Dialysis machine having auto-connection system with roller occluder

• US 9,931,454 B2
• Filed: 05/01/2015
• Issued: 04/03/2018
• Est. Priority Date: 11/21/2008
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.)
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Lo, Ying-Cheng, Ding, Yuanpang Samuel
• Primary Examiner(s): Bosworth, Kami A
• Assistant Examiner(s): Carpenter, William
• Application Number:
  US14/702,185
• Publication Number:
  US 20150231319A1
• Time in Patent Office: 1,068 Days
• Field of Search: 604151
• 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 set operable with the medical fluid machine;

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

a first occluder positioned to occlude the at least one medical fluid supply line while the at least one medical fluid supply line is being moved into connection with the disposable set;

a second occluder positioned to occlude the at least one medical fluid supply line while the at least one medical fluid supply line is being moved into connection with the disposable set, the second occluder located between the first occluder and the disposable set; and

wherein the first and second occluders and the mechanism are operated such that (i) only the second occluder is occluding the at least one medical fluid supply line at a first time before a cap at an end of the at least one medical fluid supply line is removed; and

(ii) only the first occluder is occluding the at least one medical fluid supply line at a second time before the cap is removed.

2. The medical fluid system of claim 1, wherein the first time occurs before the second time.

3. The medical fluid system of claim 1, wherein at least one of the first and second occluders is rotatable to occlude the at least one medical fluid supply line, while the at least one medical fluid supply line is being moved into connection with the disposable set.

4. The medical fluid system of claim 1, wherein the first time occurs while the mechanism is moved to cause the at least one medical supply line to move towards the disposable set to remove at least one cap from the disposable set.

5. The medical fluid system of claim 1, which includes a third time, between the first and second times, in which both the first and the second occluders are occluding the at least one medical fluid supply line.

6. The medical fluid system of claim 5, wherein the third time occurs when the at least one medical fluid supply line is engaged initially with at least one cap of the disposable set to thereafter remove the at least one cap from the disposable set.

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

8. The medical fluid system of claim 1, wherein the disposable set includes a rigid part.

9. The medical fluid system of claim 1, which includes a third time after the second time, in which only the second occluder is occluding the at least one medical fluid supply line after the cap of the at least one medical fluid supply line has been removed.