Lumis™ 150 VPAP ST Non- Invasive Ventilator Lumis 150 ST is a non invasive ventilator designed for non dependent patients with respiratory insufficiency. Featuring ResMed's unique volume assurance mode - iVAPS (intelligent Volume Assured Pressure Support) - Lumis 150 VPAP ST maintains target alveolar ventilation to suit each patient's changing needs. Optional AutoEPAP ensures adequate EPAP is delivered to maintain an open upper airway - automatically, while an intelligent Backup Rate (iBR) encourages spontaneous breathing. Lumis 150 ST is also easy to set up and use.