LIQUID CONTAINER HAVING PRESSURE-PROTECTED DIALYZING MEMBRANE

• US 3,640,393 A
• Filed: 09/04/1970
• Issued: 02/08/1972
• Est. Priority Date: 08/20/1970
• Status: Expired due to Term

• Current Assignee: Carl R. Hurtig
• Original Assignee: Carl R. Hurtig
• Inventors: Hurtig, Carl R.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/069,767
• Time in Patent Office: 522 Days
• Field of Search: 210/22,321 128/2R,2F,214R,DIG.5 23/258.5 73/425.6
• US Class Current: 210/321.84
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/150251 Collection chamber divided into at least two compartments, e.g. for division of samples injection syringes having more than one chamber A61M5/19; syringes for injection of two or more media A61M5/2448, A61M5/284; sample preparation for further analysis A61B5/150755
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150274 Manufacture or production processes or steps for blood sampling devices
• CPC Class Codes: A61B 5/150343 Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes sampling from within body cavities A61B5/150015, A61B5/150045
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• CPC Class Codes: A61B 5/150786 Optical identification systems, e.g. bar codes, colour codes
• CPC Class Codes: A61B 5/150946 Means for varying, regulating, indicating or limiting the speed or time of blood collection
• CPC Class Codes: A61B 5/154 Devices using pre-evacuated means
• CPC Class Codes: A61J 1/05 for collecting, storing or administering blood, plasma or medical fluids multiple bags systems for separating or storing blood components A61M1/0209; Infusion or perfusion containers
• CPC Class Codes: A61J 1/12 with means for holding samples of contents
• CPC Class Codes: B01D 61/28 Apparatus therefor

Abstract

A liquid container has a dialyzing membrane forming first and second compartments within a chamber on either side of the membrane. An inlet passage feeds into only the first compartment, which is pumpable to aspirate liquid into it via the inlet passage. A liquid-pervious member in the first compartment backs up the membrane to support it when there is a greater pressure in the second compartment than in the first.

Claims

1. Liquid container apparatus comprising A. liquid-impervious wall means forming a chamber with at least a collapsible and resiliently restoring externally accessible wall portion, B. a dialyzing membrane within said chamber dividing the chamber interior into at least first and second compartments arranged with said collapsible wall portion forming at least part of the wall of said first chamber, C. inlet tubing means feeding into only said first of said first and second compartments, and said first compartment being closed except for said inlet tubing means and the porosity of said membrane, and D. a liquid-pervious support member adjacent the side of said membrane in said first compartment and supporting said membrane against a greater pressure in said second compartment than in said first compartment.

2. Container apparatus as defined in claim 1 in which A. said wall means forms said chamber with two opposed wall portions at least a first of which is externally accessible and collapsible and resiliently restoring, B. said dialyzing membrane is disposed in said chamber between said two opposed wall portions such that said first wall portion formS a portion of said first compartment, and C. said support member is essentially contiguous with said membrane along the membrane span within said chamber.

3. Container apparatus as defined in claim 1 in which said support member is a thin sheetlike member substantially coextensive with said membrane within said chamber and secured to the walls of said chamber.

4. Container apparatus as defined in claim 1 in which said support member has lesser elasticity than said membrane and is subjected to tensile stress when said membrane receives a greater pressure in said second compartment than in said first compartment.

5. Container apparatus as defined in claim 1 A. in which said membrane is secured to the walls of said chamber along a closed path, and B. in which said support member is a sheet having lesser elasticity than said membrane and is secured to the walls of said chamber along said closed path with a span therebetween adjacent said membrane and having no more slack than said membrane.

6. A container for the collection, storage and dialysis of a liquid, said container comprising A. a tubelike collection passage having first and second ends and a first storage volume therein between said ends, B. a first chamber compartment connected with said first end of said passage to receive liquid therefrom, said first compartment resiliently maintaining a normal uncollapsed shape and being resiliently collapsible to expel fluid therefrom by way of said passage and resiliently recovering said normal uncollapsed shape when said second end of said passage is open to aspirate fluid thereinto, C. a semipermeable dialysis membrane forming part of the wall of said first chamber compartment, D. a second chamber compartment contiguous with said first compartment and having said semipermeable dialysis membrane forming also a portion thereof for the passage of dialayzte between said first and second compartments through said membrane, and forming with said first compartment an enclosure normally fluidtight except for the entry of said passage into said first compartment, and E. liquid-pervious sheetlike means disposed in said first compartment and supportingly backing said membrane against a greater pressure in said second compartment than in said first compartment.

7. A container as defined in claim 6 in which said first chamber compartment is sufficiently large and sufficiently resiliently collapsible to diminish the storage volume thereof by at least twice said first storage volume.

8. A container for the collection, storage and dialysis of liquid, said container comprising A. a manually holdable body casing sufficiently rigid to be self-supporting, B. means forming a pouchlike chamber on said casing between opposed chamber walls secured together about the chamber periphery at said casing, C. a dialysis membrane secured within said chamber to the juncture of said chamber walls with said casing, and spanning the interior of said chamber to form therein first and second compartments on either side thereof and sealed from each other except through the porosity of said membrane, D. means forming a fluid passage having an inlet end and feeding at the other end thereof into only the first of said first and second compartments, and E. a liquid-pervious and essentially inelastic membrane-supporting sheet member having a peripheral portion secured to the walls of said chamber and having an internal portion disposed in said first compartment adjacent and coextensive with said span of said membrane.