There are diff types of PSG , depending on the number of signals we assess in the test at night. The choice of the type of test depends on the main complaints- is it snoring and choking and a high chance of OSA- then a type 3 ( limited channel testing) is also ok, but for those with suspected parasomnia, narcolepsy, pLMD etc a l type 1 study will be required.
Once you’re diagnosed with sleep apnea, your treating physician will advise PAP devices according to your reports. So we would advise to consult a sleep specialist doctor.
It depends what are the main symptoms- CPAP improves snoring, daytime sleepiness, blood pressure and blood sugar control . However, insomnia, RLS etc are not improved by CPAP alone. So your doctor will have to re -evaluate and decide the appropriate treatment for your other complaints