Why do such a high percentage of my labor epidurals turn out to be one-sided?? Someone help me out here...i don't know what i'm doing wrong but it seems like one out of every four or five that i put in the woman gets a unilateral block. I typically do CSE because it gets 'em comfortable fast, and i don't have to waste time sticking around bolusing up the epidural, and it give me extra reassurance that my tuohy tip is in the right place (and i don't buy that nonsense about "untested" catheter); normally tape the catheter at 4 - 6 cm in the space. One of my attendings suggested maybe taping at 3 - 4cm but that didn't seem to work. So is my estimate of midline just that bad?? Anybody have any suggestions?