A Prospective, Randomized Evaluation of the Effects of Epidural Needle Rotation on the Distribution of Epidural Block

We evaluated the effects of turning the tip of the Tuohy needle 45° toward the operative side before threading the epidural catheter (45°-rotation group, n = 24) as compared to a conventional insertion technique with the tip of the Tuohy needle oriented at 90° cephalad (control group, n = 24) on the