JPS6334740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser surgical device having an improved structure of a mounting portion for attaching and detaching a laser probe.

2. Description of the Related Art Conventionally, in a laser surgical device, a shutter device is provided at a mounting portion of a laser probe for blocking a laser optical path so that the laser beam does not immediately exit to the outside even if the laser beam is erroneously oscillated. However, since the shutter device is used to shield the laser beam, the laser beam hits the shutter body and heats this area to a high temperature, which adversely affects other internal devices in the vicinity. Furthermore, if the shutter body was burned and destroyed, there was a risk that laser light would be emitted to the outside.

The present invention has been made focusing on the above circumstances,
The purpose of this is to prevent the danger of the shutter body being burned and destroyed by the laser beam by incorporating a means to detect the laser beam into the shutter body when the laser probe is not attached, and to prevent the shutter body from being damaged by the laser beam. It is an object of the present invention to provide a laser surgical device that can prevent heating from adversely affecting surrounding internal devices.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 7.

Reference numeral 1 in FIG. 1 is an endoscope, and this endoscope 1 is formed with an insertion channel 3 through which a laser probe 2 for laser surgery is inserted. The laser probe 2 has a laser guide 4 inserted therein, and the laser guide 4 is made of, for example, quartz fiber. A connector 5 is provided at the base end of the laser probe 2, and this connector 5 connects to a laser surgical device 6, which will be described later.
It is designed so that it can be detachably attached to the connector receiver 7 of.

The laser surgical device 6 is constructed as shown in FIG. The receiving body 8 of the connector receiver 7 is formed with a fitting hole 9 into which the insertion end 5a of the connector 5 is tightly inserted. A cylindrical fixing member 10 is attached and fixed to the front wall of the receiving portion main body 8 so as to protrude toward the front side concentrically with the insertion hole 9. The fixing member 10 has an inner diameter larger than an outer diameter, and is slidably fitted into an inner hole 11 in the inner part. Furthermore, the ring member 12 and the receiving portion main body 8
A coil spring 13 is interposed between the ring member 12 and the ring member 12, and the coil spring 13 urges the ring member 12 outward. Note that when the connector 5 is not attached to the connector receiver 7, the ring member 12 is attached to the stepped portion 14 formed between the inner and outer portions of the fixing member 10.
Wait for it. When the connector 5 is attached to the connector receiver 7, the ring member 12 is pushed into the stepped portion 15 formed at the base end of the insertion end 5a as shown in FIG. The connector 5 is urged in the direction of detachment. Furthermore, an engagement groove 16 as shown in FIGS. 2 and 3 is formed by cutting out the distal end edge of the fixing member 10. As shown in FIGS. The engaging groove 16 has an engaging part 16b formed at one end of the sliding part 16a along the circumferential direction, and an introduction part 16c opening toward the outer end at the other end of the sliding part 16a. A fixing pin 17 protruding from the peripheral surface of the connector 5 is fitted and locked. Note that the engagement groove 16 and the fixing pin 1
Two pieces of 7 are formed with an angular interval of 180°. Then, when attaching the connector 5 to the connector receiver 7, the fixing pin 17 is aligned with the introduction part 16c of the engagement groove 16, and the connector 5 is pushed in. When the fixing pin 17 is located in the slide part 16a, it is rotated 90 degrees and fixed. The pin 17 is adapted to be engaged with the engaging portion 16b. Thus, the connector 5 is held in the pushed-in position together with the ring member 12 against the restoring force of the coil spring 13. Also, at this time, the insertion end 5a of the connector 5
The distal end thereof is adapted to protrude into a recess 18 formed near the center of the receiving portion main body 8. Both opposing side surfaces of the tip of the insertion end 5a are cut out as shown in FIG. 6, and the remaining peripheral surface of the protrusion 19 forms a reflective surface 20.

Further, a distance detection sensor 21 is provided on the wall surface of the recess 18 as a detection means for detecting that the connector 5 is correctly installed in the connector receiver 7 at a predetermined position. As shown in FIG. 5, the distance detection sensor 21 consists of a light emitting element part 22 and a light receiving element part 23, and the light receiving element part 23 receives the reflected light of the light emitted from the light emitting element part 22, and calculates the distance to the reflected position. Detect. By the way, the connector 5 is attached to the connector receiver 7.
When the protrusion 19 is properly attached, the protrusion 19 is in the state shown by the solid line in FIG. 5, and its reflective surface 20 approaches the distance detection sensor 21. Then, the distance detection sensor 21 detects the position and detects that the connector 5 is correctly attached.

Further, the receiver main body 8 includes a condenser lens 24,
A cylindrical lens frame 26 holding the lens 25 is screwed into the lens frame 26. The condensing lenses 24 and 25 face the incident end surface 4a of the laser guide 4 on the connector 5 side, and condense laser light from the laser oscillation device 35 side, which will be described later, onto the incident end surface 4a. Note that the lens frame 26 is configured to be movable in the direction of its optical axis. Furthermore, a shutter device 27 is provided between the lens frame 26 and the laser oscillation device 35 to block the laser optical path. This shutter device 27 is provided with a plate-shaped shutter body 29 that is driven to open and close by a rotary solenoid 28, and only when it receives a detection signal from the distance detection sensor 21 does it move the shutter body 29 in the direction D in FIG. It can be rotated and moved out of the laser beam path.

Further, on the retracted side of the shutter body 29, there is an open position detector 30 for detecting the open state of the shutter body 29.
is installed. This open position detector 30 is constituted by an optical sensor 33 consisting of a light emitting element section 31 and a light receiving element section 32 which face each other. Then, when the shutter body 29 rotates and retreats from the laser optical path, it enters between the light emitting element section 31 and the light receiving element section 32, and the light emitting element section 31
The light emitted from the light receiving element section 32 is blocked,
Thereby, the light receiving element section 32 detects the opening of the shutter device 27.

Further, the laser oscillation device 3 of the shutter body 29
A prism 34 is attached and fixed to the 5th side surface. This prism 34 is located on the laser beam path when the shutter body 29 of the shutter device 27 is closed, and directs the laser beam emitted from the laser oscillation device 35 to a laser beam detector 36 installed on the side. There is. The laser photodetector 36 includes, for example, a temperature sensor or a light sensor, and a thermocouple, a thermistor, or the like is used as the temperature sensor. This laser light detector 36 is connected to a power source 37 of the laser oscillation device 35, and is configured to stop the output of the power source 37 when detecting laser light.

On the other hand, the electrical circuit of the laser surgical device 6 is connected to the seventh
It is configured as shown in the figure. That is, the output terminals of the distance detection sensor 21 and the open position detector 30 are connected to one input terminal of the first AND circuit 41 of the control section 40, and the output terminal of the first AND circuit 41 is also connected to the control section. 40 second AND circuits 42
is connected to one input end of the Further, the output terminal of the foot switch 43 is connected to the other input terminal of the second AND circuit 42. The output terminal of the second AND circuit 42 is connected to the laser oscillation device 35. Further, the output end of the distance detection sensor 21 is connected to the rotary solenoid 28 of the shutter device 27 via the control section 40. The rotary solenoid 28 is activated after the distance detection sensor 21 detects the completion of attachment of the connector 5, and opens the shutter body 29 of the shutter device 27.

Next, the operation of the laser surgical device 6 will be explained. As shown in FIG. 1, the laser probe 2 is guided into the body cavity through the insertion channel 3 of the endoscope 1. When the connector 5 of the laser probe 2 is attached to the connector receiver 7 of the laser surgical device 6, the insertion end 5a of the connector 5 is inserted into the insertion hole 9. At this time, the fixing pin 17 is inserted into the engagement groove 16.
Insert it in line with the introduction part 16c. Therefore, the stepped portion 15 of the connector 5 contacts the ring member 12 and is pushed in against the restoring force of the coil spring 13 until the fixing pin 17 contacts the sliding portion 16a of the engagement groove 16. At this time, the protrusion 19 of the connector 5
protrudes into the recess 18, with the projection 19 oriented in the dotted line position in FIG. Then, by rotating the connector 5 by 90 degrees, the fixing pin 17 moves along the sliding portion 16a and engages with the engaging portion 16b, thereby completing the installation. When this attachment is completed, the protrusion 19 is at the position indicated by the solid line in FIG. 5, and the reflective surface 20 is close to and faces the distance detection sensor 21, so the amount of reflected light received by the light receiving element 23 increases. It outputs a signal at a level that detects its wearing state. This detection signal is sent to the control section 40,
As a result, the control unit 40 drives the rotary solenoid 28 of the shutter device 27, and the shutter body 29
is rotated in the D direction to retreat from the laser beam path. When the shutter body 29 is retracted, the open position detector 30 detects this. When the distance detection sensor 21 and the open position detector 30 each perform a detection operation in this way, the respective detection signals are transmitted to the control unit 40.
is inputted to each input terminal of the first AND circuit 41, and the first AND circuit 41 is operated to output. The output signal of this first AND circuit 41 is then
The input signal is input to one input terminal of the AND circuit 42. Therefore, the second AND circuit 4 is activated by the closing signal of the foot switch 43 connected to the other input terminal.
2 performs output operation. In other words, foot switch 43
By stepping on the button and outputting a signal, the laser oscillation device 35 can be operated to oscillate.

Then, the laser beam emitted by stepping on the foot switch 43 is focused through the condensing lenses 24 and 25, and is focused on the laser guide 4 of the laser probe 2.
incident on . The laser light incident on the laser guide 4 irradiates a target area within the body cavity to stop bleeding and destroy cancerous tissue.

Normally, the above-mentioned operation is performed, but if the shutter body 29 of the shutter device 27 is closed due to a malfunction or the like, and the shutter (not shown) in the laser oscillation device 35 is opened to perform the emission operation. The laser light is reflected by the prism 34 and enters the optical sensor 33, where it is detected. The detection signal from the optical sensor 33 is input to the power supply 37 of the laser oscillation device 35 to turn off the power supply 37, thereby stopping the oscillation operation of the laser oscillation device 35. Therefore, the shutter body 2
It is possible to prevent the laser beam from leaking to the outside due to heating and burnout of the laser beam 9, and to prevent the heat from adversely affecting surrounding internal devices.

Note that in the above embodiments, the distance detection sensor and the open position detector each use a light emitting element section and a light receiving element section, but the present invention is not limited to this, and it is possible to use other detection means such as a micro switch. But that's fine. Further, as a laser light detector 36, this can be used as a shutter body 29 as shown in FIG.
It may also be attached directly to the

Further, the positions of the distance detection sensor and the notch are not limited to the positions of the above embodiments, but may be other positions. Further, the laser probe may be a manipulator that performs surgery using a CO ₂ laser, a surgical microscope that performs microsurgery, or the like.

As explained above, the present invention provides a laser beam detection means that detects when a laser beam hits the shutter body of a shutter device that opens and closes a laser beam path, and uses this detection signal to turn off the power of the laser oscillation device. This is what I did. Therefore, it is possible to prevent a situation in which the laser oscillation shutter in the laser oscillation device opens due to a failure or an erroneous operation, and the shutter body of the shutter device is exposed to laser light for a long period of time. As a result, the shutter body of the shutter device was burnt out,
It can prevent the danger of laser light leaking to the outside, and
It is also possible to prevent heating of surrounding internal devices and adverse effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a side sectional view showing the inside of the laser surgical device, FIG. 3 is a side view showing a part of the connector receiver, and FIG. 4 is a rear view of the connector receiver.
Fig. 5 is an explanatory diagram of the distance detection sensor, Fig. 6 is a perspective view showing the tip of the connector, and Fig. 7 is an explanatory diagram of the distance detection sensor.
The same figure is an electric circuit diagram of the laser surgical device, and FIG. 8 is a rear view of the connector receiver showing another embodiment of the present invention. 1... Endoscope, 2... Laser probe, 4... Laser guide, 5... Connector, 6... Laser surgical device, 7
... Connector receiver, 8... Receiver body, 27... Shutter device, 28... Rotary solenoid, 29... Shutter body, 34... Prism, 35... Laser oscillation device, 36... Laser light detector, 37... Power supply, 40...
Control unit, 41...first AND circuit, 42...second AND circuit, 43...foot switch.

Claims (1)

[Claims] 1. A laser oscillation device, a connector holder for detachably mounting a laser probe connector on a laser beam path on the emission side of the laser oscillation device, and a laser probe connector mounted to the connector holder. a shutter device that shuts off the laser beam path when the shutter device is closed; a laser photodetector that detects the emission of laser light when the shutter device is closed; and a laser photodetector that detects the laser beam when the laser photodetector detects the laser beam. 1. A laser surgery device comprising: means for turning off the power of the device. 2. A laser surgical device according to claim 1, characterized in that the laser light detector is configured to attach a reflector to the shutter body of the shutter device and detect laser light reflected by the reflector. . 3. The laser surgical device according to claim 1, wherein the laser light detector is directly attached to the shutter body of the shutter device. 4. A laser surgical device according to claim 1, 2, or 3, wherein the laser light detector is a temperature sensor. 5. The laser surgical device according to claim 1, 2, or 3, wherein the laser light detector is an optical sensor. 6. The laser surgical device according to claim 4, wherein the temperature sensor is a thermocouple. 7. The laser surgical device according to claim 4, wherein the temperature sensor is a thermistor.