#3541 ·
Hello. My mother (63 years old) is currently battling lung cancer that has unfortunately metastasized to her bones. She has completed three cycles of chemotherapy, and while we saw some success with the tumor shrinking, things took a turn when she developed pneumonia. She spent a week hospitalized, but she’s been discharged now with instructions to use supplemental oxygen (4L for 18 hours a day) because her levels have dropped significantly. To give you an idea of the situation, when she isn't using the oxygen, the pulse oximeter shows readings as low as 80—usually hovering somewhere between 80 and 85—yet strangely, she doesn't even seem to notice the dip; she isn't gasping for air or struggling heavily to breathe.
When she uses the nasal cannulas, her levels quickly climb back above 90.
However, here is the frustrating part: despite receiving continuous oxygen throughout the night, she often wakes up with a reading of 80, sometimes even lower. It feels like a losing battle because during the day, while she is using the oxygen, she stays consistently above 90, but the overnight drop is baffling. Does anyone know why her levels would plummet like this even though she is actively receiving oxygen? Is there a physiological reason for this phenomenon that I might be missing?
I can't help but wonder if she might be mouth-breathing in her sleep, which would prevent the oxygen from properly entering through the nose—I'm not sure if that's a valid theory. Perhaps she should be using an oxygen mask at night instead of those small nasal tubes? If it actually makes a difference, is there a significant clinical distinction between the full masks people often wear and the nasal cannulas?
When she uses the nasal cannulas, her levels quickly climb back above 90.
However, here is the frustrating part: despite receiving continuous oxygen throughout the night, she often wakes up with a reading of 80, sometimes even lower. It feels like a losing battle because during the day, while she is using the oxygen, she stays consistently above 90, but the overnight drop is baffling. Does anyone know why her levels would plummet like this even though she is actively receiving oxygen? Is there a physiological reason for this phenomenon that I might be missing?
I can't help but wonder if she might be mouth-breathing in her sleep, which would prevent the oxygen from properly entering through the nose—I'm not sure if that's a valid theory. Perhaps she should be using an oxygen mask at night instead of those small nasal tubes? If it actually makes a difference, is there a significant clinical distinction between the full masks people often wear and the nasal cannulas?