Titre
Radiofrequency liver ablation: experimental comparative study of water-cooled versus expandable systems.
Type
article
Institution
Externe
Périodique
Ajr. American Journal of Roentgenology
Auteur(s)
de Baere, T.
Auteure/Auteur
Denys, A.
Auteure/Auteur
Wood, B.J.
Auteure/Auteur
Lassau, N.
Auteure/Auteur
Kardache, M.
Auteure/Auteur
Vilgrain, V.
Auteure/Auteur
Menu, Y.
Auteure/Auteur
Roche, A.
Auteure/Auteur
Liens vers les personnes
ISSN
0361-803X[print], 0361-803X[linking]
Statut éditorial
Publié
Date de publication
2001
Volume
176
Numéro
1
Première page
187
Dernière page/numéro d’article
192
Langue
anglais
Notes
Publication types: Comparative Study ; In Vitro ; Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
OBJECTIVE. We evaluate the uniformity and reproducibility of thermal lesion ablation and quantify the volume of tissue destruction and hemorrhage induced with two different commercially available radiofrequency ablation devices. MATERIALS AND METHODS. A four-array anchor expandable needle electrode and a triple-cluster cooled-tip needle electrode were used to induce lesions in three explanted calf livers and in vivo in eight swine livers. The sizes of the radiofrequency-induced lesions were macroscopically evaluated by measuring two perpendicular dimensions immediately after the experiment. Bleeding was evaluated by weighing gauze swabs used to dry the hemorrhage caused by electrode insertions. RESULTS. In explanted liver, the mean diameter of the radiofrequency-induced lesion was 5.3 +/- 0.7 cm for the cooled-tip needle and 3.7 +/- 0.4 cm for the expandable needle (p = 0.042), which correspond to approximate volumes of 65.35 +/- 26.22 cm(3) and 26.67 +/- 9.59 cm(3), respectively (p < 0.002). In vivo, the mean diameter was 3.7 +/- 0.4 cm for the cooled-tip needle and 3 +/- 0.4 cm for the expandable needle (p < 0.0001), which correspond to approximate volumes of 24.18 +/- 7.56 cm(3) and 11.16 +/- 3.65 cm(3), respectively (p < 0.0001). Blood loss attained a median value of 3.5 g for the cooled-tip needle and 2.6 g for the expandable needle; this difference was not statistically significant (p = 0.06). CONCLUSION. The cooled-tip needle induced significantly larger lesions than the expandable needle, but the lesions produced by the expandable needle are more reproducible, uniform, and spheric. The larger size of the lesions produced by the cooled-tip needle may be attributed to the higher maximum power used by the generator and the higher energy deposition, which is due to the cooling of the needle electrode.
PID Serval
serval:BIB_B41C11892850
PMID
Date de création
2010-03-16T10:45:10.288Z
Date de création dans IRIS
2025-05-20T21:42:28Z