Aestiva/5 7900 Ventilator: Advanced Technology for Superior Anesthesia
The Aestiva/5 7900 ventilator from Datex-Ohmeda is a sophisticated medical device designed to optimize the delivery of anesthesia in clinical environments. Equipped with sensors in the breathing circuit, it allows for the control and monitoring of patient ventilation and measurement of inspired oxygen concentration. This enables the ventilator to compensate for compression losses, fresh gas contribution, valve and regulator drift, as well as minor leakages in the breathing absorber, bellows, and system.
Positive End Expiratory Pressure (PEEP) is electronically regulated, and the software maintains the set airway pressure during mechanical ventilation. Breathing patterns are controlled by user settings and microprocessor calculations, with user interface settings stored in non-volatile memory. Mechanical ventilation is initiated with the Bag/Vent switch on the breathing system.
The Aestiva/5 7900 ventilator reads the status of the Bag/Vent switch and the breathing circuit type (Circle, Bain-Mapleson D) automatically, eliminating the need for manual adjustment. It also features an operator-selectable Heliox mode, allowing for gas composition compensation when Heliox gas is used. All Aestiva/5 7900 ventilators come with minimum monitoring and alarms managed directly on the ventilator panel, ensuring secure alarm management.
The ventilator hardware is regularly monitored by software tests and includes an RS-232 serial digital communications port for connection with external devices. The exhalation valve modulates flow in pressure mode, and pressure and volume modes are operator-selectable. All pneumatic components are located on a single manifold, with exhausted drive gas and bellows pressure relief valve gases passing through the ventilator exhalation valve.
The exhalation valve block is autoclavable, and excess fresh gas released from the bellows and ventilator drive gas is transferred to the Anesthesia Gas Scavenging System (AGSS). Optimized for service with a low number of components, the Aestiva/5 7900 ventilator offers redundant airway overpressure protection linked to the Pmax setting, as well as volume over-delivery limits and protection. Proprietary hose connections and fixed manifolds ensure increased safety, while electrical power is limited to 10 VA in potentially oxygen-enriched environments, with 150 psi burst overpressure protection.