[In vitro study of radiofrequency thermal angioplasty].
We performed some in vitro experiments using a radiofrequency thermal angioplasty instrument. The distribution of heat emitted from the hot tip of the device was evaluated in an agar phantom by thermography and it produced a concentric circular pattern. The temperature of the hot tip was about 290 degrees C when measured by thermocouples in the air. When the RF probe approached perpendicularly to the cadaver arterial wall, a crater with charring and coagulating necrosis was formed. However, when the RF probe traveled parallel to the arterial wall, as in normal practice, it did not seem to perforate the artery. The device could ablate non-calcified atheromatous plaque.
Koyama
T
T
Department of Radiology, Tottori University School of Medicine.
Sawada
S
S
Tanigawa
N
N
Tsutsumi
S
S
Fujihara
Y
Y
Saito
S
S
Katsube
Y
Y
Morioka
N
N
D000800:Angioplasty, Balloon / Q000295:instrumentation*; D004564:Electrocoagulation / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D006801:Humans; D008961:Models, Structural