Surgery – Respiratory method or device – Means for indicating improper condition of apparatus
Reissue Patent
2006-08-08
2006-08-08
Lewis, Aaron J. (Department: 3761)
Surgery
Respiratory method or device
Means for indicating improper condition of apparatus
C128S204210, C128S204230, C128S205230
Reissue Patent
active
RE039225
ABSTRACT:
The system and method for detecting disconnectiondelete-start id="DEL-S-00001" date="20060808" ?and occlusiondelete-end id="DEL-S-00001" ?of a tubing system of a patient ventilator detects disconnection of the tubing system, opens the exhalation valve, delivers an idle flow of breathing gas to the tubing system, disables breath triggering, and generates an alarm. A reconnection of the tubing system can also be detected, to initiate resumption of pressure supported inspiration.delete-start id="DEL-S-00002" date="20060808" ?For occlusion detection, the pressure drop in the tubing system is determined by pressure sensors in the inspiratory and expiratory airways of the tubing system. The two pressure drop values are compared, and once occlusion is detected, an alarm is generated, and the ventilator responds to protect the patient from over distension. Abatement of the occlusion can also be monitored in a pressure based occlusion status cycling mode, and the ventilator can revert back to normal ventilation when the circuit occlusion or exhaust port occlusion are not detected.delete-end id="DEL-S-00002" ?
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Doyle Peter
Isaza Fernando J.
Wong Stanley Y.
Baker & Botts L.L.P.
Lewis Aaron J.
Nellcor Puritan Bennett Incorporated
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