Raifu Matsui

Bio: Raifu Matsui is an academic researcher. The author has contributed to research in topics: Tube (fluid conveyance) & Tube (container). The author has an hindex of 5, co-authored 6 publications receiving 893 citations.

Endoscopic system and method for positioning an indwelling tube

Abstract: An endoscope including; a fixing member detachably mounted to a distal end portion of an endoscope insertion part for detachably fixing and holding a distal end portion of an indwelling tube or a distal end portion of a guide member for guiding the indwelling tube, both of which are provided along the axial direction of the insertion part, to the distal end portion of the insertion part.

Overtube for endoscope and endoscope system

Abstract: An overtube for an endoscope includes a tube body, a balloon, a first-communication-path, a second-communication-path, a first-mouthpiece, a second-mouthpiece, a first-connection-section which is provided on the first-mouthpiece, and a second-connection-section which is provided on the second-mouthpiece. The balloon is dilatably/deflatably provided on the tube body. The first-communication-path extends from a distal-end-portion toward a proximal-end-portion of the tube body in a state in which the first-communication-path communicates with the balloon. The second-communication-path extends from a hollow-portion toward the proximal-end-portion of the tube body. The first-mouthpiece projects from the tube body and includes a path communicating with the first-communication-path. The second-mouthpiece projects from the tube body and includes a path communicating with the second-communication-path. The first-connection-section is connected to a first-feed-portion of a fluid-feed-mechanism and is prevented from being connected to a second-feed-portion of the fluid-feed-mechanism. The second-connection-section is connected to the second-feed-portion and is prevented from being connected to the first-feed-portion.

Endoscopic insertion aid

Abstract: An endoscopic insertion aid (14) includes a hollow member (62) having a communication path which provides communication between openings at the distal and proximal ends thereof. The hollow member includes a hollow member, an exposure portion and a guide portion. The hollow member insertion portion is inserted into a body cavity, having distal and proximal ends. The exposure portion is provided at the proximal end of the hollow member insertion portion and is exposed outside the body. The guide portion is provided in at least the exposure portion of the hollow member insertion portion and the exposure portion. The guide portion allows a distal end (32) of an insertion section (22) of an endoscope (12) to pass through the communication path laterally from the hollow member (62) and project from the opening at the distal end of the hollow member.

Endoscopic insertion aid and endoscopic system

Abstract: An endoscopic insertion aid (14) includes a tube member (62), a pipeline (68, 70) and a plurality of balloons (66a, 66b, 66c). The tube member allows an insertion section (32) of an endoscope (12) to be inserted therethrough, and guides the longitudinal movement of the insertion section. The pipeline is provided in the tube member, and communicates with a supply/discharge unit (22) to supply a fluid to or discharge the fluid from the distal end of the tube member. The balloons are disposed on the outer periphery of the distal end of the tube member longitudinally along the tube member, communicate with the pipeline, and inflate/deflate in accordance with the supply/discharge of the fluid via the pipeline. The balloon (66a) disposed on the distal side of the tube member is inflated to have an outside diameter larger than that of the balloon (66c) disposed closer to the proximal side than the balloon disposed on the distal side when the balloons are inflated.

Endoscopic insertion aid, endoscopic system, and method of inserting insertion portion of endoscope into body cavity by use of endoscopic insertion aid

Abstract: An endoscopic insertion aid includes a tube member, a pipeline and a plurality of balloons. The tube member allows an insertion section of an endoscope to be inserted therethrough, and guides the longitudinal movement of the insertion section. The pipeline is provided in the tube member, and communicates with a supply/discharge unit to supply a fluid to or discharge the fluid from the distal end of the tube member. The balloons are disposed on the outer periphery of the distal end of the tube member longitudinally along the tube member, communicate with the pipeline, and inflate/deflate in accordance with the supply/discharge of the fluid via the pipeline. The balloon disposed on the distal side of the tube member is inflated to have an outside diameter larger than that of the balloon disposed closer to the proximal side than the balloon disposed on the distal side when the balloons are inflated.

Surgical Stapling Apparatus

Abstract: A surgical stapling device particularly suited for endoscopic procedures is described The device includes a handle assembly and an elongated body extending distally from the handle assembly The distal end of the elongated body is adapted to engage a disposable loading unit A control rod having a proximal end operatively connected to the handle assembly includes a distal end extending through the elongated body A control rod locking member is provided to prevent movement of the control rod until the disposable loading unit is fully secured to the elongated body of the stapling device

Surgical stapling instrument

Abstract: A surgical stapling instrument (1) comprises a body portion (2, 3), a handle (4) and a staple fastening assembly (8). The staple fastening assembly (8) includes a curved cartridge (10), which comprises at least one curved open row of staples, and a curved anvil (22), which is adapted to cooperate with the cartridge (10) for forming the ends of the staples exiting from the cartridge (10). The staple fastening assembly (8) is adapted to allow unobstructed access towards the concave inner faces of the cartridge (10) and the anvil (22). The cartridge (10) can be moved towards the anvil (22) from a spaced position for positioning tissue therebetween to a closed position for clamping the tissue. Preferably, a knife is contained within the cartridge (10) and is positioned such that there is at least one row of staples on at least one side of the knife.

Display screen or portion thereof with graphical user interface

Abstract: Newness and distinctiveness is claimed in the features of ornamentation as shown inside the broken line circle in the accompanying representation.

Surgical stapling instrument with an articulatable end effector

Abstract: A surgical instrument can comprise a channel configured to support a staple cartridge and, in addition, an anvil pivotable between open and closed positions relative to the channel. The surgical instrument can further comprise a cutting member configured to incise tissue positioned captured between the staple cartridge and the anvil and, in addition, means for stopping the cutting member prior to a distal end datum, wherein the distal end datum can be defined by the distal-most staple cavity in the staple cartridge. In such embodiments, the incision within the tissue may not extend beyond the portion of the tissue that has been stapled.

Articulating surgical stapling instrument incorporating a two-piece e-beam firing mechanism

Abstract: A surgical severing and stapling instrument, suitable for laparoscopic and endoscopic clinical procedures, clamps tissue within an end effector of an elongate channel pivotally opposed by an anvil. An E-beam firing bar moves distally through the clamped end effector to sever tissue and to drive staples on each side of the cut. The E-beam firing bar affirmatively spaces the anvil from the elongate channel to assure properly formed closed staples, especially when an amount of tissue is clamped that is inadequate to space the end effector. In particular, an upper pin of the firing bar longitudinally moves through an anvil slot and a channel slot is captured between a lower cap and a middle pin of the firing bar to assure a minimum spacing. Forming the E-beam from a thickened distal portion and a thinned proximal strip enhances manufacturability and facilitates use in such articulating surgical instruments.