JPS62292146A - Endoscope for ultrasonic treatment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an endoscope for ultrasonic treatment that performs prostate resection, stone destruction, etc. using ultrasonic vibration.

[Prior Art] Recently, so-called ultrasonic treatment endoscopes have been known in which an ultrasonic treatment instrument is incorporated into an endoscope for performing treatments such as prostate resection and stone destruction.

Conventionally, in the structure of the above-mentioned endoscope, an optical viewing tube is inserted into a sheath, and a working element is integrally provided at the proximal end of the optical viewing tube. An ultrasonic treatment instrument consisting of a probe and an ultrasonic transducer connected to the proximal end of the probe is inserted into the sheath so that it can move forward and backward. Also,
The working element is provided with a front finger rest, and the proximal end of the probe of the ultrasonic treatment instrument is provided with a rear finger rest.

Then, the user holds the endoscope by hooking the four fingers of one hand, excluding the thumb, on the front finger hook and the thumb on the rear finger hook, while also moving the treatment instrument forward and backward. was.

[Problems to be Solved by the Invention] By the way, according to the endoscope having the above structure, the ultrasonic treatment instrument has an ultrasonic transducer that is quite heavy. Therefore, when the endoscope is held with one hand by hooking one's fingers on the front finger rest and the rear finger rest, the center of gravity of the ultrasonic transducer is located behind that hand. The problem was that it could not be maintained in a well-balanced manner, resulting in a decrease in operability.

An object of the present invention is to provide an endoscope for ultrasonic treatment in which the center of gravity of the ultrasonic transducer is located at approximately the same position as the hand holding the endoscope, thereby improving operability. shall be.

[Means and effects for solving the problems] This invention has the following features:
a sheath 1; an optical viewing tube 2 inserted into the sheath 1;
A working element 5 integrally provided at the proximal end of the optical viewing tube 2, a front finger hook 7 provided on the working element 5, a probe 12 inserted into the sheath 1 so as to be freely retractable, and The ultrasonic treatment instrument 11 includes an ultrasonic transducer 13 connected to the base end of a probe 12, and a rear finger hook 16 provided at a position corresponding to the center of gravity of the ultrasonic transducer 13. Then, when the endoscope is held with one hand by hooking the fingers on the front finger hook 7 and the rear finger hook 16, the center of gravity of the ultrasonic transducer 13 is arranged so that it almost coincides with the position of the hand. This is what I did.

[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 1 is a sheath of an endoscope for ultrasonic treatment. An optical viewing tube 2 is inserted through the sheath 1.

This optical viewing tube 2 has a connecting portion 3 at its base end, a rising portion 4 is provided at this portion, and the entire tube has a substantially L-shape. The connecting portion 3 described in “1” is connected and fixed to the proximal end portion of the sheath 1.

A working element 5 is rotatably provided at the base end of the sheath 1. That is, as shown in FIG. 2, a ring portion 6 is formed on the working element 5, and this ring portion 6 is rotatably fitted onto the connecting portion 3 of the optical viewing tube 2. The ring portion 6 has a pin 6 that engages with a groove 3a formed over the entire length of the outer peripheral surface of the connection portion 3.
a are provided in a protruding manner, and their engagement prevents the working element 5 from coming off from the connecting portion 3.

Note that an O-ring 5b is provided between the connecting portion 3 and the ring portion 6 to provide a predetermined rotational resistance to the ring portion 6.

The working element 5 also includes a front finger hook 7 and a connecting portion 3 whose axis is parallel to the axis of the sheath 1.
A slide shaft 8 extending rearward from the front is integrally formed.

On the other hand, a through hole 9 is bored in the connecting portion 3 of the optical viewing tube 2. A probe 12 of an ultrasonic treatment instrument 11 is inserted through the through hole 9 into the sheath 1. This probe 1
An ultrasonic vibrator 13 is connected to the base end of the probe 2, and the probe 12 is caused to vibrate ultrasonically by this ultrasonic vibrator 13. Further, a mounting ring 14 is externally fitted and fixed to the ultrasonic transducer 13 at a position corresponding to the center of gravity G. This attachment ring 14 is provided with a rear finger hook part 16 via a connecting part 15. The connecting portion 15 is provided with a through hole 17 which is slidably fitted into the slide shaft 8. In addition, the rear finger hook part 16 has a surface 1 on which the finger touches.
6a is aligned with the center of gravity G of the ultrasonic transducer 13 in the vertical direction. Further, the slide shaft 8 is provided with a spring 18. Therefore, the ultrasonic treatment tool 11
The blade can be moved forward against the restoring force of the spring 18. Note that the sheath 1 is provided with a water supply cock 19, and the ultrasonic vibrator 13 is connected to a drain tube 21.

To operate an endoscope for ultrasound treatment having such a structure, hold the endoscope by hooking the thumb of one hand on the rear finger hook 16 and the remaining four fingers on the front finger hook 7. Then, by grasping the hand, the ultrasonic treatment instrument 11 is operated forward against the restoring force of the spring 18/P.

By the way, in the above structure, the rear finger hook portion 16 is provided at a position corresponding to the center of gravity G of the ultrasonic vibrator 13 of the ultrasonic treatment instrument 11, so that the thumb can be hooked here.

Therefore, the center of gravity of the ultrasonic transducer 13 is exactly located at the one hand holding the endoscope, so the endoscope can be held stably with that one hand.

Further, since the working element 5 is rotatably attached to the optical viewing tube 2, the ultrasonic treatment instrument 11 can be rotated with respect to the optical viewing tube 2. Therefore, since the treatment performed while rotating the ultrasonic treatment instrument 11 can be performed without rotating the sheath 1 or the optical tube 2, operability can be improved.

〔Effect of the invention〕

As described above, according to the present invention, the rear finger rest provided on the ultrasonic treatment instrument is provided at a position corresponding to the center of gravity of the ultrasonic transducer. Therefore, if you hold the endoscope with one hand by hooking your four fingers (excluding your thumb) on the front finger hook provided on the working element and your thumb on the rear finger hook, then Since the center of gravity of the ultrasonic transducer is located at , the endoscope can be held in a well-balanced and stable state, and operability can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a partially sectional side view and FIG. 2 being an enlarged sectional view of the mounting portion of the working element. DESCRIPTION OF SYMBOLS 1... Sheath, 2... Optical viewing tube, 5... Working element, 7... Front finger rest, 11... Ultrasonic treatment instrument, 12... Probe, 13... Super sonic vibrator,
16... Rear finger rest part. Applicant's representative Patent attorney Atsushi Tsuboi et al., 1 Saddle 5 items Δ1・)L Procedural amendment 9° 13, 1995 Commissioner of the Patent Office Kuro 1) Akio Tono 1, Case indication patent application No. 135178, 1983 2. Name of the invention Ultrasonic treatment endoscope 3. Relationship with the person making the correction Patent applicant (037) Olympus Optical Industry Co., Ltd. 4 Agent UBE Building, 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo 7,
Contents of the amendment (1) From page 4, line 10 to page 5, line 1 of the specification: [Proximal end of the sheath 1 is provided...] "A working element 5 is detachably attached to the proximal end of the sheath 1, and a ring portion 6 is attached to the working element 5 as shown in FIG.
is formed, and the connecting portion 3 of the optical viewing tube 2 is rotatably connected to this ring portion 6. The ring portion 6 includes
Groove 3a formed over the entire length of the outer peripheral surface of the connecting portion 3
A pin 6a is provided protrudingly to engage with the working element 5, and this engagement prevents the optical viewing tube 2 from coming off the working element 5.
It's stopped. Note that an O-ring 5b is provided between the connecting portion 3 and the ring portion 6 to maintain watertightness. ” he corrected. (2) Similarly, on the 13th to 14th lines of page 5, the phrase "fixed externally" is corrected to "provided as described later." (3) Similarly, between the 5th and 6th lines of the 6th page [
Further, the attachment structure of the attachment ring 14 to the ultrasonic transducer 13 is shown in FIGS. 3 and 4. That is, a ring-shaped spacer 23 having a groove 22 formed on its outer peripheral surface is rotatably provided inside the mounting ring 14, and the spacer 23 is inserted into the mounting ring 14 by a screw 24 that engages with the groove 22. 14 is prevented from falling off. A mounting hole 25 is eccentrically formed in the spacer 23, and the ultrasonic vibrator 13 is fitted and fixed into the mounting hole 25. Therefore, even if the optical viewing tube 2 and the probe 12 of the ultrasonic treatment tool 11 are inserted eccentrically with respect to the sheath 1, the optical viewing tube 2 and the ultrasonic treatment tool can be inserted without rotating the sheath 1 and the working element 5. 11
and can be rotated well. ” he added. (4) Similarly, from line 19 on page 6 to line 5 on page 7, the phrase ``In addition, the working element 5... can be improved.'' was replaced with ``In addition, the optical viewing tube 2 and the working element 5, and the treatment can be performed while rotating the optical viewing tube 2 and the ultrasonic treatment instrument 11 without rotating the sheath 1 or the working element 5, improving operability. and can reduce the amount of invasiveness to the patient." (5) Also on page 7, line 20, “...
This is an enlarged view. '' has been corrected to read ``...an enlarged view, FIG. 3 is a side view of the mounting structure of the ultrasonic transducer and the mounting ring, and FIG. 4 is a cross-sectional view.'' (6) Add Figures 3 and 4 shown in the attached sheet. Figure 3 Figure 4

Claims (1)

[Claims] A sheath, an optical viewing tube inserted into the sheath, a working element integrally provided at the proximal end of the optical viewing tube, a front finger rest provided on the working element, and a front finger rest that can be moved forward and backward into the sheath. An ultrasonic treatment instrument comprising a freely inserted probe and an ultrasonic transducer connected to the proximal end of the probe, and a rear finger rest provided at a position corresponding to the center of gravity of the ultrasonic transducer. An endoscope for ultrasound treatment characterized by the following.