Objective To establish a hemorrhagic retinal detachment (HRD) model for the study of the damage and treatment of HRD. Methods Fourteen rabbits (28 eyes) were divided into the HRD (12 eyes) and control (16 eyes) group randomly. Autologous anticoagulated blood (0.2 ml) was transvitreally injected into the rabbits′ subretinal space with a special glass micropipette in HRD group (12 eyes); while 0.2 ml saline with or without heparin sodium (2.5 U/ml) was respectively injected into subretinal space respectively of the rabbits in heparin saline control group (6 eyes) and saline control group (3 eyes); furthermore, another 2 control groups, i.e.,pseudo injection group (3 eyes, single retinal puncturing without subretinal injection) and normal group (4 eyes of 2 normal rabbits) were also set. The conditions of the occurrence and representation of the retinal detachment (RD) were observed and analysed by means of ophthalmoscopy, optical coherence tomography (OCT) and ultrasound A and (or) B scan examinations in the subsequent 28 days after the operation. Results After the operation, HRD occurred in all eyes of the rabbits in HRD group. The area of HRD extended from 10 to 12 disc diameter(DD). The obvious elevation of RD maintained to 14 days, and the residual subretinal hemorrhage was still observed till 28 days. The obvious RD of the rabbits in heparin saline and saline control group was only kept for no more than 12 hours. The retinal puncture hole in pseudo injection group disappeared 2 days after the operation, and there was no change in retina of rabbits in normal control group. Conclusion It is convenient, practical and effective to establish a HRD model by means of transvitreal subretinal injection of autologous anticoagulated blood.

【Objective】To optimize the process conditions for active compounds of Flos Datura by microwave-assisted extraction.【Methods】Uniform design was used to observe the effects of microwave power,microwave radiation time,solvent volume,soaking time and extracting time on the extraction of dry extract,total alkaloids,scopolamine of Flos Datura.The contents of total alkaloids and scopolamine of Flos Datura were determined by acid stain colorimetry and HPLC,and the obtaining rate of dry extract was measured by weight method.【Results】 The optimal process conditions for Flos Datura were as follows: soaking the medicinal material for 2 hours with 10 times of 75% alcohol,with continuous radiation for 25 min at the power of 730 W,at 65℃.【Conclusion】Microwave-assisted extraction is superior to soaking extraction method in increasing productivity and economizing the solvent.

Objective To figure out the optimal parameters of a volumetric modulated arc therapy ( VMAT) plan for cervical and upper esophageal cancer by quality evaluation of VMAT plans with different parameters, and to provide a reference for the design of clinical VMAT treatment plan. Methods Ten patients with cervical esophageal cancer and ten patients with upper esophageal cancer were enrolled as subjects. The Nucletron Oncentra 4. 3 treatment planning system was used to generate plans for Elekta Synergy VMAT accelerator. Six VMAT plans were made with variation in the gantry angle ( 2°, 3°, and 4°), the maximum delivery time (80 s, 110 s, and 150 s), and the collimator angle (0° and 45°). The doses to the planning target volume and organs at risk were analyzed by paired t test. Results For cervical and upper esophageal cancer, the quality of VMAT plans with a collimator angle of 45° was better than those with a collimator angle of 0°(P=0. 003?0. 007). For cervical esophageal cancer, there was no significant difference in quality between VMAT plans with a maximum delivery time of 110 s or 150 s and those with a maximum delivery time of 80 s ( P>0. 05 );for upper esophageal cancer, there was also no significant difference in quality between VMAT plans with three different maximum delivery times ( P>0. 05 ) . For cervical esophageal cancer, the VMAT plans with a gantry angle of 3° had a better quality than those with a gantry angle of 2° or 4°(P=0. 010?0. 048). For upper esophageal cancer, the VMAT plans with a gantry angle of 3° had a better quality than those with a gantry angle of 4° ( P=0. 010?0. 048) . Compared with those with a gantry angle of 2° , the VMAT plans with a gantry angle of 3° had a slightly better dose distribution in the target volume ( P=0. 046 ) , but a slightly higher dose to lung tissue ( V25 and V30 , P=0. 007 and 0. 026) . Conclusions The optimal initial parameters of a VMAT plan for cervical and upper esophageal cancer are a collimator angle of 45°, a maximum delivery time of 80 s, and a gantry angle of 3°.

Objective To compare the results of three dose verification solutions of esophageal carcinoma IMRT plans. Methods Seven esophageal carcinoma cases were planned with Pinnacle 8.0 h.The MATRIXX and Delta4 were chosen as the two-dimensional dosimetry and three-dimensional dosimetry.IMRT plans and Delta4 phantom plans were also recalculated by Monte Carlo. Gamma values were evaluated for MATRIXX and Delta4 with 3 mm/3% gamma criteria. For the comparison of Pinnacle, Delta4 and Monte gamma maps, the dose distribution in central plane, dose profiles and dose-volume histograms were used to evaluate the agreement. Results The gamma maps comparison show that with 3 mm/3% gamma criteria an over 98% pass ratio was obtained by MATRIXX measurement. A 94. 4% gamma pass ratio whicl.contains 4 fields gamma pass ratio lower than 90%, was obtained by Delta4 measurement. A 97.6% and 99. 8% gamma pass ratio was obtained between the Delta4 measurement and Monte Carlo simulation with 2 mm/2% and 3 mm/3% gamma criteria. The dose distribution in central plane and dose profiles from Pinnacle calculation were almost in agreement with both the Monte Carlo simulation and Delta4 measurement. The DVH plot have slightly differences between Pinnacle and Delta4 measurement as well as Pinnacle and Monte Carlo simulation, but have excellent agreement between Delta4 measurement and Monte Carlo simulation. Conclusions It was shown that all the three methods can be used very efficiently to verify esophageal carcinoma IMRT delivery, Delta4 and Monte Carlo simulation no data missed. The primary advantage of Delta4 is the fact it can measure true 3D dosimetry while Monte Carlo can simulate in patients CT images but not in phantom.

Objective:To establish an analytical method for measuring the concentration of glucose in saliva by ion chromatography.Methods:The proteins in saliva were removed by thermal denaturation method, CarboPac PA20 (3×30 mm) was used as a protective column and CarboPac PA20 (3×150 mm) was used as an analytical column for ion chromatography analysis. Gradient elution was carried out with A: ultra-pure water, B: 250 mmol/L NaOH solution and C: 500 mmol/L NaAc solution. Pulsed ampere detector was used for detection.Results:This method had a good linear relationship in the range of 0.04 to 0.12 mg/L, with a linear relation coefficient of 0.9967. The detection limit of glucose was 2 μg/L, the mean value of the relative standard deviation (RSD) of the repeatability measurement was 0.75%, and the average spike recovery was 103.07%.Conclusion:This method is simple, sensitive, accurate and stable, and can be used for the determination of glucose concentration in saliva.

Objective To evaluate and compare the efficacy of holmium laser enucleation of the prostate(HoLEP) and plasmakineticenucleation of the prostate(PKEP) for treating benign prostatic hyperplasia (BPH).Methods A total of 86 cases of BPH were selected from the Shandong Energy Zibo Mining Group Co.Ltd Central Hospital from January 2013 to June 2014.The patients received either HoLEP (40 cases) or PKEP(46 cases) treatment.Clinical data including postvoid residual volume (PVR),international prostate symptom score(IPSS),quality-of-life score(QOL score),maximum urinary flow rate (MFR) were evaluated before and 3 months after operation.Blood loss in operation,operation time,weight of resected prostate tissue,bladder irrigation time,catheterization time and length of hospital stay were also collected from the perioperative period.Results Three months after surgery,PVR,IPSS,QOL and MFR were all significantly improved in both HoLEP and PKEP groups compared with the data before operation (P =0.000),while there was no significant difference between the two groups(P＞0.05).Patients from the HoLEP group showed markedly lower values of bone loss in operation than that of PKEP group((69.5±23.6) ml vs.(87.5±38.0) ml,P=0.011).There were no significant differences in terms of other indexes (P＞ 0.05).Conclusion HoLEP and PKEP have similar efficiency in treating BPH,while HoLEP is suggested superior in regard of bone loss.

Objective To investegate the effect of phosphorylated-P38 MAPK(mitogen-activated protein kinase) on the expression of caspase-3 in the substania nigra (SN) of MPTP-induced mouse model of(PD). Methods Mice were randomly divided into MPTP model group, which were treated with MPTP and inhibitor group. Once a day for 5 days; control group was treated with saline and DMSO as much as the model group received per day for 5 days. The behavioral were observed, immunohistochemistry and Western blot for TH, caspase-3 and phosphorylation of P38 MAPK were used to observe the change of positive cell number and the expression level in the SN of midbrain. Results Compared with the mice in control group, the model group showed typical symtoms of PD with decreased numbers of TH-positive neurons and the protein level of TH in SN of the midbrain by about 60% and 65% respec-tively(P<0.01) , the numbers of caspase-3 and phosphorylation of P38 MAPK immunoreactive cells and their protein level in the SN of the midbrain increased markedly (P<0.01). After giving SB203580, the above changes were reduced obviously (P <0. 01). Conclusion In the mouse model of subacute Parkinson's disease induced by MPTP, phosphorylated-P38 MAPK regulated caspase-3 in the SN of midbrain, the specific P38 MAPK inhibitor SB203580 is neurologically oprotective to the mouse model.

Objective To evaluate the variance and the concordance between the tumor length measured by CT scans and that measured by surgical specimens in esophageal carcinoma. Methods Fiftytwo surgical specimens of the esophageal carcinoma were made into pathological giant section.The shrinkage ratio of tumor was calculated by comparing the length of the specimen fixed by formalin for 24 h and that measured during the operation.One hundred and thirty-seven patients with esophageal carcinoma underwent spiral CT scan before the surgery,and the length of the gross tumor volume was obtained.After the tumor length of the fixed specimen had been measured,the real tumor length in situ was calculated using the shrinkage ratio.Then the variance and the concordance between the tumor length in CT scans and that in situ were compared.Results The mean shrinkage ratio was 90%±10%.The mean tumor length in CT scans was longer than that in situ(5.8 am±2.4 cm vs 4.1 cm±1.8 cm,P=9.68,P=0.000).The concordance of the length measured by the two methods was 40.9%(56/137). Conclusions A certain variance existed between the tumor length in CT images and that computed from surgical specimen in esophageal carcinoma.The results of esophagography and endoscopy should also be referred to delineate the gross tumor volume of esophageal carcinoma.

ObjectiveTo evaluate correlation factors of cervical lymph nodes metastasis in thoracic esophageal carcinoma.MethodsLocal-regional metastasis of lymph node for 126 cases with esophageal squamous cell cancer after surgery from 2004 to 2009 were reviewed.Risk factors of cervical lymph nodes metastasis were examined by multiple Logistic regression analysis.ResultsIn 126 cases,supraclavicular lymph node metastasis rate was 43.7％ (55/126).By logistic regression,none of the primary site,T stage,N stage,histological grade,lymph node metastasis rate,lymph node metastasis degree and number of lymph nodes metastatic field was not the high risk of cervical lymph nodes metastasis.In addition,multivariate analysis found that lymph node metastasis in mediastinum region 1 was high risk factor for lymph node metastasis of region 1 ( x2 =12.14,9.27,P =0.000,0.002),lymph node metastasis in region Ⅲ and region 2 were high risk factors for lymph node metastasis of region Ⅱa ( x2 =14.56,8.27,8.02,3.93,P =0.000,0.004,0.005,0.047 ).ConclusionMediastinal para-recurrent nerve lymph node metastasis is a significant predictor for cervical lymph nodes metastasis.

The brain pharmacokinetics of hyperoside and 1 , 5-dicaffeoylquinic acid and the effects of acanthopanax senticosus leaves on neurotransmitters in cerebral ischemic rat brain were investigated. In the study, acute incompleteness cerebral ischemia model was developed by ligating the bilateral common carotid arteries of rats. The differences of brain pharmacokinetics of hyperoside and 1,5-dicaffeoylquinic acid between control and cerebral ischemic rats were determined by online microdialysis coupled with MS/MS method. At the same time, the contents of glutamic acid (Glu), aspartic acid (Asp), γ-aminobutyric acid (GABA), serotonin (5-HT) , dopamine ( DA) , and acetylcholine( Ach) in rat hippocampus among different groups were determined simultaneously in MRM mode. ACE 5 C18-AR column was used for separation. Results showed that the online analytical method had excellent linearity (R2>0. 99). The accuracy and precision could meet the analysis requirement. Besides, the hyperoside and 1,5-dicaffeoylquinic acid penetrated the blood-brain barrier successfully and metabolized quickly, but the absorption reduced and elimination became faster in cerebral ischemic rats; the contents of Glu, Asp, GABA and DA in brain issue of cerebral ischemic rats decreased significantly ( p<0 . 01 ) and the level of Ach increased remarkably ( p<0 . 05 ) after a preventive medication with the extract of acanthopanax senticosus leaves for one week.