FLUID PURGE IN A MEDICAL INJECTION SYSTEM

• US 20120152391A1
• Filed: 02/28/2012
• Published: 06/21/2012
• Est. Priority Date: 06/14/2006
• Status: Active Grant

• Current Assignee: ACIST Medical Systems Incorporated (Bracco SPA)
• Original Assignee: ACIST Medical Systems Incorporated (Bracco SPA)
• Inventors: Hieb, Martin G., Mohiuddin, Khader, Nystrom, Sidney D., Wilson, Robert F.
• Granted Patent: US 8,591,477 B2
• Time in Patent Office: Days
• US Class Current: 137/843
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: Y10T 137/0419 Fluid cleaning or flushing
• CPC Class Codes: Y10T 137/7879 Resilient material valve
• CPC Class Codes: Y10T 137/788 Having expansible port

Abstract

One embodiment of the invention provides a method to purge air or liquid from a powered injection system. In this embodiment, the method includes driving a first pumping device in a first operational mode to inject an amount of a first liquid medium through disposable tubing and a disposable valve, driving the first pumping device in a second operational mode to deform the disposable valve, and driving a second pumping device to inject an amount of a second liquid medium through the disposable tubing and the deformed valve. In one embodiment, the first pumping device comprises a first syringe, the second pumping device comprises a second syringe, and the disposable valve comprises an elastomeric valve.

Claims

1-31. -31. (canceled)

32. A fluid valve assembly, comprising:

a valve holder;

an elastomeric valve;

a valve body having a longitudinal axis;

a first input port having a first input port longitudinal axis;

a second input port having a second input port longitudinal axis; and

an output port,

wherein the second input port longitudinal axis is perpendicular to the valve body longitudinal axis.

33. The fluid valve assembly of claim 32, wherein the first input port longitudinal axis is substantially tangent to the valve body.

34. The fluid valve assembly of claim 32, wherein the first input port longitudinal axis is substantially tangent to a defined area or volume within the valve body.

35. The fluid valve assembly of claim 32, wherein:

the valve holder comprises a disc holder; and

the elastomeric valve comprises an elastomeric valve disc.

36. The fluid valve assembly of claim 35, wherein the elastomeric valve disc includes a slit.

37. The fluid valve assembly of claim 36, wherein the slit comprises an angled slit.

38. The fluid valve assembly of claim 32, wherein the second input port is coupled to a valve input port.

39. The fluid valve assembly of claim 32, wherein the second input port is coupled to a pressure transducer.

40. The fluid valve assembly of claim 32, wherein:

when the elastomeric valve is in a closed state the first input port is isolated from the output port and the second input port; and

when the elastomeric valve is in an open state the second input port is isolated from the output port and from the first input port, the valve being in the open state when a fluid pressure equaling or exceeding a defined pressure is applied to the first input port and causes the valve to open.

41. The fluid valve assembly of claim 40, wherein the state of the valve disc is determined by a pressure applied to the first input port.

42. The fluid valve assembly of claim 40, wherein the defined pressure comprises a cracking pressure of the valve.

43. The fluid valve assembly of claim 42, wherein the cracking pressure is a function of at least one of physical properties of the elastomeric valve, interior dimensions of the valve holder, valve body and/or valve, or exterior dimensions of the valve holder, valve body and/or valve.

44. The fluid valve assembly of claim 32, further comprising a bi-directional check valve coupled to the second input port to protect from high pressures a pressure transducer that is also coupled to the second input port.

45. The fluid valve assembly of claim 32, further comprising a bi-directional check valve coupled to the second input port to reflect hemodynamic signals towards a pressure transducer that is also coupled to the second input port.