An Ex Vivo Comparison of Cooled-Radiofrequency and Bipolar-Radiofrequency Lesion Size and the Effect of Injected Fluids

Abstract

Cooled-RF yields larger lesions than bipolar-RF under the conditions used in this study. The spherical shape of cooled-RF lesions provides larger volume coverage than lesions obtained with bipolar-RF at IED equals 5, 10, or 15 mm under similar electrode tip temperature and lesioning time.

Hypertonic Sodium Chloride Preinjectate Increases In Vivo Radiofrequency Ablation Size

“…[9][10][11]19,20 Our histological analysis further advances our understanding and demonstrates that temperature-controlled monopolar RFA lesions produce 3 distinct histological zones (MT-H1, H2, and H3) of nonviable tissue. The histological zones' absolute and relative sizes are influenced by the addition of hypertonic saline to the preinjectate.…”

Innervation of the Anterior Capsule of the Human Knee

“…Bipolar RF lesion techniques may be considered, although a minimum of 2 contiguous lesions across each nerve site would be required to provide a 10-mm equivalent lesion geometry. 20 Use of a single expanded volume lesion technique with a 17gauge, 4-mm electrode tip cooled RF catheter system (Coolief Cooled Radiofrequency Probe; Halyard Health, Alpharetta, Georgia) produces an oblate spheroidal-shaped thermocoagulated volume of 10-to 12-mm diameter. Cooled RF probe techniques placed at the epiphysis/diaphysis junction target purely radiographic landmarks and improve the likelihood of successful inclusion of a segment of the relevant genicular nerve as well as including a longer segment of nerve within the thermocoagulated tissue volume with a single RF cannula placement than either the Choi or Ikeuchi techniques; theoretically portending a more durable clinical outcome.…”

Aspectos teóricos sobre la biofísica de la radiofrecuencia aplicada al tratamiento del dolor

“…Dos estudios (19,20) recientes determinan el efecto de la infusión de volumen en el tamaño de la lesión en CRF con configuraciones monopolar y bipolar. En estos estudios se concluye que la presencia de fluidos, especialmente los que contienen electrólitos, puede inducir a la creación de tamaños de lesiones mayores, y especialmente en configuraciones bipolares.…”