Abstract
Two modes of Nd:YAG laser are available for medical and surgical applications. With the continuous wave (CW) mode the power selected is distributed continuously during emission. With the pulsed wave (PW) mode, high power pulses of short duration are delivered at a constant frequency. The duration of the pulses is depending on the selected mean power. From previous published studies it may be assumed that the tissue necrosis and crater induced with the CW mode are deeper than with the PW mode (1,2). The theoretical advantage of the PW mode is therefore better control of the necrosis extension. The aim of this study was to compare, for the same energy levels, the necrosis induced by the two modes of emission of the Nd:YAG laser in the rat liver in vivo
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