排序方式: 共有20条查询结果,搜索用时 237 毫秒
1.
Accuracy and repeatability of direct ciliary sulcus diameter measurements by full-scale 50-megahertz ultrasound biomicroscopy 总被引:2,自引:0,他引:2
Background Phakic intraocular lens (pIOL) implantation has been a popular means for the treatment of high ametropia Measurements of ciliary sulcus diameter is important for pIOL size determining. But till now, no perfect system can directly measure it. The present study was to evaluate the accuracy, repeatability and reproducibility of direct sulcus diameter measurements obtained by a full-scale 50-megahertz (MHz) ultrasound biomicroscopy (UBM). Methods A fresh cadaver human eye with a scale marker inserted through the posterior chamber plane from 3 o'clock to 9 o'clock meridian and 30 randomly selected eyes from 30 normal subjects were scanned by full-scale 50-MHz UBM in horizontal meridional scan plane. The distance between the scales and the whole length of the marker inside the cadaver eye were measured by the same observer using the "built-in" measurement tools and the indicating error of instrument was calculated. Reproducibility of the measurement was evaluated in 30 eyes by 2 operators using Blander and Altman plot test. Repeatability was evaluated from 10 successive eyes randomly selected from the 30 eyes by one operator. Results On a scale of 1 mm, the greatest indicating error was 40μm; the mean largest indicating error of 1 mm scale from the 10 images was (26_±14) μm; on a scale of 11 mm, the greatest indicating error was 70 μm; the error rate was 0.64%. The mean length of the needle inside the eye of the 10 images was 11.05 mm, with the mean indicating error of 47 μm, the average error rate was 0.43%. For ciliary sulcus diameter measurements in vivo, the coefficient of variation was 0.38%; the coefficients of repeatability for intra-observer and inter-observer measurements were 1.99% and 2.55%, respectively. The limits of agreement for intra-observer and inter-observer measurement were -0.41 mm to 0.48 mm and -0.59 mm to 0.58 mm, respectively. Conclusion The full-scale 50-MHz UBM can be a high accuracy and good repeatability means for direct measuring the ciliary sulcus diameter and useful for size determining of posterior chamber pIOL. 相似文献
2.
3.
许恒利 《右江民族医学院学报》1996,18(4):546-547
对30例其他疾病误诊为急性阑尾炎而误作手术进行分析,认为对常见急腹症的诊断重视不够而急于行阑尾切除术、对某些内科疾病引起的急性腹痛缺乏临床经验、对儿童急性腹痛的特点认识不足以及忽视某些妇科疾病与外科急腹症的鉴别是造成误诊的主要原因。对不典型的病例,一方面要求能准确地把握时机,另一方面也要允许有一定的误差率。面对各种急腹症病人,要详细地询问病史,认真细致地进行体格检查,充分利用各种辅助检查,发挥集体智慧,坚持会诊制度,克服主观臆断,进行全面的综合分析,才能作出正确的处理。 相似文献
4.
本文对1995年甘肃省学生体质调研中的复测误差率进行分析和探讨,为今后开展体检工作的质量控制提供科学依据。1资料来源收集1995年5-6月甘肃省学生体质调研复测资料,包括酒泉、天水和临夏等地区及6个大专院核检测队的447份体检复西卡片进行分析。调查对象为汉族7-22岁及东乡族7-18岁男、女学生。复测项目为身高、体重,坐高、胸围,东乡族增加肩宽和盆宽两项。每天在调查对象中随机抽取3%以上的样本进行复测(上下午各半),由原测人员接检测程序和方法重新将形态指标检测一遍,然后将复乌卡与原剧卡对照,并计算检测误差填入第三张卡… 相似文献
5.
6.
7.
目的探讨品管圈活动对降低持续式化疗泵输注误差率的作用效果。方法2015年4月~10月,成立品管圈活动小组,对科室化疗泵输注误差率的现状及影响因素进行分析,并拟定相应对策,按照品管圈活动流程实施对策,并进行效果确认。结果开展品管圈活动后,持续式化疗泵输注误差率由29.6%下降到9.67%。本次活动目标达成率,护士综合能力得到了提高。结论开展品管圈活动能有效提高持续式化疗泵输注的正确使用率,提高护理质量,值得临床推广应用。 相似文献
8.
9.
背景出生性别比是计划生育考核中较敏感的数字,但长期以来,计生统计和卫生统计存在差别。目的利用住院和非住院分娩的出生婴儿登记记录分析出生性别比情况,并比较计生和卫生系统出生性别比的差异,以期为出生性别比综合治理措施提供科学依据。方法采用问卷调查与深入访谈相结合的方法,对某县具有产科资质且开展产科业务的全部医疗机构进行普查,收集新生儿及产妇的相关信息,推算计划外婴儿出生情况以及总体出生性别比情况。结果 T 县医疗机构出生性别比为118.07,考虑非住院分娩出生的影响为118.27,而同期计划生育系统统计的出生性别比为115.73,误差率在2.02%~2.31%之间。结论当地存在明显的性别选择现象;计生统计中存在漏报和误报,男婴的漏报或误报现象明显,需将出生性别比从计生考核中剥离,并定期对计生报告数据的质量进行抽检,建立基于数据质量的奖惩机制,以提高计生数据的真实性。 相似文献
10.
林凤 《预防医学情报杂志》2006,22(2):241-243
目的 选择适合的中和剂检测医疗机构使用中的消毒液,以求准确反映使用中消毒液微生物污染情况。方法 按《消毒技术规范》和GB15981-1995的中和剂选择试验操作。结果 75%乙醇和0.1%新洁而灭用1%卵磷酯+1%吐温-80PBS作为中和剂其误差率分别为6.8%和3.0%,2%戊二醛用0.5%甘氨酸+1%卵磷酯+1%吐温-80PBS作为中和剂其误差率2.2%,0.5%碘伏用0.5%硫代硫酸钠+1%卵磷酯+1%吐温-80PBS作为中和剂其误差率3.2%。结论 用1%卵磷酯+1%吐温-80PBS,0.5%甘氨酸+1%卵磷酯+1%吐温-80PBS,0.5%硫代硫酸钠+1%卵磷酯+1%吐温-80PBS作中和剂对75%乙醇和0.1%新洁而灭,2%戊二醛,0.5%碘伏中和效果较好。 相似文献