Nonne-Froin Sign– Dilemma for Subarachnoid Block

Abstract

Accidental finding of yellow colored CSF may pose a sudden dilemma to the mind of anesthesiologist whether to perform the block or not. Yellow coloration of CSF can be due to subarachnoid bleed or raised protein in the CSF. Anesthesiologists should have a working knowledge of this subject which will help in managing the cases peri-operatively with improved outcome.