title: [Usefulness of electromagnetic fields in the treatment of hip avascular necrosis: a prospective study of 30 cases].
abstract: A series is here reported of 30 hips from 21 patients with the diagnosis of avascular necrosis in different stages (Ficat 0 = 1, I = 4, II = 13, III = 10, IV = 2). Patients underwent external electro-stimulation by means of a electromagnetic field generator, and results were evaluated by NMR at three-month intervals. Lesions were categorized by NMR: < 25%, 25%-50%, and > 50% of involved head volume. The grading of lesions yielded the following distribution: grade 1 = 12, grade 2 = 10, and grade 3 = 7. Results were categorized in "clinical success", "NMR success" and "combined success" when symptoms decreased or disappeared, the lesion stabilized by NMR, or both, respectively. Overall, the corresponding figures were 80%, 76.6%, and 63.3%, and were remarkably influenced by the NMR grading of the lesion.
authors.affiliation: Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario San Carlos, Madrid.
authors.forename: B C
authors.initials: BC
authors.lastname: Lluch
authors.forename: D G
authors.initials: DG
authors.lastname: García-Andrade
authors.forename: F L
authors.initials: FL
authors.lastname: Muñoz
authors.forename: L L
authors.initials: LL
authors.lastname: Stern
mesh_terms: D000328:Adult; D000368:Aged; D004599:Electric Stimulation Therapy; D004574:Electromagnetic Fields; D005069:Evaluation Studies as Topic; D005260:Female; D005271:Femur Head Necrosis / Q000175:diagnosis / Q000628:therapy*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013997:Time Factors
vernacular_title: Utilidad de los campos electromagnéticos en el tratamiento de la necrosis avascular de cadera: estudio prospectivo de 30 casos.