JPS6045532B2 - Body cavity internal pressure control system in laser endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for internal body cavity pressure in a laser endoscope.

The high energy of laser light has come to be used for incising affected areas such as polyps and ulcers, burning fields, and stopping bleeding.In this case, an endoscope is used as a manipulator for a laser guide that guides the laser light, By manipulating a mirror, the laser beam is irradiated precisely onto the affected area.

When using such a laser endoscope by inserting it into a body cavity, air is supplied to the body cavity to inflate it and irradiate it with laser light. Smoke must be removed to ensure the endoscope's field of view, and any remaining dirt must be suctioned and removed from the affected area.
Furthermore, it is necessary to control the air supply to keep the internal pressure of the body cavity within an appropriate range, and then appropriately irradiate the affected area with laser light. Failure to do so will not only cause pain to the patient, but may even be life-threatening. On the other hand, from the perspective of preventing device failures, dust, blood, and dirt adhere to the tip of the laser guide that guides the laser beam, obstructing the progress of the laser beam, which may cause the laser guide to burn out. . Therefore, in order to prevent such accidents, air is constantly allowed to flow through the guide tube containing the laser guide, and air is injected as necessary to prevent dust and other debris from entering the tip of the laser guide inserted into the body cavity. prevents it from adhering. In this way, in the body cavity into which the laser endoscope is inserted, in addition to the normal air supply to inflate the body cavity, air supply to protect the laser guide and exhaust for smoke removal, etc. Furthermore, natural absorption by the human body takes place, but for patient safety, it is necessary to comprehensively adjust the amounts of these pumps and exhausts to keep the internal pressure of the body cavity within a certain range. J The present invention has been made in view of the above-mentioned needs, and its purpose is to obtain a new control system for internal body cavity pressure, to ensure the safety of surgery using a laser endoscope, and to prevent equipment failure. To this end, the pressure inside the body cavity is measured through the internal pressure measuring channel, and the exhaust volume is adjusted based on this, and in order to prevent the internal pressure measuring channel from clogging, It is characterized in that air is supplied to the channel for measuring internal pressure to prevent backflow.

Embodiments of the present invention will be described below with reference to the drawings.

The drawings are schematic explanatory diagrams showing one embodiment of the control system inside a body cavity according to the present invention, in which numeral 1 indicates a body cavity such as a stomach, 2 indicates a laser endoscope inserted into the body cavity 1, and numeral 2 indicates a laser endoscope inserted into the body cavity 1. Although not shown, the laser endoscope 2 includes a light guide for illumination, an image guide for observation, an eyepiece, and an angle operation mechanism.

A laser guide 3 made of quartz fiber or the like and a guide tube 4 made of fluorine resin or the like into which the laser guide 3 is inserted are inserted into the laser endoscope 2 through a forceps guide tube (not shown) or the like. A laser beam such as YAG is sent from a laser oscillation device 5, and a gas such as CO2 is sent to the guide tube 4 from a gas jet device 6.

The gas jet device 6 normally supplies air at a rate of about 0.3 e/min, but when irradiating the affected area with laser light, it injects gas at a rate of about 3 e/min. Laser endoscope 2
A suction tube 7 is inserted through the suction tube 7 to eliminate smoke and dirt generated when the laser beam is irradiated to the affected area. It is connected to an exhaust device 10 such as a pump. Reference numeral 11 indicates an internal pressure measurement channel, and one end of the internal pressure measurement channel 11 is connected to the tip 12 of the laser endoscope 2.
The internal pressure of the body cavity 1 is guided to the pressure/force sensor 13.

The pressure sensor 13 is made of a piezo element or the like, and is
The internal pressure of the exhaust system 10 is displayed on the display means 14, and a signal is sent to the flow rate control valve 8.
The amount of exhaust gas is adjusted, and the volume inside the body cavity is adjusted. Part pressure is 15cm
It is maintained at around Aq. By the way, since the internal pressure measurement channel 11 is a tube body and is inserted together with the laser endoscope 2 into the body cavity 1 where filth is present, it often becomes clogged due to backflow of body fluids, etc. Internal pressure data of the body cavity 1 may not be accurately sent to the sensor 13.

When the internal pressure data is no longer sent, the exhaust volume of the exhaust device 10 is not adjusted by the flow rate control valve 8, and as a result, the internal pressure of the body cavity 1 deviates from the above-mentioned appropriate range.
If the temperature falls below this range, the body cavity 1 will contract and observation using the laser endoscope 2 or laser beam irradiation cannot be performed.On the other hand, if it exceeds this range, the body cavity 1 will expand beyond this limit. This poses a risk to the patient. Therefore, in order to prevent such clogging, an air supply means is connected to the internal pressure measurement channel 11, and air is supplied from the air supply means (continuously or intermittently) to prevent backflow of body fluids, etc. I have to. In other words, 15 is an air supply pump, 16 is a tank, and 17 is a stabilizer, and by these, 0
．． A flow rate sufficient to prevent backflow is supplied from the tank 16, which has a constant pressure of about 4 kg/c/t, to the seven channels 11 for internal pressure measurement. Further, 18 indicates a control valve that controls air supply from the tank 16, and the control valve 1
8, air is supplied continuously or intermittently at a flow rate sufficient to prevent backflow, and accordingly, internal pressure data is sampled continuously or intermittently by the internal pressure measurement channel 11 and the pressure sensor 13. This is done at regular intervals. As the control valve 18, a throttle valve or an intermittent operation valve is used, and 19 indicates a timer of the control valve 18. Next, to explain the operation, similar to normal endoscopy, the laser endoscope 2 is inserted into the body cavity 1 for observation, and if it is determined that treatment with laser light is necessary, the forceps guide tube is inserted. Insert the laser guide 3 toward the affected area.

At this time, there is a possibility that body fluid or other substances adhering to the inner wall of the forceps guide tube or the like may adhere to the tip of the laser guide 3. Therefore, in order to prevent such adhesion, air is supplied at a rate of approximately 0.3 e/min, but when irradiating the laser beam, in addition to this, the covering of the affected area must be removed. In order to exhaust smoke and prevent droplets from the affected area to be irradiated with the laser beam from adhering to the tip of the laser guide 3, the amount of air supplied is increased. These become factors that increase the internal pressure of the body cavity 1. On the other hand, body cavity 1
Absorption by the human body is a factor that reduces the internal pressure of .

The body cavity 1 having these variable factors, as described above,
For observation, laser beam irradiation, and patient safety, the internal pressure must be adjusted to within a certain tolerance range.

Therefore, the pressure is measured by the pressure sensor 13 via the internal pressure measurement channel 11, and based on the result, the exhaust device 10
is adjusted by the flow rate control valve 8, and if the internal pressure of the body cavity 1 becomes abnormally high for some reason, a signal is sent from the pressure sensor 13 to the gas jet device 6, and the The energy may be restricted or stopped, and if necessary, the laser irradiation may also be stopped.

Furthermore, the internal pressure measurement channel 11 is easily clogged, which interferes with internal pressure measurement.

In order to prevent this, air is sent continuously or intermittently from the air sending means, and in particular, the opening portion of the internal pressure measurement channel 11 is cleaned. Note that air supply for cleaning also causes a change in the internal pressure of the body cavity 1, but this is also measured by the pressure sensor 13, and the flow rate is controlled based on this.

Then, under the pressure adjusted within a certain range in this manner, the laser beam is irradiated onto affected areas such as polyps and ulcers existing within the body cavity 1.

Note that the internal pressure measuring channel 11 may be a conventionally used air supply channel, or may be an independent channel.

Further, the suction tube 7 may share the forceps guide tube, or may be independent.

As described above, according to the control system according to the present invention, the internal pressure of the body cavity, which has various fluctuation factors, is measured through the internal pressure measurement channel, and based on this, the exhaust volume is adjusted to keep the pressure inside the body cavity constant. This system improves the safety of surgery using laser light by maintaining the internal pressure at a constant temperature, cutting off exhaust air in the case of abnormally high pressure, and supplying air to prevent backflow into the internal pressure measurement channel to prevent clogging. This has the effect of ensuring performance and preventing failure of the device.

[Brief explanation of the drawing]

The drawing is a schematic explanatory diagram of a control system according to the present invention. 1... Body cavity, 2... Loser endoscope,
3... Laser guide, 4... Guide tube, 5
... Loser oscillation device, 6 ... Gas jet device, 7 ... Suction pipe, 8 ... Flow rate control valve, 10 ... Exhaust device , 11... Channel for internal pressure measurement, 12... Tip, 13...
・Pressure sensor, 15... Air pump, 16.
... Tank, 18 ... Control valve, 19 ...
···timer.

Claims (1)

[Claims] 1 One end is open at the tip of the endoscope, into which a laser guide is inserted to guide laser light to the affected area, and an internal pressure measurement channel that guides the pressure inside the body cavity to a pressure sensor is connected to the internal pressure measurement channel. A body cavity in a laser endoscope, characterized in that the body cavity has an air supply means for supplying air for backflow prevention intermittently or intermittently, and a hand means for controlling an exhaust device based on the measurement result by the pressure sensor. Internal pressure control system.