Delivery systems, flow rates, fire safety, equipment monitoring, and SpO2 targets
Home oxygen therapy requires more than simply setting a flow rate. Safe, effective oxygen management in the home involves understanding delivery systems, maintaining equipment, teaching fire safety, monitoring the client's response, and knowing when to escalate. These responsibilities fall squarely within the home health clinician's scope.
The most common home device. Extracts oxygen from room air — provides continuous supply without tank refills. Requires electricity. Clients must have a backup supply (portable tank) for power outages. Flow rates typically 1–5 LPM continuous; some models deliver up to 10 LPM.
Portable tanks for ambulation and travel. Large tanks ("H" or "K" size) are used in some homes. Must be stored upright and secured to prevent falling. Calculate duration: full tank pressure ÷ current pressure × tank factor ÷ flow rate = minutes of oxygen remaining.
Store oxygen as liquid; convert to gas for use. Very efficient — a small portable unit can hold more oxygen than a comparable-sized compressed gas cylinder. Requires specialized handling; can cause cold burns if liquid contacts skin.
Nasal cannula (1–6 LPM, 24–44% FiO2) is standard for home use. Simple face mask (5–10 LPM, 35–50% FiO2) and Venturi mask (precise FiO2 delivery) are used for higher-acuity clients. Oxygen-conserving devices (pendant cannulas, reservoir cannulas) extend cylinder life.
Oxygen does not burn, but it accelerates combustion dramatically. In an oxygen-enriched environment, fires start more easily and burn faster and hotter. Home safety rules: no smoking in the home (or within 10 feet of any oxygen source), no open flames or spark-producing devices near oxygen, no aerosol sprays (hairspray, deodorant) near oxygen, store cylinders away from heat sources, post "No Smoking — Oxygen in Use" signs at all home entrances, and keep a fire extinguisher accessible.
At every visit check: oxygen is flowing at the prescribed rate, tubing is free of kinks and not excessively long (>50 feet increases resistance), nasal cannula is clean and positioned correctly, humidifier water is clean and at the correct level, concentrator filter is clean, and the client's response to therapy (SpO2 relative to target and baseline). Nasal cannula tubing should be replaced every 2–4 weeks; humidifier water and bottles should be changed per protocol to prevent bacterial colonization.
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