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Bipolar radiofrequency ablation in ex vivo bovine liver with the open-perfused system versus the cooled-wet system

DC Field Value Language
dc.contributor.authorLee, Jeong Min-
dc.contributor.authorHan, Joon Koo-
dc.contributor.authorKim, Se Hyung-
dc.contributor.authorSohn, Kyu Li-
dc.contributor.authorChoi, Seung Hong-
dc.contributor.authorChoi, Byung Ihn-
dc.date.accessioned2009-10-05T05:56:09Z-
dc.date.available2009-10-05T05:56:09Z-
dc.date.issued2004-07-10-
dc.identifier.citationEur Radiol 15:759–764en
dc.identifier.issn0938-7994 (Print)-
dc.identifier.issn1432-1084 (Electronic)-
dc.identifier.issnhttp://dx.doi.org/10.1007/s00330-004-2375-4-
dc.identifier.urihttps://hdl.handle.net/10371/10084-
dc.description.abstractThe aim of this study was
to investigate the efficacy of bipolar
radiofrequency ablation (RFA) with
the open-perfused electrode and
cooled-wet electrode. Bipolar RF
was applied for 20 min to the ex
vivo bovine liver using either the
Berchtold system with two 16-gauge
open-perfused electrodes (group A,
n=15) or the Radionics system with
two 15-gauge cooled-wet electrodes
(group B, n=15). In both groups, two
electrodes were placed 3 cm apart.
The ablation zone was created by the
RF energy delivered together with
the infusion of 5% hypertonic saline
(2 ml/min). The dimension of the ablation
zone, its shape and the changes
in the impedance and W s of two
groups during the RFA were examined
and documented. The vertical
diameter (Dv) along the probe, the
long-axis diameter (Dl) perpendicular
to the Dv in the longitudinal
plane and the short-axis diameter of
the ablation zone (Ds) in the transverse
plane through the midpoint
between the tips of two probes
were measured. The mean accumulated
energy output in the Radionics
system was higher than in the Berchtold
system (159,887.0±36,423 W s
vs. 87,555.1±86,787 W s). The difference
was statistically significant
(P<0.05). In group A, the impedance
intermittently rose to above 700 Ω
during the RFA in all sessions, which
led to a gradual decrease of the
power output to lower than 30 W.
In group B, on the other hand, the
impedance did not change markedly.
The mean Dv value of the coagulation
necrosis in group B was
significantly longer than in group A
(5.0±0.4 cm vs. 4.3±0.6 cm,
P<0.05). The mean Dl and Ds were
6.7±0.5 cm and 5.0±0.8 cm in group
A, and 6.5±0.8 cm and 5.5±0.7 cm
in group B, respectively (P>0.05).
The data demonstrate that the
cooled-wet electrode generates the
more spherical ablation zone than
the open-perfused electrode. With
approximately doubled power output,
the bipolar RFA with the cooledwet
electrodes induces a larger volume
of tissue coagulation than with
the open-perfused electrodes.
en
dc.language.isoen-
dc.publisherSpringer Verlagen
dc.subjectLiveren
dc.subjectInterventional proceduresen
dc.subjectRadiofrequency ablationen
dc.subjectExperimental studyen
dc.titleBipolar radiofrequency ablation in ex vivo bovine liver with the open-perfused system versus the cooled-wet systemen
dc.typeArticleen
dc.contributor.AlternativeAuthor이정민-
dc.contributor.AlternativeAuthor한준구-
dc.contributor.AlternativeAuthor김세형-
dc.contributor.AlternativeAuthor손규리-
dc.contributor.AlternativeAuthor최승홍-
dc.contributor.AlternativeAuthor최병인-
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College of Medicine/School of Medicine (의과대학/대학원)Radiology (영상의학전공)Journal Papers (저널논문_영상의학전공)
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