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52 Examination of sputum for the presence of tuberculosis sticks It is carried out by flotation method. In this case, sputum is collected during the day in a sterile jar. If sputum is released little, it is collected for 3 days, keeping the spittoon in a cool place. The examination of the sputum for sensitivity to antibiotics In the morning, the patient spits several times into a sterile Petri dish, which is delivered immediately to the bacteriological laboratory. Sputum is sent in a vessel with a label indicating the patient’s Full name and the purpose of the study. The nurse should make sure that the pocket spittoons or cans are always clean. To do this, they are washed daily with warm water and boiled in a 2% solution of baking soda for 15 minutes. Standards for the implementation of oxygen therapy Pure oxygen is not used for oxygen therapy, as it inhibits the activity of the respiratory center, inhalation of pure oxygen can have a toxic effect on the body, manifested in the occurrence of dry mouth, burning sensation behind the sternum, chest pain, convulsions. Possible convulsions, loss of consciousness, and even death. For oxygen therapy, an oxygen-air mixture containing 40–60% oxygen is used. Only when carbon monoxide (carbon monoxide) poisoning is allowed to use a mixture containing 95% oxygen and 5% carbon dioxide. Oxygen therapy can be performed both with natural breathing and with the use of artificial lung ventilation (IVL) devices. At home, oxygen pillows are used for the purpose of oxygen therapy. In hospitals, oxygen therapy is performed using com- pressed oxygen cylinders or a centralized oxygen supply system to the wards. The most common method of oxygen therapy is its inhalation through nasal catheters, less often use nasal or oral masks, intubation and tracheostomy tubes, oxygen tents. Inhalation of the oxygen mixture is carried out continuously or in sessions of 30–60 minutes, several times a day. In this case, it is necessary that the supplied oxygen is necessarily moistened. Humidification is achieved by passing it through water (in the Bobrov apparatus with a centralized supply) or through moistened and folded in 2–3 layers of gauze (when using an oxygen pillow). But sometimes for the purpose of drying, for example, with pulmonary edema, when a large amount of liquid accumulates in the lungs, the oxygen-air mixture is passed through a de- foamer (most often 96% ethyl alcohol). Centralized oxygen supply is made from oxygen cylinders, which are located in a special room, from where oxygen is supplied to dosimeters through a system of metal tubes, where it is moistened and fed to the patient through a nasal catheter. Supply of oxygen-air mixture from the oxygen cushion Oxygen pillow – a rubberized bag equipped with a rubber tube with a tap and a mouthpiece (funnel). The oxygen cushion can hold from 25 to 75 liters of oxygen- air mixture, it lasts for 4–7 minutes.