oximeter reading rises slowly

@hiker108 Pulse oximeters can be finicky devices. They do not read as quickly or accurately on individuals with heavily pigmented skin, cold hands, or with a poor fit (like in the case of arthritic fingers.)
Recently, there was a discussion elsewhere on Connect about variability depending on the finger used as well. Here is the discussion, with a link to the study that addresses the issue:
https://connect.mayoclinic.org/discussion/pulseoximeter-finger-readings-variations
While most photos and YouTube videos show the meter on the index finger, some people get a better reading on the middle finger of their dominant hand.

Have you tried using different fingers when you measure?

I think we typically take shallow breaths which can impact the lungs capability to produce the right level of O2. Once taking a few deep breaths the the process improves as you have discovered. Do you have shortness of breath at rest?
I have experienced the same thing.

What is weird is that others don't experience this with my oximeter. Only
me. I am 78 and I have some problems.

@hiker108 Well, I know at least one other that has this issue. For me it starts at 90 and with a few deep breaths climbs to 95. I'm older as well. What are your 'some problems"? Are they respiratory in nature?

I lerned today that it works for me if I use pinky or ring finger/ Much better instant reading.