Objective To explore the value of CT-derived fractional flow reserve(CT-FFR)and pericoronary fat attenuation index(FAI)combined with clinical and coronary CT angiography(CCTA)characteristics for predicting major adverse cardiovascular events(MACE)after aortic valve replacement(AVR).Methods Data of 139 patients with aortic stenosis who underwent AVR were retrospectively analyzed.According to occurrence of MACE or not during follow-up,the patients were divided into MACE group and non-MACE group.Cox proportional hazard regression was used to analyze clinical and CCTA data,as well as CT-FFR and FAI to screen independent predictors of MACE after AVR,and nested models based on clinical data,CCTA characteristics,CT-FFR and right coronary artery(RCA)FAI were constructed.Receiver operating characteristic(ROC)curves were drawn,the area under the curve(AUC)and Harrell C index(C-index)were calculated to assess the diagnostic efficacy of each model,and their goodness of fit were evaluated.Results There were 22 cases in MACE group and 117 in non-MACE group.CT-FFR(HR=3.683)and RCA-FAI(HR=3.261)were both independent predictors of MACE in patients after AVR.The AUC of clinical model,modelclinical+CCTA,modelclinical+CCTA+CT-FFR and modelclinical+CCTA+CT-FFR+RCA-FAI was 0.636,0.730,0.758 and 0.817,and the C-index was 0.614,0.707,0.733 and 0.782,respectively.The predicted results of modelclinical+CCTA+CT-FFR+RCA-FAI were most consistent with actual results,with the best goodness of fit.Conclusion CT-FFR and RCA-FAI combined with clinical and CCTA characteristics could effectively predict MACE in patients after AVR.

OBJECTIVE: To compare the biomechanical differences among the five internal fixation modes in treatment of Day type Ⅱ crescent fracture dislocation of pelvis (CFDP), and find an internal fixation mode which was the most consistent with mechanical principles. METHODS: Based on the pelvic CT data of a healthy adult male volunteer, a Day type Ⅱ CFDP finite element model was established by using Mimics 17.0, ANSYS 12.0-ICEM, Abaqus 2020, and SolidWorks 2012 softwares. After verifying the validity of the finite element model by comparing the anatomical parameters with the three-dimensional reconstruction model and the mechanical validity verification, the fracture and dislocated joint of models were fixed with S ₁ sacroiliac screw combined with 1 LC-Ⅱ screw (S ₁+LC-Ⅱ group), S ₁ sacroiliac screw combined with 2 LC-Ⅱ screws (S ₁+2LC-Ⅱ group), S ₁ sacroiliac screw combined with 2 posterior iliac screws (S ₁+2PIS group), S ₁ and S ₂ sacroiliac screws combined with 1 LC-Ⅱ screw (S ₁+S ₂+LC-Ⅱ group), S ₂-alar-iliac (S ₂AI) screw combined with 1 LC-Ⅱ screw (S ₂AI+LC-Ⅱ group), respectively. After each internal fixation model was loaded with a force of 600 N in the standing position, the maximum displacement of the crescent fracture fragments, the maximum stress of the internal fixation (the maximum stress of the screw at the ilium fracture and the maximum stress of the screw at the sacroiliac joint), sacroiliac joint displacement, and bone stress distribution around internal fixation were observed in 5 groups. RESULTS: The finite element model in this study has been verified to be effective. After loading 600 N stress, there was a certain displacement of the crescent fracture of pelvis in each internal fixation model, among which the S ₁+LC-Ⅱ group was the largest, the S ₁+2LC-Ⅱ group and the S ₁+2PIS group were the smallest. The maximum stress of the internal fixation mainly concentrated at the sacroiliac joint and the fracture line of crescent fracture. The maximum stress of the screw at the sacroiliac joint was the largest in the S ₁+LC-Ⅱ group and the smallest in the S ₂AI+LC-Ⅱ group. The maximum stress of the screw at the ilium fracture was the largest in the S ₁+2PIS group and the smallest in the S ₁+2LC-Ⅱ group. The displacement of the sacroiliac joint was the largest in the S ₁+LC-Ⅱ group and the smallest in the S ₁+S ₂+LC-Ⅱ group. In each internal fixation model, the maximum stress around the sacroiliac screws concentrated on the contact surface between the screw and the cortical bone, the maximum stress around the screws at the iliac bone concentrated on the cancellous bone of the fracture line, and the maximum stress around the S ₂AI screw concentrated on the cancellous bone on the iliac side. The maximum bone stress around the screws at the sacroiliac joint was the largest in the S ₁+LC-Ⅱ group and the smallest in the S ₂AI+LC-Ⅱ group. The maximum bone stress around the screws at the ilium was the largest in the S ₁+2PIS group and the smallest in the S ₁+LC-Ⅱ group. CONCLUSION For the treatment of Day type Ⅱ CFDP, it is recommended to choose S ₁ sacroiliac screw combined with 1 LC-Ⅱ screw for internal fixation, which can achieve a firm fixation effect without increasing the number of screws.
Adult ; Male ; Humans ; Finite Element Analysis ; Fracture Fixation, Internal/methods* ; Fractures, Bone/surgery* ; Pelvis ; Spinal Fractures/surgery* ; Fracture Dislocation/surgery* ; Joint Dislocations/surgery* ; Biomechanical Phenomena

Bone defects caused by different causes such as trauma, severe bone infection and other factors are common in clinic and difficult to treat. Usually, bone substitutes are required for repair. Current bone grafting materials used clinically include autologous bones, allogeneic bones, xenografts, and synthetic materials, etc. Other than autologous bones, the major hurdles of rest bone grafts have various degrees of poor biological activity and lack of active ingredients to provide osteogenic impetus. Bone marrow contains various components such as stem cells and bioactive factors, which are contributive to osteogenesis. In response, the technique of bone marrow enrichment, based on the efficient utilization of components within bone marrow, has been risen, aiming to extract osteogenic cells and factors from bone marrow of patients and incorporate them into 3D scaffolds for fabricating bone grafts with high osteoinductivity. However, the scientific guidance and application specification are lacked with regard to the clinical scope, approach, safety and effectiveness. In this context, under the organization of Chinese Orthopedic Association, the Expert consensus for the clinical application of autologous bone marrow enrichment technique for bone repair ( version 2023) is formulated based on the evidence-based medicine. The consensus covers the topics of the characteristics, range of application, safety and application notes of the technique of autologous bone marrow enrichment and proposes corresponding recommendations, hoping to provide better guidance for clinical practice of the technique.

Periarticular fracture of the shoulder is a common type of fractures in the elderly. Postoperative adverse events such as internal fixation failure, humeral head ischemic necrosis and upper limb dysfunction occur frequently, which seriously endangers the exercise and health of the elderly. Compared with the fracture with normal bone mass, the osteoporotic periarticular fracture of the shoulder is complicated with slow healing and poor rehabilitation, so the clinical management becomes more difficult. At present, there is no targeted guideline or consensus for this type of fracture in China. In such context, experts from Youth Osteoporosis Group of Chinese Orthopedic Association, Orthopedic Expert Committee of Geriatrics Branch of Chinese Association of Gerontology and Geriatrics, Osteoporosis Group of Youth Committee of Chinese Association of Orthopedic Surgeons and Osteoporosis Committee of Shanghai Association of Chinese Integrative Medicine developed the Chinese expert consensus on the diagnosis and treatment of osteoporotic periarticular fracture of the shoulder in the elderly ( version 2023). Nine recommendations were put forward from the aspects of diagnosis, treatment strategies and rehabilitation of osteoporotic periarticular fracture of the shoulder, hoping to promote the standardized, systematic and personalized diagnosis and treatment concept and improve functional outcomes and quality of life in elderly patients with osteoporotic periarticular fracture of the shoulder.

BACKGROUND: Pneumonia-like primary pulmonary lymphoma (PPL) was commonly misdiagnosed as infectious pneumonia, leading to delayed treatment. The purpose of this study was to establish a computed tomography (CT)-based radiomics model to differentiate pneumonia-like PPL from infectious pneumonia. METHODS: In this retrospective study, 79 patients with pneumonia-like PPL and 176 patients with infectious pneumonia from 12 medical centers were enrolled. Patients from center 1 to center 7 were assigned to the training or validation cohort, and the remaining patients from other centers were used as the external test cohort. Radiomics features were extracted from CT images. A three-step procedure was applied for radiomics feature selection and radiomics signature building, including the inter- and intra-class correlation coefficients (ICCs), a one-way analysis of variance (ANOVA), and least absolute shrinkage and selection operator (LASSO). Univariate and multivariate analyses were used to identify the significant clinicoradiological variables and construct a clinical factor model. Two radiologists reviewed the CT images for the external test set. Performance of the radiomics model, clinical factor model, and each radiologist were assessed by receiver operating characteristic, and area under the curve (AUC) was compared. RESULTS: A total of 144 patients (44 with pneumonia-like PPL and 100 infectious pneumonia) were in the training cohort, 38 patients (12 with pneumonia-like PPL and 26 infectious pneumonia) were in the validation cohort, and 73 patients (23 with pneumonia-like PPL and 50 infectious pneumonia) were in the external test cohort. Twenty-three radiomics features were selected to build the radiomics model, which yielded AUCs of 0.95 (95% confidence interval [CI]: 0.94-0.99), 0.93 (95% CI: 0.85-0.98), and 0.94 (95% CI: 0.87-0.99) in the training, validation, and external test cohort, respectively. The AUCs for the two readers and clinical factor model were 0.74 (95% CI: 0.63-0.83), 0.72 (95% CI: 0.62-0.82), and 0.73 (95% CI: 0.62-0.84) in the external test cohort, respectively. The radiomics model outperformed both the readers' interpretation and clinical factor model ( P <0.05). CONCLUSIONS The CT-based radiomics model may provide an effective and non-invasive tool to differentiate pneumonia-like PPL from infectious pneumonia, which might provide assistance for clinicians in tailoring precise therapy.
Humans ; Retrospective Studies ; Pneumonia/diagnostic imaging* ; Analysis of Variance ; Tomography, X-Ray Computed ; Lymphoma/diagnostic imaging*

Objective:To analyze the detection rate and related factors of depressive and anxious symptoms comorbidity in 2021 and 2022.Methods:Based on the results of the Seventh National Population Census in 2021,the residents of 32 provinces,municipalities,and autonomous regions were sampled by gender and age.The gender and age of the samples were in line with the characteristics of China's population.A face-to-face interview survey was conducted in community residents in each province in 2021(n=11 005)and 2022(n=30 421)with the Gen-eralized Anxiety Questionnaire-7 and Patient Health Questionnaire-9.Results:The detection rates of depressive and anxious symptoms comorbidity were 10.67％in 2021 and 11.72％in 2022.The prevalence of depressive and anxi-ety comorbidity were higher in male,younger(age≤17 years),divorced,lower BMI(BMI＜18.5 kg/m2),higher education(graduate),students,and residents with chronic medical history(Ps＜0.001).In 2022,32.06％of people with depressive symptoms had anxious symptoms and 47.62％of people with anxious symptoms had depressive symptoms.Conclusion:In 2021 and 2022,the detection rates of depressive and anxious symptoms comorbidity were both about 10％,and half of patients with anxious symptoms were accompanied by depressive symptoms,So atten-tion should be paid to the comorbidity of depression and anxiety symptoms.

Objective:To analyze the vascular distribution of palmar digital arteries in syndactyly through color Doppler ultrasound angiography and make the classification according to the level of artery bifurcation points, discusse its clinical significance.Methods:A retrospective analysis was performed for the data of children with congenital and digital malformations admitted to Wuxi Ninth People’s Hospital from January 2017 to December 2022. Preoperative vascular ultrasonography of the hand was performed to locate the bifurcation point of the common palmar digital artery in the digital webbed area. The vascular conditions were classified according to the distance between the bifurcation point and the 1/3 point of the proximal phalangeal as the reference, such as normal type (<0 mm), mild reduction type (0-5 mm), moderate decrease type (6-10 mm), and severe reduction type (>10 mm), absent type (only 1 artery between the fingers). The total variation of the bifurcation point of the common palmar digital artery in the children, as well as the proportion of different vascular condition subtypes were recorded. According to the classification of blood vessels, the corresponding operation plan was made. The positioning accuracy of color Doppler ultrasound angiography was evaluated based on the gold standard of common palmar digital artery bifurcation points detected during operation. Complications such as postoperative infection, flap necrosis, finger vasospasm and the morphology of finger web at the last follow-up were observed. Descriptive statistical analysis was used.Results:A total of 123 children with 181 finger webs were enrolled, including 72 males and 51 females, aged 10-28 months. There were 55 cases of simple type, 36 cases of complex type (bone) and 32 cases of Poland syndrome. Color Doppler ultrasound angiography showed that the total variation rate of the common palmar digital arterial bifurcation point was 24.3% (44/181), of which 11.6% (21/181) were mildly reduced type, 8.3% (15/181) were moderately reduced type, 3.3% (6/181) were severe reduced type, and 1.1% (2/181) were absent type. The vascular variation rates of simple syndactyly, bony syndactyly, and Poland syndrome were 0 (0/55), 19.5% (7/36), and 41.1% (37/90), respectively. Compared with the actual situation during surgery, the positioning accuracy of color Doppler ultrasound angiography was 100%. All pediatric surgeries were successfully completed, and the flaps and skin grafts survived smoothly. There were no postoperative complications such as infection, vascular crisis, or finger necrosis. All patients were followed up for 6 to 27 months, with an average of 13.5 months. At the last follow-up, the depth, width, and slope of the fingerwebs were all close to normal.Conclusion:Congenital syndactyly has a high variation rate at the bifurcation point of the common palmar digital artery, and bony syndactyly and Poland syndrome refer to the need to improve preoperative vascular evaluation. Color Doppler ultrasound angiography has the advantages of no radiation, high sensitivity and low price, and the vascular typing based on color Doppler can improve the reliable basis for the formulation of clinical surgical plans.

Objective:To analyze the vascular distribution of palmar digital arteries in syndactyly through color Doppler ultrasound angiography and make the classification according to the level of artery bifurcation points, discusse its clinical significance.Methods:A retrospective analysis was performed for the data of children with congenital and digital malformations admitted to Wuxi Ninth People’s Hospital from January 2017 to December 2022. Preoperative vascular ultrasonography of the hand was performed to locate the bifurcation point of the common palmar digital artery in the digital webbed area. The vascular conditions were classified according to the distance between the bifurcation point and the 1/3 point of the proximal phalangeal as the reference, such as normal type (<0 mm), mild reduction type (0-5 mm), moderate decrease type (6-10 mm), and severe reduction type (>10 mm), absent type (only 1 artery between the fingers). The total variation of the bifurcation point of the common palmar digital artery in the children, as well as the proportion of different vascular condition subtypes were recorded. According to the classification of blood vessels, the corresponding operation plan was made. The positioning accuracy of color Doppler ultrasound angiography was evaluated based on the gold standard of common palmar digital artery bifurcation points detected during operation. Complications such as postoperative infection, flap necrosis, finger vasospasm and the morphology of finger web at the last follow-up were observed. Descriptive statistical analysis was used.Results:A total of 123 children with 181 finger webs were enrolled, including 72 males and 51 females, aged 10-28 months. There were 55 cases of simple type, 36 cases of complex type (bone) and 32 cases of Poland syndrome. Color Doppler ultrasound angiography showed that the total variation rate of the common palmar digital arterial bifurcation point was 24.3% (44/181), of which 11.6% (21/181) were mildly reduced type, 8.3% (15/181) were moderately reduced type, 3.3% (6/181) were severe reduced type, and 1.1% (2/181) were absent type. The vascular variation rates of simple syndactyly, bony syndactyly, and Poland syndrome were 0 (0/55), 19.5% (7/36), and 41.1% (37/90), respectively. Compared with the actual situation during surgery, the positioning accuracy of color Doppler ultrasound angiography was 100%. All pediatric surgeries were successfully completed, and the flaps and skin grafts survived smoothly. There were no postoperative complications such as infection, vascular crisis, or finger necrosis. All patients were followed up for 6 to 27 months, with an average of 13.5 months. At the last follow-up, the depth, width, and slope of the fingerwebs were all close to normal.Conclusion:Congenital syndactyly has a high variation rate at the bifurcation point of the common palmar digital artery, and bony syndactyly and Poland syndrome refer to the need to improve preoperative vascular evaluation. Color Doppler ultrasound angiography has the advantages of no radiation, high sensitivity and low price, and the vascular typing based on color Doppler can improve the reliable basis for the formulation of clinical surgical plans.

Objective:To investigate the preoperative ascending aorta diameter in patients with acute type A aortic dissection in the Chinese population, compares and analyze the differences in preoperative blood biomarkers, and evaluate the impact of the preoperative ascending aorta diameter in this part of patients on the short-term prognosis of patients.Methods:A collection of 641 patients with acute type A aortic dissection who were enrolled in the " Acute Aortic Syndrome High-Risk Early Warning and Intervention Study" project from January 2018 to January 2020 were collected. Divide the patients into two groups (group Ⅰ<55 mm, group Ⅱ≥55 mm) according to the preventive intervention value of ascending aorta diameter recommended by the guideline for studying preoperative ascending aorta diameter difference in blood biomarkers and the influence of ascending aorta diameter on the short-term prognosis of patients. All patients had CT scans to assess the diameter of the ascending aorta before operation.Results:In this study, all patients with acute type A aortic dissection had a mean preoperative ascending aorta diameter of (46.9±9.7)mm. The preoperative ascending aorta diameter of all patients was less than 55 mm, accounted for 84.1%. Male patients were more likely to have aortic dissection than females; most patients' age was less than 60 years old. The preoperative blood inflammatory index counts were higher in the ascending aorta diameter ≥55 mm group. However, the long-term prognosis of patients with different ascending aorta diameters before surgery was not apparent in this study. The preoperative survival rate and short-term survival rate of patients with ascending aorta diameter <55 mm were higher than those of other groups, but the difference was not statistically significant.Conclusion:In patients with acute type A aortic dissection, the diameter of the ascending aorta is usually less than 55 mm. Moreover, the blood inflammatory index counts are high in the preoperative ascending aorta diameter ≥55 mm group. Meanwhile, patients with smaller ascending aorta diameter have better survival rate and short-term prognosis.

Objective    To evaluate the preoperative risk factors for acute Stanford type A aortic dissection (ASTAAD) patients in our country by collecting multi-center data. Methods    We consecutively enrolled 700 patients who underwent surgery for ASTAAD in the multi-center hospital database from January 2018 to January 2020. According to the ascending aorta size (AAS), the patients were divided into two groups: a group AAS≥55 mm and a group AAS< 55 mm. Univariate and multivariate logistic regression analyses were used to investigate the related preoperative risk factors for the onset of ASTAAD. Results    According to the exclusion criteria, a total of 621 patients were finally enrolled, including 453 males and 168 females with an average age of 48.24±11.51 years, and 509 (81.94%) patients had AAS< 55 mm. Univariate and multivariate statistical analyses showed that smoking, hypertension, preoperative cardiac troponin I, and left ventricular ejection fraction were related to the occurrence of ASTAAD. The mortality rate of the patient during hospitalization was 13.04% (81 patients). Conclusion    In clinical practice, various preoperative risk factors affect ASTAAD patients, which should be paid attention to. Comprehensive evaluation and an individualized analysis of patients and timely prevention and intervention improve patients' survival rate.