Inhalation, in a concentration of 40-60%, in a mixture with air, in an amount of 4-5 l / min.
When breathing is weakened in the postoperative period, when poisoning, intoxication is used 100% oxygen or a mixture of carbonic acid.
Dosage regimen in all age groups, except for newborns, coincides.
To introduce oxygen in high and low concentrations, different equipment is used. The minimum concentration of oxygen should not be lower than its content in atmospheric air (20.9%).
Systems for inhalation with a fixed concentration of oxygen (regardless of the patient's breathing attempts): high flow - masks that provide oxygen supply at a high flow rate; low flow - anesthesia contours. In these systems, the oxygen concentration is set by the doctor.
Inhalation systems that de-energize the supply of varying oxygen concentrations (depending on the patient's inspiratory strength): without recirculation, catheters and cannulas; with recirculation - oxygen masks.These systems work only in conditions of self-breathing of the patient who inhales the gas mixture. The oxygen content of the gas mixture will depend on the condition of the patient and the device used.
In newborns, the concentration of oxygen in the inhaled mixture should not exceed 40% (the risk of retrolental fibroplasia).
In elderly patients with chronic bronchitis, the inhaled oxygen concentration should be increased by 1% and not exceed 30% (most often).