CN115581486A - Heart shunt and left atrium pressure monitoring system - Google Patents
Heart shunt and left atrium pressure monitoring system Download PDFInfo
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- CN115581486A CN115581486A CN202211262049.5A CN202211262049A CN115581486A CN 115581486 A CN115581486 A CN 115581486A CN 202211262049 A CN202211262049 A CN 202211262049A CN 115581486 A CN115581486 A CN 115581486A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2478—Passive devices for improving the function of the heart muscle, i.e. devices for reshaping the external surface of the heart, e.g. bags, strips or bands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2478—Passive devices for improving the function of the heart muscle, i.e. devices for reshaping the external surface of the heart, e.g. bags, strips or bands
- A61F2002/249—Device completely embedded in the heart wall
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- Health & Medical Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
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- Oral & Maxillofacial Surgery (AREA)
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The application relates to a heart shunt and a left atrium pressure monitoring system, wherein the heart shunt comprises a support and a pressure detection device, the support comprises a support body and a support fixing part, the support body is provided with a channel for redistributing atrial blood flow, and the support fixing part is arranged at two ends of the channel of the support body; in the pressure detection device, components in an electric energy receiving circuit and a signal sending circuit are arranged on a flexible circuit board, and the flexible circuit board is fixed on a support fixing part and a support body of a support; the pressure sensor is respectively connected with the electric energy receiving circuit and the signal sending circuit and is arranged at one end of the channel of the bracket. The left atrial pressure monitoring system comprises a transceiver and the cardiac shunt. According to the heart shunt, the pressure sensor is arranged on the heart shunt, the electric energy receiving circuit and the signal sending circuit are arranged to achieve a passive and wireless working mode, and the purpose of integrating treatment and monitoring is achieved.
Description
Technical Field
The application relates to the technical field of medical devices, in particular to a heart shunt and left atrium pressure monitoring system.
Background
Heart failure, abbreviated as heart failure, is a disease in which the systolic function or diastolic function of the heart is impaired, and the heart cannot fully discharge venous return blood, resulting in blood stasis in the venous system and insufficient perfusion of sufficient blood in the arterial system. Atrioventricular shunt is a new means of treating heart failure. Meanwhile, because heart failure is a chronic disease, monitoring, management and early warning of the heart failure are particularly important, and for the heart failure, left Atrial Pressure (LAP) is an important index for evaluating the cardiac function, has sensitivity and specificity, is early in prediction time and is high in accuracy.
However, in the prior art, the heart failure treatment and the monitoring of the left atrial pressure are independent and separated from each other, so that the problem that the monitoring cannot be carried out in time after the treatment exists.
Disclosure of Invention
In order to solve the technical problems, the application provides a heart shunt and a left atrial pressure monitoring system, wherein a pressure sensor is arranged on the heart shunt, and an electric energy receiving circuit and a signal sending circuit are arranged to realize a passive and wireless working mode, so that the purpose of integration of treatment and monitoring is achieved.
In order to solve the technical problem, the present application provides a cardiac shunt, which includes a bracket and a pressure detection device, where the pressure detection device includes a flexible circuit board, an electric energy receiving circuit, a signal sending circuit, and a pressure sensor;
the stent includes a stent body having a passage for redistributing atrial blood flow and stent fixing portions provided at both ends of the passage of the stent body;
the components in the electric energy receiving circuit and the signal sending circuit are arranged on the flexible circuit board, and the flexible circuit board is fixed on the bracket fixing part and the bracket body;
the pressure sensor is respectively connected with the electric energy receiving circuit and the signal sending circuit and is arranged at one end of the channel of the bracket.
Optionally, the flexible circuit board includes a first portion, a second portion and a third portion, the second portion and the third portion are arranged at a distance on the same side of the first portion; the first part is fixed on the outer wall of one end of the bracket body, the second part is fixed on the bracket fixing part, and the third part extends to one end of the channel of the bracket; the components in the electric energy receiving circuit and the signal sending circuit are arranged in the first part and the second part, and the pressure sensor is arranged in the third part.
Optionally, the bracket fixing portion includes a plurality of extension arms disposed along the circumferential direction of the channel at intervals, the extension arms at both ends of the channel are symmetrically disposed and extend in opposite directions, the second portion of the flexible circuit board is fixed to one side of the extension arm facing the outer wall of the bracket body, and the third portion of the flexible circuit board extends from the gap between the adjacent extension arms to one end of the channel of the bracket.
Optionally, the number of the second portions is two, the support fixing portions disposed at the two ends of the support body respectively include six extension arms, and the two second portions are respectively fixed to the two extension arms at the same end of the support body.
Optionally, the first portion is secured around the circumference of the stent body.
Optionally, the electric energy receiving circuit includes a first coupling coil and a power circuit, the first coupling coil is used for receiving external electric energy, an input end of the power circuit is connected with the first coupling coil, and an output end of the power circuit is respectively connected with the signal sending circuit and the pressure sensor.
Optionally, the signal sending circuit includes a microcontroller, a load modulation circuit and a second coupling coil, the microcontroller is connected to the load modulation circuit and the pressure sensor, the input end of the load modulation circuit is connected to the microcontroller, the output end of the load modulation circuit is connected to the second coupling coil, and the second coupling coil is used to send the detection signal of the pressure sensor.
Optionally, the first coupling coil and the second coupling coil are the same coil.
Optionally, first coupling coil with second coupling coil all includes magnetic sheet and coil, the coil sets up the support in the passageway, and follow the inner wall axial spiral of passageway extends, the magnetic sheet is cylindricly and fixes the inboard of coil, the both ends of coil with pin on the flexible circuit board is connected.
The application also provides a left atrial pressure monitoring system, which comprises a transceiver and the cardiac shunt, wherein the transceiver is wirelessly connected with the pressure detection device of the cardiac shunt, and the transceiver is used for providing electric energy for the electric energy receiving circuit of the pressure detection device and receiving a pressure detection signal sent by the signal sending circuit of the pressure detection device.
The heart shunt and the left atrium pressure monitoring system comprise a support and a pressure detection device, wherein the support comprises a support body and a support fixing part, the support body is provided with a channel for redistributing atrial blood flow, and the support fixing part is arranged at two ends of the channel of the support body; in the pressure detection device, components in the electric energy receiving circuit and the signal sending circuit are arranged on a flexible circuit board, and the flexible circuit board is fixed on a bracket fixing part and a bracket body of a bracket; the pressure sensor is respectively connected with the electric energy receiving circuit and the signal sending circuit and is arranged at one end of the channel of the bracket. The left atrial pressure monitoring system comprises a transceiver and the cardiac shunt. According to the heart shunt, the pressure sensor is arranged on the heart shunt, the electric energy receiving circuit and the signal sending circuit are arranged to achieve a passive and wireless working mode, and the purpose of integrating treatment and monitoring is achieved.
Drawings
FIG. 1 is one of the overall structural schematics of a cardiac shunt shown in accordance with a first embodiment;
FIG. 2 is a second schematic diagram of the overall configuration of the cardiac shunt according to the first embodiment;
FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 5 is a schematic view showing an unfolded state of the flexible circuit board according to the first embodiment;
fig. 6 is a sectional view of the flexible circuit board shown according to the first embodiment;
fig. 7 is a schematic diagram of a circuit configuration of a cardiac shunt according to a first embodiment;
fig. 8 is a schematic configuration diagram of a pressure detection system shown in accordance with a second embodiment.
Detailed Description
The following description of the embodiments of the present application is provided for illustrative purposes, and other advantages and capabilities of the present application will become apparent to those skilled in the art from the present disclosure.
In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "a, B or C" or "a, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
First embodiment
Referring to fig. 1 to 4, a cardiac shunt according to the present invention includes a frame 10 and a pressure detection device, the pressure detection device includes a flexible circuit board 20, an electric energy receiving circuit, a signal transmitting circuit, and a pressure sensor 28. The stent 10 includes a stent body 11 and stent fixing portions 12, the stent body 11 having a passage 111 for redistributing the blood flow of the atrium, the stent fixing portions 12 being provided at both ends of the passage 111 of the stent body 11. The flexible circuit board 20 is fixed on the bracket fixing part 12 and the bracket body 11, and the components in the electric energy receiving circuit and the signal transmitting circuit are arranged on the flexible circuit board 20. The pressure sensor 28 is disposed at one end of the channel 111 of the bracket 10, and the pressure sensor 28 is connected to the electric energy receiving circuit and the signal transmitting circuit, respectively.
In the above structure, the flexible circuit board 20 is used to arrange the circuit components of the pressure detection device on the support 10, so as to achieve the purpose of integrating treatment and monitoring. Meanwhile, the flexible electronic is integrated by the flexible circuit board 20, so that components can be better integrated on the bracket 10, and the requirement of miniaturization of the components is met. The passive and wireless working mode is realized by arranging the electric energy receiving circuit and the signal transmitting circuit, the requirement of long-term operation can be met, and the wound and the cost caused by replacing devices are reduced.
Referring to fig. 1 and 3, the stent 10 is a main structure of a cardiac shunt, and can provide sufficient mechanical strength to support a puncture hole at an interatrial position of a patient, the stent fixing portion 12 and the stent body 11 are integrated, the inner wall of the stent body 11 defines a channel 111 for redistributing atrial blood flow so as to form shunting of left and right atria, and reduce pressure of the left atrium or prevent pressure increase of the left atrium, and the stent fixing portion 12 is used for positioning the stent 10 in the puncture hole at the interatrial position to ensure positional stability of the stent 10.
Optionally, the bracket fixing portion 12 includes a plurality of extension arms disposed at intervals along the circumferential direction of the channel 111, and the extension arms located at two ends of the channel 111 are symmetrically disposed and extend in opposite directions, so as to achieve a better fixing effect. In the embodiment, the bracket fixing portions 12 disposed at two ends of the bracket body 11 each include six extension arms, and it can be understood that the number and arrangement of the extension arms can be adjusted according to the size of the bracket 10, which is not limited thereto.
The flexible printed circuit board 20 can use PI (polyimide) material as a base material, and has the characteristics of high wiring density, light weight, thin thickness, and good bending property. As shown in fig. 5, the flexible circuit board 20 is schematically illustrated in an unfolded state. The flexible circuit board 20 comprises a first portion 21, a second portion 22 and a third portion 23, the second portion 22 and the third portion 23 are arranged on the same side of the first portion 21 at intervals, when the first portion 21 is wound, the second portion 22 and the third portion 23 can be distributed at different positions in the circumferential direction, so that the flexible circuit board can be better adapted to the structural form of the bracket 10, and components can be more conveniently arranged on the flexible circuit board 20. When the flexible circuit board 20 is mounted, as shown in fig. 1 to 4, the first portion 21 of the flexible circuit board 20 is fixed to the outer wall of one end of the bracket body 11, preferably around the bracket body 11 for better stability; the second portion 22 of the flexible circuit board 20 is fixed to the holder fixing part 12, preferably, to a side of the extension arm facing the outer wall of the holder body 11, so that the flexible circuit board 20 can be designed in a smaller size; the third portion 23 extends to an end of the channel 111 of the stent 10, preferably from the gap between adjacent extending arms to an end of the channel 111 of the stent 10, for mounting the pressure sensor 28, at which position the pressure sensor 28 can more accurately detect left atrial pressure while avoiding or reducing the effects of endothelialization at the puncture ostium and extending the sensor's useful life. Optionally, the pressure sensor includes a bare chip and a flexible package layer, the bare chip is fixed on the first portion of the flexible circuit board and electrically connected to the pins on the flexible circuit board through the leads, and the flexible package layer can cover the bare chip in a dispensing manner, so as to meet the requirement of water resistance.
In the present embodiment, the components in the electric energy receiving circuit and the signal transmitting circuit are provided in the first portion 21 and the second portion 22. Optionally, the second portion 22 is used for arranging main components in the electric energy receiving circuit and the signal transmitting circuit, such as capacitors, resistors, chips, and the like, and the first portion 21 is mainly used for routing to have better flexibility. The number of the second portions 22 can be selected according to the number and size of the components, please refer to fig. 2, fig. 4 and fig. 5, in this embodiment, there are two second portions 22, the two second portions 22 are respectively fixed on two extension arms at the same end of the bracket body 11, and preferably, the extension arms provided with the second portions 22 are symmetrical to each other in position.
Referring to fig. 6, the package structure of the flexible circuit board 20 includes a first insulating layer 201, a bio-compatible layer 202, a device layer 203, a flexible substrate 204 and a second insulating layer 205, which are sequentially stacked. The first insulating layer 201 and the second insulating layer 205 are used to ensure insulating property of the circuit, and the material used may be silica gel, polyimide, or the like, preferably silica gel. The component layer 203 is used for arranging circuit components and circuit traces.
Fig. 7 is a schematic circuit diagram of the present embodiment. The electric energy receiving circuit and the signal transmitting circuit use the same coupling coil 24, wherein the electric energy receiving circuit comprises the coupling coil 24 and a power circuit 25, the signal transmitting circuit comprises a microcontroller 27, a load modulation circuit 26 and the coupling coil 24, the coupling coil 24 is used for receiving external electric energy and transmitting a detection signal of a pressure sensor 28, the input end of the power circuit 25 is connected with the coupling coil 24, the output end of the power circuit 25 is respectively connected with the microcontroller 27 and the pressure sensor 28, the microcontroller 27 is respectively connected with the load modulation circuit 26 and the pressure sensor 28, the input end of the load modulation circuit 26 is connected with the microcontroller 27, and the output end of the load modulation circuit 26 is connected with the coupling coil 24. In practical implementation, the two coupling coils 24 may be a first coupling coil and a second coupling coil, respectively, wherein the first coupling coil is used in the electric energy receiving circuit to receive external electric energy, and the second coupling coil is used in the signal transmitting circuit to transmit the detection signal of the pressure sensor 28.
Specifically, the external electric energy may be coupled to the coupling coil 24 in the pressure detecting device in the form of high-frequency electromagnetic energy, and the power circuit 25 is used for rectifying and stabilizing the received high-frequency electric energy and converting the rectified and stabilized electric energy into an operating voltage adapted by the microcontroller 27 and the pressure sensor 28. The Micro Controller Unit (MCU) may be used as the micro controller Unit (micro controller Unit) 27, which has a low power consumption, so that the power consumption of the circuit of the pressure detection device can be reduced, thereby obtaining a long electric energy and data transmission distance.
The detection signal of the pressure detection device is transmitted to an external device through the coupling coil 24 by means of load impedance modulation. Specifically, the microcontroller 27 controls the load modulation circuit 26 to change the voltage across the coupling coil 24 according to the detection data of the pressure sensor 28, based on the inductive coupling between the coupling coil 24 and the coil in the external device, the change in the voltage across the coupling coil 24 will cause the amplitude of the voltage across the coil in the external device to change, and the change in the voltage amplitude of the coil in the external device can use the principle of envelope detection to demodulate the low-frequency signal, and further perform data shaping to read the detection data and realize the transmission of the detection signal.
In this way, the coupling coil 24 provides a working power supply for the pressure detection device, and the pressure detection data is synchronously transmitted to the external device.
Referring to fig. 3 and 4, the coupling coil 24 includes a magnetic sheet 242 and a coil 241, the coil 241 is disposed in the channel 111 of the bracket 10 and extends spirally along the inner wall of the channel 111, the magnetic sheet 242 is cylindrical and fixed inside the coil 241 to ensure the smoothness of the channel 111 in the bracket 10, and two ends of the coil 241 are connected to the leads on the flexible circuit board 20. Preferably, the magnetic sheet 242 is made of ferrite material, which has the advantages of high magnetic permeability and strong signal gathering capability, and is helpful for receiving more electromagnetic energy.
The heart shunt comprises a support and a pressure detection device, wherein the support comprises a support body and a support fixing part, the support body is provided with a channel for redistributing atrial blood flow, and the support fixing part is arranged at two ends of the channel of the support body; in the pressure detection device, components in an electric energy receiving circuit and a signal sending circuit are arranged on a flexible circuit board, and the flexible circuit board is fixed on a support fixing part and a support body of a support; the pressure sensor is respectively connected with the electric energy receiving circuit and the signal sending circuit and is arranged at one end of the channel of the bracket. According to the heart shunt, the pressure sensor is arranged on the heart shunt, and the electric energy receiving circuit and the signal sending circuit are arranged to achieve a passive wireless working mode, so that the purpose of integration of treatment and monitoring is achieved.
Second embodiment
The application also provides a left atrial pressure monitoring system, which comprises a transceiver and the cardiac shunt according to the first embodiment, wherein the transceiver is wirelessly connected with the pressure detection device of the cardiac shunt, and the transceiver is used for providing electric energy for the electric energy receiving circuit of the pressure detection device and receiving the pressure detection signal sent by the signal sending circuit of the pressure detection device.
As shown in fig. 8, the connection of the circuit portions is mainly illustrated. The electric energy receiving circuit of the pressure detection device comprises a coupling coil 24 and a power circuit 25, the signal transmitting circuit comprises a microcontroller 27, a load modulation circuit 26 and the coupling coil 24, the coupling coil 24 is used for receiving external electric energy and transmitting a detection signal of a pressure sensor 28, the input end of the power circuit 25 is connected with the coupling coil 24, the output end of the power circuit 25 is respectively connected with the microcontroller 27 and the pressure sensor 28, the microcontroller 27 is respectively connected with the load modulation circuit 26 and the pressure sensor 28, the input end of the load modulation circuit 26 is connected with the microcontroller 27, and the output end of the load modulation circuit 26 is connected with the coupling coil 24. In practical implementation, the two coupling coils 24 may be a first coupling coil and a second coupling coil, wherein the first coupling coil is used in the electric energy receiving circuit to receive external electric energy, and the second coupling coil is used in the signal transmitting circuit to transmit the detection signal of the pressure sensor 28. The operation and structure of the pressure detecting device are the same as those of the first embodiment, and are not described again.
The transceiver comprises a high-frequency oscillator 31, a high-frequency amplifier 32, a parallel resonant coil 33, an amplifying and detecting circuit 34, a shaping circuit 35, an external microcontroller 36 and a transmission circuit 37 which are connected in sequence, wherein a frequency source of the high-frequency oscillator 31 is processed by the high-frequency amplifier 32 and then is coupled to the coupling coil 24 of the pressure detection device through the parallel resonant coil 33, so that the electric energy is transmitted.
The detection signal of the pressure detection device is transmitted to the parallel resonance coil 33 through the inductive coupling effect of the coupling coil 24 and the parallel resonance coil 33, the demodulation of the low-frequency signal is realized through the amplifying and detecting circuit 34, the detection data is further read through the Schmitt shaping performed by the shaping circuit 35, and then the detection data is transmitted to the transmission circuit 37 through the external microcontroller 36, and is transmitted to the corresponding component through the transmission circuit 37, for example, the detection data is transmitted to a display for displaying. The external Microcontroller 36 may be a Micro Controller Unit (MCU), which has low power consumption and can obtain long electric energy and data transmission distance. The transceiver may be provided on a shoulder strap or a chest strap for portability.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present disclosure be covered by the claims of the present application.
Claims (10)
1. A heart shunt is characterized by comprising a support and a pressure detection device, wherein the pressure detection device comprises a flexible circuit board, an electric energy receiving circuit, a signal sending circuit and a pressure sensor;
the stent includes a stent body having a channel for redistributing atrial blood flow and stent fixing portions provided at both ends of the channel of the stent body;
the electric energy receiving circuit and the components in the signal sending circuit are arranged on the flexible circuit board, and the flexible circuit board is fixed on the bracket fixing part and the bracket body;
the pressure sensor is respectively connected with the electric energy receiving circuit and the signal sending circuit and is arranged at one end of the channel of the bracket.
2. The cardiac shunt of claim 1, wherein said flexible circuit board comprises a first portion, a second portion and a third portion, said second portion and said third portion being spaced apart on a same side of said first portion; the first part is fixed on the outer wall of one end of the bracket body, the second part is fixed on the bracket fixing part, and the third part extends to one end of the channel of the bracket; the components in the electric energy receiving circuit and the signal sending circuit are arranged in the first part and the second part, and the pressure sensor is arranged in the third part.
3. The cardiac shunt of claim 2, wherein said first portion is secured around said stent body.
4. The cardiac shunt according to claim 2, wherein the stent fixing portion comprises a plurality of extension arms spaced apart from each other along a circumferential direction of the channel, the extension arms at both ends of the channel are symmetrically disposed and extend toward each other, the second portion of the flexible circuit board is fixed to a side of the extension arms facing the outer wall of the stent body, and the third portion of the flexible circuit board extends from a gap between adjacent ones of the extension arms to one end of the channel of the stent.
5. The cardiac shunt according to claim 4, wherein the number of the second portions is two, the stent fixing portions provided at both ends of the stent body each include six of the extension arms, and the two second portions are fixed to two of the extension arms at the same end of the stent body, respectively.
6. The cardiac shunt according to any one of claims 1 to 5, wherein the electrical energy receiving circuit comprises a first coupling coil for receiving external electrical energy and a power circuit, an input terminal of the power circuit being connected to the first coupling coil, and an output terminal of the power circuit being connected to the signal transmitting circuit and the pressure sensor, respectively.
7. The cardiac shunt according to claim 6, wherein the signal transmitting circuit comprises a microcontroller, a load modulation circuit and a second coupling coil, the microcontroller is connected with the load modulation circuit and the pressure sensor respectively, an input end of the load modulation circuit is connected with the microcontroller, an output end of the load modulation circuit is connected with the second coupling coil, and the second coupling coil is used for transmitting a detection signal of the pressure sensor.
8. The cardiac shunt of claim 7, wherein the first coupling coil and the second coupling coil are the same coil.
9. The cardiac shunt according to claim 7, wherein the first and second coupling coils each comprise a magnetic sheet and a coil, the coil is disposed in the channel of the support and extends spirally along an inner wall of the channel in an axial direction, the magnetic sheet is cylindrical and fixed on an inner side of the coil, and two ends of the coil are connected to the pins on the flexible circuit board.
10. A left atrial pressure monitoring system comprising a transceiver device and a cardiac shunt according to any one of claims 1 to 9, the transceiver device being wirelessly connected to a pressure sensing device of the cardiac shunt, the transceiver device being adapted to provide electrical energy to an electrical energy receiving circuit of the pressure sensing device and to receive a pressure sensing signal from a signal transmitting circuit of the pressure sensing device.
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| US20110278948A1 (en) * | 2008-11-21 | 2011-11-17 | Milux Holdings SA | System for supplying energy |
| CN102858280A (en) * | 2010-04-23 | 2013-01-02 | 美敦力瓦斯科尔勒公司 | Biodegradable stent having non-biodegradable end portions and mechanism for increased stent hoop strength |
| CN105193529A (en) * | 2015-10-20 | 2015-12-30 | 清华大学深圳研究生院 | In vivo wireless sensing system based on cardiovascular stent |
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