Intraoperative Ultrasound Elastography Is Useful for Determining the Pancreatic Texture and Predicting Pancreatic Fistula After Pancreaticoduodenectomy

Objectives Pancreatic fistula (PF) is one of the most common complications after pancreaticoduodenectomy (PD). The soft pancreatic texture is known to be an important predictive factor for PF after PD. However, its evaluation is dependent on the sense of touch by the operator during operation, thus not objective. The aim of this study was to investigate the relationship between mean elasticity via intraoperative ultrasound elastography and histological pancreatic hardness, as well as predictive factor of PF after PD. Methods Forty-eight patients who underwent ultrasound elastography during PD and had pancreatic parenchyma histologically evaluated were included. Results Pancreatic fistula was noted in 20 patients. There were significant differences in the histological pancreatic fibrosis rate between soft pancreas group (8.2%) and hard pancreas group (28.4%,P< 0.05) and in the mean elasticity between soft pancreas group (1.94 m/s) and hard pancreas group (3.17 m/s,P< 0.05). The mean elasticity was significantly correlated with pancreatic fibrosis rate (P< 0.05). A multivariate analysis revealed that the mean elasticity of less than 2.2 m/s was a significant predictor of PF after PD (P= 0.003). Conclusions Intraoperative ultrasound elastography could predict pancreatic texture objectively. The mean elasticity of less than 2.2 m/s was a significant predictor of PF after PD.