Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1986-05-07
1987-11-10
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604167, A61M 2500, A61M 500
Patent
active
047055111
ABSTRACT:
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.
REFERENCES:
patent: 3426744 (1969-02-01), Ball
patent: 4000739 (1977-01-01), Stevens
patent: 4100309 (1978-07-01), Micklus et al.
patent: 4240411 (1980-12-01), Hosono
patent: 4261357 (1981-04-01), Kontos
patent: 4424833 (1984-01-01), Spector et al.
Bipore, Inc.
Pellegrino Stephen C.
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