JP2748330B2 - Sheath device for rigid endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath device for a rigid endoscope which is fitted and attached to a rigid endoscope in an airtight state.

[0002]

2. Description of the Related Art Various types of rigid endoscopes which are inserted into a body cavity through a trocar mantle and perform diagnosis and treatment of an affected part have been developed and used. Since the endoscope may be contaminated by contacting an affected part or the like in a body cavity or by adhering blood or the like, it is necessary to disinfect the endoscope prior to the next use. Gas sterilization using EOG (ethylene oxide gas) is performed.
By the way, such an endoscope has a long and elongated shape and has a complicated internal structure in which a narrow passage is provided in the longitudinal direction, and the sterilization and disinfection operation requires much labor and labor. doing. For this reason, an endoscope sheath device as described in, for example, Japanese Patent Publication No. 2-54534 has been developed. That is, this sheath device is configured of a hard portion serving as a cylindrical cap-shaped support and a soft portion formed of an elastomer material or the like and wound in a roll shape. It is designed to be attached to the side.

[0003]

However, the sheath device having such a structure is configured to be attached to a small portion of the distal end portion of the insertion portion on the distal end side of the endoscope, in other words, the insertion device which enters the body. Since only a part of the portion is covered, the portion of the insertion portion inserted into the body that cannot be covered by the sheath still needs to be sterilized.
In addition, such a sheath device is not particularly considered for use in a rigid endoscope that is inserted into, for example, an abdominal cavity through a trocar mantle tube. That is, when this sheath device is used for a rigid endoscope, it is difficult to smoothly pass through the outer tube because the soft portion is formed of a material having a large friction coefficient such as an elastomer.

In addition, since the space between the inner tube of the outer tube and the inner tube of the outer tube is strictly limited due to the necessity of providing an airtight structure between the outer tube and the outer tube, it cannot be used in practice. Furthermore, in such a sheath device, even if the sheath device can pass through the inside of the mantle tube, in the case of a type having a blade at the tip of the mantle tube, the blade may damage the flexible portion. Therefore,
The present invention has been made in view of the above circumstances, and has as its object to provide an endoscope sheath device that can achieve airtightness with an outer tube and that is not likely to be damaged by a blade of the outer tube. .

[0005]

That is, according to the present invention, an insertion rigid portion inserted into a body cavity through a mantle tube and an operation portion provided with an operation button so as not to protrude from the recess are substantially linear. A rigid endoscope sheath device that fits and adheres to a rigid endoscope formed in a shape, and has a fixed outer diameter using a hard material so as to maintain airtightness when inserted into the outer tube. In addition, the inner and outer peripheral surfaces are subjected to smooth surface processing without irregularities, and the bottomed cylindrical rigid sheath portion for inserting the inserting rigid portion is attached to the open end side of the rigid sheath portion, A flexible sheath portion that is attached to and retracted from the operating portion, and configured to operate the operation button inside from the outside of the flexible sheath portion.

[0006]

In the sheath device for a rigid endoscope according to the present invention, the entire rigid insertion portion is covered by the rigid sheath portion, and the insertion rigid portion may be contaminated with blood, bacteria, etc. when inserted into the body cavity. This eliminates the need for sterilization of the inserted rigid part.
In addition, the sheath device of the rigid endoscope of the present invention covers the operation portion connected to the insertion hard portion with the soft sheath portion, and also allows the button operation of the operation portion from outside the soft sheath portion. This also eliminates the risk of contamination, which eliminates the need for sterilization of the rigid endoscope.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a sheath device of a rigid endoscope according to the present invention.
A rigid sheath portion 1 and a soft sheath portion 2 are provided. In the figure, reference numeral 3 denotes an insertion rigid portion of the rigid endoscope, 4 denotes an operation portion of the endoscope, 5 denotes a connecting portion, and 6 denotes a connector for connection to an external device. The hard sheath portion 1 is formed of a hard material that is not likely to be damaged by a blade of a mantle tube or the like, for example, a metal material such as stainless steel, and is formed in a bottomed cylindrical shape having an opening 1A at one end. The insertion rigid portion 3 is inserted into the hole 1A from the distal end side so as to fit over substantially the entire insertion rigid portion 3. Further, the rigid sheath portion 1 can be smoothly inserted into the mantle tube (not shown), and can be inserted into the rigid sheath portion 3.
Can be smoothly inserted into the housing, and furthermore, it is formed with high dimensional accuracy in order to form an airtight structure and a watertight structure between them, and furthermore, the outer circumferential surface 1B and the inner circumferential surface of the fitting hole 1A are formed. The surface has a smooth mirror finish.

Further, the rigid sheath portion 1 of this embodiment is formed such that the center axis of the fitting hole 1A is deviated from the axis of the insertion rigid portion 3. In the vicinity of the thickest portion in the rigid sheath portion 1, air is supplied along the central axis.
A water supply channel 13A and a forceps channel 14A are formed, and a cock 13D and a valve 14D are attached to the air supply / water supply port 13C and the forceps port 14C which are inlets of the air supply water channel 13A and the forceps channel 14A. I have. As shown in FIG. 3, various windows such as an observation window 1 are provided on the bottom of the rigid sheath portion 1 facing the distal end surface of the insertion rigid portion 3 of the endoscope.
1, an illumination light window 12, a water supply nozzle 13B for cleaning the observation window 11, and the like, and a forceps port 14B are provided.

The soft sheath section 2 is detachably attached to the open end side of the hard sheath section 1 while maintaining a watertight state and an airtight state, and is attached to the operation section 4. The flexible sheath portion 2 is formed of a material such as an elastomer in the form of a stretchable thin film, and switches 4A and 4A provided on the operation portion 4 from outside the flexible sheath portion 2 are provided.
4B can be pressed. In use, the flexible sheath portion 2 is stretched from a roll-shaped wound state shown in FIG. 2 and deployed and applied when used. However, after use, the flexible sheath portion 2 is removed from the rigid sheath portion 1. They are discarded and cannot be reused. Therefore, according to this embodiment, the rigid sheath portion 1 can be used again for the next patient.
It is only necessary to remove the used soft sheath portion 2 from the apparatus and discard it, sterilize and disinfect the hard sheath portion 1 and attach another soft sheath portion which has been previously sterilized and disinfected. Is unnecessary.

[0010]

As described above, according to the present invention, substantially the entire insertion hard portion of the hard endoscope is fitted by the hard sheath portion having good sliding properties on the inner and outer surfaces, and the operation button is provided together with the operation button. Because it can be attached to the flexible sheath, there is no danger that the rigid endoscope will be contaminated by contact with the patient, adhesion of blood, etc., or contact with the practitioner. In other words, the sterilization and disinfection of the hard endoscope, which requires a lot of time and labor, is no longer necessary, and it is possible to perform examinations and treatments on patients and the like very efficiently and quickly. Further, according to the present invention, since the rigid sheath portion is formed of a hard material to have a constant outer diameter and has a smooth surface, airtightness can be obtained at the time of insertion into the outer tube, and the outer tube has a blade. Even with the endoscope, the endoscope does not bend left and right, and there is no risk of damaging the rigid sheath or the like with the blade.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a state in which a sheath device according to the present invention is attached to a rigid endoscope.

FIG. 2 is a perspective view showing a sheath device according to the present invention.

FIG. 3 is a bottom view of the sheath device shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard sheath part 2 Soft sheath part 11 Window for observation 12 Window for illumination light

Claims (1)

(57) [Claims] 1. A rigid endoscope in which an insertion rigid portion inserted through a mantle tube into a body cavity and an operation portion provided with an operation button so as not to protrude from a recess are formed in a substantially linear shape. Combination
A sheath device for a rigid endoscope to be adhered, wherein the sheath device is formed to have a constant outer diameter by using a hard material so as to maintain airtightness when inserted into the outer tube, and that the inner and outer peripheral surfaces have no irregularities. A cylindrical sheath with a bottom that is provided with a smooth surface and is fitted with the insertion rigid portion, and a flexible sheath which is attached to the open end of the rigid sheath and is attached to the operating portion. A sheath device for a rigid endoscope, comprising: