title: A locking collar for Luque rods.
abstract: The migration of hardware has been a problem in the Luque system of segmental spinal instrumentation. To prevent this migration, a device was designed to slip on the 3/16th inch or 1/4 inch Luque rod. This prevents movement between the wire-rod interface, stopping both distal and proximal rotation of the rod. This article reports 21 patients with neuromuscular scoliosis on whom this technique was used. There was no migration of hardware and only one wire breakage in an area separate from the locking collar. These results are a marked improvement from patients of previous reports who did not receive the new device. Laboratory testing on the locking collar determined the best location on the "L" rod to be in the middle third of the rod. Rod migration has essentially been eliminated with this technique.
authors.affiliation: Department of Pediatric Orthopedics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock 72202.
authors.forename: R E
authors.initials: RE
authors.lastname: McCarthy
authors.forename: F L
authors.initials: FL
authors.lastname: McCullough
authors.forename: R D
authors.initials: RD
authors.lastname: Peek
authors.forename: B H
authors.initials: BH
authors.lastname: Harrison
mesh_terms: D000293:Adolescent; D000818:Animals; D001696:Biomechanical Phenomena; D002417:Cattle; D002648:Child; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D009984:Orthopedic Fixation Devices; D011183:Postoperative Complications / Q000209:etiology / Q000601:surgery; D011859:Radiography; D012086:Reoperation; D012600:Scoliosis / Q000000981:diagnostic imaging / Q000601:surgery*