Medical fluid cassette and control system

• US 5,106,366 A
• Filed: 03/08/1990
• Issued: 04/21/1992
• Est. Priority Date: 03/08/1990
• Status: Expired due to Term

• Current Assignee: Nestle SA
• Original Assignee: Nestle SA
• Inventors: Steppe, Dennis L.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): Rafa, Michael
• Application Number:
  US07/490,438
• Time in Patent Office: 775 Days
• Field of Search: 604/27, 604/30, 604/31, 604/34-35, 604/118, 604/119, 604/153, 604/317, 604/319, 604/320, 417/475-477
• US Class Current: 604/30
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• 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 3/0201 Cassettes therefor

Abstract

There is provided a medical fluid cassette made of thermoformed plastic material which cooperates with a medical control unit having retaining structure cooperable with the cassette to assist in controlling the flow of fluid through tubing associated with the cassette.

Claims

1. A medical fluid cassette for use with a medical control unit of the type having an operable assembly for controlling fluid to and from a surgical instrument at an operative site, the control unit having a surface configured to support said cassette and a movable member having at least a relatively rigid portion selectively cooperable with said cassette when said cassette is supported on said control unit surface, said cassette comprising:

a supporting member being made of a flexible material and being sized and shaped to supportingly cooperate with the supporting surface of the control unit;

fluid circuitry means positioned to be supported by said supporting member, said circuitry means being controllable by the operable assembly for controlling fluid flow therethrough, such that when said supporting member is supported on the supporting surface, the rigid portion of the movable member forms a reaction surface in cooperating relationship with said fluid circuitry means and the operable assembly can control the flow of fluid through said circuitry means.

2. The medical cassette of claim 1 wherein said supporting member is made of a flexible thermoformed plastic material.

3. The medical cassette of claim 2 wherein said supporting member is sized and shaped to coapt with the supporting surface of the control unit.

4. The medical cassette of claim 3 further comprising holding means for releasably holding said circuitry means in predetermined orientations.

5. The medical cassette of claim 4 wherein said circuitry means comprises tubing segments having flexible occludable portions which are selectively occludable by the operation of respective assemblies of the control unit.

6. The medical cassette of claim 5 further including a sealable cover member which is sealably and removably connected to said supporting member so as to removably cover said supporting member including said tubing segments prior to use thereof.

7. The medical cassette of claim 2 wherein said supporting member has a thin-walled construction.

8. A system comprising:

a medical fluid cassette in combination with a medical control unit which controls the flow of fluid to and from a surgical instrument at an operative site,

said control unit including a vacuum assembly for aspirating body tissue and fluids from a surgical instrument at an operative site and an irrigating assembly for supplying irrigating fluid to the operative site, a supporting surface configured to support said fluid cassette assembly, and a movable retaining member having rigid means cooperable with said fluid cassette on said supporting surface;

said fluid cassette including a supporting member made of a thin-walled flexible material which is sized and shaped to cooperate with said supporting surface;

fluid irrigating and aspirating means for transporting fluids to and from the surgical instrument at the operative site;

means for holding said irrigating and aspirating means in cooperable relationship with said vacuum and irrigating assemblies of said control unit, respectively, said cassette when supported on said supporting surface by said retaining member has said rigid means providing a reaction surface so that said irrigating and aspirating assemblies cooperate with said irrigating and aspirating means such that fluid flow therethrough can be controlled by operation of said irrigating and aspirating assemblies.

9. The system of claim 8 wherein said supporting member is made of a flexible thermoformed plastic material.

10. The system of claim 9 wherein said supporting member is sized and shaped to coapt with the supporting surface of said control unit.

11. The system of claim 10 wherein said holding means releasably holds said irrigating and aspirating means in predetermined orientations.

12. The system of claim 11 wherein said irrigating and aspirating means respectively comprises irrigating and aspirating tubing segments with flexible occludable portions which are selectively occludable by the operation of respective irrigating and aspirating assemblies of said control unit.

13. The system assembly of claim 12 further including a sealable cover member which is sealably and removably connected to said supporting member so as to removably cover said supporting member including said irrigating and aspirating tubing segments prior to use thereof.

14. The system of claim 13 wherein said supporting member has a thin walled construction.

15. A medical fluid cassette for use with a medical fluid control unit of the type having a pumping assembly for aspirating fluid from a surgical instrument and an irrigating assembly for controlling flow of irrigation fluid to the surgical instrument, the control unit includes a surface configured to support said fluid cassette and a relatively movable member having rigid means selectively cooperable with said cassette when supported on the supporting surface by the movable member, said cassette comprising:

a supporting member made of a flexible and thin-walled material and being sized and shaped to cooperate with the supporting surface of the control unit;

fluid irrigating and aspirating means being flexible for allowing fluid flow therethrough to be selectively controlled;

means for orienting said irrigating and aspirating means so as to be in cooperable relationship with the pumping and irrigating assemblies of the control unit respectively, said cassette when supported on the supporting surface by the movable member has the rigid means positioned in cooperable relationship to portions of said irrigating and aspirating means so as to provide reaction surfaces for the irrigating and aspirating assemblies when cooperating with said irrigating and aspirating means to control flow of fluid through said irrigating and aspirating means.