High-frequency electrotome gas flow automatic control system

Abstract

The utility model relates to a high-frequency electrotome gas flow automatic control system which comprises a gas source, a gas compressor connected with the gas source and a gas buffer tank connected with the gas compressor. A first electromagnetic valve is arranged on a gas passage between the gas source and the gas buffer tank, and a second electromagnetic valve is arranged on a gas passage between the gas buffer tank and the electrotome; the gas source inflates the gas buffer tank; and the gas flow of the electrotome is controlled between the gas buffer tank and the electrotome through a second electromagnetic valve. The gas buffer tank is used for storing gas, and the pressure of the gas buffer tank is controlled within a certain fixed period, so that the gas consumption of the electrotome can be controlled to be stable without large fluctuation.

Description

Technical Field

[0001] The utility model relates to a stable gas flow control system, in particular to a high-frequency electric knife gas flow control system, belonging to the technical field of medical equipment. Background Art

[0002] The argon controller uses the high-frequency energy generated by the high-frequency electric knife to be fully ionized into argon ions with good conductivity through the tungsten steel leaf electrode, producing an argon arc with uniform distribution and extremely high density. Compared with general high-frequency electric knives, the eschar produced by the argon electric knife is uniform and smooth, with a thickness of only 1 / 3-1 / 5 of that of general electric knives, which can reduce blood loss by 50% and shorten the operation time. It has the outstanding advantages of fast hemostasis, low degree of tissue carbonization, small tissue damage, and short postoperative healing time.

[0003] High-frequency surgical systems are widely used in the clinical medical field because of their advantages over traditional surgical instruments. During surgery, how to perform high-precision and stable argon flow control is an important difficulty in clinical applications. The control of argon is reflected in the following aspects:

[0004] 1. Gas supply: When performing a long operation, a single gas source may not be able to meet the needs of the operation.

[0005] 2. Pressure control: During digestive endoscopic surgery, argon pressure control is extremely important. Improper gas pressure can lead to surgical risks.

[0006] 3. Flow control: For specific application scenarios, the required argon gas flow rate is different. When the gas pressure is unstable, the gas flow rate will be unstable. Whether the corresponding flow rate can be generated stably and accurately is also the key and difficulty.

[0007] Taking the above aspects into consideration, a stable, reliable and high-precision gas flow control system was designed to solve the problem of argon gas flow control during argon electrosurgical surgery. Summary of the invention

[0008] The utility model aims to provide a stable and reliable gas flow control system to solve the problem of unstable argon gas flow during argon electrosurgical surgery.

[0009] To achieve the above-mentioned purpose, the utility model provides a technical solution 1, which is a gas flow control system for an electric knife, comprising a gas source, a gas compressor connected to the gas source, and a gas buffer tank connected to the gas compressor;

[0010] A first solenoid valve is provided on the gas passage between the gas source and the gas buffer tank, and a second solenoid valve is provided on the gas passage between the gas buffer tank and the electric knife;

[0011] The gas source inflates the gas buffer tank;

[0012] The gas flow of the electric knife is controlled by a second electromagnetic valve between the gas buffer tank and the electric knife.

[0013] Furthermore, a second pressure sensor is provided on the gas buffer tank;

[0014] The first solenoid valve controls the input flow rate of the gas according to the pressure of the gas buffer tank;

[0015] The second solenoid valve controls the output flow rate of the gas.

[0016] Furthermore, the adjustment speed of the first solenoid valve is greater than the adjustment speed of the second solenoid valve.

[0017] Further, it includes a plurality of gas sources, each of which is provided with a first pressure sensor;

[0018] Furthermore, when the gas source pressure drops to the set threshold, the gas source is switched.

[0019] Furthermore, a gas return pipeline is provided between the outlet of the gas compressor and the gas source, and a third solenoid valve is provided on the gas return pipeline. The third solenoid valve adjusts the valve opening according to the pressure of the gas buffer tank.

[0020] The beneficial effect of the first technical solution of the utility model is: by using a gas buffer tank to store gas and controlling the pressure of the gas buffer tank within a certain fixed period, the gas consumption of the electric knife can be controlled to be stable without large fluctuations. First, the gas buffer tank is inflated and the gas compressor does not stop working during the period when the pressure reaches the set threshold. Since the outlet of the gas compressor is provided with a reflux pipeline, when the pressure in the gas buffer tank is displayed to be higher than the upper pressure limit, the valve of the first solenoid valve will be closed, the valve of the third solenoid valve will be opened, and the gas will self-circulate through the compressor. Once the operation continues, the pressure of the gas buffer tank will slowly decrease, the valve of the first solenoid valve will slowly open, and the valve of the third solenoid valve will slowly close, so as to prevent the operation from being interrupted midway, resulting in large fluctuations in flow caused by pressure fluctuations in the entire system, thereby bringing surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the PID flow chart of the high-frequency electric knife gas flow control system of the utility model.

[0022] Figure 2 This is a flow data diagram collected from an experiment of the high-frequency electric knife gas flow control method of the utility model.

[0023] 1-gas source, 2-first solenoid valve, 3-gas compressor, 4-third solenoid valve, 5-second pressure sensor, 6-second solenoid valve, 7-electric knife, 8-gas buffer tank, 9-first pressure sensor, 10-check valve, 11-flow meter. DETAILED DESCRIPTION

[0024] In order to further understand the content of the utility model, the utility model is described in detail below with reference to the accompanying drawings. Example

[0025] This embodiment provides a Figure 1 The high-frequency electrosurgical knife gas flow control system shown includes a gas source 1 , a gas compressor 3 connected to the gas source 1 , and a gas buffer tank 8 connected to the gas compressor 3 .

[0026] Optionally, a one-way valve 10 is installed at the outlet of the gas compressor 3 to prevent the gas in the gas buffer tank 8 from flowing back.

[0027] A first electromagnetic valve 2 is provided on the gas passage between the gas source 1 and the gas buffer tank 8 , and a second electromagnetic valve 6 is provided on the gas passage between the gas buffer tank 8 and the electric knife 7 .

[0028] The gas compressor 3 is turned on, and the gas source 1 inflates the gas buffer tank 8 .

[0029] The gas flow of the electric knife 7 is controlled by a second electromagnetic valve 6 between the gas buffer tank 8 and the electric knife 7, and a flow meter 11 is provided.

[0030] The gas buffer tank 8 is provided with a second pressure sensor 5 .

[0031] The first solenoid valve 2 controls the input flow of the gas according to the pressure of the gas buffer tank 8. The pressure setting threshold of the gas buffer tank 8 includes an upper pressure limit and a lower pressure limit, and the difference between the upper pressure limit and the lower pressure limit is set within a very narrow range. In this way, the pressure of the gas buffer tank 8 is adjusted according to the valve opening of the first solenoid valve 2, and the valve opening of the first solenoid valve 2 will not fluctuate greatly.

[0032] The second solenoid valve 6 controls the output flow of the gas according to the flow meter 11. The valve opening of the second solenoid valve 6 will affect the pressure of the gas buffer tank 8. However, the utility model is ultimately to stabilize the flow of the electric knife 7. Therefore, the adjustment speed of the first solenoid valve 2 is set to be greater than the adjustment speed of the second solenoid valve 6. The slow adjustment speed of the second solenoid valve 6 can stabilize the output flow of the gas. Once the pressure of the gas buffer tank 8 fluctuates greatly, because the adjustment speed of the first solenoid valve 2 is fast, the pressure of the gas buffer tank 8 can be quickly controlled within the set threshold period.

[0033] Optionally, the present embodiment includes multiple gas sources, each of which is provided with a first pressure sensor 9; when the pressure of one gas source 1 drops to a set threshold, it is switched to another gas source. Even if the gas source is switched at this time, due to the presence of the gas buffer tank 8, the electrosurgical knife directly uses the gas in the gas buffer tank 8, and the flow rate will also be very stable.

[0034] In this embodiment, a gas return pipeline is also provided between the outlet of the gas compressor 3 and the gas source 1, and a third solenoid valve 4 is provided on the gas return pipeline, and the third solenoid valve 4 adjusts the valve opening according to the pressure of the gas buffer tank 8. If the operation is stopped midway, the gas in the gas buffer tank 8 is no longer used, and a return pipeline is provided at the outlet of the gas compressor 3. When the pressure in the gas buffer tank 8 is higher than the upper pressure limit, the valve of the first solenoid valve 2 will be closed, the valve of the third solenoid valve 4 will be opened, and the gas compressor 3 will not stop working. Once the operation continues, the pressure of the gas buffer tank 8 will slowly decrease, the valve of the first solenoid valve 2 will slowly open, and the valve of the third solenoid valve 4 will slowly close, so as to prevent the operation from being interrupted midway, resulting in a large fluctuation in flow caused by the pressure fluctuation of the entire system, thereby bringing surgical risks.

[0035] In the figure: FTC stands for flow display control; PTC stands for pressure display control.

[0036] like Figure 1 As shown, firstly, the gas compressor 3 is turned on to inflate the gas buffer tank 8 until the pressure in the gas buffer tank 8 reaches the set threshold value; the valve opening of the first solenoid valve 2 and the third solenoid valve 4 is controlled by the pressure in the gas buffer tank 8. The threshold value period includes the upper pressure limit and the lower pressure limit, and the difference between the upper pressure limit and the lower pressure limit is set within a very narrow range.

[0037] When the pressure in the gas buffer tank 8 reaches the set threshold, the first solenoid valve 2 is automatically closed and the third solenoid valve 4 is opened, so that the gas at the outlet of the gas compressor flows back into the gas source;

[0038] Then, open the second solenoid valve 6 to supply gas to the electric knife; at this time, the pressure in the gas buffer tank 8 will slowly decrease. When the pressure drops below the set threshold, the system will automatically close the third solenoid valve 4 and slowly open the first solenoid valve 2 to inflate the gas buffer tank 8.

[0039] The system will automatically adjust and control the opening of the third solenoid valve 4 and the second solenoid valve 2 according to the pressure in the gas buffer tank 8 .

[0040] The gas flow control system and automatic control method for the electrosurgical unit in this embodiment can be precisely adjusted step by step within the range of 0.1-2 liters / min, meeting the needs of various surgeries including digestive endoscopic surgery to the greatest extent; the electrode gas flow is automatically controlled, and the pressure of the gas buffer tank is automatically controlled to ensure the stability of the gas pressure at the electrode source, thereby ensuring the stable output of the electrode flow, and finally achieving adjustable flow within the range of 0.1L / min~12L / min. Figure 2 The figure shows the flow data graph collected from the experiment of the high-frequency electric knife gas flow control method of the utility model. When the pressure control of the gas buffer tank 8 is stable, the flow control of the high-frequency electric knife can be stabilized within 20 seconds, and the subsequent flow has been very stable without large fluctuations.

[0041] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-frequency electrosurgical gas flow automatic control system, characterized in that: It includes a gas source, a gas compressor connected to the gas source, and a gas buffer tank connected to the gas compressor; A first solenoid valve is provided on the gas passage between the gas source and the gas buffer tank, and a second solenoid valve is provided on the gas passage between the gas buffer tank and the electric knife; The gas source inflates the gas buffer tank; The gas flow of the electric knife is controlled by a second electromagnetic valve between the gas buffer tank and the electric knife.

2. The high-frequency electrosurgical gas flow automatic control system according to claim 1, characterized in that: The gas buffer tank is provided with a second pressure sensor; The first solenoid valve controls the input flow rate of the gas according to the pressure of the gas buffer tank; The second solenoid valve controls the output flow rate of the gas.

3. The high-frequency electrosurgical gas flow automatic control system according to claim 2, characterized in that: The adjustment speed of the first solenoid valve is greater than the adjustment speed of the second solenoid valve.

4. The high-frequency electrosurgical gas flow automatic control system according to claim 1, characterized in that: It includes multiple gas sources, each of which is provided with a first pressure sensor.

5. The high-frequency electrosurgical gas flow automatic control system according to claim 4, characterized in that: When the gas source pressure drops to a set threshold, the gas source is switched.

6. The high-frequency electrosurgical gas flow automatic control system according to claim 1, characterized in that: A gas return pipeline is also provided between the outlet of the gas compressor and the gas source, and a third solenoid valve is provided on the gas return pipeline. The third solenoid valve adjusts the valve opening according to the pressure of the gas buffer tank.

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