For the same delivered energy, the new protocol significantly increases the magnitude of the applied electric field, which may be the reason why it is clinically more effective in achieving pain relief.
The results suggest that (1) the clinical parameters considered to be suitable for bipolar CRF should not necessarily be considered valid for bipolar PRF, and vice versa; and (2) the ablative effect of the CRF mode is mainly due to its much greater level of delivered energy than is the case in PRF, and therefore at same applied energy levels, CRF, and PRF are expected to result in same outcomes in terms of thermal damage zone dimension.
Interventional techniques for pain treatment have importantly increased in recent years, and particularly those based on radiofrequency energy, both thermal and pulsed. This report clarifies some important concepts about electrical phenomena involved during using these techniques, given a comprehensive explanation about types and modes of applying RF energy. Moreover, guidelines about the patterns of affected zones are defined dependent on the chosen arrangement. From a physical point of view, equations governing RF process are also presented. RF generator users should be knowledgeable about what is happening in each RF-based treatment in order to select the most suitable arrangement for the patient.
RESUMENLas técnicas intervencionistas para el tratamiento del dolor han experimentado en los últimos años un significativo aumento, y particularmente las basadas en energía de radiofrecuencia, tanto térmica, como pulsada. Este artículo clarifica algunos de los principales conceptos relacionados con los fenómenos eléc-tricos que ocurren durante el uso de las mencionadas técnicas, proporcionando una comprensión sobre los tipos y modos existentes de aplicación de radiofrecuencia. Asimismo, se definen las pautas en la morfología de las zonas afectadas según las distintas configuraciones, y se revisa, desde un punto de vista fí-sico, cuáles son las ecuaciones que aplican en cualquier proceso de radiofrecuencia. El usuario de los generadores de radiofrecuencia debe tener conocimientos sobre lo que está ocurriendo en cada uno de los posibles tratamientos, con el objeto de seleccionar la más idónea de las opciones para el paciente.Palabras clave: Radiofrecuencia. Térmica. Pulsada. Aspectos teóricos. Morfología. Tipos de radiofrecuencia. Modos de radiofrecuencia. Ecuaciones de gobierno.
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