Alargamiento sobre clavo endomedular en extremidades inferiores - Serie de casos clínicos

Resumen

Objetivo Evaluar los resultados de alargamiento óseo sobre clavo endomedular (LON) en extremidades inferiores; comparar resultados locales con la literatura.

Material y Método Estudio retrospectivo de pacientes operados con LON entre los años 2011 y 2015, con información de ficha clínica e imagenología. Descripción del paciente, procedimiento y evolución; con cálculo del Índice de Consolidación Radiológica (RCI) e Índice de Fijación Externa (EFI). Comparación con la literatura.

Resultados Se reunieron 8 pacientes, con 12 procedimientos LON. 4 pacientes tuvieron alargamiento bilateral por talla baja constitucional y 4 pacientes tuvieron alargamiento unilateral por defectos de longitud, congénitos o adquiridos. En fémur (6) el alargamiento promedio fue 51 mm con 134 días de uso de tutor externo. El EFI promedio fue 0,87 meses/centímetro y RCI 1.83 meses/centímetro. En tibia (4) el alargamiento promedio fue 82 mm con 121 días de uso de tutor externo. El EFI promedio fue 0,49 meses/centímetro y RCI 1.64 meses/ centímetro. Todos los pacientes presentaron infección superficial de pines, requiriendo antibioterapia oral. 4 pacientes con LON de tibia presentaron contractura en equino y requirieron de alargamiento aquiliano percutáneo. 3 pacientes con LON de fémur presentaron retardo de consolidación, 2 requirieron aporte de injerto óseo.

Discusión El LON es una excelente alternativa a los métodos tradicionales de alargamiento, con tiempos más cortos de uso de tutor externo. Se observan complicaciones relacionadas con la contractura músculo-tendinosa, manejadas al momento del retiro de tutor externo, con resultados satisfactorios para el paciente.

Nivel de evidencia evidencia tipo 4, serie de casos clínicos

Abstract

Objective To evaluate the results of bone lengthening over an intramedullay nail (LON) in lower limbs and compare our results with the literature.

Material and Method retrospective study of patients who underwent LON between may 2011 and June 2015. The information was collected from clinical charts and Radiological studies. Description of the demographic data, procedures performed and follow up were registered. ; calculation of radiological consolidation index (RCI) and of external fixation index (EFI), previously defined in the literature, was performed.

Results A total of 8 patients, with 12 LON procedures were included. 4 patients had bilateral lengthening for constitutional short stature and 4 patients had unilateral Lengthening for congenital or acquired defects. On femur (6), the average Lengthening was 51 mm. Mean time on external fixator was 134 days. The average EFI was 0.87 months/cm and RCI 1.83 months/cm. On tibia (4) the mean lengthening was 82 mm, and external fixator time was 121 days. The average EFI was 0.49 months/cm and RCI 1.64 months/cm. All patients had at least one superficial pin site infection, requiring oral antibiotic therapy. 4 patients whitin tibia group had an Equinus Contracture that required percutaneous Achilles lengthening. 3 patients whitin femoral group developed delayed bone healing and 2 of them required bone grafting on the distraction site.

Discussion LON is an excellent alternative to traditional methods of lengthening, with shorter times under external fixator. There are complications related to tendon and muscle contracture, handled at the time of removal of external fixator, with satisfactory results for the patient.

Level of Evidence evidence type 4, series of clinical cases

Palabras Clave

alargamiento óseo - clavo endomedular - osteogénesis por distracción

Keywords

bone lengthening - intramedullay nail - distraction osteogenesis

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