Objective:Concentrated growth factors (CGF),a new generation of platelet concentrate products,appears to have more abundant growth factors because of its special centrifugation process.However,there are few studies supporting this.This study was designed to evaluate the effect of CGFs in the treatment of Ⅱ ° furcations of mandibular molars.Methods:In the present study,thirty-one Ⅱ ° furcation involvements in twenty mandiblular molars were included and randomly divided into two groups.The furcation involvements in the experimental group were treated with bone graft therapy combined with CGFs,and the furcation involvements in the control group were treated with bone graft therapy alone.The clinical examination and cone beam computed tomography (CBCT) were performed at baseline and 1 year post-surgery for the two groups.The changes of clinical and CBCT data at baseline and 1 year postsurgery were compared between the experimental group and the control group.Results:At baseline,there were no significant differences between the two groups in the probing depth (PD),vertical clinical attachment loss (CAL-V) and horizontal clinical attachment loss (CAL-H):PD (7.36 ± 2.32) mm (the experimental group) vs.(7.53 ±2.06) mm (the control group);CAL-V (8.69 ± 1.65) mm (the experimental group) vs.(8.81 ±1.53) mm (the control group);CAL-H (5.24 ±2.01) mm (the experimental group) vs.(5.35 ±2.14) mm (the control group).At the end of 1 year post-surgery,the clinical parameters of both groups were significantly improved (P ＜ 0.001).For the experimental group,the average vertical attachment gain was (2.78 ± 1.66) mm,and the vertical attachment loss was improved significantly compared with the baseline (P ＜ 0.001);the average horizontal attachment gain was (2.10 ± 1.89) mm,and the horizontal attachment loss were improved significantly compared with the baseline (P ＜ 0.001).Furthermore,the improvement degree of the experimental group was significantly higher than that of the control group (P ＜ 0.001).At baseline,there were no statistical differences in the vertical bone loss (BL-V) or horizontal bone loss (BL-H) between the two groups (P ＞ 0.05):BL-V (5.08 ± 2.17) mm (the experimental group) vs.(5.84 ± 2.65) mm (the control group);BL-H (5.85 ±2.13) mm (the experimental group) vs.(6.01 ±2.27) mm (the control group).At 1 year post-surgery,both groups showed significant radiographic bone gain at vertical and horizontal directions compared with baseline (P ＜ 0.001).For the experimental group,the average vertical radiographic bone gain was (2.20 ± 1.98) mm,the horizontal radiographic bone gain was (2.51 ±2.18) mm,the vertical and horizontal radiographic bone loss were both significantly reduced compared with the baseline (P ＜ 0.001).For the control group,the average vertical radiographic bone gain was (1.89 ± 2.15) mm,the horizontal radiographic bone gain was (1.30 ± 2.47) mm,the vertical and horizontal radiographic bone losses were both significantly reduced compared with the baseline (P ＜ 0.001).And the experimental group showed significantly higher bone gain at vertical and horizontal directions compared with the control group (P ＜ 0.001).Conclusion:Within the limitation of the present study,CGFs showed positive role in the treatment of Ⅱ° furcation involvements of mandibular molars.

Objective To explore the relationship between ERG4 gene overexpression and azole resistance in clinical Candida albicans strains. Methods The National Committee for Clinical Laboratory Standards (NCCLS)M27-A2 broth microdilution method was conducted to evaluate antifungal susceptibility of 34 clinical Candida albicans isolates in vitro. Total RNA was extracted from these Candida albicans strains and transcribed into cDNA. Real-time fluorescence-based quantitative PCR was performed to determine the mRNA expression of ERG4 gene. Statistical analysis was carried out by a two-sample t-test. Results The expression level of ERG4 mRNA was significantly higher in fluconazole-resistant than in -sensitive Candida albicans strains (4.20 ± 2.56 vs. 1.72 ± 1.33, t = 3.99, P < 0.05), higher in itraconazole-resistant than in -sensitive Candida albicans strains (3.60 ± 2.47 vs. 1.66 ± 1.61, t = 3.71, P < 0.05), and higher in voriconazole-resistant than in -sensitive Candida albicans strains (3.99 ± 2.72 vs. 2.07 ± 1.58, t = 2.91, P <0.05). Further more, increased ERG4 mRNA expression was also observed in isolates cross-resistant to all the three azole antifungal agents compared with those susceptible to all of them (4.49 ± 2.73 vs. 1.69 ± 1.82, t = 3.81, P < 0.05). Conclusions The overexpression of ERG4 gene may be associated with cross resistance to fluconazole, itraconazole and voriconazole in clinical Candida albicans strains, but its exact role is expected to be investigated through downregulation of the ERG4 gene.

Objective:To select the animal model more consistent with the pathophysiology of abdominal compartment syndrome (ACS) through the comparative study of the methods of multiple water sacs superimposed compression and gas perfusion.Methods:Ten experimental pigs were randomly divided into two groups ( n = 5): the "constant volume model" (constant volume model group) and the "constant pressure model" (constant pressure model group) of intra-abdominal hypertension. The models were prepared by the method of water sac superposition and pressurization, and artificial pneumoperitoneum respectively. The abdominal pressures of both groups were 25 mmHg (1 mmHg = 0.133 kPa) and observed for 4 hours. The pressure was measured once an hour for 4 hours and the pressure-time curves of the two groups were drawn respectively. The experimental animals were sacrificed 4 hours after modeling. The heart and lung were harvested, and the histopathological changes were observed by hematoxylin-eosin (HE) staining. Results:Two groups of experimental pigs were successfully modeled. The abdominal pressure gradually increased at 0, 1, 2, 3, 4 hours after operation in the constant volume model group (mmHg: 25.0±0, 27.1±0.2, 29.4±0.1, 30.9±0.2, 33.1±0.1), and there was a positive correlation between the abdominal pressure and time (functional equation: Y1 = 25.102 0+1.996 0 X1; R2 = 0.996 2, P = 0.000 1). The abdominal pressure value in the constant pressure model group at 0, 1, 2, 3, 4 hours were maintained 25 mmHg, and there was no linear correlation between the abdominal pressure and time (functional equation: Y2 = 25). HE staining showed that in the constant volume model group, the myocardial fibers were accompanied with hyaline degeneration, significantly reduced transverse lines, part of myocardial fiber atrophy, and visible nuclear aggregation; hemorrhage, chronic inflammatory cell infiltration and inflammatory exudation were found in the lung tissues. In the constant pressure model group, partial atrophy of myocardial fiber, partial hypertrophy, focal hyaline degeneration, disappearance of local striae, hyaline degeneration of myocardial fiber, dilation and congestion of intermyocardial artery were observed. Slight hyperplasia of alveolar epithelium in some areas, heart failure cells, dilation and congestion of bronchi and trachea artery, a large number of red blood cells and uniform light staining substances in lumen were found. Conclusion:After the model was made by the method of multiple water sacs, the pressure of the abdominal cavity continued to increase with the development of the disease, which was in line with the clinical pathological changes of ACS, and was more suitable for making the animal model of the intra-abdominal hypertension.

Neurovascular coupling (NVC) is the basis of neuronal activity and metabolism, and its dysfunction may be closely associated with the occurrence and development of the nervous system diseases. Functional transcranial doppler ultrasonography (fTCD) can evaluate the NVC function. FTCD researches have shown that ischemic stroke, vascular cognitive impairment and other patients have NVC dysfunction. This article reviews the methods of fTCD examination of NVC and its clinical application.

Esophageal cancer (EC) is one of the most fatal cancers worldwide. According to GLOBOCAN 2020, it was estimated that there were 600, 000 new EC cases and 540 000 EC deaths, while nearly half of all newly diagnosed cases of EC and associated deaths worldwide occurred in China. The annual incidence and mortality of EC have been reduced in the last 20 years in China. However, the early symptoms and signs of EC are not easily distinguished and the disease tends to be within the middle and late stage of pathogenesis when identified, leading to its low 5-year survival rate. Therefore, it could help effectively reduce the burden of EC by clarifying its etiology and risk factors, as well as taking preventive and early diagnosis measures. This article reviews the epidemiology, etiology, screening and early diagnosis of EC in China, to provide systematic references for EC prevention and control.

Objective:To analyze risk factors for unfavorable outcomes after recanalization of large vessel occlusion (LVO) in patients with acute ischemic stroke (AIS).Methods:Patients with AIS-LVO who underwent recanalization treatment (including intravenous thrombolysis and endovascular intervention) at the Stroke Unit of Beijing Hospital from August 2018 to January 2022 were consecutively enrolled. According to the modified Rankin Scale (mRS) at 90-day follow-up after recanalization treatment, participants were classified as unfavorable outcomes (mRS>2) and favorable outcomes (mRS≤2). Baseline clinical data of enrolled patients was collected, and step-wise multivariate logistic regression analysis was used to identify independent risk factors for unfavorable outcomes after recanalization in AIS-LVO patients.Results:A total of 212 AIS-LVO patients were enrolled, including 86 females (41.35%), with an average age of 72.9 years. There were 75 patients in the favorable outcome group and 137 patients in the unfavorable outcome group. Compared with the favorable outcome group, the unfavorable outcome group had a higher average age, a higher proportion of females and patients with atrial fibrillation, higher baseline NIHSS, higher systolic blood pressure, and higher blood creatinine and D-dimer levels (all P<0.05). After adjusting for age and atrial fibrillation as confounding factors, multivariate logistic regression analysis showed that female ( OR=2.859, 95% CI: 1.202-6.799, P=0.018), higher baseline NIHSS ( OR=14.417, 95% CI: 6.269-33.158, P<0.001), higher pre-treatment systolic blood pressure ( OR=1.034, 95% CI: 1.015-1.054, P=0.001), higher emergency blood creatinine level ( OR=1.378, 95% CI: 1.105-1.719, P=0.005), and higher D-dimer level ( OR=3.594, 95% CI: 1.290-10.014, P=0.014) were independent risk factors for unfavorable outcomes after recanalization treatment in patients with AIS-LVO. Conclusion:Female, higher NIHSS, higher systolic blood pressure, higher blood creatinine level and D-dimer level are independent risk factors for unfavorable functional outcomes at 90 days after recanalization treatment of large vessel occlusion in patients with acute ischemic stroke.

Objective:To investigate the predictive value of preoperative D-dimer level for futile recanalization (FR) after mechanical thrombectomy (MT) in patients with acute ischemic stroke (AIS).Methods:It was a nested case-control study. A total of 116 patients with large vessel occlusion (LVO) stroke, who underwent successful recanalization (modified Thrombolysis in Cerebral Infarction, mTICI≥2b) after MT at the Stroke Unit of Beijing Hospital from August 2018 to January 2022,were consecutively enrolled, including 72 males (62.1%) with the age of (72.8±13.1) years. According to the 3-month modified Rankin Scale (mRS) score after MT, patients were divided into the meaningful recanalization group (mRS 0-2, n=41) and the futile recanalization group (mRS 3-6, n=75). The baseline clinical data of enrolled patients was collected. Logistic regression analysis was used to identify the independent risk factors for FR after MT in patients with AIS. Receiver operating characteristic (ROC) curve was used to evaluate the predictive value of D-dimer for FR. Results:Multivariate logistic regression analysis showed that high baseline systolic blood pressure (SBP) ( OR=1.038, 95% CI: 1.012-1.065, P=0.004), baseline National Institutes of Health Stroke Scale (NIHSS) score≥12 ( OR=10.157, 95% CI: 3.624-28.470, P<0.001) and high preoperative D-dimer level ( OR=4.536, 95% CI: 1.379-14.922, P=0.013) were independent predictors of FR after MT in AIS patients with LVO. ROC curve analysis indicated a good predictive value of preoperative D-dimer for the occurrence of FR ( AUC=0.733, 95% CI: 0.638-0.829, P<0.05), the optimal cut-off value of D-dimer was 2.65 μg/L(Lg), with the Youden index, sensitivity, specificity and accuracy of 0.435, 53.3%, 90.2% and 66.4%, respectively. Conclusion:High preoperative D-dimer level is an independent predictor of futile recanalization after MT in AIS patients with LVO, which shows good predictive ability for futile recanalization.

【Objective】 To establish a blood quality monitoring indicator system, in order to continuously improve blood quality and standardized management. 【Methods】 Based on the research of literature and standards, and guided by the key control points of blood collection and supply process, the blood quality monitoring indicator system was developed. Through two rounds of Delphi expert consultation, the indicator content was further revised and improved according to expert opinions after six months of trial implementation. The indicator weight was calculated by questionnaire and analytic hierarchy process. 【Results】 A blood quality monitoring indicator system covering the whole process of blood collection and supply was constructed, including five primary indicators, namely blood donation service, blood component preparation, blood testing, blood supply and quality control, as well as 72 secondary indicators, including definitions, calculation formulas, etc. Two rounds of expert consultation and two rounds of feasibility study meeting were held to revise 17 items and the weight of each indicator was obtained through the analytic hierarchy process. After partial adjustments, a blood quality monitoring indicator system was formed. 【Conclusion】 A blood quality monitoring indicator system covering the whole process of blood collection and supply has been established for the first time, which can effectively evaluate the quality management level of blood banks and coordinate blood quality control activities of blood banks in Shandong like pieces in a chess game, thus improving the standardized management level

【Objective】 To objectively evaluate the quality control level of blood testing process in blood banks through quantitative monitoring and trend analysis, and to promote the homogenization level and standardized management of blood testing laboratories in blood banks. 【Methods】 A quality monitoring indicator system covering the whole process of blood collection and supply, including blood donation service, blood component preparation, blood testing, blood supply and quality control was established. The questionnaire Quality Monitoring Indicators for Blood Collection and Supply Process with clear definition of indicators and calculation formulas was distributed to 17 blood banks in Shandong province. Quality monitoring indicators of each blood bank from January to December 2022 were collected, and 31 indicators in terms of blood testing were analyzed using SPSS25.0 software. 【Results】 The proportion of unqualified serological tests in 17 blood bank laboratories was 55.84% for ALT, 13.63% for HBsAg, 5.08% for anti HCV, 5.62% for anti HIV, 18.18% for anti TP, and 1.65% for other factors (mainly sample quality). The detection unqualified rate and median were (1.23±0.57)% and 1.11%, respectively. The ALT unqualified rate and median were (0.74±0.53)% and 0.60%, respectively. The detection unqualified rate was positively correlated with ALT unqualified rate (r=0.974, P<0.05). The unqualified rate of HBsAg, anti HCV, anti HIV and anti TP was (0.15±0.09)%, (0.05±0.04)%, (0.06±0.03)% and (0.20±0.05)% respectively. The average unqualified rate, average hemolysis rate, average insufficient volume rate and the abnormal hematocrit rate of samples in 17 blood bank laboratories was 0.21‰, 0.08‰, 0.01‰ and 0.02‰ respectively. There were differences in the retest concordance rates of four HBsAg, anti HCV and anti HIV reagents, and three anti TP reagents among 17 blood bank laboratories (P<0.05). The usage rate of ELISA reagents was (114.56±3.30)%, the outage rate of ELISA was (10.23±7.05) ‰, and the out of range rate of ELISA was (0.90±1.17) ‰. There was no correlation between the out of range rate, outrage rate and usage rate (all P>0.05), while the outrage rate was positively correlated with the usage rate (r=0.592, P<0.05). A total of 443 HBV DNA positive samples were detected in all blood banks, with an unqualified rate of 3.78/10 000; 15 HCV RNA positive samples were detected, with an unqualified rate of 0.13/10 000; 5 HIV RNA positive samples were detected, with an unqualified rate of 0.04/10 000. The unqualified rate of NAT was (0.72±0.04)‰, the single NAT reaction rate [(0.39±0.02)‰] was positively correlated with the single HBV DNA reaction rate [ (0.36±0.02) ‰] (r=0.886, P<0.05). There was a difference in the discriminated reactive rate by individual NAT among three blood bank laboratories (C, F, H) (P<0.05). The median resolution rate of 17 blood station laboratories by minipool test was 36.36%, the median rate of invalid batch of NAT was 0.67%, and the median rate of invalid result of NAT was 0.07‰. The consistency rate of ELISA dual reagent detection results was (99.63±0.24)%, and the median length of equipment failure was 14 days. The error rate of blood type testing in blood collection department was 0.14‰. 【Conclusion】 The quality monitoring indicator system for blood testing process in Shandong can monitor potential risks before, during and after the experiment, and has good applicability, feasibility, and effectiveness, and can facilitate the continuous improvement of laboratory quality control level. The application of blood testing quality monitoring indicators will promote the homogenization and standardization of blood quality management in Shandong, and lay the foundation for future comprehensive evaluations of blood banks.

【Objective】 To establish an effective quality monitoring indicator system for blood quality control in blood banks, in order to analyze the quality control indicators for blood collection and supply, and evaluate blood quality control process, thus promoting continuous improvement and standardizing management of blood quality control in blood banks. 【Methods】 A quality monitoring indicator system covering the whole process of blood collection and supply, including blood donation services, component preparation, blood testing, blood supply and quality control was established. The Questionnaire of Quality Monitoring Indicators for Blood Collection and Supply Process was distributed to 17 blood banks in Shandong, which clarified the definition and calculation formula of indicators. The quality monitoring indicator data from January to December 2022 in each blood bank were collected, and 20 quality control indicators data were analyzed by SPSS25.0 software. 【Results】 The average pass rate of key equipment monitoring, environment monitoring, key material monitoring, and blood testing item monitoring of 17 blood banks were 99.47%, 99.51%, 99.95% and 98.99%, respectively. Significant difference was noticed in the pass rate of environment monitoring among blood banks of varied scales(P<0.05), and the Pearson correlation coefficient (r) between the total number of blood quality testing items and the total amount of blood component preparation was 0.645 (P<0.05). The average discarding rates of blood testing or non-blood testing were 1.14% and 3.36% respectively, showing significant difference among blood banks of varied scales (P<0.05). The average discarding rate of lipemic blood was 3.07%, which had a positive correlation with the discarding rate of non testing (r=0.981 3, P<0.05). There was a statistically significant difference in the discarding rate of lipemic blood between blood banks with lipemic blood control measures and those without (P<0.05). The average discarding rate of abnormal color, non-standard volume, blood bag damage, hemolysis, blood protein precipitation and blood clotting were 0.20%, 0.14%, 0.06%, 0.06%, 0.02% and 0.02% respectively, showing statistically significant differences among large, medium and small blood banks(P<0.05).The average discarding rates of expired blood, other factors, confidential unit exclusion and unqualified samples were 0.02%, 0.05%, 0.003% and 0.004%, respectively. The discarding rate of blood with air bubbles was 0.015%, while that of blood with foreign body and unqualified label were 0. 【Conclusion】 The quality control indicator system of blood banks in Shandong can monitor weak points in process management, with good applicability, feasibility, and effectiveness. It is conducive to evaluate different blood banks, continuously improve the quality control level of blood collection and supply, promote the homogenization and standardization of blood quality management, and lay the foundation for comprehensive evaluation of blood banks in Shandong.