Dual source intravenous administration set having an intravenous pump

• US 5,032,112 A
• Filed: 11/22/1989
• Issued: 07/16/1991
• Est. Priority Date: 11/22/1989
• Status: Expired due to Term

• Current Assignee: Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Fairchild, Michael S., Matthews, Joseph B., Senninger, Mark, Scola, Roberta
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/440,528
• Time in Patent Office: 601 Days
• Field of Search: 604/80, 604/81, 604/151-153, 604/123
• US Class Current: 604/80
• CPC Class Codes: A61M 2206/22 eliminating pulsatile flows, e.g. by the provision of a dampening chamber
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066

Abstract

The present invention provides an intravenous administration set 10 having a primary container 22 and a secondary container 24, each containing fluid, and a pump 20. The primary container 22 and secondary container 24 are joined into a single flow path by a Y-site 50. A check valve 42 is provided between the primary container 22 and the Y-site 50. A fluid capacitor 60 is provided on the single flow path between the Y-site 50 and the pump 20 to repenish displaced fluid in the pump 20.

Claims

1. An intravenous administration set comprising:

means for connecting said set to a source of intravenous fluid;

a drip chamber connected to said connecting means;

a first tubing segment connected at one end to said drip chamber and at its other end to a first branch of a Y-site;

valve means associated with said first tubing segment and said Y-site for preventing flow through said first tubing segment when the pressure in said set at said Y-site is higher than the pressure in said first tubing segment, distal from said Y-site;

said Y-site having a second branch which includes means for connecting another administration set to said Y-site;

said Y-site having a third branch connected to one end of a second tubing segment;

said second tubing segment being adapted for connection at its other end to a patient'"'"'s blood vessel via a variable volume pump chamber;

said second tubing segment including a fluid reservoir segment which is adapted to receive and hold a volume of fluid which is approximately greater than the fluid capacity of the variable volume pump chamber and is available to be drawn into the variable volume pump chamber when the pump chamber is being filled, said reservoir segment having flexible walls so that said reservoir segment will contract when it is being emptied and expand when it is being filled.

2. An intravenous administration set according to claim 1 in which said second tubing segment is connected to an inlet side of a variable volume pumping chamber, and further comprising a third tubing segment attached at one end to an outlet side of said variable volume pumping chamber.

3. An intravenous administration set according to claim 2 further wherein said second branch connecting means comprises a fourth tubing segment connected at one end to said second branch of said Y-site and connected at its opposite end to a drip chamber;

means for connecting said fourth segment to a second source of intravenous fluid; and

clamping means for interrupting fluid flow in said fourth segment.

4. An intravenous administration set according to claim 1 in which said reservoir segment comprises two sheets of flexible material bonded to each other at their edges and having an inlet and an outlet to which are attached first and second portions of said second tubing segment.

5. An intravenous administration set according to claim 1 in which said reservoir segment comprises a length of expandable diameter tubing.

6. An intravenous administration set comprising:

means for connecting said set to a source of intravenous fluid;

a Y-site defining a first branch, a second branch, and a third branch, said second branch including means for connecting another administration set to said Y-site;

a first tubing segment connected at one end to said means for connecting said set to a source of intravenous fluid and at a second end to said first branch of the Y-site;

a second tubing segment connected at one end to said third branch of the Y-site and having a second end which is adapted for connection to a patient'"'"'s blood vessel via a variable volume pump diameter;

said second tubing segment including two sheets of flexible material defining edges and bounded together at the edges to define a fluid reservoir segment in fluid communication with the second tubing segment, such that said fluid reservoir receives and holds a volume of fluid that is available to be drawn into the variable volume pump chamber when the pump chamber is being filled.

7. An intravenous administration set according to claim 6 further including a drip chamber connected between said means for connecting said set to a source of intravenous fluid and said first tubing segment.

8. An intravenous administration set according to claim 6 in which said second tubing segment is connected to an inlet side of a variable volume pumping chamber, and further comprising a third tubing segment attached at one end to an outlet side of said variable volume pumping chamber.

9. An intravenous administration set according to claim 8 further wherein said second branch connecting means comprises a fourth tubing segment connected at one end to said second branch of said Y-site and connected at its opposite end to a drip chamber;

means for connecting said fourth segment to a second source of intravenous fluid; and

clamping means for interrupting fluid flow in said fourth segment.

10. An intravenous administration set according to claim 6 in which said reservoir segment has a fluid capacity that is greater than the fluid capacity of the pump chamber to which said set is adapted to be attached.

11. An intravenous administration set comprising:

means for connecting said set to a source of intravenous fluid;

a Y-site defining a first branch, a second branch, and a third branch, said second branch including means for connecting another administration set to said Y-site;

a first tubing segment connected at one end to said means for connecting said set to a source of intravenous fluid and at a second end to said first branch of the Y-site;

a second tubing segment connected at one end to said third branch of the Y-site and having a second end which is adapted for connection to a patient'"'"'s blood vessel via a variable volume pumping chamber;

said second tubing segment including a length of expandable diameter tubing which defines a fluid reservoir segment, said fluid reservoir segment having a fluid capacity that is approximately greater than the fluid capacity of the pump chamber to which said set is adapted to be attached such that said fluid reservoir receives and holds a volume of fluid that is available to be drawn into the variable volume pump chamber when the pump chamber is being filled.

12. An intravenous administration set according to claim 11 further including a drip chamber connected between said means for connecting said set to a source of intravenous fluid and said first tubing segment.

13. An intravenous administration set according to claim 11 in which said second tubing segment is connected to an inlet side of a variable volume pumping chamber, and further comprising a third tubing segment attached at one end to an outlet side of said variable volume pumping chamber.

14. An intravenous administration set according to claim 13 further wherein said second branch connecting means comprises a fourth tubing segment connected at one end to said second branch of said Y-site and connected at its opposite end to a drip chamber;

means for connecting said fourth segment to a second source of intravenous fluid; and

clamping means for interrupting fluid flow in said fourth segment.