Biphase wave defibrillation system

Abstract

The invention relates to a biphase wave defibrillation system, which comprises a high-voltage module, an H-bridge module, an output module and a control module, and is characterized in that the high-voltage module is connected with the H-bridge module, the H-bridge module is connected with the output module, and the control module is connected with the high-voltage module and the H-bridge module; wherein the upper bridge part and the lower bridge part of the H-bridge module are respectively formed by connecting more than two switch tubes in series. The high-voltage module is used for accessing external power for high-voltage charging and outputting high-voltage power to the H-bridge module, the control module is used for performing on-off switching control on an upper bridge part and a lower bridge part of the H-bridge module, and normal-phase defibrillation energy and reverse-phase defibrillation energy are alternately released through the output module; and the control module also acquires state data of the high-voltage module and the H-bridge module for self-inspection, and controls the H-bridge module to stop defibrillation discharge when a fault is found in self-inspection, so that the use reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a biphasic defibrillator system. Background Art

[0002] Cardiac arrest refers to the sudden cessation of the heart's ejection function, the disappearance of large artery pulsation and heart sounds, and severe ischemia and hypoxia of vital organs, leading to the end of life. This type of sudden cardiac death caused by cardiac arrest is characterized by rapid onset, rapid progression, and severe condition. Although cardiovascular medicine has made significant progress, sudden cardiac death remains a severe challenge to medicine and society. An external defibrillator is a device that applies electrical pulses to the patient's skin (external electrodes) or exposed heart (internal electrodes) through electrodes to achieve electrical defibrillation of the heart. It is used for emergency treatment of patients with ventricular fibrillation, ventricular tachycardia, and suspected cardiac arrest.

[0003] Currently, the devices used for defibrillation mainly include defibrillator monitors and automatic external defibrillators (AEDs) (hereinafter collectively referred to as defibrillators). These devices treat patients by releasing high voltage and high current energy to the human body. The biphasic wave generation circuit used in traditional defibrillators requires the use of foreign high-voltage transistors, which are expensive and have a single supply chain. When a fault occurs, it cannot be repaired in time, and has the disadvantage of low reliability. Summary of the invention

[0004] Based on this, it is necessary to provide a biphasic defibrillator system that can improve the reliability of use in response to the above problems.

[0005] A biphasic defibrillation system comprises a high-voltage module, an H-bridge module, an output module and a control module, wherein the high-voltage module is connected to the H-bridge module, the H-bridge module is connected to the output module, and the control module is connected to the high-voltage module and the H-bridge module; wherein the upper bridge part and the lower bridge part of the H-bridge module are both composed of more than two switch tubes connected in series; The high-voltage module is used to connect to external electricity for high-voltage charging and output high-voltage electricity to the H-bridge module. The control module is used to control the on-off switching of the upper bridge part and the lower bridge part of the H-bridge module, and alternately release the positive phase defibrillation energy and the reverse phase defibrillation energy through the output module; the control module also collects the status data of the high-voltage module and the H-bridge module for self-inspection, and controls the H-bridge module to terminate the defibrillation discharge when a fault is found during the self-inspection.

[0006] In one embodiment, the switch tube in the upper bridge part of the H-bridge module is an SCR (Silicon Controlled Rectifier) ​​tube / IGBT (Insulated Gate Bipolar Transistor) tube, and the switch tube in the lower bridge part of the H-bridge module is an IGBT tube / SCR tube.

[0007] In one embodiment, the high-voltage module includes a high-voltage charging unit and a high-voltage energy storage unit, and the high-voltage energy storage unit is connected to the high-voltage charging unit and the H-bridge module; and / or The output module includes a switching switch, a high-energy resistor and a discharge end. The switching switch connects the H-bridge module, the high-energy resistor and the discharge end. The switching switch is used to transmit energy to the discharge end or the high-energy resistor.

[0008] In one embodiment, the control module includes a parameter acquisition unit, a microprocessor and a drive control unit, the parameter acquisition unit is connected to the high voltage module, the H-bridge module and the microprocessor, and the drive control unit is connected to the H-bridge module and the microprocessor.

[0009] In one embodiment, the drive control unit includes a first type of drive unit for driving the SCR tube, the first type of drive unit includes a control switch, an isolation drive transformer, a first current limiting resistor, a first discharge resistor and a voltage regulator diode, the control end of the control switch is connected to the microprocessor, the first end of the control switch is connected to the first end of the primary winding of the isolation drive transformer, and the second end of the control switch is grounded; the first end of the first current limiting resistor is connected to the power supply end, the second end of the first current limiting resistor is connected to the second end of the primary winding of the isolation drive transformer, the first end of the secondary winding of the isolation drive transformer is connected to the control end of the SCR tube, the second end of the secondary winding of the isolation drive transformer is connected to the output end of the SCR tube, the first discharge resistor and the voltage regulator diode are both connected in parallel with the secondary winding of the isolation drive transformer, and the cathode of the voltage regulator diode is connected to the first end of the secondary winding of the isolation drive transformer.

[0010] In one embodiment, the drive control unit includes a second type of drive unit for driving an IGBT tube, the second type of drive unit includes an optocoupler, a Schottky diode, a second current limiting resistor, a second discharge resistor and a capacitor, the input pin of the optocoupler is connected to the microprocessor, the output pin of the optocoupler is connected to the anode of the Schottky diode, the cathode of the Schottky diode is connected to the first end of the second current limiting resistor, the second end of the second current limiting resistor is connected to the control end of the IGBT tube, the first end of the second discharge resistor and the first end of the capacitor, and the second end of the second discharge resistor and the second end of the capacitor are both connected to the ground pin of the optocoupler.

[0011] In one of the embodiments, the parameter acquisition unit includes a current detection unit and a voltage detection unit, the status data of the high-voltage module includes a high-voltage charging current and a high-voltage charging voltage, and the status data of the H-bridge module includes a reverse defibrillation current, a positive defibrillation current and a half-bridge output voltage.

[0012] In one embodiment, the voltage detection unit includes a voltage-dividing resistor component, a voltage-following unit, a first VF (voltage-frequency) conversion unit, a first optical coupling isolation unit and a first FV (frequency-voltage) conversion unit, the voltage-dividing resistor component is connected to the voltage to be measured, the voltage-following unit is connected to the voltage-dividing resistor component and the first VF conversion unit, the first optical coupling isolation unit is connected to the first VF conversion unit and the first FV conversion unit, and the first FV conversion unit is connected to the microprocessor; and / or The current detection unit includes a detection resistor, a voltage amplification unit, a second VF conversion unit, a second optocoupler isolation unit and a second FV conversion unit. The detection resistor is connected to the current to be measured, the voltage amplification unit is connected to the detection resistor and the second VF conversion unit, the second optocoupler isolation unit is connected to the second VF conversion unit and the second FV conversion unit, and the second FV conversion unit is connected to the microprocessor; the detection resistor is a low-resistance, high-precision, low-temperature drift resistor.

[0013] In one of the embodiments, the microprocessor is used to control the high-voltage module to stop charging and alarm when the detected high-voltage charging current exceeds a set maximum current threshold, and to control the high-voltage module to stop charging and alarm when the detected high-voltage charging voltage exceeds a set maximum voltage threshold.

[0014] In one of the embodiments, the microprocessor is also used to calculate the load impedance during the defibrillation discharge process based on the detected reverse defibrillation current and the positive defibrillation current after the high-voltage module passes the self-test, and if the difference between the load impedance and the set impedance exceeds the impedance error range, control the H-bridge module to terminate the defibrillation discharge, and calculate the actually released defibrillation energy based on the detected half-bridge output voltage, and if the difference between the actually released defibrillation energy and the set defibrillation energy exceeds the energy error range, output a self-test error message.

[0015] In the above-mentioned biphasic defibrillation system, the high-voltage module is connected to external electricity for high-voltage charging, and outputs high-voltage electricity to the H-bridge module. The control module controls the on-off switching of the upper bridge part and the lower bridge part of the H-bridge module, and releases the positive phase defibrillation energy and the reverse phase defibrillation energy alternately through the output module. The upper bridge part and the lower bridge part of the H-bridge module are composed of more than two switch tubes in series, which can reduce the high-voltage resistance requirements of each switch tube and facilitate replacement when a fault occurs. At the same time, the control module also collects the status data of the high-voltage module and the H-bridge module for self-test, and controls the H-bridge module to terminate the defibrillation discharge when a fault is found in the self-test, thereby improving the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural block diagram of a biphasic defibrillation system in one embodiment; Figure 2 A schematic diagram of the structure of a biphasic defibrillator system in one embodiment; Figure 3 is a structural principle diagram of a first type of driving unit in an embodiment; Figure 4 is a structural principle diagram of a second type of driving unit in an embodiment; Figure 5 A defibrillation principle diagram of a biphasic defibrillation system in one embodiment; Figure 6 is a structural principle diagram of a biphasic defibrillator system in another embodiment; Figure 7 is a structural principle diagram of a voltage detection unit in an embodiment; Figure 8 is a structural principle diagram of a current detection unit in an embodiment; Fig. 9 1 is a self-test principle diagram of a biphasic defibrillator system in one embodiment. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0019] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0020] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0021] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0022] In one embodiment, Figure 1 As shown, a biphasic defibrillation system is provided, including a high-voltage module 100, an H-bridge module 200, an output module 300 and a control module 400, wherein the high-voltage module 100 is connected to the H-bridge module 200, the H-bridge module 200 is connected to the output module 300, and the control module 400 is connected to the high-voltage module 100 and the H-bridge module 200; wherein the upper bridge part and the lower bridge part of the H-bridge module 200 are both composed of more than two switch tubes connected in series. The high-voltage module 100 is used to connect to external electricity for high-voltage charging, and output high-voltage electricity to the H-bridge module 200, and the control module 400 is used to switch the upper bridge part and the lower bridge part of the H-bridge module 200 on and off, and alternately release the positive phase defibrillation energy and the reverse phase defibrillation energy through the output module 300; the control module 400 also collects the status data of the high-voltage module 100 and the H-bridge module 200 for self-test, and controls the H-bridge module 200 to terminate the defibrillation discharge when a fault is found in the self-test.

[0023] Specifically, the high-voltage module 100 charges the internal energy storage element after connecting to the external power, and outputs the high-voltage electricity to the H-bridge module 200. The amplitude of the high-voltage electricity output by the high-voltage module 100 is not unique, and can be set according to actual needs. For example, the high-voltage electricity can be a voltage of 2000V-2500V. In this embodiment, the high-voltage module 100 outputs a high-voltage electricity with a peak value of 2200V. The type of each switch tube in the H-bridge module 200 is not unique either. The switch tube in the upper bridge part can be an SCR tube / IGBT tube, and the switch tube in the lower bridge part can be an IGBT tube / SCR tube. Since each bridge arm in the H-bridge is composed of multiple switch tubes in series, the voltage can be well divided to reduce the withstand voltage requirements of each switch tube. Taking the high-voltage module 100 outputting a high-voltage electricity with a peak value of 2200V as an example, if each bridge arm is connected in series with two switch tubes, the withstand voltage of a single switch tube can be reduced by connecting the switch tubes in series. For example, the withstand voltage of a single switch tube only needs to exceed 1100V. By reducing the high-voltage requirements of the switching tube, when the switching tube fails, there is no need to purchase expensive high-voltage transistors from abroad for replacement, thus reducing the cost of use.

[0024] like Figure 2 As shown, the high-voltage module 100 may include a high-voltage charging unit 110 and a high-voltage energy storage unit 120, and the high-voltage energy storage unit 120 connects the high-voltage charging unit 110 and the H-bridge module 200. Among them, the high-voltage energy storage unit 120 can be a high-voltage capacitor or other types of energy storage devices. In this embodiment, the high-voltage energy storage unit 120 uses a high-voltage capacitor with a peak voltage of 2200V. The high-voltage charging unit 110 is connected to both ends of the high-voltage capacitor, and is connected to an external power source to charge the high-voltage capacitor. Specifically, the high-voltage charging unit 110 can charge the high-voltage capacitor after converting the mains power, or it can charge the high-voltage capacitor using an installed battery. By installing the battery for charging, it is convenient to carry a biphasic defibrillator system.

[0025] Furthermore, the output module 300 may include a switching switch 310, a high energy resistor 320 and a discharge end, the switching switch 310 connects the H-bridge module 200, the high energy resistor 320 and the discharge end, and the switching switch 310 is used to deliver energy to the discharge end or the high energy resistor 320. Among them, the switching switch 310 can adopt a control switch such as a relay, or a manual switching switch. By switching the discharge channel by the switching switch 310, it can be discharged to the high energy resistor 320, or discharged to the patient through the discharge end. The high energy resistor 320 is used to simulate the impedance of the human body, and its resistance value can be set according to actual needs. The function of the high energy resistor 320 is circuit self-checking, or discharging the remaining energy of the high voltage capacitor after the defibrillation is completed.

[0026] In one embodiment, continue to refer to Figure 2The control module 400 includes a parameter acquisition unit, a microprocessor 410 and a drive control unit. The parameter acquisition unit is connected to the high-voltage module 100, the H-bridge module 200 and the microprocessor 410, and the drive control unit is connected to the H-bridge module 200 and the microprocessor 410. The state data of the high-voltage module 100 and the H-bridge module 200 are collected by the parameter acquisition unit and sent to the microprocessor 410. The microprocessor 410 sends a control signal to the drive control unit to control the on and off of the switch tubes of each bridge arm in the H-bridge module 200. Further, the microprocessor 410 can also be connected to the high-voltage charging unit 110 in the high-voltage module 100 to control the charging of the high-voltage charging unit 110. In addition, the control module 400 also includes a switching control unit 440, which is connected to the microprocessor 410 and the switching switch 310 in the output module 300. The microprocessor 410 can also send instructions to the switching control unit 440 to control the channel switching of the switching switch 310.

[0027] It can be understood that, depending on the type of switch tube in the H-bridge module 200, the specific structure of the driving control unit may also be different accordingly. Figure 2 As shown, an upper bridge part of the H-bridge module 200 includes a first SCR and a second SCR, and another upper bridge part includes a third SCR and a fourth SCR. A lower bridge part of the H-bridge module 200 includes a first IGBT and a second IGBT, and another lower bridge part includes a third IGBT and a fourth IGBT. After the first SCR and the second SCR are connected in series, one end is connected to the first input end of the H-bridge module 200, and the other end is connected to the first output end of the H-bridge module 200. After the third SCR and the fourth SCR are connected in series, one end is connected to the first input end of the H-bridge module 200, and the other end is connected to the second output end of the H-bridge module 200. After the first IGBT and the second IGBT are connected in series, one end is connected to the first output end of the H-bridge module 200, and the other end is connected to the second input end of the H-bridge module 200. After the third IGBT and the fourth IGBT are connected in series, one end is connected to the second output end of the H-bridge module 200, and the other end is connected to the second input end of the H-bridge module 200. The first input terminal and the second input terminal of the H-bridge module 200 are respectively connected to two ends of the high-voltage energy storage unit 120 , and the first output terminal and the second output terminal of the H-bridge module 200 are connected to the switch 310 .

[0028] Correspondingly, the driving control unit includes a first type driving unit 432 for driving the SCR tube, such as Figure 2As shown, the first type of driving unit 432 includes a first control unit, a second control unit, a third control unit and a fourth control unit. The first type of driving unit 432 may specifically include a control switch, an isolation driving transformer, a first current limiting resistor, a first discharge resistor and a voltage regulator diode. The control end of the control switch is connected to the microprocessor 410, the first end of the control switch is connected to the first end of the primary winding of the isolation driving transformer, and the second end of the control switch is grounded; the first end of the first current limiting resistor is connected to the power supply end, the second end of the first current limiting resistor is connected to the second end of the primary winding of the isolation driving transformer, the first end of the secondary winding of the isolation driving transformer is connected to the control end of the SCR tube, the second end of the secondary winding of the isolation driving transformer is connected to the output end of the SCR tube, the first discharge resistor and the voltage regulator diode are both connected in parallel with the secondary winding of the isolation driving transformer, and the cathode of the voltage regulator diode is connected to the first end of the secondary winding of the isolation driving transformer. Among them, the control switch can specifically adopt a control switch such as a MOS tube, and the first discharge resistor can adopt a fast closing discharge resistor.

[0029] like Figure 3 As shown, SCR1 is the first SCR, whose input end receives the voltage VCAP output by the high-voltage capacitor, and SCR2 is the second SCR, whose input end is connected to the output end of SCR1, and the output end outputs the voltage VO1. The first type of driving unit 432 (specifically the first control unit) connected to the first SCR includes a control switch Q1, an isolation drive transformer T1, a first current limiting resistor R1, a first discharge resistor R2 and a voltage stabilizing diode D1; the first type of driving unit 432 (specifically the second control unit) connected to the second SCR includes a control switch Q2, an isolation drive transformer T2, a first current limiting resistor R3, a first discharge resistor R4 and a voltage stabilizing diode D2. VCC1 is the power supply end, and the control ends of the control switch Q1 and the control switch Q2 are connected to the microprocessor 410 to receive the control signal S1. In this embodiment, the circuit of the upper bridge part of the H-bridge module 200 includes two SCRs connected in series and the corresponding first type of driving unit 432. The microprocessor 410 can simultaneously turn on and off SCR1 and SCR2 by simply sending a control signal S1 , so that one high-voltage 3000V SCR can be replaced by two low-voltage 1500V SCRs.

[0030] Furthermore, the driving control unit also includes a second type driving unit 434 for driving the IGBT tube, such as Figure 2As shown, the second type of driving unit 434 includes a fifth control unit, a sixth control unit, a seventh control unit and an eighth control unit. The second type of driving unit 434 may specifically include an optocoupler, a Schottky diode, a second current limiting resistor, a second discharge resistor and a capacitor, the input pin of the optocoupler is connected to the microprocessor, the output pin of the optocoupler is connected to the anode of the Schottky diode, the cathode of the Schottky diode is connected to the first end of the second current limiting resistor, the second end of the second current limiting resistor is connected to the control end of the IGBT tube, the first end of the second discharge resistor and the first end of the capacitor, and the second end of the second discharge resistor and the second end of the capacitor are both connected to the ground pin of the optocoupler. Among them, the second discharge resistor is a fast closing discharge resistor.

[0031] like Figure 4 As shown, IGBT1 is the first IGBT, whose input end is connected to the voltage VO1 output by the upper bridge, and IGBT2 is the second IGBT, whose input end is connected to the output end of the first IGBT, and whose output end outputs the voltage VO2. The second type of driving unit 434 (specifically the fifth control unit) connected to the first IGBT includes an optocoupler U1, a Schottky diode D3, a second current limiting resistor R5, a second discharge resistor R6 and a capacitor C1, and may further include a resistor R7; the second type of driving unit 434 (specifically the sixth control unit) connected to the second IGBT includes an optocoupler U2, a Schottky diode D4, a second current limiting resistor R8, a second discharge resistor R9 and a capacitor C2, and may further include a resistor R10. In the optocouplers U1 and U2, AN is the input pin of the optocoupler, connected to the microprocessor 410 to receive the control signal S3, VCC is the power pin of the optocoupler, connected to the power terminal VCC1, VO is the output pin of the optocoupler, and GND is the ground pin of the optocoupler. In addition, the GAT pin of the optocoupler U1 is grounded through the resistor R7, and the GAT pin of the optocoupler U2 is grounded through the resistor R10. In this embodiment, the circuit of the lower bridge part of the H-bridge module 200 includes two IGBTs connected in series and a corresponding second type of drive unit 434. Since the switching characteristics of the SCR tube are relatively special, it is not easy to control the closure of the circuit if the lower bridge also adopts SCR series connection, so the lower bridge adopts IGBT series connection. The microprocessor 410 only needs to send a control signal S3 to turn on and off IGBT1 and IGBT2 at the same time, so that two 1500V low-voltage IGBTs can replace a high-voltage 3000V IGBT.

[0032] like Figure 5As shown, when the device needs defibrillation, the four control signals S1, S2, S3 and S4 of the H bridge need to be set low first. The control signal S1 is used to control the first SCR and the second SCR, the control signal S2 is used to control the third SCR and the fourth SCR, the control signal S3 is used to control the first IGBT and the second IGBT, and the control signal S4 is used to control the third IGBT and the fourth IGBT. Then, the control signals S4 and S1 are set high in sequence, and the positive phase defibrillation energy will be released to the patient. After the positive phase time is reached, the control signals S4 and S1 are set low to stop releasing the positive phase defibrillation energy. Then the control signals S3 and S2 are set high again, and the reverse phase defibrillation energy will be released to the patient. After the reverse phase time is reached, the control signals S3 and S2 are set low to stop releasing the reverse phase defibrillation energy, and the entire biphasic wave defibrillation energy release is completed.

[0033] The specific type of the parameter acquisition unit is different depending on the type of status data to be collected. In one embodiment, the parameter acquisition unit includes a current detection unit and a voltage detection unit, and both the current detection unit and the voltage detection unit are connected to the microprocessor 410. The status data of the high-voltage module 100 includes a high-voltage charging current and a high-voltage charging voltage, and the status data of the H-bridge module 200 includes a reverse defibrillation current, a positive defibrillation current and a half-bridge output voltage. Among them, the half-bridge output voltage may include a left half-bridge output voltage and a right half-bridge output voltage. Figure 6 As shown, SCR1 is the first SCR, SCR2 is the second SCR, SCR3 is the third SCR tube, SCR4 is the fourth SCR tube, IGBT1 is the first IGBT, IGBT2 is the second IGBT, IGBT3 is the third IGBT tube, and IGBT4 is the fourth IGBT tube. The current detection unit may include a current detection unit IC1, a current detection unit IC2, and a current detection unit IC3. The current detection unit IC1 is connected to the output end of IGBT1 / IGBT2 to detect the reverse defibrillation current, the current detection unit IC2 is connected to the output end of IGBT3 / IGBT4 to detect the positive defibrillation current, and the current detection unit IC3 is connected to the high-voltage charging unit 110 to detect the high-voltage charging current. The voltage detection unit may include a voltage detection unit VC1, a voltage detection unit VC2 and a voltage detection unit VC3. The voltage detection unit VC1 is connected to the output end of SCR1 / SCR2 to detect the left half-bridge output voltage. The voltage detection unit VC2 is connected to the output end of SCR3 / SCR4 to detect the right half-bridge output voltage. The voltage detection unit VC3 is connected to the high-voltage energy storage unit 120 to detect the high-voltage charging voltage.

[0034] In addition, the parameter acquisition unit may also include a logic detection unit LC1, which connects the microprocessor 410 and the switching switch 310 (specifically a relay) in the output module 300, detects the state of the switching switch 310 and feeds back to the microprocessor 410, so that the microprocessor 410 can detect whether the switching switch 310 is switched successfully.

[0035] The specific structures of the current detection unit and the voltage detection unit are not unique. In one embodiment, Figure 7 As shown, the voltage detection unit includes a voltage-dividing resistor component 421, a voltage following unit 422, a first VF conversion unit 423, a first optical coupling isolation unit 424 and a first FV conversion unit 425. The voltage-dividing resistor component 421 is connected to the voltage to be measured VC1, the voltage following unit 422 is connected to the voltage-dividing resistor component 421 and the first VF conversion unit 423, the first optical coupling isolation unit 424 is connected to the first VF conversion unit 423 and the first FV conversion unit 425, and the first FV conversion unit 425 is connected to the microprocessor 410. Among them, the voltage-dividing resistor component 421 includes a resistor R11 and a resistor R12, and the common end of the resistor R11 and the resistor R12 is connected in series to the voltage following unit 422, the other end of the resistor R11 is connected to the voltage to be measured VC1, and the other end of the resistor R12 is grounded.

[0036] Since the voltage to be measured is as high as 2200V, it needs to be divided by resistors R11 and R12 to within 3.3V, and then input to the voltage follower unit 422, which can improve the input impedance and improve the accuracy of the voltage division. Since the entire system needs to be isolated from high and low voltages, the signal output by the voltage follower unit 422 cannot be directly input to the microprocessor 410, so the first VF conversion unit 423 is used to convert the voltage signal into a PWM signal, and then the first optical coupling isolation unit 424 is used for isolation, and finally the first FV conversion unit 425 is used to convert the PWM signal into a voltage signal and then send it to the ADC (analog-to-digital converter) inside the microprocessor for data conversion.

[0037] Furthermore, if Figure 8 As shown, the current detection unit may include a detection resistor R13, a voltage amplification unit 426, a second VF conversion unit 427, a second optocoupler isolation unit 428 and a second FV conversion unit 429, the detection resistor R13 is connected to the current IC1 to be measured, the voltage amplification unit 426 is connected to the detection resistor R13 and the second VF conversion unit 427, the second optocoupler isolation unit 428 is connected to the second VF conversion unit 427 and the second FV conversion unit 429, and the second FV conversion unit 429 is connected to the microprocessor 410.

[0038] Among them, one end of the detection resistor R13 is connected to the voltage amplifier unit 426 and connected to the current to be measured IC1, and the other end is grounded. Since the current to be measured is as high as 100A, the detection resistor R13 uses a low-resistance, high-precision, low-temperature drift resistor, and then performs voltage amplification through the voltage amplifier unit 426. Since the entire system needs to be isolated from high voltage and low voltage, the voltage signal cannot be directly input to the microprocessor 410, so the second VF conversion unit 427 is used to convert the voltage signal into a PWM signal, and then the second optical coupling isolation unit 428 is used for isolation, and finally the second FV conversion unit 429 is used to convert the PWM signal into a voltage signal and then send it to the internal ADC of the microprocessor for data conversion.

[0039] The microprocessor 410 can automatically collect status data for self-test under set conditions. The set conditions may include each time a battery is inserted, each time the device is turned on, each time a defibrillation treatment is performed, each weekly self-test, each monthly self-test, etc., to ensure that the system can operate normally in all aspects.

[0040] In one embodiment, the microprocessor 410 is used to control the high-voltage module 100 to stop charging and alarm when the detected high-voltage charging current exceeds the set maximum current threshold, and to control the high-voltage module 100 to stop charging and alarm when the detected high-voltage charging voltage exceeds the set maximum voltage threshold. The values ​​of the set maximum current threshold and the set maximum voltage threshold are not unique and can be set according to actual conditions. Fig. 9 As shown, after starting the self-check, the high-voltage charging is first self-checked. The high-voltage charging current IC3 detects the real-time current during the charging process. When it exceeds the set maximum current threshold, the charging will stop and an alarm will be sounded; the high-voltage charging voltage VC3 detects the real-time voltage during the charging process. When the voltage exceeds the set maximum voltage threshold, the charging will stop and an alarm will be sounded. If both the high-voltage charging current and the high-voltage charging voltage are normal, the high-voltage capacitor will continue to be charged until the voltage of the high-voltage capacitor reaches the preset target voltage, and the high-voltage charging is completed. After the high-voltage module 100 passes the self-check, the H-bridge module 200 will be self-checked. After turning on the positive phase defibrillator, the positive phase current IC1 detection and the left half-bridge output voltage VC1 detection are performed. If the current or voltage detection fails, the defibrillator discharge is terminated and an alarm is sounded; after turning on the reverse phase defibrillator, the reverse phase current IC2 detection and the right half-bridge output voltage VC2 detection are performed. If the current or voltage detection fails, the defibrillator discharge is terminated and an alarm is sounded.

[0041] Furthermore, the microprocessor 410 is also used to calculate the load impedance during the defibrillation discharge process based on the detected reverse defibrillation current and the positive defibrillation current after the high-voltage module 100 passes the self-test, and if the difference between the load impedance and the set impedance exceeds the impedance error range, control the H-bridge module 200 to terminate the defibrillation discharge, and calculate the actually released defibrillation energy based on the detected half-bridge output voltage, and if the difference between the actually released defibrillation energy and the set defibrillation energy exceeds the energy error range, output a self-test error message.

[0042] Among them, the values ​​of the set impedance, impedance error range, set defibrillation energy and energy error range can be set according to actual conditions. For example, the set impedance can be set to the impedance measured by the transthoracic impedance system. When the H-bridge module 200 is self-checked, the real-time load current during the defibrillation discharge process can be detected according to the detection of the positive current IC1 and the reverse current IC2, and then the load impedance is calculated in combination with the output voltage. If the calculated load impedance is significantly different from the set impedance, it indicates that the SCR or IGBT of the H-bridge is in a semi-conducting state and may be damaged, then the defibrillation discharge of the H-bridge module 200 is terminated immediately. The positive phase defibrillation discharge start and end voltage V1 is obtained by detecting the left half-bridge output voltage VC1, and the reverse phase defibrillation discharge start and end voltage V2 is obtained by detecting the right half-bridge output voltage VC2. The actual released defibrillation energy E can be calculated using formula 1, and C is the capacitance value of the high-voltage capacitor.

[0043] Formula 1 Then compare the defibrillation energy E with the set defibrillation energy. If it exceeds the error range, a self-check error will be reported.

[0044] By collecting the status data of the high-voltage module 100 and the H-bridge module 200 for self-inspection, the operating status of the biphasic defibrillator system can be effectively detected, system failures can be discovered in time and early warnings can be issued, thereby ensuring the reliability of the biphasic defibrillator system.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A biphasic defibrillator system, characterized in that: It includes a high-voltage module, an H-bridge module, an output module and a control module, wherein the high-voltage module is connected to the H-bridge module, the H-bridge module is connected to the output module, and the control module is connected to the high-voltage module and the H-bridge module; wherein the upper bridge part and the lower bridge part of the H-bridge module are both composed of more than two switch tubes connected in series; The high-voltage module is used to connect to external electricity for high-voltage charging and output high-voltage electricity to the H-bridge module. The control module is used to control the on-off switching of the upper bridge part and the lower bridge part of the H-bridge module, and alternately release the positive phase defibrillation energy and the reverse phase defibrillation energy through the output module; the control module also collects the status data of the high-voltage module and the H-bridge module for self-inspection, and controls the H-bridge module to terminate the defibrillation discharge when a fault is found during the self-inspection.

2. The biphasic defibrillator system according to claim 1, characterized in that: The switch tube in the upper bridge part of the H-bridge module is an SCR tube / IGBT tube, and the switch tube in the lower bridge part of the H-bridge module is an IGBT tube / SCR tube.

3. The biphasic defibrillator system according to claim 1, characterized in that: The high-voltage module includes a high-voltage charging unit and a high-voltage energy storage unit, and the high-voltage energy storage unit is connected to the high-voltage charging unit and the H-bridge module; and / or The output module includes a switching switch, a high-energy resistor and a discharge end. The switching switch connects the H-bridge module, the high-energy resistor and the discharge end. The switching switch is used to transmit energy to the discharge end or the high-energy resistor.

4. The biphasic defibrillator system according to any one of claims 1 to 3, characterized in that: The control module includes a parameter acquisition unit, a microprocessor and a drive control unit. The parameter acquisition unit is connected to the high voltage module, the H-bridge module and the microprocessor. The drive control unit is connected to the H-bridge module and the microprocessor.

5. The biphasic defibrillator system according to claim 4, characterized in that: The drive control unit includes a first type of drive unit for driving the SCR tube, the first type of drive unit includes a control switch, an isolation drive transformer, a first current limiting resistor, a first discharge resistor and a voltage regulator diode, the control end of the control switch is connected to the microprocessor, the first end of the control switch is connected to the first end of the primary winding of the isolation drive transformer, and the second end of the control switch is grounded; the first end of the first current limiting resistor is connected to the power supply end, the second end of the first current limiting resistor is connected to the second end of the primary winding of the isolation drive transformer, the first end of the secondary winding of the isolation drive transformer is connected to the control end of the SCR tube, the second end of the secondary winding of the isolation drive transformer is connected to the output end of the SCR tube, the first discharge resistor and the voltage regulator diode are both connected in parallel with the secondary winding of the isolation drive transformer, and the cathode of the voltage regulator diode is connected to the first end of the secondary winding of the isolation drive transformer.

6. The biphasic defibrillator system according to claim 4, characterized in that: The drive control unit includes a second type of drive unit for driving an IGBT tube, the second type of drive unit includes an optocoupler, a Schottky diode, a second current limiting resistor, a second discharge resistor and a capacitor, an input pin of the optocoupler is connected to the microprocessor, an output pin of the optocoupler is connected to the anode of the Schottky diode, a cathode of the Schottky diode is connected to the first end of the second current limiting resistor, a second end of the second current limiting resistor is connected to the control end of the IGBT tube, a first end of the second discharge resistor and a first end of the capacitor, and a second end of the second discharge resistor and a second end of the capacitor are both connected to the ground pin of the optocoupler.

7. The biphasic defibrillator system according to claim 4, characterized in that: The parameter acquisition unit includes a current detection unit and a voltage detection unit, the status data of the high-voltage module includes a high-voltage charging current and a high-voltage charging voltage, and the status data of the H-bridge module includes a reverse defibrillation current, a positive defibrillation current and a half-bridge output voltage.

8. The biphasic defibrillator system according to claim 7, characterized in that: The voltage detection unit includes a voltage-dividing resistor component, a voltage-following unit, a first VF conversion unit, a first optical coupling isolation unit and a first FV conversion unit, the voltage-dividing resistor component is connected to the voltage to be measured, the voltage-following unit is connected to the voltage-dividing resistor component and the first VF conversion unit, the first optical coupling isolation unit is connected to the first VF conversion unit and the first FV conversion unit, and the first FV conversion unit is connected to the microprocessor; and / or The current detection unit includes a detection resistor, a voltage amplification unit, a second VF conversion unit, a second optocoupler isolation unit and a second FV conversion unit. The detection resistor is connected to the current to be measured, the voltage amplification unit is connected to the detection resistor and the second VF conversion unit, the second optocoupler isolation unit is connected to the second VF conversion unit and the second FV conversion unit, and the second FV conversion unit is connected to the microprocessor; the detection resistor is a low-resistance, high-precision, low-temperature drift resistor.

9. The biphasic defibrillator system according to claim 7, characterized in that: The microprocessor is used to control the high-voltage module to stop charging and alarm when the detected high-voltage charging current exceeds a set maximum current threshold, and to control the high-voltage module to stop charging and alarm when the detected high-voltage charging voltage exceeds a set maximum voltage threshold.

10. The biphasic defibrillator system according to claim 9, characterized in that: The microprocessor is also used to calculate the load impedance during the defibrillation discharge process based on the detected reverse defibrillation current and the positive defibrillation current after the high-voltage module passes the self-test, and if the difference between the load impedance and the set impedance exceeds the impedance error range, control the H-bridge module to terminate the defibrillation discharge, and calculate the actually released defibrillation energy based on the detected half-bridge output voltage, and if the difference between the actually released defibrillation energy and the set defibrillation energy exceeds the energy error range, output a self-test error message.

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