Variable-volume vented container
First Claim
1. An operable variable-volume vented container assembly for use in administering parenteral fluids comprising:
- an elongate housing having a chamber for retaining fluid;
a distal end portion of said housing having a passageway therethrough communicating with said chamber;
venting means in said housing, independent of said passageway, communicating between said chamber and the exterior of said housing for allowing air to enter said chamber as fluid leaves said chamber through said passageway, said venting means including an air-permeable liquid-impermeable element positioned to allow gases passing through said venting means to pass through said element, said element being porous and capable of developing sufficiently high surface tension under liquid contact to serve as a barrier against liquid passage therethrough during normal use of said container assembly;
a stopper slidably positioned in fluid-tight engagement inside said housing, said stopper capable of being moved by fluid pressure in said chamber, the fluid containing volume of said container being variable and related to the distance between said stopper and said distal end of said housing; and
cooperating means for establishing fluid communication between said chamber and a non-vented parenteral fluid administration set through said passageway.
1 Assignment
0 Petitions
Accused Products
Abstract
An operable variable-volume vented container assembly for use in administering parenteral fluids includes a housing having a chamber for retaining fluid. A distal end portion of the housing has a passsageway therethrough for communicating with the chamber. Venting means communicating between the chamber and the exterior of the housing, for allowing air to enter the housing as fluid leaves the chamber through the passageway, is provided. The venting means includes an air-permeable liquid-impermeable element positioned to allow gases passing through the venting means to pass through the element. The element is porous and capable of developing sufficiently high surface tension under contact to serve as a barrier against liquid passsage therethrough during normal use of the container assembly. A stopper is slidably positioned in fluid tight engagement inside the housing.
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Citations
22 Claims
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1. An operable variable-volume vented container assembly for use in administering parenteral fluids comprising:
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an elongate housing having a chamber for retaining fluid; a distal end portion of said housing having a passageway therethrough communicating with said chamber; venting means in said housing, independent of said passageway, communicating between said chamber and the exterior of said housing for allowing air to enter said chamber as fluid leaves said chamber through said passageway, said venting means including an air-permeable liquid-impermeable element positioned to allow gases passing through said venting means to pass through said element, said element being porous and capable of developing sufficiently high surface tension under liquid contact to serve as a barrier against liquid passage therethrough during normal use of said container assembly; a stopper slidably positioned in fluid-tight engagement inside said housing, said stopper capable of being moved by fluid pressure in said chamber, the fluid containing volume of said container being variable and related to the distance between said stopper and said distal end of said housing; and cooperating means for establishing fluid communication between said chamber and a non-vented parenteral fluid administration set through said passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An operable variable-volume vented container assembly for use in administering parenteral fluids comprising:
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a housing having a chamber for retaining fluid; a distal end portion of said housing having a passageway therethrough communicating with said chamber; venting means in said housing, independent of said passageway, communicating between said chamber and the exterior of said housing for allowing air to enter said chamber as fluid leaves said chamber through said passageway, said venting means including an air-permeable liquid-impermeable means positioned to allow gases passing through said venting means to pass through said element; and a stopper slidably positioned in fluid-tight engagement inside said housing.
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17. An operable vented receptacle for use in administering parenteral fluids comprising:
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an elongate substantially cylindrical housing having an interior wall defining a chamber for retaining fluid, said chamber having an open proximal end, said chamber including means for accepting a resilient stopper in slidable fluid-tight engagement therein; a tip extending from a distal end of said housing having a passageway therethrough communicating with said chamber, said tip including means for engaging a nonvented parenteral fluid administration set so that there is fluid communicating between said chamber and the administration set; and venting means in said housing, independent of said passageway, communicating between said chamber and the exterior of said housing for allowing air to enter said chamber as fluid leaves said chamber through said passageway, said venting means including an air-permeable, liquid-impermeable element positioned to allow gases passing through said venting means to pass through said element, said element being porous and capable of developing sufficiently high surface tension under liquid contact to serve as a barrier against liquid passage therethrough during normal use of said receptacle.
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18. An operable disposable variable-volume container assembly for use in administering parenteral fluids comprising:
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an elongate substantially cylindrical housing having a chamber for retaining fluid; a tip extending from a distal end of said housing having a passageway therethrough communicating with said chamber, said tip adapted to engage a non-vented parenteral fluid administration set so that there is fluid communicating between said chamber and the administration set; venting means in said housing, independent of said passsageway, communicating between said chamber and the exterior of said housing for allowing air to enter said chamber as fluid leaves said chamber through said passageway, said venting means including an air-permeable liquidimpermeable element positioned to allow gases passing through said venting means to pass through said element, said element being porous and capable of developing sufficiently high surface tension under liquid contact to serve as a barrier against liquid passage therethrough during normal use of said container assembly; a stopper slidably positioned in fluid-tight engagement inside said housing, said stopper capable of being moved by fluid pressure in said chamber, the fluid containing volume of said container being variable and related to the distance between said stopper and said distal end; closure means for releasably sealing said passageway; and a therapeutic liquid in said chamber substantially between said stopper and said distal end of said housing. - View Dependent Claims (19, 20, 21, 22)
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Specification