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Mengshu Wang,Guo Li,Yong Liu,Yuanzheng Qiu,Huihong Chen,Wang Liwen,Donghai Huang,Xin Zhang 대한이비인후과학회 2024 Clinical and Experimental Otorhinolaryngology Vol.17 No.2
Objectives. Considerable research has been focused on independent predictors of difficult laryngeal exposure (DLE) duringsuspension laryngoscopy. However, previous studies have yielded inconsistent results and conclusions. Consequently,we performed a meta-analysis of the existing literature with the aim of identifying significant parameters for a stan-dardized preoperative DLE prediction system. Methods. We systematically retrieved articles from the PubMed, Embase, Web of Science, China National Knowledge Infra-structure, and Wanfang databases up to October 2022. Data from eligible studies were extracted and analyzed usingthe R programming language. The effect measures included odds ratios (ORs) with 95% confidence intervals (CIs) fordichotomous variables and mean differences (MDs) with 95% CIs for continuous variables. Results. The search yielded 1,574 studies, of which 18 (involving a total of 2,263 patients) were included. Pooled analysisdemonstrated that patients with DLE during microsurgery tended to be male (OR, 1.73; 95% CI, 1.16–2.57); wereolder (MD, 5.47 years, 95% CI, 2.44–8.51 years); had a higher body mass index (BMI; MD, 1.19 kg/m2; 95% CI,0.33–2.05 kg/m2); had a greater neck circumference (MD, 2.50 cm; 95% CI, 1.56–3.44 cm); exhibited limited mouthopening (MD, −0.52 cm; 95% CI, −0.88 to −0.15 cm); had limited neck flexibility (MD, −10.05 cm; 95% CI, −14.10to −6.00 cm); displayed various other anatomical characteristics; and had a high modified Mallampati index (MMI)or test score (OR, 3.37; 95% CI, 2.07–5.48). Conclusion. We conducted a comprehensive and systematic analysis of the factors relevant to DLE. Ultimately, we identi-fied sex, age, BMI, neck circumference, MMI, inter-incisor gap, hyomental distance, thyromental distance, sternomen-tal distance, and flexion-extension angle as factors highly correlated with DLE.
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Greenly Synthesized Gold-Alginate Nanocomposites Catalyst for Reducing Decoloration of Azo-Dyes
Yun Li,Gang Li,Wei Li,Feng Yang,Huihong Liu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.8
A green synthesis of gold nanoparticles (AuNPs) using aqueous solution of sodium alginate (SA) has been demonstrated in this work. The SA plays the roles of both reducing and stabilizing agent. The surface plasmon resonance (SPR) band of UV-Vis spectrum around 532 nm confirmed the formation of AuNPs. The characterization through high resolution-transmission electron microscopic (HRTEM), energy dispersive X-ray (EDX) spectroscopy and X-ray diffraction (XRD) infer the as-synthesized AuNPs which were spherical in shape with a face cubic crystal (FCC) structure. The results obtained from zeta potential and dynamic light scattering (DLS) suggest the good stability and narrow size distribution of the AuNPs. The size-controlled AuNPs were obtained through adjusting the reaction parameters such as the concentration of SA, pH of the reaction mixture, temperature and the time of incubation. The as-synthesized AuNPs–SA conjugates were employed to prepare AuNPs–SA beads easily based on SA high affinity toward divalent metal ions. The resulting AuNPs–SA beads function as an efficient heterogeneous catalyst in reducing decoloration of azo-dye model compounds, acidic orange 7 (AO7) and reactive orange 5 (RO5), in the presence of sodium borohydride. The reaction rate constants, estimated based on the reduction reactions followed pseudo-first-order kinetics, suggest the high catalytic activity and stability of the AuNPs–SA beads.
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