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首页> 外文会议> >Vaporization and coagulation potentials of new electrovaporization devices for transurethral prostatectomy
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Vaporization and coagulation potentials of new electrovaporization devices for transurethral prostatectomy

机译：经尿道前列腺电切术的新型电汽化装置的汽化和凝结潜能

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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 myocardial 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.
机译：最近，经尿道电汽化（EVAP）已被引入作为经尿道电切术的替代方法，作为良性前列腺增生的治疗方法。这种新方法将高功率的使用与专门开发的“ EVAP元件”结合在一起。将四种不同的EVAP元素以恒定速度（1-4 mm / s）施加到牛心肌组织上，同时施加恒定力（20 gm）。使用了两种不同的电外科发生器F40和F300（均为Valleylab）。当EVAP元件和返回电极之间的组织阻抗增加时，F40的输出功率会迅速降低。 F300具有内置的阻抗反馈环路，可在高阻抗区域保持输出功率恒定。当超过阈值功率时，所有不同的EVAP元素在每条5 cm长的轨道上平均蒸发0.8 ml组织。轨道周围的凝结延伸到组织中1-2毫米，足以止血。 F300的阈值功率分别低于F40、175和250 W，并取决于转换速度和EVAP元素。

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