iSAVE: A Patient-Specific Ventilation Expansion System The Individualized System for Augmenting Ventilator Efficacy (iSAVE) repurposes existing medical flow valves to allow a single ventilator to provide personalized support to at least two patients. iSAVE enables independent control of volume and pressure for each patient and incorporates safety measures to accommodate sudden patient deterioration and cross-contamination.