This item requires and Rx or Professional License The Drive DeVilbiss SmartDose® Evolution™ Electronic Oxygen Conserver (Model OM-975) is a highly efficient, breath-responsive gas management system engineered to maximize compressed cylinder runtime while providing dynamic, adaptive respiratory support. This advanced ambulatory accessory represents a strategic hybrid of two industry-leading technologies: it blends the highly responsive, auto-titrating electronic architecture of the SmartDose® platform with the proven, rugged mechanical durability of the CHAD® Evolution series. Weighing just 14.4 ounces (408 grams), the OM-975 completely eliminates the need for manual flow-setting changes when transitioning from resting to active states. Its integrated micro-processor continuously registers a patient's breathing frequency, accommodating respiratory triggers from 14 to 40 breaths per minute. When physical activity increases, the machine automatically scales up the oxygen bolus size to ensure adequate saturation; when activity declines, it seamlessly steps the dosage back down to baseline. This intelligent delivery logic achieves an outstanding 5:1 oxygen-saving ratio compared to traditional continuous-flow regulators, drastically extending portable tank longevity and fostering complete ambulatory independence. Design & Functional Features Adaptive Variable Bolus Delivery: Utilizes breath-responsive software to auto-adjust pulse volumes in real time based on active physical exertion, removing user guesswork. Ultra-Sensitive Micro-Triggering: Engineered to accurately detect both powerful, rapid respiratory cycles and weak, shallow inhalations (shallow breathers) with exceptional pneumatic fidelity. Intelligent Battery Preservation: Runs cleanly for up to 1 to 2 years on two standard AA alkaline batteries, utilizing an integrated auto-shutoff mechanism that places the micro-valves in a sleep state if no breath is registered for a prolonged window. Expanded Flow Spectrum (1–7 Pulse): Offers an industry-leading selection of 7 distinct pulse dose settings alongside a fixed continuous flow safety override. Product Specifications & Identification Parameter Specification Details Brand / Master Vendor Drive DeVilbiss Healthcare (CHAD Therapeutics) Model Number / SKU / MPN OM-975 UPC / GTIN / Barcode 50822383024870 HCPCS Billing Code A4618 (Oxygen accessory - conserving device) Cylinder Connection Type CGA 870 (Standard post-valve yoke connection) Pulse Flow Settings Window Settings 1, 2, 3, 4, 5, 6, and 7 Continuous Flow Override Hard-coded mechanical preset at 2.0 LPM Operating Input Pressure 500 to 3,000 PSIG (Compatible with HomeFill and standard tanks) Total Net Hardware Weight 14.4 oz (0.90 lbs) with power cells removed Physical Dimensions 6.5" L x 3.3" W x 4.0" H Power Plant Assembly 2 Standard "AA" 1.5V Alkaline Batteries Compliance & Tax Tier FDA Class II Medical Device / Prescription Required / FSA & HSA Eligible Important Product Characteristics The "Uniform Pulse" Advantage: Unlike lesser competitive conservers that cut down individual bolus volumes as your respiratory rate spikes, the OM-975 maintains a strict uniform pulse volume all the way up to 40 breaths per minute. This guarantees a higher fractional volume of pure oxygen per minute when a patient is working hard or panicking. Integrated Mechanical Controls: Features a clear, high-visibility analog contents gauge that reads cylinder pressure from 0 to 3,000 PSI at all times, independent of battery power. Application Notice: The SmartDose® Evolution™ is a restricted, prescription-regulated medical device. It must be configured strictly to the clinical parameters authorized by a licensed healthcare provider. It is built exclusively for single-lumen nasal cannulas and must never be exposed to open oils or heavy greases. Frequently Asked Questions (FAQ) Do I need an official prescription to purchase the SmartDose® Evolution™? Yes. Because this device connects directly to compressed high-pressure gas cylinders to meter and titrate a federally regulated drug (medical oxygen), the FDA classifies it as a Class II Prescription Medical Device. If you list this on your e-commerce storefront, you must place all transactions on an administrative compliance hold until a valid physician's prescription is submitted and verified. How exactly does the hybrid "SmartDose & Evolution" technology benefit me? Historically, you had to choose between the durable, long battery-life build of the CHAD® Evolution or the smart, automatic bolus-shifting software of a SmartDose unit. The OM-975 combines both worlds. You get a rugged, impact-resistant frame that squeezes up to two years of life out of simple AA batteries while gaining a machine that automatically turns your oxygen up when you walk and down when you rest. What happens if the internal AA batteries completely die while I am away from home? The OM-975 features a critical integrated mechanical safety loop. If your batteries drain completely or the electronic processor encounters an error, you can instantly turn the top rotary dial to the "CF" (Continuous Flow) position. This activates a purely mechanical override valve that bypasses the computer entirely, delivering a reliable, constant stream of oxygen at 2 Liters Per Minute (LPM) until you can swap in fresh batteries. Can I use this conserver with a HomeFill oxygen cylinder system? Yes, absolutely. The internal valve seals and high-pressure ports within the OM-975 are engineered to sustain continuous operational pressure ceilings up to 3,000 PSI. This makes it perfectly compatible with high-pressure home-filling tank equipment as well as standard pre-filled medical cylinders (M6, M9, D, or E tanks) featuring a standard CGA 870 post-valve. Compliance Standard: FDA Class II Medical Device Regulations (21 CFR Part 807) To ensure strict compliance with current Food and Drug Administration (FDA) regulations, EnhDme enforces a rigorous prescription verification policy for specific restricted medical devices. Because federal law restricts these devices to sale by or on the order of a licensed healthcare provider, orders containing prescription-regulated equipment will remain on a compliance hold and will not be dispensed until a valid prescription is successfully received and verified by our compliance team. Link to our prescription policy and contact information.
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