What the heck is a 4 channel?

Beth_Ann
on 8/25/05 10:46 am - Northwestern, PA
I saw my lung doctor today for my pre-op evaluation. He did my chest x-ray and gave me a basic PFT. Then he ordered a sleep study even though my surgeon didn't. Oh well. Better safe than sorry. The one nurse who took my information for the study said something about a 4 channel. Anybody know what the heck this is? Thanks!
Most Active
×