Pumping catheter and ventricular assist device

Abstract

The utility model provides a blood pumping catheter and a ventricular assist device.The blood pumping catheter comprises a catheter body, an impeller and an ultrasonic detection piece, the far end of the catheter body is provided with a blood flow channel in the axial direction, the blood flow channel is provided with a suction inlet and an outflow opening, the suction inlet and the outflow opening are located in the two ends of the blood flow channel, and at least part of the impeller is arranged in the blood flow channel; the ultrasonic detection part comprises at least one detection part, and the detection part is arranged on the side wall corresponding to the blood flow channel or near the blood flow channel, so that the tissue structure near the tube body can be detected through the detection part in the intervention process of the blood pumping catheter or in the subsequent use process of the blood pumping catheter; on one hand, the position precision of the blood pumping catheter can be improved, and on the other hand, due to the fact that the detection component is located in the catheter body, the tissue structure of the detectable area can be monitored in real time for a long time in the using process of the blood pumping catheter through the detection component, and a doctor can conveniently and accurately judge the state of a patient; the life safety of the patient is favorably guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and in particular relates to a blood pumping catheter and a ventricular assist device. Background Art

[0002] A blood pumping catheter can be inserted into a patient's body to transport blood. For example, it can pump blood from the patient's left ventricle to the aorta, allowing it to flow from the aorta to the patient's tissues and organs, thereby assisting ventricular function. During the use of a blood pumping catheter, its relative position is very important. If positioned properly, it can assist in blood delivery, delivering blood to the target area and improving the patient's hemodynamic status. If positioned incorrectly, it can worsen the patient's condition and even cause long-term harm such as hemolysis and tissue damage.

[0003] Currently, the position of the blood pumping catheter can be indirectly characterized based on changes in the pressure waveform during blood pressure testing or changes in the pressure differential at the impeller. Alternatively, the position of the blood pumping catheter can be observed during the interventional procedure using techniques such as extracorporeal ultrasound and digital subtraction angiography. However, the position of the blood pumping catheter obtained using the above-mentioned blood pressure testing methods or impeller pressure differential change methods has poor accuracy, and techniques such as extracorporeal ultrasound and digital subtraction angiography cannot monitor the position of the blood pumping catheter in real time over a long period of time. Utility Model Content

[0004] The embodiments of the present application provide a blood pumping catheter and a ventricular assist device, which can improve the positioning accuracy of the blood pumping catheter and can monitor the blood pumping catheter in a long-term and real-time manner to ensure the patient's life safety.

[0005] In a first aspect, the present application provides a blood pumping catheter, comprising a tube body, an impeller, and an ultrasonic detector. A blood flow channel is axially provided at the distal end of the tube body, and an intake port and an outflow port are provided on the blood flow channel, the intake port and the outflow port being located at both ends of the blood flow channel, respectively. At least a portion of the impeller is disposed in the blood flow channel. The ultrasonic detector comprises at least one detection component, which is disposed on a side wall corresponding to the blood flow channel or is disposed near the blood flow channel.

[0006] In some embodiments, the ultrasonic detector further includes an ultrasonic base, which is disposed at the distal end of the tube body. In the axial direction of the tube body, the suction port is located between the tube body and the ultrasonic base. The detection component is disposed on the ultrasonic base, and the detection component extends toward the blood flow channel.

[0007] In some embodiments, the tube body includes a tube body and multiple connecting parts, and the multiple connecting parts are arranged at the distal end of the tube body at intervals along the circumference of the tube body. The end of the connecting part away from the tube body is connected to the ultrasound base. Along the circumference, a suction port is formed between two adjacent connecting parts, and some detection components are located on the inner wall surface of the connecting part facing the blood flow channel or between two adjacent connecting parts.

[0008] In some embodiments, the tube body includes a first tube segment and a second tube segment arranged in sequence, part of the first tube segment is embedded in the second tube segment along the length direction of the tube body, and the detection component is clamped between the inner wall surface of the second tube segment and the outer wall surface of the first tube segment.

[0009] In some embodiments, the tube body includes an inner tube and an outer tube stacked in a direction away from the blood flow channel, and the detection component is arranged between the inner tube and the outer tube.

[0010] In some embodiments, the blood pumping catheter further includes a transmission shaft axially arranged from the proximal end of the tube body to the distal end of the tube body, one end of the transmission shaft is connected to the impeller, and the detection component is arranged on the transmission shaft.

[0011] In some embodiments, the detection component is disposed around the circumference of the tube body; or, a plurality of detection components are distributed at intervals along the circumference of the tube body.

[0012] In some embodiments, the detection component is a thin film ultrasonic probe, which includes a substrate, a bottom electrode, a piezoelectric layer and a top electrode. The bottom electrode is arranged on the substrate; the piezoelectric layer is arranged on the side of the bottom electrode facing away from the substrate, and the piezoelectric layer includes a plurality of piezoelectric columns that are electrically connected to each other and arranged at intervals; the top electrode is arranged on the side of the piezoelectric layer facing away from the substrate.

[0013] In some embodiments, the piezoelectric layer further includes a connecting sublayer, which is located between the bottom electrode and the piezoelectric pillar, and the piezoelectric pillars are electrically connected through the connecting sublayer; and / or, the piezoelectric layer further includes a planarization sublayer, which fills the gaps between the piezoelectric pillars.

[0014] A second aspect of the present application provides a ventricular assist device comprising any one of the above blood pumping catheters.

[0015] An embodiment of the present application provides a blood pumping catheter and a ventricular assist device, wherein the blood pumping catheter includes a tube body, an impeller and an ultrasonic detector. A blood flow channel is axially provided at the distal end of the tube body, and an intake port and an outflow port are provided on the blood flow channel. The intake port and the outflow port are respectively located at the two ends of the blood flow channel, and at least part of the impeller is arranged in the blood flow channel. The ultrasonic detector includes at least one detection component, which is arranged on the side wall corresponding to the blood flow channel or the detection component is arranged near the blood flow channel. Therefore, during the process of intervention of the blood pumping catheter on the patient, the position of the tube body can be monitored in real time through the detection component, which is beneficial for the operator to adjust the position of the tube body based on the monitoring data of the detection component, so that the intake port is located in the ventricle and the outflow port is located in the aorta, so that the blood in the patient's ventricle is sucked into the aorta by the suction force generated by the rotation of the impeller to assist the ventricle in working. In the present application, the detection component is used to detect the tissue structure near the tube body during the intervention process of the blood pumping catheter or during the subsequent use of the blood pumping catheter. On the one hand, the positioning accuracy of the blood pumping catheter can be improved. On the other hand, since the detection component is located inside the tube body, the detection component can also monitor the tissue structure of the detectable area for a long time and in real time during the use of the blood pumping catheter, which is convenient for doctors to accurately judge the patient's condition and is beneficial to ensuring the patient's life safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 is a schematic structural diagram of a blood pumping catheter provided in some embodiments of the present application;

[0018] Figure 2 is a partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application;

[0019] Figure 3 is a partial schematic diagram of a blood pumping catheter provided in some embodiments of the present application;

[0020] Figure 4 is another partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application;

[0021] Figure 5 is another partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application;

[0022] Figure 6 is a schematic structural diagram of a blood pumping catheter provided in some embodiments of the present application;

[0023] Figure 7is another partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application;

[0024] Figure 8 is another partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application;

[0025] Figure 9 This is a partial schematic diagram of a blood pumping catheter provided in some embodiments of the present application.

[0026] Tag Name:

[0027] Tube body 10; tube body 101; connecting portion 102; first tube section 103; second tube section 104; inner tube 105; outer tube 106; intermediate tube 107; blood flow channel 11; suction port 12; outflow port 13; impeller 20; ultrasonic probe 30; detection component 31; ultrasonic base 32; ventricle 40; aorta 50; transmission shaft 60. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising 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, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0030] Figure 1 is a schematic diagram of the structure of a blood pumping catheter provided in some embodiments of the present application. Figure 2 It is a partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application.

[0031] like Figure 1 and Figure 2 As shown, the first aspect of the present application provides a blood pumping catheter, including a tube body 10, an impeller 20 and an ultrasonic detector 30. The distal end of the tube body 10 is provided with a blood flow channel 11 along the axial direction, and the blood flow channel 11 is provided with a suction port 12 and an outflow port 13, and the suction port 12 and the outflow port 13 are respectively located at the two ends of the blood flow channel 11; at least part of the impeller 20 is arranged in the blood flow channel 11; the ultrasonic detector 30 includes at least one detection component 31, and the detection component 31 is arranged on the side wall corresponding to the blood flow channel 11 or the detection component 31 is arranged near the blood flow channel 11.

[0032] A blood flow channel 11 is axially provided at the distal end of the tube body 10. The blood flow channel 11 allows blood to flow. A suction port 12 and an outflow port 13 are provided on the blood flow channel 11. The suction port 12 and the outflow port 13 are located at both ends of the blood flow channel 11, respectively. The suction port 12 can be located near the distal end of the tube body 10, and the outflow port 13 can be located near the proximal end of the tube body 10. When the blood pump catheter is inserted into the patient's body, the suction port 12 can be located in the ventricle 40, and the outflow port 13 can be located in the aorta 50. At least a portion of the impeller 20 is located in the blood flow channel 11. When the impeller 20 rotates, it can place the blood flow channel 11 in a negative pressure state, thereby drawing blood from the patient's ventricle 40 into the blood flow channel 11 from the suction port 12. The blood in the blood flow channel 11 can then flow from the outflow port 13 into the patient's aorta 50, thereby assisting the operation of the ventricle 40.

[0033] The ultrasonic detector 30 includes at least one detection component 31, which is disposed within the tube body 10, specifically on the sidewall corresponding to the blood flow channel 11 or disposed near the blood flow channel 11. This allows for real-time and accurate detection of the relative position of the tube body 10 and the patient's anatomy. During the insertion of the blood pumping catheter into the patient's body, the operator can adjust the position of the tube body 10 based on the monitoring data from the detection component 31 to ensure proper insertion of the tube body 10, thereby reducing the difficulty of blood pumping catheter insertion and improving the accuracy of the blood pumping catheter's position. Furthermore, the detection component 31 can also provide long-term, real-time monitoring of the tissue structure of the detectable area during subsequent use of the blood pumping catheter, reflecting the physiological characteristics of the patient's corresponding tissue, allowing the doctor to accurately determine the patient's condition and ensuring the patient's life safety.

[0034] In addition, in this embodiment, the detection component 31 is located inside the tube body 10. Compared with being located outside the tube body 10, it does not need to directly contact the patient's human tissue, which can reduce the risk of the detection component 31 damaging the human body and improve safety. At the same time, it can also increase the service life of the detection component 31 to a certain extent.

[0035] It should be noted that the detection component 31 being located on the side wall corresponding to the blood flow channel 11 can mean that the detection component 31 is located on the inner wall surface of the tube body 10 facing the blood flow channel 11. Alternatively, the detection component 31 can be located at other locations on the tube body 10 near the blood flow channel 11, for example, near the suction port 12 or near the outflow port 13, and this embodiment does not limit this. The number of detection components 31 can be one or more, and this embodiment does not limit this.

[0036] Figure 3 This is a partial schematic diagram of a blood pumping catheter provided in some embodiments of the present application.

[0037] like Figure 3 As shown, in some embodiments, the ultrasonic detector 30 further includes an ultrasonic base 32, which is disposed at the distal end of the tube body 10. In the axial direction of the tube body 10, the suction port 12 is located between the tube body 10 and the ultrasonic base 32. The detection component 31 is disposed on the ultrasonic base 32, and the detection component 31 extends toward the blood flow channel 11.

[0038] In these embodiments, an ultrasonic base 32 is disposed at the distal end of the tubular body 10 and can define a suction port 12 with the tubular body 10, with the suction port 12 positioned therebetween. A detection component 31 is disposed on the ultrasonic base 32 and extends into the blood flow channel 11 to accurately detect the position of the suction port 12, ensuring that the suction port 12 is located within the patient's ventricle 40 while also minimizing the impact of the detection component 31 on blood flow.

[0039] It should be noted that the ultrasonic base 32 and the detection component 31 can be an integrally formed structure, or they can be separate structures and connected together by bolt connection, adhesive connection, embedded connection, etc., which is not limited in this embodiment. The shape of the detection component 31 can be square or conical, which is not limited in this embodiment.

[0040] Optionally, the blood pumping catheter may further include an introduction hose, which is arranged on the side of the ultrasound base 32 away from the tube body 10 and is used to act as a buffer between the tube body 10 and human tissue during the intervention process of the tube body 10 to prevent the tube body 10 from damaging human tissue.

[0041] Figure 4 is another partial cross-sectional view of a blood pumping catheter provided in some embodiments of the present application. Figure 5 This is another partial cross-sectional view of the blood pumping catheter provided in some embodiments of the present application.

[0042] like Figure 4 and Figure 5As shown, in some embodiments, the tube body 10 includes a tube body 101 and a plurality of connecting portions 102. The plurality of connecting portions 102 are arranged at the distal end of the tube body 101 at intervals along the circumference of the tube body 101. One end of the connecting portion 102 away from the tube body 101 is connected to the ultrasonic base 32. Along the circumferential direction, a suction port 12 is formed between two adjacent connecting portions 102. Part of the detection component 31 is located on the inner wall surface of the connecting portion 102 facing the blood flow channel 11 or between two adjacent connecting portions 102.

[0043] The connecting portion 102 can be an integral structure with the tube body 101, or a structure independent of the tube body 101, and this embodiment does not limit this. The connecting portion 102 is arranged at the distal end of the tube body 101, and can jointly define the suction port 12 with the end of the tube body 101 close to the ultrasonic base 32 and the end of the ultrasonic base 32 close to the tube body 101. Multiple connecting portions 102 are arranged at intervals along the circumference of the tube body 101, and the suction port 12 is located between two adjacent connecting portions 102, so that the suction port 12 is distributed at intervals along the circumference of the tube body 101. Therefore, the blood in the patient's body can enter the blood flow channel 11 through the multiple suction ports 12, which can increase the blood circulation speed. It should be noted that the "axial direction", "circumferential direction", etc. mentioned in the embodiments of the present application can refer to the axial direction and circumferential direction of the tube body 10.

[0044] The detection component 31 is connected to the ultrasonic base 32, which can be Figure 4 As shown, it extends to the inner wall of the connecting portion 102 toward the blood flow channel 11, or it can also be as shown. Figure 5 As shown, it extends between two adjacent connecting portions 102 , so that the position of the detection component 31 can be set according to actual needs to obtain different signals.

[0045] Figure 6 is a schematic diagram of the structure of a blood pumping catheter provided in some embodiments of the present application. Figure 7 This is another partial cross-sectional view of the blood pumping catheter provided in some embodiments of the present application.

[0046] like Figure 6 and Figure 7 As shown, in some embodiments, the tube body 10 includes a first tube segment 103 and a second tube segment 104 arranged in sequence, part of the first tube segment 103 is embedded in the second tube segment 104 along the length direction of the tube body 10, and the detection component 31 is clamped between the inner wall surface of the second tube segment 104 and the outer wall surface of the first tube segment 103.

[0047] The first tube segment 103 and the second tube segment 104 are arranged in sequence along the length direction of the tube body 10. Flow channels are formed in the first tube segment 103 and the second tube segment 104. When part of the first tube segment 103 is inserted into the second tube segment 104 along the length direction of the tube body 10, the flow channels in the first tube segment 103 and the second tube segment 104 can be connected to each other to form a blood flow channel 11.

[0048] Both the first tube segment 103 and the second tube segment 104 include an inner wall facing the flow channel and an outer wall facing away from the flow channel. When the tube body 10 is inserted into the patient's body, the outer wall is closer to the patient's anatomy than the inner wall. A portion of the first tube segment 103 is inserted into the second tube segment 104 along the length of the tube body 10. The outer wall of the first tube segment 103 can be positioned close to the inner wall of the second tube segment 104, while the inner wall of the first tube segment 103 and the outer wall of the second tube segment 104 can be positioned away from each other. In this case, the blood flow channel 11 is defined by the inner wall of the first tube segment 103 and the portion of the inner wall of the second tube segment 104 not in contact with the first tube segment 103.

[0049] In these embodiments, the detection component 31 is sandwiched between the inner wall of the second tube segment 104 and the outer wall of the first tube segment 103 by the first tube segment 103 and the second tube segment 104. This prevents the detection component 31 from interfering with blood circulation. Furthermore, compared to connecting the detection component 31 to the tube body 10 via adhesive or other methods, this prevents adhesive or other connection structures from impacting patient safety. Furthermore, the detection component 31 being sandwiched between the inner wall of the second tube segment 104 and the outer wall of the second tube segment 104 reduces contact between the detection component 31 and blood within the blood flow channel 11, thereby improving the service life of the detection component 31 and the quality of the blood.

[0050] Optionally, the second tube segment 104 may include a first sub-tube and a second sub-tube, the first sub-tube being connected between the second sub-tube and the first tube segment 103, and at least a portion of the first sub-tube may be a soft tube, which may bend during the intervention process of the tube body 10 to facilitate the tube body 10 to enter from one part of the patient's body to another, thereby reducing the difficulty of intervention.

[0051] It should be noted that the suction port 12 can be provided on one of the second sub-tube and the first pipe section 103, and the outflow port 13 can be provided on the other, and this embodiment does not limit this. This application takes the suction port 12 provided on the first pipe section 103 and the outflow port 13 provided on the second sub-tube as an example for description.

[0052] Optionally, at least a portion of the second pipe section 104 may be made of insulating material to facilitate the detection component 31 to transmit signals to the outside or receive external signals.

[0053] Figure 8This is another partial cross-sectional view of the blood pumping catheter provided in some embodiments of the present application.

[0054] like Figure 8 As shown, in some embodiments, the tube body 10 includes an inner tube 105 and an outer tube 106 stacked in a direction away from the blood flow channel 11. The detection component 31 is disposed between the inner tube 105 and the outer tube 106. This prevents the detection component 31 from interfering with blood circulation. Furthermore, compared to connecting the tube body 10 via adhesive or other methods, the adhesive or other connection structure can be prevented from affecting patient safety. Furthermore, because the detection component 31 is located between the inner tube 105 and the outer tube 106, it can also prevent contact between the detection component 31 and the blood in the blood flow channel 11, further improving the service life of the detection component 31 and the quality of the blood.

[0055] Optionally, the tube body 10 further includes an intermediate tube 107 disposed between the inner tube 105 and the outer tube 106 . The intermediate tube 107 may be located on one side of the detection component 31 , or the detection component 31 may be located inside the intermediate tube 107 to improve the structural strength of the tube body 10 .

[0056] Figure 9 This is a partial schematic diagram of a blood pumping catheter provided in some embodiments of the present application.

[0057] like Figure 9 As shown, in some embodiments, the blood pumping catheter further includes a transmission shaft 60 axially arranged from the proximal end of the tube body 10 to the distal end of the tube body 10, one end of the transmission shaft 60 is connected to the impeller 20, and the detection component 31 is arranged on the transmission shaft 60. During the assembly process of the blood pumping catheter, the detection component 31 can be first assembled to the transmission shaft 60, and then the transmission shaft 60 can be installed into the tube body 10, so that the detection component 31 is located inside the tube body 10, which can reduce the difficulty of assembling the detection component 31.

[0058] Optionally, there are various ways to connect the detection component 31 to the transmission shaft 60. For example, the detection component 31 can be glued to the outer wall surface of the transmission shaft 60, or the detection component 31 can be embedded in the transmission shaft 60. This embodiment does not limit this.

[0059] Optionally, the blood pumping catheter may further include a sheath tube, which is disposed at the proximal end of the tube body 10 . The transmission shaft 60 may be located inside the sheath tube and extend to connect with the driving motor.

[0060] Optionally, the transmission shaft 60 may also extend in a direction close to the suction port 12 , and the detection component 31 may be disposed close to the suction port 12 so as to accurately detect the position of the suction port 12 through the detection component 31 .

[0061] In some embodiments, the detection component 31 is disposed around the circumference of the tube body 10; or, a plurality of detection components 31 are distributed at intervals along the circumference of the tube body 10, which can effectively improve detection reliability.

[0062] In some embodiments, the detection component 31 is a thin film ultrasonic probe, which includes a substrate, a bottom electrode, a piezoelectric layer and a top electrode. The bottom electrode is arranged on the substrate; the piezoelectric layer is arranged on the side of the bottom electrode facing away from the substrate, and the piezoelectric layer includes a plurality of piezoelectric columns that are electrically connected to each other and arranged at intervals; the top electrode is arranged on the side of the piezoelectric layer facing away from the substrate.

[0063] In these embodiments, the detection component 31 is a thin-film ultrasonic probe, which is compact and has high detection accuracy. The detection component 31 comprises a stacked substrate, a bottom electrode, a piezoelectric layer, and a top electrode. The piezoelectric layer includes multiple electrically connected piezoelectric pillars. Each piezoelectric pillar generates a piezoelectric effect when energized, producing mechanical vibrations and thereby emitting ultrasonic signals. The top and bottom electrodes are positioned on opposite sides of the piezoelectric layer, effectively transmitting the electric field so that each piezoelectric pillar in the piezoelectric layer can receive the electrical signal and generate a piezoelectric effect, thereby efficiently generating ultrasonic signals.

[0064] In addition, by setting the piezoelectric layer to include multiple piezoelectric columns arranged at intervals, the bending performance of the detection component 31 can be improved compared to setting the piezoelectric layer as a whole layer. During the process of inserting the blood pumping catheter into the patient's body, the detection component 31 can better adapt to the bending of the blood pumping catheter, avoiding the influence of its own detection accuracy and performance due to the bending of the blood pumping catheter.

[0065] In some embodiments, the piezoelectric layer further includes a connecting sublayer, which is located between the bottom electrode and the piezoelectric pillar, and the piezoelectric pillars are electrically connected through the connecting sublayer; and / or, the piezoelectric layer further includes a planarization sublayer, which fills the gaps between the piezoelectric pillars.

[0066] The connecting sublayer can be made of a conductive material. Preferably, it can be made of the same material as the piezoelectric pillars. This allows the connecting sublayer to be manufactured using the same process as the piezoelectric pillars, reducing manufacturing complexity and improving production efficiency. The connecting sublayer is positioned between the piezoelectric pillars and the bottom electrode, connecting to the piezoelectric pillars. This not only provides electrical connectivity between the piezoelectric pillars but also provides an additional mechanical connection, enhancing the overall structural strength of the piezoelectric layer.

[0067] It can be understood that since the piezoelectric pillars are arranged at intervals, there is a gap between two adjacent piezoelectric pillars. Therefore, in this embodiment, the piezoelectric layer includes a flattening sublayer, so that the flattening sublayer fills the gap between the piezoelectric pillars, thereby making the surface of the piezoelectric layer facing away from the bottom electrode flat, so that the top electrode can be formed on the flat surface of the piezoelectric layer, which can improve the performance and production yield of the top electrode.

[0068] A second aspect of the present application provides a ventricular assist device comprising any one of the above blood pumping catheters.

[0069] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A blood pumping catheter, characterized in that: include: A tube body, wherein a blood flow channel is axially provided at the distal end of the tube body, and a suction port and an outflow port are provided on the blood flow channel, wherein the suction port and the outflow port are respectively located at two ends of the blood flow channel; an impeller, at least a portion of which is disposed in the blood flow channel; The ultrasonic detection component includes at least one detection component, and the detection component is arranged on the side wall corresponding to the blood flow channel or the detection component is arranged near the blood flow channel.

2. The blood pumping catheter according to claim 1, characterized in that The ultrasonic detector also includes an ultrasonic base, which is arranged at the distal end of the tube body. In the axial direction of the tube body, the suction port is located between the tube body and the ultrasonic base. The detection component is arranged on the ultrasonic base and extends toward the blood flow channel.

3. The blood pumping catheter according to claim 2, characterized in that: The tube body includes a tube body and multiple connecting parts, and the multiple connecting parts are arranged at the distal end of the tube body at intervals along the circumference of the tube body. One end of the connecting part away from the tube body is connected to the ultrasound base. The suction port is formed between two adjacent connecting parts along the circumference. Part of the detection component is located on the inner wall surface of the connecting part facing the blood flow channel or between two adjacent connecting parts.

4. The blood pumping catheter according to claim 1, characterized in that The tube body includes a first tube segment and a second tube segment arranged in sequence, part of the first tube segment is embedded in the second tube segment along the length direction of the tube body, and the detection component is clamped between the inner wall surface of the second tube segment and the outer wall surface of the first tube segment.

5. The blood pumping catheter according to claim 1, characterized in that The tube body comprises an inner tube and an outer tube stacked in a direction away from the blood flow channel, and the detection component is arranged between the inner tube and the outer tube.

6. The blood pumping catheter according to claim 1, characterized in that The blood pumping catheter further includes a transmission shaft axially arranged from the proximal end of the tube body to the distal end of the tube body, one end of the transmission shaft is connected to the impeller, and the detection component is arranged on the transmission shaft.

7. The blood pumping catheter according to any one of claims 1 to 6, characterized in that: The detection component is disposed around the circumference of the tube body; or, a plurality of the detection components are distributed at intervals along the circumference of the tube body.

8. The blood pumping catheter according to any one of claims 1 to 6, characterized in that: The detection component is a thin film ultrasonic probe, and the detection component includes: substrate; a bottom electrode, disposed on the substrate; a piezoelectric layer disposed on a side of the bottom electrode facing away from the substrate, the piezoelectric layer comprising a plurality of piezoelectric columns electrically connected to each other and spaced apart; The top electrode is arranged on a side of the piezoelectric layer facing away from the substrate.

9. The blood pumping catheter according to claim 8, characterized in that The piezoelectric layer further includes a connecting sublayer, the connecting sublayer is located between the bottom electrode and the piezoelectric pillars, and the piezoelectric pillars are electrically connected via the connecting sublayer; and / or, The piezoelectric layer further includes a planarization sublayer, and the planarization sublayer fills the gaps between the piezoelectric pillars.

10. A ventricular assist device, characterized in that: The blood pumping catheter comprises the blood pumping catheter according to any one of claims 1 to 9.

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