embodiment does not have a ball valve 340, and in this embodiment, the top end of the elastic member 350 is connected to the bottom end of the push button 310, and the bottom end of the elastic member 350 is connected to the limit member 151. It can be seen that the exhaust mechanism 300 provided in this embodiment is simpler in structure than the exhaust structure 300 provided in the previous embodiment.

[0069] It should be noted that, as those skilled in the art will appreciate, in this embodiment, the elastic member 350 can support the push button 310, so that when there is no external force, the push button 310 can remain in its initial position. Therefore, in this embodiment, there is no need to provide a locking member 160. Of course, in order to prevent accidental touching, the locking member 160 can also be movably connected to the cavity wall of the mounting cavity 150 of the exhaust mechanism 300 provided in this embodiment, as shown in Figures 5 to 8. It should also be noted that, as those skilled in the art will appreciate, more details about the exhaust mechanism 300 provided in this embodiment can be adaptively understood by referring to the relevant details of the exhaust mechanism 300 provided in the previous embodiment, and will not be repeated here.

[0070] The specific working principle of the exhaust mechanism 300 provided in this embodiment is: under normal conditions (i.e., when exhaust is not required), the push button 310 is in the initial position. Since the exhaust chamber 120 is connected to the transition chamber 130, gas and liquid can flow into the exhaust chamber 120 normally at this time, and since the air valve 320 is in a closed state at this time, the exhaust chamber 120 is separated from the outside world, and the gas cannot be discharged to the outside world at this time. When exhaust is required, the push button 310 can be pressed downward (if there is a locking member 160, the locking member 160 can be first moved outward to separate the locking member 160 from the push button 310, and then the push button 310 can be pressed downward), thereby driving the bottom end of the exhaust rod 330 to move toward the transition chamber 130 and gradually away from the air valve 320. When the exhaust rod 330 is completely separated from the air valve 320, the gas entering the exhaust chamber 120 can pass through the air valve 320 into the installation chamber 150 and be discharged through the installation chamber 150, thereby achieving exhaust. After pressing the push button 310 for a certain distance, the air valve switch 360 can drive the air valve 320 to move downward together, in preparation for subsequent release. After the push button 310 is released, the elastic member 350 drives the push button 310 to move upward, thereby driving the exhaust rod 330 and the air valve switch 360 to move upward together. Since there is a certain distance between the air valve 320 and the sealing head 332 of the exhaust rod 330, the air valve 320 will not close immediately. However, as the sealing head 332 contacts the air valve 320, the air valve 320 closes, thereby isolating the exhaust chamber 120 from the outside world. Due to the influence of the elastic member 350's rebound force, the exhaust rod 330, the air valve 320, the air valve switch 360 and the push button 310 move toward their respective original positions, thereby generating negative pressure in the exhaust chamber 120, thereby withdrawing the liquid and gas in the balloon. By repeating the above-mentioned exhaust steps multiple times, all the gas can be exhausted (if there is a locking member 160, after all the gas is exhausted and before the balloon is circulated and filled, the locking member 160 is moved to the bottom of the push button 310 to press against the push button 310, so that the exhaust mechanism 300 is in a locked state).

[0071] Please continue to refer to Figure 14, which is a schematic diagram of the overall structure of the liquid pump 10 provided in another embodiment of the present invention. As shown in Figure 14, the main difference between the liquid pump 10 provided in this embodiment and the liquid pump 10 shown in Figure 1 is that the liquid pump 10 shown in Figure 1 is a horizontal structure, and the axial direction of the liquid storage chamber 110 is perpendicular to the axial direction of the exhaust chamber 120, while the liquid pump 10 shown in Figure 14 is a vertical structure, and the axial direction of the liquid storage chamber 110 is parallel to the axial direction of the exhaust chamber 120. It should be noted that, as those skilled in the art will understand, the specific structure of the liquid pump 10 provided in this embodiment can be adaptively understood with reference to the specific structure of the liquid pump 10 provided in the previous embodiment, and will not be repeated here. It should be noted that, as those skilled in the art will understand, the liquid pump 10 provided in this embodiment can also adopt the exhaust mechanism 300 shown in Figures 12 and 13.

[0072] To achieve the above-mentioned concept, the present invention further provides a liquid filling system. Please refer to Figure 15, which is a schematic block diagram of the liquid filling system provided in one embodiment of the present invention. As shown in Figure 15, the liquid filling system provided by the present invention includes a host 20 and a liquid pump 10 as described in any of the above items, and the host 20 is detachably connected to the liquid pump 10. Since the liquid filling system provided by the present invention includes the liquid pump 10 provided by the present invention, the liquid filling system provided by the present invention has at least all the beneficial effects of the liquid pump 10 provided by the present invention. For details, please refer to the relevant description of the beneficial effects of the liquid pump 10 provided by the present invention above, and no further details will be given here. In addition, since the liquid in the liquid pump 10 is connected to the balloon, when the extreme situation of the balloon ruptures in the human blood vessel occurs, the liquid pump 10 and the liquid therein will be in direct contact with the human blood. Therefore, the liquid pump 10 needs to be disinfected and sterilized each time it is used clinically. The filling system provided by the present invention is configured to have a separate structure with a detachable connection between the host 20 and the liquid pump 10, so that the liquid pump 10 can be sterilized by the manufacturer and provided in a sterile form. In clinical use, the user can directly use a new sterile liquid pump 10 each time. The liquid in the liquid pump 10 uses sterile saline or other sterile liquids in the operating room, thereby avoiding the hospital users from repeatedly disinfecting and sterilizing the filling system and medical microcirculation equipment, thereby solving the problem that the liquid pump 10 and the host 20 need to be disinfected and sterilized each time they are used clinically when they are integrated into one. In addition, by setting the host 20 and the liquid pump 10 as a detachable and separate structure, the maintenance of the liquid pump 10 is also simple and convenient. When the liquid pump 10 is damaged, a new liquid pump 10 can be quickly installed on the host 20.

[0073] The specific working principle of the liquid filling system provided by the present invention is: under normal conditions (i.e., when exhaust is not required), the push button 310 is in the initial position. Since the exhaust chamber 120 is connected to the transition chamber 130, gas and liquid can flow into the exhaust chamber 120 normally at this time, and since the air valve 320 is in a closed state at this time, the exhaust chamber 120 is separated from the outside world, and the gas cannot be discharged to the outside world at this time. When exhaust is required, the push button 310 can be pressed downward (if there is a locking member 160, the locking member 160 can be first moved outward to separate the locking member 160 from the push button 310, and then the push button 310 can be pressed downward), thereby driving the bottom end of the exhaust rod 330 to move toward the transition chamber 130 and gradually away from the air valve 320. When the exhaust rod 330 is completely separated from the air valve 320, the gas entering the exhaust chamber 120 can pass through the air valve 320 into the installation chamber 150 and be discharged through the installation chamber 150, thereby achieving exhaust. After pressing the push button 310 for a certain distance, the air valve switch 360 can drive the air valve 320 to move downward together, in preparation for subsequent release. After the push button 310 is released, under the action of the rebound force of the elastic member 350, the push button 310 and the exhaust rod 330 can move upward, thereby driving the air valve switch 360 away from the air valve 320. Since there is a certain distance between the air valve 320 and the sealing head 332 of the exhaust rod 330, the air valve 320 will not close immediately. However, as the sealing head 332 contacts the air valve 320, the air valve 320 closes, thereby isolating the exhaust chamber 120 from the outside world. Due to the influence of the rebound force of the elastic member 350, the exhaust rod 330, the air valve 320, the air valve switch 360 and the push button 310 move toward their respective original positions, thereby generating negative pressure in the exhaust chamber 120, thereby withdrawing the liquid and gas in the balloon. By repeating the above-mentioned exhaust steps several times, all the gas can be exhausted (if there is a locking member 160, after all the gas is exhausted and before the balloon is circulated and filled, the locking member 160 is moved to the bottom of the push button 310 to press against the push button 310, so that the exhaust mechanism 300 is in a locked state). Then, by driving the piston 220 in the filling and withdrawing mechanism 200 to move along the axial direction of the liquid storage chamber 110 toward the position of the balloon, the filling liquid in the liquid storage chamber 110 can be transported into the balloon to fill the balloon. When the balloon needs to be withdrawn, the piston 220 in the filling and withdrawing mechanism 200 can be driven to move along the axial direction of the liquid storage chamber 110 toward the direction away from the position of the balloon, so that the liquid in the balloon can be withdrawn into the liquid storage chamber 110.It should be noted that, as those skilled in the art can understand, before exhausting, the pump body 100 needs to be connected to the liquid reservoir storing the filling liquid through the interface 140 thereon, and the filling liquid in the liquid reservoir needs to be pumped back into the liquid storage chamber 110 through the filling and pumping mechanism 200.

[0074] It should be noted that, as those skilled in the art can understand, the host 20 includes but is not limited to a controller, a display screen and a power device 21 (such as a motor). For more information about the structure of the host 20, reference can be made to relevant technologies known to those skilled in the art, and no further details will be given here.

[0075] To achieve the above-mentioned principles, the present invention further provides a medical microcirculation device. Please refer to Figure 16, which is a schematic block diagram of a medical microcirculation device provided in one embodiment of the present invention. As shown in Figure 16, the medical microcirculation device provided by the present invention includes a balloon catheter 30 and the liquid filling system provided above. Because the medical microcirculation device provided by the present invention includes the liquid filling system provided by the present invention, the medical microcirculation device provided by the present invention has at least all the beneficial effects of the liquid filling system provided by the present invention. For details, please refer to the relevant description of the beneficial effects of the liquid filling system provided by the present invention above, and will not be repeated here.

[0076] It should be noted that the present invention does not limit the specific structure of the balloon catheter 30. For the specific structure of the balloon catheter 30, reference can be made to the relevant technologies known to those skilled in the art, and no further details will be given here. It should also be noted that, as those skilled in the art will understand, the medical circulation device provided by the present invention may include other structures in addition to the balloon catheter 30 and the liquid filling system provided above. For more structures of the medical microcirculation device, reference can be made to the relevant technologies known to those skilled in the art, and no further details will be given here. In addition, it should be noted that, as those skilled in the art will understand, the medical microcirculation device provided by the present invention can be used not only in the coronary sinus microcirculation system to treat obstructive coronary artery disease, but can also be used to treat other obstructive artery diseases.

[0077] In summary, compared with the prior art, the liquid pump 10, liquid filling system, and medical microcirculation device provided by the present invention have the following beneficial effects:

[0078] The present invention can fill the balloon by filling it with liquid by providing the liquid storage chamber 110 and the filling and withdrawal mechanism 200, thereby reducing the risk of gas embolism caused by gas leakage during the use of the product. In addition, the present invention can solve the problem of complex exhaust operation by providing the transition chamber 130, the exhaust chamber 120 and the exhaust mechanism 300, so that the exhaust requirements can be met during the filling process. In addition, the present invention provides the main unit 20 and the liquid pump 10 with a detachable and separate structure, so that the liquid pump 10 can be sterilized by the manufacturer and provided in a sterile form. In clinical use, the user can directly use a new sterile liquid pump 10 each time. The liquid in the liquid pump 10 uses sterile saline or other sterile liquids in the operating room, thereby avoiding the hospital users from repeatedly disinfecting and sterilizing the filling system and medical microcirculation equipment. In addition, it can solve the problem that the liquid pump 10 and the main unit 20 need to be disinfected and sterilized each time they are used in clinical practice when the liquid pump 10 and the main unit 20 are integrated. In addition, by setting the host 20 and the liquid pump 10 as a detachable and separate structure, the maintenance of the liquid pump 10 is also simple and convenient. When the liquid pump 10 is damaged, a new liquid pump 10 can be quickly installed on the host 20.

[0079] It should be noted that the above description is merely a description of preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes or modifications made by persons skilled in the art based on the above disclosure are within the scope of protection of the present invention. Obviously, those skilled in the art may make various changes and modifications to the invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the present invention and its equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A liquid pump for medical microcirculation equipment, characterized in that: The liquid pump comprises a pump body, a filling and pumping mechanism and an exhaust mechanism; The pump body has a liquid storage cavity, an exhaust cavity and a transition cavity for connecting the liquid storage cavity and the exhaust cavity, wherein the transition cavity is located above the liquid storage cavity and communicates with the liquid storage cavity; The pump body is also provided with an interface for connecting a balloon catheter, and the interface is communicated with the transition cavity; At least a portion of the filling and withdrawing mechanism is located in the liquid storage cavity and is capable of reciprocating along the axial direction of the liquid storage cavity to fill and / or withdraw the balloon; At least a portion of the exhaust mechanism is located in the exhaust cavity and is capable of reciprocating along the axial direction of the exhaust cavity to connect or isolate the exhaust cavity from the outside.

2. The liquid pump according to claim 1, characterized in that The filling and withdrawing mechanism includes a connected transmission assembly and a piston, the piston includes a connected push rod and a push head, the push head is located in the liquid storage chamber, at least a portion of the push rod is located outside the liquid storage chamber and is transmission-connected to the transmission assembly, and the transmission assembly is used to be connected to a power device to drive the push rod and the push head to reciprocate axially along the liquid storage chamber under the drive of the power device.

3. The liquid pump according to claim 2, characterized in that The transmission assembly includes a coupling and a gear that are coaxially connected. The push rod is in transmission connection with the gear, and the coupling is used to be connected to the power device.

4. The liquid pump according to claim 3, characterized in that One side of the push rod is provided with a plurality of tooth-like structures for meshing with the gear.

5. The liquid pump according to claim 3, characterized in that The push rod is eccentrically connected to the gear through a connecting piece.

6. The liquid pump according to claim 5, characterized in that One end of the connecting member is eccentrically fixedly connected to the gear, the other end of the connecting member is hinged to the push rod, and the push rod is hinged to the push head.

7. The liquid pump according to claim 1, characterized in that The end of the liquid storage cavity close to the transition cavity has a tapered section, and the inner diameter of the tapered section close to the transition cavity is smaller than the inner diameter of the tapered section away from the transition cavity.

8. The liquid pump according to claim 1, characterized in that The exhaust mechanism includes a press key, an air valve and an exhaust rod, the top end of the exhaust rod is connected to the press key, and the air valve is movably mounted on the exhaust rod; the pump body also has an installation cavity connected to the exhaust chamber, and the installation cavity is connected to the outside world, the press key and the top end of the exhaust rod are both located in the installation cavity, the press key can move back and forth along the axial direction of the installation cavity, the bottom end of the exhaust rod is located in the exhaust chamber, and the air valve is located at the connection between the installation cavity and the exhaust chamber; when the press key is in the initial position, the bottom end of the exhaust rod can seal the bottom end of the air valve to separate the exhaust chamber from the installation cavity; when the press key is pressed, the exhaust rod can move relative to the air valve toward the direction close to the transition chamber to connect the exhaust chamber with the installation cavity.

9. The liquid pump according to claim 8, characterized in that The liquid pump also includes a locking member movably connected to the cavity wall of the installation cavity, the locking member is located below the push button and above the air valve, at least a portion of the locking member is located outside the installation cavity, and the locking member is configured to abut against the push button when exhaust is not required, so that the exhaust mechanism is in a locked state.

10. The liquid pump according to claim 8, characterized in that The exhaust rod includes a connected rod body and a sealing head, the diameter of the sealing head is larger than the diameter of the rod body, the top end of the rod body is connected to the push key, the air valve has a first through hole and a second through hole that are interconnected, the second through hole is located below the first through hole, the inner diameter of the second through hole is larger than the inner diameter of the first through hole, the second through hole is used for the sealing head to penetrate, and is interference connected with the sealing head, and the first through hole is used for the rod body to pass through.

11. The liquid pump according to claim 10, characterized in that The exhaust mechanism also includes an air valve switch provided in the mounting cavity, the air valve switch being sleeved on the exhaust rod, the air valve switch being located above the air valve, the diameter of the air valve switch being larger than the inner diameter of the first through hole, and when the push button is in the initial position, the distance between the air valve switch and the air valve is greater than the depth of the second through hole.

12. The liquid pump according to claim 8, characterized in that The exhaust mechanism also includes an elastic member connected to the push key or the exhaust rod, and the elastic member is configured to drive the exhaust rod and the push key to return to their respective corresponding initial positions when the external force applied to the push key is eliminated.

13. The liquid pump according to claim 8, characterized in that The exhaust mechanism further comprises a ball valve connected to the bottom end of the exhaust rod, and one end of the exhaust cavity close to the transition cavity is provided with an air inlet adapted to the ball valve.

14. The liquid pump according to claim 8, characterized in that A limiting member is further provided in the installation cavity, and the limiting member is provided between the pressing key and the air valve.

15. A liquid filling system, characterized in that: The device comprises a main unit and the liquid pump according to any one of claims 1 to 14, wherein the main unit is detachably connected to the liquid pump.

16. A medical microcirculation device, characterized in that: The invention comprises a balloon catheter and the fluid-filled system according to claim 15 .

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