Application of Ultrasonic Microscopy to Evaluation of Electrically Ligated Vessel Tissue

概要

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Electrothermal bipolar vessel sealing devices have been used for the ligation of vessels during surgical procedures. However, unexpected bleeding is still reported, the cause of which is not yet clarified by conventional histopathological analysis. In the present study, ultrasonic microscopy with a central frequency of 80 MHz was applied to evaluate the mechanical properties of ligated vessels. Five arteries and five veins were electrically sealed for 0, 2, 4, 6, and 8 s. The speed of sound in the native adventitia were higher than that in the media. The speed of sound was not correlated with sealing time. However, acoustical inhomogeneity was seen in the sealed vessels. Thus, the acoustical properties of vessels may be affected by the electrothermal effect, and the evaluation of mechanical properties is important for assessing the tissue sealing performance.
2013-07-25