Objective To determine the contents of Poloxamer in contact lens care solution by spectrophotometric method,and investigate the effect of the other lubrication composition on the measurement. Methods Five brands of contact lens care solution with hydroxypropyl methyl cellulose(HPMC)were obtained.The interference of HPMC in contact lens care solution was removed by heating and rapid filtering,and the contents of Poloxamer was determined by KI-I_2 spectrophotometry. Results For the pre-treated contact lens care solution,the tested wavelength was 500 nm and the development time was 120 min.Favourable linearity was observed when Poloxamer ranged between 0.001 mg/mL and 0.020 mg/mL,with standard curve of Y=0.050 91X+0.017 15 and r~2=0.998 2.Precision(n=6)test revealed that RSD was 1.331 4%,and RSD of daytime repeatability experiment was 2.971 3%.The recovery rates of 80%,100%and 120% samples ranged between 90%to 105%. Conclusion KI-I_2 spectrophotometry is a convenient,stable and reliable method,and may sere as a mass control method for nonionic surfactant Poloxamer content in contact lens care solution.

Solitary fibrous tumor (SFT) in bladder is extremely rare. In this study, we reported one case of bladder SFT and reviewed the only ten cases of the disease that had been reported so far. The patient suffered from residual urine sensation and urethral pain. Cystoscopy revealed a 7-cm protruding mass at the dome of the bladder, and bladder mucosa biopsy showed normal differentiation of the bladder mucosa with a small amount of inflammatory cells. Radical resection of the tumor was performed in this patient. Pathological examination found uniform, haphazardly arranged spindle cells, the majority of which were CD34-positive and Vimentin-positive and proved that the mass was a solitary fibrous tumor. Within a period of 9 months of follow-up, no reoccurrence was found.

Objective To investigate the relationship between myeloid differentiation (MD-2) gene polymorphisms and necrotizing enterocolitis (NEC) in neonates.Methods A gene-sequencing method was used to re-sequence the exons and the promoter functional polymorphism region (rs11465996) of MD-2 gene of 42 NEC neonates admitted in neonatal intensive care unit of Women and Children's Medical Center,Guangzhou Medical University from June 1,2011 to May 31,2012.These functional polymorphism loci were compared with 83 non NEC cases.The Chi square test was used for statistical analysis.Results No polymorphism was detected in the exons of MD-2 gene in any of the 42 cases of NEC.The C-1625G polymorphism [rs11465996 (C＞G)] was identified in both the NEC and control groups,and there were two genotypes,C/C and C/G.The frequency ofC/G genotype in the NEC group (38.1％,16/42) did not differ significantly compared to that in the control group (30.1％,25/83) (x2=0.805,P=0.370).However,the frequency of C/G genotype in severe NEC cases (operation group) (55.0％,11/20) was significantly higher than that in the control group (x2=4.388,P=0.036).Among the NEC group,the frequency of C/G genotype in operation cases and term infants was higher than that of the non-operation cases and preterm infants,although the differences were not significant (x2=3.343,P=0.067; xx2=0.913,P=0.339).Conclusions The polymorphisms in the exons of MD-2 gene are not associated with the development of NEC.The rs 1 1465996 polymorphism (G allele) in the promoter region may be related to the severity of NEC.

Objective To investigate the accuracy and promptness of thromboelastography (TEG) to assess the blood transfusion requirements after abdominal operation in comparison with conventional assessments including vital signs (MAP,heart rate,breathing rate),urine output,hemoglobin and hematocrit.Methods From June to December in 2010,there were 57 patients were suspected bleeding in abdominal cavity after operation in SICU.Recorded data including vital signs (MAP,heart rate,breathing rate,oxygen saturation),urine volume per hour,the coagulation tests (Fib,PT,aPTT,INR),TEG parameters (R,K,Angle,MA,CI),the results of blood routine (Hb,Hct,Ph) and whether bleeding or not,blood product requirements within 24 h.Results Vital signs (MAP,heart rate,breathing rate,oxygen saturation),urine output per hour and the coagulation tests (Fib,PT,INR) showed no significant correlations (P ＞ 0.05) with blood transfusion requirements,but aPTT (R =0.513,P =0.000) and MA (R =0.578,P =0.000) correlated with the blood transfusion requirement.Patients with reduced MA needed more blood transfusion requirements.Patients were divided into active bleeding group and insidious bleeding group.MA had significant difference between two groups (P =0.025),but aPTT had not.Conclusions Thrombelastography is a more accurate indicator of blood transfusion requirements,especially in active bleeding patients.

Objective To investigate the effects of intravenous fluid restriction on complications after biliary surgery.Methods The clinical data of 168 patients who received biliary surgery at the Nanjing General Hospital of Nanjing Military Command from October 2006 to March 2008 were prospectively analyzed.All patients were randomly divided into test group(85 patients received fluid restriction treatment)and control group(83 patients received conventional treatment)by the sealed envelope method.The difference in the fluid volume between the 2groups was observed.Differences in systemic complication rate,local complication rate,general complication rate,time to bowl movement,length of hospital stay and mortality between the 2 groups were compared.All data were analyzed using the chi-square test,t test,Fisher exact test,Results The median total volumes of fluid in test group and control group were 1450 ml and 2420 ml,respectively,with significant difference between the 2 groups (t=-5.067,P<0.05).The median volumes of erystalloid solution in the test group was 850 ml,which was significantly lower than 1500 ml of the control group(t=-15.190,P<0.05).The postoperative systemic complication rate and general complication rate of the test group were 9%(8/85)and 19%(16/85),which were lower than 22%(18/83)and 30%(25/83)of the control group.There was a significant difference in the postoperative systemic complication rate between the test group and the control group(x2=4.837,P<0.05).The time to bowl movement and length of hospital stay were 2 days and 9 days in the restriction fluid group,which were significantly shorter than4 days and 12 days in the control group(t=-8.102,-2.003,P<0.05).The mortalities of test group and control group were 2%(2/85)and 4%(3/83),respectively,with no significant difference between the 2 groups(P>0.05).Conclusion Fluid restriction reduces the complication rate,shortens the length of hospital stay and accelerates recovery after biliary operation.

Objective To understand the molecular aberration at whole genomic level,CGH (comparative genomic hybridization) was used to investigate genetic abnormality in lung cancer.Methods Comparative genomic hybridization was performed in 17 cases to detect the global genomic aberration in cancer tissue cells.Results All of 17 cases detected by CGH showed chromosomal aberrations.The average numbers of chromosomal gains and losses in each case were 7.0 and 4.8 in NSCLC and 8.4 and 9.6 in SCLC,respectively.The frequency of gains and losses on chromosome had no significant differences between NSCLC and SCLC.The frequencies of gains on chromosomal arms 3q24 -28 and 11q13(58.3％ and 58.3％ ) in NSCLC were significantly higher than that in SCLC(0％ and 0％ ) ( P ＜0.05 and ＜0.05,respectively).Conclusions The cytogenetic aberration generally existed in lung cancer cells.Several regions ( more than one) of chromosomal aberration were involved in the carcinogenesis of NSCLC and SCLC.The regions and frequencies of chromosomal aberration in NSCLC were somewhat different from that in SCLC,which might result in the different biological behavior of the two types of lung cancer.The chromosomal aberration might be served as a marker to differentiate the two types of lung cancer.

ObjectiveTo study the efficacy of transcatheter arterial chemoembolization (TACE) after liver resection for hepatocellular carcinoma (HCC) with tumor thrombus in the main trunk and/or first branch of portal vein,and to clarify prognostic factors affecting survival.Methods From 2005 to 2009,there were 358 consecutive patients with HCC who underwent surgical resection in our Department.In 55 patients (15 ％),portal vein tumor thrombus (PVTT) was found intraoperatively or postoperatively during histopathological examinations to involve the first portal branch,main portal trunk,or contralateral portal branch.In this retrospective study,these 55 patients were divided into two groups:Group A,29 patients received postoperative TACE,and Group B,26 patients who did not receive TACE.The clinical data and survivals were compared between the two groups.Prognostic factors were indentified using univariate analysis,followed by multivariate regression analysis using the Cox proportional hazards model.ResultsThere were no significant differences in the demographic clinical data between Group A and Group B.The overall 1-,2- and 3-year survivals for the 55 patients were 63.3 ％,51.4 ％ and 43.5 ％,respectively.The accumulative 1-,2- and 3-year survivals for group A were 71.4 ％,60.1 ％ and 50.1 ％,respectively.The corresponding figures for group B were 56.7％,21.7％ and 10.4％,respectively.Multiple tumors,intrahepatic metastases,hepatic vein thrombus,and invasive type of tumor thrombus were found to be risk factors for short-term survival on univariate analysis,while the latter 3 factors were further found to be significant prognostic factors in the Cox proportional hazards model.Postoperative TACE was shown to be a significant factor in both univariate and multivariate analyses.ConclusionLiver resection was beneficial for some patients with portal vein tumor thrombus.Postoperative TACE further improved the prognosis and prolonged survivals in these patients.

Objective To observe ultramicro pathologic change of rabbit brain central damaged tissue and peripheral tissue after LOT, to evaluate the changed structure of blood brain barrier (BBB) of peripheral tissue in acute stage. Method Seventy Newzealand rabbits were randomly screened from Zhejiang University Animal Experiment Center. By stereotaxic technique, semiconductor surgica laser fibers were inserted into right frontal lobes and heat treated to randomly build LITT Group A (2 W, 600 s, n = 20) and LITT Group B (15 W, 100 s, n = 20) brain damaged models successfully. Other 15 nomal rabbits were randomly distributed as mannitol perfusion group and fake operation group. The ultramicro structures in central thermodamaged tissue were observed with transmission electro microscope after LITT 3 h,6 h,12 h,24 h. In peripheral tissue, ultramicro morphologic changes of brain vessels and BBB were evaluated. S100B protein in serum and BBB indexe were measured at different stages post LITT. Experimental data were treated as one-factor analysis of variance and q test. Results The brain damage center connected the tip of laser fiber and turn into thermodamage tissue. The main structure changes were cytoclasis, damnification of cell membrum, swelling of cell organelle such as mitochondrion, endoplasmic reticulurn,disappearance of mitochondrion and sparseness of cytoplasm in local tissure. Heat energy conducted to damage peripheral tissue, some cells occured apoptosis in different stage. In acute stage after LITT, contracted capillary vessel, oncreted red cell, swell endothelium cell, broken base membrum, wide around clearance and destroyed aperture structure were identified. The levels of serum S100B and BBB indexe dramatically rised. The opening time of BBB in peripheral tissue was longer than mannital perfusion group. However at 24 h post LITT, they began to recover in Group A. The difference of serum S100B and BBB indexe between Group A and Group B has statistical significance ( P =0.0087). Conclusions With semiconductor laser heat treatment and stereotaxic techniqe, definite cells cytoclasis, cell membrance structures and chondriosome damage could be performed obviously in rabbit brain thermotherapy point. Apoptosis could be found in peripheral tissue, BBB could be opened in an acute stage. The opening time course of BBB was shortened in those LITT cases with small power. It shew us a new method to perform a safe and exact damage zone of brain for functional neurosurgery.

OBJECTIVEA method for determined oxygen permeability (Dk) of finished soft contact lens.

METHODSOxygen permeability(Dk) of 10 group finished soft contact lens was determined by polarographic method, and the values were linearly calibrated using the measured and established Dk values of the specified reference materials.

RESULTSOnly one Dk value fell outside of the requirement of GB 11417.3-2012 tolerance for Dk (± 20%).

CONCLUSIONIt is great practicability when determined the oxygen permeability (Dk) of finished soft contact lens by polarographic method which were linearly calibrated using the measured and established Dk values of the specified equal thickness reference materials without the measured lens customized 4 different thickness.

A total of 26 patients comprising 14 with delayed fracture healing and 12 with bone nonunion were treated via subperiosteum and fractured spatial injection of osteoblasts. Bone marrow was extracted from posterior superior lilac spine to obtain osteoblasts following in vitro induction, culture and amplification. Subsequently, 5-8 mL osteoblasts at a density of 1 ×105 cells/mL was sterilely injected into subperiosteum and fractured interspace in injured region using X-ray positioning. At 4, 6, 10 and 14 weeks after injection, callus formation was checked using X-ray. All cases followed up for 3-12 months, with the means of 5.3 months. Callus was formed after 4 weeks, fractured ends were wrapped up by callus after 6 weeks, and fracture line was unclear after 10 weeks and disappeared after 14 weeks. Bone fracture was healed, with the mean healing time of 12.1 weeks, suggesting that percutaneous subperiosteum injection of osteoblasts is an effective method to treat delayed fracture healing and bone nonunion.