JPS6111617B2 - - 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.

The present invention has been made focusing on the above circumstances,
The purpose is to provide a laser surgical device that has a simple structure, 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 6.

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 a ring member 12 is slidably fitted into an inner hole 11 in 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 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 proximal 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 is formed by forming an engaging part 16b at one end of the sliding part 16a along the circumferential direction, and providing 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 circumferential surface of the connector 5 is fitted into and locked. In addition, the engagement groove 16 and the fixing pin 17 are respectively
Two pieces are 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.
is rotated 90 degrees when it is located on the slide portion 16a, and the fixing pin 17 is 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. As shown in FIG. 5, a detected portion 20 consisting of a high reflection portion 20a and a low reflection portion 20b is formed on the peripheral surface of the distal end of the insertion end portion 5a. The high reflection section 20a is formed as a mirror surface having a high reflectance for at least one wavelength, and the low reflection section 20b is colored black or has a satin finish.

Further, an optical sensor 21 is provided on the wall surface of the recess 18 as a detection means for detecting that the connector 5 is correctly attached to the connector receiver 7 at a predetermined position. As shown in FIG. 5, the optical sensor 21 includes a light emitting element section 22 and a light receiving element section 23, and the light receiving element section 23 detects the amount of reflected light emitted from the light emitting element section 22. By the way, the connector 5 is attached to the connector receiver 7.
When the sensor is correctly attached, the state of the detected section 20 is such that its high reflection section 20a faces the optical sensor 21, as shown in FIG. Then, the optical sensor 21 detects the highly reflective portion 20a 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 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 rotates the shutter body 29 in the direction D in FIG. 4 only when it receives a detection signal from the optical sensor 21. It is designed so that it can be 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.

On the other hand, the electrical circuit of the laser surgical device 6 is
It is configured as shown in the figure. That is, the output terminals of the optical 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. 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 optical sensor 21 for detecting attachment 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 attachment detection optical sensor 21 detects 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 attaching the connector 5 of the laser probe 2 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 in the position in FIG. Therefore, connect connector 5 to 90
By rotating by .degree., 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 detected part 20 is at the position shown in FIG. 5, and its high reflection part 20a is close to and faces the optical sensor 21, so the amount of reflected light received by the light receiving element part 23 increases. , outputs a signal at a level that detects the 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 open position detector 30 detects this. When the optical sensor 21 and the open position detector 30 each perform a detection operation in this way, the respective detection signals are input to each input terminal of the first AND circuit 41 of the control section 40, and the first AND circuit 41 The output works. 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 light emitted by stepping on the foot switch 43 is focused through the condenser lenses 24, 24, and enters the laser probe 4 of the laser probe 2. The laser light incident on the laser guide 4 irradiates a target area within the body cavity to stop bleeding and destroy cancerous tissue.

FIG. 7 shows another embodiment of the present invention, in which a colored part having a high reflectance for at least one wavelength of light is provided instead of providing a high reflection part.

In the above embodiment, the open position detector uses a light emitting element section and a light receiving element section, but the present invention is not limited to this, and may use other detection means such as a micro switch.

Further, the positions of the optical sensor and the detected part 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 enables the state of the detected part formed on the connector to be determined by inserting the connector of the laser probe into the connector receiver to a predetermined position and then rotating it by a certain amount. An optical sensor detects the fixed state of the connector, and this detection signal drives the rotary solenoid of the shutter device to open the shutter body.

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 laser light does not leak to the outside from other than the output end of the laser probe.
In other words, as long as the laser probe is pointed in a safe direction, there is no danger. Furthermore, there is no risk of burning out the connector or the like during the installation of the laser probe. Furthermore, since the fixed state of the connector is detected by a main detection stage consisting of a light emitting element section and a light receiving element section, and the shutter body of the shutter device is operated by a rotary solenoid, complicated mechanical means are not required. In comparison, not only can the configuration be simplified, but reliable operation can be expected.

[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 showing the relationship between the detected part of the connector and the optical sensor, FIG. 6 is an electric circuit diagram of the laser surgical device, and FIG. 7 is a connector receiver showing another embodiment of the present invention. FIG. 3 is a perspective view of an optical sensor. 2... Laser probe, 5... Connector, 6...
...Laser surgical device, 7...Connector holder, 20...
Detected section, 21... Optical sensor, 22... Light emitting element section, 23... Light receiving element section, 27... Shutter device, 28... Rotary solenoid, 29... Shutter body, 35... Laser oscillation device, 50 ...Coloring section.

Claims (1)

[Scope of Claims] 1. A laser oscillation device, a connector holder that fixes a laser probe connector inserted into the laser beam path on the emission side of the laser oscillation device and fixed when the connector is rotated a certain amount, and this connector holder and the above-mentioned A shutter device that interrupts a laser optical path between the laser oscillation device and the laser beam with a shutter body driven by a rotary solenoid, and a detection means comprising a light emitting element portion and a light receiving element portion respectively facing the outer periphery of the connector attached to the connector receiver. , a detected part consisting of a high reflection part and a low reflection part formed on the outer periphery of the connector facing the detection means, and a detected part of the connector when the connector is attached and fixed to the connector receiver. A laser surgery device comprising: a control section that opens the shutter device in response to a detection signal from the detection means. 2 In claim 1, the detected part is formed with a high reflection part and a low reflection part, and when the connector is attached and fixed to the connector receiver at a predetermined position, the high reflection part is located on the optical sensor. A laser surgical device characterized by: