Method and apparatus for uninterrupted delivery of radiographic dye

• US 5,533,978 A
• Filed: 11/07/1994
• Issued: 07/09/1996
• 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): Yasko, John D.
• Assistant Examiner(s): Stright, Jr., Ronald K.
• Application Number:
  US08/336,252
• Time in Patent Office: 610 Days
• Field of Search: 604/48, 604/49, 604/65, 604/52, 604/53, 604/80-83, 604/89, 604/127, 604/122-125, 604/128, 604/181, 604/151-153, 604/183, 604/186, 604/187, 604/191, 604/212, 604/213 , 604/207, 604/215, 604/247, 604/254, 604/255-258, 604/403, 604/407, 604/408, 604/410, 604/129, 137/574, 137/578, 137/613, 137/558, 137/565, 137/568, 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 are provided. 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, with 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 first air vent in fluid flow communication with said reservoir;

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 chamber when said chamber becomes empty;

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

a disconnect fitting connected in said first conduit between said outlet of said reservoir and said inlet of said holding chamber, said disconnect fitting having an integral automatic flow stop device for automatically stopping fluid flow out of said reservoir upon disconnection of said fitting;

a first one way valve connected in said first conduit between said disconnect fitting and said inlet of said holding chamber, said first one way valve permitting flow only from said reservoir to said holding chamber;

a second air vent in fluid flow communication with said holding chamber;

a second one way valve connected in fluid flow communication with said second air vent, said second one way valve permitting flow only from said holding chamber to the atmosphere;

a fluid manifold, said manifold having an inlet and an outlet;

a second tubular conduit connecting said outlet of said holding chamber in flow communication with said inlet of said manifold; and

a fluid pumping device in fluid flow communication with said manifold for drawing fluid into said manifold through said manifold inlet, and for dispensing fluid from said manifold through said manifold outlet.

2. A fluid delivery system as claimed in claim 1, wherein said second one way valve is a high pressure crack valve.

3. A fluid delivery system as claimed in claim 1, wherein said shut off valve comprises a floating baffle mounted in said holding chamber for preventing air entrainment in the fluid, and for shutting off said chamber outlet.

4. A fluid delivery system as claimed in claim 1, further comprising a gas bubble detector mounted on said first conduit between said one way valve and said inlet of said holding chamber.

5. A fluid delivery system as claimed in claim 1, further comprising a gas bubble detector mounted on said holding chamber between said inlet and said outlet of said holding chamber.

6. A fluid delivery system as claimed in claim 1, wherein said fluid pumping device is a syringe.

7. A fluid delivery system, comprising:

a fluid reservoir, said fluid reservoir having an outlet;

a first air vent in fluid flow communication with said reservoir;

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 chamber when said chamber becomes empty;

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

a disconnect fitting connected in said first conduit between said outlet of said reservoir and said inlet of said holding chamber, said disconnect fitting having an integral automatic flow stop device for automatically stopping fluid flow out of said reservoir upon disconnection of said fitting;

a one way valve connected in said first conduit between said disconnect fitting and said inlet of said holding chamber, said one way valve permitting flow only from said reservoir to said holding chamber;

a fluid manifold, said manifold having an inlet and an outlet;

a second tubular conduit connecting said outlet of said holding chamber in flow communication with said inlet of said manifold;

a fluid pumping device in fluid flow communication with said manifold for drawing fluid into said manifold through said manifold inlet, and for dispensing fluid from said manifold through said manifold outlet;

a second air vent in fluid flow communication with said holding chamber; and

a high pressure crack valve connected in fluid flow communication with said second air vent, said high pressure crack valve permitting flow only from said holding chamber to the atmosphere.

8. A fluid delivery system as claimed in claim 7, wherein said shut off valve comprises a floating baffle mounted in said holding chamber for preventing air entrainment in the fluid, and for shutting off said chamber outlet.

9. A fluid delivery system as claimed in claim 7, further comprising a gas bubble detector mounted on said first conduit between said first one way valve and said inlet of said holding chamber.

10. A fluid delivery system as claimed in claim 7, further comprising a gas bubble detector mounted on said holding chamber between said inlet and said outlet of said holding chamber.

11. A fluid delivery system as claimed in claim 7, wherein said fluid pumping device is a syringe.

12. A fluid delivery system, comprising:

a fluid reservoir, said fluid reservoir having an outlet;

a first air vent in fluid flow communication with said reservoir;

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

a fluid baffle mounted in said holding chamber for preventing air entrainment in the fluid, and for shutting off said chamber outlet when said chamber becomes empty;

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

a disconnect fitting connected in said first conduit between said outlet of said reservoir and said inlet of said holding chamber, said disconnect fitting having an integral automatic flow stop device for automatically stopping fluid flow out of said reservoir upon disconnection of said fitting;

a one way valve connected in said first conduit between said disconnect fitting and said inlet of said holding chamber, said one way valve permitting flow only from said reservoir to said holding chamber;

a gas bubble detector mounted on said first conduit between said first one way valve and said inlet of said holding chamber;

a fluid manifold, said manifold having an inlet, an outlet, and a syringe port;

a second tubular conduit connecting said outlet of said holding chamber in flow communication with said inlet of said manifold;

a syringe connected in fluid flow communication with said syringe port for drawing fluid into said manifold through said manifold inlet, and for dispensing fluid from said manifold through said manifold outlet;

a second air vent in fluid flow communication with said holding chamber; and

a high pressure crack valve connected in fluid flow communication with said second air vent, said high pressure crack valve permitting flow only from said holding chamber to the atmosphere.

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

providing a vented radiographic dye reservoir, a deformable dye holding chamber, a first line connecting said reservoir with said chamber, an integral disconnect with flow/stop in said first line, and a one way valve in said first line between said disconnect and said chamber, said one way valve allowing flow only from said reservoir to said chamber;

providing a fluid manifold connected to an outlet of said chamber by a second line, and a syringe connected to said fluid manifold for drawing dye into said manifold and for dispensing dye from said manifold;

providing a vent line attached to said chamber, with a high pressure crack valve connected to said vent line, said high pressure crack valve allowing flow only from said chamber to the atmosphere;

squeezing said chamber to expel air from said chamber to the atmosphere through said vent line and said high pressure crack valve;

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

retracting a plunger from said syringe to draw dye from said chamber into said manifold;

inserting said plunger into said syringe to dispense dye from said manifold into a vascular system of the patient; and

disconnecting said reservoir from said chamber by parting said first line at said disconnect, said integral flow/stop automatically stopping flow of dye from said reservoir through said first line, to allow use of dye remaining in said reservoir in a subsequent injection procedure.