Dual diameter arthroscopic irrigation/aspiration peristaltic pump system

• US 20080154182A1
• Filed: 12/20/2006
• Published: 06/26/2008
• Est. Priority Date: 12/20/2006
• Status: Abandoned Application

• Current Assignee: Linvatec Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: Linvatec Corporation (Jefferies Financial Group, Inc.)
• Inventors: Sudduth, Richard K., Martin, Robert, Monty, John
• Application Number:
  US11/642,228
• Publication Number:
  US 20080154182A1
• Time in Patent Office: Days
• US Class Current: 604/27
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2017/00482 with a code
• CPC Class Codes: A61B 90/98 using electromagnetic means, e.g. transponders
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• 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
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/6081 Colour codes
• CPC Class Codes: A61M 3/0201 Cassettes therefor

Abstract

A dual pump irrigation/aspiration pump system capable of operating in a plurality of different modes suitable for a variety of different endoscopic surgical procedures. The system monitors actual or calculated intra-articular pressure and adjusts flow to maintain surgeon requested pressure at the surgical site while controlling outflow. The irrigation/aspiration pump system has an inflow pump and tubing dedicated to communicating fluid to the surgical work site and an outflow pump and tubing dedicated to removing fluid from the work site at a controlled rate. The system further has different size inflow and outflow pumps and tubing cassettes, means for altering the outflow fluid flow rate to accommodate a surgical tool and a means for declogging the surgical tool in the event of blockage. In a preferred embodiment a pressure control system provides inferred pressure information representative of the pressure at the work site.

Claims

1. A fluid pump system for supplying fluid to and removing fluid from a surgical site comprising:

a first peristaltic pump for supplying fluid, said first peristaltic pump having a roller assembly of a first predetermined diameter; and

a second peristaltic pump for removing fluid, said second peristaltic pump having a roller assembly of a second predetermined diameter, said second predetermined diameter not equal to said first predetermined diameter.

2. A fluid pump system according to claim 1 further comprising a tubing set comprising:

a first cassette holding a first predetermined roller tube portion in a predetermined shape of a first open loop adapted to operatively engage said roller assembly of said first peristaltic pump; and

a second cassette holding a second predetermined roller tube portion in a predetermined shape of a second open loop adapted to operatively engage said roller assembly of said second peristaltic pump.

3. A fluid pump system according to claim 2 wherein, said first roller tube has a first tube length which will engage said first roller assembly with a predetermined tension such that, when properly installed on said first peristaltic pump, said first roller tube will enable it to operate properly on said first roller, which first length will not enable said first roller tube to properly engage said second roller assembly.

4. A fluid pump system according to claim 2 wherein, said second roller tube has a second tube length which will engage said second roller assembly with a predetermined tension such that, when properly installed on said second peristaltic pump, said second roller tube will enable it to operate properly on said second roller, which second length will not enable said second roller tube to properly engage said first roller assembly.

5. A fluid pump system according to claim 3 wherein each of said tubes, when properly installed at a cassette receiving station adjacent a respective pump, has a ratio of tube length to loop length in the range of 1.7 to 2.1.