Shock wave generator for cardiovascular stenosis lesions

Abstract

The application relates to a shock wave generating device for cardiovascular stenosis lesions, which comprises a balloon catheter and an energy supply unit, the balloon catheter comprises an electrode pair arranged in the balloon and electrically connected with the energy supply unit, the energy supply unit is provided with a release state detection circuit for detecting the energy release state between the electrodes of the electrode pair, at least one of which comprises a pulse voltage detection circuit for detecting the voltage between the electrodes of the electrode pair at the discharge moment, a resistance detection circuit for detecting the resistance between the electrodes of the electrode pair, the pulse power supply is connected to the electrode pair, a switch is arranged to control the duration of the pulse circuit provided to the electrode pair, and the pulse voltage detection circuit and the resistance detection circuit are arranged on the electrode pair and the switch to detect the sudden change of the voltage and the resistance between the electrodes of the electrode pair after the energy is released, the switch is controlled to be turned on and turned off, and unnecessary energy waste is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to an impact wave generating device for cardiovascular stenosis. BACKGROUND

[0002] Cardiovascular stenosis refers to the deposition of lipid in the inner membrane of the smooth blood vessels due to abnormal lipid metabolism, which gradually accumulates into a lipid plaque, and with time, the plaque increases and even calcifies, causing stenosis of the blood vessel lumen, blocking blood flow, and leading to ischemia of the downstream blood vessels and the body, resulting in corresponding clinical manifestations. If the stenosis occurs in the coronary artery, it can cause palpitations, chest pain, dyspnea, and angina pectoris, and in severe cases, it can lead to myocardial ischemia or myocardial necrosis. If it occurs in the periphery, it can cause a decrease in skin temperature, muscle atrophy, and intermittent claudication, even leading to necrosis or amputation of the distal extremities. If it occurs in the intracranial, it can cause dizziness, syncope, and even brain damage and brain dysfunction.

[0003] To solve the problem of blood vessel injury caused by simple high-pressure balloon pre-expansion, such as dissection, blood vessel stress fracture, and broken hole, a device capable of generating shock waves has appeared, which reshapes and reopens the atherosclerotic or calcified lesions of the stenosis lesion. This method generates shock waves by emitting ultrasound into a balloon filled with fluid medium, forming cavitation bubbles at the electrode, and then generating shock waves, which impact the calcified area to crush the calcified lesions.

[0004] For example, the disclosed Chinese patent CN104619272B9 adopts an energy-controlled shock wave catheter system, which includes a catheter containing a first electrode and a second electrode, the first electrode and the second electrode are arranged to receive a high voltage at an initial low current therebetween. The high voltage forms an electric arc between the electrodes, generates gas bubbles in the fluid, a large current flowing through the electrodes, and a mechanical shock wave. The power supply provides a high voltage at an initial current to the electrodes and terminates the high voltage in response to the large current flowing through the electrodes. The patent controls the energy applied to the electrodes of the electric arc shock wave generator by measuring the change in current passing between the electrodes. However, it is found in actual use that the stability of a single current detection is poor, and once the current detection circuit fails, the normal completion of the detection control cannot be ensured. SUMMARY

[0005] The purpose of the present application is to provide an impact wave generating device for cardiovascular stenosis, which provides a new structure for controlling the energy release of the electrode pair by detecting the voltage and resistance between the electrode pair.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is:

[0007] The application discloses a shock wave generating device for cardiovascular stenosis, which comprises a balloon catheter, an energy supply unit, wherein the balloon catheter comprises a catheter main body, a balloon connected to the catheter main body and an electrode pair comprising a first electrode and a second electrode, the electrode pair is arranged in the balloon and is electrically connected with the energy supply unit, the energy supply unit is provided with a release state detection circuit for detecting the energy release state between the first electrode and the second electrode, the release state detection circuit comprises at least one of a pulse voltage detection circuit and a resistance detection circuit, the pulse voltage detection circuit is used for detecting the voltage between the first electrode and the second electrode at the moment of discharge, and the resistance detection circuit is used for detecting the resistance between the first electrode and the second electrode at the moment of discharge, the first end of the electrode pair is connected with a pulse power supply, the second end is connected with the first end of a switch, the second end of the switch is grounded, when the pulse voltage detection circuit is arranged, the pulse voltage detection circuit is connected to the first end of the electrode pair and the second end of the switch, and when the resistance detection circuit is arranged, the resistance detection circuit is connected to the second end of the electrode pair and the second end of the switch.

[0008] Preferably, the pulse voltage detection circuit comprises a voltage dividing module, an operational amplifier and a on-off controller, the voltage dividing module has an input end, an output end and a ground end, the operational amplifier has a positive input end, a negative input end and an output end, the input end of the voltage dividing module is connected with the first end of the electrode pair, the ground end is grounded, and the output end is connected with the positive input end of the operational amplifier, the negative input end of the operational amplifier is grounded, and the output end is connected with the on-off controller.

[0009] Preferably, the pulse voltage detection circuit comprises a voltage dividing module, a comparator, an off circuit and a on-off controller, the voltage dividing module has an input end, an output end and a ground end, the comparator has a positive input end, a negative input end and an output end, the input end of the voltage dividing module is connected with the first end of the electrode pair, the ground end is grounded, and the output end is connected with the positive input end of the comparator, the negative input end of the comparator is connected with a Vref power supply, and the output end is connected with the on-off controller, and the first end of the off circuit is connected with the output end of the comparator, and the second end is connected with the contact of the switch.

[0010] Further preferably, the release state detection circuit further comprises a first resistance and / or a second resistance, the first end of the first resistance is connected with the output end of the comparator, and the second end is connected with the negative input end of the comparator, and the first end of the second resistance is grounded, and the second end is connected with the negative input end of the comparator.

[0011] Further preferably, the pulse voltage detection circuit further comprises a capacitor, a first end of the capacitor being connected with the output end of the voltage division module, and a second end of the capacitor being grounded.

[0012] Preferably, the resistance detection circuit comprises a voltage signal source, a voltage division module, an operational amplifier, a capacitor, and a on-off controller, the voltage division module having an input end, an output end, and a ground end, the operational amplifier having a positive input end, a negative input end, and an output end, a first end of the voltage signal source being connected with a first end of the electrode pair, and a second end of the voltage signal source being connected with a first end of the switch, a first end of the capacitor being connected with a second end of the electrode pair, and a second end of the capacitor being connected with the input end of the voltage division module, the ground end of the voltage division module being grounded, the output end of the voltage division module being connected with the positive input end of the operational amplifier, the negative input end of the operational amplifier being grounded, and the output end of the operational amplifier being connected with the on-off controller.

[0013] Further preferably, the voltage division module comprises a voltage sensor, an input end of the voltage sensor being the input end of the voltage division module, an output end of the voltage sensor being the output end of the voltage division module, and a ground end of the voltage sensor being the ground end of the voltage division module.

[0014] Further preferably, the voltage division module comprises a third resistor and a fourth resistor connected in series, a first end of the third resistor being the input end of the voltage division module, a second end of the third resistor being connected with a first end of the fourth resistor, a second end of the third resistor being the output end of the voltage division module, and a second end of the fourth resistor being the ground end of the voltage division module.

[0015] Further preferably, the release state detection circuit further comprises a diode, a positive electrode of the diode being grounded, and a negative electrode of the diode being connected with the output end of the voltage division module.

[0016] More preferably, the diode is a Schottky diode.

[0017] Further preferably, the release state detection circuit further comprises a first resistor and / or a second resistor, a first end of the first resistor being connected with the output end of the operational amplifier, and a second end of the first resistor being connected with the negative input end of the operational amplifier, and a first end of the second resistor being grounded, and a second end of the second resistor being connected with the negative input end of the operational amplifier.

[0018] Preferably, the release state detection circuit further comprises a fifth resistor, a first end of the fifth resistor being connected with the second end of the electrode pair, and a second end of the fifth resistor being connected with the first end of the switch.

[0019] Due to the above technical scheme, the present application has the following advantages compared with the prior art:

[0020] The present application connects the pulse power to the electrode pair, sets the switch to control the duration of the pulse circuit provided to the electrode pair, sets the pulse voltage detection circuit and the resistance detection circuit on the electrode pair and the switch to detect the sudden change of the voltage and resistance between the electrode pair after the energy is released, controls the on-off of the switch, and saves unnecessary energy waste.

[0021] The voltage detection circuit and the resistance detection circuit have simple circuit structure, stable and high detection, and can select any one of the two to detect and judge, so that when one detection circuit fails, the other detection circuit can ensure the completion of the whole detection process. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a schematic diagram of the voltage and current waveforms of the electrode pair in the embodiment; Figure 1

[0023] Fig. 2 is a circuit diagram of the voltage division module of the first form circuit in the embodiment using a current sensor; Figure 2

[0024] Fig. 3 is a circuit diagram of the voltage division module of the first form circuit in the embodiment using a third resistor and a fourth resistor in series; Figure 3

[0025] Fig. 4 is a circuit diagram of the voltage division module of the second form circuit in the embodiment using a current sensor; Figure 4

[0026] Fig. 5 is a circuit diagram of the voltage division module of the second form circuit in the embodiment using a third resistor and a fourth resistor in series; Figure 5

[0027] Fig. 6 is a circuit diagram of the voltage division module of the resistance detection circuit in the embodiment using a current sensor; Figure 6

[0028] Fig. 7 is a circuit diagram of the voltage division module of the resistance detection circuit in the embodiment using a third resistor and a fourth resistor in series; Figure 7

[0029] Fig. 8 is a flow chart of the on-off of the switch of the pulse voltage detection circuit in the embodiment; Figure 8

[0030] Fig. 9 is a flow chart of the on-off of the switch of the resistance detection circuit in the embodiment. Figure 9

[0031] ​​​​​​​​​In the above drawings: 1, electrode pair; 2, switch; 31, pulse power supply; 32, Vref power supply; 33, voltage signal source; 4, on-off controller; 42, off circuit; 5, voltage sensor; 6, capacitor; 7, diode; 81, operational amplifier; 82, comparator; 91, first resistor; 92, second resistor; 93, third resistor; 94, fourth resistor; 95, fifth resistor. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] As Figures 2-7As shown, a shock wave generating device for cardiovascular stenosis lesions includes a balloon catheter, an energy supply unit, the balloon catheter includes a catheter body, a balloon connected to the catheter body, and an electrode pair 1, the electrode pair 1 is arranged in the balloon and electrically connected with the energy supply unit, the energy supply unit can emit and regulate ultrasonic waves of a specific frequency in the balloon filled with liquid medium so that the electrode pair 1 forms cavitation bubbles and generates shock waves. The energy supply unit provides a pulse power source 31 with a voltage of 300V-20000V, the pulse width is adjustable, the adjustment range is 10ns to 100ms, a switch 2 is connected on the electrode pair 1, the switch 2 is a controllable switch for high voltage, including IGBT, MOS tube, thyristor, relay, etc., the energy supply unit also has an on-off controller 41, which can control the on-off of the switch 2. The electrode pair 1 includes a first electrode and a second electrode, the electrode pair 1 connected with the pulse power source 31 can form an electric arc between the first electrode and the second electrode, the electric arc forms cavitation bubbles and then forms shock waves, and the switch 2 can accumulate and release energy of the electrode pair 1, the energy accumulation has a maximum value, the control switch 2 has a delay time when it is turned off, the discharge instruction can be sent in advance, the high voltage applied to the electrode pair 1 can be stopped when the energy reaches the peak value, and the electrode can be protected and the service life can be prolonged.

[0036] The energy supply unit is also provided with a release state detection circuit, which is used to detect the energy release state between the first electrode and the second electrode, and the release state detection circuit includes at least one of a pulse voltage detection circuit and a resistance detection circuit, the pulse voltage detection circuit is used to detect the voltage between the first electrode and the second electrode at the discharge moment; the resistance detection circuit is used to detect the resistance between the first electrode and the second electrode at the discharge moment, the first end of the electrode pair 1 is connected with the pulse power source 31, the second end of the electrode pair 1 is connected with the first end of the switch 2, the second end of the switch 2 is grounded, the pulse voltage detection circuit is connected to the first end of the electrode pair 1 and the second end of the switch 2; the resistance detection circuit is connected to the second end of the electrode pair 1 and the second end of the switch 2.

[0037] As Figure 1As shown, it is the waveform diagram of voltage (A) changing with time when the catheter electrode discharges, high voltage pulse is loaded on the electrode pair 1, 10ns-10ms later, the discharge breaks through the conductive liquid, the current reaches hundreds of amperes in nanosecond level, the voltage between the first electrode and the second electrode drops sharply, and the resistance between the first electrode and the second electrode drops sharply. Through detecting the discharge voltage and the resistance drop value, the release state detection circuit can be used to control the discharge pulse width, and finally realize the control of the release energy. The pulse voltage detection circuit can detect the released voltage by using a voltage transformer or a voltage sampling resistor, etc. The voltage will drop sharply at the moment of electrode discharge, and the pulse width is controlled according to the voltage drop, and finally the release energy control is realized. The resistance detection circuit increases a high-frequency voltage signal and analyzes it through a voltage dividing resistor, the resistance between the electrodes will drop sharply at the moment of electrode discharge, and the pulse width is controlled according to the resistance drop, and finally the release energy control is realized. The pulse voltage detection circuit and the resistance detection circuit are described in detail below.

[0038] Embodiment one:

[0039] The first form circuit of the pulse voltage detection circuit:

[0040] As shown in Figure 2 , 3 , the first form circuit includes a voltage dividing module, an operational amplifier 81 and a on-off controller 41, the voltage dividing module has an input end, an output end and a ground end, the operational amplifier 81 has a positive input end, a negative input end and an output end, the input end of the voltage dividing module is connected with the first end of the electrode pair 1, the ground end is grounded, and the output end is connected with the positive input end of the operational amplifier 81, the negative input end of the operational amplifier 81 is grounded, and the output end is connected with the on-off controller 41, the first form circuit divides voltage through the voltage dividing module between the pulse power supply 31, then adjusts the voltage through the operational amplifier 81, finally inputs the voltage value into the on-off controller 41 for analysis and makes a decision on whether to turn on or off.

[0041] The second form circuit of the pulse voltage detection circuit:

[0042] As shown in Figure 4 , 5As shown in the second form of the circuit, the second form of the circuit includes a voltage dividing module, a comparator 82, an off circuit 42 and a on-off controller 41, the voltage dividing module has an input end, an output end and a ground end, the comparator 82 has a positive input end, a negative input end and an output end, the input end of the voltage dividing module is connected with the first end of the electrode pair 1, the ground end is grounded, the output end is connected with the positive input end of the comparator 82, the negative input end of the comparator 82 is connected with the Vref power supply 32, and the output end is connected with the on-off controller 41, the first end of the off circuit 42 is connected with the output end of the comparator 82, and the second end is connected with the contact of the switch 2. The second form of the circuit also provides a voltage dividing module, and a comparator 82 and a Vref power supply 32 are provided, the Vref power supply 32 can provide a reference voltage, the voltage of which is irrelevant to the load, power supply, temperature drift, time and the like, and can remain constant at all times, the voltage dividing value of the voltage dividing module is compared with the set value of the Vref power supply 32 through the comparator 82, and then the switch 2 is directly disconnected through the off circuit 42.

[0043] As shown in the first form of the circuit, the pulse voltage detection circuit further includes an operational amplifier 81, the first end of the operational amplifier 81 is connected with the output end of the voltage dividing module, and the second end is connected with the negative input end of the operational amplifier 81. Figures 2-5 As shown in the second form of the circuit, the pulse voltage detection circuit further includes a diode 7, the positive electrode of the diode 7 is grounded, and the negative electrode is connected with the output end of the voltage dividing module, the diode 7 plays a protection role when the voltage dividing voltage of the voltage dividing module is too large, preventing overvoltage from damaging the subsequent operational amplifier 81 or comparator 82 and the like, and the diode 7 is a Schottky diode.

[0044] The pulse voltage detection circuit further includes a first resistor 91 and / or a second resistor 92, in the first form of the circuit, the first end of the first resistor 91 is connected with the output end of the operational amplifier 81, and the second end is connected with the negative input end of the operational amplifier 81; the first end of the second resistor 92 is grounded, and the second end is connected with the negative input end of the operational amplifier 81, as shown in the first form of the circuit. Figure 2 , 3 As shown in the second form of the circuit, the first end of the first resistor 91 is connected with the output end of the comparator 82, and the second end is connected with the negative input end of the comparator 82; the first end of the second resistor 92 is grounded, and the second end is connected with the negative input end of the comparator 82, as shown in the second form of the circuit. Figure 4 , 5 .

[0045] The voltage dividing module in the above two forms of the circuit can adopt one of a voltage sensor 5 or series-connected third and fourth resistors 93 and 94, when the voltage sensor 5 is adopted, the input end of the voltage sensor 5 is the input end of the voltage dividing module, the output end of the voltage sensor 5 is the output end of the voltage dividing module, and the ground end of the voltage sensor 5 is the ground end of the voltage dividing module, as shown in the first form of the circuit. Figure 2 , 4When a third resistor 93 and a fourth resistor 94 are connected in series, the first end of the third resistor 93 is the input end of the voltage divider module, the second end of the third resistor 93 is connected to the first end of the fourth resistor 94, the second end of the third resistor 93 is the output end of the voltage divider module, and the second end of the fourth resistor 94 is the ground end of the voltage divider module. Figure 3 、 5 shown.

[0046] like Figures 2-5 As shown, the pulse voltage detection circuit further includes a fifth resistor 95 , a first end of the fifth resistor 95 is connected to the second end of the electrode pair 1 , and a second end of the fifth resistor 95 is connected to the first end of the switch 2 .

[0047] like Figure 8 As shown, the working principle of the pulse voltage detection circuit is as follows: the electrode pair 1 is connected in series with the switch 2, the electrode discharge is controlled by the switch 2, and the voltage is divided by the voltage divider module. After the voltage is divided, it is adjusted by the operational amplifier 81 and sent to the on-off controller 41. After the on-off controller 41 detects the voltage drop, it delays for a certain time to turn off the pulse, thereby controlling the frequency and duty cycle of the pulse release, and finally realizing the release energy control. When the voltage value drops by more than 100V, the switch 2 is turned off with a delay of 50ns, thereby controlling the frequency and duty cycle of the pulse release, and finally realizing the release energy control. The voltage divided value after voltage division and the set value of the Vref power supply 32 can also be compared by the comparator 82. When the voltage value drops by more than 100V, the switch 2 is turned off with a delay of 50ns. The high-voltage switch 2 is directly turned off by the hardware circuit of the shutdown circuit 42, which can make the shutdown response more sensitive.

[0048] Example 2:

[0049] like Figure 6 、 7 As shown, the resistance detection circuit includes a voltage signal source 33, a voltage divider module, an operational amplifier 81, a capacitor 6, and an on-off controller 41. The voltage divider module has an input terminal, an output terminal, and a ground terminal. The operational amplifier 81 has a positive input terminal, a negative input terminal, and an output terminal. The first end of the voltage signal source 33 is connected to the first end of the electrode pair 1, and the second end is connected to the first end of the switch 2. The first end of the capacitor 6 is connected to the second end of the electrode pair 1, and the second end is connected to the input terminal of the voltage divider module. The ground terminal of the voltage divider module is grounded, and the output terminal is connected to the positive input terminal of the operational amplifier 81. The negative input terminal of the operational amplifier 81 is grounded, and the output terminal is connected to the on-off controller 41. The voltage signal source 33 provides a high-frequency voltage signal with a frequency range of 10Hz~1MHz and a voltage amplitude of 1V-1000V.

[0050] The resistance detection circuit also includes a diode 7, the positive electrode of which is grounded and the negative electrode is connected to the output end of the voltage divider module. When the divided voltage of the voltage divider module is too large, the diode 7 plays a protective role to prevent overvoltage from damaging the subsequent operational amplifier 81 or comparator 82 and other circuits. The diode 7 is a Schottky diode.

[0051] The resistance detection circuit also includes a first resistor 91 and / or a second resistor 92, wherein the first end of the first resistor 91 is connected to the output end of the operational amplifier 81, and the second end is connected to the negative input end of the operational amplifier 81; the first end of the second resistor 92 is grounded, and the second end of the second resistor 92 is connected to the negative input end of the operational amplifier 81.

[0052] The voltage divider module in the resistance detection circuit can adopt a voltage sensor 5 or one of the third resistor 93 and the fourth resistor 94 connected in series. When the voltage sensor 5 is adopted, the input end of the voltage sensor 5 is the input end of the voltage divider module, the output end of the voltage sensor 5 is the output end of the voltage divider module, and the ground end of the voltage sensor 5 is the ground end of the voltage divider module. Figure 6 When a third resistor 93 and a fourth resistor 94 are connected in series, the first end of the third resistor 93 is the input end of the voltage divider module, the second end of the third resistor 93 is connected to the first end of the fourth resistor 94, the second end of the third resistor 93 is the output end of the voltage divider module, and the second end of the fourth resistor 94 is the ground end of the voltage divider module. Figure 7 shown.

[0053] like Figure 6 、 7 As shown, the resistance detection circuit further includes a fifth resistor 95, a first end of which is connected to the second end of electrode pair 1, and a second end of which is connected to the first end of switch 2. Fifth resistor 95 in the resistance detection circuit is a voltage divider resistor with a resistance range of 0.001mΩ-10kΩ. After switch 2 is turned on, when electrode pair 1 is not broken down, the electrode resistance range is 1kΩ-100kΩ; when electrode pair 1 is broken down and discharged, the resistance range is 10-500Ω.

[0054] like Figure 9As shown, the working principle of the resistance detection circuit is that the electrode pair 1, the fifth resistance 95 and the switch 2 are connected in series, the electrode discharge is controlled through the switch 2, the high-frequency voltage signal given by the voltage signal source 33 is superimposed on the high-voltage pulse of the pulse power supply 31, and then loaded on the electrode pair 1 and the fifth resistance 95, and then detected through the capacitor 6, and then sent to the on-off controller 41 after being adjusted by the operational amplifier 81, the resistance value between the electrode pair 1 is measured, the resistance before the discharge breakdown is above 1KΩ, and the resistance after the breakdown is below 100Ω, when the resistance value is detected to be sharply reduced, the switch 2 is turned off after a certain time delay, when the resistance is analyzed to be reduced by more than 10Ω, the switch 2 is turned off after a delay of 50ns, so as to control the frequency and duty cycle of the pulse release, and finally realize the release energy control.

[0055] Embodiment three:

[0056] When the pulse voltage detection circuit and the resistance detection circuit exist at the same time, the pulse voltage detection circuit is connected to the first end of the electrode pair 1 and the second end of the switch 2, and the resistance detection circuit is connected to the second end of the electrode pair 1 and the second end of the switch 2, so as to select any one of the detection circuits for shock wave detection. And when one kind of circuit fails, the detection can still be realized through another kind of detection circuit, so as to ensure the normal control of the shock wave.

[0057] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A shock wave generating device for treating cardiovascular stenosis, comprising a balloon catheter and an energy supply unit, wherein the balloon catheter comprises a catheter body, a balloon connected to the catheter body, and an electrode pair, wherein the electrode pair comprises a first electrode and a second electrode, the electrode pair being disposed within the balloon and electrically connected to the energy supply unit, the energy supply unit being provided with a release state detection circuit for detecting an energy release state between the first electrode and the second electrode, and wherein: The release state detection circuit includes a pulse voltage detection circuit and a resistance detection circuit. The pulse voltage detection circuit is used to detect the voltage between the first electrode and the second electrode at the moment of discharge; the resistance detection circuit is used to detect the resistance between the first electrode and the second electrode at the moment of discharge. The first end of the electrode pair is connected to the pulse power supply, the second end is connected to the first end of the switch, and the second end of the switch is grounded. The pulse voltage detection circuit is connected to the first end of the electrode pair and the second end of the switch; the resistance detection circuit is connected to the second end of the electrode pair and the second end of the switch. The resistance detection circuit includes a voltage signal source, a voltage divider module, an operational amplifier, a capacitor and an on-off controller. The voltage divider module has an input An input terminal, an output terminal and a ground terminal, the operational amplifier has a positive input terminal, a negative input terminal and an output terminal, the first end of the voltage signal source is connected to the first end of the electrode pair, and the second end is connected to the first end of the switch, the first end of the capacitor is connected to the second end of the electrode pair, and the second end is connected to the input terminal of the voltage divider module, the ground terminal of the voltage divider module is grounded, and the output terminal is connected to the positive input terminal of the operational amplifier, the negative input terminal of the operational amplifier is grounded, and the output terminal is connected to the on-off controller, by selecting any one detection circuit to perform shock wave detection, and when one circuit fails, detection can still be achieved through another detection circuit to ensure normal control of the shock wave.

2. The shock wave generating device for treating cardiovascular stenosis according to claim 1, characterized in that: The pulse voltage detection circuit includes a voltage divider module, an operational amplifier and an on-off controller. The voltage divider module has an input end, an output end and a ground end. The operational amplifier has a positive input end, a negative input end and an output end. The input end of the voltage divider module is connected to the first end of the electrode pair, the ground end is grounded, and the output end is connected to the positive input end of the operational amplifier. The negative input end of the operational amplifier is grounded, and the output end is connected to the on-off controller.

3. The shock wave generating device for treating cardiovascular stenosis according to claim 1, characterized in that: The pulse voltage detection circuit includes a voltage divider module, a comparator, a shutdown circuit and an on-off controller. The voltage divider module has an input end, an output end and a ground end. The comparator has a positive input end, a negative input end and an output end. The input end of the voltage divider module is connected to the first end of the electrode pair, the ground end is grounded, and the output end is connected to the positive input end of the comparator. The negative input end of the comparator is connected to the Vref power supply, and the output end is connected to the on-off controller. The first end of the shutdown circuit is connected to the output end of the comparator, and the second end is connected to the contact of the switch.

4. The shock wave generating device for treating cardiovascular stenosis according to claim 3, characterized in that: The release state detection circuit also includes a first resistor and / or a second resistor, the first end of the first resistor is connected to the output end of the comparator, and the second end is connected to the negative input end of the comparator; the first end of the second resistor is grounded, and the second end of the second resistor is connected to the negative input end of the comparator.

5. The shock wave generating device for treating cardiovascular stenosis according to claim 2 or 3, characterized in that: The pulse voltage detection circuit further comprises a capacitor, a first end of which is connected to the output end of the voltage divider module and a second end of which is grounded.

6. The shock wave generating device for treating cardiovascular stenosis according to claim 2 or 3, characterized in that: The voltage divider module includes a voltage sensor, the input end of the voltage sensor is the input end of the voltage divider module, the output end of the voltage sensor is the output end of the voltage divider module, and the ground end of the voltage sensor is the ground end of the voltage divider module.

7. The shock wave generating device for treating cardiovascular stenosis according to claim 2 or 3, characterized in that: The voltage divider module includes a third resistor and a fourth resistor connected in series, the first end of the third resistor is the input end of the voltage divider module, the second end of the third resistor is connected to the first end of the fourth resistor, the second end of the third resistor is the output end of the voltage divider module, and the second end of the fourth resistor is the ground end of the voltage divider module.

8. The shock wave generating device for treating cardiovascular stenosis according to claim 2 or 3, characterized in that: The release state detection circuit further includes a diode, the positive electrode of the diode is grounded, and the negative electrode is connected to the output end of the voltage divider module.

9. The shock wave generating device for treating cardiovascular stenosis according to claim 8, characterized in that: The diode is a Schottky diode.

10. The shock wave generating device for treating cardiovascular stenosis according to claim 2, characterized in that: The release state detection circuit also includes a first resistor and / or a second resistor, wherein the first end of the first resistor is connected to the output end of the operational amplifier and the second end is connected to the negative input end of the operational amplifier; the first end of the second resistor is grounded and the second end is connected to the negative input end of the operational amplifier.

11. The shock wave generating device for treating cardiovascular stenosis according to claim 1, characterized in that: The release state detection circuit further includes a fifth resistor, a first end of the fifth resistor being connected to the second end of the electrode pair, and a second end of the fifth resistor being connected to the first end of the switch.

Images