Defibrillation protection system applied to IABP

Abstract

The embodiment of the utility model provides a defibrillation protection system applied to IABP, and relates to the technical field of medical instruments.The system comprises an electrocardiosignal input module, a first-stage defibrillation circuit, a second-stage defibrillation circuit and an electrocardiosignal output module, the output end of the electrocardiosignal input module is connected with the input end of the first-stage defibrillation circuit; the output end of the first-stage defibrillation circuit is connected with the input end of the second-stage defibrillation circuit; the output end of the second-stage defibrillation circuit is connected with the electrocardiosignal output module, and electrocardiosignals output by the electrocardiosignal output module are transmitted to the control module of the IABP host; the first-stage defibrillation circuit is used for eliminating defibrillation energy; and the second-stage defibrillation circuit is used for protecting transient voltage interference. By applying the system provided by the embodiment of the invention, the interference influence of defibrillation high voltage on the IABP system is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a defibrillation protection system applied to IABP. BACKGROUND

[0002] IABP (Intra-Aortic Balloon Counterpulsation) is a medical device used to support heart function and improve hemodynamics. Cardiovascular monitoring and diagnostic devices of this type must meet the requirements of defibrillation protection to avoid the interference of high-voltage defibrillation on the IABP system. CONTENT OF THE INVENTION

[0003] The purpose of the embodiments of the present application is to provide a defibrillation protection system applied to IABP to avoid the interference of high-voltage defibrillation on the IABP system. The specific technical solutions are as follows:

[0004] In a first aspect, the embodiments of the present application provide a defibrillation protection system applied to IABP, which comprises an electrocardiosignal input module, a first-stage defibrillation circuit, a second-stage defibrillation circuit, an electrocardiosignal output module, wherein:

[0005] The input end of the electrocardiosignal input module is connected with an electrocardiosignal lead wire, and the output end of the electrocardiosignal input module is connected with the input end of the first-stage defibrillation circuit; the output end of the first-stage defibrillation circuit is connected with the input end of the second-stage defibrillation circuit; and the output end of the second-stage defibrillation circuit is connected with the electrocardiosignal output module, and the electrocardiosignal output by the electrocardiosignal output module is transmitted to the control module of an IABP host;

[0006] The first-stage defibrillation circuit is used for eliminating defibrillation energy, and the second-stage defibrillation circuit is used for protecting against transient voltage interference.

[0007] In an embodiment of the present application, the first-stage defibrillation circuit comprises a first resistor R1, a second resistor R2, and an air discharge diode TV, wherein:

[0008] One end of the first resistor R1 is connected with the electrocardiosignal input module, and the other end is respectively connected with one end of the second resistor R2 and one end of the air discharge diode TV; the other end of the air discharge diode TV is connected with a floating ground; and the other end of the second resistor R2 is connected with the input end of the second-stage defibrillation circuit.

[0009] In an embodiment of the present application, the first resistor R1 is a ceramic plug-in resistor.

[0010] In one embodiment of the present application, the first resistor R1 has a resistance value between [1kΩ, 1.2kΩ], and the second resistor R2 has a resistance value between [3.9kΩ, 4kΩ].

[0011] In one embodiment of the present application, the air discharge diode TV has a direct current breakdown voltage between [80V, 100V] and a pulse discharge current between [4kA, 6kA].

[0012] In one embodiment of the present application, the second-stage defibrillation circuit includes a third resistor R3, a fourth resistor R4, and a TVS tube TVS, wherein:

[0013] One end of the third resistor R3 is connected to the output end of the first-stage defibrillation circuit, and the other end is respectively connected to one end of the fourth resistor R4 and one end of the TVS tube TVS.

[0014] The other end of the fourth resistor R4 is connected to the electrocardiosignal output module, and the other end of the TVS tube TVS is grounded.

[0015] In one embodiment of the present application, the third resistor R3 and the fourth resistor R4 have the same resistance value.

[0016] In one embodiment of the present application, the input end of the defibrillation protection system is connected to an electrocardiosignal lead line, and the other end is connected to an IABP host, wherein:

[0017] The electrocardiosignal lead line collects the electrocardiosignal of a patient and inputs the electrocardiosignal to the defibrillation protection system, the defibrillation protection system performs voltage reduction processing on the electrocardiosignal to obtain a processed signal, and the processed signal is input to the IABP host.

[0018] As can be seen from the above, the system provided by the embodiments of the present application includes two continuous defibrillation circuits, wherein the first-stage defibrillation circuit eliminates defibrillation energy, and the second-stage defibrillation circuit protects against transient voltage interference. Therefore, through the two continuous defibrillation circuits, not only is the defibrillation energy effectively eliminated, but also voltage interference is prevented, so that rapid and effective defibrillation protection is achieved, and the defibrillation protection performance applied to IABP is significantly improved.

[0019] Of course, implementing any product or method of the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other embodiments can also be obtained by those skilled in the art based on these drawings.

[0021] Figure 1 An application scenario schematic diagram provided by the embodiments of the present application;

[0022] Figure 2 A structure schematic diagram of a defibrillation protection system applied to IABP provided by the embodiments of the present application;

[0023] Figure 3 A structure schematic diagram of a defibrillation protection system applied to IABP provided by the embodiments of the present application;

[0024] Figure 4 A structure schematic diagram of a defibrillation protection system applied to IABP provided by the embodiments of the present application;

[0025] Figure 5 A structure schematic diagram of a defibrillation protection system applied to IABP provided by the embodiments of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some 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 based on the present application belong to the scope of protection of the present application.

[0027] Firstly, the application scenario of the embodiments of the present application will be described.

[0028] The defibrillation protection system provided by the embodiments of the present application is applied to an IABP system, and the IABP system includes an IABP and an IABP host. The traditional scheme usually adopts a single protection device, and it is difficult to quickly and efficiently realize defibrillation protection by using such a scheme.

[0029] In an embodiment of the present application, the defibrillation protection system can be integrated into a mainboard in the IABP host, and the IABP system realizes the defibrillation protection function through the defibrillation protection system integrated in the IABP host.

[0030] In another embodiment of the present application, the defibrillation protection system can also be an independent module independent of the IABP host, and the defibrillation protection system realizes defibrillation protection by connecting the IABP host and the electrocardio signal lead wire. The structure schematic diagram of the present embodiment is shown in Figure 1, including IABP host 11, defibrillation protection system 12, ECG lead 13, IABP 14.

[0031] ECG lead 13 collects the ECG signal of the patient and inputs the ECG signal to the defibrillation protection system 12, the defibrillation protection system 12 performs voltage reduction processing on the ECG signal to obtain a processing signal, and the processing signal is input to the IABP host 11, and the IABP host 11 controls the IABP to operate through the processing signal.

[0032] It can be seen that the defibrillation protection system in this embodiment is an independent module independent of the IABP host, and the above-mentioned defibrillation protection system can be compatible with other single-lead or multi-lead devices, effectively improving the utilization rate of the system.

[0033] The scheme provided by the embodiment of the application will be described below.

[0034] Referring to Figure 2 , Figure 2 The first defibrillation protection system for IABP provided by the embodiment of the application is shown in the structural diagram, and the system includes an ECG signal input module 21, a first defibrillation circuit 22, a second defibrillation circuit 23, and an ECG signal output module 24, wherein:

[0035] The input end of the ECG signal input module 21 is connected to the ECG lead, and the output end of the ECG signal input module 21 is connected to the input end of the first defibrillation circuit 22; the output end of the first defibrillation circuit 22 is connected to the input end of the second defibrillation circuit 23; the output end of the second defibrillation circuit 23 is connected to the ECG signal output module 24, and the ECG signal output by the ECG signal output module 24 is transmitted to the control module of the IABP host.

[0036] One end of the ECG lead is attached to the surface of the patient's skin for detecting the ECG signal of the patient, and the other end is connected to the ECG signal input module 21, and the ECG signal input module 21 can obtain the collected ECG signal through the ECG lead.

[0037] The first defibrillation circuit 22 is used to eliminate defibrillation energy, and the second defibrillation circuit 23 is used to protect against transient voltage interference.

[0038] As can be seen from the above, the system provided by the embodiment includes two continuous defibrillation circuits, wherein the first defibrillation circuit eliminates defibrillation energy, and the second defibrillation circuit protects against transient voltage interference. Therefore, through the above-mentioned two continuous defibrillation circuits, not only the defibrillation energy is effectively eliminated, but also the voltage interference is protected, thereby realizing rapid and effective defibrillation protection and significantly improving the defibrillation protection performance applied to the IABP.

[0039] Referring to Figure 3 ,Figure 3 The second defibrillation protection system structure applied to IABP provided by the embodiment of the present application is shown in the figure. The system comprises an ECG signal input module 31, a first defibrillation circuit 32, a second defibrillation circuit 33, and an ECG signal output module 34, wherein:

[0040] The input end of the ECG signal input module 31 is connected with an ECG lead wire, and the output end of the ECG signal input module 31 is connected with the input end of the first defibrillation circuit 32. The output end of the first defibrillation circuit 32 is connected with the input end of the second defibrillation circuit 33. The output end of the second defibrillation circuit 33 is connected with the ECG signal output module 34, and the ECG signal output by the ECG signal output module 34 is transmitted to an IABP host. The first defibrillation circuit 32 is used for eliminating defibrillation energy. The second defibrillation circuit 33 is used for protecting against transient voltage interference.

[0041] The above content is the same as that in the foregoing Figure 1 , which will not be described here again.

[0042] In the embodiment, the first defibrillation circuit 32 comprises a first resistor R1, a second resistor R2, and an air discharge diode TV, wherein:

[0043] One end of the first resistor R1 is connected with the ECG signal input module 31, and the other end thereof is respectively connected with one end of the second resistor R2 and one end of the air discharge diode TV. The other end of the air discharge diode TV is connected with a floating ground. The other end of the second resistor R2 is connected with the input end of the second defibrillation circuit 33.

[0044] The air discharge diode has a high surge current processing capacity and an arc voltage almost independent of the circuit, which short-circuits the overvoltage of the input part and effectively protects the subsequent circuit. When the discharge ends, the air discharge diode is extinguished, and it has a very low PF level junction capacity, which has almost no effect on the subsequent circuit.

[0045] In addition, the air discharge diode and the ground layer are connected in series after the ECG signal input module, which can realize the voltage resistance processing of the ECG application part. Experimental test data proves that 4kV voltage resistance processing can be realized.

[0046] In addition, the first resistor and the second resistor can intercept defibrillation energy to protect the subsequent circuit. The residual voltage after the protection of the air discharge diode is added to the second resistor through voltage division, which will not damage the second resistor and will not affect signal recognition. Therefore, through the structure of the series resistor, the air discharge diode, and the ground layer, the defibrillation energy and the influence caused by the energy can be effectively eliminated.

[0047] Therefore, in the embodiment, the first defibrillation circuit adopts the circuit structure, and can effectively eliminate the defibrillation energy and resist long-time high voltage.

[0048] In an embodiment of the present application, the first resistor R1 is a ceramic plug-in resistor. Since the ceramic resistor has stronger current bearing capacity and voltage resistance, better defibrillation protection effect can be achieved through the first resistor.

[0049] In an embodiment of the present application, the resistance value of the first resistor R1 is between [1kΩ, 1.2kΩ], and the resistance value of the second resistor R2 is between [3.9kΩ, 4kΩ]. For example, the resistance value of the first resistor R1 can be 1kΩ, 1.1kΩ or 1.2kΩ, and the resistance value of the second resistor R2 can be 3.9kΩ or 4kΩ.

[0050] In an embodiment of the present application, the direct current breakdown voltage of the air discharge diode TV is between [80V, 100V], and the pulse discharge current is between [4kA, 6kA]. For example, the direct current breakdown voltage is 80V, 90V or 100V, and the pulse discharge current is 4kA, 5kA or 6kA.

[0051] The air discharge diode is connected to the floating ground, which is a current discharge path of the air discharge diode under high voltage. In an embodiment, the air discharge diode can also be connected to the device protection ground through a 10MΩ resistor, so that the charge is slowly discharged to the ground through the protection ground after the discharge tube discharges the current at the end of high voltage, ensuring the safety of the device.

[0052] Referring to Figure 4 , Figure 4 A third defibrillation protection system structure diagram applied to IABP is provided in the embodiment of the present application. The system includes an electrocardiosignal input module 41, a first defibrillation circuit 42, a second defibrillation circuit 43, an electrocardiosignal output module 44, and the like, wherein:

[0053] The input end of the electrocardiosignal input module 41 is connected to the electrocardiosignal lead wire, and the output end of the electrocardiosignal input module 41 is connected to the input end of the first defibrillation circuit 42. The output end of the first defibrillation circuit 42 is connected to the input end of the second defibrillation circuit 43. The output end of the second defibrillation circuit 43 is connected to the electrocardiosignal output module 44. The electrocardiosignal output by the electrocardiosignal output module 44 is transmitted to the IABP host. The first defibrillation circuit 42 is used to eliminate the defibrillation energy. The second defibrillation circuit 43 is used to protect against transient voltage interference.

[0054] The above content is the same as that in the foregoing Figure 1 , which will not be described here again.

[0055] In the embodiment, the second-stage defibrillation circuit 43 comprises a third resistor R3, a fourth resistor R4 and a TVS tube TVS, wherein one end of the third resistor R3 is connected with the output end of the first-stage defibrillation circuit 42, and the other end of the third resistor R3 is connected with one end of the fourth resistor R4 and one end of the TVS tube TVS respectively; the other end of the fourth resistor R4 is connected with the electrocardiosignal output module 44, and the other end of the TVS tube TVS is grounded.

[0056] It can be seen that the TVS tube can rapidly respond to the short and rapid pulse voltage due to the extremely fast response speed of the TVS tube, which is in the order of ps, so as to protect the circuit and realize the rapid response to the transient voltage change. In addition, the TVS tube presents capacitance and inductance, and the structure forms a filter circuit, which has a certain filtering effect on signal noise. Therefore, the structure of the TVS tube connected in the middle of the two series resistors can effectively protect the transient voltage interference.

[0057] In one embodiment of the present application, the third resistor R3 and the fourth resistor R4 have the same resistance value. The resistance value of the third resistor R3 and the fourth resistor R4 can be between [495Ω, 505Ω], such as 495Ω, 499Ω, 505Ω, etc.

[0058] The defibrillation protection system provided by the embodiment of the present application is specifically introduced below with one specific embodiment. Referring to Figure 5 , Figure 5 The fourth defibrillation protection system for IABP provided by the embodiment of the present application is shown in the structure diagram, which comprises an electrocardiosignal input module 51, a first-stage defibrillation circuit 52, a second-stage defibrillation circuit 53, and an electrocardiosignal output module 54, wherein:

[0059] The input end of the electrocardiosignal input module 51 is connected with the electrocardiosignal lead wire, and the output end of the electrocardiosignal input module 51 is connected with the input end of the first-stage defibrillation circuit 52; the output end of the first-stage defibrillation circuit 52 is connected with the input end of the second-stage defibrillation circuit 53; and the output end of the second-stage defibrillation circuit 53 is connected with the electrocardiosignal output module 54, and the electrocardiosignal output by the electrocardiosignal output module 54 is transmitted to the IABP host;

[0060] The first-stage defibrillation circuit 52 comprises a first resistor R1, a second resistor R2 and an air discharge diode TV, wherein one end of the first resistor R1 is connected with the electrocardiosignal input module 51, and the other end of the first resistor R1 is connected with one end of the second resistor R2 and one end of the air discharge diode TV respectively; the other end of the air discharge diode TV is connected with the floating ground; and the other end of the second resistor R2 is connected with the input end of the second-stage defibrillation circuit 53.

[0061] The second-stage defibrillation circuit 53 comprises a third resistor R3, a fourth resistor R4 and a TVS tube TVS, wherein one end of the third resistor R3 is connected with the output end of the first-stage defibrillation circuit 52, and the other end of the third resistor R3 is connected with one end of the fourth resistor R4 and one end of the TVS tube TVS respectively; the other end of the fourth resistor R4 is connected with the electrocardiosignal output module 54, and the other end of the TVS tube TVS is grounded.

[0062] It can be seen that, since the air discharge diode can bear higher surge current, but the limited voltage is high when the current is large, and the size of the impact current that can be tolerated decreases with the increase of the impact times, and it is more prone to aging, through the TVS tube in the post-stage circuit, the above-mentioned shortcomings can be avoided, and the circuit is quickly reflected under the short and rapid pulse voltage, and the circuit is protected. In summary, the defibrillation protection circuit structure provided by the embodiment can effectively eliminate the defibrillation energy, resist long-time high voltage, and prevent transient voltage interference.

[0063] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the term "coupled" is used herein to express a relationship between or among multiple elements. Such a relationship can be a physical or logical relationship, and such a relationship can or can not be direct.

[0064] The above only describes the preferred embodiments of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A defibrillation protection system for use in IABP, characterized in that, The system includes an electrocardiogram (ECG) signal input module, a first-stage defibrillation circuit, a second-stage defibrillation circuit, and an ECG signal output module, wherein: The input terminal of the ECG signal input module is connected to the ECG signal lead wire, and the output terminal of the ECG signal input module is connected to the input terminal of the first-stage defibrillation circuit; the output terminal of the first-stage defibrillation circuit is connected to the input terminal of the second-stage defibrillation circuit; the output terminal of the second-stage defibrillation circuit is connected to the ECG signal output module, and the ECG signal output by the ECG signal output module is transmitted to the control module of the IABP host. The first-stage defibrillation circuit is used to eliminate defibrillation energy; the second-stage defibrillation circuit is used to protect against transient voltage interference.

2. The system according to claim 1, characterized in that, The first-stage defibrillation circuit includes a first resistor (R1), a second resistor (R2), and an air discharge diode (TV), wherein: One end of the first resistor (R1) is connected to the ECG signal input module, and the other end is connected to one end of the second resistor (R2) and one end of the air discharge diode (TV); the other end of the air discharge diode (TV) is connected to floating ground; the other end of the second resistor (R2) is connected to the input terminal of the second-stage defibrillation circuit.

3. The system according to claim 2, characterized in that, The first resistor (R1) is a ceramic plug-in resistor.

4. The system according to claim 2, characterized in that, The resistance of the first resistor (R1) is between [1kΩ, 1.2kΩ], and the resistance of the second resistor (R2) is between [3.9kΩ, 4kΩ].

5. The system according to claim 2, characterized in that, The DC breakdown voltage of the air discharge diode (TV) is between [80V, 100V], and the pulse discharge current is between [4kA, 6kA].

6. The system according to claim 1, characterized in that, The second-stage defibrillator circuit includes a third resistor (R3), a fourth resistor (R4), and a TVS diode (TVS), wherein: One end of the third resistor (R3) is connected to the output terminal of the first-stage defibrillation circuit, and the other end is connected to one end of the fourth resistor (R4) and one end of the TVS tube (TVS); The other end of the fourth resistor (R4) is connected to the electrocardiogram signal output module, and the other end of the TVS tube (TVS) is grounded.

7. The system according to claim 6, characterized in that, The third resistor (R3) and the fourth resistor (R4) have the same resistance value.

8. The system according to any one of claims 1-7, characterized in that, The input end of the defibrillation protection system is connected to the electrocardiogram signal lead wire, and the other end is connected to the IABP host, wherein: The ECG signal lead acquires the patient's ECG signal and inputs the ECG signal into the defibrillation protection system. The defibrillation protection system performs voltage reduction processing on the ECG signal to obtain a processed signal, which is then input into the IABP host.

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