EP0268480A1
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 Biosystems Ltd
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Filing: 1987-11-19
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Granted: —
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Expires: 2007-11-19
Abstract
Abstract A device for use in the sampling or infusion of liquids from or to the human or animal body having a first connecting means (8) for connection to a cannula, a second connecting means (13) for connection to a source or drain of liquid and valve means (4,9) operable to open or close a flow path therebetween, the arrangement being such that in a closed condition of the valve means each of the connecting means is connected to a respective chamber (6, 7), each chamber having a respective venting means (20, 21) allowing the escape of air therefrom whilst preventing the escape of liquid and such that in an open condition of the valve means a flow path is established from one connecting means to the other through at least one of the chambers. The device allows connection to be made without spillage and removes air from the liquid.
Inventors
- 👤 Jeffrey Alan Cox
- 👤 Liakatali Gulamhussein Habib Parapia
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:56
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/04; A61M39/045; A61M39/06; A61M39/0693; A61M39/22; A61M39/26; A61M2039/266; Y; Y10; Y10S; Y10S604/00; Y10S604/905
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
A device (1) for use in the sampling or infusion of liquids from or to the human or animal body having a first connecting means (8) for connection to a cannula, a second connecting means (13) for connection to a source or drain of liquid and valve means (4, 9) operable to open or close a flow path therebetween, the arrangement being such that in a closed condition of the valve means each of the connecting means is connected to a respective chamber (6, 7) characterised by each chamber having a respective venting (20, 21) means allowing the escape of air therefrom whilst preventing the escape of liquid and such that in an open condition of the valve means a flow path is established from one connecting means to the other through at least one of the chambers.
Claim 2
Independent Claim
138 words
A device (1) for use in the sampling or infusion of liquids from or to the human or animal body having a first connecting means (8) for connection to a cannula, a second connecting means (13) for connection to a source or drain of liquid and valve means (4, 9) operable to open or close a flow path therebetween, the arrangement being such that in a closed condition of the valve means each of the connecting means is connected to a respective chamber (6, 7) characterised by each chamber having a respective venting (20, 21) means allowing the escape of air therefrom whilst preventing the escape of liquid and such that in an open condition of the valve means a flow path is established from one connecting means to the other through at least one of the chambers.
Claim 3
Dependent Claim
64 words
A device as claimed in claim 1 characterised in that the valve means comprises an elastomeric membrane (4) which separates one chamber from the other and which is penetrable by a co-operating ducted member (9) to provide an open condition of the valve means and which membrane is self sealing on withdrawal of the member to provide a closed condition of the valve means.
Claim 4
Dependent Claim
71 words
A device as claimed in claim 2 characterised in that the ducted member defines a duct (11) connected at one end to the second connecting means, the other end of the duct communicating in the open condition of the valve means with a first of the chambers (6) connected to the first connecting means and in the closed condition of the valve means communicating with a second of the chambers (7).
Claim 5
Dependent Claim
47 words
A device as claimed in claim 3 characterised in that the membrane is provided with a zone of weakness (22) to assist penetration of the ducted member when first penetrated, which zone of weakness defines a puncture site (23) at which the membrane is punctured in use.
Claim 6
Dependent Claim
22 words
A device as claimed in claim 4 characterised in that the zone of weakness comprises a cruciform cut extending through the membrane.
Claim 7
Dependent Claim
35 words
A device as claimed in claim 3 characterised in that the membrane includes a preformed central puncture extending through the membrane and defining a puncture site at which the ducted member may penetrate in use.
Claim 8
Independent Claim
28 words
A device as claimed in any of claims 3 to 6 in that the membrane is radially compressed to assist self sealing on withdrawal of the ducted member.
Claim 9
Independent Claim
76 words
A device as claimed in any of claims 3 to 7 characterised in that the second chamber defines a cylindrical bore (3) within which a piston portion of the ducted member is axially slideable, the ducted member having a ducted precursive end portion (12) of reduced diameter extending towards and in axial alignment with the puncture site of the membrane whereby the ducted member is axially moveable into and out of penetrating engagement with the membrane.
Claim 10
Dependent Claim
24 words
A device as claimed in claim 8 characterised in that the precursive end portion is axially tapered towards the membrane to facilitate penetration thereof.
Claim 11
Independent Claim
33 words
A device as claimed in any of claims 2 to 9 characterised by comprising externally accessible handle means (38, 39) for urging the ducted member into and out of penetration with the membrane.
Claim 12
Dependent Claim
25 words
A device as claimed in claim 10 characterised by including locking means (40, 41) for selectively locking the ducted member in its membrane penetrating position.
Claim 13
Independent Claim
29 words
A device as claimed in any preceding claim characterised in that each of the venting means comprises a hydrophobic filter comprising an air permeable barrier of a hydrophobic material.
Claim 14
Dependent Claim
19 words
A device as claimed in claim 12 characterised in that wherein the material is ultra high molecular weight polyethylene.
Claim 15
Independent Claim
20 words
A device as claimed in any of claims 2 to 13 characterised in that the membrane is of silicone rubber.
Claim 16
Independent Claim
30 words
A device as claimed in any preceding claim characterised by including means for closing at least one of the venting means when the valve means is in the open condition.
Claim 17
Independent Claim
49 words
A device as claimed in any preceding claim characterised in that the flow path provided in an open condition of the valve means extends linearly through the device from the second connecting means to the first connecting means whereby an elongate member may extend through the chamber and cannula.
References Cited (Backward Citations)
DE3100442C1
Cited
GB2048681A
Cited
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