INTRODUCER SHEATH, PLACEMENT DEVICE FOR BLOOD VESSEL TREATMENT INSTRUMENT, AND METHOD FOR SHORTENING INTRODUCER SHEATH
First Claim
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1. An introducer sheath into which is insertable an elongated shaft, the introducer sheath comprising:
- a hub possessing a distal end;
a flexible tubular sheath body possessing a proximal-most portion and a distal-most portion;
a movable shortening member mounted on the hub;
the proximal-most portion of the sheath body including a plurality of axially extending slits which circumferentially separate a plurality of terminal portions of the sheath body, at least one of the terminal portions being connected to the shortening member, and the distal-most portion of the sheath body extending distally beyond the distal end of the hub; and
the shortening member being movable relative to the hub to move the sheath body relative to the hub and shorten an axial extent to which the distal-most portion of the sheath body extends distally beyond the distal end of the hub.
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Abstract
A placement device for a blood vessel treatment instrument has an introducer sheath functioning as an outer tube, and also has an inner tube. The introducer sheath has a flexible tube-shaped sheath body and a hub into which the base end of the sheath body is inserted. The hub takes-up the base end of the sheath body into the hub by way of take-up shafts while slitting the base end of the sheath body by cutting blades, and thus the length of extension of the sheath body from the hub can be shortened.
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Citations
20 Claims
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1. An introducer sheath into which is insertable an elongated shaft, the introducer sheath comprising:
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a hub possessing a distal end; a flexible tubular sheath body possessing a proximal-most portion and a distal-most portion; a movable shortening member mounted on the hub; the proximal-most portion of the sheath body including a plurality of axially extending slits which circumferentially separate a plurality of terminal portions of the sheath body, at least one of the terminal portions being connected to the shortening member, and the distal-most portion of the sheath body extending distally beyond the distal end of the hub; and the shortening member being movable relative to the hub to move the sheath body relative to the hub and shorten an axial extent to which the distal-most portion of the sheath body extends distally beyond the distal end of the hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An introducer sheath into which is insertable an elongated shaft, the introducer sheath comprising:
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a flexible tube-shaped sheath body possessing a proximal portion and a distal portion; a hub in which the proximal portion of the sheath body is positioned with the distal portion of the sheath body extending distally beyond a distal end of the hub; and the hub being configured to take-up the proximal portion of the sheath body into the hub while slitting the proximal portion of the sheath body to shorten a length of the sheath body extending distally beyond the distal end of the hub. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A blood vessel treatment instrument placement device by which a self-expanding blood vessel treatment instrument is delivered to and placed indwelling in a desired treatment site in a blood vessel, the blood vessel treatment instrument placement device comprising:
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an introducer sheath having a sheath body for housing the blood vessel treatment instrument on an inner circumference of a distal portion of the sheath body; an inner tube slidably positioned inside the sheath body; the introducer sheath comprising; a flexible tube-shaped sheath body possessing a proximal portion and a distal portion; a hub in which the proximal portion of the sheath body is positioned with the distal portion of the sheath body extending distally beyond a distal end of the hub; and the hub being configured to take-up the proximal portion of the sheath body into the hub while slitting the proximal portion of the sheath body to shorten a length of the sheath body extending distally beyond the distal end of the hub.
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18. A method for shortening an introducer sheath in which an elongated shaft is inserted, the method comprising:
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slitting a proximal portion of a sheath body positioned in a hub to form at least two terminal portions at the proximal portion of a sheath body; drawing the sheath body into the hub in which the proximal portion of the sheath body is positioned; and taking up the terminal pieces of the sheath body. - View Dependent Claims (19, 20)
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Specification