http://dx.doi.org/10.1007/s10103-010-0780-2
scopus: cited 4 times
web of science: cited 3 times
The heat-pipe resembling action of boiling bubbles in endovenous laser ablation
November 2010
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Endovenous laser ablation (EVLA) produces boiling bubbles emerging from pores within the hot fiber tip and traveling over a distal length of about 20 mm before condensing. This evaporation-condensation mechanism makes the vein act like a heat pipe, where very efficient heat transport maintains a constant temperature, the saturation temperature of 100°C, over the volume where these non-condensing bubbles exist. During EVLA the above-mentioned observations indicate that a venous cylindrical volume with a length of about 20 mm is kept at 100°C. Pullback velocities of a few mm/s then cause at least the upper part of the treated vein wall to remain close to 100°C for a time sufficient to cause irreversible injury. In conclusion, we propose that the mechanism of action of boiling bubbles during EVLA is an efficient heat-pipe resembling way of heating of the vein wall.
- bubble
- laser
- vein wall
- fiber tip
- temperature
- fiber
- 20 mm
- endovenou
- mechanism
- 100 c
- endovenous laser ablation
- ablation
- saturation temperature
- heat transfer
- action
- van den bos
- volume
- vapor
- transfer
- process
