Background/Aims: The aim of this study was to analyze the chronological changes in postoperative complications in surgical ulcerative colitis patients over the past decade in China and to investigate the potential parameters that contributed to the changes. Methods: Ulcerative colitis patients who underwent surgery during 2008–2017 were retrospectively enrolled from 13 hospitals in China. Postoperative complications were compared among different operation years. Risk factors for complications were identified by logistic regression analysis. Results: A total of 446 surgical ulcerative colitis patients were analyzed. Fewer short-term complications (24.8% vs. 41.0%, P=0.001) and more laparoscopic surgeries (66.4% vs. 25.0%, P<0.001) were found among patients who received surgery during 2014–2017 than 2008–2013. Logistic regression suggested that independent protective factors against short-term complications were a higher preoperative body mass index (odds ratio [OR], 0.870; 95% confidence interval [CI], 0.785–0.964; P=0.008), laparoscopic surgery (OR, 0.391; 95% CI, 0.217–0.705; P=0.002) and elective surgery (OR, 0.213; 95% CI, 0.067–0.675; P=0.009). The chronological decrease in short-term complications was associated with an increase in laparoscopic surgery. Conclusions Our data revealed a downward trend of short-term postoperative complications among surgical ulcerative colitis patients in China during the past decade, which may be due to the promotion of minimally invasive techniques among Chinese surgeons.

Objective:To explore the expressions of long non-coding RNA LINC00673 and ISG15 protein in pancreatic cancer and their clinical significances.Methods:The clinical data of 57 patients diagnosed as pancreatic ductal carcinoma (PDAC) at the Affiliated Cancer Hospital of Xiangya Medical College of Central South University from January 2014 to December 2018 were retrospectively analyzed. The relative expressions of LINC00673 in pancreatic cancer tissues and paracancerous normal tissues (within 3 cm from the edge of cancer tissues) were examined by using quantificational reverse transcription-polymerase chain reaction (qRT-PCR). The ISG15 protein expressions in pancreatic cancer tissues and paracancerous normal tissues were examined by using immunohistochemistry. The difference in LINC00673 expression between ISG15 protein positive and negative patients was compared. The correlation between LINC00673 and ISG15 protein expressions in pancreatic cancer was analyzed by Spearman rank correlation analysis. Moreover, the correlations of LINC00673 and ISG15 protein expressions with clinical stage and pathological classification of pancreatic cancer patients were analyzed.Results:The positive expression of ISG15 protein in pancreatic cancer tissues was 40.4% (23/57), which was higher than that in paracancerous normal tissues [15.8% (9/57)] ( χ2 = 7.90, P = 0.004), and the relative expression of LINC00673 in pancreatic cancer tissues was 0.99±0.36, which was lower than that in paracancerous normal tissues (1.26±0.41) ( t = 4.80, P < 0.001). For 23 (40.4%) ISG15-positive patients and 34 (59.7%) ISG15-negative patients, the relative expression of LINC00673 was 0.77±0.46 and 0.45±0.27 ( P < 0.001). Spearman analysis showed that there was a correlation between LINC00673 and ISG15 protein expressions ( ρ = -0.429, P = 0.001). The relative expression of LINC00673 decreased in patients with low differentiated or undifferentiated tumor, vascular invasion and lymph node metastasis (all P < 0.05), but there was no correlation between LINC00673 expression and patients' age, tumor site, preoperative CA199 level, and TNM stage (all P > 0.05); ISG15 protein expression increased in patients with low differentiated or undifferentiated tumor, TNM stage Ⅲ-Ⅳ, vascular invasion and lymph node metastasis (all P < 0.05), but there was no correlation between ISG15 protein expression and patients' gender, age, tumor site, and preoperative CA199 level (all P > 0.05). Conclusions:The expression of LINC00673 in pancreatic cancer is related to vascular invasion, tumor differentiation degree and lymph node metastasis, and the expression of ISG15 in pancreatic cancer is related to vascular invasion, tumor differentiation degree, lymph node metastasis and TNM stage. The combined detection of LINC00673 and ISG15 protein could be a valuable prognostic indicator for pancreatic cancer. The therapies targeting LINC00673 and ISG15 protein signaling pathways are expected to be a potential option for immunotherapy of pancreatic cancer.

Objective:To compare the differences in lung function between sanitation workers and the general population undergoing routine physical examinations, and to analyze the risk factors for restricted airflow and severity of the condition in sanitation workers.Methods:This study is a large cross-sectional study called "Shanxin Respiratory Health Screening for Ten Thousand People". A total of 1 036 sanitation workers (sanitation group) and 6 701 individuals from the general population undergoing routine physical examinations (control group) were selected as the original study subjects from June 2021 to April 2022 (before matching). Both groups underwent pre-bronchodilator lung function tests, and the differences in lung function characteristics between the two groups were compared. The sanitation group also completed a questionnaire survey. Multivariate and ordinal multinomial logistic regression analysis were used to analyze the risk factors for airflow limitation and its severity.Results:A total of 1 027 individuals from the sanitation group and 999 individuals from the control group were included in the study. There were no significant differences in age, gender, height, weight, and body mass index (BMI) between the two groups (all P>0.05). The rate of airflow restriction was significantly higher in the sanitation group compared to the control group (22.88% vs 8.81%, P<0.001). In the sanitation group, there was no statistically significant difference in a self-assessment test for chronic obstructive pulmonary disease (CAT) scores between individuals with airflow restriction (235 cases) and those without airflow restriction (792 cases) [(1.50±2.50) vs (1.15±2.03) points, P=0.084]. There were no statistically significant differences in forced vital capacity (FVC) as a percentage of predicted value (FVC%pred) between the two groups. However, the sanitation group had significantly lower %pred for forced expiratory volume in one second (FEV 1%pred), FVC/FEV 1 ratio (FEV 1/FVC%pred), forced expiratory flow at 50% of FVC (FEF 50%%pred), forced expiratory flow at 75% of FVC (FEF 75%%pred), and maximal mid-expiratory flow (MMEF%pred) compared to the control group (all P<0.05). The rates of abnormal FEF 50%%pred, FEF 75%%pred, and MMEF%pred were significantly higher in the sanitation group compared to the control group (17.62% vs 10.31%, 17.04% vs 10.01%, 27.26% vs 18.41%, all P<0.001). Small airway parameters and the rate of airflow restriction were significantly higher in past and current smokers of the sanitation group compared to never smokers (all P<0.05). Multifactorial analysis showed that high BMI ( OR=0.929, 95% CI: 0.885-0.974) was a protective factor for airflow restriction, while high smoking index was a risk factor ( OR=1.020, 95% CI: 1.011-1.030). Ordered multinomial logistic regression analysis showed that high BMI ( OR=0.925, 95% CI: 0.882-0.971) was a protective factor for the severity of airflow restriction, while high smoking index ( OR=1.020, 95% CI: 1.011-1.029) was a risk factor for the severity of airflow restriction. Conclusions:The incidences of airflow limitation and small airway abnormalities in sanitation workers are higher than that in general physical examination population. High smoking index and low BMI are independent risk factors for airflow limitation and its severity.

Objective To study stress distributions of the cartilage around the hip joint in stress environment of complete gait cycle, and explore the optimal correction angle of bone block in curved periacetabular osteotomy (CPO), so as to provide theoretical references for clinical operation. Methods Based on CT scans from a healthy volunteer and a patient with development dysplasia of hip (DDH), the three-dimensional (3D) model including pelvis and proximal femur was reconstructed. The cortical bone and cancellous bone were distinguished by dividing the masks, and the material attributes were assigned to the finite element model. A total of 100 different postoperative models were obtained by simulating CPO in DDH model, by adjusting lateral center edge angle (LCEA) and anterior center edge angle (ACEA). According to hip joint stresses in complete gait cycle, the model was loaded respectively, and stress changes of normal, preoperative and postoperative acetabular cartilage were analyzed and compared. ResultsThe minimum peak contact stresses of acetabular cartilage of DDH patient at heel landing phase, start phase of single leg support, mid phase of single leg support, end phase of single leg support and double support phase after simulated CPO operation were 5.273, 6.128, 7.463, 6.347, 6.582 MPa, which were decreased by 2.159, 2.724, 2.249, 2.164, 2.119 MPa,respectively, compared with those before operation. The contact area between femoral head and acetabulum was significantly increased after operation, but it was still smaller than that of normal volunteers. Conclusions The optimal correction angle of LCEA and ACEA can be obtained by using finite element method, and the simulation of CPO surgery on different patients is of great significance to improve surgical accuracy and efficiency.

Objective In order to simulate different angles of acetabular blocks that need to be adjusted during operation, the optimal angle was determined through analyzing the contact stress and contact area of cartilage around the hip joint, so as to provide an individual scheme for acetabular osteotomy. Methods The finite element models for development dysplasia of hip (DDH) and normal pelvis were established to investigate morphological characteristics of the acetabulum and the causes of stress concentration. To simulate osteotomy for the DDH model, a total of 20 postoperative osteotomy models were obtained through the combination of different angles for anterior rotation and lateral rotation of acetabular blocks, and the differences in optimal results of the models during simulated one legged-standing were compared and analyzed. Results The maximum contact pressure of acetabular cartilage in normal model was 7.85 MPa. The maximum contact pressure of acetabular cartilage in DDH model was 13.42 MPa. The optimal contact pressure after simulated osteotomy decreased to 8.49 MPa, and the contact distribution was improved more significantly. Conclusions Changing the anterior rotation angle can significantly improve the contact pressure distribution and size, as well as stay away from the preoperative lesion area, which has a positive impact on postoperative outcomes. Personalized osteotomy plan based on actual situation of each patient before the operation is crucial for the surgical effect.

Objective To explore the influence of different model scopes on acetabular stress distribution and optimal osteotomy result in preoperative planning of Bernese acetabular osteotomy. Methods Two patients with hip dysplasia were established according to different model ranges. Model 1 included the affected hip and femur, and Model 2 included the complete pelvis and affected femur. Compare and analyze the acetabular cartilage contact pressure, area and distribution of the two models under single-leg standing conditions, and simulate osteotomy. Results Compared with Model 1 before surgery, Model 2 had higher contact pressure, smaller contact area and closer distribution to the meniscus edge of acetabulum. Compared with 11 postoperative plans, the variation amplitude of contact pressure and the optimal osteotomy angle for Model 1 were all smaller than those of Model 2. Conclusions The preoperative analysis result of the model with affected hip bone and femur would underestimate the degree of stress concentration and misjudge the location of stress concentration, and the obtained optimal osteotomy rotation angle would be relatively small. The research findings provide certain theoretical basis for preoperative planning and modeling of osteotomy.

Objective: To investigate the feasibility and efficiency of three-line relaxation-based group intervention on mental stress management among nursing students. Methods: A total of 224 nursing students were randomly divided into the intervention group in which three-line relaxation training for 12 weeks were delivered together with psychological health education (PHE), and the control group which only delivered PHE. The SelfRating Anxiety Scale (SAS) and the Self Rating Depression Scale (SDS) were used before and after intervention. T-test was used to compare inter-group difference. Results: After 4-week intervention, there’s no significant difference in the score of SAS and SDS between the two groups(P>0.05). After 12-week intervention, average SAS and SDS score of intervention group was significantly decreased compared with before intervention (both P<0.01). After 12-week intervention, no significant changes were observed in the score of SAS and SDS in the control group (both P>0.05). After 4-and 12-week intervention, average score in SAS and SDS of intervention group was significantly lower than that of the control group(P<0.05). Conclusion Three-line relaxation is effective in relieving mental stress of nursing students.

Objective To establish a benign esophageal stricture model and observe the effect of 32P radioactive isotopes on benign esophageal stricture scarring with intracavitary irradiation so as to provide experimental evidence for inhibiting scar hyperplasia and preventing esophageal restenosis after endoscopic dilation for benign esophageal stricture.Methods Benign esophageal stricture models were established in 18 healthy adult rabbits by annular incision and anastomosis.Then the rabbits were randomly divided into control group,hormone group and irradiation group,with six rabbits in each group.On day 2 after surgery,we measured inner diameter of the anastomotic stoma;then the control group received saline intervention,the hormone group was given dexamethasone,and the irradiation group was given 32P radioactive isotopes.The rabbits were observed for two weeks for their general condition and weight.After the intervention,we measured inner diameter of the anastomotic stoma.Liver functions (ALT and AST) were tested again before modeling and after intervention.Then the rabbits were put to death and had tissue in the esophageal stricture area removed for pathological examination and esophageal HE staining.We determined hydroxyproline (HYP) content of esophageal tissue around the anastomotic stoma.Restlts Benign esophageal stricture model was established successfully.After 2 weeks,the rabbits' appetite was obviously diminished in control group and relatively poor in hormone group;obviously improved in irradiation group.The rabbits' weight increased in radiation group compared with the other two groups (P＜0.05).The esophageal inner diameter in irradiation group widened obviously compared with the other two groups (P ＜ 0.05).In irradiation group,the number of fibroblasts decreased obviously,collagen fiber and granulation tissue were not obvious;HYP content was lower than that in the other two groups,and was close to that in a normal esophagus (P＞0.05).ALT and AST did not differ before and after intervention in all groups (P＞0.05).Conclusion ① We can establish benign esophageal stricture model successfully through the surgery.② 32Pradioactive isotopes radiation therapy can be used to prevent early scar formation in esophageal benign stricture,and is superior to dexamethasone therapy.

ObjectiveTo summarizeand the law of lymph node metastases from adenocareinoma of esophagogastric junction ( AEG),analyses the extent of lymphadenectomy for AEG.Methods198 cases of AEG had been retrospectively analyzed from 2006.6.6 to 2010.12.31,and kept detailed record of the operation type、Siewert's type、TNM stage and group of metastatic lymph nodes.ResultsThe thoraco-abdominal two field lymph node dissection had been performed for 198 AEG,the total number of lymph nodes had been dissected was 3069,the average number was 15.50,the number of metastases lymph nodes was 859.In the 198 AEG,132 cases with lymph node positive,The metastatic rate and incidence was 66.67％ and 27.99％,respectively.The manner of the metastasis about 130 cases was station by station and 2 cases was skipping over station,accout for 98.48％ and 1.52％ of all nodes-positive cases,1 case skiped to left gastric and celiac axis and another case skiped to tracheal bifurcation.The location of positive lymph nodes about Siewert Ⅰ and Ⅱ were recorded:tracheal bifurcation(6.25％,3.33％ ) 、lower posterior mediastinum and paraoesophageai(25.00％,14.67％ ),right paracardiac (47.92％,52.00％ ),left paracardiac (31.25％,36.67％ ) 、lesser curvatura(43.75％,43.33％ ),greater curvatura( 27.08％,22.00％ ) 、left gastric and celiac axis( 27.08％,30.00％ ).The lymph nodes metastastic rate of stage T1 + T2 and T3 + T4 were 40.43％,74.83％,respectively,the difference were significantly.The lymph nodes metastastic rate of different tumor length were analyzed,≤ 3cm group were 40.74％,3 ～5cm group were 70.71％ and ≥5cm group were 88.89％,the difference were significantly;but there were no significant difference related to different differentiation grades and different Siewert types.The mediastinal lymph node metastase rates between Siewert Ⅰ (27.08％) and Siewert Ⅱ (14.67％) were significant difference,but the difference were not found in pericardiac lymph nodes.ConclusionSiewert Ⅰ 、Ⅱ AEG trend to metastasized to middle and low mediastinal and pericardiac,the modified left thansthoracic route and two field lymph node dissection maybe suitable to the lymphadenectomy for AEG.