Controlled nitric oxide dosing equipment - for respiration appts. used in adult respiratory distress syndrome treatment

摘要

Equipment for controlled NO dosing into patient respiratory air consists of a dosing unit (4) located between the respirator (1) and the NO container (3), an NO analyser (2) connected to the tubing (13) leading from the respirator (1) to the patient, and a controller (6a) connected to the analyser (2) for controlling the dosing unit (4). The novelty is that the connection line between the respirator (1) and the analyser (2) contains a dehumidifier (23) and the connection line between the analyser (2) and the dehumidifier (23) contains a measuring gas pump (20). The analyser (2) operates according to the IR absorption measurement principle or with electrochemical sensors. An NO limit value monitoring unit (18) is connected to the analyser (2) and acts on the controller (6a). Device are provided for detecting the inspiration volumetric flow of respiratory air and oxygen and the NO volumetric flow. Also provided is a regulating unit (6b) for feedback of the measured NO volumetric flow and the analysis values as regulating parameters for readjusting the dosed NO amt. USE/ADVANTAGE - Used in the treatment of adult respiratory distress syndrome. The equipment is capable of reliable long term operation and responds rapidly to unacceptable NO concn. variations in the respiratory air.