A New Type of Dibenzoyl Tartaric Acid Selective Electrode Based on Polymer Membrane Containing Calixarene Ionophore

A new type of di benzoyl tartaric acid selective electr ode has been developed. Three double\| arm calixarene derivatives were emp loyed as the neutral ionophores. The poly(vinyl chloride) membrane electrode containing an amide derivative of ca lixarene as the neutral carrier an d a dibutyl phthalate as the plastici zer exhibited the highest sensitivity for dibenzoyl tartaric acid. The slop e of linear portion was 27.8 mV per c oncertration decade. The electrode has a fast response and a long lifetime .

选择性断流术治疗门静脉高压症217例

目的:研究选择性断流术(选择性保留食管旁静脉的断流术)对门静脉高压症临床疗效的影响.方法:1993-01/2007-12收治门静脉高压症患者217例,分为3组:第1阶段(1993-01/1997-12)组27例,第2阶段(1998-01/2002-12)组68例和第3阶段(2003-01/2007-12)组122例,对不同组间食管旁静脉保留率、自由门静脉压变化、临床疗效等进行回顾性对比分析.结果:食管旁静脉的保留率第1阶段组33.3%,第2阶段组88.2%,第3阶段组93.4%,组间差异有统计学意义(P<0.05);与术前比较,3个阶段组术后自由门静脉压差值有统计学意义(F=5.22,P<0.01);术后近期并发症的发生率第1阶段组33.3%,第2阶段组14.7%,第3阶段组13.1%,差异有统计学意义(P<0.05);术后5年生存率从第1阶段组的74.1%,提高到第2阶段的91.2%,差异有统计学意义(P<0.05).结论:选择性断流术能够更有效降低门静脉压力、减少术后近期并发症、提高5年生存率.