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US20110004062A1 - Anti-leak valve unit for overtube - Google Patents

Anti-leak valve unit for overtube Download PDF

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Publication number
US20110004062A1
US20110004062A1 US12/919,138 US91913809A US2011004062A1 US 20110004062 A1 US20110004062 A1 US 20110004062A1 US 91913809 A US91913809 A US 91913809A US 2011004062 A1 US2011004062 A1 US 2011004062A1
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US
United States
Prior art keywords
overtube
endoscope
valve unit
leak valve
insertion port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/919,138
Other languages
English (en)
Inventor
Hideaki Asai
Shinetsu Harata
Yoshiki Toyota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Assigned to SUMITOMO BAKELITE CO., LTD. reassignment SUMITOMO BAKELITE CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASAI, HIDEAKI, HARATA, SHINETSU, TOYOTA, YOSHIKI
Publication of US20110004062A1 publication Critical patent/US20110004062A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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 anti-leak valve unit for overtube.
  • the overtube is employed for safely and smoothly inserting and removing an endoscope into and from a body cavity (for example, refer to a patent document 1).
  • an anti-leak valve is attached to a base end portion of the overtube, in order to prevent leakage of air supplied into the body cavity.
  • the anti-leak valve used with the overtube is made of a rubber or silicone rubber that can follow up the movement of the endoscope, and fixed to a portion of the overtube or to a grip (for example, refer to a patent document 2).
  • EMR Endoscopic Mucosal Resection
  • a snare is employed for dividing the diseased tissue in the case where the diseased part is large, and since the diseased tissue that has been resected is relatively small, the structure and shape of the endoscope insertion port of the conventional anti-leak valve allows taking out the diseased tissue without damage.
  • ESD Endoscopic Submucosal Dissection
  • the ESD is generally executed with the endoscope inserted through the inner cavity of the overtube inserted into the body cavity. Then a high-frequency treatment device is made to stick out from the distal end through the forceps channel of the endoscope, and manipulated while moving the endoscope back and forth, up and down, or rotationally with respect to the overtube. Accordingly, a gap is prone to be formed between the valve element of the anti-leak valve attached to the base end portion of the overtube and a proximal end portion of the endoscope.
  • the formation of the gap between the valve element of the anti-leak valve and the endoscope incurs the problem that the air supplied into the body cavity leaks through the gap and the body cavity is thereby deflated, which degrades the visual field of the endoscope. Also, in the case where the air supply to the part to be treated is insufficient, the part cannot be sufficiently inflated, which may make it difficult for the operator to execute the procedure.
  • the diseased part is often collectively resected, and hence the diseased part to be extracted is generally larger than in the case of EMR.
  • the endoscope insertion port of the anti-leak valve is relatively small, the extraction of the diseased part with the anti-leak valve attached to the overtube is technically difficult, especially in the case of ESD. More particularly, because of the presence of the anti-leak valve attached to the base end portion of the overtube, the diseased tissue is damaged when the endoscope passes through the anti-leak valve, or the extraction of the entirety of the diseased tissue is disabled.
  • the present invention provides an anti-leak valve unit that allows easily extracting a resected diseased tissue from a body cavity in an endoscopic resection such as EMR and ESD, and that prevents leakage of air supplied into the body cavity, despite moving the endoscope in any direction with respect to the overtube.
  • an anti-leak valve unit for overtube, to be removably attached to a base end portion of an overtube to be inserted into a body cavity, the overtube including an inner cavity through which an endoscope can be removably inserted, comprising:
  • a frame portion to be attached to an outer circumferential surface of the base end portion of the overtube
  • a fitting device provided on the frame portion so as to be removably engaged with the outer circumferential surface of the base end portion;
  • valve element includes:
  • annular endoscope insertion port located at a generally central portion of the valve element so as to be circumferentially fitted to the endoscope
  • the fitting device may be located at two or more positions with a spacing from each other around the frame portion.
  • the anti-leak valve unit for overtube according to the present invention may be attached to the overtube including a tube body to be inserted into the body cavity, the base end portion larger in diameter than the tube body, and a expanding portion formed in an increasing diameter from the tube body toward the base end portion; and
  • the fitting device may include a lock portion projecting inwardly of the frame portion, so as to be removably engaged with an outer surface of the expanding portion.
  • the fitting device may further include a finger-engaging portion integrally formed with the lock portion, for switching the lock portion between a closed state that enables engagement with the expanding portion and an open state that enables removal from the expanding portion.
  • the endoscope insertion port may include a straight tube portion extending thicknesswise of the valve element.
  • the anti-leak valve unit for overtube according to the present invention may comprise a generally ring-shaped fixing member that fixes the valve element to the frame portion.
  • the elastic portion may include a bellows portion.
  • the anti-leak valve unit for overtube may comprise a reinforcing member provided between an outer periphery of the endoscope insertion port and an inner periphery of the elastic portion.
  • the reinforcing member may be of an O-ring shape.
  • an inner diameter of the endoscope insertion port may be smaller than an outer diameter of the endoscope, by equal to or more than 0 mm and equal to or less than 5 mm.
  • the anti-leak valve unit for overtube according to the present invention may further comprise a second valve element including a second endoscope insertion port and a second elastic portion, located on a distal end side of the valve element, with a spacing therefrom.
  • the second endoscope insertion port may be a hole or a slit through which the endoscope can be loosely inserted.
  • constituents of the present invention do not have to be individually independent, but may be configured such that a plurality of constituents constitutes a single member, a constituent is composed of a plurality of members, a constituent is a part of another constituent, a part of a constituent and a part of another constituent overlap, and so forth.
  • the present invention provides an anti-leak valve unit for overtube that allows extracting a diseased tissue without damaging the same in endoscopic mucosal resection, and preventing leakage of supplied air despite a back and forth or rotational movement of the endoscope, and that can be easily attached and removed to and from the overtube.
  • FIG. 1 is a front view of an anti-leak valve unit according to an embodiment of the present invention, attached to an overtube for endoscope;
  • FIG. 2 is a perspective view of the anti-leak valve unit according to the embodiment of the present invention, attached to the overtube for endoscope;
  • FIG. 3 is a front view of the anti-leak valve unit according to the embodiment of the present invention.
  • FIG. 4 is a plan view of the anti-leak valve unit according to the embodiment of the present invention.
  • FIG. 5 is a cross-sectional view taken along a line B-B in FIG. 4 ;
  • FIG. 6 is a rear view of the anti-leak valve unit according to the embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of an anti-leak valve unit according to a first modification of the present invention.
  • FIG. 8 is a cross-sectional view of an anti-leak valve unit according to a second modification of the present invention.
  • FIG. 9 is a cross-sectional view of an anti-leak valve unit according to a third modification of the present invention.
  • common constituents are given the same numeral, and detailed description thereof will not be repeated in the subsequent description.
  • the anti-leak valve unit 1 is removably attached to a base end portion 43 of an overtube 4 that includes an inner cavity 42 through which an endoscope (not shown) is to be removably inserted, and that is to be inserted into a body cavity.
  • the anti-leak valve unit 1 includes a frame portion 3 attached to an outer circumferential surface 44 of the base end portion 43 of the overtube 4 , a fitting device 2 provided on the frame portion 3 so as to be removably engaged with the outer circumferential surface 44 of the base end portion 43 , and a valve element 5 provided inside the frame portion 3 .
  • the valve element 5 includes an annular endoscope insertion port 6 located at a generally central portion of the valve element 5 so as to be circumferentially fitted to the endoscope, and a flexible elastic portion 8 provided around the endoscope insertion port 6 .
  • anti-leak valve unit 1 According to this embodiment, the anti-leak valve unit 1 according to this embodiment will be described in further details.
  • the anti-leak valve unit 1 is attached to the overtube 4 which includes a tube body 45 to be inserted into the body cavity, the base end portion 43 larger in diameter than the tube body 45 , and a expanding portion 41 formed in an increasing diameter from the tube body 45 toward the base end portion 43 .
  • the fitting device 2 of the anti-leak valve unit 1 includes a lock portion 21 projecting inwardly of the frame portion 3 , so as to be removably engaged with the outer circumferential surface 44 of the expanding portion 41 .
  • the tube body 45 of the overtube 4 is a finer-diameter portion with an open distal end, to be inserted into a cavity of a human body or the like.
  • the base end portion 43 is a larger-diameter portion having a predetermined length to be retained outside the body cavity, and the inner cavity 42 is open toward the proximal end of the overtube 4 .
  • the diameter of the overtube 4 gradually increases from the tube body 45 toward the base end portion 43 .
  • the base end portion 43 may be formed in various shapes, among which typically a circular funnel-like shape is adopted, from the viewpoint of ease of insertion through the endoscope insertion port 6 .
  • the base end portion 43 of the overtube 4 to which the anti-leak valve unit 1 according to this embodiment is attached includes the expanding portion 41 of a tapered shape, where the diameter of the tube body 45 is smoothly increasing.
  • the base end portion 43 is a region having a predetermined length on the side of the proximal end of the overtube 4 , and includes the expanding portion 41 of the tapered shape.
  • the overtube 4 to which the anti-leak valve unit 1 is attached is not limited to the foregoing.
  • the tube body 45 and the base end portion 43 may have the same diameter, and the overtube 4 may include a stepped portion where the diameter discontinuously increases from the tube body 45 toward the base end portion 43 .
  • the frame portion 3 of the anti-leak valve unit 1 is a frame body attached to the outer circumferential surface 44 of the base end portion 43 .
  • the frame portion 3 may be formed in various shapes according to the shape of the base end portion 43 of the overtube 4 , among which a generally cylindrical shape is adopted in this embodiment. Also, the frame portion 3 includes a fixing portion 31 integrally formed therewith, in an inwardly projecting flange shape of a predetermined width.
  • the valve element 5 is a flexible member to be brought into air-tight close contact with the endoscope, located on the inner surface of the frame portion 3 . More specifically, the valve element 5 is a generally disk-shaped member independently formed from the frame portion 3 , and attached inside the cylindrical frame portion 3 so as to be fixed by the fixing portion 31 .
  • the valve element 5 includes, at a generally central portion thereof, the annular endoscope insertion port 6 having a generally circular insertion hole 62 .
  • the endoscope insertion port 6 is elastically stretchable and deformable, so that the endoscope can be removably inserted through the insertion hole 62 , and the endoscope insertion port 6 is air-tightly fitted around the endoscope.
  • an elastic portion 8 is provided.
  • the elastic portion 8 is a soft material that allows the endoscope insertion port 6 to move radially (left and right in FIG. 3 ), back and forth (up and down in FIG. 3 ), and rotationally (twisting or pivoting direction of the endoscope).
  • the elastic portion 8 allows the valve element 5 to be deformed following up the movement of the endoscope. Accordingly, the manipulability of the endoscope is not degraded when the operator moves the endoscope inserted through the inner cavity 42 of the overtube 4 .
  • a seal portion 54 (ref. FIGS. 3 and 6 ) integrally formed with the elastic portion 8 is provided, so as to fit with the proximal end opening of the inner cavity 42 of the overtube 4 , to thereby air-tightly seal the opening.
  • the anti-leak valve unit 1 can be removably attached to the base end portion 43 of the overtube 4 by means of the fitting device 2 .
  • the fitting device 2 is located on the circumference of the outer peripheral edge of the frame portion 3 .
  • the anti-leak valve unit 1 can be attached to the overtube 4 by engaging the lock portion (lock nail) 21 projecting inwardly of the frame portion 3 , with the expanding portion 41 which expands in a tapered shape from the distal end side toward the proximal end side of the overtube 4 .
  • the lock portion 21 is formed at a tip portion of the fitting device 2 axially projecting from the cylindrical frame portion 3 .
  • the present invention is not limited to the foregoing configuration, but the lock portion 21 may be formed, for example, on an inner circumferential surface of the cylindrical frame portion 3 .
  • the lock portion 21 is not limited to the lock nail to be engaged with the expanding portion 41 of the overtube 4 .
  • the lock portion 21 may be constituted of a combination of a frictional element such as a silicone rubber having a predetermined friction coefficient and a biasing element such as a spring that biases the frictional element toward the outer circumferential surface 44 of the overtube 4 .
  • the lock portion 21 thus configured allows fixing the anti-leak valve unit 1 to the outer circumferential surface 44 of the base end portion 43 , even in the case where the overtube 4 is not provided with the expanding portion 41 with which the lock nail can be engaged.
  • the anti-leak valve unit 1 according to this embodiment can be removably attached to the outer circumferential surface 44 of the overtube 4 by means of the fitting device 2 which can be removably engaged with the base end portion 43 of the overtube 4 .
  • the anti-leak valve unit 1 according to this embodiment is attached to the outer part of the overtube 4 .
  • Such structure prevents reduction of the motion range of the endoscope inside the inner cavity 42 of the overtube 4 when the anti-leak valve unit 1 is attached to the overtube 4 , thereby securing full manipulability of the endoscope.
  • the valve element 5 fitted around the endoscope keeps the proximal end of the inner cavity 42 air-tightly sealed. Accordingly, pressurized air supplied into the body cavity is inhibited from leaking through the proximal end of the overtube 4 , even when the endoscope inserted through the inner cavity 42 is moved back and forth or left and right. Consequently, clear visibility of the diseased part and high operation efficiency of the resection can be secured.
  • the anti-leak valve unit 1 can be removed from the overtube 4 . Accordingly, when the diseased tissue endoscopically resected by EMR or ESD is to be extracted from the body cavity, the anti-leak valve unit 1 can be removed from the overtube 4 with the endoscope remaining inserted through the inner cavity 42 . Thus, when taking out the diseased tissue from the inner cavity 42 to the proximal end side, there is no need to pass the diseased tissue through the endoscope insertion port 6 of the valve element 5 .
  • removing the anti-leak valve unit 1 from the overtube 4 thereby opening the proximal end of the inner cavity 42 causes no problem.
  • the anti-leak valve according to the patent document 2 is pressed into inside of the inner cavity of the overtube, and hence requires forming a special annular groove on the base end portion of the overtube, which degrades versatility.
  • the motion range of the endoscope is reduced to an extent corresponding to the thickness of the tip portion of the anti-leak valve attached to the overtube.
  • the anti-leak valve according to the patent document 2 which is pressed into the inner cavity of the overtube is press-inserted to the inner cavity, the anti-leak valve cannot be easily removed from the overtube. Accordingly, the resected diseased tissue has to be passed through the hole of the valve element, which makes it difficult to extract the resected diseased tissue from the body cavity.
  • the fitting device 2 includes the finger-engaging portion 22 integrally formed with the lock portion 21 .
  • the finger-engaging portion 22 serves for switching the lock portion 21 between a closed state that enables engagement with the expanding portion 41 and an open state that enables removal therefrom.
  • the fitting device 2 includes the lock portion 21 at a lower portion thereof and the finger-engaging portion 22 at an upper portion thereof, and is joined to the frame portion 3 at a joint portion 23 located between the lock portion 21 and the finger-engaging portion 22 .
  • the joint portion 23 is movably joined to the frame portion 3 , and when an external force is not applied to the finger-engaging portion 22 (closed state) the lock portions 21 opposing each other are fitted to the outer surface of the expanding portion 41 of the overtube 4 , so that the anti-leak valve unit 1 is fixed to the overtube 4 .
  • the number of the fitting devices 2 is not specifically limited, but the fitting devices 2 may be provided at one position, or two or more positions.
  • the fitting device 2 is located at two positions with a spacing from each other around the frame portion 3 , as shown in FIG. 2 .
  • the fitting device 2 is located at two positions opposing each other across the central axis of the cylindrical frame portion 3 .
  • three fitting devices 2 may be provided at angular intervals of 120 degrees from each other with respect to the central axis of the frame portion 3 , or four fitting devices 2 may be provided at angular intervals of 90 degrees from each other with respect to the central axis.
  • the fitting device 2 may be provided at just one position on the circumference of the frame portion 3 .
  • one piece of fitting device 2 and the frame portion 3 may collaborate to fix the anti-leak valve unit 1 to the base end portion 43 of the overtube 4 , such that the anti-leak valve unit 1 can be removed from the overtube 4 by releasing the fitting device 2 .
  • the anti-leak valve unit 1 allows the operator to use the other hand to remove the anti-leak valve unit 1 from the overtube 4 , and from the viewpoint of ease of the removing action by one hand, it is preferable that the number of fitting device 2 is not greater than three. Further, it is preferable to provide two fitting devices 2 at opposing positions on the circumference of the frame portion 3 , since such arrangement allows the operator to open the fitting devices 2 simply by holding the same between the fingers.
  • the fitting device 2 may be formed integrally with the frame portion 3 , or separately from the frame portion 3 and movably joined and fixed to the frame portion 3 .
  • a resin material may be employed, for example a rigid vinyl chloride resin, a polyurethane resin, a polyethylene resin, a polyamide resin, a polypropylene resin, a polyacetal resin, or a fluorinated polyethylene resin.
  • a resin material for example a rigid vinyl chloride resin, a polyurethane resin, a polyethylene resin, a polyamide resin, a polypropylene resin, a polyacetal resin, or a fluorinated polyethylene resin.
  • the material of the fitting device 2 is not specifically limited, however it is employ a relatively rigid material since the fitting device 2 has to have sufficient strength to withstand the external force applied to the finger-engaging portion 22 for tilting the entirety of the fitting device 2 .
  • Examples of such material for the fitting device 2 include a rigid vinyl chloride resin, a rigid polyurethane resin, a polyethylene resin, a polyamide resin, a polypropylene resin, a polyacetal resin, and a fluorinated polyethylene resin.
  • the material of the frame portion 3 is not specifically limited, however it is preferable that the material has sufficient strength to withstand the external force applied to the fitting device 2 without being deformed, to thereby effectively fix the valve element 5 . Also, employing a relatively rigid material for the frame portion 3 allows securing a sufficient inner diameter of the inner cavity 42 thereby improving the manipulability of the endoscope.
  • the material of the frame portion 3 include a rigid vinyl chloride resin, a rigid polyurethane resin, a polyethylene resin, a polyamide resin, a polypropylene resin, a polyacetal resin, and a fluorinated polyethylene resin.
  • the fitting device 2 and the frame portion 3 may be joined at the joint portion 23 by means of a hinge joint using a fixing pin provided so as to penetrate through the both parts.
  • a spring may be attached to the fixing pin that biases the lock portion 21 toward the outer circumferential surface 44 of the overtube 4 .
  • the anti-leak valve unit 1 includes the fixing portion 31 that fixes the valve element 5 , formed an inwardly projecting flange shape along an end face of one of the openings of the cylindrical frame portion 3 .
  • the valve element 5 may be bonded to the fixing portion 31 , or retained between the fixing portion 31 and another member.
  • the anti-leak valve unit 1 includes a generally ring-shaped fixing member (fixing ring 7 ) that fixes the valve element 5 to the frame portion 3 .
  • the fixing ring 7 has an outer diameter that enables accommodating the same inside the cylindrical frame portion 3 , so that the fixing ring 7 and the fixing portion 31 are pressed against the outer periphery of the valve element 5 so as to hold the same therebetween.
  • a nail 32 is provided inside the cylinder constituting the frame portion 3 so as to project therefrom, as shown in FIG. 6 .
  • the nail 32 serves as a stopper that prevents the fixing ring 7 from coming off from the frame portion 3 .
  • the material of the fixing ring 7 is not specifically limited, although it is preferable that the material has sufficient strength to firmly fix the valve element 5 to the frame portion 3 and to withstand the friction between the endoscope and the valve element 5 , within a limited thickness that suppresses the overall thickness of the anti-leak valve unit 1 so as to improve the manipulability of the endoscope.
  • Specific examples of the material of the fixing ring 7 include a rigid vinyl chloride resin, a rigid polyurethane resin, a polyethylene resin, a polyamide resin, a polypropylene resin, a polyacetal resin, and a fluorinated polyethylene resin.
  • the anti-leak valve unit 1 includes a reinforcing member 9 between the outer periphery of the endoscope insertion port 6 and the inner periphery of the elastic portion 8 .
  • the reinforcing member 9 serves to provide higher elastic modulus to the endoscope insertion port 6 than that of the elastic portion 8 , to thereby enhance the tightness of the contact with the endoscope.
  • the reinforcing member 9 is integrally formed with the annular endoscope insertion port 6 from the common material.
  • the reinforcing member 9 is formed in an O-ring shape. Such configuration causes the endoscope insertion port 6 to be uniformly fitted around the endoscope, to thereby prevent formation of a gap between the outer surface of the endoscope and the endoscope insertion port 6 , when the endoscope is moved back and forth, up and down or rotationally.
  • the elastic portion 8 includes a bellows portion that increases and reduces the diameter along a plane that includes the circumference of the insertion hole 62 of the endoscope insertion port 6 .
  • Providing the bellows portion in the elastic portion 8 allows alleviating stress applied to the endoscope insertion port 6 especially when the endoscope is inserted and removed, thus enabling smooth insertion and removal thereof.
  • the contracting and stretching motion of the bellows portion keeps free movement of the endoscope from being disturbed, when the endoscope inserted through the insertion hole 62 is moved in any direction including back and forth, up and down and rotationally with respect to the endoscope insertion port 6 .
  • the endoscope insertion port 6 is displaced with respect to the frame portion 3 maintaining the close contact with the outer surface of the endoscope. Such configuration allows minimizing the gap between the endoscope insertion port 6 and the endoscope, thereby maintaining the air-tightness between the endoscope and the anti-leak valve unit 1 .
  • FIG. 7 is a cross-sectional view of the anti-leak valve unit 1 according to a first modification of this embodiment.
  • the anti-leak valve unit according to this modification includes a second valve element 51 having a second endoscope insertion port 61 and a second elastic portion 81 , and located on the distal end side of the valve element (first valve element 5 ), with a spacing therefrom.
  • the second valve element 51 is pressed against the first valve element 5 by a second fixing ring 71 , so as to be retained therebetween.
  • the second endoscope insertion port 61 allows further assuring the air-tightness between the endoscope and the endoscope insertion port 6 .
  • increasing the thickness of the first fixing ring 7 between the first valve element 5 and the second valve element 51 from the foregoing embodiment (ref. FIG. 5 ) thereby defining a larger space between the first valve element 5 and the second valve element 51 prevents interference between these valve elements.
  • Such configuration permits free deformation of both the first valve element 5 and the second valve element 51 , thereby allowing the both valve elements to more faithfully following up the movement of the endoscope and more effectively maintaining the air-tightness between the endoscope and the endoscope insertion port 6 .
  • the second endoscope insertion port 61 is a hole or a slit through which the endoscope can be loosely inserted.
  • FIG. 8 is a cross-sectional view of the anti-leak valve unit 1 according to a second modification of the foregoing embodiment.
  • a hill portion and a valley portion (folded portion 82 ) of the bellows portion may be made thinner than the remaining straight portion (slope portion 83 ).
  • Such configuration permits the bellows portion to contract and stretch more flexibly thereby reducing friction with the endoscope when inserting, removing and manipulating the same, which further upgrades the manipulability of the endoscope.
  • the endoscope is manipulated so as to axially rotate in the endoscope insertion port 6 , in addition to movements in the back and forth, up and down, and left and right directions with respect to the endoscope insertion port 6 .
  • the high elasticity of the thicker slope portion 83 of the bellows portion prevents the endoscope insertion port 6 from rotating together with the endoscope and sticking around the same.
  • the lower elasticity of the thinner folded portion 82 of the bellows portion allows the endoscope insertion port 6 to more effectively follow up the back and forth and left and right movement of the endoscope.
  • the inner diameter of the endoscope insertion port 6 is smaller than the outer diameter of the endoscope to be inserted therethrough, by equal to or more than 0 mm and equal to or less than 5 mm.
  • the inner diameter of the endoscope insertion port 6 is smaller than the outer diameter of the endoscope, by equal to or more than 2 mm and equal to or less than 4 mm. Making the inner diameter of the endoscope insertion port 6 smaller than the outer diameter of the endoscope in the foregoing range leads to achieving an optimal balance between suppression of resistance against inserting and removing the endoscope and tightness of the contact of endoscope insertion port 6 with the endoscope.
  • Such configuration provides appropriate friction between the endoscope insertion port 6 and endoscope, thereby preventing the anti-leak valve unit 1 from coming off from the overtube 4 together with the endoscope during the manipulation of the same, while preventing leakage of air from the inner cavity 42 caused by the movement of the endoscope.
  • the material for the valve element 5 include elastic materials such as natural rubber, synthetic rubber, polyurethane elastomer, styrene-butadiene-styrene terpolymer, and silicone rubber, and it is also preferable that these materials contain oil for optimizing friction with the endoscope.
  • FIG. 9 is a cross-sectional view of the anti-leak valve unit 1 according to a third modification of the foregoing embodiment.
  • the endoscope insertion port 6 includes a straight tube portion 65 extending thicknesswise of the valve element 5 .
  • the anti-leak valve unit 1 according to this modification is different from that of the foregoing embodiment (ref. FIG. 5 ) in that the endoscope insertion port 6 is closely fitted to the outer circumferential surface of the endoscope over a predetermined extended length.
  • the reinforcing member 9 of the O-ring shape is formed along the outer periphery of the straight tube portion 65 , and the inner circumferential surface of the straight tube portion 65 is of a cylindrical shape.
  • the anti-leak valve unit 1 enhances the tightness of the contact between the endoscope insertion port 6 and the endoscope, thereby preventing the O-ring shaped reinforcing member 9 from rolling with respect to the endoscope, when the operator moves the endoscope, to which the endoscope insertion port 6 is circumferentially fitted, back and forth with respect to the inner cavity 42 .
  • Such configuration prevents appearance of a gap between the endoscope insertion port 6 and the endoscope, when the operator manipulates the endoscope.
  • a frame portion of a generally cylindrical shape to be removably attached to an outer circumferential surface of the expanding portion of the overtube
  • a fitting device provided at least at two positions on a circumference of an outer periphery of the frame portion, so as to be removably engaged with the outer circumferential surface of the expanding portion;
  • valve element includes an endoscope insertion port located at a generally central portion of the valve element so as to allow the endoscope to move back and forth and rotationally, while maintaining an air-tight state;
  • the anti-leak valve unit for overtube according to any of (i) to (iii) above, comprising a reinforcing member located between an outer periphery of the endoscope insertion port and an inner periphery of the elastic portion.

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  • Mechanical Engineering (AREA)
  • Endoscopes (AREA)
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US12/919,138 2008-03-24 2009-03-23 Anti-leak valve unit for overtube Abandoned US20110004062A1 (en)

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JP2008075345 2008-03-24
JP2008-075345 2008-03-24
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US15/490,602 Active US10433713B2 (en) 2008-03-24 2017-04-18 Anti-leak valve unit for overtube

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EP (1) EP2255719B1 (fr)
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140067541A1 (en) * 2012-08-31 2014-03-06 Samsung Electronics Co. Ltd. Method and device for displaying information
US10966721B2 (en) 2017-08-14 2021-04-06 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US10987108B2 (en) 2013-12-17 2021-04-27 Standard Bariatrics, Inc. Resection line guide for a medical procedure and method of using same
US11096686B2 (en) 2014-03-29 2021-08-24 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11173060B2 (en) 2019-11-04 2021-11-16 Standard Bariatrics, Inc. Systems and methods of performing surgery using Laplace's law tension retraction during surgery
US11324620B2 (en) 2015-09-16 2022-05-10 Standard Bariatrics, Inc. Systems and methods for measuring volume of potential sleeve in a sleeve gastrectomy
US11452574B1 (en) 2021-03-23 2022-09-27 Standard Bariatrics, Inc. Systems and methods for preventing tissue migration in surgical staplers
US11510672B2 (en) 2014-03-29 2022-11-29 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US20230087086A1 (en) * 2021-09-21 2023-03-23 Karl Storz Se & Co. Kg Outer Shaft for an Endoscope and Endoscope System
US12064142B2 (en) 2020-06-30 2024-08-20 Standard Bariatrics, Inc. Systems, devices, and methods for preventing or reducing loss of insufflation during a laparoscopic surgical procedure
US12232769B2 (en) 2014-03-17 2025-02-25 Intuitive Surgical Operations, Inc. Cannula seal assembly
US12274635B2 (en) 2019-11-04 2025-04-15 Standard Bariatrics, Inc. Systems and methods of performing surgery using laplace's law tension retraction during surgery

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN111938831A (zh) * 2019-05-17 2020-11-17 南微医学科技股份有限公司 一种内窥镜钳道密封件
WO2023046195A1 (fr) * 2021-09-27 2023-03-30 思未来医疗科技有限公司 Valve de biopsie pour endoscope
CN114533215B (zh) * 2022-02-08 2024-04-09 浙江天松医疗器械股份有限公司 一种多通道单孔穿刺器

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5591137A (en) * 1995-07-14 1997-01-07 Merit Medical Systems, Inc. Hemostasis valve with locking seal
US5800451A (en) * 1994-01-18 1998-09-01 Willy Rusch Ag Trocar system
US6117068A (en) * 1995-10-19 2000-09-12 Elite Genetics, Inc Artificial insemination system
US6276661B1 (en) * 1996-11-06 2001-08-21 Medtronic, Inc. Pressure actuated introducer valve
US20020010425A1 (en) * 2000-01-25 2002-01-24 Daig Corporation Hemostasis valve
US6702787B2 (en) * 1997-05-02 2004-03-09 Tyco Healthcare Group Lp Trocar seal system
JP2006262968A (ja) * 2005-03-22 2006-10-05 Sumitomo Bakelite Co Ltd 逆流防止弁
CN1907513A (zh) * 2006-07-31 2007-02-07 周泰立 用于穿刺器的单向阀
US20070073270A1 (en) * 2005-09-26 2007-03-29 C. R. Bard, Inc. Catheter connection systems
US20070254000A1 (en) * 2006-04-28 2007-11-01 Xiaoping Guo Biocompatible self-lubricating polymer compositions and their use in medical and surgical devices
JP2008295689A (ja) * 2007-05-31 2008-12-11 Sumitomo Bakelite Co Ltd オーバーチューブ用脱気防止弁ユニット
US20090105536A1 (en) * 2006-05-30 2009-04-23 Olympus Medical Systems Corp. Endoscope treatment system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2560353Y2 (ja) * 1988-10-19 1998-01-21 オリンパス光学工業株式会社 子内視鏡
US5411483A (en) * 1993-02-10 1995-05-02 Origin Medsystems, Inc. Gas-tight seal accommodating surgical instruments with a wide range of diameters
US5628732A (en) * 1996-01-19 1997-05-13 Ethicon Endo-Surgery, Inc. Trocar with improved universal seal
DE69909931T2 (de) * 1998-04-13 2004-04-22 Applied Medical Resources Corp., Rancho Santa Margarita Kegelförmige universelle abdichtung, insbesondere für trokarbesteck
JP4500015B2 (ja) 2003-07-31 2010-07-14 オリンパス株式会社 内視鏡用オーバーチューブ
JP2008511341A (ja) * 2004-05-28 2008-04-17 ユー．エス． エンドスコピー グループ， インコーポレイテッド オーバーチューブアセンブリ
JP4648748B2 (ja) * 2005-04-19 2011-03-09 Ｈｏｙａ株式会社 内視鏡の鉗子栓
JP2007175353A (ja) 2005-12-28 2007-07-12 Fujinon Corp フード付き内視鏡
JP3129543U (ja) * 2006-10-27 2007-03-01 株式会社トップ オーバーチューブ

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5800451A (en) * 1994-01-18 1998-09-01 Willy Rusch Ag Trocar system
US5591137A (en) * 1995-07-14 1997-01-07 Merit Medical Systems, Inc. Hemostasis valve with locking seal
US6117068A (en) * 1995-10-19 2000-09-12 Elite Genetics, Inc Artificial insemination system
US6276661B1 (en) * 1996-11-06 2001-08-21 Medtronic, Inc. Pressure actuated introducer valve
US20040059297A1 (en) * 1997-05-02 2004-03-25 Racenet David C. Trocar seal system
US6702787B2 (en) * 1997-05-02 2004-03-09 Tyco Healthcare Group Lp Trocar seal system
US8192405B2 (en) * 1997-05-02 2012-06-05 Tyco Healthcare Group Lp Trocar seal system
US8267898B2 (en) * 1997-05-02 2012-09-18 Tyco Healthcare Group Lp Trocar seal system
US20120150120A1 (en) * 1997-05-02 2012-06-14 Tyco Healthcare Group Lp Trocar seal system
US7896846B2 (en) * 1997-05-02 2011-03-01 Tyco Healthcare Group Lp Trocar seal system
US8002934B2 (en) * 1997-05-02 2011-08-23 Tyco Healthcare Group Lp Trocar seal system
US20020010425A1 (en) * 2000-01-25 2002-01-24 Daig Corporation Hemostasis valve
JP2006262968A (ja) * 2005-03-22 2006-10-05 Sumitomo Bakelite Co Ltd 逆流防止弁
US20070073270A1 (en) * 2005-09-26 2007-03-29 C. R. Bard, Inc. Catheter connection systems
US20070254000A1 (en) * 2006-04-28 2007-11-01 Xiaoping Guo Biocompatible self-lubricating polymer compositions and their use in medical and surgical devices
US20090105536A1 (en) * 2006-05-30 2009-04-23 Olympus Medical Systems Corp. Endoscope treatment system
CN1907513A (zh) * 2006-07-31 2007-02-07 周泰立 用于穿刺器的单向阀
JP2008295689A (ja) * 2007-05-31 2008-12-11 Sumitomo Bakelite Co Ltd オーバーチューブ用脱気防止弁ユニット

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US20140067541A1 (en) * 2012-08-31 2014-03-06 Samsung Electronics Co. Ltd. Method and device for displaying information
US11911044B2 (en) 2013-12-17 2024-02-27 Standard Bariatrics, Inc. Resection line guide for a medical procedure and method of using same
US10987108B2 (en) 2013-12-17 2021-04-27 Standard Bariatrics, Inc. Resection line guide for a medical procedure and method of using same
US12232769B2 (en) 2014-03-17 2025-02-25 Intuitive Surgical Operations, Inc. Cannula seal assembly
US12053178B2 (en) 2014-03-29 2024-08-06 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11633184B2 (en) 2014-03-29 2023-04-25 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11510672B2 (en) 2014-03-29 2022-11-29 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11096686B2 (en) 2014-03-29 2021-08-24 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11812962B2 (en) 2014-03-29 2023-11-14 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11717295B2 (en) 2014-03-29 2023-08-08 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11324620B2 (en) 2015-09-16 2022-05-10 Standard Bariatrics, Inc. Systems and methods for measuring volume of potential sleeve in a sleeve gastrectomy
US12329668B2 (en) 2015-09-16 2025-06-17 Standard Bariatrics, Inc. Systems and methods for measuring volume of potential sleeve in a sleeve gastrectomy
US10966721B2 (en) 2017-08-14 2021-04-06 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11871927B2 (en) 2017-08-14 2024-01-16 Standard Bariatrics, Inc. End effectors, surgical stapling devices, and methods of using same
US11911033B2 (en) 2017-08-14 2024-02-27 Standard Bariatrics, Inc. Stapling systems and methods for surgical devices and end effectors
US11559305B2 (en) 2017-08-14 2023-01-24 Standard Bariatrics, Inc. Stapling systems and methods for surgical devices and end effectors
US11197672B2 (en) 2017-08-14 2021-12-14 Standard Bariatrics, Inc. Buttress systems and methods for surgical stapling devices and end effectors
US11602449B2 (en) 2019-11-04 2023-03-14 Standard Bariatrics, Inc. Systems and methods of performing surgery using Laplace's law tension retraction during surgery
US11173060B2 (en) 2019-11-04 2021-11-16 Standard Bariatrics, Inc. Systems and methods of performing surgery using Laplace's law tension retraction during surgery
US12274635B2 (en) 2019-11-04 2025-04-15 Standard Bariatrics, Inc. Systems and methods of performing surgery using laplace's law tension retraction during surgery
US12064142B2 (en) 2020-06-30 2024-08-20 Standard Bariatrics, Inc. Systems, devices, and methods for preventing or reducing loss of insufflation during a laparoscopic surgical procedure
US12295793B2 (en) 2021-03-23 2025-05-13 Standard Bariatrics, Inc. Systems and methods for preventing tissue migration in surgical staplers
US11452574B1 (en) 2021-03-23 2022-09-27 Standard Bariatrics, Inc. Systems and methods for preventing tissue migration in surgical staplers
US20230087086A1 (en) * 2021-09-21 2023-03-23 Karl Storz Se & Co. Kg Outer Shaft for an Endoscope and Endoscope System
US12336688B2 (en) * 2021-09-21 2025-06-24 Karl Storz Se & Co. Kg Outer shaft for an endoscope and endoscope system

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Publication number Publication date
CN101980654B (zh) 2013-08-07
HK1150524A1 (en) 2012-01-06
EP2255719B1 (fr) 2020-12-30
WO2009119053A1 (fr) 2009-10-01
US10433713B2 (en) 2019-10-08
EP2255719A1 (fr) 2010-12-01
JP5120449B2 (ja) 2013-01-16
JPWO2009119053A1 (ja) 2011-07-21
EP2255719A4 (fr) 2013-03-06
KR20100134633A (ko) 2010-12-23
US20170215708A1 (en) 2017-08-03
KR101118319B1 (ko) 2012-03-09
CN101980654A (zh) 2011-02-23

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