SPO2 trend during sleeping

I have been using CPAP during sleeping.  I do not have much update and not many thing to post this blog recently.  Today, I review SPO2 trend last a few months.

I have been collecting SPO2 data during sleeping almost every day since May 26, 2018.

Here is the average data and I can see a good improvement.

3rd week of May to 2nd week of June (without CPAP)

• SPO2(Average)                            94.0 %
• SPO2(minimum)                          87.0 %
• SPO2 drop more than 5%            1.3 / hour
• SPO2 drop 4 ~ 5%                       3.0 / hour
• SPO2 drop 3 ~ 4%                       8.4 / hour
• Weight                                          165.6 lb / 75.1 kg

3rd week of June to 2nd week of July (excluding days for CPAP trial)

• SPO2(Average)                            94.6 %
• SPO2(minimum)                          87.3 %
• SPO2 drop more than 5%            1.1 / hour
• SPO2 drop 4 ~ 5%                       2.4 / hour
• SPO2 drop 3 ~ 4%                       6.9 / hour
• Weight                                          161.4 lb / 73.2 kg

3rd week of July to 2nd week of August (with CPAP)

• SPO2 (Average)                            95 %
• SPO2 (minimum)                          89.2 %
• SPO2 drop more than 5%             0.6 / hour
• SPO2 drop 4 ~ 5%                        1.6 / hour
• SPO2 drop 3 ~ 4%                        5.5 / hour
• Weight                                           158.7 lb / 72.0 kg

8月下旬から9月中旬　（CPAP使用）

• SPO2 (Average)                           95.6 %
• SPO2 (minimum)                         91.2 %
• SPO2 drop  more than 5%           0.3 / hour
• SPO2 drop 4 ~ 5%                       0.9 / hour
• SPO2 drop 3 ~ 4%                       3.8 / hour
• Weight                                          156.1 lb / 70.8 kg

SPO2 drop less than 3%, I do not see any difference therefore I did not show here.  It is probably including some measurement error and I do not believe there is no point to compare them.

Before mid June, I felt some symptoms such as felt tired right after waking up and very strong sleepiness during daytime.   However they are going away after that.  I started using CPAP in mid July and the number is significantly improved.

The average SPO2 value is improved by 1.6%.  I think CPAP works very well.  However I think this improvement is not only CPAP but also weight reduction.  Before using CPAP, the value is improved with weight reduction.  I lost about 4 lb.  However, I also tried to improve the symptom with changing sleeping positions as well.  (I think sleeping position is one of factor to improve the value)

After starting using CPAP, there is some improvement.  I think this is due to weight reduction as well as I adopted using CPAP device and the quality of sleeping is getting better.  At least, CPAP and weight reduction works very well in my case.