Comparison of ocular modulation transfer function determined by a ray-tracing aberrometer and a double-pass system in early cataract patients / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The evaluation of retinal image quality in cataract eyes has gained importance and the clinical modulation transfer functions (MTF) can obtained by aberrometer and double pass (DP) system. This study aimed to compare MTF derived from a ray tracing aberrometer and a DP system in early cataractous and normal eyes.</p><p><b>METHODS</b>There were 128 subjects with 61 control eyes and 67 eyes with early cataract defined according to the Lens Opacities Classification System III. A laser ray-tracing wavefront aberrometer (iTrace) and a double pass (DP) system (OQAS) assessed ocular MTF for 6.0 mm pupil diameters following dilation. Areas under the MTF (AUMTF) and their correlations were analyzed. Stepwise multiple regression analysis assessed factors affecting the differences between iTrace- and OQAS-derived AUMTF for the early cataract group.</p><p><b>RESULTS</b>For both early cataract and control groups, iTrace-derived MTFs were higher than OQAS-derived MTFs across a range of spatial frequencies (P < 0.01). No significant difference between the two groups occurred for iTrace-derived AUMTF, but the early cataract group had significantly smaller OQAS-derived AUMTF than did the control group (P < 0.01). AUMTF determined from both the techniques demonstrated significant correlations with nuclear opacities, higher-order aberrations (HOAs), visual acuity, and contrast sensitivity functions, while the OQAS-derived AUMTF also demonstrated significant correlations with age and cortical opacity grade. The factors significantly affecting the difference between iTrace and OQAS AUMTF were root-mean-squared HOAs (standardized beta coefficient = -0.63, P < 0.01) and age (standardized beta coefficient = 0.26, P < 0.01).</p><p><b>CONCLUSIONS</b>MTFs determined from a iTrace and a DP system (OQAS) differ significantly in early cataractous and normal subjects. Correlations with visual performance were higher for the DP system. OQAS-derived MTF may be useful as an indicator of visual performance in early cataract eyes.</p>

Clinical assessment of the effect of intravenous patient controlled intravenous analgesia and epidural patient controlled epidural analgesia in postoperative analgesia / 中华妇产科杂志

Objective To compare the clinical effect and side effect of intravenous patient controlled intravenous analgesia (PCIA) with patient controlled epidural analgesia (PCEA). Methods Two hundred and fourty postoperative patients,who were randomly divided into three groups:group PCIA,group PCEA and control, 80 cases for each group,and the recovery of bowel movement,urinary retention,nausea,vomiting,pruritis,respiratory depression,postpartum hemorrhage,lactation and recovery of uterus were observed after operation. Results Overall patients in two PCA groups were satisfied with the postoperative analgesia. The incidence of urinary retention in group PCIA were significantly lower than that in group PCEA( P 0 05). There were no remarkable differences between two PCA groups and control in the incidence of postartum hemorrhage, lactation and recovery of uterus. Conclusions Both PCIA and PCEA have excellent analgesic effect. PCIA has lower incidence of urinary retention,and has higher sedative incidence compared with PCEA.

Pathogenic Analysis of Pelvic and Peritoneal Abscess and Its Clinical Management / 中华医院感染学杂志

OBJECTIVE To explore the pathogenesis of pelvic and peritoneal abscesses and their clinical(management).METHODS Clinical data of 109 patients with pelvic and peritoneal abscesses between 1999 and 2005 were retrospectively(evaluated).The connection of their pathogenesis,antibiotics choice,and treatment types with(prognoses) was analyzed.RESULTS Pus from all patients was collected and sent to do germ culture and antibiotic susceptibility testing.Seventy five cases were with positive germ culture.The most germs were Escherichia coli and meropenem and amikacin were considered effective.Four cases were relapsed after surgery from 90 cases.(Pelvic) abscess drainage was performed through vagina under B type ultrasound guiding in 9 cases.Conservative treatment was given in 10 cases and no patient died.CONCLUSIONS Pelvic and peritoneal abscesses should be treated early with antibiotic according susceptibility testing to make a choice.And surgery or sufficient abscess drainage can(improve) their prognosis.

The apoptosis of HUVCE cell line induced by L-amino acid oxidase from snake of bungarus fasciatus / 中国病理生理杂志

AIM: To investigate the effect of purifried L-amino acid oxidase (LAO) from bungarus fasciatus snake venom on apoptosis and growth of HUVCE cell line. METHODS: The L-amino acid oxidase was purified by SP-sepharose HP column followed by Heperin-Sepharose (FF) column. The homogeneity of the preparation was examined by SDS-PAGE and the molecular weight of LAO was determined by SDS-PAGE and high performance liquid chromatography (HPLC) gel-filtration. The MTT assay was used to detect the viability of cells. Flow cytometry and laser confocal microscopy were used to identiyfy the cell cycle and apoptotic morphology after cells treated with LAO. RESULTS: An L-amino acid oxidase (BF-LAO) was successfully purified from the venom of bungarus fasciatus. It showed a single band in SDS-PAGE under both reduced and non-reduced conditions. The apparent molecular weight was determined to be 60 kD by SDS-PAGE and 70 kD by HPLC gel filtration. LAO inhibited growth and induced apoptosis of HUVCE cell line in a dose-dependent manner after 12 h incubation, with the 50% inhibitory concentration (IC_ 50 ) being of 2.8 mg/L. Flow cytometry and laser confocal microscope showed a typical apoptotic peak and morphological changes of these cells. CONCLUSION: The L-amino acid oxidase from bungarus fasciatus snake venom could inhibit the HUEVC cell growth and induce the cell apoptosis.