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Background: Segment 2/3 (S2/3) resection, which can preserve more residual liver parenchyma, is a feasible alternative to left lateral sectionectomy. However, it is still challenging to perform anatomical S2/3 resection safely and precisely, especially laparoscopically. This study was designed to evaluate the safety and accuracy of the temporary inflow control of the Glissonean pedicle (TICGL) technique combined with indocyanine green (ICG) fluorescence imaging in laparoscopic anatomical S2/3 resection. Patients and methods: A total of 12 patients recruited at Zhujiang Hospital of Southern Medical University from June 2021 to August 2022 were included in the study. All patients underwent ICG fluorescence imaging guided laparoscopic anatomical S2/3 resection. The TICGL technique was used to control the blood inflow of the target segment. The total time used to control the hepatic inflow of the target segment, the time of hemostasis, the amount of intraoperative blood loss, predicted resected liver volume (PRLV) and actual resected liver volume (ARLV) were used to evaluate the simplicity, safety, and accuracy of the TICGL technique combined ICG fluorescent imaging in guiding laparoscopic anatomical S2/3 resection. Results: Of the 12 included patients, 7 underwent S2 resection and 5 underwent S3 resection. The operation time was 76.92 ± 11.95 min, the intraoperative blood loss was 15.42 ± 5.82 ml, and the time of hepatic blood inflow control was 7.42 ± 2.43 min. There was a strong correlation between PRLV and ARLV (r = 0.903, P < 0.05). Conclusion: The combination of the TICGL technique with ICG negative staining fluorescence imaging is a feasible approach for laparoscopic anatomical S2/3 resection. [ABSTRACT FROM AUTHOR]

Background: The regions of the liver with cholestasis caused by biliary tumors or thrombosis can be distinctly identified using indocyanine green (ICG) fluorescence imaging.1 The authors' team reported the application of bile-duct obstructed area imaging (BOAI) to assist open hepatectomy for intrahepatic cholangiocarcinoma (ICC) combined with intrahepatic bile duct obstruction previously.2 This video is the first report of real-time BOAI-guided three-dimensional (3D) laparoscopic hepatectomy using a 3D-4K fluorescence imaging system. Methods: A 65-year-old man was admitted to the authors' institution with clonorchiasis. Preoperative computed tomography (CT) and magnetic resonance cholangiopancreatography (MRCP) showed an obstruction and diffuse dilation of the right hepatic duct. A 15-min retention of ICG (ICG R15) was performed 5 days before the operation, with a 3.3% result. Preoperative planning involved performing laparoscopic right hemi-hepatectomy with regional lymph node dissection assisted by visualization technology.3 During the procedure, significant fluorescence accumulation in the right liver was shown by fluorescence imaging. With the guidance of real-time BOAI (Fig. 1), the regions of biliary obstruction were precisely resected, and the middle hepatic vein (MHV) was passively and adequately exposed on the cutting plane. Results: The histopathologic diagnosis indicated high-grade intraepithelial neoplasia of the right bile duct tumor without lymph node metastases and clonorchiasis. The duration of the operation was 300 min, with an intraoperative blood loss of 50 ml. No postoperative complications occurred, and the patient was discharged after 7 days. Conclusion: Laparoscopic right hemi-hepatectomy for the bile‐duct obstructed area with the guidance of real-time BOAI is feasible and effective. [ABSTRACT FROM AUTHOR]

The propagation velocity and energy of acoustic emission (AE) signals at different moisture contents (MC) of wood are studied, providing a theoretical basis for studying the law of wood stress and strain with the change in MC. The AE source was simulated by lead core fracture on the surface of Pinus massoniana Lamb. Signal de-noising was performed by discrete wavelet decomposition method. On this basis, the propagation velocity and energy of AE signals at different MCs were studied according to the signal cross-correlation analysis and time difference localization method, and the law of velocity and energy change with MC was further determined by fitting. The fitting results show that the propagation velocity of AE signals decreased exponentially with the increase in MC. Moreover, the propagation velocity decreased rapidly when the MC was below fiber saturation point (FSP), and decreased relatively gently when the MC was above FSP. In addition, the energy attenuation of the AE signal was obvious during the propagation process, and the energy attenuation rate of the AE signal presented a linear relationship with the increase in MC. The change in MC has a significant effect on the propagation velocity and energy of AE signals of wood. [ABSTRACT FROM AUTHOR]