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US 5,290,254 AGranted
Shielded cannula assembly
OwnerVincent L. Vaillancourtinventor
Life of this patent
Estimating the term…
Abstract
The shielded cannula assembly includes a tubular shield of latex rubber which is mounted over the cannula of the assembly. The shield includes a resilient collapsible tubular portion which is able to collapse in an accordion-like manner when a longitudinal force is imposed thereon. The shield also has a cap at the distal end which seals off a chamber in which the cannula is contained in a sterile manner. The cap includes a transverse wall which may be pierced by the cannula when the cannula is passed into a vial of medication or into a connector of an administration set.
Claims19
A shielded cannula assembly comprising
- a housing;
- a hollow cannula mounted in and extending from said housing, said cannula having a lumen for passage of a fluid therethrough;
- and
- one-piece tubular shield extending from said housing in an exposed manner relative to the surrounding environment, said shield consisting of a resilient longitudinally collapsible tubular portion concentrically about said cannula and a transverse wall at a distal end to form a sealed chamber with said tubular portion to contain said cannula therein in a sterile condition, said tubular portion being collapsible from an extended position about said cannula under a longitudinally applied force into a collapsed condition and being resiliently expandable into said extended position upon release of said force, said wall having an uninterrupted end face and being made of a material to permit penetration of said cannula therethrough in response to longitudinal collapsing of said tubular portion and resealing of said wall in response to expansion of said tubular portion and withdrawal of said cannula therefrom.
1 more element
A shielded cannula assembly as set forth in 1 wherein said wall has a flat end face for abutting a septum of a vial containing fluid.
A shielded hypodermic needle assembly comprising
- a housing defining a chamber;
- a hollow hypodermic needle mounted in and extending from said housing, said needle having a lumen in communication with said chamber;
- and
- a one piece elastomeric shield extending from said housing in an exposed manner relative to the surrounding environment, said shield consisting of a resilient longitudinally collapsible tubular portion concentrically about said needle and a cap defining a transverse wall at a distal end to form a sealed chamber with said tubular portion to contain said needle therein in a sterile condition, said tubular portion being collapsible from an extended position about said cannula under a longitudinally applied force into a collapsed condition and being resiliently expandable into said extended position upon release of said force.
1 more element
A shielded hypodermic needle assembly comprising
- a housing defining a chamber;
- a hollow hypodermic needle mounted in and extending from said housing, said needle having a lumen in communication with said chamber;
- and
- a one piece elastomeric shield extending from said housing, said shield consisting of a resilient longitudinally collapsible tubular portion concentrically about said needle and an enlarged relatively rigid cap defining a transverse wall at a distal end, said wall being sized to permit penetration of said needle therethrough in response to longitudinal collapsing of said tubular portion and resealing of said wall in response to expansion of said tubular portion and withdrawal of said needle therefrom.
1 more element
A shielded cannula assembly comprising
- a cup-shaped housing for receiving a blood collecting tube;
- a hub integral with said housing;
- a first cannula extending from said hub;
- a one piece tubular shield extending from said hub, said shield consisting of a resilient longitudinally collapsible tubular portion about said cannula and a transverse wall at a distal end for selective passage of said cannula therethrough;
- said wall being sized to permit penetration of said cannula therethrough in response to longitudinal collapsing of said tubular portion and resealing of said wall in response to expansion of said tubular portion and withdrawal of said cannula therefrom;
- a second cannula extending from said hub and being in communication with said first cannula to pass fluid therebetween;
- and
- a valve mounted on said hub and over said second cannula for selective passage of said second cannula therethrough into a blood collecting tube received in said housing.
5 more elements
A shielded cannula assembly comprising
- a housing;
- a pair of cannulae, each cannula extending from a opposite end of said housing and having a lumen in communication with a lumen of the other of said cannulae;
- a pair of one piece tubular shields, each shield extending from an opposite end of said housing and consisting of a resilient longitudinally extending collapsible portion about a respective cannula and a transverse wall at a distal end for selective passage of said respective cannula therethrough, said wall being sized to permit penetration of said cannula therethrough in response to longitudinal collapsing of said tubular portion and resealing of said wall in response to expansion of said tubular portion and withdrawal of said cannula therefrom.
Dependencies are inferred from the claim text.