A Randomized Double-Blind Prospective Study of the Efficacy of Pulsed Electromagnetic Fields for Interbody Lumbar FusionsMOONEY, VERT, MDSpine: July 1990 - Volume 15 - Issue 7 - p 708-712 Original Article: PDF Only Abstract Author Information A randomized double-blind prospective study of pulsed electromagnetic fields for lumbar interbody fusions was performed on 195 subjects. There were 98 subjects in the active group and 97 subjects in the placebo group. A brace containing equipment to induce an electromagnetic field was applied to patients undergoing interbody fusion in the active group, and a sham brace was used in the control group. In the active group there was a 92% success rate, while the control group had a 65% success rate (P > 0.005). The effectiveness of bone graft stimulation with the device is thus established. From the University of California, Irvine, Division of Orthopaedic Surgery, Irvine, California © Lippincott-Raven Publishers.