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Bipore, Inc.

Nuri Kocak

An introducer sheath includes a connector body having an inlet and an outlet; a flexible tube for intravenous use at the outlet, including a helical coiled spring having a plurality of coils, each coil spaced from an adjacent coil, and a thin cylindrical wall prepared from a protective coating composition completely surrounding the spring to define an inner and an outer wall surface, the cylindrical wall surrounding said spring having a substantially constant wall thickness throughout its length, the coating composition comprising a thermoplastic polymeric material dissolved in a solvent solution, the composition having a solids content ranging from about 4% to about 18%, and said solution comprising a solvent selected from the group consisting of tetrahydrofuran, dioxane, methyl ethyl ketone, dimethylformamide, cyclohexane, and mixtures thereof, formed on a helical coiled spring by dipping the latter therein and then drying at room temperature; and a valve assembly including a first elastic membrane having a central aperture, and a second elastic membrane in sealing contact with the first elastic membrane and having a slit extending therethrough at an angle to the direction of fluid flow in the introducer sheath, the slit being in fluid communication with the central aperture.

Introducer sheath assembly

An introducer sheath includes a connector body having an inlet and an outlet; a flexible tube for intravenous use at the outlet, including a helical coiled spring having a plurality of coils, each coil spaced from an adjacent coil, and a thin cylindrical wall prepared from a protective coating composition completely surrounding the spring to define an inner and an outer wall surface, the portion of the cylindrical wall surrounding each coil having a first thickness and the portion of the cylindrical wall between the spaced coils having a second, smaller thickness, with the inner and outer wall surfaces being indented thereat, the coating composition comprising a thermoplastic polymeric material dissolved in a solvent solution, the composition having a solids content ranging from about 4% to about 18%, and said solution comprising a solvent selected from the group consisting of tetrahydrofuran, dioxane, methyl ethyl ketone, dimethylformamide, cyclohexane, and mixtures thereof, formed on a helical coiled spring by dipping the latter therein and then drying at room temperature; and a valve assembly including a first elastic membrane having a central aperture, and a second elastic membrane in sealing contact with the first elastic membrane and having a slit extending therethrough at an angle to the direction of fluid flow in the introducer sheath, the slit being in fluid communication with the central aperture.

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Cliffside Park, NJ, United States of America

Nuri Kocak