Questions about COPD patients and oxygen?

[Nurseunite]

I’ve just started home health and I’m confused on COPD patients l, their oxygen sats and oxygen levels.

So is it true that COPD patients thrive better when oxygen levels are 88-92%?
What happens if they go above and are asymptomatic?

What of the patient doesn’t have oxygen and their o2 sat is at >92% ? 
 
What oxygen rate shouldn’t a COPD patient go above?

So Doctor’s order 2L and the patient has SOB but do better on 4L. So then what? 

What happens if a COPD patient is in the 80’s or low 90’s do you panic, especially if no patient oxygen?

Sorry for all the questions.

[NRSKarenRN, BSN, RN]

Several posts in AN's Pulmonary Nursing area may help you.

UK: Nursing Times has good info:

Diagnosis and management of COPD: a case study

COPD 1: pathophysiology, diagnosis and prognosis

COPD 2: management and nursing care

Oxygen Therapy in COPD

My internet wonky...will try and return to answer questions tomorrow.