CN220025882U - Left ventricle auxiliary device pump blood pipe and left ventricle auxiliary device - Google Patents
Left ventricle auxiliary device pump blood pipe and left ventricle auxiliary device Download PDFInfo
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- CN220025882U CN220025882U CN202321557759.0U CN202321557759U CN220025882U CN 220025882 U CN220025882 U CN 220025882U CN 202321557759 U CN202321557759 U CN 202321557759U CN 220025882 U CN220025882 U CN 220025882U
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- 239000008280 blood Substances 0.000 title claims abstract description 65
- 210000004369 blood Anatomy 0.000 title claims abstract description 63
- 210000005240 left ventricle Anatomy 0.000 title claims abstract description 28
- 230000002861 ventricular Effects 0.000 claims abstract description 50
- 238000005086 pumping Methods 0.000 claims abstract description 41
- 230000017531 blood circulation Effects 0.000 claims abstract description 10
- 230000008054 signal transmission Effects 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 210000000709 aorta Anatomy 0.000 description 5
- 230000002107 myocardial effect Effects 0.000 description 5
- 230000000747 cardiac effect Effects 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 210000001765 aortic valve Anatomy 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
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- 230000002411 adverse Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004217 heart function Effects 0.000 description 2
- 230000000004 hemodynamic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 206010019280 Heart failures Diseases 0.000 description 1
- 206010024119 Left ventricular failure Diseases 0.000 description 1
- 208000001145 Metabolic Syndrome Diseases 0.000 description 1
- 201000000690 abdominal obesity-metabolic syndrome Diseases 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007012 clinical effect Effects 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 206010012601 diabetes mellitus Diseases 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of medical equipment, and particularly relates to a left ventricle auxiliary device and a blood pumping catheter thereof. The left ventricular assist device pump catheter comprises a sheath tube, a transvalve bent tube and a pigtail tube which are sequentially connected from a proximal end to a distal end; the valve-crossing bent pipe is a multilayer pipe and is provided with an innermost layer, a middle layer and an outermost layer, wherein the innermost layer and the middle layer are arranged at intervals, and a signal transmission channel is formed at intervals between the innermost layer and the middle layer; the signal transmission channel is internally provided with a signal wire, the inner wall of the valve-crossing bent pipe is provided with a pressure sensor, the pressure sensor is connected with a computer of the left ventricle auxiliary device through the signal wire, and the pressure sensor is used for detecting blood flow in the valve-crossing bent pipe. The left ventricular assist device blood pumping catheter is beneficial to monitoring the blood pumping effect of the left ventricular assist device, and further can solve or improve the problem that doctors can conveniently master the left ventricular blood pumping capacity of patients.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, and particularly relates to a left ventricle auxiliary device and a blood pumping catheter thereof.
Background
Left ventricular failure is generally caused by coronary heart disease, immune response, infection, diabetes, metabolic syndrome and other diseases, resulting in weakening of myocardial contractility. In order to ensure normal cardiac discharge, the body can compensate through various mechanisms. As the condition progresses, decompensation may occur, and the myocardial tissue structure is further changed, so that heart failure may occur in the patient.
The pump-blood conduit is a miniature mixed-flow pump placed in blood vessel and is used for conveying the blood of left ventricle into aorta, reducing left ventricle load of patient and enhancing blood circulation system of patient.
The pump catheter is intended to be passed through the percutaneous surface, through the femoral puncture path, into the aortic vascular system, across the aortic valve, and into the left ventricle. After reaching the proper position of the left ventricle, the blood pumping catheter conveys the blood from the left ventricle into the aorta through the suction channel, the transvalvular bent pipe and the outflow channel, thereby achieving the clinical effects of reducing the load of the left ventricle, reducing the oxygen consumption of myocardial cells, increasing the cardiac output, stabilizing the hemodynamic force and the blood circulation, increasing the coronary perfusion flow and the like, and providing a guarantee for the recovery of the cardiac function of a patient and receiving further treatment.
The heart ejection volume refers to the volume of blood ejected from the left ventricle into the main artery of the patient per minute, and mainly reflects the myocardial contractility and the afterload of the heart. In the usual case, the heart displacement per minute is calculated, which should be between 5 and 6L/min, at least not less than 4L/min. At present, the defects of the prior art are mainly that the pumping blood quantity cannot be monitored in real time, so that the doctor is not beneficial to grasping the pumping capacity of the left ventricle of the patient in the operation process.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The utility model aims to provide a left ventricular assist device blood pumping catheter and a left ventricular assist device, which are used for solving or improving the problem that the blood pumping amount cannot be monitored in the use process of the traditional left ventricular assist device blood pumping catheter.
In order to achieve the above object, the present utility model provides the following technical solutions: a left ventricular assist device pump catheter comprising a sheath, a transvalve elbow and a pigtail tube connected in sequence from a proximal end to a distal end; the transvalve bent pipe is a multilayer pipe and is provided with an innermost layer, a middle layer and an outermost layer, wherein the innermost layer and the middle layer are arranged at intervals, and a signal transmission channel is formed at intervals between the innermost layer and the middle layer; the valve-crossing bent pipe is characterized in that a signal line is arranged in the signal transmission channel, a pressure sensor is arranged on the inner wall of the valve-crossing bent pipe and connected with a computer of the left ventricle auxiliary device through the signal line, and the pressure sensor is used for detecting blood flow in the valve-crossing bent pipe.
Preferably, the pressure sensor comprises a first pressure sensor and a second pressure sensor, and the first pressure sensor and the second pressure sensor are connected with the same signal line; the first pressure sensor is arranged at a position on the valve-crossing elbow close to the pigtail pipe, and the second pressure sensor is arranged at a position on the valve-crossing elbow close to the sheath pipe.
Preferably, the innermost layer of the transvalve elbow is a TPU pipe, the middle layer is a spring pipe, and the outermost layer is a TPU pipe.
Preferably, the transvalve elbow comprises a blood outflow tube, a blood inflow tube and a connecting tube; one end of the blood outflow tube is connected with the sheath tube, and the other end of the blood outflow tube is connected with the connecting tube; one end of the blood inflow pipe is connected with the connecting pipe, and the other end of the blood inflow pipe is connected with the pigtail pipe; the connecting pipe is an arc-shaped bent pipe.
Preferably, the blood outflow tube is provided with a liquid outlet, and the blood inflow tube is provided with a liquid inlet.
Preferably, the left ventricular assist device pump catheter further comprises a handle, and the sheath is connected to the handle.
Preferably, the proximal end of the sheath is provided with a first connector and a second connector; the first connecting piece and/or the second connecting piece are/is provided with an inner cavity for accommodating the sheath tube in the axial direction; the first connecting piece is detachably connected with the second connecting piece.
The utility model also provides a left ventricle auxiliary device, which adopts the following technical scheme: a left ventricular assist device comprising a computer and a pump catheter as described above; the computer is connected with the pressure sensor of the pumping catheter through a signal wire.
The beneficial effects are that:
the left ventricular assist device blood pumping catheter is beneficial to monitoring the blood pumping effect of the left ventricular assist device, and further can solve or improve the problem that doctors can conveniently master the left ventricular blood pumping capacity of patients.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:
FIG. 1 is a schematic diagram showing the overall structure of a pump catheter of a left ventricular assist device according to an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a conceptual diagram of a process of calculating the left ventricular pump flow of a patient before and during the start of pumping.
Reference numerals:
1-a handle; 2-a first connector; 3-a second connector; 4-sheath; 5-a transvalve elbow; 6-pigtail tube; 8-signaling channels;
51-a blood outflow tube; 52-connecting pipes; 53-blood inflow tube;
71-a first pressure sensor; 72-a second pressure sensor;
a is a liquid outlet; b-liquid inlet.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may explicitly or implicitly include one or more features.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and for example, it may be a fixed connection or an active connection, or it may be a detachable connection or a non-detachable connection, or it may be an integral connection; may be mechanically connected, may be electrically connected, or may be in communication with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements, indirect communication or interaction relationship between the two elements.
The present utility model will be described in detail with reference to examples. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the following use process of the left ventricular assist device pump catheter, one end close to an operator is a proximal end, and one end far away from the operator is a distal end.
Referring to fig. 1-4, the utility model provides a left ventricular assist device pumping catheter, which aims at the problem that the pumping amount cannot be monitored in the use process of the current left ventricular assist device pumping catheter, and comprises a sheath tube 4, a transvalve bent tube 5 and a pigtail tube 6 which are sequentially connected from the proximal end to the distal end; the valve-crossing bent pipe 5 is a multilayer pipe and is provided with an innermost layer, a middle layer and an outermost layer, wherein the innermost layer and the middle layer are arranged at intervals, and a signal transmission channel 8 is formed at intervals between the innermost layer and the middle layer; the signal conduction channel 8 is internally provided with a signal wire, the inner wall of the valve-crossing bent pipe 5 is provided with a pressure sensor, the pressure sensor is connected with a computer (host) of the left ventricle auxiliary device through the signal wire, and the pressure sensor is used for detecting blood flow in the valve-crossing bent pipe 5.
Wherein the sheath tube 4 mainly plays a supporting role; the pigtail tube 6 mainly serves to guide the catheter into the body. The left ventricular assist device pump catheter of the present utility model is intended to be passed through the percutaneous surface, through the femoral puncture access, into the aorta, across the aortic valve, and into the left ventricle. After reaching the proper position of the left ventricle, the blood pumping catheter pumps blood from the left ventricle to the aorta, so that the effects of the left ventricle auxiliary device such as reducing the load of the left ventricle, reducing the oxygen consumption of myocardial cells, increasing the cardiac output, stabilizing the hemodynamic and blood circulation, increasing the flow of coronary arteries and the like can be exerted, and the heart function recovery and the further treatment and improvement guarantee of the patient can be realized.
According to the left ventricular assist device pumping catheter, the pressure sensor is arranged on the inner wall of the valve-crossing bent pipe 5, the signal transmission channel 8 is arranged between the innermost layer and the middle layer of the valve-crossing bent pipe 5, the signal line (not shown in the figure) is arranged in the signal transmission channel 8, and the pressure sensor is connected with the host of the left ventricular assist device through the signal line, so that when the left ventricular assist device pumping catheter is used, the pressure of blood flowing in the valve-crossing bent pipe 5 can be detected in real time, the detection of the left ventricular pumping flow is facilitated, and doctors can master the left ventricular pumping capacity of patients conveniently.
Specifically, when the pressure sensor works, the sensed pressure signal can be output as an electrical signal, the electrical signal is transmitted to a computer of the left ventricular assist device (the computer of the left ventricular assist device in the prior art can be used, and the computer can calculate the blood flow passing through the valve-crossing elbow 5 according to the received electrical signal. In practical application, after the left ventricular assist device blood pumping catheter is placed at a proper position of a human body, the left ventricular assist device does not pump blood, and blood injected into a main artery from a left ventricle of the human body in a natural state flows through the left ventricular assist device blood pumping catheter, so that the pressure sensor can detect the heart blood discharge quantity of the human body through the blood pumping catheter; then, the left ventricle auxiliary device pumps blood through the blood guide pipe, and the pressure sensor detects the total flow in the blood pumping state of the blood guide pipe; the doctor can be helped to master the left ventricular pumping capacity of the patient by combining 2 signal values detected by the pressure sensors before and after pumping the blood by the pumping catheter, and the pumping effect of the left ventricular auxiliary device is monitored.
Preferably, the pressure sensor is a resistive pressure sensor (more preferably, a miniature resistive pressure sensor is selected).
Preferably, the signal line is glued to the signal conducting channel 8. For example, after the signal line is disposed in the signal conducting channel 8, glue is added, and the signal line is stably fixed in the signal conducting channel 8 by glue, so as to improve the stability of the signal line.
In a preferred embodiment of the present utility model, referring to fig. 4, the pressure sensor includes a first pressure sensor 71 and a second pressure sensor 72, the first pressure sensor 71 and the second pressure sensor 72 being connected to the same signal line; the first pressure sensor 71 is disposed on the transvalve elbow 5 at a position near the pigtail pipe 6, and the second pressure sensor 72 is disposed on the transvalve elbow 5 at a position near the sheath pipe 4. By providing the first pressure sensor 71 and the second pressure sensor 72 and connecting the first pressure sensor 71 and the second pressure sensor 72 to the same signal line, the first pressure sensor 71 and the second pressure sensor 72 can be located on the same signal conduction path; when blood flows through, the first pressure sensor 71 generates an electric signal V1, after a period of time, the blood flowing through the first pressure sensor 71 flows through the second pressure sensor 72 to generate an electric signal V2, and the two electric signals can be converted into a flow Q flowing through the two pressure sensors through a series of calculations by a computer (the flow Q is calculated according to the pressure difference detected by the first pressure sensor 71 and the second pressure sensor 72); if the measured flow rate Q is close to the normal cardiac output (i.e., 5-6L/min), the ability to assist the left ventricular pump at the left ventricular assist device is at a normal level. Preferably, referring to fig. 4, a flow rate normal threshold value may be input in advance into a computer of the left ventricular assist device used in cooperation with the pump-catheter of the present utility model, the computer calculates the flow rate and judges whether the detected flow rate Q is abnormal, and causes the computer to display the flow rate value, and alarm if abnormal.
In the preferred embodiment of the utility model, the innermost layer of the flap elbow 5 is a TPU (polyurethane) tube, the middle layer is a spring tube, and the outermost layer is a TPU tube. The arrangement of the transvalve elbow 5 not only facilitates the left ventricular assist device of the present utility model to pump blood into the aorta and then across the aortic valve into the left ventricle; the provision of the signal-conducting channel 8 is also facilitated to enable detection of the blood flow through the left ventricular assist device pump catheter of the present utility model.
In the preferred embodiment of the present utility model, the transvalve elbow 5 includes a blood outflow tube 51, a blood inflow tube 53 and a connection tube 52; one end of the blood outflow tube 51 is connected to the sheath tube 4, and the other end of the blood outflow tube 51 is connected to the connection tube 52; one end of the blood inflow tube 53 is connected with the connecting tube 52, and the other end of the blood inflow tube 53 is connected with the pigtail tube 6; the connection pipe 52 is an arc-shaped bent pipe.
In the preferred embodiment of the present utility model, the first pressure sensor 71 and the second pressure sensor 72 are provided on the blood outflow tube 51. By providing the first pressure sensor 71 and the second pressure sensor 72 on the blood outflow tube 51, accuracy of the pumping effect detection is facilitated to be ensured.
In the preferred embodiment of the present utility model, the outlet A is provided in the blood outflow tube 51, and the inlet B is provided in the blood inflow tube 53. The liquid outlet A or the liquid inlet B can be provided with necessary components such as an impeller, a pump and the like (refer to the prior art), so that the pumping of the left ventricular assist device pumping catheter can be realized.
In the preferred embodiment of the utility model, the left ventricular assist device pump catheter further comprises a handle 1, and the sheath 4 is connected to the handle 1.
In the preferred embodiment of the utility model, the proximal end of the sheath 4 is provided with a first connector 2 and a second connector 3; the axial direction of the first connecting piece 2 and/or the second connecting piece 3 is provided with an inner cavity for accommodating the sheath tube 4; the first connector 2 is detachably connected (e.g. screwed, snap-fit, etc.) to the second connector 3. By arranging the first connecting piece 2 and the second connecting piece 3, the left ventricular assist device pump catheter can connect the first connecting piece 2 with the second connecting piece 3 after reaching a proper position, fix the length of the sheath tube 4 entering the body, reduce or avoid the sliding of the sheath tube 4 positioned in the body in the operation process, and have adverse effect on the operation.
In the preferred embodiment of the utility model, the inner diameter of the first connecting piece 2 is matched with the outer diameter of the sheath tube 4 (the sliding of the first connecting piece 2 on the sheath tube 4 is realized), and the inner diameter of the second connecting piece 3 is larger than the outer diameter of the sheath tube 4; in the connection state of the first connecting piece 2 and the second connecting piece 3, the first connecting piece 2 is in interference fit with the sheath tube 4, and the second connecting piece 3 is in interference fit with the first connecting piece 2. The arrangement ensures that before the left ventricular assist device pumps the blood conduit to enter the proper position of the human body, the length of the sheath tube 4 entering the human body can be conveniently adjusted by adjusting the position of the first connecting piece 2 and/or the second connecting piece 3; when the left ventricular assist device pump catheter of the utility model enters a proper position of a human body, the first connecting piece 2 is connected with the second connecting piece 3, and the sheath 4 is also in a locking state because the first connecting piece 2 and the second connecting piece 3 are in interference fit (the first connecting piece 2 and the second connecting piece 3 cannot slide relatively under the condition of no proper external force) and the first connecting piece 2 and the sheath 4 are in interference fit (the first connecting piece 2 and the sheath 4 cannot slide relatively under the condition of no proper external force), so that adverse effects on operation caused by sliding of the sheath 4 are avoided.
Preferably, at least part of the first connecting member 2 is made of an elastic material. By making the distal end of the first connector 2 of an elastic material, it is facilitated to achieve an interference fit of the first connector 2 and the second connector 3, and an interference fit of the first connector 2 and the sheath 4, when the first connector 2 and the second connector 3 are connected. Wherein "at least part of the first connecting member 2" means that part or all of the first connecting member 2 is made of an elastic material in a proximal to distal direction.
The utility model also provides a left ventricle auxiliary device, which comprises a computer and the pumping catheter; the computer is connected with the pressure sensor of the blood pumping catheter through a signal wire.
Preferably, the left ventricular assist device of the present utility model further comprises a mobile cart to help improve convenience of use.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The left ventricular assist device pumping catheter is characterized by comprising a sheath tube, a transvalve bent tube and a pigtail tube which are sequentially connected from a proximal end to a distal end;
the transvalve bent pipe is a multilayer pipe and is provided with an innermost layer, a middle layer and an outermost layer, wherein the innermost layer and the middle layer are arranged at intervals, and a signal transmission channel is formed at intervals between the innermost layer and the middle layer;
the valve-crossing bent pipe is characterized in that a signal line is arranged in the signal transmission channel, a pressure sensor is arranged on the inner wall of the valve-crossing bent pipe and connected with a computer of the left ventricle auxiliary device through the signal line, and the pressure sensor is used for detecting blood flow in the valve-crossing bent pipe.
2. The left ventricular assist device pump catheter of claim 1, wherein the pressure sensor comprises a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor being connected to the same signal line;
the first pressure sensor is arranged at a position on the valve-crossing elbow close to the pigtail pipe, and the second pressure sensor is arranged at a position on the valve-crossing elbow close to the sheath pipe.
3. The left ventricular assist device pumping catheter of claim 1, wherein the innermost layer of the transvalve elbow is a TPU tube, the middle layer is a spring tube, and the outermost layer is a TPU tube.
4. The left ventricular assist device pump catheter of claim 1, wherein the transvalve elbow comprises a blood outflow tube, a blood inflow tube, and a connecting tube;
one end of the blood outflow tube is connected with the sheath tube, and the other end of the blood outflow tube is connected with the connecting tube;
one end of the blood inflow pipe is connected with the connecting pipe, and the other end of the blood inflow pipe is connected with the pigtail pipe;
the connecting pipe is an arc-shaped bent pipe.
5. The left ventricular assist device pumping catheter of claim 4 wherein the blood outflow tube has a fluid outlet and the blood inflow tube has a fluid inlet.
6. The left ventricular assist device pump catheter of claim 1, further comprising a handle, the sheath being coupled to the handle.
7. The left ventricular assist device pump catheter of claim 6, wherein the proximal end of the sheath is provided with a first connector and a second connector;
the first connecting piece and/or the second connecting piece are/is provided with an inner cavity for accommodating the sheath tube in the axial direction;
the first connecting piece is detachably connected with the second connecting piece.
8. A left ventricular assist device comprising a computer and a pump catheter according to any one of claims 1-7;
the computer is connected with the pressure sensor of the pumping catheter through a signal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321557759.0U CN220025882U (en) | 2023-06-19 | 2023-06-19 | Left ventricle auxiliary device pump blood pipe and left ventricle auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321557759.0U CN220025882U (en) | 2023-06-19 | 2023-06-19 | Left ventricle auxiliary device pump blood pipe and left ventricle auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220025882U true CN220025882U (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321557759.0U Active CN220025882U (en) | 2023-06-19 | 2023-06-19 | Left ventricle auxiliary device pump blood pipe and left ventricle auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220025882U (en) |
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2023
- 2023-06-19 CN CN202321557759.0U patent/CN220025882U/en active Active
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