JP2745233B2 - Endoscope sheath device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention covers an insertion tube of an endoscope at the time of examination in order to prevent a patient from transmitting an infection to the patient via the endoscope. In addition, the present invention relates to a sheath device for an endoscope that can be disposable after each use, and particularly, to insert and remove an insertion tube of an endoscope therein while the sheath is inflated with air. The present invention relates to a sheath device for an endoscope.

[Prior Art] In an endoscope sheath device, in order to smoothly insert and remove an insertion tube of an endoscope into and from a sheath, air is inserted into the sheath and expanded when inserting and removing. There is something.
In such an endoscope sheath device, air is introduced into the sheath via an air supply tube or the like connected to an external air supply pump, and air is supplied to connect the air supply tube. The air nipple has conventionally been provided near the mouth of the sheath.

[Problems to be Solved by the Invention] In a conventional sheath device for an endoscope, a nipple is provided on a sheath for air supply, so that an air supply tube is connected to the air supply nipple during an inspection. If it is, it will hinder the operation of the endoscope. Therefore, before and after the inspection, every time the insertion tube of the endoscope is inserted into and removed from the sheath, the air supply tube must be attached to and detached from the air supply nipple, which is very troublesome and complicated for the user. Met.

The present invention solves such a conventional disadvantage, and once the air supply tube is attached before inserting the insertion tube of the endoscope into the sheath, it is not necessary to remove the air supply tube to the end, and the inner tube is easy to handle. An object of the present invention is to provide a sheath device for an endoscope.

[Means for Solving the Problems] In order to prevent the sheath from being ruptured due to too much air when the sheath is inflated, a tubular sheath cover for regulating the swelling of the sheath uniformly is used. This sheath cover is also useful for isolating the sheath from the external environment when the contaminated sheath is pulled out of the body cavity by performing an endoscopic examination.

The sheath device for an endoscope of the present invention utilizes the sheath cover in order to achieve the above-mentioned object, and expands by supplying air to the inside thereof so that the sheath device can be inserted into and removed from an insertion tube of the endoscope. A sheath to be covered, a sheath cover that is provided detachably with respect to the sheath to regulate excessive expansion of the sheath, surrounds the sheath with an interval between the sheath, and a sheath cover. An air supply tube connecting means provided on the sheath cover for connecting an air supply tube or the like for supplying air is provided.

[Operation] By connecting an air supply tube or the like to the air supply tube connecting means provided on the sheath cover and sending air into the sheath, the sheath expands and the insertion tube of the endoscope is inserted into the sheath. Can be. Then, when the sheath cover is removed from the sheath, the air supply tube and the like connected to the air supply tube connecting means are detached from the sheath together with the sheath cover. Therefore, when the insertion tube of the endoscope is covered with the sheath, the endoscope can be inspected without dragging the air supply tube.

After the examination is completed, the sheath cover is attached to the sheath again, and the air is supplied into the sheath to expand the sheath, and the insertion tube of the endoscope can be removed from the sheath.

In such an operation, the air supply tube may remain connected to the air supply tube connection means, and does not need to be removed to the end.

Example An example will be described with reference to the drawings.

FIG. 2 is an external view of the embodiment, and FIG. 1 is a side sectional view showing a state where the sheath 2 is inserted into the sheath cover 4.

In the figure, 1 is an insertion tube of an endoscope, 8 is an observation window, and 9 is an illumination window.

The sheath 2 is detachably coated on the insertion tube 1 of the endoscope to insulate the insertion tube 1 from an external environment. The sheath 2 includes a tubular body 21, a channel portion 22, a tip support 23, and a mouth support 24.

The cylindrical body 21 is formed in a thin cylindrical shape with a stretchable material such as silicon rubber, for example, and a distal end support body 23 formed at its distal end by a transparent member such as a transparent styrene resin or the like. Are connected in an airtight manner. The rear end portion of the tubular body 21 is tightly joined to the distal end portion of the mouth support 24, and the tubular body 21 and the mouth support 24 are air-tightly connected.

The channel portion 22 is formed of, for example, tetrafluoroethylene resin, and is a suction channel also serving as a forceps channel.
A channel (not shown) for supplying air and water is included for 22s.

The channel portion 22 is inserted through the entire length of the sheath 2, the rear end of the channel portion 22 extends rearward from the mouth support 24, and a channel connector 25 is connected to the extended end. Side operation mechanism (not shown). Reference numeral 26 denotes a suction channel which further extends from the channel connector 25 and is connected to an external suction pump (not shown).

The inside of the distal end support 23 is formed to have a size such that the distal end portion of the endoscope is loosely fitted, and a nozzle piece 27 protrudes from the distal end surface. The nozzle piece 27 is for opening each channel of the channel section 22 outward.

In the mouth support 24, a forceps insertion hole 28 is formed so as to communicate with the suction channel 22s, and a treatment tool such as forceps can be inserted into the suction channel 22s. Reference numeral 29 denotes a rubber forceps stopper for passing forceps or the like in an airtight manner, and has, for example, a minus-shaped slit formed in the center thereof. 30 is to hold down the forceps stopper 29,
The cap is detachably attached to the mouth support 24.

Reference numeral 35 denotes an endoscope insertion passage for passing the insertion tube 1 of the endoscope, which is formed through the mouth support 24 so as to be substantially coaxial with the tubular body 21.

31 is a packing formed of a highly air-tight, flexible and elastic material, such as a closed-cell sponge or silicone rubber having a large number of independent minute bubbles, and is provided at the entrance of the endoscope insertion passage 35. Is provided. This packing 31
Is provided with a hole 31a having a shape slightly smaller than the cross-sectional shape of the insertion tube 1 of the endoscope, so that when the insertion tube 1 is inserted, the space between the insertion tube 1 and the outer surface thereof can be tightly sealed.
Reference numeral 32 denotes a packing holder having a hole slightly larger than the cross-sectional shape of the insertion tube 1.

33 is an endoscope insertion passage 35 for sending air into the sheath.
This is an air supply port formed in the outer wall of the mouth support 24 so as to communicate with the air port.

The sheath cover 4 is detachably attached to the sheath 2 and is provided so as to surround the tubular portion 21 with a space between the sheath 2 and the tubular portion 21 of the sheath 2. Can be restricted from bulging too much. The sheath cover 4 includes a sheath cover tubular body 41 and a sheath cover support 42.

The sheath cover tubular body 41 has a strength capable of resisting the force of the tubular body 21 of the sheath 2 expanding, and is formed in a tubular shape with its front end sealed. Therefore, the waste does not leak after use.

When the sheath cover tubular body 41 is set at a predetermined position surrounding the tubular body 21 (ie, a position where the sheath 2 is fully inserted into the sheath cover 4), the distal end portion of the tubular body 21 of the sheath 2 Sheath cover tubular body 41 located around
Is formed in a tapered shape. The inner diameter of the narrow portion on the tip side of the tapered portion is formed to such a diameter that the distal end support 23 of the sheath 2 can be loosely fitted.
The inner diameter of the thick portion closer to the base side than the tapered portion is formed smaller than the limit diameter at which the insertion portion 1 of the endoscope can be loosely inserted and removed, and the tubular body 21 expands too much and bursts.

The sheath cover support 42 is joined to the proximal end of the sheath cover tubular body 41, and the mouth support 24 of the sheath 2 is fitted. 43 is an air supply nipple for connecting the air supply tube 44 connected to the air supply pump 70 and the like;
The mouth support 24 communicates with an air supply port 33 of the mouth support 24. The seal is provided by a seal portion 45 protruding from the inner surface of the sheath cover support member 42 and in close contact with the outer peripheral surface of the mouth support member 24. At the end of the air supply tube 44, an air supply nipple 43
A so-called luer lock type base 52 is attached so that the connection with the device cannot be easily removed.

Reference numeral 46 denotes an air pressure adjusting device provided in the middle of the air feeding tube 44 to adjust the air feeding pressure. In the air pressure adjusting device 46, a ventilation hole 47 communicating with the air feeding tube 44 is formed so as to open upward to the atmosphere.

48 is placed from above on the upper end opening of the ventilation hole 47,
This is a ball valve that closes the ventilation hole 47. As shown in FIG. 4, a weight 49 is placed on the ball valve 48 from above to apply a weight against the air supply pressure. The weight 49 is provided with a hole 50 for allowing the air flowing out of the vent hole 47 to escape to the outside when the ball valve 48 is floated by the air supply pressure.

Reference numeral 51 denotes an additional weight used when further applying a load to the ball valve 48, and is mounted on the weight 49. There are a plurality of additional weights 51 having different weights, and the weight applied to the ball valve 48 can be digitally changed by switching to another additional weight 51 or combining a plurality of the additional weights 51. Can be. The weight against the air supply pressure may be digitally changed by converting the ball valve 48 itself to one having a different weight.

 Next, the operation of the above embodiment will be described.

First, as shown by the arrow in FIG. 2, the sheath 2 is inserted into the sheath cover 4, and as shown in FIG.
The tubular body 21 of the sheath 2 is surrounded by a sheath cover tubular body 41. At this time, the mouth support 24 is fitted into the sheath cover support 42, and the air supply port 33 and the air supply nipple 43 communicate with each other.

Then, the air supply tube 44 is connected to the air supply nipple 43. The air supply tube 44 may be connected to the air supply nipple 43 before the sheath 2 is inserted into the sheath cover 4.

Next, while the air supply pump 70 is operated to supply air into the sheath 2, as shown by arrows in FIG.
Only the distal end of the insertion tube 1 of the endoscope from the proximal end of the
When inserted inside, the space between the packing 31 and the outer surface of the insertion tube 1 is sealed, and the tubular body 21 starts to expand. At this time, the distal end portion of the tubular body 21 comes into contact with the tapered portion of the sheath cover tubular body 41, and the extension is sequentially suppressed in the long axis direction, but does not extend in the axial direction.

When the tubular body 21 expands until it hits the inner peripheral surface of the sheath cover tubular body 41, the insertion tube 1 of the endoscope is inserted toward the distal end support body 23 of the sheath 2 as shown in FIG. When the distal end of the insertion tube 1 reaches the distal end support 23 of the sheath 2, the air supply pump 70 is stopped to stop the air supply. Then, the sheath cover 4 is pulled out of the sheath 2 after the sheath 2 is completely compressed and comes into close contact with the insertion tube 1. At this time, the air supply tube 44 connected to the air supply nipple 43 is connected to the sheath cover.
It remains connected to 44 and is detached from the sheath 2 together with the sheath cover 4.

When the inspection with the endoscope is completed, the sheath cover 4 is attached to the sheath 2 again, and the sheath 2 is expanded by sending air into the sheath 2, and the insertion tube 1 of the endoscope is removed from the inside of the sheath 2. At this time, since the air supply tube 44 remains connected to the air supply nipple 43 from the time of inserting the insertion tube 1 into the sheath 2, there is no need to connect the air supply tube 44 to the air supply nipple 43 again.

In the air supply pressure adjuster 46, the air supply pressure
When the weight applied becomes larger, the ball valve 48 rises, the vent hole 47 is opened, and the air is released to the outside. Therefore, the air supply pressure is maintained at a constant pressure determined by the load. When the type of the sheath 2 to be used is changed, the additional weight 51 can be replaced with a different weight to adjust the air supply pressure to an optimum state.

The higher the air supply pressure, the more easily the cylinder 21 is ruptured.If the cylinder 21 ruptures at a high pressure, the risk of spreading a pathogen or the like increases accordingly, so the air supply pressure should inflate the cylinder 21. The minimum pressure required is sufficient.

When a diaphragm pump or the like is used as the air supply pump 70, pulsation occurs in the air supply.Therefore, the pulsation occurs between the air supply pressure adjusting tool 46 of the air supply tube 44 and the air supply pump 70. What is necessary is just to add the absorber which absorbs.

Further, in the above embodiment, the front end portion of the sheath cover tubular body 41 is sealed to prevent the dirt and the like attached to the used sheath 2 from leaking out. However, when the possibility of contamination is small, The front end of the sheath cover tubular body 41 may be open when there is another suitable pollution prevention means.

[Effects of the Invention] According to the sheath device for an endoscope of the present invention, since the air supply tube connecting means for connecting the air supply tube and the like is provided on the sheath cover, once the air supply tube is attached to the sheath cover. Since it is not necessary to remove the insertion tube of the endoscope into the sheath from the time of insertion to the end, the handling is very easy and the operability is good.

[Brief description of the drawings]

1 is a side sectional view of the embodiment, FIG. 2 is an external view of the embodiment, FIG. 3 is a side sectional view of the embodiment, and FIG. 4 is a partially enlarged sectional view of the embodiment. 1 ... insertion tube, 2 ... sheath, 4 ... sheath cover, 21
... tubular body, 24 ... mouth support, 41 ... sheath cover tubular body, 42 ... sheath cover support, 43 ... air supply nipple, 44 ... air supply tube, 46 ... air supply pressure Adjuster, 47…
... insertion hole, 48 ... ball valve, 49 ... weight, 51 ... additional weight.

Claims (1)

(57) [Claims] 1. A sheath which is swelled by supplying air to the inside thereof and which is covered so as to be removably inserted into an insertion tube of an endoscope, and is provided detachably with respect to the sheath to restrict excessive swelling of the sheath. A sheath cover surrounding the sheath with an interval between the sheath, and an air supply tube connecting means provided on the sheath cover for connecting an air supply tube for supplying air into the sheath. A sheath device for an endoscope, comprising: