11 research outputs found
Characteristics of retinal microcirculation after phacoemulsification and factors affecting visual acuity
AIM:To investigate the changes of retinal microcirculation after phacoemulsification and the influencing factors of visual acuity.METHODS: Retrospective analysis. A total of 264 cataract patients(264 eyes)who underwent phacoemulsification in our hospital from January 2022 to December 2022 were selected as the study objects. Patients were divided into < 0.3 group(66 eyes)and ≥0.3 group(198 eyes)according to the recovery of best corrected visual acuity(BCVA)at 3 mo after surgery. The changes of retinal microcirculation indexes were compared before and after treatment. Logistic regression and LASSO regression models were used to screen the influencing factors of postoperative BCVA. A nomogram prediction model of postoperative BCVA was constructed and verified. A restricted cubic spline Logistic regression model was established to analyze the dose-response relationship between end-diastolic velocity(EDV), peak systolic velocity(PSV)and the risk of BCVA recovery.RESULTS: At 3 mo postoperatively, EDV and PSV were significantly improved compared with those before treatment, and resistance index(RI)levels were significantly lower than those before treatment(all P<0.05). Preoperative EDV, PSV, aqueous humor cell grade, fundus lesion grade, advanced age and Emery grade were influencing factors for poor BCVA recovery after phacoemulsification in cataract patients(P<0.05). The AUC before and after validation of the nomogram model by Bootstrap method were 0.869(95%CI: 0.815-0.903)and 0.866(95%CI: 0.802-0.895), respectively. The sensitivity was 88.36% and 88.27%, and the specificity was 91.82% and 91.78%, respectively. Restricted cubic spline model analysis showed no nonlinear dose-response relationship between EDV and PSV levels and the risk of poor BCVA recovery in either male or female(P>0.05).CONCLUSION: After phacoemulsification, retinal microcirculation in cataract patients improved significantly. EDV, PSV, aqueous humor cell grade, fundus lesion grade, advanced age and Emery grade are all factors influencing poor BCVA recovery after cataract surgery
Ag-Doped ZnIn<sub>2</sub>S<sub>4</sub> Nanosheets on Hollow Co<sub>9</sub>S<sub>8</sub> Polyhedral Nanocages as Photocatalysts for Enhanced Hydrogen Production and Pollutant Reduction
The
effective combination of two metallic sulfides to form a heterojunction
and regulate semiconductor structure can significantly improve the
response of photocatalysts under visible light. In this study, we
have successfully grown Ag-doped ZnIn2S4 nanosheets
randomly on carefully designed hollow Co9S8 polyhedral
nanocages to construct the Co9S8/Ag:ZnIn2S4 heterojunction. The optimized 1.0 wt % Co9S8/Ag:ZnIn2S4 heterostructure
shows excellent activity with the H2 generation rate of
1947.7 μmol g–1 h–1, which
is 1.58 times greater than the Ag:ZnIn2S4 (1232.0
μmol g–1 h–1). However,
pure Co9S8 has a narrow band gap but almost
no response in visible light due to the fast photogenerated carrier
recombination rate. The degradation trend of methyl orange (MO) in
all as-prepared samples is the same as that of hydrogen production.
The compound with the Co9S8 mass fraction of
1.0 wt % has the fastest degradation rate and can completely degrade
MO within 16 min. In addition, the Co9S8/Ag:ZnIn2S4 heterostructure has also shown long-term stability
after 20 photocatalytic hydrogen evolution and MO degradation cycle
experiments, respectively. This work highlights the significance of
improving the photocatalytic performance by modulating the morphology
of metallic semiconductors and constructing heterostructures