Multi-Vent Venturi Face Masks segmentation by application maps demand to clinical acuity tiers. Emergency & Trauma Care dominates, accounting for a 42 % share in 2023, driven by pre-hospital titration of 28–60 % FiO₂ during acute exacerbations. Post-operative Recovery contributes 25 %, where repeatable oxygen delivery reduces re-intubation risk in PACUs. Chronic COPD Management, at 21 %, favours home-use masks with colour-coded valves for self-administration, offsetting hospital re-admissions. Neonatal & Paediatric Respiratory Support, though only 8 %, commands price premiums for softer seals and 0.25–1 L/min low-flow adapters. Pulmonary Rehabilitation Clinics round out the taxonomy at 4 %, leveraging the same masks across supervised exercise sessions, creating a secondary replacement cycle every 6–9 months.