My mother is 97 years old. She had a minor heart failure with a BNP of 110. Recently, she had a bad UTI and asthma. Up to that point, her O2 saturation levels without supplemental oxygen were 95 to 96. Now that she is recovering from UTI, her O2 levels are 97 to 98 with 2 liters of supplemental O2 and her O2 level without supplemental O2 are between 88 and 92. All of these numbers are at rest. She does not do too much activity. What can be the contributing factor to this change? She had a chest CT scan and it did not show COPD. Should she stay on the O2? It is somewhat of a hazard. The tubing is difficult for her to handle. We must have someone with her all the time even throughout the night. We are concerned if she gets up to use the bathroom her foot will get caught on the tubing. She had a complete blood workup done. All the results were normal except that she is anemic. Currently, she is using nebulizer given by the primary care physician containing Ipratropium, Levalbuterol, Budesonide and antibiotics for recurrent UTI.