Blood pump system

Abstract

The embodiment of the utility model provides a blood pump system which comprises a sensor assembly, the sensor assembly comprises a switching valve, a first connecting pipe, a second connecting pipe and a sensor, the switching valve is provided with a flow channel, an inlet and a first outlet, and the first connecting pipe is communicated with the inlet and used for introducing fluid; the first end of the second connecting pipe is communicated with the first outlet, and the second end is communicated with the aorta; the sensor is used for detecting the pressure of the runner; the inner diameter of the flow channel is not larger than the inner diameter of the first connecting pipe and not smaller than the inner diameter of the second connecting pipe. According to the blood pump system, the sensor is arranged outside the body, the probability that the sensor is damaged due to the fact that blood directly impacts the sensor is reduced, the size of the blood pump system placed in the human body part is reduced, and the size arrangement of the inner diameters of the flow channel, the first connecting pipe and the second connecting pipe is reduced; the probability that the blood pressure detection accuracy of the sensor is affected by bubbles generated in the fluid flowing process can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a blood pump system. Background Art

[0002] The blood pump system is a commonly used medical device. It includes a pump body and a pressure sensor. The pump body provides power for the blood to flow. When the patient's heart has problems and cannot provide power, the pump body can be placed in the patient's heart to provide power for the patient's blood, thereby alleviating the heart load. The pressure sensor can detect the blood pressure to obtain the real-time change waveform of the blood pressure.

[0003] In the related art, the pressure sensor is arranged on the outer surface of the pump body and inserted into the patient's body together with the pump body. On the one hand, the circumferential size of the pump body is increased, so that the pump body imposes a greater burden on the patient during the insertion or removal process; on the other hand, the blood directly impacts the pressure sensor, and the pressure sensor is easily damaged, or falls off from the pump body, dissolving in the blood and leaking substances such as silicone to cause damage to the patient, and there is also the problem of causing blockage. Utility Model Content

[0004] In view of this, an embodiment of the present application hopes to provide a blood pump system in which a sensor is disposed outside the body, which can reduce the diameter of the pump body and reduce the probability of sensor damage.

[0005] The present application embodiment provides a blood pump system, including a sensor assembly, wherein the sensor assembly includes:

[0006] A switching valve having a flow channel, an inlet and a first outlet, wherein the switching valve has a first state, and in the first state, the flow channel connects the inlet and the first outlet;

[0007] A first connecting pipe, connected to the inlet, for introducing fluid;

[0008] a second connecting tube, wherein a first end of the second connecting tube is connected to the first outlet, and a second end of the second connecting tube is used to be connected to the aorta;

[0009] A sensor, disposed on the switching valve, for detecting the pressure of the flow channel;

[0010] Wherein, the inner diameter of the flow channel is not larger than the inner diameter of the first connecting pipe, and is not smaller than the inner diameter of the second connecting pipe.

[0011] In some embodiments, the inner diameter of the flow channel is equal to the inner diameter of the first connecting pipe; and / or the inner diameter of the flow channel is equal to the inner diameter of the second connecting pipe.

[0012] In some implementation schemes, the sensor is disposed at one end of the switching valve close to the inlet and penetrates into the flow channel.

[0013] In some embodiments, the switching valve also has a second outlet, the sensor assembly includes a third connecting tube, one end of the third connecting tube is connected to the second outlet, and the other end is used to connect to atmospheric pressure, and the switching valve includes a second state. In the first state, the second outlet is closed; in the second state, the flow channel connects the inlet and the second outlet, and the first outlet is closed.

[0014] In some embodiments, the switching valve includes a valve seat, a valve core and a handle, wherein at least a portion of the valve core is accommodated in the valve seat, and the handle is disposed outside the valve seat and connected to the valve core for driving the valve core to move so that the switching valve can switch between the first state and the second state.

[0015] In some embodiments, the inlet and the first outlet are arranged on opposite sides of the valve core, the valve seat has an interface at one end close to the inlet, the interface is connected to the flow channel, and the sensor is arranged at the interface to collect the pressure of the liquid at the interface.

[0016] In some embodiments, the valve seat is an integral structure; and / or the handle and the valve core are an integral structure.

[0017] In some embodiments, the blood pump system also includes a pump body and a catheter, the pump body having a blood inlet for communicating with the ventricle and a blood outlet for communicating with the aorta, the pump body is used to pump blood from the blood inlet to the blood outlet, the catheter connects the pump body and the sensor assembly, the pump body also has a collection port for communicating with the aorta, the second connecting tube is passed through the interior of the catheter and the pump body, and the second end of the second connecting tube is connected to the collection port.

[0018] In some embodiments, the blood pump system includes a handle, a circuit board, and a wiring harness connector. The end of the catheter away from the pump body is connected to the handle. The handle has a storage space. The switching valve, the wiring harness connector and the sensor are all arranged in the storage space. The sensor and the wiring harness connector are electrically connected to the circuit board, respectively. The wiring harness connector is used to connect to an external cable. The wiring harness connector and the catheter are connected to opposite ends of the handle in the length direction.

[0019] In some embodiments, the pump body has a contraction shell segment, and the pump body is connected to the conduit through the contraction shell segment. The cross-sectional area of ​​the contraction shell segment gradually decreases in the direction approaching the conduit, and the collection port passes through the side wall of the contraction shell segment. The second end of the second connecting pipe extends into the contraction shell segment and is connected to the edge of the collection port.

[0020] In some embodiments, the pump body includes a first straight section and a second straight section, the contraction shell section is connected to one end of the first straight section, the second straight section extends obliquely from the other end of the first straight section toward a first side of the first straight section, and the collection port is arranged on a side of the contraction shell section facing the first side.

[0021] In the blood pump system provided by the embodiment of the present application, the sensor is arranged outside the body, which reduces the probability of blood directly impacting the sensor and causing damage to the sensor, and reduces the size of the part where the blood pump system is placed in the human body. Under the action of the fluid introduced by the second connecting tube, the probability of the blood pump system generating thrombus at the junction of the second connecting tube and the blood can also be reduced. At the same time, the size arrangement of the inner diameters of the flow channel, the first connecting tube, and the second connecting tube can reduce the probability of bubbles being generated during the flow of the fluid and being carried into the aorta to affect the accuracy of surgery and sensor blood pressure detection, and facilitates the sensor to accurately detect the blood pressure pumped to the aorta. In addition, the sensor is arranged outside the human body, and a sensor with relatively low cost and requirements can be selected as needed to reduce the structural cost of the blood pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a blood pump system provided in one embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the cooperation between the shrink shell section and the second connecting pipe;

[0024] Figure 3 for Figure 1 A schematic diagram of the coordination between the switching valve, the first connecting pipe, the second connecting pipe and the sensor is shown;

[0025] Figure 4 for Figure 3 Schematic cross-section of the structure shown.

[0026] Description of Reference Numerals

[0027] 1- Blood pump system;

[0028] 10-pump body; 10a-collection port; 101-contracted shell section; 102-first straight section; 103-second straight section; 11-conduit; 12-switching valve; 12a-flow channel; 12b-inlet; 12c-first outlet; 12d-second outlet; 12e-interface; 121-valve seat; 122-valve core; 123-handle; 13-sensor; 14-first connecting pipe; 15-second connecting pipe; 16-third connecting pipe; 17-flushing valve; 18-handle; 18a-accommodating space; 19-circuit board; 20-wiring harness connector. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of the specific technical features in the present invention will not be described separately.

[0031] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0032] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0033] The present application embodiment provides a blood pump system 1, see Figure 1 , the blood pump system 1 includes a sensor assembly.

[0034] It can be understood that the sensor assembly is used to obtain the aortic fluid flow pressure, and reflect the blood pressure in the ventricle through the aortic fluid flow pressure, so as to obtain the systolic pressure, diastolic pressure and mean arterial pressure of the ventricle.

[0035] The sensor assembly includes a switching valve 12 , a first connecting pipe 14 , a second connecting pipe 15 and a sensor 13 .

[0036] The switching valve 12 has a flow channel 12a, an inlet 12b and a first outlet 12c. The switching valve 12 has a first state. In the first state, the flow channel 12a connects the inlet 12b and the first outlet 12c. The first connecting pipe 14 is connected to the inlet 12b for passing fluid. The first end of the second connecting pipe 15 is connected to the first outlet 12c, and the second end is used to communicate with the aorta. The sensor 13 is arranged on the switching valve 12 for detecting the pressure of the flow channel 12a.

[0037] It should be noted that the fluid may be physiological saline, or a mixed liquid of glucose and heparin, or other liquids suitable for introduction into the human body, which is not limited here.

[0038] Exemplarily, the blood pump system 1 may further include a flushing valve 17 , and one end of the first connecting tube 14 away from the inlet 12 b may be connected to the flushing valve 17 , which supplies fluid to the first connecting tube 14 so that the fluid flows into the inlet 12 b through the first connecting tube 14 .

[0039] It should be noted that the fluid injection method can be continuous low-speed injection or rapid injection, and there is no limitation here.

[0040] It can be understood that the first end of the second connecting tube 15 is connected to the first outlet 12c, and the second end is connected to the aorta. The liquid introduced into the flow channel 12a can be connected to the blood of the aorta through the second connecting tube 15, thereby realizing pressure transmission. When the blood pump system 1 is working, the first end of the second connecting tube 15 is arranged outside the body to communicate with the fluid introduced from the flow channel 12a, and the second end of the second connecting tube 15 extends into the human body to communicate with the aorta. In other words, the sensor assembly can connect the blood with the fluid through the second connecting tube 15, and the sensor 13 can be arranged outside the body to detect the pressure of the fluid, thereby obtaining the blood pressure of the aorta, and the sensor 13 does not need to be placed in the human body.

[0041] Specifically, in the first state, the flow channel 12a is connected to the inlet 12b and the first outlet 12c, and the fluid enters the inlet 12b and the flow channel 12a through the first connecting tube 14, and flows from the first outlet 12c to the second connecting tube 15, and then communicates with the blood in the aorta. That is to say, in the first state, the fluid in the flow channel 12a is connected with the blood in the aorta, and the blood pressure of the aorta can be transmitted to the fluid, so that the fluid pressure in the flow channel 12a can synchronously reflect the blood pressure in the aorta, and the sensor 13 detects the pressure of the flow channel 12a to reflect the blood pressure in the aorta, so as to know the blood pressure in the ventricle. Of course, the fluid in the flow channel 12a is connected with the blood in the aorta, which can also reduce the probability of arterial blood coagulation and thrombosis at the connection point between the second connecting tube 15 and the aorta.

[0042] It is understandable that in the related art, the sensor is set on the outer surface of the pump body and inserted into the heart together with the pump body. On the one hand, the circumferential size of the pump body is increased, so that the pump body places a greater burden on the patient during insertion or removal; on the other hand, the blood directly impacts the sensor, which is easily damaged or falls off the pump body, dissolving in the blood and leaking substances such as silicone to cause damage to the patient, and there is also the problem of causing blockage. In addition, the sensors inserted into the human body generally use optical fiber sensors, which are expensive to use.

[0043] In the present embodiment, the sensor 13 is arranged on the switching valve 12 and is connected to the aorta through the second connecting tube 15. The sensor 13 detects the pressure of the flow channel 12a to obtain the change of the aortic blood pressure, which can reduce the risk of the sensor 13 being damaged or falling off due to pressure. The size of the part where the blood pump system 1 is inserted into the human body can be smaller and the structure can be simpler, which is convenient for increasing the insertion reliability of the blood pump system 1. In addition, the sensor 13 is arranged outside the body, which can also reduce the dead angle where thrombus is easily formed, and there is no need to use the optical fiber sensor 13, thereby reducing the use cost.

[0044] See also Figure 4 , the inner diameter R of the flow channel 12a is not greater than the inner diameter R1 of the first connecting pipe 14, and is not less than the inner diameter R2 of the second connecting pipe 15, that is, R≤R1, and R≥R2.

[0045] That is to say, in the process of the fluid flowing from the first connecting pipe 14 into the flow channel 12a and then into the second connecting pipe 15, the flow area of ​​the fluid at the first connecting pipe 14 is greater than or equal to the flow area at the flow channel 12a; the flow area of ​​the fluid at the flow channel 12a is greater than or equal to the flow area at the second connecting pipe 15.

[0046] In the related art, the sensor is installed on the switching valve through a mounting seat, the mounting seat is inserted into the inlet of the switching valve, the first connecting pipe is passed through the mounting seat, and the sensor is connected to the mounting seat, so as to complete the docking of the switching valve, the sensor and the first connecting pipe. However, in this way, in order to facilitate production and assembly, the inner diameter of the flow channel is larger than the inner diameter of the channel in the sensor and the inner diameter of the first connecting pipe. When the fluid flows to the flow channel through the first connecting pipe, the flow area increases, and the static pressure of the fluid increases, so that bubbles escape from the fluid. If the bubbles enter the aorta through the second connecting pipe under the drive of the fluid, it will have an adverse effect on the human body. If the bubbles are retained in the switching valve, it will affect the measurement accuracy of the sensor.

[0047] In this embodiment, the sensor 13 is directly arranged on the switching valve 12, the structure is simpler, and the inner diameter of the flow channel 12a is not larger than the inner diameter of the first connecting tube 14, and not smaller than the inner diameter of the second connecting tube 15. When the fluid flows from the first connecting tube 14 and the flow channel 12a to the second connecting tube 15, the static pressure of the fluid remains unchanged or decreases, thereby reducing the probability of bubble generation, thereby reducing the probability of bubbles entering the aorta, and increasing the accuracy of pressure detection by the sensor 13.

[0048] In the blood pump system 1 provided in the embodiment of the present application, the sensor 13 is arranged outside the body, which reduces the probability of blood directly impacting the sensor 13 and causing damage to the sensor 13, and reduces the size of the part of the blood pump system 1 for insertion into the human body. Under the action of the fluid introduced by the second connecting tube 15, the probability of the blood pump system 1 generating thrombus at the junction of the second connecting tube 15 and the blood can also be reduced. At the same time, the size arrangement of the inner diameters of the flow channel 12a, the first connecting tube 14, and the second connecting tube 15 can reduce the probability of bubbles being generated during the fluid flow and being carried into the aorta to affect the operation and the accuracy of the blood pressure detection of the sensor 13, and facilitates the accurate detection of the blood pressure pumped to the aorta by the sensor 13. In addition, the sensor 13 is arranged outside the human body, and a sensor 13 with relatively low cost and requirements can be selected as needed to reduce the structural cost of the blood pump system 1.

[0049] It is understandable that the material of the first connecting tube 14 and the second connecting tube 15 is not limited. For example, the first connecting tube 14 and the second connecting tube 15 can be made of hard conduits. The first connecting tube 14 and the second connecting tube 15 can be made of hard conduits of the same specifications or hard conduits of different specifications, which is not limited here.

[0050] Exemplarily, the inner diameter of the second connecting tube 15 is 0.4 mm (millimeter) to 1 mm, for example, 0.4 mm, 0.45 mm, 0.5 mm, 0.6 mm, 0.62 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0051] It is understandable that, in some embodiments, the inner diameter of the flow channel 12 a is smaller than the inner diameter of the first connecting tube 14 , and larger than the inner diameter of the second connecting tube 15 .

[0052] In some other embodiments, the inner diameter of the flow channel 12 a is equal to the inner diameter of the first connecting pipe 14 ; and / or the inner diameter of the flow channel 12 a is equal to the inner diameter of the second connecting pipe 15 .

[0053] That is to say, after the fluid enters the flow channel 12a through the first connecting tube 14, the flow area and static pressure of the fluid remain unchanged; and / or, after the fluid enters the second connecting tube 15 through the flow channel 12a, the flow area and static pressure of the fluid remain unchanged. This makes it easier to increase the flow stability of the fluid, reduce the probability of bubble generation, and increase the pressure detection accuracy of the sensor 13.

[0054] The sensor 13 may be disposed at any position, and may be disposed at an end of the switching valve 12 close to the inlet 12 b or at an end of the switching valve 12 close to the first outlet 12 c.

[0055] For example, in some embodiments, the sensor 13 is disposed at one end of the switching valve 12 close to the inlet 12 b and penetrates the flow channel 12 a.

[0056] It can be understood that the sensor 13 is disposed in the flow channel 12a, which means that the sensor 13 can be in contact with the fluid so as to accurately sense the change in fluid pressure and thus obtain the change in blood pressure.

[0057] The sensor 13 is arranged at one end of the switching valve 12 close to the inlet 12b. The end close to the inlet 12b makes it easier for the operator to install the sensor 13 and to connect the sensor 13 to external equipment, shortening the wiring length. It can also reduce the probability of interference with the second connecting tube 15, facilitate the installation of the second connecting tube 15, and increase the installation reliability of the blood pump system 1.

[0058] It is understandable that the external device can display the pressure signal sensed by the sensor 13 so as to obtain the real-time changing waveform of the blood pressure.

[0059] For some examples, see Figure 3 The switching valve 12 also has a second outlet 12d, the sensor assembly includes a third connecting pipe 16, one end of the third connecting pipe 16 is connected to the second outlet 12d, and the other end is used to connect to the atmospheric pressure. The switching valve 12 includes a second state. In the first state, the second outlet 12d is closed; in the second state, the flow channel 12a connects the inlet 12b and the second outlet 12d, and the first outlet 12c is closed.

[0060] Specifically, in the first state, the flow channel 12a connects the inlet 12b and the first outlet 12c, and the fluid flows through the inlet 12b, the flow channel 12a, and the first outlet 12c to the second connecting tube 15. At this time, the second outlet 12d is closed, and there is no fluid flowing in the third connecting tube 16. The sensor 13 can detect the fluid pressure in the flow channel 12a to obtain the blood pressure. In the second state, the flow channel 12a connects the inlet 12b and the second outlet 12d, and the fluid flows through the inlet 12b, the flow channel 12a, and the second outlet 12d to the third connecting tube 16 and then communicates with the atmosphere. In the second state, the sensor 13 can be zeroed and calibrated so that when the switching valve 12 is switched to the first state, the pressure in the flow channel 12a can be accurately measured to increase the measurement accuracy.

[0061] The specific structure of the switching valve 12 is not limited.

[0062] For some examples, see Figure 3 and Figure 4 The switching valve 12 includes a valve seat 121, a valve core 122 and a handle 123. At least a portion of the valve core 122 is accommodated in the valve seat 121. The handle 123 is arranged outside the valve seat 121 and connected to the valve core 122 for driving the valve core 122 to move so that the switching valve 12 switches between the first state and the second state.

[0063] Specifically, the valve core 122 can be driven to move relative to the valve seat 121 by applying a force to the handle 123, so that the switching valve 12 is switched between the first state and the second state, so that the sensor 13 can measure the pressure or perform zero calibration on the sensor 13, and the switching method is simple and convenient. Before the blood pressure measurement is required, the switching valve 12 is switched to the second state by the handle 123, and the sensor 13 is zero-calibrated, and then switched to the first state, so that the sensor 13 can accurately reflect the blood pressure change and increase the working reliability of the blood pump system 1.

[0064] Exemplarily, the valve core 122 may have a valve core channel therein, and the valve core 122 is moved by the handle 123 so that the valve core channel connects the inlet 12b and the first outlet 12c, or connects the inlet 12b and the second outlet 12d, so that the switching valve 12 switches between the first state and the second state.

[0065] For some examples, see Figure 3 The inlet 12b and the first outlet 12c are arranged on opposite sides of the valve core 122. The end of the valve seat 121 close to the inlet 12b has an interface 12e, and the interface 12e is connected to the flow channel 12a. The sensor 13 is arranged at the interface 12e for collecting the pressure of the liquid at the interface 12e.

[0066] That is, in the first state, the flow direction of the fluid at the inlet 12b can be substantially consistent with the flow direction of the fluid at the first outlet 12c, so as to increase the fluid flow stability.

[0067] The sensor 13 is disposed at one end of the valve seat 121 close to the inlet 12b, which, on the one hand, does not affect the docking of the first connecting tube 14, the second connecting tube 15 and the switching valve 12, and on the other hand, is convenient for making full use of the space and increasing the overall layout reliability of the blood pump system 1. The sensor 13 can directly contact the fluid in the flow channel 12a through the interface 12e, thereby sensing the pressure change.

[0068] It can be understood that the sensor 13 is inserted into the interface 12e in a sealed manner to reduce the possibility of fluid overflowing from the interface 12e.

[0069] In some embodiments, the valve seat 121 is an integrated structure; and / or the handle 123 and the valve core 122 are an integrated structure.

[0070] That is, the valve seat 121 is integrally formed; and / or the handle 123 and the valve core 122 are integrally formed, so that when installing the switching valve 12, it is only necessary to assemble the valve seat 121, the handle 123 and the valve core 122 as a whole, which is simple and convenient to install and reduces the number of assembly steps. In addition, the sensor 13 can also be directly installed on the valve seat 121 without the aid of auxiliary components, and the structure of the sensor assembly is simpler.

[0071] In some embodiments, the blood pump system 1 further comprises a pump body 10 and a pump tube 11 , wherein the pump body 10 has a blood inlet for communicating with the ventricle and a blood outlet for communicating with the aorta, and the pump body 10 is used to pump blood from the blood inlet to the blood outlet.

[0072] It is understandable that the pump body 10 can provide power for the blood to flow. For example, the heart is the power organ of the human body. The main function of the heart is to provide power for the blood flow and transport blood to various parts of the body. When the patient's heart has problems and cannot provide power, the patient is prone to life-threatening. For high-risk and complex coronary heart disease patients, myocardial ischemia caused by short-term blood flow blockage during percutaneous coronary intervention or increased cardiac load due to contrast agent injection can cause circulatory collapse or even sudden death. At this time, the pump body 10 can provide power for the patient's blood and pump blood from the ventricle to the artery.

[0073] Exemplarily, the pump body 10 may include a pump housing, a stator and a rotor. The pump housing is generally in the shape of an elongated tube, the rotor is disposed in the pump housing, and the stator is used to drive the rotor to rotate. During the rotation of the rotor, a negative pressure is formed at the blood inlet, so that the blood in the ventricle enters the pump housing through the blood inlet, and the mechanical energy is converted into the kinetic energy and pressure potential energy of the blood through the work done by the rotor, and the blood is discharged from the blood outlet into the aorta, thereby achieving the purpose of ventricular assist.

[0074] The conduit 11 connects the pump body 10 and the sensor assembly. That is, the sensor assembly is not directly connected to the pump body 10.

[0075] The pump body 10 also has a collection port 10a for communicating with the aorta. The second connecting tube 15 is inserted into the catheter 11 and the pump body 10, and the second end of the second connecting tube 15 is communicated with the collection port 10a.

[0076] That is, the second end of the second connecting tube 15 is connected to the aorta through the collection port 10a. Except for the second end of the second connecting tube 15 being connected to the collection port 10a, the outside of the second connecting tube 15 does not directly contact the blood, so as to increase the stability of fluid flow, and the catheter 11 protects the second connecting tube 15.

[0077] For some examples, see Figure 1 The blood pump system 1 includes a handle 18, a circuit board 19 and a wiring harness connector 20. The end of the catheter 11 away from the pump body 10 is connected to the handle 18. The handle 18 has a storage space 18a. The switching valve 12, the circuit board 19 and the sensor 13 are arranged in the storage space 18a. The sensor 13 and the wiring harness connector 20 are electrically connected to the circuit board 20 respectively. The wiring harness connector 20 is used to connect with an external cable.

[0078] Specifically, the sensor 13 is electrically connected to the circuit board 19, and the circuit board 19 is connected to the wiring harness connector 20, so that the pressure signal collected by the sensor 13 can be transmitted to an external device through the circuit board 19 and the wiring harness connector 20 to monitor the changes in blood pressure parameters in real time.

[0079] The external cable is used to connect an external device, such as a monitor, to display the blood pressure.

[0080] The handle 10 can place the switching valve 12, the sensor 13, the circuit board 19, etc. together, which can protect the components on the one hand and facilitate the operation of the user on the other hand.

[0081] The harness connector 20 and the conduit 11 are connected to opposite ends of the handle 18 in the length direction.

[0082] That is to say, one end of the handle 18 along the length direction is connected to the catheter 11, and the other end is connected to the wiring harness connector 20. In this way, the user can insert the pump body 10 and the catheter 11 into the human body by operating the handle 18. The wiring harness connector 20 is located outside the body and away from the catheter 11, which is convenient for connecting external cables and reduces the probability of interference with the catheter 11.

[0083] It can be understood that in addition to providing a space for the second connecting tube 15 to pass through, the conduit 11 can also be used for the wire connected to the pump body 10 to pass through. One end of the wire passes through the conduit 11 and is connected to the pump body 10, and the other end passes through the accommodating space 18a and is connected to the circuit board 19 to provide power for the pump body 10.

[0084] For some examples, see Figure 1 and Figure 2 The pump body 10 has a contraction shell segment 101, through which the pump body 10 is connected to the conduit 11. The cross-sectional area of ​​the contraction shell segment 101 gradually decreases in the direction approaching the conduit 11. The collection port 10a penetrates the side wall of the contraction shell segment 101. The second end of the second connecting pipe 15 extends into the contraction shell segment 101 and is connected to the edge of the collection port 10a.

[0085] Specifically, the pump body 10 is connected to the catheter 11 through the contraction shell segment 101, and the wire in the catheter 11 can be passed through the contraction shell segment 101 to be connected to the stator. The fluid at the second connecting tube 15 can be connected to the blood in the aorta through the collection port 10a, so that the blood pressure of the aorta is transmitted to the sensor 13 through the fluid through pressure transmission to monitor the real-time pressure changes of the blood. In addition, the second connecting tube 15 is connected to the edge of the collection port 10a, which can also reduce the probability of blood entering the contraction shell segment 101 or contacting the wire in the catheter 11 through the joint between the second connecting tube 15 and the collection port 10a, thereby increasing the working reliability of the blood pump system 1.

[0086] It is understandable that the connection method between the second end of the second connecting tube 15 and the edge of the collection port 10a is not limited, and can be gluing or other connection methods.

[0087] For some examples, see Figure 1 and Figure 2 The pump body 10 includes a first straight section 102 and a second straight section 103. The contraction shell section 101 is connected to one end of the first straight section 102. The second straight section 103 extends obliquely from the other end of the first straight section 102 toward the first side of the first straight section 102. The collection port 10a is arranged on a side of the contraction shell section 101 facing the first side.

[0088] It can be understood that the second straight segment 103 is arranged close to the ventricle, and the first straight segment 102 is arranged close to the aorta. The blood inlet can be arranged in the second straight segment 103, and the blood outlet can be arranged in the first straight segment 102.

[0089] The second straight section 103 extends obliquely from the other end of the first straight section 102 toward the first side of the first straight section 102, that is, the pump body 10 is generally curved as a whole. The inclined second straight section 103 can be easily inserted into the ventricle, reducing the probability of the pump body 10 colliding with the inner wall of the ventricle, thereby reducing damage to the inner wall of the ventricle.

[0090] It can be understood that the first side refers to the side of the first straight segment 102 along the radial direction and close to the ventricle.

[0091] It can be understood that the side of the lesser curvature of the aortic arch faces the ventricle. In the present embodiment, the collection port 10a is arranged on the side of the contraction shell segment 101 facing the first side, that is, the collection port 10a is arranged roughly toward the side of the lesser curvature of the aortic arch. In this way, the probability that the collection port 10a and the side of the greater curvature of the aortic arch will stick to the wall during the implantation of the pump body 10 and affect the pressure transmission and thus affect the detection accuracy of the sensor 13 can be reduced.

[0092] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0093] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A blood pump system, characterized in that: A sensor assembly is included, the sensor assembly comprising: A switching valve having a flow channel, an inlet and a first outlet, wherein the switching valve has a first state, and in the first state, the flow channel connects the inlet and the first outlet; A first connecting pipe, connected to the inlet, for introducing fluid; a second connecting tube, wherein a first end of the second connecting tube is connected to the first outlet, and a second end of the second connecting tube is used to be connected to the aorta; A sensor, disposed on the switching valve, for detecting the pressure of the flow channel; Wherein, the inner diameter of the flow channel is not larger than the inner diameter of the first connecting pipe, and is not smaller than the inner diameter of the second connecting pipe.

2. The blood pump system according to claim 1, characterized in that The inner diameter of the flow channel is equal to the inner diameter of the first connecting pipe; and / or the inner diameter of the flow channel is equal to the inner diameter of the second connecting pipe.

3. The blood pump system according to claim 1, characterized in that The sensor is arranged at one end of the switching valve close to the inlet and penetrates the flow channel.

4. The blood pump system according to claim 1, characterized in that The switching valve further has a second outlet, the sensor assembly includes a third connecting pipe, one end of the third connecting pipe is connected to the second outlet, and the other end is used to communicate with atmospheric pressure, the switching valve includes a second state, in the first state, the second outlet is closed; In the second state, the flow channel communicates with the inlet and the second outlet, and the first outlet is closed.

5. The blood pump system according to claim 4, characterized in that The switching valve includes a valve seat, a valve core and a handle. At least a portion of the valve core is accommodated in the valve seat. The handle is arranged outside the valve seat and connected to the valve core for driving the valve core to move so that the switching valve can switch between the first state and the second state.

6. The blood pump system according to claim 5, characterized in that The inlet and the first outlet are arranged on opposite sides of the valve core, and the valve seat has an interface at one end close to the inlet, which is communicated with the flow channel. The sensor is arranged at the interface to collect the pressure of the liquid at the interface.

7. The blood pump system according to claim 5, characterized in that The valve seat is an integrated structure; and / or the handle and the valve core are an integrated structure.

8. The blood pump system according to claim 1, characterized in that The blood pump system also includes a pump body and a catheter. The pump body has a blood inlet for communicating with the ventricle and a blood outlet for communicating with the aorta. The pump body is used to pump blood from the blood inlet to the blood outlet. The catheter connects the pump body and the sensor assembly. The pump body also has a collection port for communicating with the aorta. The second connecting tube is inserted into the catheter and the pump body, and the second end of the second connecting tube is connected to the collection port.

9. The blood pump system according to claim 8, characterized in that The blood pump system includes a handle, a circuit board and a wiring harness connector. The end of the catheter away from the pump body is connected to the handle. The handle has a storage space. The switching valve, the circuit board and the sensor are all arranged in the storage space. The sensor and the wiring harness connector are electrically connected to the circuit board respectively. The wiring harness connector is used to be plugged into an external cable. The wiring harness connector and the catheter are connected to opposite ends of the handle in the length direction.

10. The blood pump system according to claim 8, characterized in that The pump body has a contraction shell segment, and the pump body is connected to the conduit through the contraction shell segment. The cross-sectional area of ​​the contraction shell segment gradually decreases in the direction approaching the conduit. The collection port penetrates the side wall of the contraction shell segment, and the second end of the second connecting pipe extends into the contraction shell segment and is connected to the edge of the collection port.

11. The blood pump system according to claim 10, characterized in that The pump body includes a first straight section and a second straight section, the contraction shell section is connected to one end of the first straight section, the second straight section extends obliquely from the other end of the first straight section toward a first side of the first straight section, and the collection port is arranged on a side of the contraction shell section facing the first side.

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