JPS6260571A - Fiber applicator for endoscopic treatment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fiber applicator for endoscopic therapy, particularly an improved endoscopic therapy that can be used in combination with an endoscope to effectively perform laser light therapy within a body cavity. The present invention relates to a fiber applicator for vision therapy.

[Prior Art] Endoscopic therapy is the use of an endoscope to treat cancer or ulcers in body cavities, such as the stomach, using light energy such as laser light. , Nd-YAG
A photochemical reaction is caused using a laser or the like to cause cancer cells to become necrotic.

In this type of endoscopic treatment, laser light is irradiated to the affected area using a therapeutic fiber applicator installed in a part of an endoscopic fiberscope inserted into the body cavity, and the tip of the fiber is attached to the stomach wall. It is performed in close proximity to the affected tissue.

At this time, in order to remove body fluids, blood, etc. adhering to the affected area, a gas supply tube is provided in a part of the fiber applicator to supply gas to the tip of the fiber.

Therefore, body fluids adhering to the affected tissue, such as gastric juice, can be completely removed by the gas blown out from the tip of the fiber, and the affected tissue can be properly irradiated with laser light.

[Problems to be solved by the invention - Problems of the prior art However, with the above-mentioned applicator for endoscopic treatment,
Because the tip of the fiber is placed close to the affected tissue within iCm, the tip of the fiber may come into contact with the affected area before irradiating the laser beam, and blood or body fluids may adhere to the affected area. If a laser beam is irradiated with blood or the like attached, there is a problem in that burn-in occurs on the laser beam irradiated surface.

This kind of problem occurs very easily during laser beam irradiation treatment performed under an endoscope, and it is extremely difficult to know because the tip surface does not develop even if body fluids etc. adhere to the fiber tip. Met. In addition, once the burn-in occurs on the irradiated surface of the fiber tip, it cannot be completely removed even if it is simply cleaned with a cloth, so precise polishing must be performed, which is extremely troublesome. The problem was that it was expensive and expensive.

[Object of the Invention] The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to issue a warning to the operator before the tip of the fiber comes into contact with the affected tissue, and to prevent bodily fluids, etc. from appearing on the irradiation surface of the fiber tip. An object of the present invention is to provide a fiber applicator for endoscopic treatment that does not require laser beam irradiation with the fiber applicator attached.

[Means and effects for solving the problems] In order to achieve the above object, the present invention provides an endoscopic treatment in which gas is supplied to the tip of a fiber and the gas is blown onto the affected area to perform laser light treatment. In the fiber applicator for use, there is a pressure sensor that detects the pressure of the gas flowing in the gas supply pipe provided on the outer periphery of the fiber, and an alarm buzzer, υ, that alerts the operator based on the output signal of this pressure sensor. The present invention is characterized in that it is equipped with a signal processing circuit that performs predetermined signal processing to operate the reward pump, and issues a warning to the operator before the tip of the fiber comes into contact with the affected tissue in the living body.

Although the present invention has the above configuration, when the fiber tip approaches the affected area, resistance is added to the gas flowing out from the fiber tip, making it difficult for the gas to flow out from the gas supply tube. This means that the pressure of the gas flowing inside the gas supply tube has increased, and by detecting this pressure with a pressure sensor and supplying it to the signal processing circuit, the fiber tip can be directed to the affected area. Proximity is detected and the operator is notified by an alarm lamp or alarm buzzer.

Embodiment] Hereinafter, a preferred first embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a structural block of a fiber applicator for endoscopic treatment, in which a fiber 10 for guiding laser light is covered and held by an external device 2. As shown in FIG. The space formed by this fiber 10 and the external device 2 is an α-body supply pipe 14, and gas for spraying on the affected area is supplied from a gas supply cylinder 16 via a pressure regulating valve 18. be done. Therefore, gas is blown at a predetermined pressure from the tip 20 of the fiber toward the living tissue 22, which is the affected area.

A characteristic feature of the present invention is that the flow pressure of the gas is detected to notify that the tip of the fiber approaches the living tissue, and the pressure for detecting the pressure of the gas flowing in the gas supply tube 14 is A sensor 24 is placed at a suitable location on the gas delivery tube. This pressure sensor 24 is connected to the gas supply pipe 14
Any place where gas flows can be used, and the flow pressure is detected as a voltage signal and supplied to the signal processing circuit 26.

When the biological tissue 22 and the fiber tip 20 maintain a certain distance or more, the output voltage of the pressure sensor 24 is also constant, and when the fiber tip 20 approaches the biological tissue 22 to a position of a predetermined distance Q, In this case, the output voltage of the pressure sensor 24 becomes a voltage increased by a predetermined voltage Δ■. Then, the signal processing circuit 26 determines whether the above-mentioned increased voltage ΔV is equal to or higher than the voltage that indicates that the fiber tip 20 is close to the living tissue 22, and when it is equal to or higher than a predetermined voltage, the alarm buzzer 28 is activated. It doesn't ring.

Note that the other output of the signal processing circuit 26 is connected to the pressure regulating valve 18.
The pressure of the gas flowing through the gas supply pipe 14 is maintained constant by the output signal of the signal processing circuit 26.

In this way, the LED light irradiation surface of the fiber tip is prevented from coming into contact with the tissue within the body cavity, and it is possible to prevent burn-in due to laser light irradiation.

Furthermore, in this embodiment, the fiber tip 20 is connected to the biological tissue 2.
2, and detects contact with living tissue 22 by the output voltage of the pressure sensor 24 described above and sounds an alarm buzzer in case of proximity. Therefore, if the alarm buzzer notifying the contact sounds, the fiber applicator can be removed from the endoscope and the distal end surface of the fiber 10 can be carefully cleaned before irradiating the laser beam. .

Next, a second embodiment of a fiber for endoscopic treatment equipped with a regulator that automatically adjusts the internal pressure in a body cavity will be described. Note that the same members as those in the first embodiment are given the same reference numerals and their explanations will be omitted.

In FIG. 2, a fiberscope 3 is inserted into a body cavity, for example, into the stomach.
0 has been introduced into the fiberscope 30, and there are ? In addition to the fiber for U It and the fiber 10 for treatment, a gas discharge pipe 32 is provided to discharge gas supplied into the stomach to the outside of the body. An automatic internal pressure regulator 34 is connected to this gas discharge pipe 32, and discharges gas to the outside of the body while keeping the pressure within the stomach constant.

The output of this automatic internal pressure regulator 34 is supplied to a signal processing circuit 26, which sets a base Q value of the pressure inside the gas supply pipe 14 in consideration of the internal pressure, and based on this, The output signal of the pressure sensor 24 is processed. Therefore, it is detected whether or not the fiber tip 20 approaches the stomach wall based on the predetermined pressure in the stomach adjusted by the automatic internal pressure regulator 34. If the fiber tip 20 comes close to the stomach wall, the alarm buzzer 28 issues an alarm. emanate.

The inside of the body cavity where such endoscopic treatment is performed is often in a sealed state, and the pressure inside the body cavity changes by sending gas to the inner wall of the body cavity. Adjusting the internal pressure is extremely important, and even in such a device, it is possible to process the output signal of the pressure sensor 24 to provide a stable and reliable warning to the operator.

[Effects of the Invention] As explained above, according to the present invention, a pressure sensor is provided to detect the pressure of the gas flowing in the gas supply pipe, and it is determined from the output of the pressure sensor that the tip of the fiber is close to the biological tissue. Since a warning is provided, the tip of the fiber does not come into contact with living tissue. If contact occurs, bodily fluids, blood, etc. adhering to the tip surface of the fiber can be wiped clean before laser beam irradiation.

Therefore, it is possible to completely eliminate laser beam irradiation with body fluids etc. attached, and there is no need to polish the fiber tip because there is no burn-in, making it a highly economical endoscopic treatment. The fiber applicator enables efficient treatment.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a preferred first embodiment of the fiber applicator for endoscopic treatment according to the present invention, and FIG. 2 is an explanatory diagram showing a second embodiment. 10... Fiber 14... Gas supply pipe 16... Gas supply cylinder 20... Fiber tip 22... Living tissue 24... Pressure sensor 26... Signal processing circuit 28... Alarm buzzer 32... Gas discharge pipe 34... Internal pressure automatic regulator.

Claims (2)

[Claims] (1) In a fiber applicator for endoscopic therapy that is equipped with a gas delivery mechanism that arranges a gas delivery tube at the tip of the fiber and blows the gas to the affected area, and performs laser light therapy in conjunction with an endoscope, A pressure sensor that detects the pressure of the gas flowing in the gas supply pipe and a signal processing circuit that performs predetermined signal processing for alarm based on the output of the pressure sensor are provided, and the tip of the fiber contacts the living tissue. A fiber applicator for endoscopic treatment, which is characterized by emitting an alarm beforehand. (2) In the applicator according to claim (1), an automatically adjusted internal pressure is supplied to the signal processing circuit while discharging gas in the body cavity to the outside of the body, and the pressure is adjusted based on the internal pressure. A fiber applicator for endoscopic treatment characterized by signal processing of sensor output.