Impeller deformation detection method and device for ventricular catheter pump
By setting up a capacitance detection component between the impeller and the pump housing of the ventricular catheter pump, obtaining the capacitance change value and initial spacing, and accurately detecting the radial deformation of the impeller, the problem that impeller deformation affects the pump performance is solved, and the reliability and operating performance of the pump are improved.
Patent Information
- Application Number
- CN202510101451.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-05-06
AI Technical Summary
The ventricular catheter pump with foldable impeller is prone to radial deformation during operation, affecting the performance and reliability of the pump, and it is difficult for the prior art to accurately detect impeller deformation.
By providing a capacitance detection assembly between the impeller and the pump housing, the capacitance change value and initial spacing are obtained, and the radial deformation information of the impeller is estimated based on these data.
It realizes accurate detection of the radial deformation of the ventricular catheter pump impeller, improves the operating performance and reliability of the pump, promptly detects equipment abnormalities, and provides alarm or protection.
Smart Images
Figure CN119934954A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of artificial heart technology, and in particular to a method and device for detecting impeller deformation of a ventricular catheter pump. Background Art
[0002] A ventricular catheter pump is a micro axial flow pump within a blood vessel that supports the patient's blood circulation system. A ventricular catheter pump with a foldable impeller can better meet the requirements of small size and large flow rate. However, the radial deformation of the foldable impeller affects the operating performance of the ventricular catheter pump. Therefore, a ventricular catheter pump impeller deformation detection solution is urgently needed. Summary of the invention
[0003] The purpose of the embodiment of the present application is to provide a method and device for detecting the deformation of the impeller of a ventricular catheter pump, so as to accurately detect the deformation of the impeller of the ventricular catheter pump. The specific technical solution is as follows: In a first aspect, an embodiment of the present application provides a method for detecting deformation of an impeller of a ventricular catheter pump, which is applied to an electronic medical device in a ventricular catheter pump system, wherein the ventricular catheter pump system further includes a ventricular catheter pump, wherein a pump head in the ventricular catheter pump includes a foldable impeller and a self-expanding pump casing, and the impeller is disposed in the pump casing; the method includes: Obtaining a capacitance change value between the impeller and the pump housing collected by a capacitance detection component, and obtaining an initial spacing between the impeller and the pump housing in a stationary state, wherein the capacitance detection component is disposed between the impeller and the pump housing; A target deformation value representing radial deformation information of the impeller is estimated based on the capacitance change value and the initial spacing.
[0004] In one embodiment of the present application, the method of estimating a target deformation value representing radial deformation information of the impeller based on the capacitance change value and the initial spacing includes: Determining a total deformation value representing a geometric deformation of the impeller based on the capacitance change value and the initial spacing; Based on the total deformation value, a target deformation value representing radial deformation information of the impeller is determined.
[0005] In one embodiment of the present application, the overall deformation value characterizing the overall geometric deformation of the impeller is determined based on the capacitance change value and the initial spacing, including: The overall deformation value is calculated according to the following expression: ; Where D is the overall deformation value, is the dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0006] In one embodiment of the present application, before determining the overall deformation value representing the overall deformation information of the impeller based on the sensitivity coefficient and the capacitance change value, the method further includes: Obtaining a temperature change value representing current temperature change information of blood; Calculating a deviation value of a dielectric constant based on the temperature change value, and adjusting the dielectric constant according to the deviation value to obtain a target dielectric constant; The determining, based on the sensitivity coefficient and the capacitance change value, an overall deformation value representing overall deformation information of the impeller comprises: The overall deformation value is calculated according to the following expression: ; Where D is the overall deformation value, is the target dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0007] In a second aspect, an embodiment of the present application provides an impeller deformation detection device for a ventricular catheter pump, which is applied to an electronic medical device in a ventricular catheter pump system, wherein the ventricular catheter pump system further includes a ventricular catheter pump, wherein a pump head in the ventricular catheter pump includes a foldable impeller and a self-expanding pump casing, and the impeller is disposed in the pump casing; the device includes: A data acquisition module, used to acquire the capacitance change value between the impeller and the pump housing collected by the capacitance detection component, and to acquire the initial distance between the impeller and the pump housing in a static state, wherein the capacitance detection component is arranged between the impeller and the pump housing; The deformation detection module is used to estimate a target deformation value representing radial deformation information of the impeller based on the capacitance change value and the initial spacing.
[0008] In one embodiment of the present application, the deformation detection module includes: A first deformation detection submodule, configured to determine a total deformation value representing a geometric deformation of the impeller based on the capacitance change value and an initial spacing; The second deformation detection submodule is used to determine a target deformation value representing radial deformation information of the impeller based on the total deformation value.
[0009] In one embodiment of the present application, the first deformation detection submodule is specifically used to calculate the overall deformation value according to the following expression: ; Where D is the overall deformation value, is the dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0010] In one embodiment of the present application, the deformation detection module further includes: The data adjustment submodule is specifically used to obtain a temperature change value representing the current temperature change information of the blood; based on the temperature change value, calculate a deviation value of the dielectric constant, adjust the dielectric constant according to the deviation value, and obtain a target dielectric constant; The first deformation detection submodule is specifically used to calculate the overall deformation value according to the following expression: ; Where D is the overall deformation value, is the target dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0011] In a third aspect, an embodiment of the present application provides an electronic medical device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; Memory, used to store computer programs; The processor is used to implement the method steps described in the first aspect when executing the program stored in the memory.
[0012] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method steps described in the first aspect are implemented.
[0013] From the above, it can be seen that by applying the solution provided in the embodiment of the present application, the radial deformation of the impeller is detected based on the accurate capacitance change value and the initial spacing collected by the capacitance detection component. Since the capacitance change value represents the capacitance change information between the impeller and the pump casing, and the initial spacing represents the spacing between the impeller and the pump casing in a static state, and since the capacitance change information can reflect the spacing between the impeller and the pump casing in a dynamic state, therefore, based on the capacitance change value and the initial spacing, the deformation information of the impeller in the dynamic state can be accurately determined, thereby realizing accurate detection of the radial deformation of the impeller.
[0014] Of course, implementing any product or method of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can also be obtained based on these drawings.
[0016] Figure 1a A schematic structural diagram of a ventricular catheter pump system provided in an embodiment of the present application; Figure 2 A schematic flow chart of a first method for detecting deformation of an impeller of a ventricular catheter pump provided in an embodiment of the present application; Figure 3 A schematic flow chart of a second method for detecting deformation of an impeller of a ventricular catheter pump provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a first ventricular catheter pump impeller deformation detection device provided in an embodiment of the present application; Figure 5 A schematic structural diagram of a second ventricular catheter pump impeller deformation detection device provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of an electronic medical device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.
[0018] Before introducing the embodiments of the present application, first, the ventricular catheter pump system provided by the present application is described.
[0019] See also Figure 1a , Figure 1a The schematic diagram of the structure of the ventricular catheter pump system is shown. The system comprises a ventricular catheter pump 11 and an electronic medical device 12 . The electronic medical device 12 is connected to the ventricular catheter pump 11 .
[0020] The electronic medical device 12 is used to detect the deformation of the impeller in the ventricular catheter pump 11. At the same time, it is also used to detect the patient's physiological parameters and pump operating parameters, control the real-time operation of the pump, and provide a user interface for information exchange with medical staff.
[0021] The ventricular catheter pump provided in the embodiment of the present application mainly includes a motor, a foldable impeller, a self-expanding pump housing, a blood inlet, and a bleeding port, wherein the foldable impeller is arranged in the self-expanding pump housing, and the motor drives the impeller to rotate at a high speed to pump cardiac blood into the patient's pulmonary artery / aorta through the blood inlet and the bleeding port, thereby realizing the heart-assisted blood pumping function.
[0022] The ventricular catheter pump of the present application may be a left ventricular catheter pump, a right ventricular catheter pump, a biventricular catheter pump, etc., without limitation thereto.
[0023] In the embodiment of the present application, the foldable impeller is at risk of radial deformation, which affects the gap between the impeller and the pump casing. The gap is very important for the blood flow, efficiency and blood shear force of the ventricular catheter pump. Excessive radial deformation may cause contact or friction between the impeller and the pump casing, increasing the risk of heat accumulation and mechanical damage, and may even cause pump failure.
[0024] The radial deformation parameter can be used as an important parameter for impeller fatigue analysis and material life prediction, helping to evaluate the reliability of equipment in long-term use. In actual operation, real-time monitoring of the radial deformation of the impeller can be used to diagnose equipment abnormalities such as blockage, foreign matter intrusion, etc., and provide timely alarms or protection.
[0025] The executor of the embodiment of the present application is the above-mentioned electronic medical device.
[0026] The following describes the solution provided in the embodiments of the present application.
[0027] See also Figure 2 , Figure 2 This is a schematic flow chart of a first method for detecting deformation of an impeller of a ventricular catheter pump provided in an embodiment of the present application. The method includes the following steps S201-S202.
[0028] Step S201: obtaining the capacitance change value between the impeller and the pump casing collected by the capacitance detection component, and obtaining the initial distance between the impeller and the pump casing in a static state.
[0029] The capacitance detection component is arranged between the impeller and the pump housing, and is used to detect the capacitance change between the impeller and the pump housing. The capacitance detection component is a device designed and tested in advance under a simulated test environment for accurately measuring capacitance values.
[0030] Specifically, the capacitance detection component may include two capacitance detection plates, one capacitance detection plate is fixed to the inner surface of the pump casing opposite to the impeller, and the other capacitance detection plate is fixed to the outer surface of the impeller opposite to the pump casing. The capacitance change between the impeller and the pump casing can be detected through the two capacitance detection plates.
[0031] The above capacitance change value indicates the capacitance change between the impeller and the pump casing. The difference between the capacitance values at adjacent collection moments can be calculated as the capacitance change value.
[0032] The initial distance refers to the distance between the impeller and the pump casing in a stationary state, and the initial distance is preset.
[0033] Step S202: estimating a target deformation value representing radial deformation information of the impeller based on the capacitance change value and the initial spacing.
[0034] The target deformation value represents the radial deformation information of the impeller. The radial deformation refers to the twisting deformation of the impeller along the duct direction.
[0035] One implementation method of estimating the target deformation value is to determine the dynamic spacing corresponding to the capacitance change value, and calculate the difference between the dynamic spacing and the initial spacing as the target deformation value.
[0036] The above capacitance change value represents the dynamic spacing information between the impeller and the pump housing, that is, the dynamic spacing between the impeller and the pump housing during the operation of the ventricular catheter pump. Based on this, the corresponding relationship between the capacitance value and the spacing can be preset, and according to the above corresponding relationship, the spacing corresponding to the above capacitance change value can be determined as the dynamic spacing.
[0037] The target deformation value is the difference between the dynamic spacing and the initial spacing. Since the impeller is mainly in a dynamic state during the operation of the ventricular catheter pump, the difference between the dynamic spacing and the initial spacing can accurately reflect the deformation value of the impeller in the dynamic state, and radial deformation is the main deformation factor of the impeller in the dynamic state. Therefore, the target deformation value can be accurately determined by using the above gap.
[0038] Other implementations of estimating the target deformation value can be found in the following Figure 3 The corresponding embodiments are not described in detail here.
[0039] From the above, it can be seen that by applying the solution provided in this embodiment, the radial deformation of the impeller is detected based on the accurate capacitance change value and the initial spacing collected by the capacitance detection component. Since the capacitance change value represents the capacitance change information between the impeller and the pump casing, and the initial spacing represents the spacing between the impeller and the pump casing in a static state, and since the capacitance change information can reflect the spacing between the impeller and the pump casing in a dynamic state, therefore, based on the capacitance change value and the initial spacing, the deformation information of the impeller in the dynamic state can be accurately determined, thereby realizing accurate detection of the radial deformation of the impeller.
[0040] In the aforementioned Figure 2 In the corresponding embodiment, in addition to the above-mentioned method, the target deformation value can also be estimated by the following method: Figure 3Based on this, see Figure 3 , Figure 3 This is a flow chart of a second method for detecting deformation of an impeller of a ventricular catheter pump provided in an embodiment of the present application. The method includes the following steps S301-S303.
[0041] Step S301: obtaining the capacitance change value between the impeller and the pump casing collected by the capacitance detection component, and obtaining the initial distance between the impeller and the pump casing in a static state.
[0042] Wherein, the capacitance detection component is arranged between the impeller and the pump casing.
[0043] Step S302: determining an overall deformation value representing an overall geometric deformation of the impeller based on the capacitance change value and the initial spacing.
[0044] The first implementation method for determining the above-mentioned overall deformation value is: determining a linear coefficient corresponding to the initial spacing, and calculating a ratio between the capacitance change value and the linear coefficient as the overall deformation value.
[0045] The second implementation method of determining the above-mentioned overall deformation value is: determining the overall deformation value according to the following expression: ; Where D is the overall deformation value, is the dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0046] In this embodiment, the above-mentioned dielectric constant is affected by the blood environment. Based on this, in one embodiment of the present application, a temperature change value representing the current temperature change information of the blood is obtained; based on the temperature change value, the deviation value of the dielectric constant is calculated, and the dielectric constant is adjusted according to the deviation value to obtain the target dielectric constant, and the target dielectric constant is replaced by the dielectric constant in the above formula to calculate the overall deformation value.
[0047] The temperature change value may be a temperature value detected by a temperature sensor integrated in a ventricular catheter pump, and the temperature change value may be obtained by analyzing the change of a time series temperature value sequence.
[0048] An implementation method for calculating the deviation value of the dielectric constant is: calculating the product between the temperature change value and the preset coefficient, and using the calculated product as the deviation value of the dielectric constant.
[0049] One implementation method of adjusting the dielectric constant is: calculating the sum of the dielectric constant and the deviation value, and determining the calculated sum as the adjusted dielectric constant, that is, the target dielectric constant.
[0050] The formula for calculating the overall deformation value according to the target dielectric constant is as follows: ; Where D is the overall deformation value, is the target dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0051] Since the influence of blood temperature on the dielectric constant is taken into consideration, the dielectric constant is adjusted based on the blood temperature, and then the overall deformation value is calculated based on the adjusted dielectric constant, which can improve the accuracy of the calculated overall deformation value.
[0052] Step S303: Based on the total deformation value, determine a target deformation value representing radial deformation information of the impeller.
[0053] The first implementation method for determining the target deformation value is to calculate the product between the total deformation value and the preset ratio, and determine the calculated product as the target deformation value. The preset ratio is the statistical ratio data of the radial deformation to the total deformation. The preset ratio can be obtained by testing a large number of test samples under a simulated test environment, indicating the proportional relationship between the total deformation and the radial deformation. Therefore, by calculating the difference between the total deformation value and the preset error, the target deformation value can be accurately obtained.
[0054] A second implementation method for determining the target deformation value is: determining a current change value that characterizes the motor current fluctuation information of the ventricular catheter pump, calculating the current difference between the current change value and a preset standard current change value, inputting the current difference and the total deformation value into a pre-trained impeller deformation detection model, and obtaining the deformation value output by the impeller deformation detection model as the target deformation value.
[0055] The above-mentioned current change value represents the current real-time fluctuation of the motor current, and the preset standard current change value is the current change value obtained by testing under a standard blood environment.
[0056] The calculated current difference reflects the deviation value of the current real-time fluctuation compared with the standard current fluctuation.
[0057] The pre-trained impeller deformation detection model is obtained by pre-training the initial neural network model using training samples, and is used to predict the radial deformation value of the impeller. The training samples include sample current deviation and sample total deformation value, the sample current deviation is the deviation between the current fluctuation of the sample ventricular catheter pump and the standard current fluctuation, and the sample total deformation value is the deformation value that characterizes the geometric overall characteristics of the impeller in the sample ventricular catheter pump.
[0058] Since the motor current is related to the dynamic operation of the impeller of the ventricular catheter pump, the above current difference can reflect the dynamic operation state of the impeller, and the total deformation value reflects the dynamic operation state of the impeller from the measured capacitance. Based on the data of the above two dimensions, the radial deformation value of the impeller can be accurately detected by using the pre-trained impeller deformation detection.
[0059] It can be seen from the above that the total deformation value is first determined based on the capacitance change value and the initial spacing, and then the impeller radial deformation information is determined based on the total deformation value. In this way, other deformations of the impeller are taken into account, and the accuracy of impeller deformation detection is further improved by finely screening the impeller radial deformation information.
[0060] Corresponding to the above-mentioned impeller deformation method of the ventricular catheter pump, the embodiment of the present application also provides an impeller deformation device of the ventricular catheter pump.
[0061] See also Figure 4 , Figure 4 A schematic diagram of the structure of the first impeller deformation device of a ventricular catheter pump provided in an embodiment of the present application. The device is applied to an electronic medical device in a ventricular catheter pump system, wherein the ventricular catheter pump system also includes a ventricular catheter pump, wherein the pump head in the ventricular catheter pump includes a foldable impeller and a self-expanding pump housing, wherein the impeller is disposed in the pump housing; the device includes: The data acquisition module 401 is used to acquire the capacitance change value between the impeller and the pump housing collected by the capacitance detection component, and to acquire the initial distance between the impeller and the pump housing in a static state, wherein the capacitance detection component is arranged between the impeller and the pump housing; The deformation detection module 402 is used to estimate a target deformation value representing radial deformation information of the impeller based on the capacitance change value and the initial spacing.
[0062] From the above, it can be seen that by applying the solution provided in this embodiment, the radial deformation of the impeller is detected based on the accurate capacitance change value and the initial spacing collected by the capacitance detection component. Since the capacitance change value represents the capacitance change information between the impeller and the pump casing, and the initial spacing represents the spacing between the impeller and the pump casing in a static state, and since the capacitance change information can reflect the spacing between the impeller and the pump casing in a dynamic state, therefore, based on the capacitance change value and the initial spacing, the deformation information of the impeller in the dynamic state can be accurately determined, thereby realizing accurate detection of the radial deformation of the impeller.
[0063] See also Figure 5 , Figure 5 A schematic diagram of the structure of the second impeller deformation device of the ventricular catheter pump provided in the embodiment of the present application. The device comprises: The data acquisition module 501 is used to acquire the capacitance change value between the impeller and the pump housing collected by the capacitance detection component, and to acquire the initial distance between the impeller and the pump housing in a static state, wherein the capacitance detection component is arranged between the impeller and the pump housing; A first deformation detection submodule 502, configured to determine a total deformation value representing a geometric deformation of the impeller based on the capacitance change value and the initial spacing; The second deformation detection submodule 503 is used to determine a target deformation value representing radial deformation information of the impeller based on the total deformation value.
[0064] It can be seen from the above that the total deformation value is first determined based on the capacitance change value and the initial spacing, and then the impeller radial deformation information is determined based on the total deformation value. In this way, other deformations of the impeller are taken into account, and the accuracy of impeller deformation detection is further improved by finely screening the impeller radial deformation information.
[0065] In one embodiment of the present application, the first deformation detection submodule 502 is specifically configured to calculate the overall deformation value according to the following expression: ; Where D is the overall deformation value, is the dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0066] In one embodiment of the present application, the deformation detection module further includes: The data adjustment submodule is specifically used to obtain a temperature change value representing the current temperature change information of the blood; based on the temperature change value, calculate a deviation value of the dielectric constant, adjust the dielectric constant according to the deviation value, and obtain a target dielectric constant; The first deformation detection submodule 502 is specifically configured to calculate the overall deformation value according to the following expression: ; Where D is the overall deformation value, is the target dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
[0067] Since the influence of blood temperature on the dielectric constant is taken into consideration, the dielectric constant is adjusted based on the blood temperature, and then the overall deformation value is calculated based on the adjusted dielectric constant, which can improve the accuracy of the calculated overall deformation value.
[0068] Corresponding to the impeller deformation method of the ventricular catheter pump described above, the present application embodiment provides an electronic medical device, see Figure 6 , Figure 6 A schematic diagram of the structure of an electronic medical device provided in an embodiment of the present application, wherein the electronic medical device comprises a processor 601, a communication interface 602, a memory 603 and a communication bus 604, wherein the processor 601, the communication interface 602 and the memory 603 communicate with each other via the communication bus 604; Memory 603, used for storing computer programs; The processor 601 is used to implement the impeller deformation method steps of the ventricular catheter pump when executing the program stored in the memory 603.
[0069] The communication bus mentioned in the above controller can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.
[0070] The communication interface is used for communication between the above controller and other devices.
[0071] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.
[0072] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
[0073] In another embodiment provided in the present application, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed by a processor, the impeller deformation method and steps of the ventricular catheter pump provided in the embodiment of the present application are implemented.
[0074] In another embodiment provided by the present application, a computer program product including instructions is also provided. When the computer is executed, the impeller deformation method and steps of the ventricular catheter pump provided by the embodiment of the present application are implemented.
[0075] From the above, it can be seen that by applying the solution provided in this embodiment, the radial deformation of the impeller is detected based on the accurate capacitance change value and the initial spacing collected by the capacitance detection component. Since the capacitance change value represents the capacitance change information between the impeller and the pump casing, and the initial spacing represents the spacing between the impeller and the pump casing in a static state, and since the capacitance change information can reflect the spacing between the impeller and the pump casing in a dynamic state, therefore, based on the capacitance change value and the initial spacing, the deformation information of the impeller in the dynamic state can be accurately determined, thereby realizing accurate detection of the radial deformation of the impeller.
[0076] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.
[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0078] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, electronic medical equipment, and computer-readable storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.
[0079] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims
1. A method for detecting deformation of an impeller of a ventricular catheter pump, characterized in that: An electronic medical device used in a ventricular catheter pump system, wherein the ventricular catheter pump system further comprises a ventricular catheter pump, wherein a pump head in the ventricular catheter pump comprises a foldable impeller and a self-expanding pump housing, wherein the impeller is disposed in the pump housing; and the method comprises: Obtaining a capacitance change value between the impeller and the pump housing collected by a capacitance detection component, and obtaining an initial spacing between the impeller and the pump housing in a stationary state, wherein the capacitance detection component is disposed between the impeller and the pump housing; A target deformation value representing radial deformation information of the impeller is estimated based on the capacitance change value and the initial spacing.
2. The method according to claim 1, characterized in that The estimating a target deformation value representing radial deformation information of the impeller based on the capacitance change value and the initial spacing includes: Determining a total deformation value representing a geometric deformation of the impeller based on the capacitance change value and the initial spacing; Based on the total deformation value, a target deformation value representing radial deformation information of the impeller is determined.
3. The method according to claim 2, characterized in that The determining of the overall deformation value representing the overall geometric deformation of the impeller based on the capacitance change value and the initial spacing includes: The overall deformation value is calculated according to the following expression: ； Where D is the overall deformation value, is the dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
4. The method according to claim 3, characterized in that Before determining the overall deformation value representing the overall deformation information of the impeller based on the sensitivity coefficient and the capacitance change value, the method further includes: Obtaining a temperature change value representing current temperature change information of blood; Calculating a deviation value of a dielectric constant based on the temperature change value, and adjusting the dielectric constant according to the deviation value to obtain a target dielectric constant; The determining, based on the sensitivity coefficient and the capacitance change value, an overall deformation value representing overall deformation information of the impeller comprises: The overall deformation value is calculated according to the following expression: ； Where D is the overall deformation value, is the target dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
5. A device for detecting deformation of an impeller of a ventricular catheter pump, characterized in that: An electronic medical device used in a ventricular catheter pump system, wherein the ventricular catheter pump system also includes a ventricular catheter pump, wherein a pump head in the ventricular catheter pump includes a foldable impeller and a self-expanding pump housing, wherein the impeller is disposed in the pump housing; the device includes: A data acquisition module, used to acquire the capacitance change value between the impeller and the pump housing collected by the capacitance detection component, and to acquire the initial distance between the impeller and the pump housing in a static state, wherein the capacitance detection component is arranged between the impeller and the pump housing; The deformation detection module is used to estimate a target deformation value representing radial deformation information of the impeller based on the capacitance change value and the initial spacing.
6. The device according to claim 5, characterized in that The deformation detection module comprises: A first deformation detection submodule, configured to determine a total deformation value representing a geometric deformation of the impeller based on the capacitance change value and an initial spacing; The second deformation detection submodule is used to determine a target deformation value representing radial deformation information of the impeller based on the total deformation value.
7. The device according to claim 6, characterized in that The first deformation detection submodule is specifically used to calculate the overall deformation value according to the following expression: ； Where D is the overall deformation value, is the dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
8. The device according to claim 7, characterized in that The deformation detection module further includes: The data adjustment submodule is specifically used to obtain a temperature change value representing the current temperature change information of the blood; based on the temperature change value, calculate a deviation value of the dielectric constant, adjust the dielectric constant according to the deviation value, and obtain a target dielectric constant; The first deformation detection submodule is specifically used to calculate the overall deformation value according to the following expression: ； Where D is the overall deformation value, is the target dielectric constant, A is the preset parameter of the capacitance detection component, is the initial spacing, is the capacitance change value.
9. An electronic medical device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, for implementing the method steps described in any one of claims 1 to 4 when executing a program stored in a memory.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method steps of any one of claims 1 to 4 are implemented.