Universal administration port
AssigneeBaxter Travenol Laboratories, Inc.
InventorStephen Pearson
Life of this patent
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Abstract
An administration port (14) for medical fluid containers (10) is provided which creates a proper seal with a broad dimensional range of cannulas. The port includes an inwardly tapered end 28 which can flex outwardly during insertion of a cannula (16). The inwardly tapered end 28 works in conjunction with an inner surface (32) of the sidewall (18) and end (28) to provide a unique sealing construction, to minimize friction between the port (14) and the cannula (16) during insertion of the cannula (16) and to inhibit inadvertent removal of the cannula. Selective removal of the associated cannula requires relatively little force, however.
Claims8
A fluid container administration port for use with an associated cannula, comprising:
- (a) a continuous sidewall;
- (b) a cannula-pierceable membrane extending across a base of said sidewall;
- (c) an inwardly tapered end continuous with said sidewall and opposite said base and said membrane;
- (d) a volume-defining inner surface of said sidewall and said inwardly tapered end;
- (e) said inner surface being substantially concentric about a longitudinal axis of said port taken through the center of said membrane and the center of a circular opening defined by said inwardly tapered end;
- (f) such that diameter measurements, taken across said defined volume so as to span said inner surface, increase along said longitudinal axis from said membrane substantially up to said inwardly tapered end and decrease along said longitudinal axis from the commencement of said inwardly tapered end up to said end-defined circular opening;
- (g) said diameter measurement at said circular opening being not greater than said diameter measurement at said membrane;
- (h) wherein said diameter measurements are such that upon insertion of an associated cannula, that portion of said inner surface at said circular opening provides a circumferential seal about the associated cannula before the cannula pierces said membrane.
Dependencies are inferred from the claim text.