Microsurgical cassette

• US 5,364,342 A
• Filed: 10/13/1993
• Issued: 11/15/1994
• Est. Priority Date: 02/05/1992
• Status: Expired due to Term

• Current Assignee: Nestle SA
• Original Assignee: Nestle SA
• Inventors: Etherington, Roger, Beuchat, Charles E., Berkman, John W., Walbrink, Harold J.
• Primary Examiner(s): Lewis, Ralph A.
• Application Number:
  US08/135,865
• Time in Patent Office: 398 Days
• Field of Search: 604/27, 604/30, 604/31, 604/35, 604/65, 604/118, 604/119, 604/151, 604/153, 128/DIG. 12, 128/DIG. 13
• US Class Current: 604/30
• CPC Class Codes: A61F 9/00736 Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments A61F9/008 takes precedence
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 1/7411 by changing the size of a vent in combination with changing the cross-section of the line A61M1/7413
• 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 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/123 with incorporated reservoirs
• CPC Class Codes: A61M 2205/125 with incorporated filters
• CPC Class Codes: A61M 2205/128 with incorporated valves
• CPC Class Codes: A61M 2205/6081 Colour codes
• CPC Class Codes: A61M 3/0201 Cassettes therefor
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

A cassette for use in combination with a surgical handpiece and a control console for controlling irrigation and/or aspiration fluid flows in the handpiece having a housing with an external surface and an interface adapted to be held in operative association with the control console, an inlet coupling, a pump tube having an inlet and a discharge line in fluid communication with a waste container and a fluid flow passage in fluid communication with the inlet coupling and the pump inlet consisting of an open channel formed in the external surface and a gasket adhered to the external surface to seal the channel fluid-tight.

Claims

1. A cassette for use in combination with a surgical handpiece and a control console for controlling irrigation or aspiration fluid flows in the handpiece, comprising:

a) a housing having an external surface the housing adapted to be held in operative association with the control console;

b) at least one fluid coupling integrally formed in the housing;

c) a means for generating a partial vacuum through interaction with a motive force in the control console;

d) at least one fluid flow passage in the housing in fluid communication with the fluid coupling and the means for generating a partial vacuum, the fluid flow passage being formed as an open channel integrally molded into the external surface of the housing and sealed fluid tight by a gasket having an interior surface and an exterior surface, the interior surface adhered to the external surface of the housing and the exterior surface of the gasket exposed to the atmosphere external to the cassette; and

e) a valve face in the fluid flow passage, the valve face being integrally molded into the external surface of the housing and sealed by a resilient molding.

2. The cassette of claim 1 wherein the partial vacuum generating means is a peristaltic pump tube disposed on the interface wall and the motive force is a peristaltic pump roller head located in the control console.

3. The cassette of claim 1 further comprising a discharge line in fluid communication with the partial vacuum generating means on a first end and a waste container on a second end.