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Titolo:
Radiofrequency liver ablation: Experimental comparative study of water-cooled versus expandable systems
Autore:
de Baere, T; Denys, A; Wood, BJ; Lassau, N; Kardache, M; Vilgrain, V; Menu, Y; Roche, A;
Indirizzi:
Inst Gustave Roussy, Serv Radiol Intervent, F-94805 Villejuif, France InstGustave Roussy Villejuif France F-94805 , F-94805 Villejuif, France Hop Beaujon, Serv Imagerie Med, F-92110 Clichy, France Hop Beaujon Clichy France F-92110 v Imagerie Med, F-92110 Clichy, France NIH, Dept Radiol, Bethesda, MD 20892 USA NIH Bethesda MD USA 20892NIH, Dept Radiol, Bethesda, MD 20892 USA
Titolo Testata:
AMERICAN JOURNAL OF ROENTGENOLOGY
fascicolo: 1, volume: 176, anno: 2001,
pagine: 187 - 192
SICI:
0361-803X(200101)176:1<187:RLAECS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SMALL HEPATOCELLULAR-CARCINOMA; TISSUE ABLATION; HEPATIC METASTASES; NEEDLE ELECTRODE; TUMORS; ELECTROCAUTERY; EXPERIENCE; RESECTION; INCREASE; VOLUME;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: de Baere, T Inst Gustave Roussy, Serv Radiol Intervent, Rue Camille Desmoulins, F-94805 Villejuif, France Inst Gustave Roussy Rue Camille Desmoulins Villejuif France F-94805
Citazione:
T. de Baere et al., "Radiofrequency liver ablation: Experimental comparative study of water-cooled versus expandable systems", AM J ROENTG, 176(1), 2001, pp. 187-192

Abstract

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 anda 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 causedby 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 correspondto 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 lesionsproduced by the coaled-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.

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Documento generato il 23/09/20 alle ore 11:33:31