System and method for flow triggering of breath supported ventilation
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United States of America Patent
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Feb 21, 1995
Issued Date -
N/A
app pub date -
Dec 3, 1993
filing date -
May 11, 1990
priority date (Note) -
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Abstract
The method for flow triggering breath supported ventilation is accomplished by providing a system comprising a source of a predetermined, preinspiratory, constant flow of breathing gas and connecting such to a patient breathing attachment. One or more flow sensors measure the gas flow rate in a flow path communicating with the patient breathing attachment, determining when inhalation from the flow path has occurred. Breath support is generated in the delivered gas flow in response to inhalation by the patient, and the predetermined, preinspiratory, continuous flow of breathing gas is reestablished prior to the patient's next inspiratory effort. In combination with various types of breath support, the flow triggering strategy of the invention offers significant improvements in providing breath support to patients having weakened respiratory capabilities.
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