Method and apparatus for uninterrupted delivery of radiographic dye

• US 5,911,708 A
• Filed: 04/08/1998
• Issued: 06/15/1999
• Est. Priority Date: 11/07/1994
• Status: Expired due to Term

• Current Assignee: Navilyst Medical Incorporated (AngioDynamics, Inc.)
• Original Assignee: Dr. Paul Teirstein
• Inventors: Teirstein, Paul S.
• Primary Examiner(s): STRIGHT, RONALD K
• Application Number:
  US09/057,378
• Time in Patent Office: 433 Days
• Field of Search: 604/30, 604/35, 604/48, 604/49, 604/118, 604/131, 604/65-67, 604/52, 604/53, 604/133, 604/80-83, 604/89, 604/122-125, 604/127-129, 604/151-153, 604/181 , 604/183, 604/186, 604/187, 604/190, 604/191, 604/207, 604/212, 604/213, 604/215, 604/247, 604/254, 604/255, 604/256-258, 604/403, 604/407, 604/409, 604/408 , 604/410, 604/140-142, 604/246, 137/574, 137/578, 137/555, 137/565, 137/568, 137/613, 137/254, 137/44, 137/54
• US Class Current: 604/183
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/1412 Burettes, measuring cylinders for laboratory use B01L3/02
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: A61M 5/40 using low-level float-valve to cut off media flow from reservoir position detection of a floating member A61M5/1685

Abstract

A method and apparatus for injecting radiographic dye during angiography. A deformable holding chamber is interposed between a contrast dye bottle and a syringe manifold. A one-way valve and an integral disconnect/flow-stop are connected between the bottle and the holding chamber. A vent is provided in the holding chamber, which can include a second one-way valve. Squeezing and releasing the deformable chamber fills the chamber from the bottle. The holding chamber contains a floating baffle which acts as a shut off valve by plugging the chamber outlet if the chamber becomes empty. The syringe is used to withdraw dye from the holding chamber. If dye remains in the bottle after performance of the procedure, the disconnect/flow-stop fitting can be disconnected, and the dye can be saved.

Claims

1. A fluid delivery system, comprising:

a fluid reservoir, said fluid reservoir having an outlet;

a deformable fluid holding chamber, said holding chamber having an inlet and an outlet;

a fluid shut off valve in said holding chamber for shutting off said outlet of said holding chamber when said holding chamber becomes empty;

a tubular conduit connecting said outlet of said reservoir in fluid flow communication with said inlet of said holding chamber;

a one way valve connected in said tubular conduit, said one way valve permitting flow only from said reservoir to said holding chamber; and

an air vent in fluid flow communication with said holding chamber.

2. A fluid delivery system as recited in claim 1, further comprising a vent valve connected in fluid flow communication with said air vent, said vent valve being capable of selectively permitting air flow from said holding chamber to the atmosphere.

3. A fluid delivery system as recited in claim 2, wherein said vent valve is a manual valve.

4. A method of injecting radiographic dye into a vascular system of a patient, said method comprising:

providing a radiographic dye reservoir, a deformable dye holding chamber connected to said dye reservoir via a one way valve, a shut off valve within said holding chamber, and a vent on said holding chamber;

squeezing said holding chamber to expel air from said holding chamber to the atmosphere through said vent;

stopping flow through said vent;

releasing said holding chamber to allow said holding chamber to expand and draw dye from said reservoir into said holding chamber through said one way valve;

withdrawing dye from said holding chamber with a syringe; and

dispensing dye from said syringe into a vascular system of a patient.

5. A method of injecting radiographic dye as recited in claim 4, further comprising:

providing a vent valve in fluid flow communication with said vent; and

stopping said flow through said vent with said vent valve.

6. A method of injecting radiographic dye as recited in claim 4, further comprising:

providing a manual vent valve in fluid flow communication with said vent; and

stopping said flow through said vent by closing said manual vent valve.