Medical abbreviations : ' Q '

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Abbreviation	Interpretation
q	every   (e.g.  q6h = every 6 hours)
qd	every day
qh	every hour
q4h, q6h....	every 4 hours, every 6 hours etc.
qid	four times a day
QNS	quantity not sufficient
qod	every other day
Qs/Qt	shunt fraction
Qt	total cardiac output