Objective To construct a swallowing dynamic model for simulating dysphagia caused by reduced tongue movement am-plitude.Methods A swallowing dynamic model was established based on medical imaging data from CT and videofluoroscopic swallowing study(VFSS).The finite element method was used to simulate soft tissues,while the smoothed parti-cle hydrodynamics method(SPH)was used to simulate bolus.The model's posture at each time point was com-pared with the imaging data of VFSS from twelve patients with dysphagia,and a normalization method was used for quantitative evaluation of the model's validity.By adjusting the tongue movement amplitude under different viscosity conditions,the role of tongue movement in the swallowing process was investigated,and the swallow-ing safety and efficiency were assessed.Results The tongue posture and bolus trajectory presented by the swallowing dynamic model were consistent with the VFSS imaging.The brightness in the epiglottis area in VFSS images correlated with the equivalent brightness of SPH particles in the simulation results(r=0.97).As the tongue movement amplitude reducing by 20%,the num-ber of aspirated particles,swallowing efficiency and the average velocity of bolus particles in the oropharyngeal cavity all performed well.Pudding-like fluids exhibited favorable swallowing characteristics even when tongue movement amplitude reducing significantly.Conclusion The swallowing dynamic model can simulate the human swallowing process,providing good support for re-habilitation training of patients with dysphagia and the development of specialized medical foods,demonstrating significant potential for clinical applications.

Objective To construct a swallowing dynamic model for simulating dysphagia caused by reduced tongue movement am-plitude.Methods A swallowing dynamic model was established based on medical imaging data from CT and videofluoroscopic swallowing study(VFSS).The finite element method was used to simulate soft tissues,while the smoothed parti-cle hydrodynamics method(SPH)was used to simulate bolus.The model's posture at each time point was com-pared with the imaging data of VFSS from twelve patients with dysphagia,and a normalization method was used for quantitative evaluation of the model's validity.By adjusting the tongue movement amplitude under different viscosity conditions,the role of tongue movement in the swallowing process was investigated,and the swallow-ing safety and efficiency were assessed.Results The tongue posture and bolus trajectory presented by the swallowing dynamic model were consistent with the VFSS imaging.The brightness in the epiglottis area in VFSS images correlated with the equivalent brightness of SPH particles in the simulation results(r=0.97).As the tongue movement amplitude reducing by 20%,the num-ber of aspirated particles,swallowing efficiency and the average velocity of bolus particles in the oropharyngeal cavity all performed well.Pudding-like fluids exhibited favorable swallowing characteristics even when tongue movement amplitude reducing significantly.Conclusion The swallowing dynamic model can simulate the human swallowing process,providing good support for re-habilitation training of patients with dysphagia and the development of specialized medical foods,demonstrating significant potential for clinical applications.

Objective:To understand the occupational burnout status of tuberculosis prevention and treatment medical staff in Beijing, and analyze the influencing factors of different degrees of occupational burnout.Methods:From April to May 2021, an anonymous questionnaire survey was conducted among the medical staff of tuberculosis prevention and control in Beijing and 16 districts under its jurisdiction. A total of 313 questionnaires were issued, 311 were recovered, and 311 were valid, with an effective recovery rate of 99.36%. The General Information Questionnaire and Maslach Burnout Inventory Generalized Scale (MBI-GS) were used to collect social demographic data and the occurrence of occupational burnout, analyze the occurrence degree of occupational burnout, and identify the influencing factors of the occurrence degree of occupational burnout by using the orderly multiple logistic regression model.Results:Among 311 tuberculosis prevention and control medical staff, the total detection rate of occupational burnout was 62.70% (195/311), and the detection rates of mild, moderate and severe occupational burnout were 22.19% (69/311), 38.59% (120/311) and 1.93% (6/311), respectively. Orderly multiple logistic regression analysis showed that medical staff in prevention and control positions ( OR=1.616, 95% CI: 1.030-2.534, P=0.037) and not meeting expectations for title promotion ( OR=2.969, 95% CI: 1.675-5.262, P<0.001), and not getting along well with colleagues ( OR=2.177, 95% CI: 1.362-3.480, P=0.001) were the main factors affecting the occurrence and severity of occupational burnout among tuberculosis prevention and treatment medical staff. Conclusion:The main manifestations of tuberculosis prevention and control medical staff in Beijing are mild to moderate occupational burnout. It is suggested to pay attention to the occupational needs of different positions of tuberculosis prevention and control medical staff, cultivate professional achievement, carry out psychological counseling, and reduce the degree of occupational burnout.

Objective:To understand the occupational burnout status of tuberculosis prevention and treatment medical staff in Beijing, and analyze the influencing factors of different degrees of occupational burnout.Methods:From April to May 2021, an anonymous questionnaire survey was conducted among the medical staff of tuberculosis prevention and control in Beijing and 16 districts under its jurisdiction. A total of 313 questionnaires were issued, 311 were recovered, and 311 were valid, with an effective recovery rate of 99.36%. The General Information Questionnaire and Maslach Burnout Inventory Generalized Scale (MBI-GS) were used to collect social demographic data and the occurrence of occupational burnout, analyze the occurrence degree of occupational burnout, and identify the influencing factors of the occurrence degree of occupational burnout by using the orderly multiple logistic regression model.Results:Among 311 tuberculosis prevention and control medical staff, the total detection rate of occupational burnout was 62.70% (195/311), and the detection rates of mild, moderate and severe occupational burnout were 22.19% (69/311), 38.59% (120/311) and 1.93% (6/311), respectively. Orderly multiple logistic regression analysis showed that medical staff in prevention and control positions ( OR=1.616, 95% CI: 1.030-2.534, P=0.037) and not meeting expectations for title promotion ( OR=2.969, 95% CI: 1.675-5.262, P<0.001), and not getting along well with colleagues ( OR=2.177, 95% CI: 1.362-3.480, P=0.001) were the main factors affecting the occurrence and severity of occupational burnout among tuberculosis prevention and treatment medical staff. Conclusion:The main manifestations of tuberculosis prevention and control medical staff in Beijing are mild to moderate occupational burnout. It is suggested to pay attention to the occupational needs of different positions of tuberculosis prevention and control medical staff, cultivate professional achievement, carry out psychological counseling, and reduce the degree of occupational burnout.

BACKGROUND: Since the popularization of computed tomography (CT) technology, the detection rate of pulmonary ground glass nodules (GGNs) with imaging follow-up as the main management method has increased significantly. The purpose of this study is to quantitatively analyze the changes of pulmonary GGNs during the follow-up process with three-dimensional reconstruction technology, explore the natural progression of pulmonary GGNs, and provide effective basis for clinical guidance for patients to conduct reasonable management of nodules. METHODS: A total of 115 cases of pulmonary GGNs with regular follow-up in the Combined Outpatient Department of Zhoushan Hospital from March 2015 to November 2022 were enrolled. Quantitative imaging features of nodules were extracted by semi-automatic segmentation of 3D Slicer software to evaluate the growth of nodules and clinical intervention during follow-up. RESULTS: The average baseline age of the patients was (56.9±10.1) yr. The mean follow-up time was (48.8±18.9) months. The two-dimensional diameter of baseline CT scan was (7.9±2.9) mm, and the maximum three-dimensional diameter was (10.1±3.4) mm. The two-dimensional diameter of the last CT scan was (9.9±4.7) mm, and the maximum three-dimensional diameter was (11.4±5.1) mm. A total of 27 cases (23.5%) showed an increase during follow-up, with a median volume doubling time of 822 days and a median mass doubling time of 1,007 days. 32 cases were surgically resected, including 6 cases of invasive adenocarcinoma (IAC), 16 cases of minimally invasive adenocarcinoma (MIA), 8 cases of adenocarcinoma in situ (AIS) and 2 cases of atypical adenomatous hyperplasia (AAH). Five nodules underwent surgical intervention due to the progression of two-dimensional diameter, which was pathologically confirmed as pre-invasive lesions, but their three-dimensional maximum diameter showed no significant change. Nodular morphology, lobulated sign, spiculated sign and vacuole signs all promoted the growth of nodules in univariate analysis. There were significant differences in age, baseline diameter, mean CT value, median CT value, 10% and 90% percentile CT number between the growth group and the stable group (P<0.05). Multivariate Logistic regression analysis showed that age and average CT value were risk factors for nodule growth (P<0.05). Receiver-operating characteristic (ROC) curve analysis results indicated that the age ≥63 years old, the baseline three-dimensional maximum diameter ≥9.2 mm, and the average CT value ≥-507.8 HU were more likely to accelerate the growth of GGNs. The maximum three-dimensional diameter ≥14.4 mm and the average CT value ≥-495.7 HU may be a higher malignant probability. CONCLUSIONS GGNs show an inert growth process, and the use of three-dimensional measurements during follow-up is of greater significance. For persistent glass grinding nodules ≥63 years old, the baseline three-dimensional maximum diameter ≥9.2 mm, and the average CT value ≥-507.8 HU are more likely to increase. However, most nodules still have good prognosis after progression, and long-term follow-up is safe.
Humans ; Middle Aged ; Lung Neoplasms/pathology* ; Imaging, Three-Dimensional ; Neoplasm Invasiveness ; Retrospective Studies ; Multiple Pulmonary Nodules/pathology* ; Adenocarcinoma/pathology*

Objective:To investigate the correlation between stress hyperglycemia ratio (SHR) and poor outcome of successful recanalization after endovascular treatment in patients with acute ischemic stroke.Methods:From January 2019 to October 2022, patients with acute ischemic stroke received endovascular treatment and successful recanalization in the Second People’s Hospital of Lianyungang were included retrospectively. SHR was defined as the fasting blood sugar and glycosylated hemoglobin ratio. At 90 d after procedure, the outcome of patients was evaluated using the modified Rankin Scale score. 0-3 was defined as good outcome, and >3 was defined as poor outcome. Multivariate logistic regression analysis was used to determine the independent risk factor for poor outcome. Receiver operating characteristic (ROC) curve was used to evaluate the predictive value of SHR for 90 d poor outcome in patients with successful recanalization after endovascular treatment.Results:A total of 159 patients were enrolled, including 98 males (61.6%), aged 69.8±8.9 years old. The baseline National Institutes of Health Stroke Scale (NIHSS) score was 12.6±4.3, and SHR was 1.17±0.46. One hundred and five patients (66.0%) had good outcome, while 54 (34.0%) had poor outcome. There were statistically significant differences in SHR, fasting blood glucose, glycosylated hemoglobin, baseline NIHSS score and the proportion of patients with poor collateral circulation and symptomatic intracranial hemorrhage between the poor outcome group and the good outcome group (all P<0.05). Multivariate logistic regression analysis showed that SHR was an independent predictor of poor outcome (odds ratio 2.254, 95% confidence interval 1.136-4.278; P<0.001). The ROC curve analysis showed that the area under the curve of SHR for predicting poor outcome was 0.726 (95% confidence interval 0.648-0.804; P<0.001), which was higher than fasting blood glucose and glycosylated hemoglobin. The optimal cutoff value for SHR was 1.21, and the sensitivity and specificity for predicting poor outcomes were 66.23% and 75.82%, respectively. Conclusion:SHR is associated with the poor outcome of successful recanalization after endovascular treatment in patients with acute ischemic stroke and can be used as a potential predictor.

Objective:To investigate the application value of cystic plate approach (CPA) for extrahepatic right hepatic pedicle dissection in minimally invasive anatomical hepatectomy (MIALR).Methods:The retrospective cohort study was conducted. The clinicopathological data of 42 patients with primary liver cancer who underwent laparoscopic right hemi-hepatectomy in Nanfang Hospital of Southern Medical University from August 2020 to August 2022 were collected. There were 36 males and 6 females, aged (55±13)years. Of the 42 patients, 25 cases undergoing CPA for extrahepatic right hepatic pedicle dissection were divided into the CPA group, and 17 cases undergoing traditional approach for extrahepatic right hepatic pedicle dissection were divided into the traditional approach group. Observation indicators: (1) surgical situations; (2) postoperative situations. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the t test. Measurement data with skewed distribution were represented as M( IQR), and comparison between groups was conducted using the Mann?Whitney U test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi?square test or Fisher exact probability. Comparison of ordinal data was conducted using the non‐parameter rank sum test. Results:(1) Surgical situations. All patients in the two groups underwent laparoscopic right hemi-hepatectomy successfully, with the surgical margin as negative. The operative time, volume of intraoperative blood loss, time of dissection of the targeted hepatic pedicle, cases undergoing dissection of the trunk of right anterior hepatic pedicle and its operation time, cases undergoing dissection of the trunk of right posterior hepatic pedicle and its operation time, cases with hepatic pedicle injury, cases with hepatic tissue injury, cases with dissection space as large and small were 150.00(130.00)minutes, 100.00(100.00)mL, 472.00(201.00)seconds, 10 and 366.00(94.75)seconds, 9 and 564.00(138.50)seconds, 2, 2, 25, 0 in patients of the CPA group, versus 140.00(113.00)minutes, 100.00(125.00)mL, 670.00(107.00)seconds, 8 and 663.00(136.00)seconds, 7 and 783.00(189.00)seconds, 8, 5, 2, 19 in patients of the traditional approach group. There were significant differences in the time of dissection of the targeted hepatic pedicle, time of dissection of the trunk of right anterior hepatic pedicle, time of dissection of the trunk of right posterior hepatic pedicle, hepatic tissue injury, dissection space between the two groups ( Z=-4.809, -3.254, -3.188, χ2=6.493, 34.314, P<0.05) and there was no significant difference in the operation time, volume of intraoperative blood loss, dissection of the trunk of right anterior hepatic pedicle, dissection of the trunk of right posterior hepatic pedicle, hepatic tissue injury between the two groups ( Z=-0.282, -0.412, χ2=0.095, 0.002, 1.976, P>0.05). (2) Postoperative situations. There was no patient undergoing postoperative hemorrhage in both of the two groups. The alanine transaminase (ALT), aspartate transaminase (AST), total bilirubin (TBil) and prothrombin time (PT) at postoperative day 3, cases with postoperative biliary fistula, pathological type of tumor (hepatocellular carcinoma, intrahepatic cholangiocarcinoma) were 68.00(48.50)U/L, 52.00(35.50)U/L, 28.30(12.35)mmol/L, 12.40(2.40)seconds, 2, 21, 4 in patients of the CPA group. The above indicators were 58.00(25.00)U/L, 41.00(19.50)U/L, 26.80(14.25)mmol/L, 12.50(2.95)seconds, 5, 15, 2 in patients of the traditional approach group. There was no significant difference in the ALT, AST, TBil, PT at postoperative day 3, cases with postoperative biliary fistula between the two groups ( Z=-1.218, -1.488, -0.205, -0.320, χ2=1.976, P>0.05), and there was no significant difference in the pathological type of tumor between the two groups ( P>0.05). Conclusion:Application of CPA for extrahepatic right hepatic pedicle dissection in MIALR is safe and feasible.

Objective:To investigate the application value of cystic plate approach (CPA) for extrahepatic right hepatic pedicle dissection in minimally invasive anatomical hepatectomy (MIALR).Methods:The retrospective cohort study was conducted. The clinicopathological data of 42 patients with primary liver cancer who underwent laparoscopic right hemi-hepatectomy in Nanfang Hospital of Southern Medical University from August 2020 to August 2022 were collected. There were 36 males and 6 females, aged (55±13)years. Of the 42 patients, 25 cases undergoing CPA for extrahepatic right hepatic pedicle dissection were divided into the CPA group, and 17 cases undergoing traditional approach for extrahepatic right hepatic pedicle dissection were divided into the traditional approach group. Observation indicators: (1) surgical situations; (2) postoperative situations. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the t test. Measurement data with skewed distribution were represented as M( IQR), and comparison between groups was conducted using the Mann-Whitney U test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi-square test or Fisher exact probability. Comparison of ordinal data was conducted using the non‐parameter rank sum test. Results:(1) Surgical situations. All patients in the two groups underwent laparos-copic right hemi-hepatectomy successfully, with the surgical margin as negative. The operation time, volume of intraoperative blood loss, time of dissection of the targeted hepatic pedicle, cases under-going dissection of the trunk of right anterior hepatic pedicle and its operation time, cases under-going dissection of the trunk of right posterior hepatic pedicle and its operation time, cases with hepatic pedicle injury, cases with hepatic tissue injury, cases with dissection space as large and small were 150.00(130.00)minutes, 100.00(100.00)mL, 472.00(201.00)seconds, 10 and 366.00(94.75)seconds, 9 and 564.00(138.50)seconds, 2, 2, 25, 0 in patients of the CPA group, versus 140.00(113.00)minutes, 100.00(125.00)mL, 670.00(107.00)seconds, 8 and 663.00(136.00)seconds, 7 and 783.00(189.00)seconds, 8, 5, 2, 19 in patients of the traditional approach group. There were significant differences in the time of dissection of the targeted hepatic pedicle, time of dissection of the trunk of right anterior hepatic pedicle, time of dissection of the trunk of right posterior hepatic pedicle, hepatic pedicle injury, dissection space between the two groups ( Z=-4.809, -3.254, -3.188, χ2=6.493, 34.314, P<0.05) and there was no significant difference in the operation time, volume of intraoperative blood loss, dissection of the trunk of right anterior hepatic pedicle, dissection of the trunk of right posterior hepatic pedicle, hepatic tissue injury between the two groups ( Z=-0.282, -0.412, χ2=0.095, 0.002, 1.976, P>0.05). (2) Postoperative situations. There was no patient under-going postoperative hemorrhage in both of the two groups. The alanine transaminase (ALT), aspartate transaminase (AST), total bilirubin (TBil) and prothrombin time (PT) at postoperative day 3, cases with postoperative biliary fistula, pathological type of tumor (hepatocellular carcinoma, intrahepatic cholangiocarcinoma) were 68.00(48.50)U/L, 52.00(35.50)U/L, 28.30(12.35)mmol/L, 12.40(2.40)seconds, 2, 21, 4 in patients of the CPA group. The above indicators were 58.00(25.00)U/L, 41.00(19.50)U/L, 26.80(14.25)mmol/L, 12.50(2.95)seconds, 5, 15, 2 in patients of the traditional approach group. There was no significant difference in the ALT, AST, TBil, PT at postoperative day 3, postoperative biliary fistula between the two groups ( Z=-1.218, -1.488, -0.205, -0.320, χ2=1.976, P>0.05), and there was no significant difference in the pathological type of tumor between the two groups ( P>0.05). Conclusion:Application of CPA for extrahepatic right hepatic pedicle dissection in MIALR is safe and feasible.

Objective:To investigate the value of large-scale brain network research based on independent component analysis (ICA) in discovering the changes of intrinsic functional connections within and between resting-state networks (RSNs) in first-episode untreated adult patients with major depressive disorder (MDD).Methods:From January 2019 to June 2021, twenty-three patients with MDD (MDD group) and 30 healthy volunteers (HC group) matched with gender, age and years of education were selected. All participants underwent resting-state brain function imaging (rs-fMRI), and the MDD group completed the 17-item Hamilton depression scale(HAMD-17). The independent component analysis (ICA) method was used to analyze rs-fMRI data, and meaningful RSNs were obtained. SPM12 and Gift softwares were used to compare the strength of intrinsic functional connection within and between the RSNs of the MDD group and HC group, and the Pearson correlation analysis was conducted by IBM SPSS statistics 25.0 to evaluate the correlation between the functional connection strength and HAMD-17 scores in MDD group.Results:Compared with the HC group, intrinsic functional connection strength of medial prefrontal cortex (mPFC) (MNI: x, y, z=-6, 54, 25)in MDD group was significantly enhanced, while the intrinsic functional connection strength of the left angular gyrus (AG) (MNI: x, y, z=-48, -66, 21), the left precuneus (PCu) (MNI: x, y, z=-6, -63, 33), the left dorsolateral prefrontal cortex (dlPFC) (MNI: x, y, z=-36, 12, 51)and the right anterior insula (AI) (MNI: x, y, z=36, 21, 0)were significantly weakened. Compared with the HC group, functional connection strength between posterior default mode net work(pDMN) and anterior default mode network(aDMN) in MDD group was significantly weakened ( t=-2.206, P=0.032), and function connection strength between pDMN and left frontal parietal network(lFPN) was significantly strengthened ( t=2.318, P=0.025). In MDD group, intrinsic functional connection strength of mPFC and the functional connection strength of pDMN-lFPN were positively correlated with the HAMD-17 score ( r=0.524, P=0.010; r=0.441, P=0.035). Conclusion:Large-scale brain network study based on the ICA can find abnormal functional connections within and between RSNs in first-episode untreated adult patients with MDD, and provide objective imaging markers for the clinical diagnosis and treatment of MDD.

Objective : To explore the technology and efficacy of fabrication of a guide and removal of a fiber post by tetrahedron positioning technology at the chair side. Methods: For one patient with acute chronic periapical periodontitis of the left maxillary lateral incisor who needed to have the fiber post removed, the chair side tetrahedral positioning technique was used to make a guide plate to remove the fiber post. Cone beam CT (CBCT) data were imported into the software to design the guide plate for fiber post removal. The guide plate design on CBCT was transferred to a solid model by using tetrahedral positioning technology. The guide plate was made to guide the removal of the fiber post, and then left maxillary lateral incisor root canal was performed. We evaluated the effect of fiber post removal with tetrahedral positioning technology by reviewing the literature. Results : The guide plate made by tetrahedral positioning technology can accurately locate the position and direction of fiber posts at a low cost and with high speed. After the fiber post was removed, the root canal could be dredged by using root canal preparation instruments. After root canal preparation, the root canal was filled with warm gutta-percha to complete the root canal treatment. After 3 months, the apical radiograph showed that the transmission shadow of the apical area was reduced. The results of the literature review showed that the fiber post removal with guide plates provides a predictable result and a lower risk of iatrogenic damage. Minimally invasive treatment can be carried out, and chair time can be reduced. Conclusion On the basis of CBCT data, using tetrahedral positioning technology to make fiber post removal guides can help reduce the risk of fiber post removal and has the characteristics of speed, low cost and short chair side processing. However, the accuracy comparison between tetrahedral positioning technology and 3D printing guides needs further study.