目的 :探讨并评估颊颈连续曲线切口在颊癌联合根治术中的应用效果。方法 :收集2015年1月-2018年12月收治的颊癌患者87例,其中42例采用颊颈连续曲线切口(实验组),45例采用传统颈部T形切口联合面颊切口(对照组)。评估术野暴露范围,对比2...目的 :探讨并评估颊颈连续曲线切口在颊癌联合根治术中的应用效果。方法 :收集2015年1月-2018年12月收治的颊癌患者87例,其中42例采用颊颈连续曲线切口(实验组),45例采用传统颈部T形切口联合面颊切口(对照组)。评估术野暴露范围,对比2组切口长度、联合根治术所耗时长和术后颈部并发症发生率。随访时间7~43个月,采用改良温哥华瘢痕量表(Vancouver Scar Scale,VSS)及华盛顿大学生存质量问卷(University of Washington Quality of Life,UW-QOL),对2组患者术后瘢痕及生存质量进行评估。采用SPSS 22.0软件包进行统计学分析。结果:实验组切口长度为(36.40±5.08)cm,显著小于对照组的(39.93±5.22)cm(P<0.05);实验组联合根治术所耗时长短于对照组,颈部并发症发生率低于对照组;术后瘢痕评估及生存质量优于对照组,差异均有统计学意义(P<0.05)。2组手术术野显露范围,术后复发、转移率无显著差异。结论:颊颈连续曲线切口与传统切口相比,能获得良好的视野,联合根治耗时短,并能实现原发灶与颈淋巴清扫术整体切除以保证手术彻底性。具有切口短且美观、并发症少、术后生存质量好等优点,是值得推荐的一种颊癌联合根治手术切口。展开更多
In many study fields,scholars have extensively explored the linear relationships between variables.But some recent studies have shown that the linear models sometimes fail to reflect true relationships between variabl...In many study fields,scholars have extensively explored the linear relationships between variables.But some recent studies have shown that the linear models sometimes fail to reflect true relationships between variables and often misguide practice.Therefore,scholars strongly advocate exploring the curvilinear relationships between variables.Drawing on previous studies and the principles of mathematical statistics,this paper combines the linear relationship and the curvilinear relationship and divides the curvilinear relationship into four categories according to the quadratic coefficient of the quadratic curve and the coefficient of the linear model.Meanwhile,according to their characteristics in the economic and management practice,this study names these four types of curvilinear relationships as Gradually Getting Better effect,Too Much of a Good Thing effect,A Little Bad Thing effect or Catfish effect,and Prolonged Illness Makes the Patient a Good Doctor effect,respectively.Then these four types of curvilinear effects are discussed from four aspects in this paper:data analysis methods,theoretical connotation,application examples and theoretical explanation.Finally,the application of these curvilinear effects in future research is outlooked.展开更多
In this study, a vorticity vector-potential method for two-dimensional viscous incompressible rotating driven flows is developed in the time-dependent curvilinear coordinates. The method is applicable in both inertial...In this study, a vorticity vector-potential method for two-dimensional viscous incompressible rotating driven flows is developed in the time-dependent curvilinear coordinates. The method is applicable in both inertial and non-inertial frames of reference with the advantage of a fixed and regular calculation domain. The numerical method is applied to triangle and curved triangle configurations in constant and varying rotational angular velocity cases respectively. The evolutions of flow field are studied. The geostrophic effect, unsteady effect and curvature effect on the evolutions are discussed.展开更多
文摘目的 :探讨并评估颊颈连续曲线切口在颊癌联合根治术中的应用效果。方法 :收集2015年1月-2018年12月收治的颊癌患者87例,其中42例采用颊颈连续曲线切口(实验组),45例采用传统颈部T形切口联合面颊切口(对照组)。评估术野暴露范围,对比2组切口长度、联合根治术所耗时长和术后颈部并发症发生率。随访时间7~43个月,采用改良温哥华瘢痕量表(Vancouver Scar Scale,VSS)及华盛顿大学生存质量问卷(University of Washington Quality of Life,UW-QOL),对2组患者术后瘢痕及生存质量进行评估。采用SPSS 22.0软件包进行统计学分析。结果:实验组切口长度为(36.40±5.08)cm,显著小于对照组的(39.93±5.22)cm(P<0.05);实验组联合根治术所耗时长短于对照组,颈部并发症发生率低于对照组;术后瘢痕评估及生存质量优于对照组,差异均有统计学意义(P<0.05)。2组手术术野显露范围,术后复发、转移率无显著差异。结论:颊颈连续曲线切口与传统切口相比,能获得良好的视野,联合根治耗时短,并能实现原发灶与颈淋巴清扫术整体切除以保证手术彻底性。具有切口短且美观、并发症少、术后生存质量好等优点,是值得推荐的一种颊癌联合根治手术切口。
文摘In many study fields,scholars have extensively explored the linear relationships between variables.But some recent studies have shown that the linear models sometimes fail to reflect true relationships between variables and often misguide practice.Therefore,scholars strongly advocate exploring the curvilinear relationships between variables.Drawing on previous studies and the principles of mathematical statistics,this paper combines the linear relationship and the curvilinear relationship and divides the curvilinear relationship into four categories according to the quadratic coefficient of the quadratic curve and the coefficient of the linear model.Meanwhile,according to their characteristics in the economic and management practice,this study names these four types of curvilinear relationships as Gradually Getting Better effect,Too Much of a Good Thing effect,A Little Bad Thing effect or Catfish effect,and Prolonged Illness Makes the Patient a Good Doctor effect,respectively.Then these four types of curvilinear effects are discussed from four aspects in this paper:data analysis methods,theoretical connotation,application examples and theoretical explanation.Finally,the application of these curvilinear effects in future research is outlooked.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11172069,11472082)
文摘In this study, a vorticity vector-potential method for two-dimensional viscous incompressible rotating driven flows is developed in the time-dependent curvilinear coordinates. The method is applicable in both inertial and non-inertial frames of reference with the advantage of a fixed and regular calculation domain. The numerical method is applied to triangle and curved triangle configurations in constant and varying rotational angular velocity cases respectively. The evolutions of flow field are studied. The geostrophic effect, unsteady effect and curvature effect on the evolutions are discussed.
