Hiline硬性透气性接触镜矫治圆锥角膜的临床观察

目的:观察Hiline硬性透气性接触镜(Hiline RGPCL)矫治圆锥角膜的临床应用效果,并对RGPCL基弧的预测指标进行分析。方法:在角膜地形图指导下,选取圆锥角膜患者36例57眼验配Hiline RGPCL,并按相关标准分为轻度组10眼,中度组24眼,重度组23眼。评估镜片配适状态,比较框架眼镜和Hiline RGPCL最佳矫正视力,并根据角膜曲率指标分析RGPCL基弧的预测性指标。结果:所有患者均能通过Hiline RGPCL获得满意的矫正视力,各组Hiline RGPCL与框架眼镜矫正视力比较差异有统计学意义(轻度组为t=-2.968,P=0.016,中度组为t=-6.293,P<0.01,重度组为t=-12.792,P<0.01)。平均RGPCL基弧为6.8±0.75,RGPCL基弧与角膜曲率具有相关性,其中轻度组RGPCL基弧与陡K值(Sim K steep)具有相关性(r=0.715,P=0.02),中度组RGPCL基弧与平均K值(Average K)及较平均K值陡0.2mm K值均具有相关性(r=0.495,P=0.014),重度组RGPCL基弧与角膜曲率各项指标均有相关性,其中角膜中央曲率相关性最强(r=0.802,P<0.01)。结论:在角膜地形图指导下,圆锥角膜患者验配Hiline RGPCL可以获得满意的矫正视力,并且通过不同预测性指标的选择有助于提高验配效率,值得在临床上推广应用。

Comparison of Pentax HiLine and Olympus Lucera systems at screening colonoscopy

AIM:To compare the performance characteristics of Pentax HiLine(PHL)(with i-scan) and Olympus Lucera(OL) systems in a screening population.METHODS:Screening colonoscopies in asymptomatic guaiac faecal occult blood test-positive patients with PHL(n = 58) and OL(n = 425) colonoscopes were analysed.All procedures were performed by a single colonoscopist.PHL used white-light endoscopy(WLE) on scope insertion and contrast/surface enhancement(i-scan 1) on withdrawal,and OL utilised WLE both on insertion and withdrawal.Patient age,sex,instrument insertion and withdrawal times,nurse assessed patient comfort scores,midazolam and fentanyl doses,procedure completion and rates of lesion detection were recorded separately for each group.Comparisons between the groups were made using either Fisher's exact test(for dichotomous variables) or Mann-Whitney U test(for ordinal and continuous variables).RESULTS:Colonoscopy completion rates were similar in both groups:413/425(97.2%) for OL and 55/58(94.9%) for PHL(P = 0.24).For complete colonoscopies,the two groups were well matched for age,sex,colonoscope insertion times(mean 11.1 min in OL vs 11.6 min in PHL,P = 0.93) and normal colonoscopy withdrawal times(mean 15.6 min in OL vs 14.7 min in PHL,P = 0.2).Patients in the PHL group experienced a small increase in discomfort(mean patient comfort scores were 0.49 in the OL and 0.95 in the PHL group,P < 0.0001).While Fentanyl doses required were similar between groups(mean 57.5 μg in OL vs 61.4 μg in PHL,P = 0.13),slightly more Midazolam was required in the PHL group(mean 2.1 mg in OL vs 2.4 mg in PHL,P = 0.035).There was no difference in polyp(58% in OL vs 67% in PHL) or adenoma(49% in OL vs 56% in PHL) detection rates between the groups.Neither the total number of polyps and adenomas,nor the characteristics of these(including size,location or presence of advanced features) were different between the two systems.CONCLUSION:This study suggests that there is no advantage of either colonoscope system in lesion detection.

麦格夫卷筒纸胶印机介绍

麦格夫公司制造多种型号的报纸轮转胶印机,以及8页或16页热固型商业轮转胶印机和单张纸多色胶印机。其次固型产品系列包括印刷速度为20000～45000张/小时的各种型号的报纸轮转胶印机。采用塔式结构的HILINE 45是最新推出的产品印刷速度可达到45000张/小时,该机在Drupa 2000上展出并做了现场演示。