Quantitative analysis of paradoxical inward rib cage movement during sleep in children

Paradoxical inward rib cage movement in children is quantified by the labored breathing index (LBI) on the respiratory inductive plethysmography. Labored breathing index during rapid eye movement sleep (REMS) in 59 children without obvious sleep disordered breathing (SDB) declined with age, and decreased to the mature low level at 35 months of age. The LBI was also found to reflect well the severity of SDB. Paradoxical inward rib cage movement, which was quantified by LBI, is concluded to be an important finding in diagnosing SDB in child patients.     

Automatic detection of rapid eye movements by discrete wavelet transform

In order to detect rapid eye movements (REM) automatically, the Discrete Wavelet Transform was applied to each 8-s segment of electrooculogram (EOG) data for 30 min of 8 h of normal sleep. The Haar function was used as an analysing wavelet because this function is similar to the REM waveform. By shifting the phase of the analysing wavelet by pi/4 of the function, 96% of REM could be detected. The artifacts caused by body movements could be detected simultaneously by this method. Computing time required for the detection of REM was only 11 s for 30 min EOG data.     

复方左氧氟沙星滴眼液的研制及临床应用

目的 :研究复方左氧氟沙星滴眼液的制备及质量控制方法 ,并观察其临床疗效。方法 :以左氧氟沙星为主药配伍地塞米松磷酸钠 ,选择磷酸盐作为缓冲剂 ,依地酸二钠作为稳定剂 ,采用紫外分光光度法测定左氧氟沙星的含量。结果 :制剂稳定 ,左氧氟沙星在2～6μg/ml范围内线性关系良好 ;C=26 1780A—1 0838(r=0 9997) ;平均回收率为100 34 % ,RSD=0 44%(n=5)。结论 :制备工艺简单 ,质控方法可靠 ,疗效良好     

双波长分光光度法测定盐酸环丙沙星滴眼液的含量

目的：建立双波长分光光度法测定盐酸环丙沙星滴眼液中盐酸环丙沙星的含量。方法：采用双波长分光光度法，盐酸环丙沙星的测定波长为277nm，参比波长为234.7nm。结果：盐酸环丙沙星的平均回收率为99.81%(RSD=0.94%,R=0.9999)。结论：本法快速，简便，结果准确。     

高效液相色谱法同时测定氯氟滴眼剂中氯霉素和地塞米松磷酸钠的含量

目的 :建立高效液相色谱法同时测定氯氟滴眼剂中氯霉素和地塞米松磷酸钠的含量。方法 :流动相为甲醇 0 .34%磷酸二氢钾 (5 5∶5 0 ) ,流速 1mL·min-1,SpherisorbC18色谱柱 ,检测波长 2 4 0nm。结果 :氯霉素和地塞米松磷酸钠分别在 12 5～10 0 0mg·L-1(r =0 .9992 )、2 5～ 2 0 0mg·L-1(r =0 .9998)内线性关系良好。加样回收率分别为 (10 1.5± 1.93) %、(10 1.0±1.5 9) % (n =3)。日内RSD分别为 0 .6 3% ,0 .5 8% (n =5 ) ,日间RSD分别为 0 .99% ,0 .86 % (n =3)。结论 :该法简单、迅速 ,结果准确可靠。     

Dry eye after LASIK: Comparison of outcomes for Asian and Caucasian eyes

Background : Dry eye is a common complication of LASIK surgery. Our clinical impression was that post‐LASIK dry eye was more problematic for our Asian patients. The aim of this study was to determine if dry eye after LASIK is more prevalent, more sustained and more severe in Asian eyes compared with Caucasian eyes. Methods : This study was based on a retrospective analysis of a clinical database. Data (n = 932 eyes, 932 patients) was collected before and after (week 2 and months 1, 3 and 6) LASIK surgery. Patients were defined as Asian if both parents were of East Asian ethic origin. Assessments included dry eye symptoms, ocular surface staining, tear volume, tear secretion, tear film stability and corneal sensation. Results : Asian eyes had greater ocular surface staining, poorer tear film stability and lower tear volume before LASIK and at all times after LASIK. Dry eye symptoms occurring ‘often or constantly’ were more prevalent at all time points after LASIK in Asian eyes. Chronic dry eye persisting six months or more after LASIK was diagnosed in 28 per cent of Asian eyes and 5 per cent of Caucasian eyes (p < 0.001). Asian patients with chronic dry eye were predominantly female, reported dry eye symptoms, had greater ocular surface staining and lower tear secretion, stability and volume before surgery. After LASIK, Asian eyes had a slower return to pre‐operative values for ocular surface staining, tear volume and corneal sensation. Discussion : The risk of chronic dry eye after LASIK was significantly higher in Asian eyes. Contributing factors could include racial differences in eyelid and orbital anatomy, tear film parameters and blinking dynamics and higher attempted refractive corrections in Asian eyes.     

Comparing the Discriminative Validity of Two Generic and One Disease-Specific Health-Related Quality of Life Measures in a Sample of Patients with Dry Eye

OBJECTIVE: The purpose of this study was to compare the discriminative properties of two generic health-related quality of life (QoL) instruments (SF-36 and EQ-5D) and a newly developed disease-specific patient-reported outcomes instrument (Impact of Dry Eye on Everyday Life (IDEEL)) to distinguish between different levels of dry eye severity. METHODS: Assessment of 210 people: 130 with non-Sjogren's Keratoconjunctivitis Sicca (non-SS KCS), 32 with Sj?gren's Syndrome (SS) and 48 controls; comparison of SF-36, EQ-5D, and IDEEL age-adjusted data by dry eye severity levels. Severity was assessed based on diagnosis (non-SS KCS, SS, control), patient-report (none, very mild, mild, moderate, severe, extremely severe) and clinician-report (none, mild, moderate, severe). RESULTS: Discriminative validity results were consistent for all instruments. Significant differences between severity levels were found with most SF-36 scales (P < 0.05), all EQ-5D scales (P < 0.05), and all IDEEL scales (P < 0.0001), except for Treatment Satisfaction. IDEEL scales consistently outperformed the generic QoL measures regardless of the severity criterion used. Most SF-36 scales outperformed the EQ-5D QoL scale, but the EQ-5D visual analog scale outperformed the SF-36 scales, except for General Health Perceptions. CONCLUSIONS: The disease-specific IDEEL scales are better able to discriminate between severity levels than the majority of the generic QoL scales. Preliminary evidence demonstrates that the IDEEL will be sensitive to QoL changes over time, although further testing in controlled longitudinal studies is needed.     

羊膜移植治疗早期严重眼部烧伤疗效观察

目的 :探讨羊膜移植治疗早期严重眼部烧伤的疗效。方法 :采用我院眼库提供的保存人羊膜移植治疗碱烧伤 10例 (11只眼 ) ,酸烧伤 7例 (8只眼 ) ,热烧伤 9例 (9只眼 )。结果 :18只眼脱盲 ,其中 12只眼视力 >0 1,12只眼角膜恢复透明 ,14只眼角膜无新生血管 ,2只眼轻度睑球粘连 ,羊膜无免疫排斥、继发感染 ,眼表稳定。结论 :羊膜移植治疗早期严重眼部烧伤获得良好的治疗效果。     

姜黄素对培养的人胚胎视网膜色素上皮细胞增殖活性的影响

目的:研究姜黄素(curcumin,CUR)对培养人胚胎视网膜色素上皮(human fetal retinal pigmentepithelium,hfRPE)细胞增殖的影响。方法:用不同浓度CUR(2.5,5,10,20μg／ml)处理传代培养的hfRPE细胞24~48 h,采用MTT法和流式细胞术观察药物对hfRPE细胞增殖和细胞周期的影响。结果:CUR可明显抑制hfRPE细胞增殖,24、48 h的半数抑制浓度(IC50)分别为14.27μg／ml和12.7μg／ml;流式细胞仪分析表明姜黄素将hfRPE细胞阻滞在G2／M期。结论:在一定浓度范围内,姜黄素通过改变hfRPE细胞的周期分布来抑制其增殖。     

干眼模型的建立方法及评价

干眼是一类非常常见的眼表疾病，理想的干眼模型对于干眼的研究具有重要的价值。目前，已有多种建立干眼动物模型的方法，如通过药物作用、改变动物性激素分泌水平、去除泪腺或眼表的神经支配、诱导泪腺产生自身免疫反应、手术摘除泪腺及手术封闭睑板腺开口等均可制作出干眼模型。这些干眼模型归纳起来主要有泪液缺乏型干眼及蒸发过强型干眼两大类型。常用于制作干眼模型的动物主要有兔、狗及鼠等，此外，还有使用猫、恒河猴、貂及马等制作干眼模型的报道。对几种常见的干眼模型的制作方法及其优缺点作一简要的综述。