Objective To study the role of different dose nicorandil in prevention of CIN in elderly CHD patients.Methods One hundred and twenty-one elderly CHD patients were divided into standard dose nicorandil treatment group (n=42),5 mg nicorandil treatment group (n=39) and 10 mg nicorandil treatment group (n=40).Their Scr levels,and eGFR were measured for 3 days before and after PCI.The urine KIM-1 and NGAL levels were measured before and 24 h after PCI.The incidence of CIN and adverse reactions were compared in 3 groups.Results The incidence of (IN and the eGFR ≥25％ were significantly lower,the serum Scr level was significantly lower while the eGFR was significantly higher in 5 mg and 10 mg nicorandil treatment groups than in standard dose nicorandil treatment group on days 1 and 2 after PCI (P＜0.05,P＜0.01).The serum Scr level was significantly lower while the eGFR was significantly higher in 10 mg nicorandil treatment group than in 5 mg nicorandil treatment group on day 2 after PCI (P＜0.05).The urine KIM-1 and NGAL level were significantly lower in 10 mg nicorandil treatment group than in standard dose nicorandil treatment group and 5 mg nicorandil treatment group at 24 h after PCI (2.77±0.33 μg/L vs 5.63±0.27 μg/L,4.82±0.32 μg/L,P＜0.05;41.64±8.42 μg/L vs 66.51±10.72 μg/L,57.11±9.67 μg/L,P＜0.05).Conclusion Different oral doses of nicorandil play a role in prevention of CIN and 10 mg nicorandil plays a greater role than standard dose nicorandil and 5 mg nicorandil in prevention of CIN in elderly CHD patients undergoing PCI.

Objective To establish a new method for the verification of the interior quality control products of Medical Laborato ry by using the quality control data of the two groups to check the quality of the interior quality control products during the verification.Methods Take use of quality control data of HBsAg,HCV-Ab,Syphilis antibody and HIV antibody of two time periods before and after during the period of validity to analyze difference in the two groups before and after data and judge the stability of interior quality control products between the before and after.Results There was no significant difference between the two groups in the data of before and after(P＞0.05),indicating that the control products maintained stability during the process.The difference of the two groups of HBsAg was statistically significant(P＜0.05),indicating that the control product did not maintain good stability during this period,and measures should be taken.Conclusion Make statistical analysis of the mean((x)) and standard deviation(s) calculated from the quality control data obtained from the laboratory quality control,analyzing data whether the differences between the two time periods was statistically significant,so as to achieve internal quality control during product verification purposes

Objective To evaluate the role of endogenous heme oxygenase-1/carbon monoxide ( HO-1/CO) signaling pathway in endoplasmic reticulum stress during endotoxin-induced acute lung injury ( ALI) in rats. Methods Forty healthy clean-grade male Sprague-Dawley rats, aged 8 weeks, weighing 190-210 g, were divided into 4 groups ( n=10 each) using a random number table method: control group (group C), ALI group, ALI plus ZnPP-IX group (group AZ), and ALI plus vehicle sodium bicarbonate group ( group AV) . ALI was induced by intravenously injecting lipopolysaccharide 5 mg/kg in anesthetized rats. At 30 min before establishing the model, ZnPP-IX 10μmol/kg (diluted to 1 ml in 50 mmol/L sodium bicarbonate) was intraperitoneally injected in group AZ, and 50 mmol/L sodium bicarbonate 1 ml was intra-peritoneally injected in group AV. After injecting lipopolysaccharide for 6 h, blood samples were collected from the common carotid artery for determination of plasma CO concentration, the rats were then sacrificed, and lungs were removed for microscopic examination of the pathological changes which were scored and for determination of CO level, wet to dry weight ratio ( W/D ratio) , cell apoptosis ( by TUNEL) , and expres-sion of heme oxygenase-1 ( HO-1) , glucose-regulated protein 78 ( GRP78) , phosphorylated protein kinase R-like endoplasmie reticulum kinase (p-PERK), phosphorylated eukaryotic translation initiation factor 2 alpha ( p-elF2 ) , CCAAT/enhancer-binding protein homologous protein ( CHOP ) and caspase-12 in lung tissues ( by Western blot) . Apoptosis index ( AI) was calculated. Results Compared with group C, the lung injury scores, W/D ratio, AI and CO levels in plasma and lung tissues were significantly increased, and the expression of HO-1, GRP78, p-PERK, p-elF2, CHOP and caspase-12 was up-regulated in the other three groups ( P＜0. 05) . Compared with group ALI, lung injury scores, W/D ratio and AI were sig-nificantly increased, CO levels in plasma and lung tissues were decreased, the expression of HO-1 was down-regulated, and the expression of GRP78, p-PERK, p-elF2, CHOP and caspase-12 was up-regula-ted in group AZ (P＜0. 05), and no significant change was found in the parameters mentioned above in group AV ( P＞0. 05) . Conclusion HO-1/CO signaling pathway produces endogenous protection possibly through inhibiting endoplasmic reticulum stress during endotoxin-induced ALI in rats.

Objective:To observe the emulsification of silicone oil in eyes with rhegmatogenous retinal detachment (RRD) after silicone oil filling surgery, and to preliminarily analyze the possible clinical factors related to it.Methods:A cross-sectional clinical study. From January 2019 to April 2022, 50 eyes of 50 patients with RRD who underwent pans plana vitrectomy (PPV) combined with silicone oil filling surgery in Eye and ENT Hospital of Fudan University were included in the study. Among them, there were 25 males with 25 eyes and 25 females with 25 eyes; the age was 54.86±11.79 years old. The retina was in place 3 months after surgery. Before silicone oil removal surgery, intraocular pressure >21 mm Hg (1 mm Hg=0.133 kPa) or treated with≥1 anti-glaucoma drug (high intraocular pressure) in 20 eyes; intraocular pressure ≤21 mm Hg and no anti-glaucoma drug treatment in 30 eyes (normal intraocular pressure). During follow-up after surgery, silicone oil emulsification was found and those who met the indications for silicone oil removal were subjected to silicone oil removal surgery. The first 2 ml of lavage fluid was collected immediately after removal of the silicone oil, and the particle diameter and number of emulsified silicone oil were measured using a Multisizer ? 3 particle/cell counter and particle size analyzer. The measuring range was 0.4-12.0 μm, and the diameter is accordingly divided into 0.4-<1.0, 1.0-<3.0, 3.0-<5.0, 5.0-<7.0, 7.0-12.0 μm. Each sample was measured 3 times and the average value was taken. Spearman correlation analysis and multiple linear regression analysis were used to analyze the correlation between the number of emulsified silicone oil particles and clinical factors. Results:The number of emulsified silicone oil particles was (1.74±2.94)×10 7/ml (0.96×10 7-14.11×10 7/ml), of which the diameter of 0.4-<1.0 μm emulsified silicone oil particle was (1.25±2.41)×10 7/ml, accounted for (64.26±12.70)% [(1.25±2.41)×10 7/(1.74±2.94)×10 7]. The results of correlation analysis showed that there was no correlation between the total particle number of emulsified silicone oil and various clinical factors ( P>0.05). The number of emulsified silicone oil particles with a diameter of 7.0-12.0 μm was negatively correlated with age ( r=-0.298, P=0.036), and positively correlated with axial length ( r=0.325, P=0.021). There was no correlation between the previous ocular trauma, choroidal detachment and different lens states and the number of emulsified silicone oil particles ( P>0.05). Multiple linear regression analysis showed that eye axis ( β=1 570.868, P=0.023) and age ( β=-316.128, P=0.039) were the risk predictors of silicone oil emulsification into large diameter particles (7-<12 μm). The number of emulsified silicone oil particles with a diameter of 7-12 μm in the patients with high intraocular pressure was significantly higher than that in the patients with normal intraocular pressure, and the difference was statistically significant ( U=195.00, P=0.037). Conclusions:Most of the emulsified silicone oil particles in the eyes of RRD patients after silicone oil filling surgery are small-diameter particles; the silicone oil emulsification is more serious in young patients and patients with long ocular axis, and young patients are more prone to high intraocular pressure.