Pic Today 2/4/18

 

WHY IS MY FINGER PINK?

While spending an unexpected

night in the hospital,

I woke up to find myself

entangled by wires

connected to various parts

of my body.

I was especially startled

to find my index finger tip

glowing a brilliant pink.

It didn't hurt,

so I quickly found my pillow

and returned to sleep.

This morning, my nurse

explained it was the latest

in pulse oximetry.

A device that passes harmless

wavelengths of light

through the finger to

 measure accurate concentrations 

of arterial hemoglobin.

(E.T. phone home!)