CN216167809U - Electrode contact quality detection circuit and high-frequency electrotome - Google Patents
Electrode contact quality detection circuit and high-frequency electrotome Download PDFInfo
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- CN216167809U CN216167809U CN202122112597.7U CN202122112597U CN216167809U CN 216167809 U CN216167809 U CN 216167809U CN 202122112597 U CN202122112597 U CN 202122112597U CN 216167809 U CN216167809 U CN 216167809U
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- 210000001519 tissue Anatomy 0.000 description 5
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Abstract
The utility model discloses an electrode contact quality detection circuit and a high-frequency electrotome, wherein the electrode contact quality detection circuit comprises a driving module, a detection module, a prompt module and an MCU (microprogrammed control unit), the driving module comprises a voltage input interface and a voltage output interface, the voltage input interface is connected with a high-frequency power supply, and the voltage output interface is connected with a cutter head, so that the driving module can control the conduction state between the voltage input interface and the voltage output interface; the detection module is provided with a detection interface connected with the neutral electrode, the detection module can detect the contact resistance of the neutral electrode, the contact quality of the neutral electrode can be known by detecting the contact resistance of the neutral electrode, and the driving module is controlled to disconnect the connection between the voltage input interface and the voltage output interface under the condition of poor contact quality, so that a patient can be prevented from being injured.
Description
Technical Field
The utility model relates to the technical field of circuit testing, in particular to an electrode contact quality detection circuit and a high-frequency electrotome.
Background
A high-frequency electric knife is an electric surgical instrument for replacing a mechanical scalpel to cut tissues. The tissue is heated when the high-frequency high-voltage current generated by the tip of the effective electrode contacts with the body, so that the separation and coagulation of the body tissue are realized, and the purposes of cutting and hemostasis are achieved. Since the nerve and muscle no longer respond to the current after the current frequency exceeds 100KHz, the high-frequency electric knife usually uses the high-frequency current exceeding 200KHz, and in order to prevent the high-frequency current from leaving the patient and returning to the high-frequency electric knife, and then continuing to heat the tissue and burn the patient, the neutral electrode is needed to form a current loop.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an electrode contact quality detection circuit which can detect whether a neutral electrode is in good contact with a patient or not, so that the patient is prevented from being injured, and the safety and the stability are improved.
The embodiment of the first aspect of the utility model provides an electrode contact quality detection circuit, which is applied to a high-frequency electric knife, wherein the high-frequency electric knife comprises a high-frequency power supply, a neutral electrode and a knife head, and the electrode contact quality detection circuit comprises:
the driving module comprises a voltage input interface and a voltage output interface, the voltage input interface is used for being connected with the high-frequency power supply, the voltage output interface is used for being connected with the cutter head, and the driving module is used for controlling the conducting state of the voltage input interface and the voltage output interface;
the detection module is provided with a detection interface used for being connected with the neutral electrode and used for detecting the contact resistance of the neutral electrode;
the prompting module is used for sending out a prompt to remind a user of the detection condition of the detection module;
and the MCU is used for controlling the driving module and the prompting module to work according to the contact resistance measured by the detection module.
The electrode contact quality detection circuit provided by the embodiment of the utility model has at least the following beneficial effects:
the electrode contact quality detection circuit comprises a driving module, a detection module, a prompt module and an MCU (microprogrammed control unit), wherein the driving module comprises a voltage input interface and a voltage output interface, the voltage input interface is connected with a high-frequency power supply, and the voltage output interface is connected with a cutter head, so that the driving module can control the conduction state between the voltage input interface and the voltage output interface; the detection module is provided with the detection interface who is connected with neutral electrode, the detection module can detect neutral electrode's contact resistance, because when neutral electrode and patient contact failure, neutral electrode's contact resistance can grow, consequently can learn through the contact resistance who detects neutral electrode whether with patient good contact, can control drive module disconnection voltage input interface and voltage output interface between the condition of neutral electrode and patient contact failure and be connected, thereby prevent that the patient is injured, in addition, through setting up the suggestion module, can indicate the user under neutral electrode and patient contact failure's condition, with the security that improves. In summary, the electrode contact quality detection circuit of the embodiment of the utility model can detect whether the neutral electrode is in good contact with the patient, thereby avoiding the patient from being injured and improving the safety and stability.
According to some embodiments of the present invention, the detection module includes a self-oscillation circuit for generating a voltage signal according to the contact resistance, and a dc conversion circuit for processing the voltage signal, an input terminal of the self-oscillation circuit is connected to the detection interface, an output terminal of the self-oscillation circuit is connected to an input terminal of the dc conversion circuit, and an output terminal of the dc conversion circuit is connected to the MCU.
According to some embodiments of the utility model, the dc conversion circuit comprises a dc converter, an input of which is connected to an output of the self-oscillating circuit.
According to some embodiments of the utility model, the dc conversion circuit further comprises a voltage follower, an input end of the voltage follower is connected with an output end of the dc converter, and an output end of the voltage follower is connected with the MCU.
According to some embodiments of the present invention, the driving module includes a driving chip for boosting voltage, and a relay for controlling a conduction state of the voltage output interface of the voltage input interface, an input end of the driving chip is connected to the MCU, and an output end of the driving chip is connected to the relay.
According to some embodiments of the present invention, the driving module further includes a pull-down resistor, one end of the pull-down resistor is grounded, and the other end of the pull-down resistor is connected to the input end of the driving chip.
According to some embodiments of the utility model, the prompt module comprises a prompt audio circuit for emitting an alarm sound, the prompt audio circuit being connected to the MCU.
According to some embodiments of the utility model, the prompting module comprises an alarm indicator light circuit for emitting alarm light, and the alarm indicator light circuit is connected with the MCU.
According to some embodiments of the utility model, the alarm indication lamp circuit comprises a plurality of light emitting assemblies, the output end of each light emitting assembly is connected with the MCU, and the input end of each light emitting assembly is connected with a 5V power supply.
In a second embodiment of the utility model, there is provided a high frequency electrotome comprising an electrode contact quality detection circuit as in the first embodiment.
The high-frequency electrotome according to the second aspect of the present invention has all the technical improvements and technical effects of the electrode contact quality detection circuit according to the first aspect of the present invention, which are not described herein again.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the structural connections of an electrode contact quality detection circuit according to some embodiments of the present invention;
FIG. 2 is a schematic diagram of the structure of a detection module of the electrode contact quality detection circuit of some embodiments of the present invention;
FIG. 3 is a schematic diagram of the MCU and reset circuit of the electrode contact quality detection circuit of some embodiments of the present invention;
FIG. 4 is a schematic diagram of the structure of the drive module of the electrode contact quality detection circuit of some embodiments of the present invention;
FIG. 5 is a schematic diagram of the structure of the cue audio circuit of the electrode contact quality detection circuit of some embodiments of the present invention;
fig. 6 is a schematic diagram of the alarm indicator circuit of the electrode contact quality detection circuit of some embodiments of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The electrode contact quality detection circuit is applied to a high-frequency electrotome, the high-frequency electrotome comprises a high-frequency power supply, a neutral electrode and a cutter head, the electrode contact quality detection circuit comprises a driving module, a detection module, a prompt module and an MCU (microprogrammed control unit), the driving module comprises a voltage input interface and a voltage output interface, the voltage input interface is connected with the high-frequency power supply, and the voltage output interface is connected with the cutter head, so that the driving module can control the conduction state between the voltage input interface and the voltage output interface; the detection module is provided with the detection interface who is connected with neutral electrode, the detection module can detect neutral electrode's contact resistance, because when neutral electrode and patient contact failure, neutral electrode's contact resistance can grow, consequently can learn through the contact resistance who detects neutral electrode whether with patient good contact, can control drive module disconnection voltage input interface and voltage output interface between the condition of neutral electrode and patient contact failure and be connected, thereby prevent that the patient is injured, in addition, through setting up the suggestion module, can indicate the user under neutral electrode and patient contact failure's condition, with the security that improves. In summary, the electrode contact quality detection circuit of the embodiment of the utility model can detect whether the neutral electrode is in good contact with the patient, thereby avoiding the patient from being injured and improving the safety and stability.
The embodiments of the present invention will be further explained with reference to the drawings.
The utility model provides an electrode contact quality detection circuit.
With reference to fig. 1, it can be understood that the electrode contact quality detection circuit includes a driving module, a detection module, a prompt module and an MCU, the MCU is respectively connected to the driving module, the detection module and the prompt module, and the MCU is configured to control the driving module and the prompt module to operate according to the contact resistance measured by the detection module.
It can be understood that the driving module comprises a voltage input interface and a voltage output interface, the voltage input interface is used for connecting a high-frequency power supply, the voltage output interface is used for connecting the cutter head, and the driving module is used for controlling the conducting state of the voltage input interface and the voltage output interface; the detection module is provided with a detection interface used for being connected with the neutral electrode, and the detection module is used for detecting the contact resistance of the neutral electrode; the prompting module is used for sending out a prompt to remind a user of the detection condition of the detection module; the MCU is respectively connected with the driving module, the detection module and the prompt module and is used for controlling the driving module and the prompt module to work according to the contact resistance measured by the detection module.
It can be understood that, because when the neutral electrode is in poor contact with the patient, the contact resistance of the neutral electrode can become large, whether the neutral electrode is in good contact with the patient can be known by detecting the contact resistance of the neutral electrode, the driving module can be controlled to disconnect the connection between the voltage input interface and the voltage output interface under the condition of poor contact between the neutral electrode and the patient, so that the patient is prevented from being injured, and in addition, by arranging the prompting module, a user can be prompted under the condition of poor contact between the neutral electrode and the patient, so that the safety is improved. In summary, the electrode contact quality detection circuit of the embodiment of the utility model can detect whether the neutral electrode is in good contact with the patient, thereby avoiding the patient from being injured and improving the safety and stability.
It can be understood that the detection module comprises a self-oscillation circuit for generating a voltage signal according to the contact resistance, and a direct current conversion circuit for processing the voltage signal, wherein an input end of the self-oscillation circuit is connected with the detection interface, an output end of the self-oscillation circuit is connected with an input end of the direct current conversion circuit, and an output end of the direct current conversion circuit is connected with the MCU.
Specifically, the self-oscillation circuit is a three-point self-oscillation circuit.
The contact resistance refers to resistance generated by contact and conduction with a human body when the neutral electrode is attached to the human body, and the larger the contact area between the neutral electrode and the human body, the better the contact between the neutral electrode and the human body, and the smaller the contact resistance, and conversely, the smaller the contact area between the neutral electrode and the human body, the worse the contact between the neutral electrode and the human body, and the larger the contact resistance.
With reference to fig. 2, it can be understood that the three-point self-oscillating circuit includes a first transformer T1, a first transistor Q1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, a second resistor R2, and a third resistor R3, the first transformer T1 is provided with a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal and the second input terminal of the first transformer T1 are connected to the voltage input interface J2, so that a first voltage signal can be generated between the first input terminal and the second input terminal under the action of a neutral electrode, and the first voltage signal is formed by a sine wave.
Specifically, the first transistor Q1 is an NPN transistor, and the first capacitor C1 and the first resistor R1 are connected between the first base of the first transistor Q1 and the first output terminal of the first transformer T1; one end of the second resistor R2 is connected with the first base electrode, and the other end is grounded; one end of the fourth capacitor C4 is connected with the first base electrode, and the other end is grounded; the second capacitor C2 and the third capacitor C3 are connected in series between the first output terminal and the first collector of the first transistor Q1, and the first emitter of the first transistor Q1 is connected between the third capacitor C3 and the second capacitor C2; the third resistor R3 has one end connected to the first emitter and the other end connected to ground; one end of the fifth capacitor is connected with the first collector, the other end of the fifth capacitor is simultaneously connected with the sixth capacitor and the fourth resistor, one end of the sixth capacitor is connected with the fifth capacitor, and the other end of the sixth capacitor is grounded; one end of the fourth resistor is connected with the fifth capacitor, the other end of the fourth resistor is connected with the fifth resistor, one end of the fifth resistor is connected with the fourth resistor, and the other end of the fifth resistor is grounded.
It can be understood that, the second voltage signal corresponding to the first voltage signal can be generated across the sixth capacitor, and when the contact resistance increases, the amplitude of the first voltage signal increases, and the amplitude of the second voltage signal increases, and then the second voltage signal is divided by the fourth resistor and the fifth resistor.
It can be understood that the detection module comprises a self-oscillation circuit for generating a voltage signal according to the contact resistance, and a direct current conversion circuit for processing the voltage signal, wherein an input end of the self-oscillation circuit is connected with the detection interface J4, an output end of the self-oscillation circuit is connected with an input end of the direct current conversion circuit, and an output end of the direct current conversion circuit is connected with the MCU.
With reference to fig. 2, it will be appreciated that the dc converter circuit includes a dc converter U1, with an input of the dc converter U1 connected to an output of the self-oscillating circuit.
Specifically, the dc converter U1 can obtain the voltage across the fourth resistor.
In particular, the fourth resistor is an adjustable resistor, and the detection module can be calibrated by adjusting the tissue of the fourth resistor.
Specifically, the dc converter U1 employs an AD637 rms dc converter U1.
With reference to fig. 2, it can be understood that the dc conversion circuit further includes a voltage follower U2A, an input terminal of the voltage follower U2A is connected to an output terminal of the dc converter U1, and an output terminal of the voltage follower U2A is connected to the MCU.
It can be appreciated that the voltage follower U2A can isolate the MCU from the dc converter U1, making the MCU less susceptible to damage from high voltage currents.
In connection with fig. 3, it will be appreciated that the output of the voltage follower U2A is connected to the PF0 pin of the MCU.
With reference to fig. 3, it can be understood that the electrode contact quality detection circuit may further be provided with a reset circuit, and the reset circuit may reset the electrode contact quality detection circuit to recover the electrode contact quality detection circuit, so as to avoid interference caused by previous detection and influence on detection accuracy.
With reference to fig. 4, it can be understood that the driving module includes a driving chip U4 for boosting voltage and a relay K1 for controlling the on-state of a voltage input interface J2 and a voltage output interface J3, the input terminal of the driving chip U4 is connected to the MCU, and the output terminal of the driving chip U4 is connected to the relay K1. The drive module can be controlled to disconnect the voltage input interface J2 from the voltage output interface J3 in case of poor contact of the neutral electrode with the patient, thereby preventing injury to the patient.
It is understood that the driving module further includes a pull-down resistor, one end of the pull-down resistor is connected to ground, and the other end of the pull-down resistor is connected to the input terminal of the driving chip U4.
With reference to fig. 5, it can be understood that the prompt module includes a prompt audio circuit for emitting an alarm sound, and the prompt audio circuit is connected to the MCU.
The prompting audio circuit can be connected with the MCU and sends out an alarm signal under the control of the MCU. For example, when the voltage received by the MCU at the pin PF0 is greater than the first threshold, the neutral electrode may be in poor contact, and the MCU may control the audio circuit to sound a buzzer or an alarm to alert the user of the abnormal condition of the high-frequency electric knife.
With reference to fig. 6, it can be understood that the prompting module includes an alarm light circuit for emitting alarm light, and the alarm light circuit is connected to the MCU.
Through setting up suggestion module, can pass through audio frequency or light suggestion user under neutral electrode and the poor condition of patient contact to improve the security.
With reference to fig. 6, it can be understood that the alarm indicator light circuit includes a plurality of light emitting modules, an output terminal of each light emitting module is connected to the MCU, and an input terminal of each light emitting module is connected to the 5V power supply. Because a plurality of light emitting components are arranged and are in parallel connection, the light alarm can still be realized under the condition that a single light emitting component is damaged, and the safety is improved.
Specifically, the light emitting component adopts a light emitting diode.
It should be noted that the MCU may be a microprocessor, the model of which may be ATMEGA128A, the model of the dc converter U1 may be AD637, the model of the voltage follower U2A may be LM358, and the model of the driver chip U4 may be ULN 2003.
In addition, the embodiment of the present invention further provides a high-frequency electrotome, which includes the electrode quality detection circuit, and the high-frequency electrotome of the embodiment of the present invention has all technical improvements and technical effects of the electrode contact quality detection circuit in the embodiment described above, and details are not repeated herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. Electrode contact quality detection circuitry is applied to high frequency electrotome, high frequency electrotome includes high frequency power supply, neutral electrode and tool bit, its characterized in that, electrode contact quality detection circuitry includes:
the driving module comprises a voltage input interface and a voltage output interface, the voltage input interface is used for being connected with the high-frequency power supply, the voltage output interface is used for being connected with the cutter head, and the driving module is used for controlling the conducting state of the voltage input interface and the voltage output interface;
the detection module is provided with a detection interface used for being connected with the neutral electrode and used for detecting the contact resistance of the neutral electrode;
the prompting module is used for sending out a prompt to remind a user of the detection condition of the detection module;
and the MCU is used for controlling the driving module and the prompting module to work according to the contact resistance measured by the detection module.
2. The electrode contact quality detection circuit of claim 1, wherein the detection module comprises a self-oscillation circuit for generating a voltage signal according to the contact resistance, and a dc conversion circuit for processing the voltage signal, an input terminal of the self-oscillation circuit is connected to the detection interface, an output terminal of the self-oscillation circuit is connected to an input terminal of the dc conversion circuit, and an output terminal of the dc conversion circuit is connected to the MCU.
3. The electrode contact quality detection circuit of claim 2, wherein the dc conversion circuit comprises a dc converter having an input connected to the output of the self-oscillating circuit.
4. The electrode contact quality detection circuit of claim 3, wherein the DC conversion circuit further comprises a voltage follower, an input terminal of the voltage follower is connected with an output terminal of the DC converter, and an output terminal of the voltage follower is connected with the MCU.
5. The electrode contact quality detection circuit according to claim 1, wherein the driving module comprises a driving chip for boosting voltage and a relay for controlling the on-state of the voltage output interface of the voltage input interface, the input end of the driving chip is connected with the MCU, and the output end of the driving chip is connected with the relay.
6. The electrode contact quality detection circuit of claim 5, wherein the driving module further comprises a pull-down resistor, one end of the pull-down resistor is grounded, and the other end of the pull-down resistor is connected with the input end of the driving chip.
7. The electrode contact quality detection circuit of claim 1, wherein the prompt module includes a prompt audio circuit for emitting an alarm sound, the prompt audio circuit being connected to the MCU.
8. The electrode contact quality detection circuit of claim 1, wherein the prompt module comprises an alarm indicator circuit for emitting an alarm light, and the alarm indicator circuit is connected to the MCU.
9. The electrode contact quality detection circuit according to claim 8, wherein the alarm indicator light circuit comprises a plurality of light emitting modules, an output terminal of each light emitting module is connected with the MCU, and an input terminal of each light emitting module is connected with a 5V power supply.
10. High-frequency electrotome, characterized in that it comprises an electrode contact quality detection circuit according to any one of the preceding claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122112597.7U CN216167809U (en) | 2021-09-02 | 2021-09-02 | Electrode contact quality detection circuit and high-frequency electrotome |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122112597.7U CN216167809U (en) | 2021-09-02 | 2021-09-02 | Electrode contact quality detection circuit and high-frequency electrotome |
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| CN216167809U true CN216167809U (en) | 2022-04-05 |
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