JPS5917288Y2 - Safety circuit of endoscope equipped with laser scalpel - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety circuit for preventing accidents caused by laser beams in an endoscope equipped with a laser scalpel used as a cautery scalpel.

When an endoscope is inserted into a body cavity and an affected area such as an abnormal formation is found, a treatment method has become available in which the affected area is cauterized by irradiating the affected area with a laser beam such as a YAG laser.

Since the laser beam instantaneously generates coherent light with high energy, if it leaks to areas other than the affected area, such as the patient's or practitioner's body, it will cause serious harm.

The present invention was developed in view of the above points, and the laser beam is emitted after confirming the installation state of the laser guide, the closing of the eye shutter, and the conduction state of the laser guide, thereby emitting high energy. The present invention aims to provide a safety circuit for an endoscope equipped with a laser scalpel that can safely perform cauterization work while protecting patients, practitioners, etc. from accidents caused by laser beams.

The configuration of the present invention will be explained based on the drawings.

The drawing is a schematic explanatory diagram showing an embodiment of the safety circuit of an endoscope equipped with a laser scalpel according to the present invention. A laser generator 9 is connected via an imaging optical fiber bundle 7 that optically connects the observation window 6 of the tip section 5 and a laser shutter 8.
In an endoscope having a laser guide 10 that follows the laser guide 10 and a laser guide guide tube 11 for inserting the laser guide 10, the laser guide 10 is properly installed in the laser guide guide tube 11. a laser guide insertion confirmation signal 12 for confirming the insertion of the laser guide, and an eye shutter closing confirmation signal 1 for confirming the closure of the eye shutter 3 provided in the eyepiece portion 4.
3 and a laser guide normality confirmation signal 14 for confirming that the laser guide 10 is properly conducting without causing disconnection, for example, are generated by appropriate means, respectively.
The laser trigger signal 15 that commands the emission of a laser beam and the laser guide normality confirmation signal 14 are manually ANDed.
The output signal 1 is input to the gate 16 and sampled.
7a, the laser guide insertion confirmation signal 12 and the eye shutter closing confirmation signal 13 are input to a three-man power AND gate 18 for sampling, and the output signal 17b is used to operate the control device 19 of the laser generator 9. It is something.

As a means for generating the laser guide insertion confirmation signal 12, as shown in symbol A, a pair of light emitting element 20 and light receiving element 21 are installed facing each other on the outer periphery of the tip 5 of the laser guide guide tube 11, or An electrical or optical sensor may be provided at the introduction port 22 of the laser guide tube 11.

As an example of an electrical sensor, a switch 24 may be provided which is linked to the lid 23 of the inlet portion 22, as shown by the symbol B, and as an example of an optical sensor, as shown by the symbol C.
As shown in , a pair of light emitting elements 20 and light receiving elements 21 are disposed facing each other around the outer periphery of the laser guide guide tube 11, or as shown in numerals, the light from the light emitting elements 20 is reflected by the laser guide 10. Both may be installed so that light enters the light receiving element 21.

The means for generating the eye shutter closing confirmation signal 13 may be an electric switch that is interlocked with the eye shutter 3.

Further, as means for generating the laser guide normality confirmation signal 14, a conductive wire that can be fused with a laser beam is wound around the outer periphery of the laser guide 10 to serve as a laser leakage sensor 25, and the signal from the laser leakage sensor 25 is inputted to a detector 26. You can also do it.

Incidentally, in order to block only the laser beam, a selective reflection mirror coated with a multilayer film may be used as the eye shutter 3.

Next, the operation of the above configuration will be explained. When an endoscope is inserted into a body cavity and an affected area is found by observation from the eyepiece part 4 through the observation window 6 and the optical fiber bundle 7 for image transmission, First, if the laser guide 10 is properly installed in the laser guide guide tube 11, the laser guide insertion confirmation signal 12 by the above-mentioned various electrical or optical means will be activated by three manual A.
The signal is input to the ND gate 18.

In addition, if the practitioner closes the eye shutter 3 of the eyepiece lens section 4 after setting the cauterization location of the affected area as a result of the above observation, the eye shutter closing confirmation signal 13 will be activated in the same way.
The signal is input to the ND gate 18.

Furthermore, if the laser guide 10 is normally conducting without causing any accidents such as wire breakage on the way, the laser guide normality confirmation signal 14 will be inputted to the two-man power AND gate 16 via the detector 26. .

At this time, if the laser trigger signal 15 that commands the emission of a laser beam is input to the two-man power AND gate 16, the two-man power AND gate 16 samples the laser trigger signal 15 and the laser guide normality confirmation signal 14, and outputs it. The signal 17a is input to the three-man power AND gate 18, and the three-man power AND gate 18 samples the laser guide insertion confirmation signal 12 and the eye shutter closing confirmation signal 13 to confirm safety, and then outputs the output signal 17. b
This causes the control device 19 of the laser generator 9 to operate, and the laser beam cauterizes the affected area via the laser guide 10 passed through the laser guide tube 11.

If any of the above three signals is abnormal, for example, if the eye shutter 3 does not close completely and the eye shutter closing confirmation signal 13 is not input to the three-man power AND gate 18, the laser trigger signal 15 Even if two-person power is input to the AND gate 16, three-person power A operates the control device 19.
Since the output signal 17b of the ND gate 18 is not generated, no laser beam is emitted, and accidents such as irradiation of the laser beam onto the eyes of the practitioner can be prevented.

The above accident prevention effect is the same for the other laser guide insertion confirmation signal 12 and laser guide normality confirmation signal 14.
This makes it possible to prevent accidents such as erroneous irradiation of a laser beam or breakage of the endoscope due to breakage of the laser guide 10 due to incorrect installation of the endoscope.

According to the safety circuit for an endoscope equipped with a laser scalpel according to the present invention having the above-described configuration and operation, the attachment state of the laser guide, the closing of the eye shutter, and the conduction of the laser guide can be controlled by A.
By emitting a laser beam after sampling and confirmation using an ND circuit, it is possible to prevent accidents caused by the laser beam to the body of the practitioner or patient, and to safely cauterize only the affected area. It is possible to exert a great effect.

[Brief explanation of the drawing]

The drawing is a schematic diagram showing an embodiment of a safety circuit for an endoscope equipped with a laser scalpel according to the present invention. 1... Light source, 2... Optical fiber bundle for light transmission, 3... Eye shutter, 4... Eyepiece lens section, 5...・Tip, 6...Observation window,
7... Optical fiber bundle for image transmission, 8... Laser shutter, 9... Laser generator, 10...
... Laser guide, 11 ... Laser guide guide tube, 12 ... Laser guide insertion confirmation signal, 13
...Eye shutter closing confirmation signal, 14...
...Laser guide normality confirmation signal, 15...Laser trigger signal, 16...2 manual AND gate, 17a, 17b...Output signal, 18...
...Three manual AND gate, 19...Control device, 20...Light emitting element, 21...Light receiving element, 22...Inlet port, 23...Lid, 24...Switch.

Claims (1)

[Claims for Utility Model Registration] 1. A light transmitting optical fiber bundle following a light source, an image transmitting optical fiber bundle connecting an eyepiece section provided with an eye shutter and an observation window at the tip, and a laser shutter. In an endoscope having a laser guide following a laser generator and a laser guide guide tube for inserting the laser guide, check that the laser guide is properly installed in the laser guide guide tube. A laser guide insertion confirmation signal to confirm, an eye shutter closing confirmation signal to confirm the closure of the eye shutter, and a laser guide normality confirmation signal to confirm that the laser guide is properly conductive are generated by appropriate means, and the laser A safety circuit for an endoscope equipped with a laser scalpel, characterized in that a laser trigger signal that commands the emission of a light beam is sampled using the above three signals, and then the laser beam is emitted to cauterize the affected area. 2 Sample the laser guide insertion confirmation signal and the laser trigger signal with a two-man AND gate, input the output signal to a three-man AND gate, and input the output signal to the three-man AND gate.
The laser knife according to claim 1 of the utility model registration claim, characterized in that a laser guide insertion/separation signal and an eye shutter closing confirmation signal are inputted to the D gate, and the output signal after sampling is used to emit a laser beam. Endoscope safety circuit with. 3. Utility model registration claim 1, characterized in that a set of a light emitting element and a light receiving element are installed facing each other on the outer periphery of the tip of the laser guide guide tube to generate a laser guide insertion confirmation signal. Endoscope safety circuit with laser scalpel. 4. A laser scalpel according to claim 1 of the utility model registration claim, characterized in that a switch is provided in conjunction with the lid of the introduction port of the laser guide guide tube to generate a laser guide insertion confirmation signal. endoscope safety circuit. 5 Utility model registration claim 1, characterized in that a set of a light emitting element and a light receiving element are disposed facing each other on the outer periphery of the inlet of the laser guide guide tube to generate a laser guide insertion confirmation signal. Safety circuit for an endoscope equipped with a laser scalpel as described in Section 2. 6. Confirm insertion of the laser guide by installing a pair of light emitting element and light receiving element on the outer periphery of the inlet of the laser guide guide tube, and ensuring that the light from the light emitting element is reflected by the laser guide and enters the light receiving element. A safety circuit for an endoscope equipped with a laser scalpel according to claim 1, which generates a signal.