Dialysis machine having auto-connection system with roller occluder

• US 9,044,544 B2
• Filed: 11/21/2008
• Issued: 06/02/2015
• Est. Priority Date: 11/21/2008
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Lo, Ying-Cheng, Ding, Yuanpang Samuel
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Thomas, Jr., Bradley G
• Application Number:
  US12/275,982
• Publication Number:
  US 20100130920A1
• Time in Patent Office: 2,384 Days
• Field of Search: 604/151, 604/132, 604/29, 604/34, 604/30, 604/131, 417/477.2, 417/360, 2851241-1245, 285 19- 20, 285/24, 285/25, 285 27- 29, 285/920
• US Class Current: 1/1
• CPC Class Codes: A61M 1/15 with a cassette forming partially or totally the flow circuit for the treating fluid, e.g. the dialysate fluid circuit or the treating gas circuit
• 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 1/155 with treatment-fluid pumping means or components thereof
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 2205/10 with powered movement mechanisms
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/121 interface between cassette and base
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• CPC Class Codes: A61M 39/20 Closure caps or plugs for connectors or open ends of tubes

Abstract

A medical fluid or dialysis system includes an auto-connection mechanism that connects connectors from the supply bags to dialysis cassette ports or cassette supply lines. The system provides for multiple, e.g., four, supply bags, which can be connected to a manifold of the auto-connection mechanism. Tip protecting caps that protect the supply line ends and cassette ports or cassette supply line ends are made to be compatible with the auto-connection mechanism. The auto-connection mechanism removes all the caps and connects the supply lines to the cassette. At least one roller occluder is provided that occludes the supply tubing prior to the tip protecting caps being removed. The roller occludes prevent medical dialysis fluid from spilling out of the supply lines between the time that the caps are removed and connection to the cassette is made.

Claims

1. A medical fluid system comprising:

a medical fluid machine;

a disposable pumping cassette operable with the medical fluid machine;

at least one medical fluid supply line configured to be attached to the disposable pumping cassette;

a mechanism operable to move the at least one medical fluid supply line into connection with the disposable pumping cassette to allow fluid communication between the at least one medical fluid supply line and the disposable pumping cassette; and

an occluder positioned to occlude the at least one supply line while the at least one supply line is being moved into fluid communication with the disposable pumping cassette, so as to prevent medical fluid from spilling out of the at least one supply line, the occluder including at least one rotatable member that allows the at least one supply line to be moved while occluded.

2. The medical fluid system of claim 1, wherein the mechanism and the occluder are provided as part of the medical fluid machine.

3. The medical fluid system of claim 1, wherein the occluder includes a plurality of rotatable members.

4. The medical fluid system of claim 1, wherein the occluder is rotatable about an axis that is at least substantially perpendicular to a direction of movement of the mechanism and the at least one supply line.

5. The medical fluid system of claim 1, the occluder including at least one bearing enabling rotation of the occluder.

6. The medical fluid system of claim 1, the occluder including one of:

(i) a tube that rotates about a stationary portion of the occluder, the tube contacting the at least one supply line while the at least one supply line is being moved into fluid communication with the disposable pumping cassette; and

(ii) a plurality of occluding wheels that each rotate about a stationary portion of the occluder, each occluding wheel contacting one of the supply lines while the supply line is being moved into fluid communication with the disposable pumping cassette.

7. The medical fluid system of claim 1, which includes an actuator positioned and arranged to cause the occluder to occlude the at least one supply line.

8. The medical fluid system of claim 7, the actuator further operable to release the occluder from the at least one supply line.

9. The medical fluid system of claim 1, wherein the occluder is mechanically biased to occlude the at least one supply line and actuated to remove the mechanical bias to release the occluder from the at least one supply line.

10. The medical fluid system of claim 1, wherein the occluder is a first occluder and which includes a second occluder positioned adjacent the first occluder, the first and second occluders cooperating to prevent medical fluid from spilling out of the at least one supply line.

11. A medical fluid system comprising:

a medical fluid machine;

a disposable pumping cassette operable with the medical fluid machine;

a plurality of medical fluid supply lines configured to be attached to the disposable pumping cassette;

a mechanism operable to move the plurality of medical fluid supply lines into connection with the disposable pumping cassette to allow fluid communication between the plurality of medical fluid supply lines and the disposable pumping cassette; and

a plurality of occluding wheels each positioned to occlude one of the supply lines while the supply line is being moved into fluid communication with the disposable pumping cassette, so as to prevent medical fluid from spilling out of the supply line, the occluder wheels rotatable to allow the supply lines to be moved while occluded.