目的总结儿童盲肠后位阑尾行腹腔镜切除的体会。方法2019年10月~2024年2月,三孔法腹腔镜阑尾切除术中证实57例盲肠后位阑尾炎。脐正中切口置入5 mm trocar和30°观察镜,下腹正中膀胱上、脐下3~5 cm左侧腹直肌外缘分别置入5 mm troca...目的总结儿童盲肠后位阑尾行腹腔镜切除的体会。方法2019年10月~2024年2月,三孔法腹腔镜阑尾切除术中证实57例盲肠后位阑尾炎。脐正中切口置入5 mm trocar和30°观察镜,下腹正中膀胱上、脐下3~5 cm左侧腹直肌外缘分别置入5 mm trocar和操作钳,探查找到病变阑尾,结扎阑尾根部,电钩顺切和逆切相结合贴近阑尾离断阑尾头端和体部,若阑尾位于侧后腹膜外,需电钩打开侧后腹膜,显露、松解和离断阑尾。结果57例均获成功。手术时间65~120 min,(85.0±10.5)min。术后8~12 h可自行下床活动,术后0.5~2 d恢复排气并进流食,术后住院3~7 d,平均5.5 d。随访1~18个月,平均5.7月,均无切口感染、粘连性肠梗阻、阑尾残株炎、盆腔脓肿等并发症发生。结论盲肠后位阑尾与盲肠壁贴附紧密,手术时间相对较长。可先结扎阑尾根部,贴近阑尾壁离断阑尾,顺切和逆切阑尾相结合灵活操作。阑尾位于腹膜外时先电钩打开侧后腹膜显露阑尾,顺切和逆切相结合离断阑尾。展开更多
The H+NaF reaction is investigated at the quantum state-resolved level using the time-dependent wavepacket method based on a set of accurate diabatic potential energy surfaces.Oscillatory structures in the total react...The H+NaF reaction is investigated at the quantum state-resolved level using the time-dependent wavepacket method based on a set of accurate diabatic potential energy surfaces.Oscillatory structures in the total reaction probability indicate the presence of the short-lived intermediate complex.展开更多
文摘本文基于2001—2021年MODIS NDVI数据和气象数据,利用TIMESAT软件提取伊犁河谷植被物候参数,结合Sen趋势分析、M—K检验和偏相关分析等方法,研究伊犁河谷植被物候变化特征及其对气候(气温、降水)变化的响应。结果表明:伊犁河谷植被生长季始期(Start of the growing season,SOS)、生长季末期(End of the growing season,EOS)、生长季长度(Length of growing season,LOS)主要集中在45~113 d,290~335 d,186~279 d,海拔每上升100 m,SOS约推迟1.9 d,EOS提前1 d,LOS缩短2.9 d。SOS呈提前的像元占79.91%;EOS呈推迟的像元占81.64%;LOS呈延长和缩短的像元占31.89%,26.39%。1000 m以下草原SOS最早且提前天数最多(61.5 d);1000 m以上草原EOS提前天数最多(34.8 d),阔叶林仅提前7.6 d。SOS受2,3月气温及1,2月降水影响,3月气温升高使SOS提前;EOS与8月气温正相关,与9月降水负相关。本研究为伊犁河谷的植被资源保护与生态环境可持续发展提供科学依据。
基金supported by the National Natural Science Foundation of China(Grant Nos.12374226 and 12304273)。
文摘The H+NaF reaction is investigated at the quantum state-resolved level using the time-dependent wavepacket method based on a set of accurate diabatic potential energy surfaces.Oscillatory structures in the total reaction probability indicate the presence of the short-lived intermediate complex.