The Nelson inhaler is a traditional piece of medical equipment designed to deliver moist heat and medicated steam to the upper respiratory tract. Constructed typically from earthenware or heavy ceramic, it features a specialized design that allows patients to inhale warm vapor safely without scalding their faces. In Nigerian clinical practice, particularly in ENT and general medical wards, it remains a valuable, low-cost bedside therapy for loosening thick respiratory secretions, relieving nasal congestion, and soothing inflamed mucous membranes. Unlike modern electric nebulizers that create a fine aerosol mist via compression, the Nelson inhaler relies strictly on steam generated from boiling water combined with volatile compounds like Tincture of Benzoin or menthol crystals.
A standard Nelson inhaler consists of specific structural parts engineered for safety and functional delivery of steam:
Nurses administer steam therapy using a Nelson inhaler to manage several upper respiratory conditions. The primary goal is to promote vasodilation of the nasal mucosa, reduce localized inflammation, and liquefy tenacious secretions.
Proper preparation ensures both therapeutic efficacy and patient safety before the procedure begins. The nurse must gather the ceramic Nelson inhaler, a measuring jug, freshly boiled water, and the prescribed volatile agent, such as Tincture of Benzoin.
Fill the ceramic pot roughly two-thirds full with boiling water, leaving adequate headspace for the steam and cork assembly. Add the exact measured dose of medication according to hospital policy or the physician's prescription—typically one to two teaspoonfuls of Tincture of Benzoin. Insert the cork carrying the mouthpiece and air inlet securely into the top of the container. Always test the temperature of the emerging vapor by holding your hand a short distance away from the mouthpiece before presenting the device to the patient.
Administering treatment with a Nelson inhaler requires a calm environment and clear communication. Position the patient comfortably in an upright sitting posture, either in bed with back support or on a chair. Place the assembled inhaler on a stable, flat surface such as an over-bed table at a safe height to prevent accidental tipping. Instruct the patient to place their lips lightly around the mouthpiece—not biting down or sealing it completely tight—and to take slow, deep breaths through the mouth and exhale through the nose. Monitor the patient continuously throughout the session, which typically lasts between 5 to 10 minutes, or until the steam ceases to produce warmth.
Working with boiling water and glass or ceramic apparatus carries inherent risks that demand strict vigilance from the nurse. Never leave a patient unattended with an active Nelson inhaler, especially if they are elderly, weak, or confused. The most significant hazard is thermal scalding from accidental spillage of the boiling contents or direct contact with excessively hot steam. Keep the device on a stable surface well out of the reach of children. If the patient shows signs of respiratory distress, dizziness, or facial redness, discontinue the treatment immediately.
After completing the inhalation session, ensure the patient is comfortable and wipe away any condensed moisture from their face and chin. Dispose of the remaining water safely down the sink drain. Disassemble the Nelson inhaler by removing the cork and mouthpiece. Wash all components thoroughly with hot soapy water, using a bottle brush to scrub the interior of the ceramic body and remove any resin buildup from volatile medications like Tincture of Benzoin. Rinse the parts with clean water and allow them to air dry completely before storing the device in a clean utility cupboard.