Apparatus for sequential infusion of medical solutions

• US 4,608,042 A
• Filed: 09/25/1985
• Issued: 08/26/1986
• Est. Priority Date: 09/25/1985
• Status: Expired due to Fees

• Current Assignee: ALARIS Medical Systems, Inc. (Becton, Dickinson & Co)
• Original Assignee: Warner-Lambert Company (Pfizer Inc.)
• Inventors: Vanderveen, Timothy W., Tseo, Gus
• Primary Examiner(s): Pellegrino, Stephen C.
• Application Number:
  US06/779,897
• Time in Patent Office: 335 Days
• Field of Search: 604/81, 604/135-139, 604/157, 128/DIG. 12, 128/DIG.13
• US Class Current: 604/81
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 5/1408 in parallel, e.g. manifolds, sequencing valves access sites A61M39/02; tube connectors A61M39/10
• CPC Class Codes: A61M 5/1454 spring-actuated, e.g. by a clockwork
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

A system for the sequential infusion of medical solutions comprises a fluid source connected in fluid communication to a fluid flow device and having in the fluid line downstream from the fluid source a one-way check valve and a fluid access port. A spring activated syringe is connected into fluid communication with the access port to raise hydrostatic pressure downstream from the one-way check valve to prevent fluid flow therethrough during infusion by the fluid flow device of fluid from the syringe.

Claims

1. An apparatus for the sequential infusion of I.V. fluids to a patient comprising:

a fluid source;

a fluid flow device;

an I.V. tubing set connecting said fluid source in fluid communication with said fluid flow device, said tubing set comprising in sequence, downstream from said fluid source, a one-way check valve and a fluid access port;

means on said fluid flow device to control the rate of fluid flow therethrough;

a pre-filled syringe, having a fluid chamber and a Plunger slidably positioned therein, connectable in fluid communication with said access port; and

an activation means comprising;

a case;

a shuttle slidably mounted on said case for movement between a first position and a second position;

a drive shaft having a depressor affixed thereto;

a normally relaxed spring connecting said drive shaft to said shuttle;

clips attached to said case for mounting said syringe on said case to position said depressor against said plunger and establish said shuttle in the first position; and

a handle fixedly mounted on said shuttle for moving said shuttle from the first position into the second position to extend said spring for urging said depressor against said plunger to dispense fluid from said chamber of said syringe and sufficiently raise the hydrostatic pressure downstream from said one-way check valve to prevent fluid flow therethrough when said syringe is engaged with said access port for the infusion of fluid from said syringe by said fluid flow device to the patient.

2. An apparatus as cited in claim 1 wherein said spring is a negator spring.

3. An apparatus as cited in claim 1 wherein said fluid flow device is a pump.

4. An apparatus as cited in claim 1 wherein said fluid flow device is a controller.

5. An apparatus as cited in claim 1 further comprises a clamping device operatively engageable with said tubing set downstream from said access port to prevent fluid flow therethrough.

6. A syringe activation device, for use with a volumetric infusion pump to sequentially dispense I.V. fluids to a patient from a pre-filled syringe having a plunger handle and from a fluid source, which comprises:

a case;

a shuttle;

a drive shaft having a depressor affixed thereto;

a spring means connecting said drive shaft to said shuttle;

means for mounting said pre-filled syringe on said case;

means for slidably mounting said shuttle on said case for reciprocal movement between a first position wherein said spring means is relaxed and said depressor is positioned against said plunger handle, and a second position wherein said spring means is extended to urge said depressor against said plunger handle for dispensing fluid from said syringe;

means for locking said shuttle in said second position;

means for connecting said syringe in fluid communication with said pump; and

means for preventing fluid flow from said fluid source when said syringe is dispensing fluid to said pump.

7. A syringe activation device as recited in claim 6 wherein said spring means is a negator spring.

8. A syringe activation device as recited in claim 7 wherein said fluid flow prevention means is a one-way check valve.

9. A method for sequentially administering medical fluids from a syringe with a plunger and from a fluid source which comprises the steps of:

a. engaging said syringe with a syringe activation device which comprises;

a case;

a shuttle slidably mounted on said case for movement btween a first position and a second position;

a drive shaft having a depressor affixed thereto;

a normally relaxed spring connecting said drive shaft to said shuttle;

clips attached to said case for mounting said syringe thereon to position said depressor against said plunger and establish said shuttle in the first position; and

a handle fixedly mounted on said shuttle for moving said shuttle from the first position into the second position to extend said spring for urging said depressor against said plunger to dispense fluid from said chamber of said syringe;

b. establishing an I.V. administration system comprising;

a fluid source;

a fluid flow device;

an I.V. tubing set connecting said fluid source in fluid communication with said fluid flow device for infusing fluid from said fluid source to the patient, said tubing set comprising in sequence, downstream from said fluid source, a one-way check valve and a fluid access port;

means on said fluid flow device to control the rate of fluid flow therethrough; and

c. connecting said combination of said syringe and said syringe activation device in fluid communication with said I.V. administration system at said access port to sufficiently raise the hydrostatic pressure downstream from said one-way check valve to prevent fluid flow therethrough when said syringe is engaged with said access port for the infusion of fluid from said syringe by said fluid flow device to the patient.