Pump shoe for use in a pumping system of a dialysis machine

• US 10,383,993 B2
• Filed: 05/05/2016
• Issued: 08/20/2019
• Est. Priority Date: 09/13/2007
• Status: Expired due to Fees

• Current Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Inventors: Fulkerson, Barry Neil, Huang, Alec, Kelly, Brian Thomas, Nolan, Tam
• Primary Examiner(s): Hansen, Kenneth J
• Application Number:
  US15/147,639
• Publication Number:
  US 20160317733A1
• Time in Patent Office: 1,202 Days
• CPC Class Codes: A61M 1/152 Details related to the interface between cassette and machine
• CPC Class Codes: A61M 1/1524 the interface providing means for actuating on functional elements of the cassette, e.g. plungers
• CPC Class Codes: A61M 1/154 with sensing means or components thereof
• CPC Class Codes: A61M 1/155 with treatment-fluid pumping means or components thereof
• CPC Class Codes: A61M 1/156 Constructional details of the cassette, e.g. specific details on material or shape
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/1609 after use, i.e. downstream of dialyser
• CPC Class Codes: A61M 1/1645 with mechanically linked peristaltic dialysis fluid pumps one upstream, the other one downstream of the dialyser
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• CPC Class Codes: A61M 1/1692 Detection of blood traces in dialysate
• CPC Class Codes: A61M 1/1694 with recirculating dialysing liquid
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: A61M 1/3434 with pre-dilution and post-dilution
• CPC Class Codes: A61M 1/3437 downstream of the filter, e.g. post-dilution with filtrate
• CPC Class Codes: A61M 1/3441 Substitution rate control as a function of the ultrafiltration rate
• CPC Class Codes: A61M 1/3451 the difference in weight between both ultra-filtrate and substitution reservoir being used as control signal
• CPC Class Codes: A61M 1/3458 having electrolytes not present in the dialysate
• CPC Class Codes: A61M 1/36222 Details related to the interface between cassette and machine
• CPC Class Codes: A61M 1/362227 the interface providing means for actuating on functional elements of the cassette, e.g. plungers
• 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 1/36226 : Constructional details of cassettes, e.g. specific details on material or shape
• CPC Class Codes: A61M 1/362265 : Details of valves
• 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 1/3646 : Expelling the residual body fluid after use, e.g. back to the body
• CPC Class Codes: A61M 1/3656 : Monitoring patency or flow at connection sites; Detecting disconnections
• CPC Class Codes: A61M 2205/126 : with incorporated membrane filters
• CPC Class Codes: A61M 2205/13 : with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/14 : Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/15 : Detection of leaks
• CPC Class Codes: A61M 2205/3368 : Temperature
• CPC Class Codes: A61M 2205/3393 : by weighing the reservoir
• CPC Class Codes: A61M 2205/3553 : remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3584 : using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/3653 : by Joule effect, i.e. electric resistance
• CPC Class Codes: A61M 5/14232 : Roller pumps
• CPC Class Codes: B01D 2313/10 : Specific supply elements
• CPC Class Codes: B01D 2313/105 : Supply manifolds
• CPC Class Codes: B01D 2313/12 : Specific discharge elements
• CPC Class Codes: B01D 2313/125 : Discharge manifolds
• CPC Class Codes: B01D 2313/221 : Heat exchangers
• CPC Class Codes: B01D 2313/243 : Pumps
• CPC Class Codes: B01D 61/30 : Accessories; Auxiliary operation
• CPC Class Codes: F04B 43/1284 : Means for pushing the backing-plate against the tubular flexible member
• CPC Class Codes: H05B 1/025 : For medical applications

Abstract

The specification discloses a portable dialysis machine having a detachable controller unit and base unit with an improved reservoir heating system. The controller unit includes a door having an interior face, a housing with a panel, where the housing and panel define a recessed region configured to receive the interior face of the door, and a manifold receiver fixedly attached to the panel. The base unit has a reservoir with an internal pan and external pan, separated by a space that holds a heating element. The heating element is electrically coupled to electrical contacts attached to the external surface of the external pan.

Claims

1. A pumping system configured for use in a dialysis machine, wherein the dialysis machine comprises a housing defining an internal space, a pump roller positioned within the internal space, a receiver within the internal space configured to receive flexible tubing and position the flexible tubing relative to the pump roller, a door configured to open and provide access to the internal space, and a pump shoe, the pump shoe comprising:

a member having a contact surface for receiving the flexible tubing, wherein the contact surface has a degree of curvature matching the curvature of the pump roller and imparting a concave shape for receiving the flexible tubing and an attachment surface opposite the contact surface configured to attach the pump shoe to a surface of the door; and

two side surfaces, opposite one another and perpendicular to the contact surface and the attachment surfaces, wherein an edge of each of the two side surfaces adjacent the contact surface extends outwardly beyond the contact surface, forming elevated side walls to contain the flexible tubing and adapted to prevent lateral movement of the flexible tubing along the contact surface during operation and wherein the contact surface is configured to receive the flexible tubing only when the door is closed.

2. The pump shoe of claim 1, wherein the side surfaces extend outwardly beyond the contact surface by 0.060 to 0.095 inches.

3. The pump shoe of claim 1, wherein the side surfaces additionally extend inwardly along the contact surface and parallel to the contact surface by 0.001 to 0.185 inches.

4. The pump shoe of claim 1 wherein at least one of the side surfaces comprises a top surface and wherein the top surface has a degree of curvature that is equal to the degree of curvature of the contact surface.

5. The pump shoe of claim 1 wherein at least one of the side surfaces comprises a top surface and wherein the top surface has a degree of curvature that is different from the degree of curvature of the contact surface.

6. The pump shoe of claim 1 wherein each of the two side surfaces is attached to the member.

7. The pump shoe of claim 1 wherein at least one of the two side surfaces is attached to the member using at least one screw and wherein the at least one screw is positioned at a base of the at least one of the two side surfaces and proximate the attachment surface.

8. The pump shoe of claim 1 wherein each of the two side surfaces is attached to the member using two screws and wherein the two screws are positioned at a base of each of the two side surfaces and proximate the attachment surface.

9. A pumping system comprising:

a housing comprising a door, wherein the door is configured to open and close to control access to an area inside the housing;

a roller having a roller surface, wherein the roller is positioned inside the housing;

a flexible tubing positioned inside the housing and proximate the roller surface; and

a pump shoe attached to the door and adapted to receive the flexible tubing and compress the flexible tubing against the roller surface only when the door is closed, wherein the pump shoe comprises;

a member having a contact surface for receiving the flexible tubing, wherein the contact surface has a degree of curvature matching the curvature of the roller surface and imparting a concave shape for receiving the flexible tubing and an attachment surface opposite the contact surface configured to attach the pump shoe to a surface; and

two side surfaces, opposite one another and perpendicular to the contact surface and the attachment surfaces, wherein an edge of each of the two side surfaces adjacent the contact surface extends outwardly beyond the contact surface, forming elevated side walls to contain the flexible tubing and adapted to prevent lateral movement of the flexible tubing along the contact surface during operation.

10. The pumping system of claim 9, wherein the roller surface has a width in a range of 0.705 inches to 0.805 inches.

11. The pumping system of claim 9, wherein the side surfaces extend outwardly beyond the contact surface by 0.060 to 0.095 inches.

12. The pumping system of claim 9, wherein the side surfaces additionally extend inwardly along the contact surface and parallel to the contact surface by 0.001 to 0.185 inches.

13. The pumping system of claim 9, wherein at least one of the side surfaces comprises a top surface and wherein the top surface has a degree of curvature that is equal to the degree of curvature of the contact surface.

14. The pumping system of claim 9, wherein at least one of the side surfaces comprises a top surface and wherein the top surface has a degree of curvature that is different from the degree of curvature of the contact surface.

15. The pumping system of claim 9, wherein each of the two side surfaces is attached to the member.

16. The pumping system of claim 9, wherein at least one of the two side surfaces is attached to the member using at least one screw and wherein the at least one screw is positioned at a base of the at least one of the two side surfaces and proximate the attachment surface.

17. The pumping system of claim 9, wherein each of the two side surfaces is attached to the member using two screws and wherein the two screws are positioned at a base of each of the two side surfaces and proximate the attachment surface.