Objective:To report the preclinical trial results of the application of a domestic high-flow percutaneous left ventricular assist device (pLVAD) in patients with low cardiac output syndrome (LCOS) following cardiac surgery.Methods:Six patients who developed LCOS after direct cardiac surgery were implanted with a domestic high-flow pLVAD. Clinical outcomes, including hemodynamic changes, complications, and survival rates were observed post-implantation.Results:Four patients underwent pLVAD implantation under digital subtraction angiography (DSA) guidance, while two patients had the procedure performed under ultrasound guidance. The implantation process was straightforward, rapid, and uneventful, with no instances of bleeding or arrhythmias. The flow rate at the initiation of pLVAD support was 3.8-5.0 (4.22±0.44)L/min, and the flow rate during pump removal was 1.0-1.3(1.18±0.15)L/min. The duration of pLVAD support was 16.5-165.0(101.3±60.65)h. Hemodynamic parameters showed immediate improvement following pLVAD support: mean arterial pressure increased from (62.67±4.46)mmHg to (80.50±18.96)mmHg (1 mmHg=0.133 kPa, P=0.049), cardiac output increased from (2.45±0.66)L/min to (4.35±1.32)L/min( P=0.01), cardiac index improved from (1.95±0.21)L·min -1·m -2 to (2.77±0.33)L·min -1·m -2( P<0.001), pulmonary artery diastolic pressure decreased from (27.50±1.87) mmHg to(18.33±4.18)mmHg( P=0.001), and left ventricular ejection fraction improved from 0.27±0.04 to 0.37±0.06 ( P=0.004). No visible hemoglobinuria was noted during the support period. No malignant arrhythmias or cerebrovascular complications occurred. One patient required transition to surgical LVAD implantation, while the other five patients had the pLVAD successfully removed and were discharged. Three months later, all six patients were alive, with functional status classified as New York Heart Association (NYHA) Class Ⅰ-Ⅱ. Conclusion:The implantation of a domestic high-flow pLVAD provides a safe and effective therapeutic option for patients with LCOS following cardiac surgery.

Objective To explore the clinical characteristics and risk factors of upper urinary tract stones complicated with non-alcoholic fatty liver disease(NAFLD),so as to provide reference for the prevention of this disease.Methods The clinical data of 158 NAFLD patients undergoing surgical treatment in our hospital during Jan.2022 and Jul.2023 were retrospectively analyzed.According to whether the patients were complicated with NAFLD,they were divided into the NAFLD group(n=56)and non-NAFLD group(n=102).The general data,laboratory indexes and 24-h urinary metabolic indexes were compared between the two groups,and the risk factors were analyzed with univariate and multivariate logistic regression analyses.Results Compared with the non NAFLD group,the NAFLD group had higher BMI[(28.17±4.17)vs.(24.11±3.72),P＜0.001],blood uric acid[(354.13±111.01)μmol/L vs.(294.41±93.72)μmol/L,P＜0.001],and 24-h urinary oxalate level[(37.74±15.00)mmol vs.(27.73±15.27)mmol,P＜0.001].Multivariate logistic analysis showed that BMI(OR=1.311,P＜0.001),24-h urinary oxalate(OR=1.046,P=0.004),and 24-h urinary magnesium(OR=0.599,P=0.002)were the independent factors for NAFLD with upper urinary tract stones.Conclusion NAFLD complicated with upper urinary tract stones is significantly associated with high BMI,high 24-h urinary oxalate,and low 24-h urinary magnesium.

Objective:To investigate the independent risk factors for the occurrence of early urinary incontinence after Holmium laser enucleation of the prostate(HoLEP), and to construct a clinical risk predictive model for postoperative urinary incontinence.Methods:A retrospective analysis was conducted on the clinical data of 384 patients who underwent HoLEP between February 2019 and July 2024 at the Second Affiliated Hospital of Zhengzhou University. The cohort had a mean age of (68.3 ± 6.5) years, with a body mass index (BMI) of 22.45 (20.11, 24.39) kg/m 2. The median duration of lower urinary tract symptoms was 60 (36, 60) months. Of the patients, 104 (27.1%) had a history of diabetes mellitus, 139 (36.2%) had hypertension, and 54 (14.1%) had a preoperative indwelling urinary catheter. Additionally, 136 patients (35.4%) had a preoperative prostate-specific antigen (PSA) level ≥ 4 ng/ml, and 197 patients (51.3%) had a preoperative residual urine volume ≥ 50 ml. The International Prostate Symptom Score (IPSS) was ≥ 19 in 227 cases (59.1%). Preoperative detrusor instability was observed in 169 cases (44.0%), with a median maximal urinary flow rate of 5.9 (4.5, 9.3) ml/s and a median urinary flow rate of 4.0 (3.4, 7.3) ml/s. Moreover, 148 cases (38.5%) had a preoperative prostate volume ≥ 65 ml, and the preoperative median maximum urethral length (MUL) was 13.99 (12.40, 16.24) mm. Postoperative follow-up allowed for division of the patients into two groups: those with recovery of urinary control function and those with early postoperative urinary incontinence. The general characteristics of both groups were compared. Independent risk factors for early postoperative urinary incontinence were identified through multifactorial logistic regression. Variables with statistically significant differences were included in a column chart model created using R software. Internal validation was performed through repeated sampling with the Bootstrap method to assess the model's discriminative ability. Calibration curves were plotted to examine the consistency between predicted and actual outcomes, and the Hosmer-Lemeshow test was used to evaluate the model's fit. Results:This study included 384 patients, with 313 in the urinary control function recovery group and 71 in the early incontinence group. There were statistically significant difference between the two groups in age [≥70 years old: 91 (29.1%) vs. 33 (46.5%)], prostate volume [≥65 ml: 110 (35.1%) vs. 38 (53.5%)], MUL [14.21 (12.63, 16.24) mm vs. 13.12 (12.21, 13.95) mm], and non-inhibitory contraction of the urethra muscle in both groups [125 (39.9%) vs. 44 cases (62.0%)] ( P < 0.05). No significant differences were observed between the two groups in terms of BMI, disease duration, history of diabetes mellitus, preoperative catheterization, IPSS, preoperative PSA, residual bladder urine volume, maximum urinary flow rate, average urinary flow rate, operative time, or duration of indwelling urinary catheterization ( P > 0.05). Multifactorial logistic regression analysis revealed that age ≥ 70 years ( OR = 0.414, 95% CI 0.230-0.746, P = 0.003), prostate volume ≥ 65 ml ( OR=0.451, 95% CI 0.251-0.812, P=0.008), MUL( OR=0.688, 95% CI 0.590-0.802, P<0.001), and detrusor instability, uninhibited detrusor contraction ( OR=0.526, 95% CI 0.279-0.994, P=0.048) were independent risk factors for early postoperative urinary incontinence following HoLEP. A prediction model was developed based on these findings, and internal validation showed a C-index of 0.753. The calibration curve was close to the ideal curve, indicating that the model has good predictive performance. Conclusions:Age ≥70 years, prostate volume ≥65 ml, MUL, and uninhibited contraction of the urethra muscle were independent influences on early urinary incontinence after HoLEP, and the nomogram constructed in this way had good predictive performance for the risk of developing early urinary incontinence after HoLEP.

Objective:To explore the predictive factors for ureteral stone impaction preoperatively and to construct a nomogram prediction model for impacted ureteral stones.Methods:A retrospective analysis was conducted on the clinical data of 209 patients with ureteral stones treated at The Second Affiliated Hospital of Zhengzhou University from July 2023 to June 2024. There were 164 males（78.5%）and 45 females（21.5%）. The age was 49（47，57）years，and the body mass index（BMI）was 25.10（23.55，27.24）kg/m2. Of the patients，85（40.7%）had comorbid hypertension and 85（40.7%）had comorbid diabetes. Stones were located on the left side in 124 patients（59.3%）and on the right side in 85 patients（40.7%）. Hydronephrosis was present in 169 patients（80.9%），and urine culture was positive in 29 patients（13.9%）. Patients were divided into impacted and non-impacted groups based on the presence or absence of ureteral stone impaction. Univariate and multivariate logistic regression analyses were performed to determine independent predictive factors for impacted ureteral stones. A nomogram model was constructed based on these results. The performance of the predictive model was evaluated using receiver operating characteristic（ROC）curves，calibration plots，and decision curve analysis（DCA）.Results:Among the 209 patients in this study，85（40.7%）experienced ureteral stone impaction. The impacted group had a significantly higher neutrophil-to-lymphocyte ratio（NLR）than the non-impacted group（3.91 ± 2.05 vs. 3.25 ± 2.10， P = 0.024），a higher rate of hydronephrosis［81.2%（69/85）vs. 80.6%（100/124）， P = 0.002］，larger stone surface area［（64.96 ± 39.96）mm2 vs.（51.86 ± 39.80）mm2， P = 0.021］，greater ureteral wall thickness（UWT）［（3.96 ± 1.37）mm vs.（3.06 ± 1.33）mm， P < 0.001］，and a higher ratio of the upper ureter diameter（D1）to the lower ureter diameter（D2）（DDR）（2.87 ± 1.58 vs. 2.00 ± 0.99， P < 0.001）. Univariate analysis showed that NLR，hydronephrosis，stone length，stone surface area，UWT，D1，D2，and DDR were statistically significant（ P < 0.05）. After multivariate logistic regression analysis，the following items were identified as independent predictors of impacted ureteral stones：NLR（ OR = 1.205，95% CI 1.026 - 1.415， P = 0.023），hydronephrosis（ OR = 1.840，95% CI 1.236 - 2.740， P = 0.003），stone length（ OR = 1.587，95% CI 1.142 - 2.206， P = 0.006），ureteral wall thickness（UWT）（ OR = 1.643，95% CI 1.263 - 2.136， P < 0.001），and DDR（ OR = 2.907，95% CI 1.040 - 8.130， P = 0.042）.Based on these independent predictive factors，a nomogram prediction model for impacted ureteral stones was constructed. The area under the ROC curve was 0.797（95% CI 0.737 - 0.858），and the calibration curve showed good consistency. The decision curve suggested that the model had good clinical net benefit. Conclusions:NLR，hydronephrosis，stone length，UWT，and DDR are all independent predictors for impacted ureteral stones. The nomogram model constructed based on these factors has good predictive performance.

Objective:To explore the risk factors of fungal infection in patients with upper urinary tract calculi after surgery and construct a risk prediction nomograph model.Methods:The clinical data of 2 329 patients who had undergone upper urinary calculus surgery in the Second Affiliated Hospital of Zhengzhou University from January 2019 to December 2023 were retrospectively analyzed. According to the presence or absence of fungal infection within 3 months after surgery, the patients were divided into fungal infection group (n=97) and non-fungal infection group (n=2 232). Univariate logistic regression analysis and LASSO regression were used to screen the potential influencing factors. The enrolled patients were randomly divided into a training set (n=1 630) and a validation set (n=699) at a ratio of 7∶3. Based on the training set, multivariate logistic stepwise regression was used to screen independent risk factors and to construct a nomogram. Based on the validation set, ROC curve, calibration curve and decision curve were drawn to evaluate the model's differentiation, accuracy and clinical applicability.Results:Univariate logistic regression analysis showed that female gender, age, diabetes mellitus, history of malignant tumor, long-term bedridden disease, long-term use of immunosuppressants, hemoglobin on admission, serum creatinine, uric acid, white blood cell count on admission, neutrophil count on admission, degree of hydronephrosis, preoperative indwelling ureteral stent, duration of surgery, postoperative fever within 48 hours, white blood cell count, neutrophil count, CRP, urinary catheter indwelling time, length of hospital stay, use of carbapenem antibiotics, the duration of antibiotic use and the duration of postoperative ureteral stent indwelling were related to fungal infection. screening after upper urinary calculi surgery ( P<0.05). Univariate logistic regression results were screened after LASSO regression. Multivariate logistic stepwise regression analysis for the training set showed that age ( OR=1.041, 95% CI 1.017-1.066, P=0.001), diabetes( OR=3.138, 95% CI 1.517-6.492, P=0.002), long-term bed-rest ( OR=10.627, 95% CI 3.671-30.767, P<0.001), history of malignant tumor( OR=11.934, 95% CI 5.473-26.022, P<0.001), white blood cell count on admission( OR=1.276, 95% CI 1.134-1.436, P<0.001), postoperative fever within 48 hours ( OR=3.940, 95% CI 1.956-7.937, P<0.001), use of carbapenem antibiotics( OR=5.826, 95% CI 2.783-12.196, P<0.001), length of hospital stay( OR=1.201, 95% CI 1.131-1.277, P<0.001), and postoperative retention time of ureteral stent( OR=1.205, 95% CI 1.104-1.315, P<0.001) were independent risk factors for fungal infection after upper urinary calculi surgery.The nomogram model was constructed based on independent risk factors. The results of ROC curve analysis showed that the AUC of the nomogram model in the prediction validation set was 0.955(95% CI 0.926-0.984). The calibration curve of the model was well fitted to the ideal curve. The results of decision curve analysis proved that the net benefit rate of the prediction model within the threshold range was higher than the two extreme lines when the threshold probability was <86%, indicating that the model was of good clinical applicability. Conclusions:Age, diabetes, history of malignant tumor, long-term bed-rest disease, white blood cell count on admission, postoperative fever within 48 hours, use of carbapenem antibiotics, length of hospital stay, and postoperative retention time of ureteral stent are independent risk factors for fungal infection in patients with upper urinary calculi after surgery. The model constructed in this study has good predictive ability and clinical applicability for the risk of fungal infection in patients with upper urinary calculi after surgery.

Objective:To report the preclinical trial results of the application of a domestic high-flow percutaneous left ventricular assist device (pLVAD) in patients with low cardiac output syndrome (LCOS) following cardiac surgery.Methods:Six patients who developed LCOS after direct cardiac surgery were implanted with a domestic high-flow pLVAD. Clinical outcomes, including hemodynamic changes, complications, and survival rates were observed post-implantation.Results:Four patients underwent pLVAD implantation under digital subtraction angiography (DSA) guidance, while two patients had the procedure performed under ultrasound guidance. The implantation process was straightforward, rapid, and uneventful, with no instances of bleeding or arrhythmias. The flow rate at the initiation of pLVAD support was 3.8-5.0 (4.22±0.44)L/min, and the flow rate during pump removal was 1.0-1.3(1.18±0.15)L/min. The duration of pLVAD support was 16.5-165.0(101.3±60.65)h. Hemodynamic parameters showed immediate improvement following pLVAD support: mean arterial pressure increased from (62.67±4.46)mmHg to (80.50±18.96)mmHg (1 mmHg=0.133 kPa, P=0.049), cardiac output increased from (2.45±0.66)L/min to (4.35±1.32)L/min( P=0.01), cardiac index improved from (1.95±0.21)L·min -1·m -2 to (2.77±0.33)L·min -1·m -2( P<0.001), pulmonary artery diastolic pressure decreased from (27.50±1.87) mmHg to(18.33±4.18)mmHg( P=0.001), and left ventricular ejection fraction improved from 0.27±0.04 to 0.37±0.06 ( P=0.004). No visible hemoglobinuria was noted during the support period. No malignant arrhythmias or cerebrovascular complications occurred. One patient required transition to surgical LVAD implantation, while the other five patients had the pLVAD successfully removed and were discharged. Three months later, all six patients were alive, with functional status classified as New York Heart Association (NYHA) Class Ⅰ-Ⅱ. Conclusion:The implantation of a domestic high-flow pLVAD provides a safe and effective therapeutic option for patients with LCOS following cardiac surgery.

Objective:To investigate the independent risk factors for the occurrence of early urinary incontinence after Holmium laser enucleation of the prostate(HoLEP), and to construct a clinical risk predictive model for postoperative urinary incontinence.Methods:A retrospective analysis was conducted on the clinical data of 384 patients who underwent HoLEP between February 2019 and July 2024 at the Second Affiliated Hospital of Zhengzhou University. The cohort had a mean age of (68.3 ± 6.5) years, with a body mass index (BMI) of 22.45 (20.11, 24.39) kg/m 2. The median duration of lower urinary tract symptoms was 60 (36, 60) months. Of the patients, 104 (27.1%) had a history of diabetes mellitus, 139 (36.2%) had hypertension, and 54 (14.1%) had a preoperative indwelling urinary catheter. Additionally, 136 patients (35.4%) had a preoperative prostate-specific antigen (PSA) level ≥ 4 ng/ml, and 197 patients (51.3%) had a preoperative residual urine volume ≥ 50 ml. The International Prostate Symptom Score (IPSS) was ≥ 19 in 227 cases (59.1%). Preoperative detrusor instability was observed in 169 cases (44.0%), with a median maximal urinary flow rate of 5.9 (4.5, 9.3) ml/s and a median urinary flow rate of 4.0 (3.4, 7.3) ml/s. Moreover, 148 cases (38.5%) had a preoperative prostate volume ≥ 65 ml, and the preoperative median maximum urethral length (MUL) was 13.99 (12.40, 16.24) mm. Postoperative follow-up allowed for division of the patients into two groups: those with recovery of urinary control function and those with early postoperative urinary incontinence. The general characteristics of both groups were compared. Independent risk factors for early postoperative urinary incontinence were identified through multifactorial logistic regression. Variables with statistically significant differences were included in a column chart model created using R software. Internal validation was performed through repeated sampling with the Bootstrap method to assess the model's discriminative ability. Calibration curves were plotted to examine the consistency between predicted and actual outcomes, and the Hosmer-Lemeshow test was used to evaluate the model's fit. Results:This study included 384 patients, with 313 in the urinary control function recovery group and 71 in the early incontinence group. There were statistically significant difference between the two groups in age [≥70 years old: 91 (29.1%) vs. 33 (46.5%)], prostate volume [≥65 ml: 110 (35.1%) vs. 38 (53.5%)], MUL [14.21 (12.63, 16.24) mm vs. 13.12 (12.21, 13.95) mm], and non-inhibitory contraction of the urethra muscle in both groups [125 (39.9%) vs. 44 cases (62.0%)] ( P < 0.05). No significant differences were observed between the two groups in terms of BMI, disease duration, history of diabetes mellitus, preoperative catheterization, IPSS, preoperative PSA, residual bladder urine volume, maximum urinary flow rate, average urinary flow rate, operative time, or duration of indwelling urinary catheterization ( P > 0.05). Multifactorial logistic regression analysis revealed that age ≥ 70 years ( OR = 0.414, 95% CI 0.230-0.746, P = 0.003), prostate volume ≥ 65 ml ( OR=0.451, 95% CI 0.251-0.812, P=0.008), MUL( OR=0.688, 95% CI 0.590-0.802, P<0.001), and detrusor instability, uninhibited detrusor contraction ( OR=0.526, 95% CI 0.279-0.994, P=0.048) were independent risk factors for early postoperative urinary incontinence following HoLEP. A prediction model was developed based on these findings, and internal validation showed a C-index of 0.753. The calibration curve was close to the ideal curve, indicating that the model has good predictive performance. Conclusions:Age ≥70 years, prostate volume ≥65 ml, MUL, and uninhibited contraction of the urethra muscle were independent influences on early urinary incontinence after HoLEP, and the nomogram constructed in this way had good predictive performance for the risk of developing early urinary incontinence after HoLEP.

Objective: To investigate the epidemiological characteristics of epidemic encephalitis B in Huzhou City, Zhejiang Province from 2007 to 2023, so as to provide the evidence for formulating prevention and control measures for epidemic encephalitis B. Methods: Epidemic encephalitis B case data in Huzhou City from 2007 to 2023 were collected through the National Notifiable Disease Reporting System of the Chinese Disease Prevention and Control Information System. The temporal, regional and population distribution characteristics of laboratory-confirmed epidemic encephalitis B cases were analyzed using the descriptively epidemiological method. Results: A total of 49 laboratory-confirmed epidemic encephalitis B cases were reported in Huzhou City from 2007 to 2023, and the average annual incidence was 0.10/105, showing a significant downward trend (P<0.05). The epidemic encephalitis B cases were concentrated from July to August, and July was the peak month, with 40 cases accounting for 81.63%. There was a statistically significant difference in the average annual incidences of epidemic encephalitis B among counties (districts) (P<0.05). Nanxun District had the highest reported incidence, with an average annual incidence of 0.23/105. There were 30 male cases and 19 female cases, with a male-to-female ratio of 1.58∶1. The youngest case was 5 months old, and the oldest was 49 years old. The children under 15 years were in the majority, with 42 cases accounting for 85.71%. Most of the cases were scattered children, with 25 cases accounting for 51.02%. There were 22 cases with no vaccination history and 21 cases with an unknown vaccination history, accounting for 44.90% and 42.86% respectively. All cases presented with fever. Other main clinical symptoms included listlessness, drowsiness, vomiting and headache, with 47, 40, 33 and 29 cases respectively, accounting for 95.92%, 81.63%, 67.35% and 59.18%, respectively. Conclusions The incidence of epidemic encephalitis B in Huzhou City remained at a relatively low level from 2007 to 2023, with Nanxun District being the high-risk area and July being the peak month for disease incidence. Fever and listlessness were the predominant clinical manifestations. Strengthening vaccination for children under 15 years should be prioritized.

Objective: To investigate the status of salt-restriction spoons use among residents in Zhejiang Province, so as to provide evidence for optimizing salt-reduction intervention strategies and preventing chronic disease. Methods: Residents aged 18-69 from five counties (cities/districts) in Zhejiang Province were selected using a multi-stage stratified random sampling method. Demographic characteristics, dietary habits, and salt-restriction spoons use were collected using questionnaires. The rate of salt-restriction spoons use and correct rate of salt-restriction spoons use were analyzed. Factors affecting salt-restriction spoons use among residents were analyzed by multivariable logistic regression model. Results: Totally 7 601 questionnaires were allocated, and 7 509 valid questionnaires were recovered, with an effective recovery rate of 98.79%. The respondents included 3 744 males (49.86%) and 3 765 females (50.14%). The mean age was (44.81±14.03) years. The rate of salt-restriction spoons use was 11.97%, the correct rate of salt-restriction spoon use was 52.73%. Multivariable logistic regression analysis showed that rural (OR=0.851, 95%CI: 0.731-0.991), education level of primary school and below (illiterate or semi-literate, OR=0.269, 95%CI: 0.172-0.420; primary school, OR=0.595, 95%CI: 0.436-0.811), and excessive dietary salt intake (OR=0.718, 95%CI: 0.559-0.922) were inhibiting factors for salt-restriction spoons use among residents; physical exercise (OR=1.581, 95%CI: 1.362-1.836) and received health education on a low-salt diet (OR=2.082, 95%CI: 1.790-2.421) were promoting factors for salt-restriction spoons use among residents. Conclusions The rate of salt-restriction spoons use among residents in Zhejiang Province was relatively low, primarily influenced by region, educational level, physical activity, dietary salt intake, and health education on a low-salt diet. It is recommended that propose a multi-component intervention strategy centered on skill enhancement and health education, delivered through progressive staged implementation, to promote sustained adoption of salt-restriction spoons among residents.

Objective:To explore the predictive factors for ureteral stone impaction preoperatively and to construct a nomogram prediction model for impacted ureteral stones.Methods:A retrospective analysis was conducted on the clinical data of 209 patients with ureteral stones treated at The Second Affiliated Hospital of Zhengzhou University from July 2023 to June 2024. There were 164 males（78.5%）and 45 females（21.5%）. The age was 49（47，57）years，and the body mass index（BMI）was 25.10（23.55，27.24）kg/m2. Of the patients，85（40.7%）had comorbid hypertension and 85（40.7%）had comorbid diabetes. Stones were located on the left side in 124 patients（59.3%）and on the right side in 85 patients（40.7%）. Hydronephrosis was present in 169 patients（80.9%），and urine culture was positive in 29 patients（13.9%）. Patients were divided into impacted and non-impacted groups based on the presence or absence of ureteral stone impaction. Univariate and multivariate logistic regression analyses were performed to determine independent predictive factors for impacted ureteral stones. A nomogram model was constructed based on these results. The performance of the predictive model was evaluated using receiver operating characteristic（ROC）curves，calibration plots，and decision curve analysis（DCA）.Results:Among the 209 patients in this study，85（40.7%）experienced ureteral stone impaction. The impacted group had a significantly higher neutrophil-to-lymphocyte ratio（NLR）than the non-impacted group（3.91 ± 2.05 vs. 3.25 ± 2.10， P = 0.024），a higher rate of hydronephrosis［81.2%（69/85）vs. 80.6%（100/124）， P = 0.002］，larger stone surface area［（64.96 ± 39.96）mm2 vs.（51.86 ± 39.80）mm2， P = 0.021］，greater ureteral wall thickness（UWT）［（3.96 ± 1.37）mm vs.（3.06 ± 1.33）mm， P < 0.001］，and a higher ratio of the upper ureter diameter（D1）to the lower ureter diameter（D2）（DDR）（2.87 ± 1.58 vs. 2.00 ± 0.99， P < 0.001）. Univariate analysis showed that NLR，hydronephrosis，stone length，stone surface area，UWT，D1，D2，and DDR were statistically significant（ P < 0.05）. After multivariate logistic regression analysis，the following items were identified as independent predictors of impacted ureteral stones：NLR（ OR = 1.205，95% CI 1.026 - 1.415， P = 0.023），hydronephrosis（ OR = 1.840，95% CI 1.236 - 2.740， P = 0.003），stone length（ OR = 1.587，95% CI 1.142 - 2.206， P = 0.006），ureteral wall thickness（UWT）（ OR = 1.643，95% CI 1.263 - 2.136， P < 0.001），and DDR（ OR = 2.907，95% CI 1.040 - 8.130， P = 0.042）.Based on these independent predictive factors，a nomogram prediction model for impacted ureteral stones was constructed. The area under the ROC curve was 0.797（95% CI 0.737 - 0.858），and the calibration curve showed good consistency. The decision curve suggested that the model had good clinical net benefit. Conclusions:NLR，hydronephrosis，stone length，UWT，and DDR are all independent predictors for impacted ureteral stones. The nomogram model constructed based on these factors has good predictive performance.