JPH0312892B2 - - 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.

Conventional laser surgical devices are equipped with a shutter device that blocks the laser beam path at the attachment point of the laser probe, and even if the laser oscillation device accidentally starts oscillating, the laser beam will leak outside. It is designed to prevent danger. That is, the shutter device is closed when the laser probe is removed, and when the laser probe is attached, its connector gradually pushes up the shutter body to open the laser beam exit port. Therefore, if the connector of the laser probe is inserted into the mounting part while the laser oscillation device is in oscillation operation, the laser beam may come out through the gap before the incident end face of the laser probe is located at the focal position of the laser beam. There was a risk of leakage, and there was also the drawback that the area around the connector could be burned out.

Furthermore, the shutter body may become unable to return from the open position due to an abnormality such as a foreign object getting caught in the operating part of the shutter device or rust on the rotating shaft. In this case, since laser light can be emitted even if the laser probe is removed, there is a risk that the laser light will be emitted directly to the outside. Even if a means for detecting the attachment of a laser probe is provided and the laser oscillator is enabled to emit light only when the laser probe is attached, if the means for detection fails, the laser oscillator will emit light even if the laser probe is not attached. There is a danger that light will be emitted, and if the shutter device is closed, the laser beam will hit the shutter body and heat this part to a high temperature, which may adversely affect other internal equipment in the vicinity or cause the shutter to close. There is a risk of burning your body.

The present invention has been made focusing on the above circumstances,
The purpose is to provide a safe laser surgical device in which there is no danger of laser light being directly emitted to the outside even if the shutter device or the laser probe attachment detector fails.

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 inside it.
The laser guide 4 is formed of, for example, quartz fiber.
A connector 5 is provided at the base end of the laser probe 2, and the connector 5 can be detachably attached to a connector receiver 7 of a laser surgical device 6, which will be described later.

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 that of the outer part, and a ring member 12 is slidably fitted into an inner hole 11 of the inner part. Further, a coil spring 13 is interposed between the ring member 12 and the receiving member 8, 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 waits against the step portion 14 formed between the inner and outer portions of the fixing member 10. 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, as shown in FIGS. 2 and 3, an engagement groove 16 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. In addition, the engagement groove 1
Two fixing pins 6 and 17 are each formed at 180° angle intervals. When the connector 5 is attached 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. Further, at this time, the tip of the insertion end 5a of the connector 5 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, on the wall surface of the recess 18, for example, a distance detection sensor 21 is provided as a mounting detector for detecting whether the connector 5 is correctly mounted on the connector receiver 7 at a predetermined position. This distance detection sensor 21
As shown in FIG. 5, it consists of a light emitting element section 22 and a light receiving element section 23, and the light receiving element section 23 receives the reflected light of the light emitted from the light emitting element section 22, and detects the distance to the reflection position. By the way, when the connector 5 is correctly attached to the connector receiver 7, the protrusion 1
9 is in the state shown by the solid line in FIG. 5, and its reflective surface 20 is close to the distance detection sensor 21. and,
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 the shutter body 29 is rotated in the direction D in FIG. 4 only when a detection signal is received from the distance detection sensor 21. It is designed so that it can be moved out of the laser beam path.

Furthermore, a position detector 30 is installed on the retracted side of the shutter body 29 to detect the open state of the shutter body 29. This position detector 30 has a light emitting element section 31 and a light receiving element section 32 facing each other.
It is constituted by an optical sensor 33 consisting of.
When the shutter body 29 rotates and retreats from the laser beam path, it enters between the light emitting element section 31 and the light receiving element section 32 and blocks the light emitted from the light emitting element section 31 and directed toward the light receiving element section 32. As a result, the light receiving element section 32 detects the opening of the shutter device 27.

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 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 one input terminal of the first AND circuit 41 of the control section 40. It is connected to one input terminal of the second AND circuit 42. Further, a foot switch 43 is connected to the other input terminal of the second AND circuit 42.
The output end of is connected. Second AND circuit 4
The output end of 2 is connected to a 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 that the connector 5 has been attached, and the shutter device 2
The shutter body 29 of No. 7 can be opened.

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.
Push it in along 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 3 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, but the protrusion 19 is oriented in the position indicated by the dotted line in FIG. Therefore, connector 5
By rotating the fixing pin 17 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, and the control section 40 thereby drives the rotary solenoid 28 of the shutter device 27 to rotate the shutter body 29 in the D direction and withdraw it from the laser optical path.
When the shutter body 29 is retracted, the position detector 30 detects this. In this way, the distance detection sensor 21
When the position detector 30 and the position detector 30 each perform a detection operation, the respective detection signals are inputted to each input terminal of the first AND circuit 41 of the control section 40, and the first AND circuit 41 is caused to perform an output operation. The output signal of the first AND circuit 41 is input to one input terminal of the second AND circuit 42. Therefore,
The second AND circuit 42 performs an output operation in response to the closing signal of the foot switch 43 connected to the other input terminal. That is, by stepping on the foot switch 43 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.

In the above embodiment, the distance detection sensor and the position detector each use a light emitting element section, but the present invention is not limited to this, and other detection means such as a micro switch may be used.

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 is configured to enable the laser oscillation device to perform the emission operation when the attachment of the laser probe and the open state of the shutter device are respectively detected. Therefore, if a foreign object gets caught in the operating part of the shutter device, or if the rotating shaft becomes rusted, the shutter device may remain open, or the attachment detector that detects the attachment of the laser probe may malfunction. However, the laser oscillation device does not perform an emission operation, and therefore, the danger of laser light being directly emitted to the outside is prevented. In addition, there is no risk of burning out the shutter body or heating other internal devices around it by emitting laser light while the shutter body of the shutter device remains closed.

[Brief explanation of drawings]

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 figure is also an electrical circuit diagram of the laser surgical device. 2... Laser probe, 5... Connector, 6...
...Laser surgical device, 7...Connector holder, 21...
Distance detection sensor, 27... Shutter device, 30...
... position detector, 33 ... optical sensor, 35 ... laser oscillation device, 40 ... control section.

Claims (1)

[Claims] 1 a laser oscillation device, a connector holder for inserting a laser probe connector onto the laser optical path on the emission side of the laser oscillation device and fixing the connector;
A laser surgical device comprising a shutter device that blocks a laser optical path between the connector receiver and the laser oscillation device, and a mounting detector that detects the state of a connector installed in the connector receiver, wherein the shutter body of the shutter device a position detector that detects the open/closed state of the laser oscillator, and a control unit that enables the laser oscillation device to emit light only when the position detector emits an open signal of the shutter device and an attachment signal from the attachment detector. A laser surgical device characterized by: