Fluid pumping assembly including a prepackaged fluid circuit module

• US 4,526,515 A
• Filed: 09/27/1982
• Issued: 07/02/1985
• Est. Priority Date: 12/06/1979
• Status: Expired due to Fees

• Current Assignee: Baxter Travenol Laboratories Incorporated
• Original Assignee: Baxter Travenol Laboratories Incorporated
• Inventors: DeVries, James H.
• Primary Examiner(s): Gluck, Richard E.
• Application Number:
  US06/424,819
• Time in Patent Office: 1,009 Days
• Field of Search: 417/475, 417/476, 417/477, 417/474, 417/63, 604/4, 604/5, 604/6, 604/65, 604/153
• US Class Current: 417/63
• CPC Class Codes: A61M 1/36224 with sensing means or components thereof
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/362262 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/362264 the filter being a blood filter
• CPC Class Codes: A61M 1/3639 Blood pressure control, pressure transducers specially adapted therefor
• CPC Class Codes: A61M 1/3641 Pressure isolators
• CPC Class Codes: A61M 1/3693 using separation based on different densities of components, e.g. centrifuging
• CPC Class Codes: A61M 1/3696 with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/125 with incorporated filters
• CPC Class Codes: A61M 2205/331 used as turbidity change detectors, e.g. for priming-blood or plasma-hemoglubine-interface detection

Abstract

A fluid pumping assembly includes a prepackaged, self-contained fluid circuit module which is selectively movable by an operator into and out of operative association with one or more pump rotors of an associated apparatus. The module includes a housing which supports two or more flexible conduits, which together define a prearranged fluid circuit. Portions of the flexible fluid conduits are outwardly disposed from the housing in upright, freestanding positions, even when the module is out of operative association with the pump rotors. The upright portions are purposely arranged relative to each other to facilitate only a particular operative relationship between the fluid circuit and the pump rotors when the module is subsequently moved into operative association therewith.

Claims

1. A fluid pumping assembly comprising

an apparatus including at last two spaced apart pump rotors, and

a prepackaged, self-contained fluid circuit module including

housing means including means for removably positioning said housing means on said apparatus in a predetermined relationship with respect to said pump rotors,

flexible first conduit means extending through said housing means and defining a fluid pathway adapted for communication with a source of fluid, said first conduit means including a portion extending from and into said housing means to form a loop portion exterior of said housing means and disposed to interfit with a selected one of said pump rotors when said housing means is positioned in said predetermined relationship therewith, and

flexible second conduit means extending through said housing means and defining a fluid pathway adapted for communication with a source of fluid, said second conduit means including a portion extending from and into said housing means to form a loop portion exterior of said housing means and disposed to interfit with the other one of said pump rotors when said housing means is positioned in said predetermined relationship therewith,

whereby it is assured that each of said first and second conduit means will interfit only with the correct one of said pump rotors when said fluid circuit module is positioned on said apparatus.

2. A fluid pumping assembly according to claim 1

wherein said fluid circuit module further includes flexible first auxiliary conduit means extending through said housing means and defining a fluid pathway adapted for communication with a source of fluid, said first auxiliary conduit means including a portion extending from and into said housing means to form a loop portion exterior of said housing means and adjacently disposed concentrically with said loop portion of said first conduit means to interfit with said one peristaltic pump rotor.

4. A fluid pumping assembly according to claim 1 or 2 or 3

wherein each of said loop portions is resiliently biased toward an upright freestanding position when said module is out of association with said apparatus to accommodate said interfit with said respective pump rotor.

5. A fluid pumping assembly according to claim 1 or 2

wherein said apparatus further includes sensing means positioned adjacent to said pump rotors, and

wherein said fluid circuit module includes at least one monitoring device carried by said housing means in flow communication with at least one of said conduit means, and

wherein said housing positioning means is further operative for positioning said housing means on said apparatus with said monitoring device in operative contact with said sensing means.

6. A fluid pumping assembly according to claim 5

wherein each of said loop portions is resiliently biased toward an upright freestanding position when said module is out of association with said apparatus to accommodate said interfit with said respective pump rotor.

7. A fluid pumping assembly according to claim 1 or 2

wherein said fluid circuit module includes at least one container integrally joined in flow communication with at least one of said conduit means, said container thereby forming an integral part of said module.

8. A fluid pumping assembly according to claim 7

wherein said container includes a sealed container of fluid comprising the source of fluid for said conduit means integrally joined thereto.

9. A fluid pumping assembly according to claim 7

wherein said apparatus further includes sensing means positioned adjacent to said pump rotors, and

wherein said fluid circuit module includes at least one monitoring device carried by said housing means in flow communication with at least one of said conduit means, and

wherein said housing positioning means is further operative for positioning said housing means on said apparatus with said monitoring device in operative contact with said sensing means.

10. A fluid pumping assembly according to claim 7

wherein each of said loop portions is resiliently biased toward an upright freestanding position when said module is out of association with said apparatus to accommodate said interfit with said respective pump rotor.

3. A fluid pumping assembly comprising

an apparatus including at least one pump rotor,

a prepackaged, self-contained fluid circuit module including

housing means including means for removably positioning said housing means on said apparatus in a predetermined relationship with respect to said peristaltic pump rotor,

flexible first conduit means extending through said housing means and defining a fluid pathway adapted for communication with a source of fluid, said first conduit means including a portion extending from and into said housing means to form a loop portion exterior of said housing means and disposed to interfit with said pump rotor when said housing means is positioned in said predetermined relationship therewith, and

flexible first auxiliary conduit means extending through said housing means and defining a fluid pathway adapted for communication with a source of fluid, said first auxiliary conduit means including a portion extending from and into said housing means to form a loop portion exterior of said housing means and adjacently disposed concentrically with said loop portion of said first conduit means to also interfit with said pump rotor when said first conduit means is interfitted therewith,

whereby it is assured that each of said first and first auxiliary conduit means will simultaneously interfit with said pump rotor when said fluid circuit module is positioned on said apparatus.

11. A fluid pumping assembly according to claim 3

wherein said apparatus further includes sensing means positioned adjacently to said pump rotor, and

wherein said fluid circuit module includes at least one monitoring device carried by said housing means in flow communication with at least one of said conduit means, and

wherein said housing positioning means is further operative for positioning said housing means on said apparatus with said monitoring device in operative contact with said sensing means.

12. A fluid pumping assembly according to claim 3 or 11

14. A fluid pumping assembly according to claim 12

wherein said container includes a sealed container of fluid comprising the source of fluid for said conduit means integrally joined thereto.

15. A fluid pumping assembly according to claim 12

wherein each of said loop portions is resiliently biased toward an upright freestanding position when said module is out of association with said apparatus to accommodate said interfit with said respective pump rotor.

13. wherein said fluid circuit module includes at least one container integrally joined in flow communication with at least one of said conduit means, said container thereby forming an integral part of said module.