Deformation During the Electrosurgical Vessel Sealing Process

作者：Wyatt H L^*; Pullin R; Yang T H J; Evans S L

来源：STRAIN, 2016, 52(5): 372-379.

DOI：10.1111/str.12197

• blood vessels
• DIC
• electrosurgery
• strain

Electrosurgical vessel sealing is used throughout many surgical procedures with the benefits of the device widely reported. However, there is still significant variation in the quality of the resulting seal with limited understanding as to why. This study developed a methodology to use digital image correlation to capture the sealing process and to investigate the changes occurring throughout. Porcine carotid arteries were used throughout the study, with seals created using the Gyrus G400 generator and the PKS Open Seal device (Gyrus Medical Ltd, Cardiff, United Kingdom). The displacement across the surface of the blood vessel and the device jaws was measured, and the true maximum principal strain was computed. There was significant contraction of the tissue along the length of the blood vessel, with this occurring in pulses due to the waveform used to deliver the current. Additionally, there was a significant change in displacement between the device jaws (0.08mm), a novel finding of the study. This change in displacement is indicative of a change in application force throughout sealing, which can have significant implications in the quality of the seal, and therefore the findings of this study can influence future device design.

• 出版日期2016-10