Dual flow rate intravenous administration set with single pump chamber

• US 4,451,255 A
• Filed: 05/20/1982
• Issued: 05/29/1984
• Est. Priority Date: 05/20/1982
• Status: Expired due to Fees

• Current Assignee: Abbott Laboratories
• Original Assignee: Abbott Laboratories
• Inventors: Harms, Jack L., Bujan, Albert F.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US06/379,823
• Time in Patent Office: 740 Days
• Field of Search: 604/80-86, 604/123, 604/151-153, 604/246, 604/251
• US Class Current: 604/151
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407

Abstract

A disposable intravenous administration set for use with a single pump chamber wherein a primary and secondary set are combined into a single I.V. pump set. The dual capacity set would be utilized in conjunction with an I.V. pump having a capacity for at least two distinct flow rates. The primary and secondary portions of the set are interconnected through a Y-type backcheck valve in the usual manner with the secondary source of liquid placed at a higher level than that of the primary. With the secondary set connected to a secondary source of liquid the pump will be set at a flow rate faster than that for the primary set. After the secondary source of liquid is depleted, the primary source will then be administered as the pump will automatically convert to the slower flow rate. In order to prevent the action of the pump from drawing any of the primary liquid into that of the secondary during administration of the secondary liquid, a restrictor is placed downstream of the backcheck valve or alternatively a drip chamber is utilized for the same purpose.

Claims

1. An intravenous administration set for pumping liquid from at least two separate source by means of a single pumping device comprising:

a pump chamber having inlet and outlet ports in communication with a cavity portion with means to vary the volume of said cavity to effect a flow of liquid from said inlet port and out said outlet port;

first and second lengths of flexible I.V. tubing in fluid-tight communication with said inlet and outlet ports, respectively;

means to attach an intravenous needle connected to said second length of tubing opposite said chamber;

third and fourth lengths of flexible I.V. tubing;

container connection means operatively associated with said third and fourth lengths of flexible tubing;

backcheck valve means including a valve body with interconnected fluid passage means for fluid-tight communication with said first, third and fourth lengths of flexible tubing, said valve body including liquid flow control means to selectively control the flow of liquid in said one of said third and fourth lengths of tubing in response to liquid flow in the other; and

flow restriction or interruption means defined by a body section with a flow passage operatively connected to said first length of tubing and positioned between said backcheck valve means and pump chamber to restrict or interrupt fluid flow therein,

so that when the volume of said pump chamber cavity is reduced by a pumping device, any reduction in pressure will not be transmitted through said first length of tubing to said backcheck valve means.

2. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 1 wherein said means to restrict or interrupt fluid flow is defined by means to effect a reduction in pressure in said first length of tubing.

3. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 2 wherein said means to effect a reduction in pressure is defined by a passageway having a channel with a cross section smaller than that of said first tubing.

4. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 3 wherein said passageway is provided by a length of tubing having an outside diameter of substantially the same size as the inside diameter of said first length of tubing.

5. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 3 wherein said passageway is provided by a combined tubing connector and restrictor means defined by a substantially H-shaped body in cross section with the inside dimension of the extensions of said body portion being substantially the same as the outside diameter of said first length of tubing.

6. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 2 wherein said means to effect a reduction in pressure is defined by a porous plug member having an outside diameter substantially the same as the inside diameter of said first length of tubing.

7. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 2 wherein said means to effect a reduction in pressure is defined by a filter membrane positioned in fluid flow contact with said first length of tubing.

8. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 7 wherein said filter membrane is supported by a tubular body member with the opposing ends of said body member in fluid-tight communication with said first length of tubing.

9. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 1 wherein said means to interrupt fluid flow is defined by a standard drip chamber.

10. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 1 wherein said pump chamber includes a driver element adapted to be engaged by a driver mechanism.

11. The intravenous administration set for pumping liquid from at least two separate sources by means of a single pumping device as defined in claim 1 wherein said container connection means includes a standard drip chamber.