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An easier method for performing a pancreaticojejunostomy for the soft pancreas using a fast-absorbable suture 被引量:9
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作者 Kenichi Hakamada Shunji Narumi +5 位作者 Yoshikazu Toyoki Masaki Nara Kenosuke Ishido Takuya Miura Norihito Kubo Mutsuo Sasaki 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第7期1091-1096,共6页
AIM: To clarify the usefulness of a new method for performing a pancreaticojejunostomy by using a fast-absorbable suture material irradiated polyglactin 910, and a temporary stent tube for a narrow pancreatic duct wit... AIM: To clarify the usefulness of a new method for performing a pancreaticojejunostomy by using a fast-absorbable suture material irradiated polyglactin 910, and a temporary stent tube for a narrow pancreatic duct with a soft pancreatic texture.METHODS: Among 63 consecutive patients with soft pancreas undergoing a pancreaticoduodenectomy from 2003 to 2006, 35 patients were treated with a new reconstructive method. Briefly, after the pancreatic transaction, a stent tube was inserted into the lumen of the pancreatic duct and ligated with it by a fast-absorbable suture. Another tip of the stent tube was introduced into the intestinal lumen at the jejunal limb, where a purse-string suture was made by another fast-absorbable suture to roughly fix the tube. The pancreaticojejunostomy was completed by ligating two fast-absorbable sutures to approximate the ductal end and the jejunal mucosa, and by adding a rough anastomosis between the pancreatic parenchyma and the seromuscular layer of the jejunum. The initial surgical results with this method were retrospectively compared with those of the 28 patients treated with conventional duct-to-mucosa anastomosis.RESULTS: The incidences of postoperative morbidity including pancreatic fistula were comparable between the two groups (new; 3%-17% vs conventional; 7%-14% according to the definitions). There was no mortality and re-admission. Late complications were also rarely seen.CONCLUSION: A pancreaticojejunostomy using an irradiated polyglactin 910 suture material and a temporary stent is easy to perform and is feasible even in cases with a narrow pancreatic duct and a normal soft pancreas. 展开更多
关键词 PANCREATICOJEJUNOSTOMY Duct-to-mucosa contact method fast-absorbable suture Irradiated polyglactin 910 Pancreatic fistula
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MgYNi合金的结构与快速吸氢动力学 被引量:3
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作者 李永治 翟亭亭 +3 位作者 罗龙 赵增武 张羊换 赵栋梁 《稀有金属》 EI CAS CSCD 北大核心 2019年第3期247-254,共8页
采用真空悬浮熔炼法制备了Mg_(80)Ni_(20), Mg_(77)Y_3Ni_(20)和Mg_(73)Y_7Ni_(20) 3种镁基合金,研究了Y替代Mg对合金微观结构和吸氢动力学的影响,并对快速吸氢动力学数据进行了方程模拟。结果表明, Mg_(80)Ni_(20)合金主要由带状的Mg_... 采用真空悬浮熔炼法制备了Mg_(80)Ni_(20), Mg_(77)Y_3Ni_(20)和Mg_(73)Y_7Ni_(20) 3种镁基合金,研究了Y替代Mg对合金微观结构和吸氢动力学的影响,并对快速吸氢动力学数据进行了方程模拟。结果表明, Mg_(80)Ni_(20)合金主要由带状的Mg_2Ni和层状的Mg+Mg_2Ni共晶组织组成, Y的加入主要形成了分布在共晶基体里的Ni_3Y相,并造成带状的Mg_2Ni相的减少与消失,及Mg-Mg_2Ni共晶组织向针状组织的转变。吸氢后的合金中Ni_3Y相消失,与Mg和H反应,原位形成了Mg_2NiH_4和YH_2相。Y对Mg的替代显著改善了合金的吸氢动力学,尤其是较低温度下和快速吸氢性能。393 K下, Mg_(77)Y_3Ni_(20)能在180 s内吸氢2.35%(质量分数),是Mg_(80)Ni_(20)吸氢量的4倍多。Y的添加改善合金吸氢动力学的原因在于,原位形成的YH_2相增加了氢原子在合金中的扩散通道和晶面数量,缩短了氢原子的扩散时间。通过对现有吸氢动力学模型的比较分析,给出一种选取快速吸氢动力学临界时间节点的方法,并找出可以较好模拟Mg基合金快速吸氢动力学数据的方程。 展开更多
关键词 储氢 MgYNi合金 快速吸氢动力学 模拟方程
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快速高吸油树脂的合成及吸油性能研究 被引量:35
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作者 朱斌 张兵 生辉 《华南理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 1999年第12期100-105,共6页
文中采用分散聚合法合成了甲基丙烯酸高碳链脂肪醇酯共聚树酯,树脂收率可达95%,并对其吸油性能进行了研究,平均吸油倍数对甲苯为20倍,最快饱和吸油时间为105s.此外还研究了单体种类与比例、交联剂种类及用量。
关键词 吸油树脂 甲基丙烯酸酯 分散聚合 吸油性能 合成
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