Vaporization and coagulation potentials of new electrovaporization devices for transurethral prostatectomy

Christiaan F P van Swol*, Robert J. Hillenius, Remco J. van Vliet, Rudolf M. Verdaasdonk, Tom A. Boon

*Corresponding author for this work

Research output: Contribution to journalConference articleAcademicpeer-review

1 Citation (Scopus)
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Abstract

Recently, transurethral electrovaporization (EVAP) has been introduced as an alternative for transurethral electroresection as treatment for benign prostatic hyperplasia. This new method combines the use of high electrical power with special developed 'EVAP-elements'. Four different EVAP-elements were applied to bovine myocard tissue with constant speed (1-4 mm/s) while constant force (20 gm) was applied. Two different electrosurgical generators, the F40 and F300 (both Valleylab) were used. The output power of the F40 decreases rapidly when the tissue impedance, between EVAP-element and return electrode, increases. The F300 has a built-in impedance feedback loop to remain the output power constant in the high impedance region. When above threshold power all the different EVAP-elements vaporize on average 0.8 ml tissue per track of 5 cm length. Coagulation around the track extended 1-2 mm into the tissue, sufficient for hemostasis. The threshold power for the F300 was lower than with the F40, 175 and 250 W respectively, and depended on translation speed and EVAP-element.

Original languageEnglish
Pages (from-to)1709-1710
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume4
DOIs
Publication statusPublished - 1 Dec 1996
Externally publishedYes
Event18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 1996: Bridging Disciplines for Biomedicine - Amsterdam, Netherlands
Duration: 31 Oct 19963 Nov 1996
Conference number: 18

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