Objective:To explore the related risk factors of diaphragmatic hernia after thoraco-laparoscopic minimally invasive Mckeown esophagectomy (MIME).Methods:This is a retrospective controlled study. A retrospective analysis was conducted on the clinical data of patients who underwent MIME at the Department of Thoracic Surgery, Fourth Hospital of Hebei Medical University, from January 2016 to December 2023. A total of 619 patients were included. There were 423 males and 196 females, aged (63.7±7.6) years (range: 37 to 87 years). The diagnosis of diaphragmatic hernia after MIME was made based on clinical symptoms and CT scans. Patients were divided into two groups: the diaphragmatic hernia group ( n=16) and the non-diaphragmatic hernia group ( n=603). Clinical data, including age, gender, body mass index (BMI), smoking history, tumor location (upper, middle, and lower thoracic esophagus), preoperative neoadjuvant therapy history, and tumor staging, were collected and analyzed. A BMI of 25 kg/m2 and age of 65 years were used as cutoff values. The χ2 test and Fisher′s exact test were used to compare the data between the two groups, and Logistic regression was employed for risk factor analysis. The diaphragmatic hernia group and non-diaphragmatic hernia group were matched in a 1∶3 ratio with a caliper value of 0.02 by propensity score matching. Kaplan-Meier method was used for survival analysis and compared using the log-rank test for between-group differences. Results:The proportion of patients with diaphragmatic hernia after MIME who underwent surgical treatment was 6/16. Statistically significant differences were observed between the diaphragmatic hernia group and the non-diaphragmatic hernia group in terms of age ( χ2=16.057, P<0.01), BMI ( χ2=16.057, P<0.01), and tumor location ( χ2=12.048, P=0.002). Multivariate logistic regression analysis revealed that age ≥65 years ( OR=1.236, P=0.023) and BMI<25 kg/m2 ( OR=0.810, P<0.01) were independent risk factors for the development of diaphragmatic hernia after MIME. Survival analysis showed no significant difference in long-term survival between patients with and without diaphragmatic hernia after MIME ( P=0.187), and whether patients with diaphragmatic hernia underwent surgery was not associated with long-term prognosis ( P=0.560). Conclusion:Patients with BMI<25 kg/m 2 and age ≥65 years are independent risk factors for diaphragmatic hernia after MIME. The occurrence of diaphragmatic hernia is not associated with prognosis, and whether patients with diaphragmatic hernia undergo surgery does not affect the prognosis.

Objective:To explore the related risk factors of diaphragmatic hernia after thoraco-laparoscopic minimally invasive Mckeown esophagectomy (MIME).Methods:This is a retrospective controlled study. A retrospective analysis was conducted on the clinical data of patients who underwent MIME at the Department of Thoracic Surgery, Fourth Hospital of Hebei Medical University, from January 2016 to December 2023. A total of 619 patients were included. There were 423 males and 196 females, aged (63.7±7.6) years (range: 37 to 87 years). The diagnosis of diaphragmatic hernia after MIME was made based on clinical symptoms and CT scans. Patients were divided into two groups: the diaphragmatic hernia group ( n=16) and the non-diaphragmatic hernia group ( n=603). Clinical data, including age, gender, body mass index (BMI), smoking history, tumor location (upper, middle, and lower thoracic esophagus), preoperative neoadjuvant therapy history, and tumor staging, were collected and analyzed. A BMI of 25 kg/m2 and age of 65 years were used as cutoff values. The χ2 test and Fisher′s exact test were used to compare the data between the two groups, and Logistic regression was employed for risk factor analysis. The diaphragmatic hernia group and non-diaphragmatic hernia group were matched in a 1∶3 ratio with a caliper value of 0.02 by propensity score matching. Kaplan-Meier method was used for survival analysis and compared using the log-rank test for between-group differences. Results:The proportion of patients with diaphragmatic hernia after MIME who underwent surgical treatment was 6/16. Statistically significant differences were observed between the diaphragmatic hernia group and the non-diaphragmatic hernia group in terms of age ( χ2=16.057, P<0.01), BMI ( χ2=16.057, P<0.01), and tumor location ( χ2=12.048, P=0.002). Multivariate logistic regression analysis revealed that age ≥65 years ( OR=1.236, P=0.023) and BMI<25 kg/m2 ( OR=0.810, P<0.01) were independent risk factors for the development of diaphragmatic hernia after MIME. Survival analysis showed no significant difference in long-term survival between patients with and without diaphragmatic hernia after MIME ( P=0.187), and whether patients with diaphragmatic hernia underwent surgery was not associated with long-term prognosis ( P=0.560). Conclusion:Patients with BMI<25 kg/m 2 and age ≥65 years are independent risk factors for diaphragmatic hernia after MIME. The occurrence of diaphragmatic hernia is not associated with prognosis, and whether patients with diaphragmatic hernia undergo surgery does not affect the prognosis.

Background: Several risk factors have been identified that compromise the treatment outcome in patients with early-to-mid-stage cervical cancer (CC) who are primarily treated with radical surgery. However, there is no report on the impact of intraoperative frozen pathology examination of vaginal margins on the prognosis of patients with CC. This study aimed to conduct a randomized controlled trial (RCT) to determine whether selective vaginal resection can reduce the incidence of operative complications and the risk of postoperative radiotherapy. The impact of the length of the vagina removed in radical hysterectomy (RH) on prognosis and quality of life (QoL) for IB2–IIA2 CC patients will be investigated. Methods A multicenter, non-inferiority, RCT at 7 institutions in China is designed to investigate the effect of intraoperative frozen pathology exam of vaginal margin in RH on the survival outcomes for patients with IB2–IIA2 CC. Eligible patients aged 18–70 years will be randomly assigned online by one-to-one random allocation to receive intraoperative frozen pathology exam of vaginal margin or not. If frozen pathology indicates positive margin, continue resection of 1 centimeter of vaginal tissue until negative margin is achieved. The primary end point is 2-year disease-free survival (DFS). Adverse events (AEs) caused by further vagina resection, 5-year DFS, 2-year overall survival (OS), 5-year OS and AEs caused by radiotherapy and QoL are secondary end points. A total of 310 patients will be enrolled from 7 tertiary hospitals in China within 3-year period and followed up for 5 years.Trial Registration: Chinese Clinical Trial Registry Identifier: ChiCTR2000035668

Background: Several risk factors have been identified that compromise the treatment outcome in patients with early-to-mid-stage cervical cancer (CC) who are primarily treated with radical surgery. However, there is no report on the impact of intraoperative frozen pathology examination of vaginal margins on the prognosis of patients with CC. This study aimed to conduct a randomized controlled trial (RCT) to determine whether selective vaginal resection can reduce the incidence of operative complications and the risk of postoperative radiotherapy. The impact of the length of the vagina removed in radical hysterectomy (RH) on prognosis and quality of life (QoL) for IB2–IIA2 CC patients will be investigated. Methods A multicenter, non-inferiority, RCT at 7 institutions in China is designed to investigate the effect of intraoperative frozen pathology exam of vaginal margin in RH on the survival outcomes for patients with IB2–IIA2 CC. Eligible patients aged 18–70 years will be randomly assigned online by one-to-one random allocation to receive intraoperative frozen pathology exam of vaginal margin or not. If frozen pathology indicates positive margin, continue resection of 1 centimeter of vaginal tissue until negative margin is achieved. The primary end point is 2-year disease-free survival (DFS). Adverse events (AEs) caused by further vagina resection, 5-year DFS, 2-year overall survival (OS), 5-year OS and AEs caused by radiotherapy and QoL are secondary end points. A total of 310 patients will be enrolled from 7 tertiary hospitals in China within 3-year period and followed up for 5 years.Trial Registration: Chinese Clinical Trial Registry Identifier: ChiCTR2000035668

Background: Several risk factors have been identified that compromise the treatment outcome in patients with early-to-mid-stage cervical cancer (CC) who are primarily treated with radical surgery. However, there is no report on the impact of intraoperative frozen pathology examination of vaginal margins on the prognosis of patients with CC. This study aimed to conduct a randomized controlled trial (RCT) to determine whether selective vaginal resection can reduce the incidence of operative complications and the risk of postoperative radiotherapy. The impact of the length of the vagina removed in radical hysterectomy (RH) on prognosis and quality of life (QoL) for IB2–IIA2 CC patients will be investigated. Methods A multicenter, non-inferiority, RCT at 7 institutions in China is designed to investigate the effect of intraoperative frozen pathology exam of vaginal margin in RH on the survival outcomes for patients with IB2–IIA2 CC. Eligible patients aged 18–70 years will be randomly assigned online by one-to-one random allocation to receive intraoperative frozen pathology exam of vaginal margin or not. If frozen pathology indicates positive margin, continue resection of 1 centimeter of vaginal tissue until negative margin is achieved. The primary end point is 2-year disease-free survival (DFS). Adverse events (AEs) caused by further vagina resection, 5-year DFS, 2-year overall survival (OS), 5-year OS and AEs caused by radiotherapy and QoL are secondary end points. A total of 310 patients will be enrolled from 7 tertiary hospitals in China within 3-year period and followed up for 5 years.Trial Registration: Chinese Clinical Trial Registry Identifier: ChiCTR2000035668

Objective:To compare the efficacy of robot assisted laparoscopic partial nephrectomy (RAPN) and laparoscopic partial nephrectomy (LPN) in the treatment of pediatric renal tumors.Methods:A retrospective analysis was conducted on the clinical data of 29 children with renal tumors admitted to Xinhua Hospital from March 2019 to March 2024. Among them, there were 10 cases in the RAPN group, including 6 males and 4 females; The median age is 7.5 (4, 12) years old, with a tumor diameter of (4.3±1.6) cm, a median R. E. N. A.L. score of 9 (8, 11), and relative tumor size (tumor volume/contralateral kidney volume) of (34.0%±19.3%). There were 19 cases in the LPN group, 8 males and 11 females; the median age is 5.0(4, 11) years old, with a tumor diameter of (4.4±1.6) cm, a median R. E. N. A.L. score of 9 (8, 11), and relative tumor size(37.7%±18.1%). There was no statistically significant difference in preoperative characteristics between the two groups ( P>0.05). Both groups underwent partial nephrectomy, with renal artery occlusion and then warm ischemia. Clinical data from both groups during and postoperatively were compared, and a simple linear regression analysis was utilized to assess the correlation between the relative size of the tumor and the duration of intraoperative warm ischemia. Results:All 29 cases underwent a successful surgery. Compared with the LPN group, the total surgery time in the RAPN group was (115.0±28.4) minutes versus (127.9±28.2) min( P=0.25); the warm ischemia time was (20.9±3.0) min versus (27.0±4.5) min, respectively( P<0.01); the intraoperative bleeding was (50.0±24.5) ml and (80.0±21.2) ml( P<0.01); the difference in hemoglobin level before and after surgery was (10.3±3.5) g/L versus (12.9±2.7) g/L( P<0.05), respectively; the median postoperative drainage time was 3.5 (3, 4) days versus 4.0(3, 6) days( P=0.17); the median postoperative hospital stay was 4.5 (4, 8) days versus 6.0(5, 10) days( P<0.05). There were 3 cases of renal cell carcinoma associated with the MiT family translocation, 2 cases of mixed epithelial and stromal tumors, and 2 cases of cystic nephroma by postoperative pathological examination in the RAPN group. There were 10 cases of nephroblastoma, 3 cases of teratoma, 2 cases of renal cell carcinoma associated with the MiT family translocation, 2 cases of metanephric adenoma, 1 case of unclassified renal cell carcinoma, and 1 case of cystic nephroma in the LPN group. Apart from one child in the LPN group who developed a postoperative fever over 39℃, no other severe complications occurred during or after the surgery in the remaining patients. Compared with preoperative parameters, eGFR decreased (8.9±18.9) ml/(min·1.73m 2) and (21.4±34.8) ml/(min·1.73m 2) in the RAPN group and LPN group, respectively, 1 month postoperatively( P=0.36); three months after surgery, eGFR was followed up, and the RAPN group and LPN group showed a decrease of (5.9±23.4) ml/(min·1.73m 2) and (13.9±20.1) ml/(min·1.73m 2) compared with preoperative levels, respectively( P=0.42). Linear regression analysis indicated that in the LPN group, intraoperative warm ischemia time exhibited a progressively increasing trend with the augmentation of the tumor's relative size, and warm ischemia time = 0.1688×tumor relative size+ 20.64, ( R2=0.46, P<0.01). Based on this, it is estimated that when the tumor's relative size exceeds 55.5%, the intraoperative warm ischemia time often surpassed 30 minutes. However, in the RAPN group, this trend is not statistically significant (P>0.05). Conclusions:Both LPN and RAPN are safe and feasible for the treatment of pediatric renal tumors. Compared with LPN, RAPN surgery has advantages of shortening warm ischemia time and reducing intraoperative bleeding, which helps patients recover early. RAPN is a better choice for children with a relative renal tumors size over 55.5%.

Objective:To compare the efficacy of robot assisted laparoscopic partial nephrectomy (RAPN) and laparoscopic partial nephrectomy (LPN) in the treatment of pediatric renal tumors.Methods:A retrospective analysis was conducted on the clinical data of 29 children with renal tumors admitted to Xinhua Hospital from March 2019 to March 2024. Among them, there were 10 cases in the RAPN group, including 6 males and 4 females; The median age is 7.5 (4, 12) years old, with a tumor diameter of (4.3±1.6) cm, a median R. E. N. A.L. score of 9 (8, 11), and relative tumor size (tumor volume/contralateral kidney volume) of (34.0%±19.3%). There were 19 cases in the LPN group, 8 males and 11 females; the median age is 5.0(4, 11) years old, with a tumor diameter of (4.4±1.6) cm, a median R. E. N. A.L. score of 9 (8, 11), and relative tumor size(37.7%±18.1%). There was no statistically significant difference in preoperative characteristics between the two groups ( P>0.05). Both groups underwent partial nephrectomy, with renal artery occlusion and then warm ischemia. Clinical data from both groups during and postoperatively were compared, and a simple linear regression analysis was utilized to assess the correlation between the relative size of the tumor and the duration of intraoperative warm ischemia. Results:All 29 cases underwent a successful surgery. Compared with the LPN group, the total surgery time in the RAPN group was (115.0±28.4) minutes versus (127.9±28.2) min( P=0.25); the warm ischemia time was (20.9±3.0) min versus (27.0±4.5) min, respectively( P<0.01); the intraoperative bleeding was (50.0±24.5) ml and (80.0±21.2) ml( P<0.01); the difference in hemoglobin level before and after surgery was (10.3±3.5) g/L versus (12.9±2.7) g/L( P<0.05), respectively; the median postoperative drainage time was 3.5 (3, 4) days versus 4.0(3, 6) days( P=0.17); the median postoperative hospital stay was 4.5 (4, 8) days versus 6.0(5, 10) days( P<0.05). There were 3 cases of renal cell carcinoma associated with the MiT family translocation, 2 cases of mixed epithelial and stromal tumors, and 2 cases of cystic nephroma by postoperative pathological examination in the RAPN group. There were 10 cases of nephroblastoma, 3 cases of teratoma, 2 cases of renal cell carcinoma associated with the MiT family translocation, 2 cases of metanephric adenoma, 1 case of unclassified renal cell carcinoma, and 1 case of cystic nephroma in the LPN group. Apart from one child in the LPN group who developed a postoperative fever over 39℃, no other severe complications occurred during or after the surgery in the remaining patients. Compared with preoperative parameters, eGFR decreased (8.9±18.9) ml/(min·1.73m 2) and (21.4±34.8) ml/(min·1.73m 2) in the RAPN group and LPN group, respectively, 1 month postoperatively( P=0.36); three months after surgery, eGFR was followed up, and the RAPN group and LPN group showed a decrease of (5.9±23.4) ml/(min·1.73m 2) and (13.9±20.1) ml/(min·1.73m 2) compared with preoperative levels, respectively( P=0.42). Linear regression analysis indicated that in the LPN group, intraoperative warm ischemia time exhibited a progressively increasing trend with the augmentation of the tumor's relative size, and warm ischemia time = 0.1688×tumor relative size+ 20.64, ( R2=0.46, P<0.01). Based on this, it is estimated that when the tumor's relative size exceeds 55.5%, the intraoperative warm ischemia time often surpassed 30 minutes. However, in the RAPN group, this trend is not statistically significant (P>0.05). Conclusions:Both LPN and RAPN are safe and feasible for the treatment of pediatric renal tumors. Compared with LPN, RAPN surgery has advantages of shortening warm ischemia time and reducing intraoperative bleeding, which helps patients recover early. RAPN is a better choice for children with a relative renal tumors size over 55.5%.

Nanocrystals are nanoscale (1-1000 nm) dispersion systems in which small numbers of surfactants or polymers are used as stabilizers to disperse insoluble drug particles in water or oil. Nanocrystals enjoy not only high drug content, but also a simple and mature preparation process. At present, 24 nanocrystals products that have been marketed mainly focus on enhancing the solubility and bioavailability of poorly soluble drugs. And recent years have witnessed an increasing number of research reports on target drug delivery of nanocrystals through particle size control and surface modification. This paper mainly introduces three targeting strategies for prolonging the in vivo circulation time of nanocrystals, increasing the affinity for tumor cells and achieving the response to internal and external stimuli, and discusses the current challenges in the application of nanocrystal technology to targeted anti-tumor drugs.

Objective: To analyze the epidemiological characteristics of coronavirus disease 2019 （COVID-19） cases reported in Ningbo from January 22 to February 22, 2020, so as to provide guidance for the prevention and control of the COVID-19 epidemic. Methods: The confirmed cases of COVID-19 reported by Ningbo were selected from National Diseases Prevention and Control Information System to analyze the epidemiological characteristics by descriptive epidemiological method, including time, spatial and population distribution, clinical symptoms and exposure history. Results: A total of 157 confirmed cases of COVID-19 were reported and there was no death. The first confirmed case was reported on January 22. On the incidence curve, the peak was from January 22 to February 4, with a maximum of 15 cases in a single day. The incidence curve presented sustained human-to-human transmission. The number of the cases showed a declining trend from February 5. The confirmed cases were reported in all 10 counties（cities or districts）,among which 69（43.95%）cases were reported in Haishu District. The confirmed cases were mainly 30-69 years old,accounting for 78.34%;were mainly farmers,household workers and retired people,accounting for 59.87%;and were mainly clinically mild,accounting for 87.90%.There were 51 imported cases, accounting for 32.48%. The initial confirmed case was a local case. In the early stage of the epidemic, local cases and imported cases prevalent together,which was due to the outbreak caused by the large-scale buddhist activity on January 19.This event resulted in 67 confirmed cases and 15 asymptomatic cases. There totally reported 22 clusters with 138 （87.90%）confirmed cases. Conclusions In the early stage of the COVID-19 epidemic in Ningbo, the imported cases and local cases prevalent at the same time. Most of the cases were female, aged from 30 to 69 years, and their occupation were farmers, household workers and retired people. With comprehensive measures taken, the epidemic of COVID-19 in Ningbo have been under control.

Objective To discuss the improvement of the seven steps of exercise rehabilitation to improve the cardiac function of patients with acute myocardial infarction after percutaneous coronary intervention(PCI),making patients to take care of themselves as early as possible. Methods A total of 60 cases of patients with acute myocardial infarction after stent implantation were selected to be admitted to our hospital from January to December 2016,using the random number table method to divide into the rehabilitation group (30 cases) and the control group (30 cases). The control group received PCI routine nursing and the rehabilitation group received seven steps of rehabilitation training. The left ventricular ejection fraction(LVEF)of the two groups was observed one day after operation.The LVEF and self-care ability of the two groups were observed nine days after operation. The evaluation of cardiac function adopted the heart color ultrasound, and the improved Barthel Index (MBI) was adopted in life self-care ability. Results The first day after surgery,the incidence rate of LVEF below 50% in the rehabilitation group and control group were 53.30%(16/30)and 50.00%(15/30)respectively.There was no statistically significant difference between the two groups (χ2= 0.067, P > 0.05), the ninth day after surgery, the incidence rate of LVEF below 50% in the rehabilitation group and control group were 26.70%(6/30)and 46.70% (14/30), the two groups had statistically significant difference (χ2= 4.800, P < 0.05). The MBI scores of the recovery group and the control group were respectively 80.167 ± 4.111 and 64.200 ± 3.145 respectively.The two groups had statistically significant difference(t=16.896,P<0.01). Conclusions The rehabilitation training can significantly improve the cardiac function and self-management ability of patients after myocardial infarction,and can be used in clinic.