Fluid injection system

• US 3,888,239 A
• Filed: 06/21/1974
• Issued: 06/10/1975
• Est. Priority Date: 06/21/1974
• Status: Expired due to Term

• Current Assignee: Morton K. Rubinstein
• Original Assignee: Morton K. Rubinstein
• Inventors: Rubinstein, Morton K.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/481,501
• Time in Patent Office: 354 Days
• Field of Search: 128/2A,2R,2.5D,214R,214E,214F,214Z,227,229,230,218R,218A,218G,215
• US Class Current: 600/432
• CPC Class Codes: A61B 6/481 involving the use of contrast agents
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography
• CPC Class Codes: A61M 5/14216 Reciprocating piston type

Abstract

An injection system that eliminates the need for multiple syringe changes common to an angiographic or other catheterization procedure, is disclosed. The subject system includes a pair of reservoirs for respectively maintaining saline solution and contrast dye under pressure for controlled injection into a patient. The reservoirs are maintained full by automatically filled, after a predetermined time delay, whenever any amount is used. Peristaltic pumps connected to supplies of saline solution and contrast dye function to fill and refill the reservoirs.

Claims

1. An angio-graphic injection system for continuously providing to a catheter supplies of two separate fluids used in the performance of a catheterization procedure, the injection system comprising:

a pair of reservoir means for containing a ready supply of said two fluids, respectively;

a pair of pressurizing means each connected to one of said pair of reservoir means for maintaining said fluids contained therein under a predetermined pressure;

a pair of pumping means respectively connected to one of said reservoir means for pumping fluid into said reservoir means from a source thereof to continuously maintain said reservoir means in a filled condition; and

fluid conduit means for interconnecting said respective reservoir means and pump means, said fluid conduit means provided with means for being connected to a catheter to supply said fluids thereto.

2. The injection system defined by claim 1, further including a pair of pump actuating means each connected to be respectively responsive to a different one of said reservoir means being in an unfilled condition for causing a pumping means to be energized to pump fluid to said reservoir means until obtaining a filled condition.

3. The injection system defined by cLaim 2, said pump actuating means including time delay means for delaying energization of said pumping means by a predetermined period of time following said reservoir means having an unfilled condition.

4. The injection system defined by claim 1, further including vacuum means adapted to be connected to a container for receiving waste fluids for reducing the interior pressure of said container.

5. The injection system defined by claim 1, further including valve control means connected to said pair of reservoir means for controlling the withdrawal of said fluids from both said reservoir means.

6. The injection system defined by claim 1, said pair of reservoir means each including:

a housing defining an interior cavity;

a plunger adapted to be inserted into and retracted from said interior cavity; and

inlet means extending through said housing into said cavity whereby said fluid is injected into and ejected from said interior cavity through said inlet means.

7. The injection system defined by claim 1, said pair of reservoir means each including a syringe having an inlet needle thereof connected to have fluid ejected therethrough and pumped therethrough by said pumping means.

8. The injection system defined by claim 1, said pair of pumping means each including a peristaltic pump.

9. The injection system defined by claim 1, said pair of pressurizing means each including spring biased means for applying a mechanical force to said reservoir means corresponding thereto to have fluid contained by said reservoir means maintained at a predetermined pressure in said reservoir.

10. The injection system defined by claim 9, said spring biased means including:

a telescoping member;

a spring positioned to apply a mechanical force to said telescoping member; and

means for adjustably compressing said spring to adjust said mechanical force applied to said telescoping member in accordance with said determined pressure.

11. The injection system defined by claim 2, each of said pump actuating means including:

switching means responsive to a corresponding one of said reservoir means being in an unfilled condition for causing electrical energy to be applied to a corresponding one of said pumping means; and

time delay means connected to said switching means for delaying energization of said pumping means by a predetermined period of time following said reservoir means having an unfilled condition.

12. The injection system defined by claim 6, said pair of pressurizing means each including spring biased means for applying a force to said plunger at a corresponding one of said reservoir means to have fluid contained in said interior cavity maintained at a predetermined pressure.

13. The injection system defined by claim 12, said spring biased means including:

a telescoping member;

a spring positioned to apply a mechanical force to said telescoping member; and

means for adjustably compressing said spring to adjust said mechanical force applied to said telescoping member in accordance with said determined pressure.

14. The injection system defined by claim 13, further including a pair of pump actuating means each connected to be respectively responsive to a different one of said reservoir means being in an unfilled condition for causing a pumping means to be energized to pump fluid to said reservoir means until obtaining a filled condition.

15. The injection system defined by claim 14, each of said pump actuating means including:

switching means responsive to a corresponding one of said reservoir means being in an unfilled condition for causing electrical energy to be applied to a corresponding one of said pumping means; and

time delay means connected to said switching means for delaying energization of said pumping means by a predetermined period of time following said reservoir means having an unfilled condition.

16. The injection system defined by claim 15, further including valve control meAns connected to said pair of reservoir means for controlling the withdrawal of said fluids from both said reservoir means.

17. The injection system defined by claim 16, further including vacuum means adapted to be connected to a container for receiving waste fluids for reducing the interior pressure of said container.

18. The injection system defined by claim 17, said pair of pumping means each including a peristaltic pump.

19. The injection system defined by claim 6 further including indicator means for providing an indication of the volume of each dose of fluid ejected from said reservoir means, said indicator means being positioned to respond to movement of said plunger of said reservoir means.

20. The injection system defined by claim 6, further including mounting means for removably securing each of said reservoir means whereby said reservoir means are each adapted to be removable and disposable.

21. The injection system defined by claim 18, said two fluids including saline solution and radio-opaque dyes.