JPH0312891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser surgical device in which the structure of the device section for attaching and detaching a laser probe is improved.

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 to the outside. It is designed to prevent danger. That is, the shutter device is configured to close 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, while the laser oscillation device is in oscillation operation,
If the laser probe connector is inserted into the attachment part, there is a risk that the laser light will leak out through the gap before the laser probe's incident end surface is located at the laser light focal position, and the area around the connector may be burnt out. There was a drawback.

The present invention has been made focusing on the above circumstances,
The purpose is to provide a laser surgical device that has a simple configuration, prevents leakage of laser light from the attachment part, and can be used safely without burning out the connector part of the laser probe.

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 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 body 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 comes into contact with the stepped 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 formed at angular intervals of 180 degrees. 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
is pushed in, and when the fixing pin 17 is located on the sliding part 16a, it is rotated 90 degrees, and the fixing pin 17 is locked in the engaging part 16b. Thus, the connector 5 is held in the pressed position together with the ring member 12 against the multiple forces of the coil spring 13. Also, at this time, connector 5
The tip of the insertion end 5a of the receiver body 8 is adapted to protrude into a recess 18 formed near the center of the receiver 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 circumferential 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 whether the connector 5 is correctly attached to 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 this reflection position. Detect. By the way, the connector 5 is attached to the connector receiver 7.
When the protrusion 19 is correctly attached, the protrusion 19 is in the state shown by the solid line in FIG.
It detects that it has been installed correctly.

Further, the receiver main body 8 includes a condenser lens 24,
A cylindrical lens frame 26 holding the lens 24 is screwed into the lens frame 26. The condensing lenses 24, 24 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.

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 terminal of the distance detection sensor 21 is connected to the AND circuit 4 of the control section 40.
It is connected to one input end of 2. Further, the other input terminal of the AND circuit 42 is connected to a foot switch 4.
3 output ends are connected. The output end of the 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 that the connector 5 has been attached, and the shutter device 27
The shutter body 29 of the shutter body 29 is 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 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, but the orientation of the protrusion 19 is at the position indicated by the dotted line 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, 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. Further, this detection signal is inputted to one input terminal of the AND circuit 42. Therefore, the 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 light emitted by stepping on the foot switch 43 is focused through the condensing lenses 24, 24, and enters the laser guide 4 of the laser probe 2. The laser light incident on this laser guide irradiates the target area within the body cavity to stop bleeding and destroy cancerous tissue.

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. Furthermore, 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 detects the distance between the light emitting element part and the light receiving element by rotating the connector of the laser probe by a certain amount after inserting it to a predetermined position in the connector holder. A sensor detects a notch formed on the outer periphery of the connector, detects the fixed state of the connector, and drives a rotary solenoid of the shutter device based on this detection signal,
The shutter body can be opened.

Therefore, the shutter device will not open unless the laser probe connector is securely attached to the connector holder, so even if the laser oscillation shutter in the laser oscillation device opens due to a malfunction or incorrect operation and oscillates, the shutter will not open. Laser light does not leak outside from other than the emission end of the laser probe. In other words, there is no danger as long as the laser probe is pointed in a safe direction. Further, there is no risk of burning out the connector etc. during attachment to the laser probe. Furthermore, the shape of the connector can be reliably detected by a distance detection sensor consisting of a light emitting element part and a light receiving element part without causing a detection error, and the shutter body of the shutter device can be detected by a rotary solenoid. Because of its operation, it not only has a simpler configuration than complicated mechanical means, but also can be expected to operate reliably.

[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 figure is also an electrical circuit diagram of the laser surgical device. 2... Laser probe, 5... Connector, 6...
...Laser surgery device, 7...Connector holder, 20...
Reflective surface, 21... Distance detection sensor, 22... Light emitting element section, 23... Light receiving element section, 27... Shutter device, 28... Rotary solenoid, 29...
Shattered body.

Claims (1)

[Claims] 1. Between a laser oscillation device, a connector holder that fixes the laser probe connector inserted into the laser optical path on the emission side of this laser oscillation device and fixed when the connector is rotated a certain amount, and this connector holder and the above laser oscillation device. a shutter device that interrupts the middle of a laser optical path with a shutter body driven by a rotary solenoid; a distance detection sensor comprising a light emitting element portion and a light receiving element portion respectively facing the outer periphery of a connector attached to the connector receiver; The shutter device is activated by a notch formed on the outer periphery of the connector facing the distance detection sensor, and a detection signal from the distance detection sensor that detects the state of the notch of the connector when the connector is attached and fixed to the connector receiver. A laser surgical device characterized by comprising a control section that opens.