JPH07178038A - Medical device - Google Patents

Abstract

PURPOSE:To provide a medical device having a good workability and an easy processing property, which can be maintained its form by bending its inserting part before it is inserted to a celom. CONSTITUTION:In a medical device such as an endoscope and a treatment apparatus which has an inserting part 1 having the tip and the handle side end, a semi-hard pipe 11 applied with an annealing process at least at a part of the inserting part 1, and by bending the inserting part 1 before it is inserted to a celom, this medical apparatus is composed to maintain its bending form by the semi-hard pipe 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical instrument having an insertion portion to be inserted into a body cavity such as an insertion portion of an endoscope or a sheath of a medical treatment tool.

[0002]

2. Description of the Related Art An endoscope comprises an operating section and an insertion section to be inserted into a body cavity. In a flexible endoscope, a bending section is provided in a part of the insertion section, and the bending section is operated by operating the operation section. The insertion portion of the rigid endoscope is straight or is bent.

Further, for example, as shown in Japanese Utility Model Laid-Open No. 53-101481 and Japanese Patent Laid-Open No. 26965/1993,
In a medical instrument such as a treatment tool, a part of the insertion part is semi-rigid, and the operator can freely bend the insertion part, and by maintaining its shape, insertability into a body cavity,
There is a treatment tool with improved operability.

The semi-rigid tube of the medical device is formed by spirally meshing rigid bands having an S-shaped cross section with each other to form a lumen, and has a structure in which the shape is maintained by a frictional force.

[0005]

However, the semi-rigid tube has a drawback that the wall thickness of the lumen becomes large and the diameter thereof becomes large due to its structure. In addition, since the structure is complicated, it is difficult to make it waterproof, and a waterproof structure is provided by a method of further increasing the diameter by providing a waterproof outer cover. Further, since the shape is maintained by the frictional force, there is also a problem in terms of durability, and the repeated bending causes wear on the friction surface, making it difficult to secure the initial shape maintaining performance.

The present invention has been made by paying attention to the above circumstances. The object of the present invention is that it has a simple structure, but its shape can be maintained even if it is arbitrarily curved, and operability can be improved. An object is to provide a medical device that can be reduced in diameter.

[0007]

Means and Actions for Solving the Problems
In order to achieve the above-mentioned object, in a medical instrument having an insertion part having a distal end and a proximal end, at least a part of the insertion part is provided with an annealed metal tube.

When the operator bends the annealed metal tube,
The elastic shape does not restore the original shape, the curved shape can be maintained, the insertion operability when inserting into the body cavity is improved, and the tip can be reliably guided to the target site.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a tracheal tube intubation scope according to a first embodiment. In FIG. 1, reference numeral 1 denotes an insertion portion to be inserted into the respiratory tract of a patient. The insertion portion 1 is provided with a distal end forming portion 2 at its distal end, and its proximal end portion is connected to an operating portion 3. The operation section 3 is provided with an eyepiece section 4, a suction control device 5, and a universal cord (not shown) in which a light guide fiber is incorporated. The universal cord is connected to a light source device (not shown).

FIG. 2 shows a sectional structure of the insertion part 1.
An objective optical system 7 which is optically connected to an image guide fiber 6 is provided in the tip forming section 2, and a light guide fiber, an illumination optical system, an opening of a suction channel (neither is shown), and the like are provided. It is provided.

The proximal side of the insertion portion 1 is connected to a fixed mouthpiece 8 which is connected to the operating portion 3 and is fitted into a rigid rigid pipe portion 9, and a rigid reinforcing pipe 10 is also provided outside the rigid pipe portion 9. Has been fitted. Further, the tip forming portion 2 and the hard tube portion 9 are connected by a semi-hard tube 11 made of an annealed metal pipe, for example, a stainless pipe.

The tip end side of the semi-rigid tube 11 is a step engaging portion 12 provided on the outer peripheral surface of the tip forming portion 2, and the rear end side is a step engaging portion provided on the outer peripheral surface of the rigid tube portion 9. 13 are abutted against each other and fixed by adhesion. The reinforcing pipe 10 has a rear end in contact with the fixed base 8 and a front end in the step locking portion 13.
It covers the outer circumference of the connection part.

Inside the semi-rigid tube 11, a reinforcing coil 14 whose inner diameter is substantially equal to the inner diameter of the semi-rigid tube 11 is provided. The tip portion of the reinforcing coil 14 is sandwiched between the tip forming portion 2 and the semi-rigid tube 11 and abutted and fixed thereto, and the rear end portion is provided as a free end near the tip portion of the rigid tube portion 9. Has been done.

Next, a procedure for assembling the insertion portion 1 of the scope configured as described above will be described. First, the semi-rigid tube 11
After fixing the rear end portion to the rigid tube portion 9 and fixing it, the fixed mouthpiece 8 is connected. Next, the reinforcing tube 10 is inserted from the tip side of the semi-rigid tube 11, and fixed by abutting it on the fixed mouthpiece 8.

An objective optical system 7, an illumination optical system, an image guide fiber 6, a light guide fiber, a suction channel, and a reinforcing coil 14 are assembled in advance in the distal end forming section 2, and this is placed inside a semi-rigid tube 11. It is inserted and adhesively fixed to the tip forming section 2.

Next, the usage method will be described. First,
A tracheal tube is covered on the outside of the insertion portion 1 of the scope, and the open end of the end of the tracheal tube and the tip forming portion 2 of the insertion portion 1 are substantially aligned. Next, according to the shape of the patient's airway, the operator
Holding the semi-rigid tube 11 of the insertion part 1 by hand and bending it into a desired shape, the insertion part 1 is inserted into the airway of a patient while observing with a scope.

At this time, since the semi-rigid tube 11 is composed of annealed pipe, it can be bent into an arbitrary shape of the operator and maintains the shape. When the semi-rigid tube 11 is bent, stress is generated in the direction in which the lumen is collapsed, but since the internal reinforcing coil 14 suppresses the inward deformation, the insertion portion 1 does not buckle. The operator guides the distal end of the scope to a position suitable for insertion, then slides the tracheal tube covering the insertion section 1 and inserts it into the patient's trachea.

Incidentally, in the first embodiment, the insertion portion 1
It has a structure in which a semi-hardened portion is provided by annealing over substantially the entire length of, but, for example, in a general endoscope, the proximal side of an insertion portion having a bending portion using a bending piece at the tip A semi-rigid part may be provided in a part of the.

3 and 4 show a treatment tool according to the second embodiment. This treatment tool is used for surgical operation or the like to insert into a luminal organ in a body cavity through an incision and collect and remove tissue. As shown in FIG. The insertion portion 21 to be inserted is provided with a grasping portion 23 having a cup 22 for grasping and collecting tissue in a body cavity, and a rear end portion thereof is provided with an operating portion 24 for opening and closing the grasping portion 23. Has been.

As shown in FIG. 4, an operation wire 25 is slidably inserted into the insertion portion 21, and the tip end of the operation wire 25 is connected to the opening / closing mechanism 26 of the grip portion 23, and the rear end thereof is connected. The section is connected to the operation knob 27 of the operation section 24. The insertion part 21 is provided with an annealed metal sheath, for example, a stainless sheath 28, and an angular coil 29 fitted and fitted to the inner peripheral surface of the outer peripheral surface of the stainless sheath 28.

Next, the method of use will be described. First,
Before inserting the treatment tool into the body cavity, the surgeon should position the patient
The insertion portion 21 is curved in a shape that is easy to operate according to the position of the operator. Since the stainless steel sheath 28 is made of annealed pipe, it can be bent into an arbitrary shape of the operator and maintains the shape.
When the stainless steel sheath 28 is bent, a stress is generated in the direction in which the lumen is crushed, but since the internal angular coil 29 suppresses the inward deformation, the insertion portion 1 does not buckle. After guiding the grasping portion 23 to a position suitable for insertion, the operator can operate the operating portion 24 to grasp and collect the tissue in the body cavity.

Although the forceps for grasping and collecting the tissue in the body cavity have been described as the treatment tool in the second embodiment, the present invention is not limited to this, and an incision treatment tool for incising the tissue, an endoscope, and the like. The same effect can be obtained by annealing not only a sheath or a tubular body for inserting and guiding a treatment tool but also a long rod-shaped body.

FIG. 5 shows an endoscope drying device. The endoscope drying device 31 includes a chamber 33 for accommodating the endoscope 32 and a decompression pump 34 for making the inside of the chamber 33 a negative pressure.

Next, the operation will be described. The undried endoscope 32 after cleaning and disinfection is housed in the chamber 33, and the decompression pump 34 is operated. Decompression pump 34
The negative pressure in the chamber 33 is caused by the operation of, and the boiling point in the chamber 33 is lowered. Due to the boiling point drop, the water droplets attached to the endoscope 32 in the chamber 33 are vaporized, and the drying of the endoscope 32 is completed.

Since it is not necessary to apply heat as described above, the endoscope 31 can be dried without adversely affecting the function and appearance of the endoscope 31, and the apparatus can be simplified.

In addition to the above structure, a heater having a low heat quantity for heating the inside of the chamber 33 is provided, the inside of the chamber 33 is made a negative pressure, and the inside of the chamber 33 is heated. Since it can be dried without raising the temperature, it does not adversely affect the function and appearance of the endoscope 32, and can be dried in a short time.

In the chamber 33, ultrasonic cleaning,
An endoscope cleaning means such as a shower cleaning and a pipe cleaning and a disinfecting solution injecting means may be provided. With such a configuration, after the endoscope 32 is cleaned by the cleaning means, the disinfecting liquid is injected into the chamber 33 for disinfection.
After that, by drying the endoscope 32 by the same operation as described above, the washing, disinfecting, and drying steps of the endoscope 32 can be performed by one device, which facilitates the work.

[0029]

As described above, according to the present invention, by providing an annealed metal tube on at least a part of the insertion portion, the insertion portion can be curved before the insertion portion is inserted into the body cavity. As a result, the shape can be maintained, the insertion operability can be easily treated, and the structure is simple, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of an endoscope according to a first embodiment of the present invention.

FIG. 2 is a sectional view in which a part of an insertion portion of the embodiment is cut away.

FIG. 3 is a side view of a treatment tool according to a second embodiment of the present invention.

FIG. 4 is a sectional view in which a part of an insertion portion of the embodiment is cut away.

FIG. 5 is a schematic configuration diagram of a drying device for an endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Insertion part 2 ... Tip structure part 3 ... Operation part 11 ... Semi-hard tube

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 7, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical instrument having an insertion part such as an insertion part of an endoscope or a sheath of a medical treatment instrument, a part of which is inserted into a body cavity.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

BACKGROUND ART endoscope consists of a operating unit and the insertion portion partially into the body cavity, in the flexible endoscope bending portion is provided in a portion of the insertion portion, the operation portion The bending portion can be bent by an operation, and the insertion portion of the rigid endoscope is kept straight or in a bent state.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

Further, for example, as shown in Japanese Utility Model Laid-Open No. 53-101481 and Japanese Patent Laid-Open No. 26965/1993,
In medical instruments such as endoscopes , a part of the insertion part is semi-rigid, and the operator can freely bend the insertion part, and by maintaining its shape, insertability into the body cavity,
Some have improved the operability of the endoscope .

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Next, a procedure for assembling the insertion portion 1 of the scope configured as described above will be described. First, the semi-rigid tube 11
After the rear end portion of the rear end is abutted and fixed to the hard tube portion 9, the fixed base 8 is connected. Next, the reinforcing tube 10 is inserted from the tip side of the semi-rigid tube 11, and fixed by abutting it on the fixed mouthpiece 8.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

Incidentally, in the first embodiment, the insertion portion 1
It has a structure in which a semi-hardened portion is provided by annealing over substantially the entire length of, but, for example, in a general endoscope, the proximal side of an insertion portion having a bending portion using a bending piece at the tip Is inserted into the body cavity that connects the insertion part and the operation part.
A semi-rigid part may be provided on a part of the tubular part which does not exist.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroyuki Sasa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Hidenobu Kimura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A medical device having an insertion portion having a tip portion and a proximal end portion, wherein an annealed metal tube is provided on at least a part of the insertion portion.