There is an issue with bellavista 1000 and 1000e ventilators with software version 6.0.1600.0 or higher installed and have the Data Communication port set to “HL7.»

http://www.fda.gov/medical-devices/medical-device-recalls/vyaire-medical-recalls-bellavista-1000-and-1000e-series-ventilators-due-issues-software