Abstract: A system and method for determining FRC, TGV, TLC and RV includes a hand-held unit with a shutter assembly designed to minimize measured air displacement due to shuttering. Measurements of flow and pressure are used to derive the lung parameters.

Abstract: A pulmonary function testing (PFT) system includes a PFT device operable to receive a respiratory airflow from a patient through an airflow chamber; a mouthpiece coupled to the PFT device and in airflow communication with the airflow chamber, the mouthpiece including a bacterial filter and associated with a unique identifier and patient data; and a control system communicably coupled with the mouthpiece and the PFT device. The control system is configured to perform operations including interpreting at least one of the unique identifier or the patient data associated with the mouthpiece; and based on the interpretation, adjusting a status of the PFT device to determine a pulmonary function parameter.

Abstract: A method for determining a pulmonary volume change includes: receiving a respiration event from a subject in an airflow chamber; interrupting the respiration event by an occlusion of the airflow chamber initiated at a first time instant and terminated at a second time instant subsequent to the first time instant; taking a plurality of measurements of airflow rate through the airflow chamber between the second time instant and a third time instant subsequent to the second time instant; and determining a pulmonary volume change substantially equal to a reduction of a pulmonary air volume by a pulmonary response air volume and a normal air volume, wherein the pulmonary volume change is related to a change in density of air in the airflow chamber.

Abstract: An apparatus includes a mouthpiece to communicate an airflow between a user and an airflow chamber in fluid communication with the mouthpiece; an interrupter in fluid communication with the airflow chamber and adapted to initiate an occlusion event by adjusting between an open state and a closed state, such that fluid communication is at least partially prevented between the airflow chamber and ambient air during the occlusion event initiated by the interrupter; a container in fluid communication with the airflow chamber; a flow rate sensor in fluid communication with the airflow chamber and adapted to measure an airflow exchange between the airflow chamber and the container during the occlusion event; and a controller adapted to determine an instantaneous lung volume based on the measured airflow exchange between the airflow chamber and the container.

Abstract: A method for determining at least one instantaneous pulmonary measurement. The method comprises providing a plurality of instantaneous mechanical pulmonary properties of a user in at least one identified respiratory instant during at least one respiration cycle, correlating between the plurality of instantaneous mechanical pulmonary properties, and determining at least one instantaneous pulmonary measurement in at least one identified respiratory instant according to the correlation during the at least one respiration cycle.

Abstract: A system and method for determining FRC, TGV, TLC and RV includes a hand-held unit with a shutter assembly designed to minimize measured air displacement due to shuttering. Measurements of flow and pressure are used to derive the lung parameters.