JP7323752B2 - adapter - Google Patents

Description

The present invention relates to an adapter having an anti-leak valve.

In endoscopic surgery or the like that is performed using a guide tube that guides the insertion of an endoscope that is orally inserted into a patient, the operator stops the endoscope at a desired position before performing the endoscopic surgery. I do. In addition, in order to keep the field of view of the endoscope wide and to facilitate the procedure, there are cases where air is sent into the body cavity to inflate the area around the affected area.

When performing the above method, if air escapes from the proximal end of the guide tube, the area around the affected area cannot be inflated. For this reason, an adapter having a cylindrical balloon (deflation prevention valve) that is in close contact with the outer peripheral surface of the endoscope is provided at the proximal end of the guide tube to prevent air from leaking from the proximal end of the guide tube. is known (see, for example, Patent Document 1).

In Patent Document 1, the anti-leakage valve is made of an elastically deformable material, has air sealed inside, and is deformable in the axial direction of the cylinder (in the insertion/removal direction of the endoscope). . Therefore, when the endoscope is inserted and removed (moved), the anti-leakage valve is deformed in the axial direction while being in close contact with the outer peripheral surface of the endoscope.

JP-A-5-293111

In Patent Document 1, when the endoscope is inserted and removed (moved), the anti-leakage valve is deformed accordingly. The endoscope is moved by the elastic deformation force of the anti-leakage valve. Therefore, in order to stop the endoscope at a desired position, it is necessary to stop the endoscope in consideration of the amount of movement of the endoscope after stopping, which is troublesome for the operator. In particular, it is difficult for an operator with little surgical experience to grasp the amount of movement of the endoscope after it has been stopped, and stopping the endoscope at a desired position has been a great deal of work.

SUMMARY OF THE INVENTION In view of the above points, an object of the present invention is to provide an adapter that can easily stop an endoscope at a desired position.

The adapter of the present invention includes a tubular main body attached to the base end of a guide tube through which an endoscope is inserted, and an elastically deformable tubular body, which extends in the axial direction with respect to the main body. a deaeration prevention valve attached to the inner peripheral surface of the main body along the length of the adapter, wherein the deaeration prevention valve has a small-diameter portion in which an intermediate portion in an axial direction is smaller in diameter than a distal end portion and a proximal end portion; The distal end portion and the proximal end portion are fixed to the body portion, respectively, and when the endoscope is inserted through the opening on the proximal end portion side, the inner peripheral surface of the small diameter portion is formed as the It is deformable in the axial direction according to the movement of the endoscope along the axial direction in a state of airtight contact with the outer peripheral surface of the endoscope, and is provided between the main body and the anti-leak valve. is made of a material harder than the anti-leakage valve and attached to the peripheral surface of the main body at a predetermined distance from the outer peripheral surface of the small-diameter portion, so that the anti-leakage valve is deformed in the axial direction. A deformation restricting portion is provided for restricting deformation of the deaeration prevention valve by coming into contact with an outer peripheral surface of the deaeration prevention valve when the deaeration prevention valve is in contact with the outer peripheral surface of the deaeration prevention valve. A portion that abuts against the outer peripheral surface of the deaeration prevention valve when deformed is formed in an arc shape . Note that the deformation restricting portion may be formed integrally with the main body portion, or may be provided separately from the main body portion.

According to the present invention, since deformation of the anti-leakage valve can be restricted by the deformation restricting portion, the amount of deformation of the anti-leakage valve according to insertion/removal (movement) of the endoscope can be suppressed. As a result, it is possible to suppress the movement of the endoscope due to the elastic deformation force of the anti-leakage valve after the movement of the endoscope is stopped, and the endoscope can be easily stopped at a desired position.

According to this configuration, the portion of the anti-leakage valve that contacts the deformation restricting portion can be deformed into an arc shape. In addition, the anti-leakage valve can be deformed with less load than when the portion of the deformation restricting portion that contacts the anti-leakage valve is formed in a straight line and at an acute angle.

Furthermore, it is preferable that the deaeration prevention valve has an inner peripheral surface of the small diameter portion formed in an arc shape.

According to this configuration, the area of the anti-leakage valve in close contact with the outer peripheral surface of the endoscope can be made smaller than when the inner peripheral surface of the small-diameter portion is formed in a straight line parallel to the axial direction. , it is possible to reduce the load on the deaeration prevention valve when inserting and removing the endoscope.

Explanatory drawing of the guide tube using the adapter of this invention. The perspective view which shows an adapter. The exploded perspective view which shows an adapter. FIG. 2 is an exploded sectional view showing an adapter; Sectional drawing which shows an adapter. FIG. 4 is a cross-sectional view showing the adapter with an endoscope inserted; Sectional drawing which shows the adapter of 2nd Embodiment. Sectional drawing which shows the adapter of 3rd Embodiment. Sectional drawing which shows the adapter of 4th Embodiment. Sectional drawing which shows the adapter of 5th Embodiment.

[First embodiment]
As shown in FIG. 1, the adapter 10 of the present invention is detachably attachable to the proximal end of a guide tube T that guides the insertion of an endoscope E (see FIGS. 5 and 6) that is transorally inserted into a patient. It can be attached to

The adapter 10 prevents the air sent around the affected area from the distal end of the endoscope from leaking from the proximal end of the guide tube T. The proximal end of the guide tube T is provided with a mouthpiece M that the patient holds in his/her mouth to prevent the guide tube T and the endoscope E from being bitten by the patient.

As shown in FIGS. 2 to 4, the adapter 10 includes a stepped cylindrical adapter main body 11 (main body portion), a ring 12 and a deaeration prevention valve 13 accommodated inside the adapter main body 11, and an adapter main body 11. and a cap 14 attached to the proximal end of the.

The adapter main body 11 includes a small-diameter first cylindrical portion 11a that serves as a distal end portion, and a large-diameter second cylindrical portion 11b that serves as a proximal end portion. The top surface 11c on the tip side of the second tubular portion 11b is formed linearly, and the deaeration prevention valve 13 is placed thereon. Two convex engaging portions 11d that engage with the proximal end portion of the guide tube T are formed on the outer peripheral surface of the first cylindrical portion 11a at a pitch of 180°. Eight insertion recesses 11e into which tip insertion bosses 12b, which will be described later in detail, are inserted are formed on the top surface 11c at a pitch of, for example, 45°.

The ring 12 is made of a material harder than the anti-leakage valve 13, such as hard resin (eg, ABS). 8 are formed at a pitch of °. On the base end surface (left side surface in FIG. 4) of the ring 12, eight tip insertion bosses 12b are formed at a pitch of, for example, 45°. The material for forming the ring 12 is not limited to ABS resin, and any material harder than the deaeration prevention valve 13 may be used.

An inner peripheral proximal end portion 12c and an inner peripheral distal end portion 12d (deformation restricting portion) of the ring 12 are formed in an arc shape (R shape). As will be described later in detail, the anti-leakage valve 13 is not in contact with the inner peripheral proximal end portion 12c and the inner peripheral distal end portion 12d before being deformed (see FIG. 5). Accordingly, when deformed in the axial direction, it abuts against the inner peripheral proximal end portion 12c and the inner peripheral distal end portion 12d (see FIG. 6).

The deaeration prevention valve 13 is made of a soft and elastically deformable material such as rubber, and has a cylindrical shape. The deaeration prevention valve 13 includes a proximal flange portion 13a, a distal flange portion 13b, and a connection portion 13c (small diameter portion) that connects the proximal flange portion 13a and the distal flange portion 13b. The connecting portion 13c is smaller in diameter than the proximal end flange portion 13a and the distal end flange portion 13b, and the deaeration prevention valve 13 is formed in a drum shape.

Further, the inner peripheral surface of the connecting portion 13c is formed in an arc shape (tapered shape), and the central portion in the axial direction thereof is formed to have a smaller diameter than the outer diameter of the endoscope E. As shown in FIG. A recess 13f into which the ring 12 is inserted is formed on the outer peripheral surface (valve outer peripheral surface) of the connecting portion 13c. The material constituting the anti-leakage valve 13 is not limited to rubber, and may be any soft material (for example, soft plastic).

The proximal brim portion 13a is formed with eight proximal insertion holes 13d into which the proximal insertion bosses 12a are inserted, for example, at a pitch of 45°. Eight tip insertion holes 13e into which the tip insertion bosses 12b are inserted are formed in the tip flange 13b at a pitch of 45°, for example.

The thickness of the ring 12 (thickness in the left-right direction in FIG. 4) is substantially the same as the gap space (gap length in the left-right direction in FIG. 4) between the base end flange portion 13a and the tip flange portion 13b of the deaeration prevention valve 13. is formed as When the anti-leak valve 13 is attached to the ring 12 so as to cover the ring 12 (see FIG. 5), the inner peripheral surface of the ring 12 is separated from the bottom surface of the concave portion 13f of the anti-leak valve 13 by a predetermined distance. The ring 12 is inserted into the recess 13 f of the anti-leak valve 13 .

The arcuate shape of the outer peripheral surface of the connecting portion 13c is formed along the arcuate shapes of the proximal end portion and the distal end portion (right end portion and left end portion in FIG. 4) of the inner peripheral surface of the ring 12 . As a result, when the anti-leakage valve 13 is attached to the ring 12 so as to cover the ring 12 (see FIG. 5), the arc of the outer peripheral surface of the connecting portion 13c and the proximal end and the distal end of the inner peripheral surface of the ring 12 (Right end and left end in FIG. 4) are almost the same.

The cap 14 is formed in a cylindrical shape with a bottom, and an insertion opening 14a into which an endoscope is inserted is formed in the bottom surface on the proximal side (the right end surface in FIG. 4). Eight boss insertion holes 14b into which the insertion bosses 12a are inserted are formed at a pitch of 45°, for example.

As shown in FIG. 5 , when assembling the adapter 10 , first, the anti-leak valve 13 is attached to the ring 12 so as to cover the ring 12 . In this mounting process, the tip collar portion 13b of the anti-leakage valve 13 is deformed and inserted into the opening of the ring 12. As shown in FIG. At this time, the proximal insertion boss 12a of the ring 12 is inserted into the proximal insertion hole 13d of the deaeration prevention valve 13, and the distal insertion boss 12b of the ring 12 is inserted into the deaeration prevention valve 13. is inserted into the tip insertion hole 13e. Thereby, the ring 12 and the anti-leakage valve 13 are attached in a positioned state.

Next, the deaeration prevention valve 13 is placed on the top surface 11c of the adapter body 11 and attached to the adapter body 11 . At this time, the tip insertion boss 12b that is inserted through the tip insertion hole 13e and protrudes is inserted into the insertion recess 11e of the adapter main body 11. As shown in FIG. As a result, the anti-leakage valve 13 is positioned so that its proximal end (right end in FIG. 5) opening communicates with the proximal end (right end in FIG. 5) opening of the adapter main body 11. and attached to the adapter main body 11 . A ring 12 is also attached to the adapter body 11 . In the state shown in FIG. 5 (before being deformed), the anti-leakage valve 13 is not in contact with the inner peripheral proximal end portion 12c and the inner peripheral distal end portion 12d.

Then, the cap 14 is attached to the adapter body 11 . At this time, the proximal end insertion boss 12a protruding through the proximal end insertion hole 13d is inserted into the boss insertion hole 14b of the cap . Thereby, the cap 14 is attached in a positioned state. Attachment of the cap 14 to the adapter main body 11 is performed by, for example, press-fitting, adhesion, or the like.

As shown in FIG. 6, when the endoscope E is inserted into the insertion opening 14a of the cap 14 with the adapter 10 attached to the proximal end of the guide tube T (not shown in FIG. 6), the anti-leakage valve 13 is opened. , the inner peripheral surface of the connecting portion 13c is deformed while being in close contact with the endoscope E. As shown in FIG. As a result, the air that has been sent into the body cavity in a predetermined manner is prevented from leaking from the proximal end of the guide tube T.

After inserting the endoscope E into the insertion opening 14a of the cap 14 (see FIG. 6), when the endoscope E is moved in the withdrawal direction, the anti-leakage valve 13 (connecting portion 13c) changes the shape shown in FIG. left-to-right direction) is transformed into a shape that is reversed. That is, when the endoscope E is inserted and when the endoscope E is pulled out, the same degree of force is applied to the deaeration prevention valve 13 (connecting portion 13c).

Further, in the present embodiment, the deaeration prevention valve 13 is in close contact with the endoscope E only at the inner peripheral surface (the inner peripheral surface of the connecting portion 13c). As a result, the movement of the endoscope E reverses the anti-leak valve, and the internal and outer peripheral surfaces of the anti-leak valve are in close contact with the endoscope E. The force applied to the scope E is reduced, and unintended movement of the endoscope E can be prevented.

Furthermore, in the present embodiment, when the anti-leakage valve 13 is deformed in the axial direction as the endoscope E is inserted or removed, it abuts against the inner peripheral proximal end portion 12c and the inner peripheral distal end portion 12d (deformation restricting portion). Deformation is restricted by contact. Therefore, the amount of deformation of the anti-leakage valve 13 due to the insertion of the endoscope E can be made smaller than that of the conventional valve which does not have anything to restrict the deformation. As a result, the movement of the endoscope E due to the elastic deformation force of the anti-leak valve 13 after stopping the movement of the endoscope E can be suppressed, and the endoscope E can be easily stopped at a desired position. make it easier to

In addition, in the present embodiment, since the inner peripheral proximal end portion 12c and the inner peripheral distal end portion 12d of the ring 12 are formed in an arc shape (R shape), the proximal end portion and the distal end portion of the connecting portion 13c are deformed into an arc shape. can be made In addition, the anti-leakage valve 13 can be deformed with less load than the ring 12 in which the inner peripheral proximal end portion 12c and the inner peripheral distal end portion 12d are straight and formed at an acute angle.

Furthermore, in the present embodiment, the inner peripheral surface of the connecting portion 13c of the anti-leakage valve 13 is formed in an arc shape so that the central portion in the axial direction has a smaller diameter than the base end portion and the tip end portion. Compared to a valve having a peripheral surface formed in a straight line parallel to the axial direction, the area of the anti-leakage valve 13 that is in close contact with the endoscope E can be made smaller. The load on the air preventive valve 13 can be reduced.

[Second embodiment]
As shown in FIG. 7, the ring 12 is formed with an insertion opening 12c, the adapter body 11 is formed with an insertion opening 11f communicating with the insertion opening 12c, and the cap 14 is formed with an insertion opening 14c communicating with the insertion opening 11f. You may make it In this case, since the air between the connecting portion 13c and the ring 12 can be discharged to the outside, the air is not compressed due to the deformation of the connecting portion 13c. Incidentally, the position where each insertion opening is formed can be changed as appropriate, and for example, it may be formed on the distal end side or the proximal end side of the ring 12 .

[Third embodiment]
As shown in FIG. 8, a linear portion extending parallel to the axial direction may be formed on the inner peripheral surface of the connecting portion 13c. According to the third embodiment, by forming the straight portion on the inner peripheral surface of the connecting portion 13c, the endoscope E is more stable when the endoscope E is inserted and removed than when the straight portion is not formed. The contact area between the outer peripheral surface and the inner peripheral surface of the connecting portion 13c can be increased, and the degassing prevention performance can be improved.

[Fourth embodiment]
As shown in FIG. 9, a linear portion extending parallel to the axial direction is formed on the inner peripheral surface of the connecting portion 13c, and the inner peripheral surface of the connecting portion 13c is divided between the proximal end side and the distal end side in the axial direction. Different shapes (different arc sizes) may be used. According to the fourth embodiment, by forming the straight portion on the inner peripheral surface of the connecting portion 13c, the endoscope E is more stable when the endoscope E is inserted and removed than when the straight portion is not formed. The contact area between the outer peripheral surface and the inner peripheral surface of the connecting portion 13c can be increased, and the degassing prevention performance can be improved.

[Fifth embodiment]
As shown in FIG. 10, a linear portion extending parallel to the axial direction is formed on the inner peripheral surface of the connecting portion 13c, and the inner peripheral surface of the connecting portion 13c is recessed radially outward so that the endoscope E A concave portion that does not come into contact with the outer peripheral surface may be provided to divide the inner peripheral surface of the connecting portion 13c into a plurality of areas that come into contact with the outer peripheral surface of the endoscope E. According to the fifth embodiment, by forming the straight portion on the inner peripheral surface of the connecting portion 13c, the endoscope E is more stable when the endoscope E is inserted and removed than when the straight portion is not formed. The contact area between the outer peripheral surface and the inner peripheral surface of the connecting portion 13c can be increased, and the degassing prevention performance can be improved. Note that the number of recesses can be changed as appropriate.

In the above-described embodiment, the opening of the anti-leakage valve 13 is circular, but the opening may be polygonal such as quadrangular or hexagonal, or may be laterally or vertically asymmetrical.

Further, in the above embodiment, the ring 12 contacts the outer peripheral surface of the anti-leakage valve 13 before the anti-leakage valve 13 is deformed according to insertion/removal of the endoscope E (FIG. 5, etc.). However, the ring 12 may contact the outer peripheral surface of the anti-leak valve 13 after the anti-leak valve 13 is deformed as the endoscope E is inserted or removed.

Furthermore, although the cap 14 is provided in the above embodiment, the cap 14 may not be provided. In this case, it is preferable to attach the ring 12 to the adapter body 11 .

Further, in the above embodiment, the ring 12 having the deformation restricting portion is provided. The deformation of the anti-leakage valve 13 may be restricted at 4 points with an angle of .degree. Further, the shape of the deformation restricting portion is not limited to an arc shape, but can be changed as appropriate, and may be a linear shape, a wavy line shape, or a chamfered shape such as an angular surface or a circular surface.

DESCRIPTION OF SYMBOLS 10... Adapter, 11... Adapter main body (main-body part), 12... Ring, 12c... Inner-periphery proximal part (deformation control part), 12d... Inner-periphery front-end|tip part (deformation control part), 13... Deaeration prevention valve, 13c... Connection Part (small diameter portion) 13f Recess 14 Cap 14a Insertion opening E Endoscope T Guide tube

Claims (2)

a cylindrical main body attached to the proximal end of the guide tube through which the endoscope is inserted;
An adapter comprising an elastically deformable cylindrical body, and a deaeration prevention valve attached to the inner peripheral surface of the main body along the axial direction of the main body,
The anti-leakage valve has an axially intermediate portion formed as a small-diameter portion having a smaller diameter than a distal end portion and a proximal end portion. When the endoscope is inserted through the opening on the proximal end side, the endoscope moves along the axial direction while the inner peripheral surface of the small diameter portion is in airtight contact with the outer peripheral surface of the endoscope. is deformable in the axial direction according to
Between the main body portion and the anti-leakage valve, a material harder than the anti-leakage valve is attached to the peripheral surface of the main body portion at a predetermined distance from the outer peripheral surface of the small-diameter portion. a deformation restricting portion that abuts against an outer peripheral surface of the anti-leak valve to restrict deformation of the anti-leak valve when the anti-leak valve is deformed in the axial direction ;
The adapter according to claim 1, wherein the deformation restricting portion has an arcuate portion that abuts against an outer peripheral surface of the anti-leakage valve when the anti-leakage valve is deformed in the axial direction. The adapter of claim 1, wherein
The adapter according to claim 1, wherein the deaeration prevention valve has an inner peripheral surface of the small diameter portion formed in an arc shape.