Objective To ensure the quality of live attenuated measles vaccine on the market,viral titers were determined as the market surveillance test.Methods The measles vaccine was sampled from sites located in 24 provinces (cities,autonomous regions) of China,including provincial CDC,municipal CDC,county CDC,and primary users.The virus titer of samples was tested to evaluate the quality status of measles vaccine on the market.Results For all the 54 lots of measles vaccine sampled in this study,the virus titers were in compliance with the requirements of the China Pharmacopeia Vol.III (2005 edition).In comparison with the original test results provided by the manufacturers,the mean virus titer was decreased 0.2 lg?0.3.Conclusion Viral titers of measles vaccine batches sampled from the market were all in compliance with the requirements of the China Pharmacopeia Vol.III (2005 edition).It showed that the measles vaccine in China market has good stability,and the cold chain system for measles vaccine conveyance and storage could ensure the vaccine efficacy.

Objective To investigate the influencing factors related to the complications of esophageal foreign body in children. Methods Data of 150 children with esophageal foreign bodies admitted to Xi'an Children' s Hospital from January 2012 to June 2015 were included in the retrospective analysis. Related clinical variables ( gender, age, location, time, size, sharpness, quality, and severity of complications) were statistically analyzed. Results Spearman correlation analysis showed that the age of children was negatively correlated with esophageal foreign body complications (r=-0. 187, P=0. 022), incarceration time ( r=0. 456, P<0. 001) , sharpness ( r=0. 384, P<0. 001) and quality ( r=0. 234, P=0. 004) was positively correlated with the incidence of complications. Non?conditional Logistic regression analysis for polytomous ordinal response showed that incarceration longer than 8 h yielded complication risks 9. 507 times as much as that less than 8 h ( 95%CI:2. 982?30. 309) . Obtuse or sharp foreign body yielded risk 142. 751 times as smooth foreign body did (95%CI:13. 736?1483. 562). Conclusion Incidence and severity of complications of esophageal foreign body in children are closely related to the age of the children, incarceration time and the degree of sharpness. For patients of less than 1 year old, incarceration for more than 8 hours, with an obtuse or sharp foreign body, early diagnosis and treatment is essential.

Objective To compare the efficacy of sevoflurane-remifentanil and propofol-remifentanil anesthesia in elderly patients undergoing radical gastrectomy for cancer.Methods Sixty ASA Ⅱ - Ⅲ patients aged 65-80 years old with gastric cancer were divided into sevoflurane group(group S) and propofol group (group P), 30 cases in each group.Perioperative hemodynamic variables, bispectral index( BIS ) values and the time of recovery from anesthesia, extubation and awake were recorded as well.Results Compared with those before anesthesia,diastolic blood pressure(DBP),mean arterial pressure(MAP), heart rate(HR) and BItS were signifieanfly decreased (P < 0.05 or < 0.01 ).SBP was higher at cutting skin in group S than that in group P (P < 0.05 ).The depths of anesthesia in both groups were maintained well with BIS in 45-60 and vital signs were stable during operation.The time of recovery from anesthesia, extubafion and awake were shorter in group S [(4.1±2.2),(5.4±2.1),(7.3±2.1)min]thanthoseingroupP [(7.5±3.2),(8.6± 4.2), ( 11.2 ± 4.1 ) min]( P < 0.05 or < 0.01 ).Conclusions Either sevoflurane-remifentanil and propofol-remifentanil anesthesia can be used safely in elderly patients undergoing radical gastrectomy for cancer.Sevotlurane-remifentanil combined with anesthesia provides better hemodynamic stability and faster recovery than propofol-remifentanil combined with anesthesia in elderly patients.

Objective To establish the universal antibody against all subtypes of the influenza A viral hemagglutinins(HA). Methods All HA sequences from influenza viruses in common domains were analyzed to search for the most conservative re,on of the HA gene. The peptides conjugated to carrier proteins were used to immunize rabbits in order to obtain high titer antibody. Results The most conservative region among all influenza viruses HA genes were 14 amino acids located at the N-terminal of HA2. The antibody titer reached to 1 : 80 000 after 4 injections of the coupled peptides. The achieved antibody was demonstrated by Western blot to bind HA proteins of influenza virus subtypes H1-H13 specifically. Conclusion The universal antibody has been successfully established by immunizing the rabbits with most conservative peptides of HA protein coupled to carrier protein.

Objective To compare the short term clinical efficacy of percutaneous resection and laparoscopic deroofing of renal cysts.Methods From October 2013 to June 2016,the data from 39 cases with renal cysts were followed for approximately 22 months (ranging 5-36 months).Patients were randomized into two groups.In the resectoscopic group(17 pts),the mean age of those patients was 57 years (ranging 34-81 years).The mean size of these cysts was 6.4cm (ranging 5.4-8.2 cm).The mean preoperative creatinine was 66.5μmol/L (ranging 38.1-108.8μ mol/L).The mean preoperative sodium was 141.4μ mol/L(ranging 135.6-145.1μmol/L).The mean preoperative potassium was 4.0μmol/L (ranging 3.4-4.7 μmol/L).In the latter laparoscope (22pts),the mean age of these patients was 60 years (ranging 46-73 years).The mean size of these cysts was 6.8cm (ranging 4.3-8.9cm).The mean preoperative creatinine was 74.8μmol/L (ranging 48.6-141.9μmol/L).The mean preoperative sodium was 141.5μmol/L(ranging 135.0-146.1 μmol/L).The mean preoperative potassium was 4.0μmol/L (ranging 3.1-4.8μmol/L).The operative time,blood loss,days of drainage,hospital stay and complications were compared with the two groups.Results All of the 39 cases were accepted the procedure successfully without open conversion.Compared the resectoscopic group with Laparoscopic,the mean operative time was 29.7 min (ranging 15-50 min) and 63.0min (ranging 20-1 00 min),mean blood loss was 36.6ml(ranging 10-80 ml) and 60.4ml(ranging 10-200 ml),days of drainage was 2.3 days and 3.1 days,hospital stay was 3.7 days and 5.1 days,the mean postoperative creatinine was 67.4 μmol/L(ranging 43.8-95.5 μmol/L) and 68.9μmol/L(ranging 46.5-157.6 μmol/L),the mean postoperative sodium was 141.2μmol/L(ranging 136.0-147.2 μmol/L) and 141.6 μmol/L(ranging 136.0-147.2 μmol/L),the mean postoperative potassium was 3.8 μmol/L (ranging 3.2-4.3 μmol/L) and 3.8μmol/L (ranging 3.3-4.3 μmol/L).The overall postoperative pathology was renal cysts.All cases were followed for approximately 19 months (ranging 6-35 months) and 22 months (ranging 5-36 months) in reseetoscopic and laparoscopic group respectively.No cysts recurrence was found by ultrasound.Conclusions Compared with laparoscopic deroofing,use of resectoscopic technology significantly enhances the possibility of achieving better intraoperative results in all patients with renal cysts.Percutaneous resection of simple renal cysts is safe and feasible.

Objective:To evaluate high resolution esophageal manometry (HREM) in peroral endoscopic myotomy (POEM) for pediatric achalasia of cardia (AC).Methods:Data of 30 AC children who received POEM in Xi′an Children′s Hospital from January 2013 to September 2019 were reviewed. HREM was performed before and 6 months after POEM. Preoperative and postoperative lower esophageal sphincter pressure (LESP), 4-second integrated relaxation pressure (4sIRP), Eckardt scores and nutritional status were compared.Results:Children with AC aged between 4-14 years. Postoperative LESP was 5.50±1.13 mmHg (1 mmHg=0.133 kPa), which was significantly lower than that before operation (26.23±4.47 mmHg) with significant difference ( t=-24.623, P<0.001). Postoperative median 4sIRP was 5 mmHg, which was 20 mmHg lower than that before operation (25 mmHg) with significant difference ( Z=-4.786, P<0.001). Postoperative median Eckardt symptom score decreased significantly compared with that before (1 VS 8, Z=-4.796, P<0.001). Severe malnutrition of the AC children improved evidently to normal( Z=-5.166, P<0.001). Conclusion:POEM can significantly improve the characteristics of esophageal dynamics in children with AC, and HREM can be an important indicator for follow-up evaluation of POEM.

OBJECTIVETo study the safety and immunogenicity of the measles-mumps-rubella combined vaccine (MMR) produced by Beijing Biological Product Institute.

METHODSChildren aged 10-12 years, 2-2.5 years and 8-12 months were selected to be vaccinated with Beijing MMR vaccine (test vaccine). Other groups of children with similar nature were vaccinated with measles vaccine, mumps vaccine and rubella vaccine while using imported MMR vaccine (control vaccine) as controls.

RESULTSThe safety of the Beijing MMR vaccine was confirmed after vaccinating 32 children above 2 years old. Among 104 children of 8-12 months were vaccinated with Beijing MMR vaccine, only 6.7% of the children had transient fever and 1.9% had signs of rashes but with no other signs observed. The positive seroconversion rates of measles, rubella and mumps anti-HI were 100%, 100% and 85.7% respectively. GMT also showed high lever.

CONCLUSIONThe MMR vaccine (Beijing) had good safety and immunogenicity which might be used to be the bases enhance immunization of measles.

Antibodies, Viral ; blood ; Child ; Child, Preschool ; Freeze Drying ; Hemagglutination Inhibition Tests ; Humans ; Measles-Mumps-Rubella Vaccine ; adverse effects ; immunology ; Vaccines, Attenuated ; adverse effects ; immunology

We have designed a new kind of self-locking intramedullary nail for the treatment of unstable fracture of the middle and distal tibial shaft and have compared it with the interlocking nail by means of biomechanical experiments. The data could be used as a basis for clinical application. Fourteen formalin-fixed tibials of adults were made into unstable fracture models with a 2cm bone defect each. They were divided into 2 groups. Group 1 was fixed with self-locking intramedullary nail and group 2 was fixed by interlocking nail. All specimens were submitted to biomechanical test. The data were analysed by t test. The results showed there is no difference in anti-bending stiffness between the self-locking intramedullary nail and the interlocking nail. The anti-rotating and anti-compressing stiffness of interlocking nail is slightly better than that of self-locking intramedullary nail, but still the firmmess of the self-locking intramedullary nail in resisting rotation can meet the requirement of biological fixation. Its structure is reasonable, simple, practical, and it can resist certain harmful stress.
Biomechanical Phenomena ; Bone Nails ; Fracture Fixation, Intramedullary ; instrumentation ; Humans ; Tibial Fractures ; surgery

OBJECTIVE:To establish a method for simultaneous determination of α-pinene,β-pinene and linalool in volatile oil of Hedychium flavum. METHODS:The volatile oil was extracted from H. flavum according to steam distillation stated in Chinese Pharmacopoeia(2015 edition volume Ⅳ). GC method was adopted to determine the content. The determination was performed on HP-5 capillary chromatographic column(30 m×0.032 mm×0.25 μm)with hydrogen flame ion detector(FID),nitrogen gas as carrier gas,with injector temperature of 200 ℃,and detector temperature of 250 ℃,column flow rate of 0.8 mL/min, samples size of 1 μL and split ratio of 40:1 by programmed temperature. RESULTS:The linear range of α-pinene,β-pinene and linalool were 0.090 5-2.413 3 mg/mL(r=0.999 9),0.098 3-2.620 0 mg/mL(r=0.999 9),0.169 1-4.510 0 mg/mL(r=0.999 8), respectively. RSDs of precision,stability(12 h),reproducibility tests were no more than 2.0%(n=6). The average recoveries were 99.84%(RSD=0.49%,n=6),100.24%(RSD=1.38%,n=6),99.41%(RSD=1.67%,n=6),respectively.The contents of α-pinene,β-pinene and linalool ranged 0.214 4-1.325 0,0.766 2-3.172 1,0.357 4-1.518 7 mg/g in volatile oil from 23 batches of H. flavum produced in Guizhou province. CONCLUSIONS:The method established in this experiment is rapid,simple and accurate.It can be used for the content determination of α-pinene,β-pinene and linalool in volatile oil from H.flavum.

Objective:To evaluate the safety and effectiveness of capsule endoscopy for the diagnosis of intestinal diseases in children.Methods:Clinical data of 113 pediatric patients who received capsule endoscopy in Xi'an Children's Hospital from October 2018 to September 2020 were retrospectively analyzed. The completion rate, passage time of stomach and small intestine, lesion detection rate, adverse reactions and complications of capsule endoscopy were analyzed.Results:Among 113 pediatric patients, 78 (69.03%) were male and 35 (30.97%) were female. The age was (99.8±44.7) months (9-195 months), and 31 (27.43%) were under 7 years old. The minimum weight was 9 kg and the minimum height was 70 cm. Eighty-seven pediatric patients (76.99%) swallowed capsules orally (the oral group) with the minimum age of 4 years and 3 months. Capsules were implanted in 26 pediatric patients (23.01%) under gastroscopy (the gastroscopic group), with the maximum age of 9 years and 2 months. Unexplained abdominal pain (47.79%) and unexplained gastrointestinal bleeding (31.89%) were common in the pediatric patients. The completion rate of capsule endoscopy was 97.35% (110/113), and the detection rate of lesions in small intestine was 31.81% (35/110). The passage time of small intestine in the gastroscopic group was significantly longer than that of the oral group (461.04±129.27 min VS 288.23±107.84 min, t=5.646, P<0.01). There was no significant difference in the passage time of stomach or small intestine among different genders, different ages or different endoscopic examination results ( P>0.05). The positive results of capsule were not correlated with the method of ingestion ( P=0.401, OR=2.562, 95% CI:0.284-23.077), gender ( P=0.154, OR=2.352, 95% CI:0.726-7.616), age ( P=0.949, OR=1.007, 95% CI:0.816-1.242), examination reason ( P=0.246) or small intestine passage time ( P=0.219, OR=1.003, 95% CI:0.998-1.008). No complications such as capsule retention occurred in any pediatric patient. Conclusion:Capsule endoscopy in children is noninvasive, rapid and simple, which can improve the diagnostic rate of small intestinal diseases in children, and can be further promoted in pediatric patients.