EP0223451A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in or relating to devices for sampling, drainage or infusion of liquids from or to the human or animal body
Assignee: Pharmacia Ltd
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Filing: 1986-10-28
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Granted: —
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Expires: 2006-10-28
Abstract
Abstract A device for use in the sampling or infusion of liquids from or to the human or animal body, comprising a chamber for receiving fluid, a cannula in communication with the chamber, at least one valve means operable in an open condition to connect the chamber with a source or drain of liquid and in a closed condition to seal the chamber therefrom, and chamber venting means allowing the escape of air from the chamber while preventing the escape of liquid therefrom.
Inventors
- 👤 Jeffrey Alan Cox
- 👤 Liakatali G. H. Parapia
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:08
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/158; A61M39/00; A61M39/02; A61M39/06; A61M39/0693
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A device for use in the sampling or infusion of liquids from or to the human or animal body comprising a chamber (1) for receiving fluid, a cannula (2) in communication with the chamber (1), at least one valve means (3) operable in an open condition to connect the chamber (1) with a source or drain of liquid and in a closed condition to seal the chamber (1) therefrom, and chamber venting means (5) allowing the escape of air from the chamber (1) whilst preventing the escape of liquid therefrom.
Claim 2
Independent Claim
90 words
A device for use in the sampling or infusion of liquids from or to the human or animal body comprising a chamber (1) for receiving fluid, a cannula (2) in communication with the chamber (1), at least one valve means (3) operable in an open condition to connect the chamber (1) with a source or drain of liquid and in a closed condition to seal the chamber (1) therefrom, and chamber venting means (5) allowing the escape of air from the chamber (1) whilst preventing the escape of liquid therefrom.
Claim 3
Dependent Claim
39 words
A device as claimed in claim 1 wherein the venting means (5) is a hydrophobic filter comprising an air permeable barrier of a hydrophobic material, preferably polytetrafluoroethylene having a pore size in the range of 0.2 to 0.5 micron.
Claim 4
Dependent Claim
45 words
A device as claimed claim 1 or claim 2 wherein the or one of the valve means (3) is disposed in a position and orientation permitting an elongate member penetrating the valve means (3) to extend linearly through the chamber (1) and the cannula (2).
Claim 5
Dependent Claim
58 words
A device as claimed in claim 3 wherein the cannula (2) communicates with one end of the chamber (1), a first valve means (20) is disposed at the opposite end of the chamber for admitting an elongate member and a second valve means (19) is disposed at an intermediate position in a side port (18) of the chamber.
Claim 6
Dependent Claim
74 words
A device as claimed in claim 3 or claim 4 wherein the cannula (2) communicates with one end of the chamber (1) and the venting means (5) is disposed at or adjacent to the opposite end of the chamber so that, in use, the venting means (5) is disposed as far away as possible from the body and so that, in use, the venting means releases air from the uppermost portion of the chamber.
Claim 7
Independent Claim
83 words
A device as claimed in any one of the preceding claims wherein the or at least one of the valve means (3) comprises an elastomeric membrane having a central puncture (4), which membrane may be penetrated at the puncture site by a co-operating ducted member (9) to provide a flow path through the membrane in an open condition of the valve means (3) and which is self sealing on withdrawal of the member (9) in a closed condition of the valve means (3).
Claim 8
Dependent Claim
31 words
A device as claimed in claim 6 in which the outer surface of the membrane with respect to the chamber lies substantially flush with the surrounding outer surface of the device.
Claim 9
Dependent Claim
29 words
A device as claimed in claim 6 or claim 7 which includes means for fastening the co-operating member to the device in the open condition of the valve means.
Claim 10
Dependent Claim
24 words
A device as claimed in claim 7 or claim 8 wherein the membrane is made from an uncured rubber material or from silicone rubber.
Claim 11
Independent Claim
55 words
A device as claimed in any one of the preceding claims in combination with an adaptor (8) comprising a co-operating ducted member (9) having a distal end for use in penetrating the membrane at the puncture site (4), and means for connection of a proximal end of the ducted member (9) to a catheter (12).
References Cited (Backward Citations)
DE3100442C1
Cited
GB2048681A
Cited
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