Dear Dr. Roach: My husband is on oxygen, and he wont take the mobile tank while he is outside. Will being on oxygen give him longer life? M.K.
Answer: Many causes of chronic lung disease lead to low oxygen levels. If the resting oxygen level is low (less than 89% oxygen saturation), then oxygen is usually prescribed. Oxygen may also be prescribed for people whose oxygen level drops significantly during exercise, and in people with complications of low oxygen levels. There have been several studies looking to see whether oxygen therapy will give people a longer life.
Among people with lower oxygen levels, those who were treated with oxygen therapy for most of the day (18 hours) had a lower risk of dying than people who were treated with oxygen only at nighttime. This study was done specifically in people with chronic obstructive pulmonary disease, but other studies have confirmed that supplemental oxygen is beneficial for people with low oxygen levels, regardless of the underlying cause.
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