Figure 3.

Schematic of our data acquisition and management infrastructure. (1) Raw ventilator waveform data are sent to the RPi via serial connection. (2) Study investigator visits supervisor application, (3) chooses RPi, and selects files to extract or delete. (4) Files are extracted from the RPi and labeled with a unique patient identifier. (5) All data are then transferred using SQL and stored in a database. (6) Electronic health record and other clinical metadata are entered into the database. (7) VWD are processed using waveform analysis software to generate breath-by-breath physiologic metadata and detect relevant clinical events. (8) Time-stamped data derived from VWD processing are uploaded into the database for subsequent research and quality improvement studies.