AIM:To explore the fingerprint method for quality control of Danhong sterile powder for injection (Radix et Rhizoma salviae mihiorrhizae,Flos carthami).METHODS:The samples were determined by Agilent 1100 DAD-HPLC with SinoChrom ODS-BP column(250 mm×4.6 mm,5 μm),by gradient elution using methanol-0.1% phosphoric acid,as mobile phase 30 ℃ column temperature.flow rate of 1.0 mL/min,detection wavelength was set at 280 nm,and inject volume 20 μL.RESULTS:Its fingerprint exhibited better separation for each peak,revealing amount of finger information,Based on the ten batches of Danhong sterile powder for injection,according to the technical requirements of fingerprint on injection of Chinese traditional medicine.CONCLUSION:Proposed HPLC fingerprint can be used as the important evidences for the quality control of Danhong Injection.

AIM:To explore the fingerprint method for quality control of Danhong sterile powder for injection(Radix et Rhizoma salviae miltiorrhizae,Flos carthami).METHODS:The samples were determined by Agilent 1100 DAD-HPLC with SinoChrom ODS-BP column(250 mm?4.6 mm,5 ?m),by gradient elution using methanol-0.1% phosphoric acid,as mobile phase 30 ℃ column temperature,flow rate of 1.0 mL/min,detection wavelength was set at 280 nm,and inject volume 20 ?L.RESULTS:Its fingerprint exhibited better separation for each peak,revealing amount of finger information,Based on the ten batches of Danhong sterile powder for injection,according to the technical requirements of fingerprint on injection of Chinese traditional medicine.CONCLUSION:Proposed HPLC fingerprint can be used as the important evidences for the quality control of Danhong Injection.

Objective To compare the efficacy of oral rehydration salts(ORS),health education and autonomic nervous activity training with health education and autonomic nervous activity training on children with postural orthostatic tachycardia syndrome (POTS).Methods Fifty-two children with POTS based on head-up test or head-up tilt test were divided into ORS treatment group and conventional treatment group.ORS treatment group included 33 children,and they received ORS and health education and autonomic nervous activity training therapy.Conventional treatment group included 19 children who received health education and autonomic nervous activity training therapy only.Telephone follow-ups were made after the therapy for 1-3 months.The contents of follow-up were the compliance of ORS treatment,the implementation of health education and POTS related symptom frequency.Results 1.The compliance of doctor's advice in ORS treatment group was better than that in the conventional treatment group.2.There was no significant difference in the symptom scores before therapy between ORS treatment group and conventional treatment group [(6 ± 3) scores in ORS treatment group vs (5 ± 3) scores in conventional treatment group,t =0.799,P ＞ 0.05].After 1 to 3 months therapy,the symptom scores were significantly lowered in both groups.The symptom scores in ORS treatment group was lower than those of the conventional treatment group[(2 ± 1) scores in ORS treatment group vs(3 ± 1)scores in conventional treatment,t =-2.189,P ＜ 0.05].3.If the therapy was determined to be effective when the symptom scores decreased by at least 2 scores,the effective rate in ORS treatment group was significantly higher than that of the conventional treatment group(78.8％ in ORS treatment group vs 42.1％ in conventional treatment group,x2 =7.169,P ＜ 0.01).Conclusions The efficacy of ORS,health education and autonomic nervous activity training therapy is better than that of the health education and autonomic nervous activity training therapy only in POTS children.

Objective To study the diagnosis, therapy and prevention of bile duct carcinomas in choledochal cysts. Methods We retrospectively analysed clinico pathologic data, the ways of operation and living time of 11 patients with bile duct carcinomas in choledochal cysts in two hospitals from 1986 to 1997. Results There were complete excision of the choledochal cysts associated with choledochojejunostomy in 4 patients, exploration of bile duct and drainage with T shape tube in 3 patients. And there were also the excision of the wall of bile duct cysts and the tumor and cholangioplasty, choledochocystoduodenostomy, biopsy, pancreaticoduodenectomy and cholangiojejunostomy at the porta hepatis, resection of original rhynchostoma of choledochojejunostomy in one patient, respectively. One patient has lived for 3.6 years after radical resection. Others lived for 13.6 months after operation. Conclusions It is the key of improving and lengthening lives to find this disease in the early stage and to resect radically as early as possible.

Background Keratectasia after laser in situ keratomileusis (LASIK) is one of the serious complications which affect the vision.The measurement of cornea posterior elevation is an important way helping to find this change.Objective The aim of this study was to investigate the change of cornea posterior elevation after LASIK in myopic eyes with astigmatism and affecting factors.Methods A series case-observational study was adopted.One hundred and twenty-seven myopic eyes with astigmatism of 66 patients who received LASIK in 2008 May through 2010 January in Beijing Tongren Hospital were retrospectively analyzed to evaluate the change of cornea posterior elevation following the LASIK.The parameters related to cornea posterior elevation were measured and compared before and 3 months,6 months and 1 year after surgery,respectively,with Oculyzer anterial segment analysis system.Results The height values from posterior cornea highest point,the lowest point and central vertex central elevation zone were (12.20±3.39),(-19.02±7.38) and (1.05 ±3.25) μm respectively before LASIK and were (14.38±3.80),(-18.55±7.11),(2.83±4.81)μm in3 months and (13.99±3.38),(-17.57±6.54),(2.45±4.61) μm in 6 months after LASIK.They were (14.40±3.85),(-17.76±6.00),(2.16±5.00) μm in 1 year after surgery.Significant increases were found in the vertex height and central elevation after LASIK compared with before surgery(highest pointq=6.813,5.594,6.875,all at P＜0.001.central vertex:q=4.488,P=0.002;q =3.530,P=0.013 ;q =2.799,P =0.047).However,no significant difference was seen in various time points after LASIK (P＞0.05).A positive correlation was obtained between the height value of the posterior cornea central vertex with the spherical equivalent (SE),maximum cutting depth or cutting proportion 1 year after LASIK (r =0.295,0.297,0.295,all at P=0.001),and there was a negative correlation between it with residual stroma (r=-0.208,P=0.019).The intraocular pressure (IOP) measured with noncontact tonometry (NCT) was (14.24±3.33) mmHg before LASIK,and those of 3 months,6 months and 1 year were (8.42± 1.90),(8.61 ± 1.64) and (8.76± 1.64)mmHg after LASIK,showing a significant lowing in IOP after LASIK in comparison with before LASIK (q =29.851,28.317,26.337,all at P＜0.001).But no significant change was found in the different time points after LASIK (P＞0.05).There was significant difference in the IOP corrected by Ehlers after LASIK (P＞0.05).The IOP before LASIK had positive correlation with the central elevation of posterior cornea surface 1 year after LASIK(r=0.258,P =0.003).Conclusions The cornea posterior elevation increases slightly early stage after LASIK but retains stable level with lapse of time.The refraction diopter before LASIK is the main factor affecting the posterior corneal shape.To reduce the risk of corneal ectasia,more attention should be paid to the reserving of appropriate corneal residual stroma and smallest degree of eccentricity during the ablation procedure.

OBJECTIVETo evaluate the effect of different root canal irrigants and cements on coronal microleakage and the interaction effects after cementing metal post-cores.

METHODSNinety newly extracted single-rooted mandibular human premolars were endodontically treated. Post spaces were prepared in the root canals, and Co-Cr post-cores were cast routinely. The specimens were randomly divided into six groups (n = 15) via a two-way factorial design method. The irrigant factors (A) included A1: no irrigant (75% alcohol wiping), A2: 3% H2O2 + 0.9% NaCl, and A3: 15% ethylenediamine tetraacetic acid (EDTA) + 5.25% NaClO. The cement factors (B) included B1: zinc polycarboxylate cement, and B2: glass ionomer cement. The specimens received treatments based on the grouping of A1B1, A1B2, A2B1, A2B2, A3B1, and A3B2. All samples were sectioned longitudinally after being immersed in India ink for three weeks. The microleakages were observed using a stereomicroscope. The SPSS 13.0 software package was used for factorial analysis.

RESULTSThe mean microleakage scores and standard deviations were as follows: Group A1BI: (1,192.59 +/- 417.84) microm, Group A1B2: (1,317.38 +/- 527.35) microm, Group A2B1: (1,429.33 +/- 482.68) microm, Group A2B2: (1,026.79 +/- 459.49) microm, Group A3B1: (1,448.29 +/- 561.02) microm, and Group A3B2: (1,922.47 +/- 678.86) microm. The A2B2 group showed minimum microleakage, whereas the A3B2 group showed maximum microleakage. The microleakage degrees among different irrigants presented significant statistical difference (P < 0.05), but the two cements showed no significant difference (P > 0.05). An interactive effect on the microleakage existed between the irrigants and the cements after cementing the metal post-cores (P < 0.05).

CONCLUSIONWhen cementing metal post-cores, the coronal microleakage following 3% H2O2 + 0.9% NaCl irrigation combined with glass ionomer cement can be reduced. The combined application of 15% EDTA + 5.25% NaClO and glass ionomer cement significantly aggravates microleakage.

Cementation ; Dental Cements ; Dental Leakage ; Glass Ionomer Cements ; Humans ; Hydrogen Peroxide ; Metals ; Post and Core Technique ; Resin Cements ; Root Canal Irrigants

Objective To develop an HPLC-MS/MS method for simultaneous determination of xylazine and 2,6-xylidine in body fluid samples.Methods The samples were extracted by HLB SPE,separated by Waters Atlantis dC18 chromatographiccolumn,and then detected in the MRM scan ion mode under positive ionization condition.Results The recoveryrates of this method were between 70.5％ and 79.8％ with the range of RSD rfrom8.2％ to 10.5％.The limits of detection ofxylazine and 2,6-xylidine in blood and urine samples were 0.4 and 0.3 ng/mL,and the limits of quantitation were 1.2 and 1.0 ng/mL,respectively.Conclusion This method is of high sensitivity,good specificity and good reproducibility,and thus could besuitable for accurate quantification of xylazine in blood and urine samples.

The module of surgical instruments modularization based on the theory research are applied to the medical rescue of earthquake relief effort by the application of methods on practical demonstration,which solves the defects and inadequacies of the traditional surgical instruments box group field and validates the feasibility of practical application in the combination of modular design of surgical instruments,these can provide practical basis for new modules of field surgical instruments.

By the application of modularization combination principle,a new type of field medical point operation instrument set is designed.It not only innovates the organization mode of the traditional field operation instrument case,meets the requirement of intensivization,portability and standardization but also improves the support efficiency of medical service.

The important role of nursing work environment has received much attention in the management of nursing workforce and the quality of health care services. This paper analyzed current studies on nursing work environment, and suggested that the government and hospital administrators pay more attention to the development of nursing workforce, adequate clinical nurse staffing levels and promoting healthy work environment for nurses.