Interventional procedure drive and control system

• US 20040059284A1
• Filed: 09/24/2002
• Published: 03/25/2004
• Est. Priority Date: 09/24/2002
• Status: Active Grant

• Current Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Original Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Inventors: Nash, John E., Heiman, Stephen, Walters, Gregory, Fatone, Pete, Barnitz, Jim
• Granted Patent: US 7,998,107 B2
• Time in Patent Office: Days
• US Class Current: 604/30
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463

Abstract

A pumping system for use in medical applications where liquids must be infused and aspirated from a mammalian patient, and whose economics are such that it is cost effective to simply dispose of it after a single use. The system features positive displacement pump(s) such as reciprocating pump(s) containing a damping mechanism to dampen out the peaks and valleys in the fluid pressure that is pumped, which is important for preventing cavitation. The system furthermore features a shut-off valve on the extraction side so that certain injected fluids such as contrast medium, are not immediately pumped out of the patient. In a preferred embodiment, the system also features means for independently controlling the fluid pressure/volume on the infusion and extraction sides, self-priming capability, a continuous fluid path, and visual air bubble detection, with viewports located at important points in the fluid path, such as at pumps and valves.

Claims

1. A pumping system for use in medical applications where liquids are infused into and aspirated from a living being, said system comprising:

(a) a means for infusing a liquid into said patient;

(b) a means for aspirating a liquid from said patient, each of said means comprising a positive displacement pump other than a peristaltic type pump, said positive displacement pump having an inlet and an outlet side, wherein at least said aspirating means comprises a shut-off valve located on the inlet side of said pump;

(c) a damper apparatus for damping the pressure variations in the pumped liquid;

(d) means for controlling said pumps; and

(e) a user interface for inputting commands to said controlling means.

2. The pumping system of claim 1, further comprising means for independently controlling the fluid pressure or volume on the infusion and extraction sides.

3. The pumping system of claim 1, wherein said system is capable of maintaining a continuous fluid path from the infusate pumping means through the patient and out to the aspirating pumping means, when said pumping means is operating as well as sitting idle.

4. The pumping system of claim 1, wherein said system is capable of self-priming.

5. The pumping system of claim 1, further comprising visual air bubble detection.

6. The pumping system of claim 5, wherein said air bubble detection comprises viewports located in the fluid path.

7. The pumping system of claim 6, wherein said viewport locations include pumps and valves.

8. The pumping system of claim 1, wherein a single pump provides both positive pressure for said infusion means, and negative pressure for said extraction means.

9. The pumping system of claim 1, wherein said infusion means and said extraction means are provided by separate pumps.

10. The pumping system of claim 1, wherein said infusion means comprises a piston pump.

11. The pumping system of claim 1, wherein said extraction means comprises a diaphragm pump.

12. The pumping system of claim 9, wherein said pumps are driven by motors, said motors comprising speed sensors.

13. The pumping system of claim 12, wherein electrical outputs from said speed sensors are used in a negative feedback loop to adjust said speed of said motors.

14. The pumping system of claim 12, wherein electrical outputs from said speed sensors are used by a control system to stop one or both of said motors if an alarm condition is sensed.

15. The pumping system of claim 1, wherein said damper apparatus is located on the extraction side of the fluid circuit.

16. The pumping system of claim 1, wherein said shut-off valve also functions as said damper apparatus.

17. The pumping system of claim 1, wherein said controlling means is readily removable from said infusing and extracting means.

18. A pumping system for use in medical applications where liquids are infused into and aspirated from a living being, said system comprising:

(a) a means for infusing a liquid into said patient;

(b) a means for aspirating a liquid from said patient, each of said means comprising a positive displacement pump other than a peristaltic type pump, said positive displacement pump having an inlet and an outlet side, wherein at least said aspirating means comprises a shut-off valve located on the inlet side of said pump; and

(c) means for controlling said pumps.

19. A pumping system for use in medical applications where liquids are infused into and aspirated from a living being, said system comprising:

(a) a means for infusing a liquid into said patient;

(b) a means for aspirating a liquid from said patient, each of said means comprising a positive displacement pump other than a peristaltic type pump;

(c) a damper apparatus for damping the pressure variations in the pumped liquid; and

(d) means for controlling said pumps.