Shielded cannula assembly
First Claim
Patent Images
1. A shielded cannula assembly comprisinga housing;
- a hollow cannula mounted in and extended from said housing, said cannula having a lumen for passage of a fluid therethrough;
a tubular shield extending from said housing in an exposed manner relative to the surrounding environment, said shield having 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 wall being made of a material 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 cannula therefrom; and
means for selectively preventing longitudinal collapsing of said tubular portion.
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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.
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Citations
14 Claims
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1. A shielded cannula assembly comprising
a housing; -
a hollow cannula mounted in and extended from said housing, said cannula having a lumen for passage of a fluid therethrough; a tubular shield extending from said housing in an exposed manner relative to the surrounding environment, said shield having 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 wall being made of a material 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 cannula therefrom; and means for selectively preventing longitudinal collapsing of said tubular portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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; a one piece elastomeric shield extending from said housing in an exposed manner relative to the surrounding environment, said shield having 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; and means for selectively preventing longitudinally collapsing of said tubular portion. - View Dependent Claims (9, 10, 11, 12)
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13. A shielded hypodermic needle assembly
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; a one piece elastomeric shield extending from said housing, said shield having 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; and means removably mounted about said tubular portion for selectively preventing longitudinal collapsing of said tubular portion. - View Dependent Claims (14)
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Specification