CN117122811B - Self-starting method applied to ventricular assist device system - Google Patents
Self-starting method applied to ventricular assist device system Download PDFInfo
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- 230000002861 ventricular Effects 0.000 title claims abstract description 25
- 239000008280 blood Substances 0.000 claims abstract description 259
- 210000004369 blood Anatomy 0.000 claims abstract description 259
- 230000002159 abnormal effect Effects 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 28
- 239000000725 suspension Substances 0.000 claims description 58
- 230000008569 process Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000036770 blood supply Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000017531 blood circulation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005339 levitation Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention provides a self-starting method applied to a ventricular assist device system, which comprises the following steps: reading the expected working state data of the blood pump stored in the nonvolatile memory after initialization, judging the validity of the read data, and correspondingly setting the identification of the expected working state data of the blood pump as normal or abnormal; different control is respectively carried out according to the marks of the expected working state data of different blood pumps; continuously comparing and judging whether expected working state data of the blood pump in a random storage area of the microprocessor is consistent with actual working state data of the blood pump; and processing is carried out until the actual working state of the blood pump completely reaches the expected state. The method has the beneficial effects that when the blood pump is stopped accidentally, the blood pump can be started immediately and automatically without the intervention of a user under the condition that the monitor is not connected, so that the blood pump is restored to the last normal running state, the stop time of the blood pump is shortened, and the adverse effect of insufficient blood supply caused by the accidental stop of the blood pump on a patient is reduced.
Description
Technical Field
The invention belongs to the technical field of medical instrument software support, and particularly relates to a self-starting method applied to a ventricular assist device system.
Background
Ventricular assist devices are used to assist patients suffering from poor blood circulation and heart disease. As shown in fig. 1, ventricular assist devices generally include a blood pump, a controller, a power source, and a monitor. The blood pump is connected with the power supply through the controller, and the controller is connected with the monitor. Blood pumps may be implanted in the body of a patient to assist the heart and provide improved blood circulation. Which is connected to the controller via a drive cable. The power supply includes a portable battery and an ac adapter, the power supply being connected to the controller to power the controller and the blood pump. The battery can be selected to supply power when the patient is out of the way, and the ac adapter can be selected to supply power when the patient is at rest in the room for a long period of time. The patient cannot change the working state of the blood pump by himself, and the working state of the blood pump must be set or adjusted by a professional (doctor) according to the condition of the patient. Specifically, in a hospital, after the monitor is connected to the controller, a doctor sets or adjusts the working state of the blood pump according to the monitoring of the monitor, so that the output flow of the blood pump is adapted to the needs of a patient. That is, the output flow rate of the blood pump and the like need to be better adjusted by monitoring with a monitor.
An unexpected pump down event may occur when the patient uses the ventricular assist device. For example, the blood pump is disconnected from the drive cable of the controller accidentally, resulting in the blood pump stopping; or the patient mistakenly enters a strong electromagnetic interference environment, and the ventricular assist system is subjected to strong interference, so that the blood pump stops working accidentally. When the blood pump is stopped accidentally, the blood pump should be restored to work as soon as possible, otherwise the patient may be injured or even die due to the long-time insufficient blood supply. However, in view of safety, the controller itself is not provided with a man-machine interface for starting the blood pump, so that the monitor should be connected to restart the blood pump as soon as possible. In actual use, when the blood pump is stopped accidentally, the patient is most likely not in a hospital environment, at which point it is necessary to go to the hospital immediately to restart the blood pump. During this time, if the traffic takes too long, the patient may still be injured by a long blood supply deficiency, and even die. After the blood pump stops working accidentally, how to make the system start the blood pump by itself and make the blood pump recover to the working state immediately before stopping working accidentally is a technical problem to be solved at present.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a self-starting method applied to a ventricular assist device system.
The aim of the invention is achieved by the following technical scheme:
a self-priming method for a ventricular assist device system, comprising the steps of:
s1, after initialization, reading expected working state data of the blood pump stored in a nonvolatile memory, judging validity of the read data, and correspondingly setting the identification of the expected working state data of the blood pump as normal or abnormal;
s2, respectively controlling according to the marks of different expected working state data of the blood pump;
s3, continuously comparing and judging whether the expected working state data of the blood pump in the random storage area of the microprocessor is consistent with the actual working state data of the blood pump; and processing is carried out until the actual working state of the blood pump completely reaches the expected state.
Preferably, the step S2 includes the steps of:
s21, if the set blood pump expected working state data is marked as normal, assigning the read blood pump expected working state data value in the nonvolatile memory to the blood pump expected working state data in the random memory area of the microprocessor;
s22, if the set blood pump expected working state data is marked as abnormal, setting the blood pump expected magnetic suspension control state and the blood pump expected motor control state in the microprocessor random storage area to be opened, and setting the blood pump expected rotating speed control target in the microprocessor random storage area to be a default safe rotating speed.
Preferably, the step S3 includes the steps of:
s31, judging the consistency of expected working state data of the blood pump and actual working state data of the blood pump in a random storage area of the microprocessor: if so, entering S32; if not, entering S35;
s32, judging whether an instruction from the controller is received or not: if yes, go to S33; if not, returning to repeat the step S31;
s33, judging whether the received instruction is a blood pump control instruction, and feeding back an instruction execution result to the controller after the instruction is correspondingly executed. If the non-blood pump control instruction is executed, directly returning to repeat the step S31 after the execution result is fed back; if the blood pump control command is executed, the process goes to S34;
s34, the actual working state data of the blood pump is assigned to the expected working state data of the blood pump in the random storage area of the microprocessor; storing the expected working state data of the blood pump in the random storage area of the microprocessor into a nonvolatile memory, and returning to repeat the step S31;
s35, judging whether a blood pump control instruction is received or not: if yes, executing the instruction and feeding back the result to the controller, and returning to repeat the step S34; if the control instruction of the blood pump is not received, comparing and processing the expected working state of the blood pump and the actual working state of the blood pump in the random storage area of the microprocessor.
Preferably, the comparing and processing of the expected operating state of the blood pump and the actual operating state of the blood pump in the random storage area of the microprocessor in S35 includes the following steps:
s36, judging whether the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is consistent with the actual magnetic suspension control state of the blood pump or not: if the two values are consistent, the S37 is entered; if the magnetic suspension control states are inconsistent, judging and processing the expected magnetic suspension control states of the blood pump entering the random storage area of the microprocessor;
s37, judging whether the expected motor control state of the blood pump in the random storage area of the microprocessor is consistent with the actual motor control state of the blood pump or not: if so, entering S38; if the control states are inconsistent, judging and processing the control state of the expected motor of the blood pump entering the random storage area of the microprocessor;
s38, judging whether the expected motor speed control target of the blood pump in the random storage area of the microprocessor is consistent with the actual motor control target of the blood pump or not: if so, returning to repeat the step S31; if the motor speed control targets are inconsistent, assigning the expected motor speed control targets of the blood pump in the random storage area of the microprocessor to the actual motor speed control targets of the blood pump, and returning to repeat S31.
Preferably, the judging and processing of the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor in S36 includes the following steps:
s361, judging whether the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is on or not: if yes, go to S362; if not, go to S363;
s362, increasing the number of times of magnetic suspension control self-starting, and floating the rotor. Returning to repeat the step S35 when the rotor floats successfully; if not, judging whether the self-starting times of the magnetic suspension control reach the maximum allowable times or not: if not, returning to repeat the step S35; if the abnormal state is reached, judging the abnormal state, and entering S4 to process the abnormal state;
s363, judging whether the blood pump rotor is rotating: if yes, stopping rotating the rotor, stopping suspending the rotor, and returning to repeat the step S35; if not, the suspension rotor is directly stopped and then returned to repeat S35.
Preferably, the judging and processing of the control state of the blood pump expected motor in the random memory area of the microprocessor in S37 includes the following steps:
s371, judging whether the control state of the expected motor of the blood pump in the random storage area of the microprocessor is on or not: if yes, go to S372; if not, stopping rotating the rotor, and returning to repeat the step S35;
s372, judging whether the blood pump rotor is in suspension: if yes, go to S373; if not, setting the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor to be on, storing the expected working state data of the blood pump in the random storage area of the microprocessor into a nonvolatile memory, and returning to repeat the step S35;
and S373, increasing the number of motor control self-starting times and rotating the rotor. If the rotor rotation is successful, returning to repeat the step S35, and if not, entering the step S374;
s374, judging whether the self-starting times of motor control reach the maximum allowable times or not: if not, returning to repeat the step S35; if yes, judging that the state is abnormal, and entering S4 to process the abnormal state;
preferably, the processing of the abnormal state in S362 and S374 includes the following steps:
s4, delaying for a specified time, suspending the self-starting action, then setting the motor control self-starting times to zero, setting the magnetic suspension control self-starting times to zero, and returning to repeat S31.
Preferably, the expected operating state data of the blood pump in S1 refers to operating state data of the blood pump, which is adjusted according to the requirement and is required by the patient when the blood pump is used, and the operating state data of the blood pump includes a magnetic suspension control state, a motor control state and a motor rotation speed control target.
Preferably, the instructions of the controller in S32 include a blood pump control instruction and a non-blood pump control instruction, where the blood pump control instruction includes a magnetic levitation switch control instruction, a motor switch control instruction and a motor speed regulation instruction, and the non-blood pump control instruction includes an instruction for acquiring a blood pump state.
Preferably, the number of times of the magnetic levitation control self-starting in S362 and the accumulation of the number of times of the motor control self-starting in S373 are both limited according to the blood pump index.
Preferably, the delay time designated in S4 is determined according to the heat dissipation performance of the blood pump.
The beneficial effects of the invention are as follows: when the blood pump stops working accidentally, the method can immediately and automatically start the blood pump without the intervention of a user under the condition of not being connected with a monitor, so that the blood pump is restored to the last normal running state, the blood pump stop time is shortened, and the adverse effect of insufficient blood supply caused by accidental stopping of the blood pump on a patient is reduced.
When the connection between the blood pump and the controller is accidentally disconnected, if the reconnection is successful, the method may attempt to return the blood pump to the operational state prior to the accidental power failure.
In order to reduce the influence of the situation on the self-starting performance, the invention simultaneously saves the data of the expected working state of the blood pump in the random memory area and the nonvolatile memory of the microprocessor in consideration of the possible damage of the nonvolatile memory data.
When the system operates normally, the expected working state data of the blood pump is obtained from the random storage area, and the expected working state data of the blood pump is obtained from the nonvolatile memory only at the beginning of the system operation (namely, power-on), so that the influence of the data state of the nonvolatile memory on the self-starting method is effectively reduced. Even when the blood pump is powered on again, the data of the nonvolatile memory is found to be invalid, the invention starts the default safe rotating speed, so that the blood pump is automatically started to the default safe rotating speed, and a patient can go to a hospital for the next treatment under the support of the basic blood flow.
In addition, when communication between the patient's implanted blood pump and the external controller fails and the pump is accidentally stopped, the physician has conventionally been unable to restart the blood pump via the monitor, and the patient is more exposed to the procedure of withdrawing the blood pump, except for the effect of insufficient blood supply. The self-starting method provided by the invention is implemented in the blood pump, and the blood pump can still be self-started to a rotating state at the moment, so that part of patients do not need to perform operation for removing the blood pump.
Drawings
Fig. 1: the connection relation among components in the ventricular assist device is shown schematically.
Fig. 2: the partial flow diagram of the process of the invention.
Fig. 3: schematic flow chart at S3 of the method of the invention.
Fig. 4: the flow chart after entering S35 in the method of the invention is schematically shown.
Fig. 5: the flow chart after entering S36 in the method of the invention is shown.
Fig. 6: in the method, a flow diagram of judgment and processing of the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is shown.
Fig. 7: in the method, a flow diagram of judgment and processing of the control state of the expected motor of the blood pump in the random storage area of the microprocessor is shown.
Fig. 8: the flow diagram of the abnormal state processing in the method of the invention.
Detailed Description
The invention discloses a self-starting method applied to a ventricular assist device system, wherein the ventricular assist device is in the prior art, and a blood pump is generally comprised of a pump rotor structure, wherein the pump rotor structure of a full-magnetic suspension blood pump adopts a magnetic suspension bearing to realize the support of a rotor. When the magnetic suspension bearing control is turned on, the pump rotor is in a suspension state, and then the motor control is turned on to drive the pump rotor to rotate, so that blood flow can be driven, and the blood flow of a patient is increased. The power electronics driving the magnetic bearing and the rotor to rotate may be provided in the blood pump or in the controller.
The controller has the functions of transmitting the electric energy of the power supply to the blood pump, receiving, implementing and feeding back the instruction from the monitor, monitoring and diagnosing the working state of the blood pump, and the like. If the power electronic components for driving the magnetic suspension bearing and the rotor to rotate are arranged on the controller, the controller also has the function of controlling the magnetic suspension bearing and the rotor of the blood pump to rotate. If the power electronics that drive the magnetic bearing and rotor to rotate are disposed within the blood pump, the drive cable that connects the controller to the blood pump should include communication functionality, and the controller sends control commands to the blood pump via the drive cable, as well as obtaining command responses and other information from the blood pump.
In the method, the operating state of the blood pump (the operating state of the blood pump suitable for a patient) adjusted by a doctor is taken as the expected operating state of the blood pump, when the blood pump stops working accidentally, the ventricular assist device can start the blood pump by itself without connecting a monitor by taking the expected operating state of the blood pump as a control target, and the operating state of the blood pump is restored to the operating state adjusted by the doctor. Meanwhile, the expected working state data of the blood pump is stored in the nonvolatile memory, and even if the blood pump is subjected to accidental power failure, the ventricular assist device can still acquire the expected working state of the blood pump before power failure and restart the blood pump as long as the blood pump is powered on again.
The invention is specifically described with reference to fig. 2-8, which illustrate a self-starting method of a ventricular assist device system, using an example in which power electronic components for driving a magnetic suspension bearing and a rotor to rotate are disposed in a blood pump.
When the controller is connected with the blood pump and the power supply, the system starts to operate after the microprocessor in the blood pump is electrified. The method comprises the following steps:
s1, after initialization, reading expected working state data of the blood pump stored in a nonvolatile memory, judging validity of the read data, and correspondingly setting the identification of the expected working state data of the blood pump as normal or abnormal; the expected working state data of the blood pump refers to the working state data of the blood pump which is adjusted according to the requirement and meets the requirement of a patient in use. The blood pump operating state data includes (hereinafter: magnetic suspension control state, motor control state and motor rotation speed control target. The magnetic suspension control state and the motor control state both comprise an opening state and a closing state.
S2, respectively controlling according to the marks of different expected working state data of the blood pump;
s3, continuously comparing and judging whether the expected working state data of the blood pump in the random storage area of the microprocessor is consistent with the actual working state data of the blood pump; and processing is carried out until the actual working state of the blood pump completely reaches the expected state.
Specifically, the step S2 includes the following steps:
s21, if the set blood pump expected working state data is marked as normal, assigning the read blood pump expected working state data value in the nonvolatile memory to the blood pump expected working state data in the random memory area of the microprocessor;
s22, if the set blood pump expected working state data is marked as abnormal, setting the blood pump expected magnetic suspension control state and the blood pump expected motor control state in the microprocessor random storage area to be opened, and setting the blood pump expected rotating speed control target in the microprocessor random storage area to be a default safe rotating speed. The default safe rotation speed refers to that when the blood pump rotates at the rotation speed, a basic blood flow demand can be provided for most patients, the blood flow is not necessarily the optimal flow, and the specific value is determined according to the detailed index of the corresponding blood pump.
The step S3 comprises the following steps:
s31, judging the consistency of expected working state data of the blood pump and actual working state data of the blood pump in a random storage area of the microprocessor: if so, entering S32; if not, entering S35;
s32, judging whether an instruction from the controller is received or not: if yes, go to S33; if not, returning to repeat the step S31; the instructions of the controller in the S32 comprise a blood pump control instruction and a non-blood pump control instruction, the blood pump control instruction comprises a magnetic suspension switch control instruction, a motor switch control instruction and a motor speed regulation instruction, and the other instructions are uniformly defined as the non-blood pump control instruction and comprise a blood pump state acquisition instruction.
S33, judging whether the received instruction is a blood pump control instruction, and feeding back an instruction execution result to the controller after the instruction is correspondingly executed. If the non-blood pump control instruction is executed, directly returning to repeat the step S31 after the execution result is fed back; if the blood pump control command is executed, the process goes to S34;
s34, the actual working state data of the blood pump is assigned to the expected working state data of the blood pump in the random storage area of the microprocessor; storing the expected working state data of the blood pump in the random storage area of the microprocessor into a nonvolatile memory, and returning to repeat the step S31;
s35, judging whether a blood pump control instruction is received or not: if yes, executing the instruction and feeding back the result to the controller, and returning to repeat the step S34; if the control instruction of the blood pump is not received, comparing and processing the expected working state of the blood pump and the actual working state of the blood pump in the random storage area of the microprocessor.
The comparison and processing of the expected working state of the blood pump and the actual working state of the blood pump in the random storage area of the microprocessor in the S35 comprises the following steps:
s36, judging whether the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is consistent with the actual magnetic suspension control state of the blood pump or not: if the two values are consistent, the S37 is entered; if the magnetic suspension control states are inconsistent, judging and processing the expected magnetic suspension control states of the blood pump entering the random storage area of the microprocessor;
the judging and processing of the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor in the S36 comprises the following steps:
s361, judging whether the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is on or not: if yes, go to S362; if not, go to S363;
s362, increasing the number of times of magnetic suspension control self-starting, and floating the rotor. Returning to repeat the step S35 when the rotor floats successfully; if not, judging whether the self-starting times of the magnetic suspension control reach the maximum allowable times or not: if not, returning to repeat the step S35; if the abnormal state is reached, judging the abnormal state, and entering S4 to process the abnormal state;
s363, judging whether the blood pump rotor is rotating: if yes, stopping rotating the rotor, stopping suspending the rotor, and returning to repeat the step S35; if not, the suspension rotor is directly stopped and then returned to repeat S35.
S37, judging whether the expected motor control state of the blood pump in the random storage area of the microprocessor is consistent with the actual motor control state of the blood pump or not: if so, entering S38; if the control states are inconsistent, judging and processing the control state of the expected motor of the blood pump entering the random storage area of the microprocessor;
the judging and processing of the control state of the expected motor of the blood pump in the random storage area of the microprocessor in the S37 comprises the following steps:
s371, judging whether the control state of the expected motor of the blood pump in the random storage area of the microprocessor is on or not: if yes, go to S372; if not, stopping rotating the rotor, and returning to repeat the step S35;
s372, judging whether the blood pump rotor is in suspension: if yes, go to S373; if not, setting the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor to be on, storing the expected working state data of the blood pump in the random storage area of the microprocessor into a nonvolatile memory, and returning to repeat the step S35;
in step S371 of the present invention, if the rotor of the blood pump is not suspended, that is, the expected working state of the blood pump is that the rotor is not suspended but needs to rotate, this situation is an abnormal situation, because the magnetic suspension blood pump can rotate the rotor only under the premise of opening the magnetic suspension bearing control (rotor suspension). For this abnormal situation, the scheme is designed to readjust the expected working state of the blood pump to the state that the rotor needs to suspend and rotate, and the rotating speed target is not changed. Therefore, the blood pump software turns on the blood pump intended magnetic levitation control state in the microprocessor random access area, stores the blood pump intended operation state data in the microprocessor random access area into the nonvolatile memory, and returns to repeat S35.
And S373, increasing the number of motor control self-starting times and rotating the rotor. If the rotor is rotated successfully, returning to repeat S35; if not, then enter S374;
s374, judging whether the self-starting times of motor control reach the maximum allowable times or not: if not, returning to repeat the step S35; if yes, the abnormal state is determined, and the process goes to S4 to process the abnormal state.
S38, judging whether the expected motor speed control target of the blood pump in the random storage area of the microprocessor is consistent with the actual motor control target of the blood pump or not: if so, returning to repeat the step S31; if the motor speed control targets are inconsistent, assigning the expected motor speed control targets of the blood pump in the random storage area of the microprocessor to the actual motor speed control targets of the blood pump, and returning to repeat S31.
The abnormal state processing in S362 and S374 includes the steps of:
s4, delaying for a specified time, suspending the self-starting action, then setting the motor control self-starting times to zero, setting the magnetic suspension control self-starting times to zero, and returning to repeat S31.
In addition, it should be noted that, in the floating rotor and the rotating motor in the self-starting process, the power supply can provide larger electric energy to the blood pump, part of the electric energy can be converted into heat, if the motor finally fails to rotate successfully, the heat cannot be dissipated by rotating the rotor to drive the blood to flow, and then the temperature of the blood pump can rise after the heat is accumulated. When the temperature of the blood pump rises to a certain extent, damage to the patient and even death can occur. Therefore, in order to prevent the temperature rise caused by the self-starting failure under the extreme condition from damaging the health of a patient, in the technical scheme, the self-starting times of the magnetic suspension control and the self-starting times of the motor control are limited, after the failure accumulation reaches a certain number of times, the self-starting attempt is stopped for a period of time, the accumulated heat is dissipated, and then whether the self-starting is started again is judged according to the actual working condition and the expected state of the blood pump. The number of the magnetic suspension control self-starting times, the number of the motor control self-starting times and the heat dissipation time are determined according to detailed indexes of the blood pump, and finally the temperature rise influence is controlled to an acceptable range.
When the expected operating state data of the blood pump is identified as "abnormal", the blood pump may be self-started to a default safe rotational speed, and the ventricular assist system may incorporate the identification to further process the blood pump, for example, to prompt the user that the blood pump may not be operating at the rotational speed previously set by the doctor, to prompt the user to take further action, for example, to go to the hospital to readjust the ventricular assist device setting.
The method of the invention effectively avoids the occurrence of death of the patient caused by accidental pump stoppage in the prior art and possibly delay treatment during the patient goes to the hospital.
And the above embodiments are only for illustrating the technical solution of the present invention, not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A self-starting method applied to a ventricular assist device system, characterized by: the method comprises the following steps:
s1, after initialization, reading expected working state data of the blood pump stored in a nonvolatile memory, judging validity of the read data, and correspondingly setting the identification of the expected working state data of the blood pump as normal or abnormal;
s2, respectively controlling according to the marks of different expected working state data of the blood pump;
s3, continuously comparing and judging whether the expected working state data of the blood pump in the random storage area of the microprocessor is consistent with the actual working state data of the blood pump; and processing until the actual working state of the blood pump completely reaches the expected state;
the step S2 comprises the following steps:
s21, if the set blood pump expected working state data is marked as normal, assigning the read blood pump expected working state data value in the nonvolatile memory to the blood pump expected working state data in the random memory area of the microprocessor;
s22, if the set blood pump expected working state data is marked as abnormal, setting a blood pump expected magnetic suspension control state and a blood pump expected motor control state in a random storage area of the microprocessor to be opened, and setting a blood pump expected rotating speed control target in the random storage area of the microprocessor to be a default safe rotating speed; the blood pump expected working state data in the step S1 refers to blood pump working state data which is adjusted according to requirements and is required by patients when the blood pump is used, and the blood pump working state data comprises a magnetic suspension control state, a motor control state and a motor rotating speed control target.
2. A self-priming method for a ventricular assist device system as claimed in claim 1 wherein: the step S3 comprises the following steps:
s31, judging the consistency of expected working state data of the blood pump and actual working state data of the blood pump in a random storage area of the microprocessor: if so, entering S32; if not, entering S35;
s32, judging whether an instruction from the controller is received or not: if yes, go to S33; if not, returning to repeat the step S31;
s33, judging whether the received instruction is a blood pump control instruction, and feeding back an instruction execution result to the controller after the instruction is correspondingly executed; if the non-blood pump control instruction is executed, directly returning to repeat the step S31 after the execution result is fed back; if the blood pump control command is executed, the process goes to S34;
s34, the actual working state data of the blood pump is assigned to the expected working state data of the blood pump in the random storage area of the microprocessor; storing the expected working state data of the blood pump in the random storage area of the microprocessor into a nonvolatile memory, and returning to repeat the step S31;
s35, judging whether a blood pump control instruction is received or not: if yes, executing the instruction and feeding back the result to the controller, and returning to repeat the step S34; if the control instruction of the blood pump is not received, comparing and processing the expected working state of the blood pump and the actual working state of the blood pump in the random storage area of the microprocessor.
3. A self-priming method for use in a ventricular assist device system as claimed in claim 2 wherein: the comparison and processing of the expected working state of the blood pump and the actual working state of the blood pump in the random storage area of the microprocessor in the S35 comprises the following steps:
s36, judging whether the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is consistent with the actual magnetic suspension control state of the blood pump or not: if the two values are consistent, the S37 is entered; if the magnetic suspension control states are inconsistent, judging and processing the expected magnetic suspension control states of the blood pump entering the random storage area of the microprocessor;
s37, judging whether the expected motor control state of the blood pump in the random storage area of the microprocessor is consistent with the actual motor control state of the blood pump or not: if so, entering S38; if the control states are inconsistent, judging and processing the control state of the expected motor of the blood pump entering the random storage area of the microprocessor;
s38, judging whether the expected motor speed control target of the blood pump in the random storage area of the microprocessor is consistent with the actual motor control target of the blood pump or not: if so, returning to repeat the step S31; if the motor speed control targets are inconsistent, assigning the expected motor speed control targets of the blood pump in the random storage area of the microprocessor to the actual motor speed control targets of the blood pump, and returning to repeat S31.
4. A self-priming method for use in a ventricular assist device system as claimed in claim 3, wherein: the judging and processing of the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor in the S36 comprises the following steps:
s361, judging whether the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor is on or not: if yes, go to S362; if not, go to S363;
s362, increasing the number of times of magnetic suspension control self-starting, floating the rotor, and returning to repeat S35 when the rotor is successfully floated; if not, judging whether the self-starting times of the magnetic suspension control reach the maximum allowable times, if not, returning to repeat the step S35, if so, judging as an abnormal state, and entering the step S4 to process the abnormal state;
s363, judging whether the blood pump rotor is rotating: if yes, stopping rotating the rotor, stopping suspending the rotor, and returning to repeat the step S35; if not, the suspension rotor is directly stopped and then returned to repeat S35.
5. A self-priming method for use in a ventricular assist device system as claimed in claim 3, wherein: judging and processing the control state of the expected motor of the blood pump in the random storage area of the microprocessor in the S37;
s371, judging whether the control state of the expected motor of the blood pump in the random storage area of the microprocessor is on or not: if yes, go to S372; if not, stopping rotating the rotor, and returning to repeat the step S35;
s372, judging whether the blood pump rotor is in suspension: if yes, go to S373; if not, setting the expected magnetic suspension control state of the blood pump in the random storage area of the microprocessor to be on, storing the expected working state data of the blood pump in the random storage area of the microprocessor into a nonvolatile memory, and returning to repeat the step S35;
s373, increasing the number of motor control self-starting times and rotating the rotor; if the rotor is rotated successfully, returning to repeat S35; if not, then enter S374;
s374, judging whether the self-starting times of motor control reach the maximum allowable times or not: if not, returning to repeat the step S35; if yes, the abnormal state is determined, and the process goes to S4 to process the abnormal state.
6. A self-priming method for a ventricular assist device system as claimed in claim 4 or 5 wherein: the abnormal state processing includes the steps of:
s4, delaying for a specified time, suspending the self-starting action, then setting the motor control self-starting times to zero, setting the magnetic suspension control self-starting times to zero, and returning to repeat S31.
7. A self-priming method for use in a ventricular assist device system as claimed in claim 2 wherein: the instructions of the controller in the S32 comprise a blood pump control instruction and a non-blood pump control instruction, wherein the blood pump control instruction comprises a magnetic suspension switch control instruction, a motor switch control instruction and a motor speed regulation instruction, and the non-blood pump control instruction comprises an instruction for acquiring a blood pump state.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104511060A (en) * | 2013-10-03 | 2015-04-15 | 北京精密机电控制设备研究所 | Blood pump control system and blood pump system |
| CN111315423A (en) * | 2017-11-03 | 2020-06-19 | 心脏器械股份有限公司 | Updating VAD systems without stopping pumps |
| CN211096484U (en) * | 2019-07-12 | 2020-07-28 | 航天泰心科技有限公司 | Blood pump control circuit and ventricle auxiliary device |
| CN114949583A (en) * | 2021-02-26 | 2022-08-30 | 株式会社太阳医疗技术研究所 | Blood pump monitoring system and program |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5201887B2 (en) * | 2007-06-20 | 2013-06-05 | テルモ株式会社 | Blood pump system for artificial heart and device monitoring system |
| EP3131595B1 (en) * | 2014-04-15 | 2020-09-09 | Tc1 Llc | Systems for lvad operation during communication losses |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104511060A (en) * | 2013-10-03 | 2015-04-15 | 北京精密机电控制设备研究所 | Blood pump control system and blood pump system |
| CN111315423A (en) * | 2017-11-03 | 2020-06-19 | 心脏器械股份有限公司 | Updating VAD systems without stopping pumps |
| CN211096484U (en) * | 2019-07-12 | 2020-07-28 | 航天泰心科技有限公司 | Blood pump control circuit and ventricle auxiliary device |
| CN114949583A (en) * | 2021-02-26 | 2022-08-30 | 株式会社太阳医疗技术研究所 | Blood pump monitoring system and program |
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