Objective To investigate the dosimetric influence of dwell weight standard deviation (DWSD) and applicator displacement in cervical cancer patients treated with three-dimensional brachytherapy.Methods A total of 20 cervical cancer patients who had completed radical treatment were selected in this study.The Fletcher applicator (Nucletron#189.730) was used for these patients.A new plan,based on the former CT images and structures,was designed for each patient.In former and new plans,dwell weight was recorded,and DWSD was calculated.Two groups,low-DWSD (LDWSD,0.141-0.299) and high-DWSD (HDWSD,0.211-0.337),were set according to the DWSD size for the two plans.Dosimetric effects from ± 1 mm displacement of tandem applicator or ovoid applicator were simulated with Oncentra (R) Brachy V4.3 treatment planning system.D100,D90,and V150 for clinical target volume (CTV)and D0.1cc,D1cc,and D2cc for the bladder,rectum,and sigmoid were evaluated.Dosimetric comparisons were made between the LDWSD group and HDWSD group to study the dosimetric effects of DWSD and applicator displacement in cervical cancer patients.Results The dosimetric effects from applicator displacement increased with increasing DWSD.If there was a 1 mm displacement of tandem applicator or ovoid applicator,D100,D90,and V150 of CTV were 3.0％,23.8％,and 4.8％ higher or 0.5％,1.2％,and 5.2％ higher in the HDWSD group than in the LDWSD group;D0.1cc,D1cc,and D2cc of the bladder and rectum were significantly higher in the HDWSD group than in the LDWSD group,particularly for the sigmoid (up 44.0％,22.8％,and 16.8％) and (up 10.3％,14.4％,and 12.4％).Conclusions DWSD should be considered in plan evaluation for cervical cancer patients treated with three-dimensional brachytherapy.The dosimetric influence from applicator displacement can be decreased by reducing DWSD properly.

Objective To investigate the clinical efficacy of short segment fixation with percutaneous pedicle screws or traditional open surgery for the type A1-A3 thoracolumbar compression fracture.Methods A retrospective case control study was conducted on the clinical data of 64 patients with thoracolumbar compression fracture admitted to Shanxi Dayi Hospital between January 2012 and February 2017.There were 44 males and 20 females,aged 21-65 years [(45.4 ± 11.1) years].There was one patient with injured segment at T11,29 at T12,27 at L1 and seven at L2.According to AO typing,there were 39 patients classified as Type A1,two as Type A2 and 23 as Type A3.The patients were divided into minimally invasive surgery group (n =37) and open surgery group (n =27).Minimally invasive surgery group was treated with minimally invasive percutaneous pedicle screw fixation and open reduction.The open surgery group was treated with traditional open pedicle screw short segment fixation and open reduction.The operation time,intraoperative blood loss,total hospitalization time,postoperative hospitalization time,visual analogue scale (VAS) before and after operation,local kyphosis of the fractured vertebra,segmental kyphosis and complications in two groups were recorded.Results All patients were followed up for 12-29 months,with an average of 13.2 months.Between the minimally invasive surgery group and open surgery group,no significant difference was found in the operation time [(106.4± 37.3) minutes vs.(131.3 ± 33.6) minutes] (P ＞ 0.05),and significant differences were found in intraoperative blood loss [(71.2 ± 34.9) ml vs.(409.3 ± 267.5) ml],total hospitalization time [(11.7 ± 7.2) days vs.(21.6 ± 12.8) days] and postoperative hospitalization time [(8.1 ± 7.4) days vs.(16.6 ± 10.6) days] (P ＜ 0.05).In the minimally invasive surgery group,VAS was (6.5 ±1.1) points preoperatively and was (2.3 ± 0.7) points and (1.0 ± 0.3) points immediately after operation and at final follow-up.In the open surgery group,VAS was (6.9 ± 1.0)points preoperatively and was (4.2 ± 1.0) points and (0.9 ± 0.4) points immediately after operation and at final follow-up (P ＜0.05).Compared with the preoperative VAS,those immediately after operation and at final follow-up were significantly decreased within the two groups (P ＜ 0.05).There were no significant differences in the preoperative VAS and VAS at final follow-up between the two groups (P ＞ 0.05),but significant difference was found in VAS immediately after operation between the two groups (P ＜ 0.05).In the minimally invasive surgery group,the local kyphosis of the fractured vertebra was (19.3 ± 3.8) °preoperatively,(3.4 ± 1.7) ° immediately after operation,and (4.6 ± 1.9) ° at final follow-up.In the open surgery group,the local kyphosis of the fractured vertebra was (19.6 ± 6.8) ° before operation,(1.6 ± 0.8) ° immediately after operation,and (2.4 ± 1.1) ° at final follow-up.The kyphosis of fractured vertebra immediately after operation and at final follow-up were significantly decreased within the two groups compared with the preoperative kyphosis(P ＜0.05),but no significant differences were found between the two groups (P ＞ 0.05).In the minimally invasive surgery group,the segmental kyphosis Cobb angle was (16.1 ± 9.1) ° before operation,(3.0-± 1.8) ° immediately after operation,and (5.9 ±1.8) ° at final follow-up.In the open surgery group,the segmental kyphosis Cobb angle was (15.2±12.0) ° before operation,(3.1 ± 1.4) ° immediately after operation,and (5.6 ± 2.1) ° at final follow-up.The segmental kyphosis Cobb angle immediately after operation and at final follow-up were significantly decreased within the two groups compared with the preoperative Cobb angle (P ＜ 0.05),but no significant differences were found between the two groups (P ＞ 0.05).No spinal cord injuries because of pedicle screws were observed after operation in either group.In the open surgery group,there was one patient with wound infection who recovered after dressing change,and no infection case was found in the minimally invasive surgery group.Conclusion For type A1-A3 thoracolumbar compression fractures,both the minimally invasive posterior pedicle screw fixation and the traditional open pedicle screw fixation can achieve satisfactory near-term results,and the former is better in intraoperative blood loss,immediate relief of pain after operation and shorter hospital stay than the latter.

Objective:To analyze the long-term efficacy of percutaneous kyphoplasty (PKP) assisted with vitamin D in the treatment of elderly thoracolumbar single vertebral osteoporotic vertebral compression fractures (OVCF) and its effect on transfected bone morphogenetic protein-Effects of 7 (BMP-7) /25-hydroxyvitamin D3 [ (25- (OH) -D3] levels.Methods:106 elderly patients with fresh OVCF of thoracic and lumbar vertebrae who were treated with PKP in Li Huili Hospital of Ningbo Medical Center from Jun. 2017 to Jun. 2021 were selected as the research object, and they were divided into two groups according to the random number table method (53 cases in each group) . Both groups were treated with PKP and received conventional anti-osteoporosis treatment and rehabilitation training. On this basis, patients in the treatment group were given vitamin D therapy. Before treatment and 1, 3, 6, and 12 months after treatment, the degree of pain improvement, Cobb angle improvement, bone mineral density, vertebral body compression rate, vertebral body function recovery and serum BMP-7, 25- (OH) -D3 level, and the cement leakage rate of all subjects within 1 year of follow-up was recorded.Results:Two patients in the observation group and 3 patients in the control group lost to follow-up. Comparing the results of before treatment and 12 months after treatment: the control group’s BMD increased from 0.585±0.042 to 0.755±0.0641; BMP-7 increased from 80.02±6.24 to 129.87±10.52;25- (OH) -D3 increased from 9.15±2.16 to 13.52±2.64;and the treatment group’s BMD increased from 0.576±0.039 to 0.868±0.079; BMP-7 increased from 78.36±6.20 to 153.41±12.70; 25- (OH) -D3 increased from 9.01±2.12 to 16.24±2.81; the treatment group had higher increase ( P<0.05) . Meanwhile the control group’s Cobb angle decreased from 13.54±1.81 to 8.05±1.05; vertebral body compression rate decreased from 28.41±3.47 to 19.86±2.29; ODI score decreased from 74.42±7.37 to 24.08±2.41; VAS score decreased from7.54±0.81 to 2.65±0.25,and the treatment group’s Cobb angle decreased from 13.70±1.89 to 7.42±0.97;vertebral body compression rate decreased from 28.97±3.62 to 18.86±2.02; ODI score decreased from75.78±7.43 to 21.39±2.08; VAS score decreased from7.70±0.891 to 2.32±0.20,while the treatment group decreased more ( P<0.05) . In addition, the vertebral refracture rate in the control group was 22.00% (11/50) , while the vertebral refracture rate in the treatment group was 5.88% (3/51) , and there was a significant difference between the groups ( χ 2=5.125, P=0.024) . Conclusion:PKP combined with vitamin D in the treatment of elderly thoracolumbar OVCF can significantly improve the levels of BMP-7 and 25- (OH) -D3, better restore bone mineral density, vertebral body function and correct kyphosis, with a more ideal long-term efficacy.

Objective:To compare the efficacy of single kidney transplantation for children from pediatric donors between body weight ≤15 kg and >15 kg.Methods:A retrospective review in 156 children with single donor kidney transplantation from August 2010 to December 2019 in the Kidney Transplantation Department of the First Affiliated Hospital of Zhengzhou University was conducted. The patients were classified into the small kidney group (pediatric donor body weight ≤15 kg) and the big kidney group (pediatric donor body weight >15 kg). In this study, 89 cases were concluded in the small kidney group and 67 cases were concluded in the big kidney group. The donor kidneys were obtained from 46 cases of small weight (≤15 kg) pediatric donors and 48 cases of large weight (>15 kg) pediatric donors. There were significant differences in age [1.00 (0.02 - 4.00) years vs. 10.00 (3.00-18.00) years], body weight [10.0 (3.4 - 15.0) kg vs. 35.0 (16.2- 35.0) kg], height [76 (50- 113) cm vs. 144 (67-172) cm], GFR [(31.50±7.46)ml/min vs. (36.79±7.00) ml/min], and renal length to diameter [(5.91±0.48) cm vs. (8.71±1.88) cm] between the small kidney group and the big kidney group ( P < 0.01). There was no significant difference between the two groups of donors in gender, cold/warm ischemia time and cause of death ( P>0.05). There were significant differences in age [(11.28±3.89) years vs. (13.86±3.56) years], body weight [(31.83±10.45)kg vs. (35.13±9.15) kg], and height [(130.02±28.56) cm vs. (143.97±16.59) cm] between recipients of the small kidney group and big kidney group ( P < 0.05). While there were no significant differences in preoperative serum creatinine level [(822.65 ± 135.04) μmol/L vs. (777.31 ± 165.40) μmol/L], HLA mismatch [(3.4 ± 1.4) site vs. (3.2±1.3) site], and primary disease between the two groups ( P > 0.05). The recovery of renal function, postoperative adverse events, postoperative children, and graft survival were compared between the two groups. Results:The renal function of the two groups of recipients returned to normal 3 months after operation. The perioperative complications in the small kidney group and the big kidney group mainly included renal delayed recovery [5.6% (5/89) vs. 7.5% (5/67), P=0.89], renal vascular embolization [3.4% (3/89) vs. 0, P=0.35], and acute rejection [2.2% (2/89) vs. 4.3% (3/67) , P=0.75]. The main cause of recipient death during the follow-up period was pulmonary infection [4.5% (4/89) vs. 6.0% (4/67) , P=0.68]. The postoperative small kidney group was followed up for an average of 30 (3-74) months. The survival rates of children in the small kidney group at the 1, 3 and 5 years after surgery were 96.6% (86/89), 91.0% (81/89) and 91.0%(81/89), while the transplanted renal survival rates were 92.1% (82/89), 86.5% (77/89) and 84.2% (75/89), respectively. The postoperative big kidney group was followed up for an average of 32 (4-89 ) months. The survival rates of children in the big kidney group were 95.5% (64/67), 94.0% (63/67) and 91.0%(61/67) in the first 1, 3 and 5 years postoperatively, while the graft survival rates were 92.5% (62/67), 83.6% (56/67) and 83.6% (56/67), respectively. The postoperative kidneys of two groups were fast-growing, and there was no significant difference between the small kidney group and the big kidney group in graft length to diameter [(9.63±0.31) cm vs. (9.75±0.71) cm] after 1 year ( P>0.05). Conclusions:The effect of single pediatric kidney transplantation for pediatric donor with body weight ≤15 kg is equivalent to that for pediatric donor with body weight >15 kg , which can be carried out clinically.

Objective To explore the method of how to design and apply informationalized system to intraoperative conversation, so as to improve efficiency and quality of operation. Methods We focused on the inconvenience communication links existed in the whole operation process between medical staffs and patients′family members as well as pathological specimens displaying. We designed informationalized intraoperative conversation system, and optimized the conversation program. Results The informationalized intraoperative conversation system actualized remote video intercom with relatives and video transmission, which standardized work processes. Compared with traditional methods, the communication time between the medical staffs and patient′s family members was shortened from (13. 81 ± 3. 92) min to (5. 04 ± 2. 14) min, meanwhile the satisfaction of patients′family members improved from (84.00 ±2.66) % to (96.00 ±1.53) % (t=8.725, 19.73;P<0.05). Conclusions The application of intraoperative conversation system can improve work efficiency, reduce the risks of nosocomial infection; close the relationship between medical staffs and patients and protect the patients privacy;it also can play a positive role in protecting the medical staff′s safety.

Objective:To explore the efficacies of single-center pediatric transplantations and discuss the current problems.Methods:From July 2007 to September 2019, the clinical data of 202 children (aged ≤17 years) undergoing renal transplantation were reviewed. And their perioperative complications, transplantation outcomes and patient/kidney survival were analyzed.Results:The most common perioperative complication was delayed graft function (DGF)( n=24, 11.9%), recurrence of renopathy ( n=8, 4.0%) and acute rejection ( n=21, 10.4%). The major causes of death and graft failure were lung infection ( n=9, 4.5%) and rejection ( n=11, 5.4%). Perioperative serum creatinine decreased progressively from (816.1±303.1) μmol/L preoperatively to (62.7±20.6) μmol/L at Month 3 post-operation. The value of eGFR were (166.8±37.3), (135.1±29.0) and (109.9±31.1) ml/(min·1.73 m 2) at Year 1/3/5 post-operation respectively. The survival rates were 96.7%, 96.3%, 94.1%, 93.5%, 94.1% and 90.7% at Year 1/3/5 post-operation respectively. No difference existed in human/kidney survival rate between LD and DD groups at Year 1/3/5 post-operation ( P>0.05) and transplantation outcomes were excellent. Conclusions:Effective and successful outcomes have been achieved at our center. And further optimizations are required for resolving various problems.

Objective To evaluate the clinical efficacy of en-bloc kidney transplantation from pediatric organ donation after death. Methods Clinical data of donors and recipients undergoing en-bloc kidney transplantation from pediatric donor kidneys were retrospectively analyzed. The 1-year survival rates of the recipient and grafted kidney were calculated. The recovery of renal function at postoperative 1 year was observed. The changes in the length of grafted kidney and incidence of postoperative adverse events were monitored. Results The 1-year survival rate of the recipients was 8/9, and 72% for the grafted kidney. During 1-year follow-up, the serum creatinine (Scr) level was down-regulated from (747± 170) μmol/L before transplantation to (83±27) μmol/L post-transplantation, the blood urea nitrogen concentration was decreased from (24.5±4.9) mmol/L to (6.8±2.0) mmol/L, and the length of transplanted kidney was increased from (61.1±9.8) mm to (100.3±1.7) mm. Two recipients suffered from delayed graft function(DGF) and restored after hemodialysis. Two cases developed acute rejection and healed after methylprednisolone shock therapy. One recipient presented with lung fungal infection at postoperative 2 weeks after transplantation, and was treated by the withdrawal of immunosuppressive agents and antibacterial treatment with poor clinical efficacy. Then the recipient died at 3rd month. One case had renal arterial thrombosis at postoperative 7 d, underwent nephrectomy at postoperative 10 d and returned to hemodialysis. At postoperative 1st month, one recipient suffered from thrombosis of unilateral renal artery. The grafted kidney in other side normally functioned and significantly grew in size at postoperative 6 months. In addition, two cases had ureterostenosis of the transplanted kidney, albuminuria in 2, abdominal aortic stenosis in 1 and urinary fistula in 1. All these symptoms were cured or alleviated after corresponding treatment. Conclusions The incidence of perioperative complications is relatively high in en-bloc kidney transplantation from pediatric organ donation after death, whereas the clinical efficacy of such kidney transplantation can be gradually increased along with the accumulation of clinical experience.

Objective To investigate the clinical significance of serum and urinary levels of neutrophil gelatinase-associated lipocalin (NGAL ) for evaluating changes of residual renal function after living donor kidney resection under different operation model in young versus elderly patients. Methods The clinical data of renal transplants were retrospectively analyzed by successfully using 66 living-related donors at the First Affiliated Hospital of Zhengzhou University from September 2016 to October 2017. According to the operation model and age ,renal donors were divided into 4 groups :group A (young/open) ,group B (young/laparoscopic) ,group C (aged/open) ,and group D (aged/laparoscopic).Blood and urinary NGAL and serum levels of creatinine ,cystatin C ,and other indices of renal function were assayed and collected before and at 1 ,3 ,7 days after operation. Results Both blood NGAL levels and urinary NGAL levels showed no statistically significant difference (all P>0.05) among four groups both before and after operation ,except that urinary NGAL was higher in group C (aged/open) than other groups ,at 1 day after operation ,(P = 0.03).The post-vs.pre-operation level dynamic changes of renal function were four or three times higher in urine or serum NGAL level than in serum creatinine or cystatin C level at 1 day after operation ,which showed an important role for predicting an early residual renal damage and relative treatment. Conclusions NGAL can be used as indices in evaluating changes of residual renal function after living donor kidney resection ,especially in the elderly receiving open kidney resection.

Objective To explore the long-term clinical effect of kidney transplantation in children.Methods The clinical data of 53 children with kidney transplantation from March 2008 to September 2014 were retrospectively analyzed.The influence of the dependent factors on the estimated glomerular filtration rate (eGFR) (greater than 90 mL/min/1.73 m2 or ＜90 mL/min/1.73 m2) was estimated in the three years after the operation,and the influencing factors were analyzed by the dual logistic regression equation.Results There were 19 cases of living donors,17 cases of organ donors after death,and 6 others.The 53 patients were followed up for 3-9 years.The level of blood creatinine was decreased from the preoperative (820.1 ± 323.1) μmol/L to (51.6 ± 24.9) μmol/L 3 years after the operation (P＜0.05).eGFR was increased to (103.5 ± 11.4) mL/min/1.73 m2at 3rd year after the operation from the preoperative (17.1 ± 7.8) mL/min/1.73 m2 (P＜0.05).The age of recipients,preoperative dialysis time,number of HLA mismatching and postoperative delayed graft function healing (DGF),rejection and infection were the influencing factors of eGFR at 3rd year postoperation (P＜0.05).The multi-factor binary logistic regression equation analysis showed that only rejection was the risk factor for eGFR at 3rd year p0ostoperation.Eight cases of DGF (8/53,15.1％) recovered rapidly.There were 6 cases of acute rejection (6/47,12.8 ％) and 1 case of chronic rejection (1/47,2.1％).There were 9 cases of infection (9/47,19.1％).There were 6 cases of recurrence after surgery.The 3-year recipient and kidney survival rate was 94.3％ (50/53) and 88.7％ (47/53) respectively.The average height of the patients in the first,second and third year after the surgery was increased by (4.6 ± 1.9) cm (0.5-19.1 cm),(3.7 ± 1.8) cm (0.7-14.3 cm) and (2.8± 1.2) cm (0.3-8.7 cm) respectively.Conclusion The long-term effect of children kidney transplantation is satisfactory.

Objective:To evaluate the time-zero biopsy of donor kidney with acute kidney injury(AKI)in organ donation donors and examine the clinical effect after transplantation.Methods:From May 2019 to May 2020, clinical data were retrospectively reviewed for 104 donors assessed by time-zero biopsy at First Affiliated Hospital, Zhengzhou University.According to the definition of AKI and Banff2016 criteria, the kidneys of 104 donors were grouped and evaluated for transplantation.And the post-transplantation effects of donor kidneys with different degrees of pathological changes were analyzed.Results:AKI occurred in 32/104 donors.Compared with non-AKI donors, statistically significant differences existed in degrees of renal interstitial fibrosis and acute renal tubular injury ( P<0.05). However, there were no significant differences in other pathological manifestations ( P>0.05). In AKI group, kidneys of 2 donors with Banff score>3 were abandoned; in non-AKI group, among 12 donors with Banff score>3, 1 donor kidney was abandoned due to a high degree of chronic diseases.No significant inter-group difference existed in creatinine value or estimated glomerular filtration rate(eGFR)( P>0.05). AKI group had a higher incidence of postoperative delayed graft function(DGF)and longer duration.There was no statistical significance in other complications ( P>0.05). Conclusions:AKI donor kidneys with pathological manifestations below moderate renal tubular injury and Banff score<3 are feasible for transplantation.Although renal function recovery is slow after transplantation, safe outcomes may be obtained.