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1.
Rev Esp Cir Ortop Traumatol ; 60(5): 325-9, 2016.
Article in English, Spanish | MEDLINE | ID: mdl-25843064

ABSTRACT

The growing rod technique is currently one of the most common procedures used in the management of early onset scoliosis. However, in order to preserve spine growth and control the deformity it requires frequent surgeries to distract the rods. Magnetically driven growing rods have recently been introduced with same treatment goal, but without the inconvenience of repeated surgical distractions. One of the limitations of this technical advance is an increase in radiation exposure due to the increase in distraction frequency compared to conventional growing rods. An improvement of the original technique is presented, proposing a solution to the inconvenience of multiple radiation exposure using ultrasound technology to control the distraction process of magnetically driven growing rods.


Subject(s)
Magnets , Orthopedic Procedures/methods , Scoliosis/surgery , Ultrasonography, Interventional , Child, Preschool , Humans , Male , Orthopedic Procedures/instrumentation , Scoliosis/diagnostic imaging
2.
Rev. Soc. Andal. Traumatol. Ortop. (Ed. impr.) ; 30(1): 10-18, ene.-jun. 2013. ilus, tab
Article in Spanish | IBECS | ID: ibc-120208

ABSTRACT

Introducción: La inestabilidad de tobillo y de retropié coexisten frecuentemente sin que existan en la actualidad métodos objetivos no quirúrgicos para su diagnóstico diferencial. Además, la inestabilidad y el dolor en la articulación subastragalina pueden desembocar en la temida artrosis de retropié en pacientes de cualquier edad. El presente trabajo tiene como propósito principal comparar el rango de movilidad del retropié sintomático respecto al retropié sano en una serie consecutiva de pacientes afectos de inestabilidad de tobillo. Material y Método: Se diseñó un dispositivo que simula condiciones de carga con movimientos extremos de la articulación subastragalina sobre la mesa de TAC (Estrés-BaroPodo-TAC). Se realizó TAC en carga y en dos posiciones extremas de inversión-rotación interna y eversión-rotación externa sobre 26 pies de 13 pacientes diagnosticados de inestabilidad crónica de tobillo. Se midieron los ángulos de divergencia y flexión astrágalo-calcánea en las dos posiciones mencionadas y se calculó el rango de movimiento total. Se comparó el retropié problema con el retropié sano en cada paciente. Resultados: Los pies problemas presentaron mayor rango de movilidad de divergencia astrágalo-calcáneo que los pies sanos de los pacientes. No hubo diferencias en el rango de movilidad de flexión astrágalo-calcáneo. No se correlacionó estadísticamente el movimiento de divergencia en el plano axial con el movimiento de flexión astrágalo-calcánea en el plano sagital. Conclusión: Mediante este método se midió objetivamente mediante TAC el rango de movimiento de la articulación subastragalina. Los pacientes con inestabilidad de tobillo y dolor en retropié presentaron mayor rango de movilidad en la articulación subastragalina en el retropié doloroso respecto al contralateral (AU)


Introduction: In many cases, unstable ankle and heel coexist without there currently being any objective, non-surgical method for a differential diagnosis. Moreover, instability and pain in the subtalar joint could deteriorate into the so dreaded osteoarthritis of the heel in patients of any age. The main objective of this work is to compare the movement range of a symptomatic heel with regards to a healthy heel in a consecutive series of patients affected with ankle instability. Material and method: A device was designed to simulate weight-bearing conditions with extreme subtalar joint movement on the CAT scan examination table (Estrés-BaroPodo-TAC). A CAT scan was performed during weight-bearing and in two extreme positions of internal inversion rotation and external eversion rotation of 26 feet in 13 patients, all diagnosed with chronic, unstable ankle. The divergence and flexion of heel angles in the two positions mentioned and the total movement range was calculated. The heel problem was compared with the healthy heel in each patient. Results: The problem foot presented a greater range of heel divergence mobility than the patient’s healthy foot. There were no differences in the mobility range for heel flexion. The divergence of movement in the axial plane was not statistically correlated with the heel flexion movement in the sagittal plane. Conclusion: With this method, we objectively measured the movement range of the heel joint, using CAT scan. Patients with unstable ankle and heel pain presented a greater range of movement in the heel joint of the painful heel with respect to the contralateral movement (AU)


Subject(s)
Humans , Joint Instability/diagnosis , Subtalar Joint/physiopathology , Arthralgia/diagnosis , Tomography, X-Ray Computed/methods , Biomechanical Phenomena
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