GB2059776A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Intravenous administration set
Assignee: EMD Millipore Corp
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Filing: 1980-09-17
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Granted: —
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Expires: 2000-09-17
Abstract
Abstract A piggyback I.V. administration set for alternatively administering to a patient a primary liquid and a secondary liquid at different pressures and flow rates, and for automatically switching between them, comprises primary tubing adapted at one end for connection to a primary liquid source, secondary tubing adapted at one end for connection to a secondary liquid source at a higher pressure head, a Y-site junction device for receiving the other ends of said tubings, outlet tubing from said junction device for conveying either liquid to the patient, check valve means in the primary liquid flow path to prevent flow of secondary liquid into the primary tubing, first adjustable flow rate control means below the junction device for controlling the higher flow rate of the secondary liquid, and second flow rate control means above the first for controlling the flow rate of the primary liquid without restricting the flow of secondary liquid. The check valve may be a hydrophilic microporous membrane. Other such membranes which may be located in the Y-junction, may be provided to protect the patient from entrained air. <IMAGE>
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 05:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1407; A61M5/1408; A61M5/36
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
153 words
A piggyback l.V. administration set for alternatively administering to a patient a primary liquid and a secondary liquid at different pressures and flow rates, and for automatically switching between them, said set comprising primary tubing adapted at one end for connection to a primary liquid source, secondary tubing adapted at one end for connection to a secondary liquid source at a higher pressure head, a Y-site junction device for receiving the other ends of said tubings, outlet tubing from said junction device for conveying either liquid to the patient, check valve means in the primary liquid flow path to prevent flow of secondary liquid into the primary tubing, first adjustable flow rate control means below the junction device for controlling the higher flow rate of the secondary liquid, and second flow rate control means above the first for controlling the flow rate of the primary liquid without restricting the flow of secondary liquid.
Claim 2
Dependent Claim
153 words
A piggyback l.V. administration set for alternatively administering to a patient a primary liquid and a secondary liquid at different pressures and flow rates, and for automatically switching between them, said set comprising primary tubing adapted at one end for connection to a primary liquid source, secondary tubing adapted at one end for connection to a secondary liquid source at a higher pressure head, a Y-site junction device for receiving the other ends of said tubings, outlet tubing from said junction device for conveying either liquid to the patient, check valve means in the primary liquid flow path to prevent flow of secondary liquid into the primary tubing, first adjustable flow rate control means below the junction device for controlling the higher flow rate of the secondary liquid, and second flow rate control means above the first for controlling the flow rate of the primary liquid without restricting the flow of secondary liquid.
Claim 3
Dependent Claim
35 words
An l.V. administration set according to claim 1 wherein said check valve means in the primary flow path is a hydrophilic microporous membrane having air downstream thereof to prevent reverse flow of secondary liquid therethrough.
Claim 4
Dependent Claim
32 words
An I.V. administration set according to claim 2 comprising further hydrophilic microporous membrane means in the secondary flow path for preventing, when met with aqueous liquid, passage of air to the patient.
Claim 5
Dependent Claim
24 words
An l.V. administration set according to claim 3 wherein said check valve means and said microporous membrane means are located in said junction device.
Claim 6
Dependent Claim
39 words
An l.V. administration set according to claim 3 or claim 4 further comprising airvents upstream of said check valve means and upstream of said membrane means for venting air to the atmosphere, said air vents comprising hydrophobic microporous
membranes.
Claim 7
Dependent Claim
24 words
An I.V. administration set according to any
preceding claim wherein said second flow rate control means is an adjustable clamp on the primary tubing.
Claim 8
Dependent Claim
34 words
An I.V. administration set according to any
preceding claim further comprising an additional
hydrophilic membrane means in the flow path of
each liquid to provide additional protection against
passage of air to the patient.
Claim 9
Independent Claim
128 words
A device for use in a piggyback l.V. administration set to permit automatic switching between primary and secondary liquids to be intermittently administered at different rates, said device comprising a first receiving chamber with an inlet for primary liquid, a second receiving chamber with an inlet for secondary liquid, a delivery chamber having a common outlet for both liquids, and an intermediate chamber between said delivery chamber and said receiving chambers, said intermediate and first receiving chambers being separated by a hydrophilic microporous membrane which when wet passes primary liquid but not air at the maximum pressure within said device, said membrane being located in the upper portion of the device in position to retain air on the downstream side thereof to prevent back-flow of secondary liquid therethrough.
Claim 10
Independent Claim
128 words
A device for use in a piggyback l.V. administration set to permit automatic switching between primary and secondary liquids to be intermittently administered at different rates, said device comprising a first receiving chamber with an inlet for primary liquid, a second receiving chamber with an inlet for secondary liquid, a delivery chamber having a common outlet for both liquids, and an intermediate chamber between said delivery chamber and said receiving chambers, said intermediate and first receiving chambers being separated by a hydrophilic microporous membrane which when wet passes primary liquid but not air at the maximum pressure within said device, said membrane being located in the upper portion of the device in position to retain air on the downstream side thereof to prevent back-flow of secondary liquid therethrough.
Claim 11
Dependent Claim
34 words
A device according to claim 8 including a further hydrophilic microporous membrane separating said intermediate chamber from at least one of said second receiving and delivery chambers, said membrane passing liquid but not air.
Claim 12
Dependent Claim
22 words
A device according to claim 8 including further hydrophilic microporous membranes separating said intermediatechamberfrom both second receiving chamber and said delivery chamber.
Claim 13
Dependent Claim
18 words
A device according to claim 9 or 10 wherein said membranes are located in substantially the same plane.
Claim 14
Dependent Claim
22 words
A piggyback l.V. administration set substantially as hereinbefore described with reference to, and as shown in, Fig. 1 of the accompanying drawings.
Claim 15
Dependent Claim
22 words
A piggyback l.V. administration set substantially as hereinbefore described with reference to, and as shown in, Fig. 1 of the accompanying drawings.
Claim 16
Independent Claim
28 words
A device for use in a piggyback I.V. administ
ration set substantially as hereinbefore described with reference to, and as shown in, Fig. 2 of the accompanying drawings.
Claim 17
Independent Claim
28 words
A device for use in a piggyback I.V. administ
ration set substantially as hereinbefore described with reference to, and as shown in, Fig. 2 of the accompanying drawings.
Claim 18
Independent Claim
27 words
A device for use in a piggyback I.V. administration set substantially as hereinbefore described with reference to, and as shown in, Fig. 2 of the accompanying drawings.
Claim 19
Independent Claim
27 words
A device for use in a piggyback I.V. administration set substantially as hereinbefore described with reference to, and as shown in, Fig. 2 of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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