Patient temperature control system with fluid temperature response
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United States of America Patent
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-
Nov 16, 2004
Grant Date -
Jun 19, 2003
app pub date -
Sep 3, 2002
filing date -
Oct 11, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved patient temperature exchange system and method is disclosed for use with one or more interconnectable patient contact pads. In one embodiment, the system includes a circulating pump for drawing fluid through the interconnected pad(s) under negative pressure, and for pumping the fluid through one of more heat exchange devices into a circulating reservoir. Also included in the system is a system controller specially configured for controlling the one or more heat exchange devices. The controller is further configured to employ one or more algorithms for adding and removing heat in a predetermined manner. One algorithm may include first and second control terms which provide for a theoretical heat transfer rate as well as instructions for changing temperature in an expedient manner while reducing isolations and overshoots. The system may be further configured with at least one alternate mode of operation for affecting water temperature when one or more water temperatures are outside a predetermined range.
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Family
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