Infusion of hypertonic saline into the lung parenchyma during radiofrequency ablation of the lungs with multitined expandable electrodes: Results using a porcine model

Tatsuhiko Iishi, Takao Hiraki, Hidefumi Mimura, Hideo Gobara, Taichi Kurose, Hiroyasu Fujiwara, Jun Sakurai, Hiroyuki Yanai, Tadashi Yoshino, Susumu Kanazawa

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The present study was performed to clarify the effect of hypertonic saline infusion into the lung parenchyma on radiofrequency ablation (RFA) of the lungs. A total of 20 ablation zones were created in 3 pigs. The ablation zones were divided into 3 groups. Group 1 (n = 6) consisted of ablation zones created by applying smaller radiofrequency (RF) power without saline infusion; group 2 (n = 5) zones were created by applying greater RF power without saline infusion; and group 3 (n = 9) zones were created by applying greater RF power with saline infusion. The techniques of saline infusion included administration of hypertonic saline 1 ml before RFA, followed by continuous administration at a rate of lml/min during the first 2min after the initiation of RFA. The ablation parameters and coagulation necrosis volumes were compared among the groups. Group 3 had a tendency toward smaller mean impedance than group 1 (p = 0.059) and group 2 (p = 0.053). Group 3 showed significantly longer RF application time than group 2 (p - 0.004) and significantly greater maximum RF power than group 1 (p = 0.001) and group 2 (p = 0.004). Group 3 showed significantly larger coagulation necrosis volume (mean, 1,421mm3) than group 2 (mean, 858 mm3, p = 0.039) and had a tendency toward larger necrosis volume than group 1 (mean, 878 mm3, p = 0.077). Although this small study had limited statistical power, hypertonic saline infusion during RFA appeared to enlarge coagulation necrosis of the lung parenchyma.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalActa medica Okayama
Volume63
Issue number3
Publication statusPublished - Jul 2009

Keywords

  • Experimental study
  • Lung
  • Radiofrequency ablation

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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