CN110825566B

CN110825566B - FFR host with data recovery function

Info

Publication number: CN110825566B
Application number: CN201911144208.XA
Authority: CN
Inventors: 邵小虎; 熊双涛; 陈丽丽; 宋亮
Original assignee: Insight Lifetech Co Ltd
Current assignee: Insight Lifetech Co Ltd
Priority date: 2017-12-30
Filing date: 2018-12-30
Publication date: 2020-12-01
Anticipated expiration: 2038-12-30
Also published as: CN109460324B; CN110879766A; CN110825566A; CN209357045U; CN109460324A; CN110879766B

Abstract

The invention provides an FFR host with a data recovery function, which is characterized by comprising the following components: the system comprises a marking module and a control module, wherein the marking module comprises a digital signal generator, the digital signal generator generates a first digital signal when starting up and a second digital signal when normally shutting down, and the first digital signal and the second digital signal are used as shutdown marks of an FFR host; a non-volatile storage module for storing at least a shutdown flag; the monitoring module is used for acquiring real-time data of the patient and writing the data into the nonvolatile storage module; the checking module is used for reading the shutdown marker when the computer is started and judging whether the shutdown marker is in an abnormal shutdown state; and the recovery module is used for judging whether to extract the real-time data from the nonvolatile storage module or not based on the shutdown marker, and extracting the real-time data from the nonvolatile storage module when the shutdown marker is in an abnormal shutdown state. According to the invention, the data loss caused by abnormal shutdown caused by sudden power failure can be effectively prevented.

Description

FFR host with data recovery function

The application is filed as12 month and 30 days 2018Application No. is2018116469281The invention is named asFFR master Data recovery system and data recovery method for computerDivisional application of the patent application.

Technical Field

The invention relates to an FFR host with a data recovery function.

Background

Fractional Flow Reserve (FFR) is used to assess the extent to which a stenotic lesion obstructs blood flow through a blood vessel. To calculate the FFR for a given stenosis, two blood pressure readings are taken. One blood pressure reading is taken on the distal side of the stenosis and the other blood pressure reading is taken on the proximal side of the stenosis. FFR is defined as the ratio of the maximum blood flow to the normal maximum blood flow in a stenosed artery taken distal to the lesion and is usually calculated based on the pressure gradient of the measured pressure from the distal pressure to the proximal pressure.

In some applications where a guidewire-based pressure sensor is used, the guidewire has to be repositioned each time a measurement is made, and in cases where multiple lesions are encountered, even multiple repositioning is required for measuring each lesion, which is obviously time consuming and can cause many undesirable effects. Particularly, in the area with unstable power supply, if sudden power failure occurs, the measurement is often interrupted, and even the data measured before is lost.

At present, before the FFR system is abnormally shut down, patient data and sensor calibration data are usually recorded in a file, and when the system is started next time, the data are read from the file, and the data are checked and recovered. However, the time for reading and writing the file is long, the abnormal power-off time is long and uncertain, and once the power is off, the file read and written at the power-off time is usually damaged. Once the file storing the data is corrupted, the system cannot read the data therein, nor can the check be recovered.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide an FFR host having a data recovery function that effectively prevents data loss due to abnormal shutdown.

To this end, the present invention provides an FFR host having a data recovery function, comprising: the marking module is used for setting a shutdown mark; a nonvolatile storage module for storing the shutdown flag; the monitoring module is used for acquiring real-time data of a patient and writing the data into the nonvolatile storage module; the checking module is used for reading the shutdown marker and judging whether the shutdown marker is in an abnormal shutdown state; and the recovery module is used for judging whether to extract the real-time data from the nonvolatile storage module or not based on the shutdown marker, and extracting the real-time data from the nonvolatile storage module when the shutdown marker is in an abnormal shutdown state.

In the invention, firstly, a shutdown mark is set for a system after startup and a shutdown mark is set for a system after normal shutdown through a marking module, and the shutdown mark is written into a nonvolatile storage module. When the computer is started again, the check module reads the shutdown mark from the nonvolatile storage module, judges whether the data needs to be recovered or not, if not, enters a normal starting step, and if the abnormal shutdown state is judged and the data needs to be recovered, enters a recovery module. And after the recovery module is started, reading data before power failure from the nonvolatile storage module, and then entering a normal starting step. Under the condition, even if the condition of sudden power failure occurs, the examination and treatment can be continuously carried out by using the data before power failure stored in the nonvolatile storage module after the restart without rechecking, so that the possibility of data loss caused by abnormal shutdown can be reduced, and the time of doctors and patients is greatly saved.

In the FFR host related to the present invention, optionally, in the flag module, a shutdown flag of "waiting for shutdown" is set when the FFR host is powered on, and a shutdown flag of "normal" is set when the FFR host is normally powered off. When the power is turned on, the check module reads the power-off mark as 'waiting for power off', and judges the power is in the abnormal power-off state, and when the power-off mark is 'normal', the check module judges the power is normally turned off. In this case, after the abnormal shutdown, the shutdown flag detected by the verification module is "to be shutdown" when the system is restarted, so that whether the previous shutdown belongs to the normal shutdown or the abnormal shutdown can be simply determined.

In the FFR host according to the present invention, optionally, the FFR host further includes a zero calibration module, and the zero calibration module is configured to poll and record a timestamp and update a zero calibration state at regular time, and write data into the nonvolatile storage module. Therefore, the checking module can judge whether the abnormal shutdown is completed or not through the timestamp and the zero calibration state, so that whether the data recovery operation is performed or not is judged automatically.

In the FFR host according to the present invention, optionally, the zeroing status includes: zero calibration, zero calibration not, zero calibration success, and zero calibration failure. Therefore, whether the check before the shutdown is finished last time can be judged according to the zero calibration state.

In the FFR host according to the present invention, optionally, the checking module further reads and checks a timestamp and a zero status from the nonvolatile storage module, and is configured to determine whether the examination of the patient before the abnormal shutdown is finished. This makes it possible to appropriately recover data.

In the FFR host according to the present invention, optionally, the recovery module further includes reading the sensor data from the nonvolatile memory module and recovering the sensor zero calibration. Thus, the measurement can be continued immediately before shutdown.

In the FFR host according to the present invention, optionally, the nonvolatile memory module is a programmable program memory (EEPROM). Therefore, real-time monitoring data can be stored rapidly, and loss is prevented.

In the FFR host according to the present invention, optionally, the real-time data includes sensor data and patient data. This enables sensor data and patient data to be provided for data recovery.

According to the invention, the FFR host with the data recovery function can be provided, which can effectively prevent data loss caused by abnormal shutdown.

Drawings

Fig. 1 is a block diagram showing an FFR master according to embodiment 1 of the present invention.

Fig. 2 is a monitoring block diagram showing the FFR master according to embodiment 1 of the present invention.

Fig. 3 is a flowchart showing a data recovery method of the FFR host according to embodiment 1 of the present invention.

Fig. 4 is a block diagram showing another example of the FFR host according to embodiment 2 of the present invention.

Fig. 5 is a flowchart showing a data recovery method of the FFR host according to embodiment 2 of the present invention.

Fig. 6 is a flowchart showing the zeroing step of the data recovery method of the FFR host according to embodiment 2 of the present invention.

Fig. 7 is a flowchart showing the recovery procedure of the data recovery method of the FFR host according to embodiment 2 of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

It is noted that, as used herein, the terms "comprises," "comprising," or any other variation thereof, such that a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In addition, the headings and the like designed in the following description of the present invention are not intended to limit the content or scope of the present invention, but merely serve as a reminder for reading. Such a subtitle should not be understood as a means for segmenting article content, nor should the content under the subtitle be limited to only the scope of the subtitle.

[ embodiment 1 ]

Hereinafter, embodiment 1 of the present invention will be described in detail with reference to fig. 1 and 2. Fig. 1 is a block diagram showing a data recovery system of an FFR host according to embodiment 1 of the present invention. Fig. 2 is a monitoring block diagram showing the data recovery system of the FFR host according to embodiment 1 of the present invention.

As shown in fig. 1, the FFR host data recovery system (hereinafter, sometimes referred to as "data recovery system") S1 according to the present embodiment may include a check module 110, a recovery module 120, a marker module 130, a monitoring module 140, and a nonvolatile storage module 150.

In the data recovery system S1 according to this embodiment, the flag module 130 may be configured to set a shutdown flag; the non-volatile storage module 150 may be configured to store at least the shutdown flag; the monitoring module 140 may be used to obtain real-time data of the patient and write to the non-volatile memory module 150; the checking module 110 may be configured to read the shutdown flag, and determine whether the shutdown flag is in an abnormal shutdown state; and the recovery module 120 may determine whether to extract the real-time data from the storage module based on the shutdown flag, and extract the real-time data from the nonvolatile storage module 150 when the shutdown flag is in an abnormal shutdown state.

In the present embodiment, first, the flag block 130 sets a shutdown flag for the system after shutdown and sets a shutdown flag for the system after normal shutdown, and writes the shutdown flags into the nonvolatile memory block 150. When the computer is powered on again, the check module 110 first reads the power-off flag from the nonvolatile memory module 150, and determines whether data needs to be restored, if not, the computer enters a normal startup procedure, and if it is determined that the computer is in an abnormal power-off state and data needs to be restored, the computer enters the restoration module 120. After the recovery module 120 is started, the data before power failure is read from the nonvolatile memory module 150, and is recovered to the monitoring module 140, and then the normal start procedure is performed. In this case, even if an unexpected power failure occurs, the examination and treatment can be continued by using the pre-power-failure data stored in the nonvolatile memory module 150 after the restart without re-detection. The condition of data loss caused by abnormal shutdown caused by sudden power failure is prevented, the time of doctors and patients is greatly saved, and a solution is provided for various unexpected power failure conditions.

In this embodiment, the checking module 110 (described later) may determine whether to enter the recovering module 120 by checking a shutdown flag, and the marking module 130 may include a shutdown flag set to "wait for shutdown" when the power is turned on, and a shutdown flag set to "normal" when the power is normally turned off.

In this embodiment, the marking module 130 may obtain the last recorded shutdown marker by reading the digital signal from the nonvolatile storage module 150, and after updating the last recorded shutdown marker to the current shutdown marker, write the last recorded shutdown marker into the nonvolatile storage module 150. Therefore, the shutdown flag after power failure can be prevented from being lost, and the data cannot be automatically entered into the recovery module 120 for data recovery.

In some examples, the shutdown flag may be a digital signal generated by a digital signal generator, e.g., "to shutdown" may be 1 and "normal" is 0. That is, before normal shutdown, the inverse operation may be performed on the digital signal and the digital signal may be written into the nonvolatile memory module 150 instead of the previous digital signal. In other examples, the digital signal of the digital signal generator may be 0, in which case the shutdown flag for "to shutdown" is 0 and the shutdown flag for "normal" is 1.

In other examples, the shutdown flag may also be comprised of two digital signals. For example, when the computer is turned on, the first digital signal 1 is written into the nonvolatile memory module 150, when the computer is turned off, the second digital signal 0 is written into the nonvolatile memory module 150 and replaces the previous digital signal 1, when the computer is turned on again, the first digital signal 1 is written into the nonvolatile memory module 150 and replaces the previous power-off mark, that is, the previous power-off mark is replaced by the two digital signals when the power-off mark needs to be updated each time. In other examples, the digital signal corresponding to the power-off flag at power-on may be 0, and the digital signal corresponding to the power-off flag at power-off may be 1. In this case, by using a mode in which two digital signals are alternately written as the shutdown flag, it is possible to prevent an operation error or instability from occurring.

In this embodiment, the nonvolatile storage module 150 may at least store a shutdown flag, and the verification module 110 determines whether the last shutdown is an abnormal shutdown by reading the shutdown flag. In some examples, the nonvolatile storage module 150 may also store sensor data and patient data, and the recovery module 120 (described later) restores the data to the corresponding module by reading the sensor data and the patient data. Therefore, the data before abnormal shutdown can be linked up, and the measurement is continued.

In other examples, non-volatile storage module 150 may also store a timestamp and a zeroing status. Here, the time stamp refers to a mark every time the sensor stores data to the nonvolatile memory module 150. In some examples, the updated timestamp may replace the previous timestamp. This can save a memory space.

Additionally, in some examples, the non-volatile storage module 150 may also match patient data with sensor data. This reduces the possibility of occurrence of excessive restoration data or missing restoration data.

In this embodiment, the nonvolatile memory module 150 may be composed of an Electrically Erasable Programmable Read Only Memory (EEPROM), and since it does not refresh the contents of the memory at regular time, it has a fixed nature that the data stored therein is not lost when power is off. Therefore, real-time monitoring data can be stored rapidly, and loss is prevented.

In some examples, nonvolatile memory module 150 may also be comprised of Read Only Memory (ROM), Programmable Read Only Memory (PROM), Erasable Programmable Read Only Memory (EPROM), or ferroelectric memory (FeRAM). In this case, the nonvolatile memory module 150 has the characteristics of high storage stability and difficulty in losing the data stored in the memory, so that a stable storage structure can be provided for the data recovery system S1 after abnormal shutdown.

In this embodiment, the monitoring module 140 obtains real-time data of the patient by means of the sensors 141 and information input, and writes the data into the non-volatile memory module 150.

In this embodiment, the real-time data includes sensor data and patient data, and the monitoring module 140 measures pressure data on both sides of the lesion by the pressure sensor 141. In some examples, the sensor data is comprised of Pa measured by a proximal pressure sensing probe near the heart near the lesion and Pd measured by a distal pressure sensing probe away from the heart. In some examples, the patient data is, for example, patient ID, age, medical record information, and the like.

As shown in fig. 2, in the present embodiment, the signal obtained by the sensor 141 is an analog signal, and after the signal is removed by the RC filter 142, the analog signal is converted into a digital signal by the analog-to-digital converter (ADC)144, wherein since the analog-to-digital converter (ADC)144 can only convert one analog signal at a time, a selection module 143 needs to be added in the prior art so that the analog signal can sequentially pass through the analog-to-digital converter (ADC)144 module, and simultaneously be written into the nonvolatile memory module 150 for storage, and finally the digital signal is sent to the display 145 for display.

In the present embodiment, the signal obtained by the sensor 141 may be a differential signal, where the differential signal refers to two signals with equal amplitude, same phase and opposite polarity, and the differential signal transmission also requires two wires, and unlike a single-ended signal, both the two wires for transmitting the differential signal are used for transmitting a pressure signal, where the two wires for transmitting the differential signal are necessarily two wires that are equal in length, equal in width, and closely adjacent to each other and on the same plane.

In addition, in the present embodiment, the differential signal has an advantage of strong interference resistance, because the interference noise is generally simultaneously applied to the two wires for transmitting the differential signal, and the interference noise on the two wires is the same in magnitude, the difference value of the interference noise on the two wires for transmitting the differential signal is 0, and the differential signal is processed and analyzed mainly by the difference value of the two voltages of the differential signal, so that the interference noise has a small influence on the differential signal.

In addition, in the present embodiment, the differential signal has an advantage that electromagnetic interference can be effectively suppressed. Because two wires for transmitting differential signals are close to each other and the amplitudes of signals on the two wires are the same, the amplitudes of coupling electromagnetic fields between the two wires and the ground wire are also the same, and in addition, the polarities of signals on the two wires are opposite, and the generated electromagnetic fields are mutually cancelled. Therefore, the influence of electromagnetic interference to the outside on the differential signal is small.

In addition, in some examples, the signal obtained by the sensor 141 may also be a single-ended signal, which requires two wires for transmission, one wire for transmitting the pressure signal and the other wire for transmitting the ground signal.

In this embodiment, the patient data may be obtained by manual input.

In some examples, the patient data may also be obtained by scanning a personal information barcode or cloud transmission.

This enables sensor data and patient data to be provided for data recovery.

In this embodiment, the checking module 110 determines whether the last shutdown is in an abnormal shutdown state by reading the shutdown flag from the storage module and then determining the shutdown flag, and if the last shutdown is in the abnormal shutdown state, the recovering module 120 is entered.

When the system is powered on, the check module 110 reads the power-off flag as "waiting to be powered off", and determines the system to be in an abnormal power-off state, and when the power-off flag is "normal", determines the system to be in a normal power-off state.

In some examples, when "to be shut down" is 1 and "normal" is 0, the shutdown flag detected by powering on again after abnormal shutdown will be 1. When the "to-be-shut-down" is 0 and the "normal" is also 1, the shut-down flag detected by restarting after abnormal shut-down will be 0. In this case, after the abnormal shutdown, the shutdown flag detected by the verification module 110 is "to be shutdown" when the system is restarted, so that it can be simply determined whether the previous shutdown belongs to the normal shutdown or the abnormal shutdown.

In other examples, the shutdown flag may also be comprised of two digital signals. For example, when the computer is powered on, the first digital signal 1 is written into the nonvolatile memory module 150, when the computer is powered off, the second digital signal 0 is written into the nonvolatile memory module 150 and replaces the previous digital signal 1, when the computer is powered on again, the first digital signal 1 is written into the nonvolatile memory module 150 and replaces the previous power-off mark, and when the computer is abnormally powered off, the power-off mark detected by the verification module 110 after the computer is powered on is 1. In this case, by using a mode in which two digital signals are alternately written as the shutdown flag, it is possible to prevent an operation error or instability from occurring.

In this embodiment, the checking module 110 determines whether the recovery module 120 needs to be used according to the shutdown flag, and when the shutdown flag is in an abnormal shutdown state, extracts real-time data from the nonvolatile storage module 150 and recovers the data to the monitoring module 140.

Therefore, data before abnormal shutdown can be linked up, and further measurement can be continued under the condition that measurement is not influenced.

Hereinafter, the data recovery method of the FFR host will be described in detail with reference to the drawings.

As shown in fig. 3, in the data recovery method of the FFR host according to the present embodiment, after the FFR host is started, the shutdown flag is extracted from the nonvolatile storage module 150, and whether the FFR host is in an abnormal shutdown state is determined according to the shutdown flag (step S110); if the shutdown flag is in an abnormal shutdown state, extracting check data before abnormal shutdown from the nonvolatile storage module to perform data recovery (step S120); if the shutdown flag is not in the abnormal shutdown state, the shutdown state is marked as 'waiting for shutdown', and the shutdown state is stored in the nonvolatile storage module (step S130); reading real-time data of a patient and storing the real-time data into the nonvolatile storage module (step S140); the system is shut down and a flag step is simultaneously entered, a shutdown flag is set to "normal", and the shutdown flag is stored in the nonvolatile memory module 150 (step S150).

In this case, even if an unexpected power failure occurs, the data before the power failure can be recovered by the recovery step after the restart to continue the inspection treatment without re-inspection. The condition of data loss caused by abnormal shutdown caused by sudden power failure is prevented, the time of doctors and patients is greatly saved, and a solution is provided for various unexpected power failure conditions.

[ 2 nd embodiment ]

Hereinafter, embodiment 2 of the present invention will be described in detail with reference to fig. 4 to 7.

Fig. 4 is a block diagram showing a data recovery system of an FFR host according to embodiment 2 of the present invention. Fig. 5 is a flowchart showing a data recovery method of the FFR host according to embodiment 2 of the present invention. Fig. 6 is a flowchart showing the zeroing step of the data recovery method of the FFR host according to embodiment 2 of the present invention. Fig. 7 is a flowchart showing the recovery procedure of the data recovery method of the FFR host according to embodiment 2 of the present invention.

The difference between the data recovery system S2 of the FFR host according to the present embodiment and the data recovery system S1 of the FFR host according to embodiment 1 is that: the data recovery system of the FFR host according to the present embodiment may further include a zeroing module 160. The zeroing module 160 may be used to zero the sensors and periodically poll and record the time stamp and update the zeroing status while writing data to the non-volatile storage module 150.

In this embodiment, the zeroing may be performed by feeding the pressure guide wire into the opening of the guiding catheter, allowing the pressure sensor to just exit the guiding catheter port, and keeping the pressure sensor in a state of being communicated with the atmosphere, so that the pressure signal (Pd) of the pressure guide wire is equal to the pressure signal (Pa) of the aorta.

In this embodiment, the zeroing state may include: zero calibration, zero calibration success and zero calibration failure exist, and when the verification module 110 detects that the zero calibration state is zero calibration and zero calibration success, the check before abnormal shutdown is not completed; when the checking module 110 detects that the zero checking state is zero, the checking is completed before the abnormal shutdown; when the checking module 110 detects that the zeroing status is zero and the zeroing fails, the checking needs to be performed again and the zeroing needs to be performed again. Therefore, the checking module 110 can determine whether to complete the check before the abnormal shutdown through the timestamp and the zero calibration state, so as to automatically determine whether to perform the data recovery operation.

As shown in fig. 6, in this embodiment, the checking module 110 may further include reading and checking the timestamp and the zeroing status from the nonvolatile storage module 150 for determining whether the examination of the patient before the abnormal shutdown is finished. This makes it possible to appropriately perform data recovery, and to reduce the possibility of erroneous recovery.

In this embodiment, the recovery module 120 may also read the sensor zeroing data from the nonvolatile memory module 150 and recover the sensor zeroing. Therefore, the steps and time for re-zeroing after abnormal shutdown can be reduced.

The data recovery method of the FFR master according to the present embodiment further includes a zeroing step (step S160) of aligning the aortic pressure values measured by the two sensors with the atmospheric pressure value by the zeroing sensors, as compared with the data recovery method of the master according to embodiment 1.

In this embodiment, as shown in fig. 6, step S160 may further include periodically polling the update timestamp and the zero calibration status (step S161), and writing the sensor data to the nonvolatile memory module 150 while updating the sensor data (step S162).

In this embodiment, the checking step may further include determining whether data recovery is required (step S170), and if it is determined that data recovery is required, the process proceeds to step S120; if it is determined that recovery is not necessary, the process proceeds to step S130.

In this embodiment, as shown in fig. 7, step S120 may further include reading data from the memory and restoring patient data and sensor data (step S121), and then reading data from the memory and restoring sensor zero calibration (step S122).

In some examples, step 121 may be performed in reverse order of step 122, i.e., the data is read from the memory and the sensor zero calibration is resumed (step S122), and then the data is read from the memory and the patient data and the sensor data are resumed (step S121).

Therefore, the detection accuracy can be improved, whether the recovery step needs to be carried out or not can be automatically judged, and the possibility of error recovery can be further reduced.

While the invention has been specifically described above in connection with the drawings and examples, it will be understood that the above description is not intended to limit the invention in any way. Those skilled in the art can make modifications and variations to the present invention as needed without departing from the true spirit and scope of the invention, and such modifications and variations are within the scope of the invention.

Claims

1. An FFR host with data recovery function is characterized in that,

the method comprises the following steps:

the system comprises a marking module and a control module, wherein the marking module comprises a digital signal generator, the digital signal generator generates a first digital signal when the system is started up and generates a second digital signal when the system is normally shut down, and the first digital signal and the second digital signal are used as shutdown marks of the FFR host;

the nonvolatile storage module is used for storing the shutdown marker, storing the first digital signal as the shutdown marker when the nonvolatile storage module is started up, and storing the second digital signal as the shutdown marker when the nonvolatile storage module is normally shut down;

the monitoring module is used for acquiring real-time data of a patient and writing the real-time data into the nonvolatile storage module, wherein the real-time data comprises sensor data acquired by a pressure sensor and patient data matched with the sensor data;

the check module is used for reading the shutdown marker when the computer is started, judging whether the shutdown marker is in an abnormal shutdown state, when the shutdown marker is the first digital signal, marking the shutdown marker in the abnormal shutdown state, and when the shutdown marker is the second digital signal, marking the shutdown marker in a normal shutdown state;

the recovery module is used for judging whether the real-time data is extracted from the nonvolatile storage module or not based on the shutdown marker, and extracting the real-time data from the nonvolatile storage module when the shutdown marker is in an abnormal shutdown state; and

a zeroing module for zeroing the pressure sensor, and periodically polling and recording a timestamp and updating a zeroing status, and writing to the non-volatile storage module,

wherein the verification module reads and verifies the timestamp and the zeroing status from the non-volatile storage module to determine whether the examination of the patient before the abnormal shutdown is complete.

2. The FFR host of claim 1, wherein:

the first digital signal is "1" and the second digital signal is "0".

3. The FFR host of claim 1, wherein:

the zeroing state comprises: zero calibration, zero calibration not, zero calibration success, and zero calibration failure.

4. The FFR host of claim 1, wherein:

the recovery module further includes reading sensor data from the non-volatile storage module and recovering sensor zeros.

5. The FFR host of claim 1, wherein:

the non-volatile memory module is a programmable program memory (EEPROM).

6. The FFR host of claim 1, wherein:

the patient data includes the patient's ID, age, medical history information.

7. The FFR host of claim 1, wherein:

the pressure sensor measures pressure data of both sides of a diseased end of a patient.

8. The FFR host of claim 1, wherein:

the marking module is also used for reading the shutdown mark recorded at the previous time from the nonvolatile storage module and updating the shutdown mark to the current shutdown mark.

9. The FFR host of claim 1, wherein:

the pressure sensor includes a proximal pressure sensing probe and a distal pressure sensing probe.

10. The FFR host of claim 1, wherein:

the monitoring module further comprises an analog-to-digital converter, and the analog-to-digital converter is used for converting the analog signal acquired by the pressure sensor into a digital signal.