Surgical irrigation system incorporating flow sensor device

• US 6,176,847 B1
• Filed: 05/14/1999
• Issued: 01/23/2001
• Est. Priority Date: 05/14/1999
• Status: Expired due to Term

• Current Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Original Assignee: Circon Corp. (Olympus Corporation)
• Inventors: Braganza, Austin, Humphreys, James E. Jr.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US09/312,254
• Time in Patent Office: 620 Days
• Field of Search: 604/22, 604/30, 604/31, 604/32, 604/33, 604/34, 604/35, 604/246, 604/247, 604/248, 604/249, 604/253-254, 604/255
• US Class Current: 604/246
• CPC Class Codes: A61M 2205/3355 Controlling downstream pump pressure
• CPC Class Codes: A61M 3/0208 before use
• CPC Class Codes: A61M 3/022 Volume; Flow rate
• CPC Class Codes: A61M 3/0258 by means of electric pumps

Abstract

A surgical irrigation system utilizing a flow sensor device; upon sensing fluid flow, the flow sensor device activates a fluid acceleration or pumping mechanism to pump fluid to a surgical site; the flow sensor device is capable of being conveniently located between an elevated source of fluid and a surgical handpiece; since the flow sensor device activates the pumping mechanism, the surgical handpiece is liberated from use of an electrical-type switch to activate the pumping mechanism, and, instead, is provided with a valve for mechanically starting and stopping fluid flow.

Claims

1. A surgical irrigation system comprising:

a manually moveable handpiece having an inlet and an outlet for fluid, said handpiece being adapted for use by a surgeon adjacent a fluid source located at a position spaced apart from and at a level that is higher than said handpiece;

a flexible conduit extending from said fluid source to said handpiece to allow for feed of fluid to said handpiece;

a flow sensor device supported adjacent said fluid source, said flow sensor device having an inlet port, an outlet port, fluid flow chamber, switch means sensitive to fluid flow capable of activating and deactivating a fluid accelerator in communication with the fluid source which causes increased fluid flow through said handpiece and to said surgical site; and

handpiece control means carried by said handpiece to open and close flow of said fluid from said handpiece, whereby initiation of gravity flow by said handpiece hydraulically activates said switch means associated with the fluid chamber causing said switch means to activate said accelerator to increase the fluid flow rate through said handpiece.

2. The surgical irrigation system of claim 1, wherein said handpiece is connected to a suction source.

3. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow comprises a buoyant capsule.

4. The surgical irrigation system of claim 3, wherein said switch means further comprises a Hall-Effect switching circuit.

5. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow comprises a buoyant paddle.

6. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow comprises a paddle arranged horizontally relative to said inlet port and said outlet port.

7. The surgical irrigation system of claim 1, wherein said handpiece control means comprises a valve.

8. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow is a floatable capsule to detect the flow.

9. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow is a spaced apart conductive plate.

10. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow is a submerged paddle wheel.

11. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow is a heated sensor and spaced-apart non-heated sensor.

12. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow is a pressure switch having a movable surface.

13. The surgical irrigation system of claim 1, wherein said switch means sensitive to fluid flow comprises a magnetic sensor.

14. The surgical irrigation system of claim 13, wherein said magnetic sensor comprises a magneto resistive sensor sensitive to a magnet.

20. The flow sensor device of claim 14, wherein said detection means comprises a magnetic sensor.

21. The flow sensor device of claim 20, wherein said magnetic sensor comprises a magneto resistive sensor sensitive to a magnet.

15. A flow sensor device connected to a surgical suction or irrigation system for performing suction or irrigation at an operative site in a surgical patient, comprising:

a fluid flow chamber having an inlet port connected to a fluid source and an outlet port connected to provide fluid to said operative site;

detection means in said flow chamber, said detection means being sensitive to fluid flow through said chamber; and

switch means operative in response to said detection means for activating and deactivating an accelerator to increase the flow of said fluid through said fluid flow chamber and to said surgical system.

16. The flow sensor device of claim 15, wherein said detection means comprises a buoyant capsule.

17. The flow sensor device of claim 16, wherein said detection means further comprises a Hall-Effect switching circuit.

18. The flow sensor device of claim 15, wherein said detection means comprises a buoyant paddle.

19. The flow sensor device of claim 15, wherein said detection means comprises a paddle arranged horizontally relative to said inlet port and said outlet port.