WO2009119053A1 - オーバーチューブ用脱気防止弁ユニット - Google Patents
オーバーチューブ用脱気防止弁ユニット Download PDFInfo
- Publication number
- WO2009119053A1 WO2009119053A1 PCT/JP2009/001258 JP2009001258W WO2009119053A1 WO 2009119053 A1 WO2009119053 A1 WO 2009119053A1 JP 2009001258 W JP2009001258 W JP 2009001258W WO 2009119053 A1 WO2009119053 A1 WO 2009119053A1
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- WIPO (PCT)
- Prior art keywords
- overtube
- endoscope
- prevention valve
- valve unit
- locking
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
- A61B1/00128—Connectors, fasteners and adapters, e.g. on the endoscope handle mechanical, e.g. for tubes or pipes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/00135—Oversleeves mounted on the endoscope prior to insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00154—Holding or positioning arrangements using guiding arrangements for insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/015—Control of fluid supply or evacuation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3423—Access ports, e.g. toroid shape introducers for instruments or hands
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/0014—Fastening element for attaching accessories to the outside of an endoscope, e.g. clips, clamps or bands
Definitions
- the present invention relates to an overtube deaeration prevention valve unit.
- the overtube is used for safely and smoothly inserting and removing the endoscope into and from the body cavity (see, for example, Patent Document 1).
- a deaeration prevention valve is attached to the proximal end portion of the overtube so that the air supplied into the body cavity does not leak.
- a deaeration prevention valve used for an overtube is made of a member such as rubber or silicone rubber that has a followability to the operation of an endoscope, and is fixed to a part of the overtube or a grip.
- a member such as rubber or silicone rubber that has a followability to the operation of an endoscope, and is fixed to a part of the overtube or a grip.
- EMR endoscopic mucosal resection
- ESD endoscopic submucosal dissection
- a gap is easily generated between the valve element of the deaeration prevention valve attached to the proximal end portion of the overtube and the proximal end portion of the endoscope.
- the air supplied into the body cavity leaks out from the gap, the body cavity contracts, and the field of view of the endoscope deteriorates. There is a problem. Furthermore, if the air supply to the treatment site is insufficient, the treatment site may not swell and the treatment may be difficult for the operator.
- the lesion part to be removed is generally larger than the EMR.
- the endoscope insertion hole of this deaeration prevention valve has a relatively small diameter.
- the deaeration prevention valve is attached to the proximal end of the overtube, the lesion tissue is damaged or the entire volume cannot be removed when the endoscope passes through the deaeration prevention valve. There was a problem.
- the excised diseased tissue in endoscopic resection such as EMR and ESD, can be easily removed from the body cavity, and air is fed into the body cavity even if the endoscope is moved in an arbitrary direction with respect to the overtube.
- a deaeration prevention valve unit capable of preventing air leakage is provided.
- An overtube deaeration prevention valve unit that has a lumen through which an endoscope can be inserted and removed, and is detachably attached to a proximal end portion of an overtube that is inserted into a body cavity, A frame portion attached to an outer peripheral surface of the base end portion of the overtube; A locking portion provided in the frame portion and releasably locked to the outer peripheral surface of the base end portion; A valve body provided inside the frame part; Have The valve body is An annular endoscope insertion portion that is provided at a substantially central portion of the valve body portion and is attached to the endoscope; Flexible telescopic means provided around the endoscope insertion portion; The deaeration prevention valve unit for overtubes characterized by having is provided.
- the locking portions may be provided at two or more locations around the frame portion so as to be separated from each other. .
- the degassing prevention valve unit for an overtube includes a tube main body inserted into the body cavity, the base end portion formed larger in diameter than the tube main body, and the base end portion from the tube main body. Is attached to the overtube having a diameter-expanded portion whose diameter increases over time, The locking portion may be detachably locked on the outer surface side of the enlarged diameter portion by locking means protruding toward the inside of the frame portion.
- the locking portion is, A finger hooking part that is integrally formed with the locking means and that opens and closes the locking means to a closed state in which the locking means can be locked to the enlarged diameter part or an open state in which the locking means can be detached from the enlarged diameter part. May be.
- the endoscope insertion portion has a straight tube portion extending in the thickness direction of the valve body portion. May be.
- the degassing prevention valve unit for overtube of the present invention may have a substantially ring-shaped fixing member for fixing the valve body portion to the frame portion as a more specific embodiment.
- the expansion / contraction means may include a bellows portion.
- a reinforcing member is provided between the outer peripheral edge portion of the endoscope insertion portion and the inner peripheral edge portion of the telescopic means. You may have.
- the reinforcing member may be formed in an O-ring shape.
- the inner diameter of the endoscope insertion portion is in the range of 0 mm or more and 5 mm or less than the outer diameter of the endoscope. It may be small.
- the second valve body portion having the second endoscope insertion portion and the second expansion / contraction means includes the valve It may be further provided apart from the distal end side of the body part.
- the second endoscope insertion portion is a hole or a slit into which the endoscope can be loosely inserted. Also good.
- the various components of the present invention do not have to be individually independent, that a plurality of components are formed as one member, and one component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like.
- an over-tube deaeration prevention valve unit that can be easily attached to and detached from the tube can be provided.
- FIG. 5 is a sectional view taken along line BB in FIG. 4. It is a rear view of the deaeration prevention valve unit which concerns on embodiment of this invention. It is sectional drawing of the deaeration prevention valve unit which concerns on the 1st modification of this invention. It is sectional drawing of the deaeration prevention valve unit which concerns on the 2nd modification of this invention. It is sectional drawing of the deaeration prevention valve unit which concerns on the 3rd modification of this invention.
- deaeration prevention valve unit an overtube deaeration prevention valve unit (hereinafter, simply referred to as “deaeration prevention valve unit”) of the present invention will be described with reference to the drawings.
- deaeration prevention valve unit an overtube deaeration prevention valve unit of the present invention.
- the deaeration prevention valve unit 1 has a lumen 42 through which an endoscope (not shown) can be inserted and removed freely, with respect to the proximal end portion 43 of the overtube 4 inserted into the body cavity. It is attached detachably.
- a frame portion 3 attached to the outer peripheral surface 44 of the base end portion 43 of the overtube 4, a locking portion 2 provided on the frame portion 3 and detachably locked to the outer peripheral surface 44 of the base end portion 43;
- a valve body portion 5 provided inside the frame portion 3.
- the valve body portion 5 of the present embodiment is provided at an approximately central portion of the valve body portion 5 and is provided around the endoscope insertion portion 6 and an annular endoscope insertion portion 6 that is attached to the endoscope.
- Flexible extension / contraction means 8 8.
- the deaeration prevention valve unit 1 of the present embodiment includes a tube main body 45 that is inserted into a body cavity, a base end portion 43 that has a larger diameter than the tube main body 45, and a tube main body 45.
- the overtube 4 having a diameter-expanded portion 41 in which the diameter of the overtube 4 increases from the base end portion 43 to the base end portion 43.
- locking part 2 of the deaeration prevention valve unit 1 is latched to the outer peripheral surface 44 of the enlarged diameter part 41 by the latching means 21 protruded toward the inner side of the flame
- the tube body 45 of the overtube 4 is a small diameter portion that is inserted into a body cavity such as a human body, and the distal end is open.
- the proximal end portion 43 is a large-diameter portion having a predetermined length that is held outside the body cavity, and the lumen 42 opens toward the proximal end side of the overtube 4. Therefore, the diameter of the overtube 4 increases from the tube main body 45 toward the base end portion 43.
- the shape of the base end part 43 can take various forms, from the viewpoint of the insertion property of the endoscope insertion part 6, it typically has a circular funnel shape. That is, as shown in FIG.
- the proximal end portion 43 of the overtube 4 to which the deaeration prevention valve unit 1 of the present embodiment is attached is a tapered diameter-expanded portion in which the diameter of the tube main body 45 is smoothly expanded. 41 is formed.
- the base end portion 43 of the overtube 4 is a proximal end side region having a predetermined length, and the base end portion 43 includes a tapered diameter-expanding portion 41.
- the overtube 4 to which the deaeration prevention valve unit 1 is attached is not limited to the above.
- the tube main body 45 and the base end portion 43 may have the same diameter, or may have a stepped portion whose diameter increases discontinuously from the tube main body 45 to the base end portion 43.
- the frame portion 3 of the deaeration prevention valve unit 1 is a frame body that is attached to the outer peripheral surface 44 of the base end portion 43.
- the frame part 3 can take various shapes according to the shape of the base end part 43 of the overtube 4, it has comprised the substantially cylindrical shape in this embodiment.
- the frame portion 3 is integrally formed with an inward flange-shaped fixing portion 31 with a predetermined width.
- the valve body part 5 is a flexible member that is airtightly adhered to the endoscope, and is provided on the inner surface of the frame part 3. More specifically, the valve body portion 5 is made in a substantially disc shape as a separate member from the frame portion 3, and is mounted inside the cylindrical frame portion 3 and fixed to the fixing portion 31.
- An annular endoscope insertion portion 6 having a substantially circular insertion hole 62 is provided at a substantially central portion of the valve body portion 5.
- the endoscope insertion portion 6 is elastically deformable and deformable, and the endoscope is inserted into the insertion hole 62 so as to be freely inserted and removed, and the endoscope insertion portion 6 is in airtight contact with the periphery of the endoscope. .
- a telescopic means 8 is formed on the outer peripheral edge of the endoscope insertion portion 6.
- the expansion / contraction means 8 can move the endoscope insertion portion 6 in the radial direction (left-right direction in FIG. 3), the forward / backward direction (up-down direction in FIG. 3), and the rotation direction (twist direction or swing direction of the endoscope). It is a flexible member.
- the deaeration prevention valve unit 1 of the present embodiment by providing the expansion / contraction means 8, the valve body 5 is deformed following the endoscope. For this reason, when an operator moves the endoscope inserted through the lumen 42 of the overtube 4, the operability of the endoscope is not impaired.
- a closing plug portion 54 (see FIGS. 3 and 6) that fits with the opening on the proximal end side of the lumen 42 of the overtube 4 and hermetically seals the opening on the outer peripheral edge of the valve body 5. Is formed integrally with the expansion / contraction means 8.
- the deaeration prevention valve unit 1 of the present embodiment is detachably attached to the base end portion 43 of the overtube 4 by operating the locking portion 2.
- the locking part 2 is provided on the circumference of the outer edge of the frame part 3.
- the deaeration prevention valve unit 1 of the present embodiment is directed toward the inside of the frame portion 3 with respect to the diameter-expanded portion 41 that increases in diameter from the distal end side of the overtube 4 toward the proximal end side. It is mounted by engaging the protruding locking means (locking claw) 21.
- the locking means 21 of the present embodiment is formed at the tip of the locking portion 2 that protrudes in the axial direction from the cylindrical frame portion 3.
- the present invention is not limited to this, and the locking means 21 may be formed on the inner peripheral surface of the cylindrical frame portion 3, for example.
- the locking means 21 in the present invention is not limited to the locking claw that engages with the enlarged diameter portion 41 of the overtube 4.
- the locking means 21 may be a combination of a friction element such as silicone rubber having a predetermined friction coefficient and a biasing means such as a spring that biases this friction element against the outer peripheral surface 44 of the overtube 4.
- the deaeration prevention valve unit 1 is fixed to the outer peripheral surface 44 of the base end portion 43 even with respect to the overtube 4 that does not have the enlarged diameter portion 41 to which the locking claw can be engaged. be able to.
- the deaeration prevention valve unit 1 of the present embodiment is detachably attached to the outer peripheral surface 44 of the overtube 4 by using the locking portion 2 that is detachably locked to the base end portion 43 of the overtube 4. Is done. That is, the deaeration prevention valve unit 1 according to this embodiment is mounted outside the overtube 4. For this reason, even if the deaeration prevention valve unit 1 is attached to the overtube 4, the movable range of the endoscope in the lumen 42 of the overtube 4 is not narrowed, and the operability of the endoscope is not impaired. . When the deaeration prevention valve unit 1 is attached to the overtube 4, the proximal end of the lumen 42 is kept airtight by the valve body 5 that is attached to the endoscope.
- the deaeration prevention valve unit 1 can be detached from the overtube 4. For this reason, when removing the diseased tissue excised by endoscopic resection such as EMR or ESD from the body cavity, the deaeration prevention valve unit 1 is overtubed while the endoscope is inserted into the lumen 42. 4 can be removed.
- the locking portion 2 has a finger hook portion 22 formed integrally with the locking means 21.
- the finger hooking portion 22 is a portion that the operator opens and closes in a closed state in which the locking means 21 can be locked to the enlarged diameter portion 41 or an open state in which the locking means 21 can be detached from the enlarged diameter portion 41.
- the locking portion 2 has a locking means 21 in the lower portion, a finger hook portion 22 in the upper portion, and a frame at a joint portion 23 that is intermediate between the locking means 21 and the finger hook portion 22. It is joined to the part 3.
- the joint portion 23 is movably joined to the frame portion 3, and when the external force is not applied to the finger hook portion 22 (closed state), the opposing locking means 21 is the outer surface of the enlarged diameter portion 41 of the overtube 4.
- the deaeration prevention valve unit 1 is attached to the overtube 4.
- the locking means 21 can pass through the enlarged diameter portion 41 of the overtube 4, and the deaeration prevention valve unit 1 can be detached from the overtube 4.
- the number of the locking portions 2 is not particularly limited, and may be one or two or more.
- the locking portions 2 are provided at two or more locations around the frame portion 3 so as to be separated from each other.
- the locking portion 2 of the present embodiment is formed at two locations facing each other with respect to the central axis of the cylindrical frame portion 3.
- three locking portions 2 may be formed at an angular interval of 120 degrees with respect to the central axis of the frame portion 3, or four locking portions at an angular interval of 90 degrees with respect to the central axis. 2 may be formed.
- the locking portion 2 may be provided only at one place on the circumference of the frame portion 3. That is, the deaeration prevention valve unit 1 is fixed to the base end portion 43 of the overtube 4 with one locking part 2 and the frame part 3, and the deaeration prevention valve unit 1 is connected to the overtube by opening the locking part 2. 4 may be removable.
- the deaeration prevention valve unit 1 of the present embodiment can be removed from the overtube 4 with the other hand.
- the number of the locking portions 2 is preferably three or less.
- the locking part 2 is preferably provided at two locations facing each other on the circumference of the frame part 3.
- the locking portion 2 may be formed integrally with the frame portion 3 or may be formed as a separate member from the frame portion 3 and movably joined and fixed to the frame portion 3.
- these materials include resin materials such as hard vinyl chloride resin, polyurethane resin, polyethylene resin, polyamide resin, polypropylene resin, polyacetal resin, and fluorinated polyethylene resin. Is available.
- resin materials such as hard vinyl chloride resin, polyurethane resin, polyethylene resin, polyamide resin, polypropylene resin, polyacetal resin, and fluorinated polyethylene resin. Is available.
- polyethylene resin, polyamide resin, and polypropylene resin are used from the viewpoint of the durability of the hinge of the joint portion 23 that is a fixing portion between the locking portion 2 and the frame portion 3. preferable.
- the material of the locking part 2 is not particularly limited, but it is necessary to withstand the strength of applying an external force to the finger-hook part 22 and tilting the locking part 2 as a whole.
- a relatively hard material is desirable.
- the locking portion 2 for example, hard vinyl chloride resin, hard polyurethane resin, polyethylene resin, polyamide resin, polypropylene resin, polyacetal resin, fluorinated polyethylene resin, or the like can be used.
- the material of the frame part 3 is not specifically limited, However, it resists the external force given to the latching
- a relatively hard material for the frame portion 3 the inner diameter of the lumen 42 is sufficiently secured, and the operability of the endoscope is improved.
- a material of the frame part 3 for example, a hard vinyl chloride resin, a hard polyurethane resin, a polyethylene resin, a polyamide resin, a polypropylene resin, a polyacetal resin, a fluorinated polyethylene resin, or the like can be used.
- the locking portion 2 and the frame portion 3 can be fixed to each other at the joint portion 23 by a hinge connection using a fixing pin that penetrates both.
- a spring that urges the locking means 21 against the outer peripheral surface 44 of the overtube 4 may be attached to the fixing pin.
- the deaeration prevention valve unit 1 of the present embodiment has a fixing portion 31 for fixing the valve body portion 5 on the one opening end surface of the cylinder of the frame portion 3 in an inward flange shape.
- the valve body part 5 may be bonded and fixed to the fixing part 31, or the valve body part 5 may be sandwiched between the fixing part 31 and another member.
- the deaeration prevention valve unit 1 of this embodiment has a substantially ring-shaped fixing member (fixing ring 7) that fixes the valve body 5 to the frame 3.
- the fixing ring 7 has a ring shape having an outer shape accommodated in the cylindrical frame portion 3, and the fixing ring 7 and the fixing portion 31 press and sandwich the outer peripheral edge of the valve body portion 5.
- the claw 32 is a stopper that prevents the fixing ring 7 from falling off the frame portion 3.
- the material of the fixing ring 7 is not particularly limited, but the endoscope is obtained by firmly fixing the valve body portion 5 to the frame portion 3 while making the entire deaeration prevention valve unit 1 thin to improve the operability of the endoscope. It is preferable to have sufficient strength to withstand the frictional force between the valve body portion 5 and the valve body portion 5.
- a resin material such as hard vinyl chloride resin, hard polyurethane resin, polyethylene resin, polyamide resin, polypropylene resin, polyacetal resin, and fluorinated polyethylene resin can be used.
- the deaeration prevention valve unit 1 of the present embodiment includes a reinforcing member 9 between the outer peripheral edge portion of the endoscope insertion portion 6 and the inner peripheral edge portion of the expansion / contraction means 8.
- the reinforcing member 9 is a member for increasing the elastic modulus of the endoscope insertion portion 6 as compared with the expansion / contraction means 8 and improving the adhesion with the endoscope.
- the reinforcing member 9 of the present embodiment is integrally formed with a material common to the annular endoscope insertion portion 6.
- the reinforcing member 9 of the present embodiment is formed in an O-ring shape.
- the endoscope insertion portion 6 is uniformly attached around the endoscope, so that the endoscope outer surface and the endoscope insertion can be performed even if the endoscope is moved forward and backward, vertically and horizontally, and rotated. A gap is prevented from being formed between the portions 6.
- the expansion / contraction means 8 has a bellows portion that expands and contracts in the circumferential plane direction of the insertion hole 62 of the endoscope insertion portion 6.
- the bellows part By attaching the bellows part to the expansion / contraction means 8, it is possible to relieve stress applied to the endoscope insertion part 6 particularly when the endoscope is inserted and removed, and the endoscope can be smoothly inserted and removed. Further, even if the endoscope inserted into the insertion hole 62 is operated in all directions of forward / backward, up / down / left / right and rotation around the endoscope insertion portion 6, the bellows portion contracts or extends, There is no hindrance to the free movement of the endoscope.
- the bellows portion is more flexible than the endoscope insertion portion 6, the endoscope insertion portion 6 is displaced with respect to the frame portion 3 while being in close contact with the outer surface of the endoscope. Therefore, the clearance gap between the endoscope insertion part 6 and an endoscope can be minimized, and the airtightness of an endoscope and the deaeration prevention valve unit 1 can be maintained.
- FIG. 7 is a cross-sectional view of the deaeration prevention valve unit 1 according to a first modification of the present embodiment.
- the second valve body portion 51 having the second endoscope insertion portion 61 and the second expansion / contraction means 81 is replaced with a valve body portion (first valve body portion 5).
- the second valve body 51 is pressed and held against the first valve body 5 by the second fixing ring 71.
- the thickness of the first fixing ring 7 between the first valve body portion 5 and the second valve body portion 51 is made larger than in the case of the above embodiment (see FIG. 5), and the first By expanding the space between the valve body part 5 and the second valve body part 51, the movements of the valve bodies do not interfere with each other. Thereby, the first valve body part 5 and the second valve body part 51 can be freely deformed, and can follow the movement of the endoscope, and the endoscope and the endoscope insertion part. It is possible to keep the airtightness with 6 better.
- the second endoscope insertion part 61 is a hole or a slit into which the endoscope can be loosely inserted.
- the inner diameter of the endoscope insertion portion (6 or 61) in one valve body portion may be larger than the outer diameter of the endoscope.
- FIG. 8 is a cross-sectional view of the deaeration prevention valve unit 1 according to a second modification of the present embodiment.
- the expansion / contraction means 8 can make the peak part and the valley part (folded part 82) of the bellows part thinner than the other flat part (inclined part 83). By doing so, the contraction or extension of the bellows part becomes softer, and friction with the endoscope can be reduced during insertion / extraction of the endoscope and operation of the endoscope, so that the operability of the endoscope is further improved.
- an operation of rotating the shaft around the endoscope insertion portion 6 is also performed.
- the endoscope insertion portion 6 rotates together with the endoscope due to the high elastic force of the thick inclined portion 83 in the bellows portion with respect to the axial rotation movement around the endoscope insertion portion 6. And curbing around this.
- the endoscope insertion part 6 can follow suitably with respect to the motion of the front and rear, right and left of an endoscope with the low elastic force which the thin folding
- the inner diameter of the endoscope insertion portion 6 is smaller in the range of 0 mm or more and 5 mm or less than the outer diameter of the endoscope inserted therethrough. More specifically, the inner diameter of the endoscope insertion portion 6 is more preferably smaller than the outer diameter of the endoscope in the range of 2 mm or more and 4 mm or less.
- the material of the valve body 5 is preferably a stretchable material such as natural rubber, synthetic rubber, polyurethane elastomer, styrene-butadiene-styrene terpolymer, silicone rubber, etc., and improves the friction with the endoscope. Therefore, it is also preferable to use the above material containing oil.
- FIG. 9 is a cross-sectional view of the deaeration prevention valve unit 1 according to a third modification of the present embodiment.
- the endoscope insertion portion 6 has a straight pipe portion 65 extending in the thickness direction of the valve body portion 5.
- the deaeration prevention valve unit 1 of this modification is the above embodiment (see FIG. 5) in that the endoscope insertion portion 6 is in close contact with the outer peripheral surface of the endoscope over a predetermined extension length. Is different.
- the O-ring-shaped reinforcing member 9 is formed on the outer peripheral side of the straight pipe portion 65, and the inner peripheral surface of the straight pipe portion 65 has a cylindrical surface shape.
- the adhesion between the endoscope insertion portion 6 and the endoscope is improved, and the endoscope around the endoscope insertion portion 6 is replaced with the lumen 42.
- the O-ring-shaped reinforcing member 9 does not roll and rotate with respect to the endoscope. This prevents a gap from being generated between the endoscope insertion portion 6 and the endoscope when the operator operates the endoscope.
- a deaeration prevention valve unit for an overtube that is inserted into a human body lumen and has a lumen that allows the endoscope to be inserted and removed and has an enlarged diameter portion on the proximal end side, and is detachable from the overtube.
- a substantially cylindrical frame portion that is attached to and detached from the outer surface of the enlarged portion of the overtube;
- a locking part provided with at least two places on the circumference of the outer edge of the frame part and having locking means for locking to the outer surface of the enlarged diameter part of the overtube;
- a substantially disc-shaped valve body portion provided on the inner surface of the frame portion;
- the valve body portion is provided at a substantially central portion of the valve body portion, and an endoscope insertion portion that allows the endoscope to advance and retract and rotate while maintaining an airtight state, Telescopic means provided around the outer peripheral edge of the endoscope insertion portion;
- a deaeration prevention valve unit for an overtube characterized by comprising (Ii) The degassing prevention valve unit for overtube according to (i), which has a substantially ring-shaped fixing member that fixes the valve body portion to the frame portion.
- Prevention valve unit The degassing prevention valve unit for overtube according to (iv), wherein the reinforcing member includes an O-ring.
- the inner diameter of the endoscope insertion portion is smaller than the outer diameter of the endoscope used in the range of 0 mm or more and 5 mm or less, and the degassing prevention for overtube according to any one of (i) to (v) Valve unit.
- the second tube body portion having the second endoscope insertion portion and the second expansion / contraction means is mounted away from the valve body portion, and is removed from the overtube according to (i).
- Anti-air valve unit. (Viii) The degassing prevention valve unit for an overtube according to (vii), wherein the second endoscope insertion portion is formed with either a substantially circular hole or a slit at a substantially central portion of the cap member.
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Abstract
Description
内視鏡を挿入抜去自在に挿通する内腔を有し体腔内に挿入されるオーバーチューブの基端部に対して着脱自在に装着されるオーバーチューブ用脱気防止弁ユニットであって、
前記オーバーチューブの前記基端部の外周面に装着されるフレーム部と、
前記フレーム部に設けられて前記基端部の前記外周面に係脱可能に係止する係止部と、
前記フレーム部の内側に設けられた弁体部と、
を有し、
前記弁体部は、
前記弁体部の略中央部に設けられて前記内視鏡に周着する環状の内視鏡挿入部と、
前記内視鏡挿入部に周設された可撓性の伸縮手段と、
を有していることを特徴とするオーバーチューブ用脱気防止弁ユニットが提供される。
前記係止部が、前記フレーム部の内側に向かって突き出した係止手段によって前記拡径部の外面側に係脱可能に係止してもよい。
前記係止手段と一体に形成されて、前記係止手段を前記拡径部に対して係止可能な閉状態または前記拡径部から脱離可能な開状態に開閉操作する指掛け部をさらに有してもよい。
オーバーチューブ4の基端部43の外周面44に装着されるフレーム部3と、フレーム部3に設けられて基端部43の外周面44に係脱可能に係止する係止部2と、フレーム部3の内側に設けられた弁体部5と、を有している。
そして、本実施形態の弁体部5は、弁体部5の略中央部に設けられて内視鏡に周着する環状の内視鏡挿入部6と、内視鏡挿入部6に周設された可撓性の伸縮手段8と、を有している。
図1に示すように、本実施形態の脱気防止弁ユニット1は、体腔内に挿入されるチューブ本体45と、チューブ本体45よりも大径に形成された基端部43と、チューブ本体45から基端部43にかけてオーバーチューブ4の径が拡大する拡径部41と、を有するオーバーチューブ4に装着される。
そして、脱気防止弁ユニット1の係止部2は、フレーム部3の内側に向かって突き出した係止手段21によって拡径部41の外周面44に係脱可能に係止する。
基端部43は体腔外に保持される所定の長さの太径部であり、内腔42がオーバーチューブ4の近位端側に向かって開口している。
したがって、オーバーチューブ4は、チューブ本体45から基端部43に向かって拡径する。
基端部43の形状は種々を採りうるが、内視鏡挿入部6の挿通性の観点から、典型的には円形の漏斗状をなしている。
すなわち、図1に示すように、本実施形態の脱気防止弁ユニット1が装着されるオーバーチューブ4の基端部43には、チューブ本体45の径が滑らかに拡大するテーパー状の拡径部41が形成されている。
なお、本実施形態においてオーバーチューブ4の基端部43は所定の長さをもつ近位端側の領域であり、基端部43はテーパー状の拡径部41を含んでいる。
フレーム部3は、オーバーチューブ4の基端部43の形状に応じて種々の形状をとることができるが、本実施形態では略円筒状をなしている。また、フレーム部3には、内向きフランジ状の固定部31が所定幅で一体に形成されている。
弁体部5の外周縁部には、オーバーチューブ4の内腔42の近位端側の開口と嵌合して当該開口を気密に封止する閉止栓部54(図3、6を参照)が伸縮手段8と一体に形成されている。
係止部2は、フレーム部3の外縁の円周上に設けられている。
本実施形態の係止手段21は、円筒状のフレーム部3より軸方向に突出した係止部2の先端部に形成されている。
ただし、本発明はこれに限られるものではなく、係止手段21は、たとえば円筒状のフレーム部3の内周面上に形成されてもよい。
かかる係止手段21によれば、係止爪が掛合可能な拡径部41が存在しないオーバーチューブ4に対しても、その基端部43の外周面44に脱気防止弁ユニット1を固定することができる。
また、脱気防止弁ユニット1をオーバーチューブ4に装着した状態では、内視鏡に周着した弁体部5によって内腔42の近位端が気密に保持される。このため、内腔42に挿通された内視鏡を前後左右などに動かしたとしても、体腔内に送気された加圧空気がオーバーチューブ4の近位端側に漏れ出すことがない。よって、処置部位の視認性や切除術の作業性を良好とすることができる。
さらに、脱気防止弁ユニット1はオーバーチューブ4から脱離可能である。このため、EMRやESDなどの内視鏡切除術において切除した病変組織を体腔から摘出する際には、内視鏡を内腔42に挿通した状態のまま、脱気防止弁ユニット1をオーバーチューブ4から外しておくことができる。これにより、病変組織を内腔42から近位端側に取り出す際には、弁体部5の内視鏡挿入部6をくぐらせることなく、これを外部に摘出することができる。なお、病変組織を摘出する際には処置部位への送気は一般に不要であるため、脱気防止弁ユニット1をオーバーチューブ4から脱離して内腔42の近位端を開口させることに問題はない。
さらに、オーバーチューブの内腔の内部に押し込んで装着される上記特許文献2の脱気防止弁の場合、ひとたび内腔に押入装着されると、容易にはオーバーチューブから脱離することができない。したがって、切除された病変組織は弁体の孔部を通過させて取り出す必要があり、切除した病変組織を容易に体腔から摘出することはできない。
本実施形態の脱気防止弁ユニット1においては、図2に示すように、係止部2は、フレーム部3の周囲に互いに離間して二箇所以上に設けられている。
このほか、フレーム部3の中心軸に対して互いに120度の角度間隔で3つの係止部2を形成してもよく、または中心軸に対して互いに90度の角度間隔で4つの係止部2を形成してもよい。さらに、係止部2はフレーム部3の周上の一箇所のみに設けられてもよい。すなわち、一つの係止部2とフレーム部3とでオーバーチューブ4の基端部43に脱気防止弁ユニット1を固定し、当該係止部2の開放により脱気防止弁ユニット1をオーバーチューブ4から脱離可能としてもよい。
固定リング7は、円筒状のフレーム部3の内部に収容される外形を有するリング状をなし、固定リング7と固定部31とで弁体部5の外周縁を圧接して挟持する。
フレーム部3の円筒の内側には、図6に示すように爪32が突出して形成されている。爪32は、固定リング7がフレーム部3から抜け落ちることを防止するストッパーである。
補強部材9は、内視鏡挿入部6の弾性率を伸縮手段8よりも高め、内視鏡との密着性を向上するための部材である。
本実施形態の補強部材9は環状の内視鏡挿入部6と共通の材料にて一体成形されている。
図7は、本実施形態の第一変形例に係る脱気防止弁ユニット1の断面図である。同図に示すように、本変形例では、第二の内視鏡挿入部61および第二の伸縮手段81を有する第二の弁体部51が、弁体部(第一の弁体部5)の先端側に離間して更に設けられている。
第二の弁体部51は、第二の固定リング71により第一の弁体部5に対して押圧保持されている。
このように、第二の内視鏡挿入部61を設けることで、内視鏡と内視鏡挿入部6との気密性を更に向上させることができる。この場合、第一の弁体部5と第二の弁体部51との間の第一の固定リング7の厚さを上記実施形態の場合(図5を参照)よりも大きくし、第一の弁体部5と第二の弁体部51との間に空間を拡大することで、弁体同士の動きが干渉することがない。これにより、第一の弁体部5と第二の弁体部51とがそれぞれ自由に変形可能となり、より内視鏡の動きに追随させることができるとともに、内視鏡と内視鏡挿入部6との気密性をより良く保つことが可能である。
図8は、本実施形態の第二変形例に係る脱気防止弁ユニット1の断面図である。同図に示すように、伸縮手段8は、蛇腹部の山部および谷部(折り返し部82)を、他の平坦部(傾斜部83)に比べて肉薄にすることができる。このようにすることで、蛇腹部の収縮または伸展がよりソフトになり内視鏡の挿入抜去及び内視鏡操作時に内視鏡との摩擦を低減できるため内視鏡の操作性が更に向上する。
より具体的には、内視鏡挿入部6の内径は内視鏡の外径よりも、2mm以上、4mm以下の範囲で小さいことが更に好ましい。上記範囲で内視鏡挿入部6の内径を内視鏡の外径より小さくすることで、内視鏡の挿入時および抜去時の抵抗の抑制と、内視鏡に対する内視鏡挿入部6の密着性をバランスして得ることができる。これにより、内視鏡と内視鏡挿入部6との間に適度な摩擦力が得られるため、内視鏡を動かした場合の内腔42からの空気漏れを防止しつつ、内視鏡の操作時に脱気防止弁ユニット1が内視鏡と共にオーバーチューブ4から抜けてしまうことを防止できる。
図9は、本実施形態の第三変形例に係る脱気防止弁ユニット1の断面図である。
本変形例の脱気防止弁ユニット1は、内視鏡挿入部6が、弁体部5の厚み方向に延在する直管部65を有している。
本変形例の脱気防止弁ユニット1は、内視鏡の外周面に対して内視鏡挿入部6が所定の延在長さに亘って密着する点で上記実施形態(図5を参照)と相違している。
Oリング状の補強部材9は直管部65の外周側に形成され、直管部65の内周面は円筒面状をなしている。
(i)人体管腔内に挿入され、内視鏡を挿入抜去自在にする内腔を有し基端部側に拡径部を有するオーバーチューブに着脱自在なオーバーチューブ用脱気防止弁ユニットであって、
前記オーバーチューブの拡径部外面に着脱する略円筒状のフレーム部と、
前記フレーム部の外縁の円周上に少なくとも2箇所備えられ前記オーバーチューブの拡径部外面に係止する係止手段を有する係止部と、
前記フレーム部の内面に設けられた略円板形状の弁体部と、
を有し、
前記弁体部は、前記弁体部の略中央部に設けられ気密状態を維持したまま内視鏡を進退及び回転自在とする内視鏡挿入部と、
前記内視鏡挿入部の外周縁部に周設された伸縮手段と、
を有していることを特徴とするオーバーチューブ用脱気防止弁ユニット。
(ii)前記弁体部をフレーム部に固定する略リング状の固定部材を有している(i)に記載のオーバーチューブ用脱気防止弁ユニット。
(iii)前記伸縮手段は蛇腹部からなるものを含む(i)又は(ii)に記載のオーバーチューブ用脱気防止弁ユニット。
(iv)前記内視鏡挿入部の外周縁部と、伸縮手段の内周縁部との間に補強部材を有している(i)乃至(iii)のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
(v)前記補強部材はOリングを含むものである(iv)に記載のオーバーチューブ用脱気防止弁ユニット。
(vi)前記内視鏡挿入部の内径は、用いられる内視鏡の外径より0mm以上、5mm以下の範囲で小さい(i)乃至(v)のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
(vii)更に、第二の内視鏡挿入部及び第二の伸縮手段を有する第二の弁体部が、前記弁体部から離れて載設された(i)に記載のオーバーチューブ用脱気防止弁ユニット。
(viii)前記第二の内視鏡挿入部は前記キャップ部材の略中央部に略円形の穴又はスリットのいずれかが形成されている(vii)に記載のオーバーチューブ用脱気防止弁ユニット。
Claims (12)
- 内視鏡を挿入抜去自在に挿通する内腔を有し体腔内に挿入されるオーバーチューブの基端部に対して着脱自在に装着されるオーバーチューブ用脱気防止弁ユニットであって、
前記オーバーチューブの前記基端部の外周面に装着されるフレーム部と、
前記フレーム部に設けられて前記基端部の前記外周面に係脱可能に係止する係止部と、
前記フレーム部の内側に設けられた弁体部と、
を有し、
前記弁体部は、
前記弁体部の略中央部に設けられて前記内視鏡に周着する環状の内視鏡挿入部と、
前記内視鏡挿入部に周設された可撓性の伸縮手段と、
を有していることを特徴とするオーバーチューブ用脱気防止弁ユニット。 - 前記係止部が、前記フレーム部の周囲に互いに離間して二箇所以上に設けられている請求項1に記載のオーバーチューブ用脱気防止弁ユニット。
- 前記体腔内に挿入されるチューブ本体と、前記チューブ本体よりも大径に形成された前記基端部と、前記チューブ本体から前記基端部にかけて径が拡大する拡径部と、を有する前記オーバーチューブに装着される請求項1または2に記載のオーバーチューブ用脱気防止弁ユニットであって、
前記係止部が、前記フレーム部の内側に向かって突き出した係止手段によって前記拡径部の外周面に係脱可能に係止することを特徴とするオーバーチューブ用脱気防止弁ユニット。 - 前記係止部が、
前記係止手段と一体に形成されて、前記係止手段を前記拡径部に対して係止可能な閉状態または前記拡径部から脱離可能な開状態に開閉操作する指掛け部をさらに有する請求項3に記載のオーバーチューブ用脱気防止弁ユニット。 - 前記内視鏡挿入部が、前記弁体部の厚み方向に延在する直管部を有していることを特徴とする請求項1から4のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
- 前記弁体部を前記フレーム部に固定する略リング状の固定部材を有している請求項1から5のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
- 前記伸縮手段が蛇腹部を含む請求項1から6のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
- 前記内視鏡挿入部の外周縁部と、前記伸縮手段の内周縁部との間に補強部材を有している請求項1から7のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
- 前記補強部材がOリング状に形成されている請求項8に記載のオーバーチューブ用脱気防止弁ユニット。
- 前記内視鏡挿入部の内径は、前記内視鏡の外径より0mm以上、5mm以下の範囲で小さい請求項1から9のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
- 第二の内視鏡挿入部および第二の伸縮手段を有する第二の弁体部が、前記弁体部の先端側に離間して更に設けられている請求項1から10のいずれかに記載のオーバーチューブ用脱気防止弁ユニット。
- 前記第二の内視鏡挿入部は、前記内視鏡が遊挿可能な孔またはスリットである請求項11に記載のオーバーチューブ用脱気防止弁ユニット。
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Also Published As
Publication number | Publication date |
---|---|
JPWO2009119053A1 (ja) | 2011-07-21 |
CN101980654B (zh) | 2013-08-07 |
EP2255719A4 (en) | 2013-03-06 |
HK1150524A1 (en) | 2012-01-06 |
CN101980654A (zh) | 2011-02-23 |
JP5120449B2 (ja) | 2013-01-16 |
EP2255719B1 (en) | 2020-12-30 |
US20110004062A1 (en) | 2011-01-06 |
KR101118319B1 (ko) | 2012-03-09 |
US10433713B2 (en) | 2019-10-08 |
EP2255719A1 (en) | 2010-12-01 |
KR20100134633A (ko) | 2010-12-23 |
US20170215708A1 (en) | 2017-08-03 |
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