The mixture rule states that any mixture of a listed hazardous waste and a non-hazardous waste remains regulated as a hazardous waste. Mixtures of characteristic wastes and non-hazardous waste are regulated as hazardous waste if the resultant mixture continues to exhibit the characteristic.
1 Wash the cannula in soapy water and rinse it with a solution of 10 parts water and one part vinegar. 2  Rinse thoroughly with hot water and hang to dry.  This connects the nasal cannula to the oxygen concentrator. It doesnât need to be cleaned, but plan to replace it every 6 to 12 months advises the ATS.
If your patient is given supplemental oxygen, for example, you'll need to wait at least 15 minutes before drawing the sample to get an accurate reading. Wait at least 20 minutes after a nebulizer treatment or suctioning. Temperature, respiratory rate, and level of anxiety can alter the results, as well.