Port assembly for an integrated medication delivery system

• US 6,908,452 B2
• Filed: 09/04/2002
• Issued: 06/21/2005
• Est. Priority Date: 02/23/2001
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Stryker Instruments, A Division Of Stryker Corporation
• Inventors: Strickler, Michael, Malackowski, Donald W., Hershberger, David, Diaz, Luis A., Huyser, Richard Franklin, Toman, Jason Dee
• Primary Examiner(s): Sirmons, Kevin C.
• Application Number:
  US10/234,831
• Publication Number:
  US 20020198494A1
• Time in Patent Office: 1,021 Days
• Field of Search: 604/151, 604/30, 604/33, 604/236, 604/131, 604/67, 604/123
• US Class Current: 604/131
• CPC Class Codes: A61M 39/16 having provision for disinfection or sterilisation A61M39/143 takes precedence; methods or apparatus for disinfection or sterilisation A61L2/00
• CPC Class Codes: A61M 39/223 Multiway valves
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/1684 by detecting the amount of infusate remaining, e.g. signalling end of infusion
• CPC Class Codes: A61M 5/16854 by monitoring line pressure

Abstract

A medication delivery system delivers medication to a patient and is suitable for sterilization by a sterilization fluid. The system includes a base and a reservoir disposed about the base for storing the medication. A pump for delivering the medication to the patient is supported by the base. A port extends from the base. The port enables fluids to flow into, within, and from the medication delivery system. The Port comprises an elongated housing having a Proximate end and a distal end with a fluid chamber defined therebetween. A plurality of fluid connectors extend from the elongated housing. A plunger is disposed in the fluid chamber and defines an internal fluid bore therethrough with the internal fluid bore being in selective fluid communication with the fluid connectors as the plunger moves between an off-position, a fill-position for filling the reservoir, and a fluid delivery-position for delivering the fluid to the patient.

Claims

1. A port assembly for an integrated medication delivery system that includes a medication reservoir and a pump assembly, wherein said port assembly enables various fluids to flow into, from, and within the integrated medication delivery system, said port assembly comprising:

an elongated housing comprising a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends, said proximate end of said housing extending from the integrated medication delivery system to provide access for the fluid to flow both into and from the integrated medication delivery system;

a first fluid connector extending from said housing for allowing the fluid to flow from said fluid chamber into the pump assembly;

a second fluid connector extending from said housing for allowing the fluid to flow from the pump assembly into said fluid chamber;

a third fluid connector extending from said housing for allowing the fluid to flow between said fluid chamber and the medication reservoir;

a plunger disposed in said fluid chamber and being moveable in said fluid chamber between;

an off-position where said first, second, and third fluid connectors are isolated from said proximate end of said housing by said plunger to prevent the flow of fluid,

a fill-position where said first and third fluid connectors are in fluid communication with said proximate end of said housing thereby providing a fluid flow path between said proximate end of said housing, the medication reservoir, and the pump assembly such that the fluid can be filled through said proximate end of said housing and into the medication reservoir and the pump assembly, and

a fluid delivery-position where said first, second, and third fluid connectors are in fluid communication with said proximate end of said housing and with each other for supplying the pump assembly and for delivering the fluid to a patient;

at least one seal disposed about said plunger to segregate said fluid chamber of said housing; and

at least one leak rib extending at least partially along said interior wall of said elongated housing to selectively cause said at least one seal to leak when said plunger is in said fill-position.

2. A port assembly for enabling fluids to flow into, from, and within an integrated medication delivery system that includes a medication reservoir and a pump assembly, said port assembly comprising:

an elongated housing having a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends;

first, second, and third fluid connectors disposed on said elongated housing and extending therefrom;

a plunger disposed in said fluid chamber of said elongated housing and having an access end and an actuation end, said plunger defining an internal fluid bore therein with said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore, a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore, and a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore;

first, second, third, and fourth seats disposed about said plunger and spaced axially from one another along said plunger wherein said first seat is disposed toward said access end of said plunger, said fourth seat is disposed toward said actuation end of said plunger, and said second and third seats are disposed successively between said first and fourth seats;

a first fluid passage defined between said first and second seats and said interior wall, a second fluid passage defined between said second and third seats and said interior wall, and a third fluid passage defined between said third and fourth seats and said interior wall; and

a first seal disposed about said first seat for sealing said first fluid passage from said access end of said plunger, a second seal disposed about said second seat for sealing said first and second fluid passages from one another, a third seal disposed about said third seat for sealing said second and third fluid passages from one another, and a fourth seal disposed about said fourth seat for sealing said third fluid passage from said actuation end of said plunger.

3. A port assembly as set forth in claim 2 further comprising at least one leak rib extending along said interior wall of said elongated housing from said proximate end toward said distal end to selectively cause said first seal to leak when said plunger is in said fill-position.

4. A port assembly as set forth in claim 2 wherein said internal fluid bore extends within said plunger from said access end to said third seat and said internal fluid bore comprises a fluid duct in fluid communication with one of said fluid passages such that the fluid can flow into and from said internal fluid bore.

5. A port assembly as set forth in claim 4 wherein said fluid duct is in fluid communication with said second fluid passage defined between said second and third seats and said interior wall such that the fluid can flow into and from said internal fluid bore at said second fluid passage.

6. A port assembly as set forth in claim 5 wherein said first, second, and third fluid connectors are isolated from said proximate end of said housing and from said access end of said plunger by said first, second, and third seats when said plunger is in said off-position.

7. A port assembly as set forth in claim 5 wherein said first and third fluid connectors are in fluid communication with said proximate end of said housing and with said access end of said plunger through said second fluid passage and said fluid duct of said internal fluid bore when said plunger is in said fill-position such that the fluid can be filled through said access end of said plunger, through said internal fluid bore and said fluid duct, and into the medication reservoir and the pump assembly.

8. A port assembly as set forth in claim 7 wherein said second fluid connector is isolated from said proximate end of said housing, from said access end of said plunger, and from said first and third fluid connectors by said third and fourth seats when said plunger is in said fill-position.

9. A port assembly as set forth in claim 5 wherein said second fluid connector is in fluid communication with said proximate end of said housing and with said access end of said plunger through said second fluid passage and said fluid duct of said internal fluid bore when said plunger is in said fluid delivery-position for delivering the fluid from the pump assembly to the patient.

10. A port assembly as set forth in claim 9 wherein said first and third fluid connectors are isolated from said proximate end of said housing and said access end of said plunger by said first and second seats, but are in fluid communication with the medication reservoir through said first fluid passage when said plunger is in said fluid delivery-position for supplying the pump assembly with the fluid.

11. A port assembly as set forth in claim 2 wherein said first and third fluid connectors are aligned with said third fluid passage when said plunger is in said off-position, with said second fluid passage when said plunger is in said fill-position, and with said first fluid passage when said plunger is in said fluid delivery-position.

12. A port assembly comprising:

an elongated housing having a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends;

first, second, and third fluid connectors disposed on said elongated housing and extending therefrom;

a plunger disposed in said fluid chamber of said elongated housing and defining an internal fluid bore therein with said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore, a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore, and a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore; and

said plunger defining a fluid duct axially isolated from said fluid connectors in said off-position, axially aligned with said first and third fluid connectors in said fill-position, and axially aligned with said second fluid connector in said fluid delivery-position to provide said selective fluid communication.

13. An integrated medication delivery system for delivering medication to a patient, comprising:

a base housing;

a medication reservoir disposed about said base housing for storing the medication to be delivered to the patient;

a pump assembly supported by said base housing for delivering the medication to the patient, said pump assembly comprising a pump housing having a pump inlet and a pump outlet wherein said pump inlet and said pump outlet alternate between an open and a closed state to deliver the medication to the patient;

an elongated housing supported by said base housing and including a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends;

first, second, and third fluid connectors disposed on said elongated housing and extending therefrom;

a plunger disposed in said fluid chamber of said elongated housing and defining an internal fluid bore therein with said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore, a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore, and a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore for delivering the medication to the patient.

14. A port assembly for an integrated medication delivery system that includes a medication reservoir and a pump assembly, wherein said port assembly enables various fluids to flow into, from, and within the integrated medication delivery system, said port assembly comprising:

an elongated housing comprising a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends, said proximate end of said housing extending from the integrated medication delivery system to provide access for the fluid to flow both into and from the integrated medication delivery system;

a first fluid connector extending from said housing for allowing the fluid to flow, from said fluid chamber into the pump assembly;

a second fluid connector extending from said housing for allowing the fluid to flow from the pump assembly into said fluid chamber;

a third fluid connector extending from said housing for allowing the fluid to flow between said fluid chamber and the medication reservoir;

a plunger disposed in said fluid chamber and defining an internal fluid bore therein with said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between;

an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore to prevent the flow of fluid,

a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore thereby providing a fluid flow path between said internal fluid bore, the medication reservoir, and the pump assembly such that the fluid can be filled through said internal fluid bore and into the medication reservoir and the pump assembly, and

a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore for delivering the fluid to a patient; and

in combination with a fluid filling device that engages said proximate end of said housing to automatically move said plunger into said fill-position for filling the medication reservoir and the pump assembly.

15. A port assembly as set forth in claim 14 wherein said fluid filling device is a syringe that moves said plunger into said fill-position for filling the medication reservoir and the pump assembly.

16. A port assembly as set forth in claim 14 wherein said fluid filling device is a fluid cap that moves said plunger into said fill-position to enable a sterilization fluid to penetrate into the medication reservoir and the pump assembly.

17. A port assembly for an integrated medication delivery system that includes a medication reservoir and a pump assembly, wherein said port assembly enables various fluids to flow into, from, and within the integrated medication delivery system, said port assembly comprising:

an elongated housing comprising a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends, said proximate end of said housing extending from the integrated medication delivery system to provide access for the fluid to flow both into and from the integrated medication delivery system;

a first fluid connector extending from said housing for allowing the fluid to flow from said fluid chamber into the pump assembly;

a second fluid connector extending from said housing for allowing the fluid to flow from the pump assembly into said fluid chamber;

a third fluid connector extending from said housing for allowing the fluid to flow between said fluid chamber and the medication reservoir;

a plunger disposed in said fluid chamber and having a length, a circumference, and a plurality of seats disposed along said length and about said circumference, said seats extending outwardly from said circumference to said interior wall of said housing to define a fluid passage between each of said seats and said interior wall of said housing for controlling the flow of fluid within said port assembly;

said plunger having an access end and an actuation end and defining an internal fluid bore extending from said access end, where the fluid flows into and from said internal fluid bore, toward said actuation end, said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between;

an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore to prevent the flow of fluid,

a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore thereby providing a fluid flow path between said internal fluid bore, the medication reservoir, and the pump assembly such that the fluid can be filled through said internal fluid bore and into the medication reservoir and the pump assembly, and

a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore for delivering the fluid to a patient; and

in combination with a syringe engaging said access end of said plunger to automatically move said plunger into said fill-position for filling the medication reservoir and the pump assembly through said internal fluid bore.

18. A port assembly for an integrated medication delivery system that includes a medication reservoir and a pump assembly, wherein said port assembly enables various fluids to flow into, from, and within the integrated medication delivery system, said port assembly comprising:

an elongated housing comprising a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends, said proximate end of said housing extending from the integrated medication delivery system to provide access for the fluid to flow both into and from the integrated medication delivery system;

a first fluid connector extending from said housing for allowing the fluid to flow from said fluid chamber into the pump assembly;

a second fluid connector extending from said housing for allowing the fluid to flow from the pump assembly into said fluid chamber;

a third fluid connector extending from said housing for allowing the fluid to flow between said fluid chamber and the medication reservoir;

a plunger disposed in said fluid chamber and defining an internal fluid bore therein with said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between;

an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore to prevent the flow of fluid,

a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore thereby providing a fluid flow path between said internal fluid bore, the medication reservoir, and the pump assembly such that the fluid can be filled through said internal fluid bore and into the medication reservoir and the pump assembly, and

a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore for delivering the fluid to a patient; and

in combination with an infusion tube set comprising a fluid end and a patient end wherein said fluid end of said tube set engages said proximate end of said housing to automatically move said plunger into said fluid delivery-position for delivering the fluid to the patient.

19. A port assembly for an integrated medication delivery system that includes a medication reservoir and a pump assembly, wherein said port assembly enables various fluids to flow into, from, and within the integrated medication delivery system, said port assembly comprising:

an elongated housing comprising a proximate end, a distal end, and an interior wall defining a fluid chamber between said ends, said proximate end of said housing extending from the integrated medication delivery system to provide access for the fluid to flow both into and from the integrated medication delivery system;

a first fluid connector extending from said housing for allowing the fluid to flow from said fluid chamber into the pump assembly;

a second fluid connector extending from said housing for allowing the fluid to flow from the pump assembly into said fluid chamber;

a third fluid connector extending from said housing for allowing the fluid to flow between said fluid chamber and the medication reservoir;

a plunger disposed in said fluid chamber and having a length, a circumference, and a plurality of seats disposed along said length and about said circumference, said seats extending outwardly from said circumference to said interior wall of said housing to define a fluid passage between each of said seats and said interior wall of said housing for controlling the flow of fluid within said port assembly;

said plunger having an access end and an actuation end and defining an internal fluid bore extending from said access end, where the fluid flows into and from said internal fluid bore, toward said actuation end, said internal fluid bore being in selective fluid communication with said fluid connectors as said plunger moves in said fluid chamber between;

an off-position where said first, second, and third fluid connectors are isolated from said internal fluid bore to prevent the flow of fluid,

a fill-position where said first and third fluid connectors are in fluid communication with said internal fluid bore thereby providing a fluid flow path between said internal fluid bore, the medication reservoir, and the pump assembly such that the fluid can be filled through said internal fluid bore and into the medication reservoir and the pump assembly, and

a fluid delivery-position where said second fluid connector is in fluid communication with said internal fluid bore for delivering the fluid to a patient; and

in combination with an infusion tube set comprising a fluid end and a patient end wherein said fluid end of said tube set engages said access end of said plunger to automatically move said plunger into said fluid delivery-position for delivering the fluid to the patient.