Safe and reliable control handle for plasma ablation electrode

Abstract

The utility model discloses a safe and reliable control handle for a plasma ablation electrode, which comprises a handle body, a holding curved surface is arranged on the handle body, and the holding curved surface is divided into a holding area and an operating area; at least one key is arranged on the operation area, and when the key is in a pressed state, the control handle outputs a corresponding key signal through the key detection circuit; a holding detection piece is arranged on the holding area, and when it is detected that the handle is in a holding state, a confirmation signal is output; the handle body is further connected with or internally provided with a control judgment assembly, and the control judgment assembly is in signal connection with the key detection circuit and the holding detection circuit, receives a key signal and outputs the key signal when a confirmation signal is in a confirmation state. The key is arranged at the specific position on the control handle body, meanwhile, the holding detection piece used for detecting whether an operator correctly holds the handle is arranged, and only when the operator correctly holds the handle and simultaneously presses down the key to operate, it is judged that the operation is effective, and therefore the situation of misoperation in the operation process is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ablation medical equipment, and more specifically, to a safe and reliable control handle for plasma ablation electrodes. Background Art

[0002] Plasma ablation is a method of destroying tissues using plasma generated by high-frequency electric fields. The principle is to use the high temperature and high electric field effects generated by radio frequency energy in tissues to cause protein denaturation and coagulation in tissue cells, thereby leading to tissue necrosis, thereby eliminating the lesion tissue.

[0003] During the operation, with the help of external visual equipment, such as an endoscope, the plasma surgical electrode is inserted into the lesion site, and then the lesion site is ablated. The above-mentioned plasma surgical electrode is a disposable surgical consumable, including a plasma blade, a surgical electrode rod, a plastic handle, and a cable. The cable is connected to the external radio frequency plasma surgical host. In some embodiments, the electrode is also connected to the peristaltic pump set in the host through an infusion catheter to inject physiological saline into the lesion site during ablation.

[0004] Currently, the switch or parameter control of plasma ablation electrodes is mostly completed by foot pedals. A small number of manufacturers will set the control button of the electrode on the handle. The main reason for this is that during the ablation operation, the doctor holds the handle in his hand, and it is easy to make mistakes when touching the button due to bumps, which brings uncertainty to the safe implementation of the ablation operation. Utility Model Content

[0005] In view of the problem that the ablation electrode control handle is prone to misoperation in actual use, the purpose of this application is to propose a safe and reliable plasma ablation electrode control handle, which can effectively avoid the occurrence of misoperation during surgery. The specific solution is as follows:

[0006] A safe and reliable control handle for a plasma ablation electrode, comprising a handle body, the handle body being provided with a gripping curved surface suitable for palm gripping and meeting ergonomic design, the gripping curved surface being divided into a gripping area and an operating area;

[0007] The operation area is configured as an area suitable for the movement of the palm and thumb, and at least one key is arranged on it. When the key is in a pressed state, the control handle outputs a corresponding key signal through the key detection circuit;

[0008] The gripping area is configured as an area suitable for the palm to fit, and a gripping detection element is arranged on the area. When it is detected that the handle is in a gripping state, the gripping detection circuit outputs a confirmation signal;

[0009] The handle body is also connected to or has a built-in control judgment component, which is connected to the button detection circuit and the grip detection circuit signal, receives the button signal and outputs the confirmation signal when it is in a confirmation state.

[0010] Through the above technical solution, during the ablation operation, only when the operator holds the handle body with a specific gesture and presses the corresponding button at the same time, can the key signal corresponding to the button, that is, the operation instruction, be output. This can avoid the occurrence of misoperation of the buttons on the handle body due to bumps during the operation, thereby improving the reliability of the plasma ablation electrode.

[0011] Further, the grip detection element includes a photoelectric sensor, a capacitive sensor, a pressure sensor or any combination thereof arranged on the gripping area of ​​the handle body;

[0012] The grip detection circuit is arranged inside the handle body and is electrically connected to the grip detection component and the control judgment component.

[0013] Through the above technical solution, it is possible to accurately detect whether the operator is holding the handle body correctly in a variety of ways, thereby avoiding misjudgment of the control judgment component.

[0014] Further, the photoelectric sensor includes a reflective infrared detection probe, which is built into the handle body and forms a detection site on the gripping area of ​​the handle body;

[0015] The capacitive sensor comprises a metal electrode piece in an annular shape arranged around the gripping area of ​​the handle body;

[0016] The pressure sensor is configured as a patch pressure sensor and is arranged on the gripping area of ​​the handle body.

[0017] Furthermore, the control judgment component includes:

[0018] A comparator, comprising a two-input comparator, wherein a positive input terminal is electrically connected to a detection output terminal of a grip detection circuit, a reverse input terminal is coupled to a reference voltage, and a comparison output terminal outputs a comparison signal;

[0019] The key detection circuit has an input terminal coupled to a reference voltage, an output terminal connected in series with two resistors and then grounded, a self-reset key switch is arranged in the middle, and a detection output terminal is connected between the two voltage-dividing resistors;

[0020] The logic judgment module includes a two-input logic AND gate, whose input end is electrically connected to the comparison output end of the comparator and the detection output end of the key detection circuit respectively, and the output end outputs the key signal to the external RF host.

[0021] Through the above technical solution, using simple logic devices and circuit modules, the judgment output of key signals can be realized, the probability of misoperation can be reduced, and the reliability of the ablation electrode handle can be improved.

[0022] Furthermore, the control judgment component is also provided with an anti-interference unit, including a grounding capacitor arranged in the key detection circuit, and a delay confirmation loop arranged in series at the comparison output end of the comparator.

[0023] Through the above technical solution, the interference caused by short-term touching or pressing of buttons can be eliminated, thereby improving the anti-interference ability of the control handle.

[0024] Furthermore, a self-locking key switch is provided between the output end of the logic judgment module and the radio frequency host.

[0025] Through the above technical solution, when the ablation handle is not needed to control the relevant parameters, the output of the key signal can be cut off by the above self-locking key switch.

[0026] Furthermore, the output end of the delay confirmation loop is connected in parallel with a light emitting diode and then grounded.

[0027] Through the above technical solution, when the operator presses the button and confirms the output of a high-level signal, the light-emitting diode lights up to prompt the operator of the current control state of the handle.

[0028] Furthermore, a detachable flexible cushion layer is provided on the handle body at the gripping curved surface, and anti-slip bumps are provided on the flexible cushion layer.

[0029] Through the above technical solution, different flexible pad layers can be removed and replaced according to the size of the operator's hand, making the handle body more suitable for holding. At the same time, there will be no sliding during the operation, ensuring that the operation can be performed accurately.

[0030] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0031] By setting a button at a specific position on the control handle body and configuring a grip detection component for detecting whether the operator is holding the handle correctly, during the ablation operation, the operation is judged to be valid only when the operator holds the handle correctly and presses the button at the same time. This can avoid misjudgment caused by bumps on the handle body, ensure the safety of the operation, and effectively avoid the occurrence of misoperation during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is the overall schematic diagram of the control handle;

[0033] Figure 2 Schematic diagram of the control judgment component.

[0034] Figure numerals: 1. handle body; 2. gripping area; 3. operation area; 4. button; 5. detection site; 6. metal pole piece; 7. control judgment component; 8. comparator; 9. button detection circuit; 10. logic judgment module; 11. self-locking button switch; 12. light-emitting diode; 13. flexible pad. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0036] A safe and reliable control handle for plasma ablation electrodes, such as Figure 1 As shown, it includes a handle body 1, one end of the handle body 1 is connected to the electrode needle, and the other end is connected to the cable. A control button 4 is also provided on the handle body 1.

[0037] In the embodiment of the present application, the handle body 1 is provided with a gripping curved surface suitable for palm holding and meeting ergonomic design, and the gripping curved surface is divided into a gripping area 2 and an operating area 3.

[0038] The operation area 3 is configured as an area suitable for the operator's palm and thumb to move, and is provided with at least one button 4. When the button 4 is in a pressed state, the control handle outputs a corresponding button 4 signal through the button 4 detection circuit. The number of the above-mentioned buttons 4 is preferably configured as 1, and at most 3 buttons, namely the front, middle and rear buttons, to prevent the operator from pressing the wrong button 4 when performing an ablation operation.

[0039] The gripping area 2 is configured as an area suitable for the palm to fit, and a gripping detection component is provided on the area. When it is detected that the handle is in a gripping state, the gripping detection circuit outputs a confirmation signal.

[0040] In addition, the handle body 1 is also connected to the RF host via a cable or directly has a control judgment component 7 built in. The control judgment component 7 is connected to the button 4 detection circuit and the holding detection circuit signal, receives the button 4 signal, and outputs the button 4 signal only when the confirmation signal is in the confirmation state. It can be seen from the above technical solution that during the ablation operation, only when the operator holds the handle body 1 with a specific gesture and presses the corresponding button 4 at the same time, can the button 4 signal corresponding to the button 4, that is, the operation instruction, be output. Thereby, the occurrence of misoperation of the button 4 on the handle body 1 due to bumps during the operation can be avoided, thereby improving the reliability of the plasma ablation electrode.

[0041] In the embodiment of the present application, the above-mentioned grip detection member includes a photoelectric sensor, a capacitive sensor, a pressure sensor or any combination thereof arranged on the gripping area 2 of the handle body 1. In detail, the photoelectric sensor includes a reflective infrared detection probe, which is built into the handle body 1 and forms a detection site 5 on the gripping area 2 of the handle body 1. When the operator holds the above-mentioned handle body 1, the infrared light emitted by the transmitting end of the infrared detection probe irradiates the operator's palm and then reflects to the infrared receiving end, thereby determining whether the operator holds the handle body 1 correctly.

[0042] like Figure 1 As shown, the capacitive sensor includes a ring-shaped metal electrode 6 arranged around the gripping area 2 of the handle body 1. When the operator grips the handle body 1 and the palm contacts the two metal electrode pieces 6, the capacitance of the human body itself will be connected to the internal control judgment component 7, and the change of the internal electrical signal will confirm whether the operator is holding the handle body 1 correctly.

[0043] In the embodiment of the present application, the above-mentioned pressure sensor is configured as a patch pressure sensor, which is arranged on the holding area 2 of the handle body 1. When the operator holds the handle body 1, the above-mentioned pressure sensor will detect the pressure and then output a corresponding pressure detection signal, indicating that the operator has correctly held the above-mentioned handle body 1 to avoid misjudgment.

[0044] The grip detection circuit is disposed inside the handle body 1 and is electrically connected to the grip detection component and the control judgment component 7 .

[0045] like Figure 2 As shown, the control judgment component 7 mainly includes a comparator 8, a button 4 detection circuit and a logic judgment module 10.

[0046] In the implementation manner of the present application, a high-level signal is used as a signal output when the holding detection element detects that the handle body 1 is held correctly.

[0047] The comparator 8 is configured as a two-input comparator 8, whose positive input terminal is electrically connected to the detection output terminal of the grip detection circuit, whose reverse input terminal is coupled to a reference voltage, and whose comparison output terminal outputs a comparison signal. In a specific implementation, the reference voltage can be obtained by dividing a standard input voltage, such as a 5V input voltage, by a series resistor.

[0048] The input end of the button 4 detection circuit is coupled to the reference voltage, and the output end is connected in series with two voltage-dividing resistors and then grounded. A self-reset button 4 switch is provided between the reference voltage output end and the voltage-dividing resistor, and a detection output end is connected between the two voltage-dividing resistors. When button 4 is pressed, the button 4 detection circuit is turned on, and the detection output end connected between the two voltage-dividing resistors outputs a high-level signal, i.e., the button 4 signal. In the embodiment of the present application, the self-reset button 4 switch is integrated with a button 4 debouncing circuit module, and its specific structure is a prior art and will not be repeated here.

[0049] When the button 4 detection circuit detects that the button 4 is pressed, it outputs a high level signal.

[0050] In the implementation of the present application, in order to simplify the circuit and thus ensure the reliability and stability of the circuit, the logic judgment module 10 includes a two-input logic AND gate, whose input end is electrically connected to the comparison output end of the comparator 8 and the detection output end of the button 4 detection circuit respectively, and the output end outputs the button 4 signal to the external RF host. It can be seen from the above that the button 4 signal (high level signal) can only be output when the button 4 detection circuit and the comparator 8 output a high level at the same time. The above technical solution uses simple logic devices and circuit modules to realize the judgment output of the button 4 signal, reduce the probability of misoperation, and improve the reliability of the ablation electrode handle.

[0051] In order to further eliminate the interference caused by short-term touching or pressing the button 4 and improve the anti-interference performance of the control handle, the control judgment component 7 is also equipped with an anti-interference unit, including a grounding capacitor arranged in the button 4 detection circuit, and a delay confirmation circuit arranged in series at the comparison output end of the comparator 8. In one embodiment, the delay confirmation circuit includes a delay output circuit and a two-input logic AND gate. The input end of the above-mentioned delay output circuit and one of the input ends of the two-input logic AND gate are electrically connected to the comparison output end of the comparator 8, and the output end of the delay output circuit is electrically connected to the other input end of the two-input logic AND gate. The working principle of the above-mentioned delay confirmation circuit is that the comparator 8 outputs a high level representing a confirmation signal, and then the delay output circuit delays the setting time after receiving the above-mentioned high level signal, such as outputting after 0.5S. If the comparison output end of the comparator 8 is still a high level signal after the delay setting time, the logic AND gate will continue to output a high level, thereby eliminating the judgment interference caused by circuit or external collisions. Figure 2 As shown, the output end of the delay confirmation circuit is connected in parallel with a light-emitting diode 12 and then grounded. The light-emitting diode 12 is a green LED light. When the operator presses the button 4 and confirms the output of a high-level signal, the light-emitting diode 12 lights up to prompt the operator of the current control status of the handle.

[0052] A self-locking key switch 11 is provided between the output end of the logic judgment module 10 and the radio frequency host. When the ablation handle is not needed to control the relevant parameters, the output of the key 4 signal can be cut off by the self-locking key switch 11.

[0053] Optimally, the handle body 1 is further provided with a detachable flexible cushion layer 13 at the gripping curved surface, and the flexible cushion layer 13 is provided with anti-skid convex points. The user can remove and replace the flexible cushion layer 13 of different thicknesses or sizes according to the size of the operator's hand, so that the handle body 1 is more suitable for the operator to hold. At the same time, the anti-skid convex points increase the friction between the palm and the handle, so that the handle will not slip during the operation, ensuring that the operation can be carried out smoothly.

[0054] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A safe and reliable control handle for a plasma ablation electrode, comprising a handle body (1), characterized in that: The handle body (1) is provided with a gripping curved surface suitable for palm gripping and meeting ergonomic design, and the gripping curved surface is divided into a gripping area (2) and an operating area (3); The operation area (3) is configured as an area suitable for the movement of a palm and thumb, and is provided with at least one button (4). When the button (4) is in a pressed state, the control handle outputs a corresponding button (4) signal via a button (4) detection circuit; The gripping area (2) is configured as an area suitable for the palm to fit, and a gripping detection element is arranged on the area. When it is detected that the handle is in a gripping state, the gripping detection circuit outputs a confirmation signal; The handle body (1) is also connected to or has a built-in control judgment component (7), which is connected to the button (4) detection circuit and the grip detection circuit signal, receives the button (4) signal and outputs the confirmation signal when it is in a confirmation state.

2. The safe and reliable plasma ablation electrode control handle according to claim 1, characterized in that: The grip detection element comprises a photoelectric sensor, a capacitive sensor, a pressure sensor or any combination thereof, which is arranged on the gripping area (2) of the handle body (1); The grip detection circuit is arranged inside the handle body (1) and is electrically connected to the grip detection component and the control judgment component (7).

3. The safe and reliable plasma ablation electrode control handle according to claim 2, characterized in that: The photoelectric sensor comprises a reflective infrared detection probe, which is built into the handle body (1) and forms a detection site (5) on the gripping area (2) of the handle body (1); The capacitive sensor comprises a ring-shaped metal electrode (6) arranged around a gripping area (2) of a handle body (1); The pressure sensor is configured as a patch-type pressure sensor and is arranged on the gripping area (2) of the handle body (1).

4. The safe and reliable plasma ablation electrode control handle according to claim 1, characterized in that: The control judgment component (7) comprises: A comparator (8) comprising a two-input comparator (8), a positive input terminal of which is electrically connected to a detection output terminal of a grip detection circuit, a reverse input terminal of which is coupled to a reference voltage, and a comparison output terminal of which outputs a comparison signal; A button (4) detection circuit, the input end of which is coupled to a reference voltage, the output end of which is connected in series with two resistors and then grounded, a self-resetting button (4) switch is arranged in the middle, and a detection output end is connected between the two voltage-dividing resistors; The logic judgment module (10) comprises a two-input logic AND gate, whose input end is electrically connected to the comparison output end of the comparator (8) and the detection output end of the key (4) detection circuit respectively, and whose output end outputs the key (4) signal to the external radio frequency host.

5. The safe and reliable plasma ablation electrode control handle according to claim 4, characterized in that: The control judgment component (7) is also provided with an anti-interference unit, which includes a grounding capacitor arranged in the key (4) detection circuit, and a delay confirmation loop arranged in series at the comparison output end of the comparator (8).

6. The safe and reliable plasma ablation electrode control handle according to claim 5, characterized in that: A self-locking key switch (11) is provided between the output end of the logic judgment module (10) and the radio frequency host.

7. The safe and reliable plasma ablation electrode control handle according to claim 5, characterized in that: The output end of the delay confirmation loop is connected in parallel with a light emitting diode (12) and then grounded.

8. The safe and reliable plasma ablation electrode control handle according to claim 1, characterized in that: A detachable flexible cushion layer (13) is also provided on the handle body (1) at the gripping curved surface, and anti-slip protrusions are provided on the flexible cushion layer (13).

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