Patent ID: 7040142
Filing Date: 2006-05-09
Classification: A61M,G01M

Abstract:
1. A device for detecting leaks in a blood circuit, comprising: a first leak detector that detects leaks by sensing any presence of blood outside said blood circuit, said first leak detector being located to detect leaks from a first portion of said blood circuit located remote from a patient; said outside being a non-wetted environment of said blood circuit; a second leak detector that detects leaks by sensing air infiltration into lines under negative pressure; said second leak detector being configured to detect leaks in lines connecting said patient to said first portion; a mechanism that insures that at least part of said lines are under negative pressure at least part of the time during a treatment such that a detectable air infiltration indicates a presence of a leak in said lines; an alarm device that outputs an alarm signal responsively to a detection of a leak by said first or second leak detector.