OBJECTIVE:To establish the HPLC method for the content determination of cetirizine hydrochloride gel.METHODS:The assaying was conducted on a SinoChrom ODS-BP column with 0.02 mol?L-1 sodium dihydrogen phosphate-acetonitrile(60∶40)as mobile phase at a flow rate of 1.0 mL?min-1.The column temperature was 25 ℃;the detection wavelength was 231 nm and the sample size was 10 ?L.RESULTS:The linear concentration range of cetirizine hydrochloride gel was 0.100 4～4.016 0 ?g(r=0.999 9)with average recovery rate at 97.85%(RSD=1.57%).CONCLUSI-ON:The method is simple,accurate and reproducible,and it can be used for the quality control of cetirizine hydrochloride gel.

Diphtheria is an ancient disease.Since the implementation of enhanced program of immunization by WHO in 1978,the global incidence of diphtheria decreased sharply.There were no diphtheria cases reported in recent years in China,but there were still diphtheria cases and outbreak reported in surrounding countries.It is necessary to strengthen the laboratory diagnosis of diphtheria in China to prevent the recurrence and for early detection of emergent and imported diphtheria cases.Here in this review,the laboratory diagnosis of diphtheria and its progress were summarized.

AIM: To study the chemical constituents of Elaeagnus pungens. METHODS: Chemical constituents were separated through chromatographic methods and their structures were elucidated by spectral analysis. RESULTS: Five compounds were isolated from the petroleum ether extract of leaves of Elaeagnus pungens Thunb.Their structures were elucidated as hentriantane(1),lupeol(2),?-sitosterol(3),oleanolic acid(4) and 3,5-dihydroxy4,7-dimethoxy flavone(5). CONCLUSION: Compounds hentriantane(1) and 3,5-dihydroxy-4,7-dimethoxyflavone(5) were isolated from this plant for the first time.

Objective To preparemicroRNA-34 a loaded liposome and evaluate the targeting efficiency for lung cancer stem cells and effect on the treatment of lung cancer. Method The liposomes were prepared by thin film hydration method. The particle size,Zeta potential and entrapment efficiency were evaluated. Stability of liposome in serum was evaluated. The efficiency of cellular uptake on lung cancer stem cells in vitro was evaluated. The anti-proliferation efficiency of miLPs-34 a was evaluated by MTT assay. Tumor spheroids were used to evaluate anti-tumor ability of miLPs-34 a. Lung cancer stem cells were used to build orthotopictumor model, which were used to evaluate the effect of anti-cancer. Results The particle diameter of the miLPs-34 a was (136.55±11.4) nm with the Zeta potential of (21.45±4.55) mV. The entrapment efficiency of microRNA-34 awas 94.6%.the results demonstrated that the liposomes could keep stable in 50%serum for 24 h. miLPs-34 a uptaken by lung cancer stem cells were 3.1 times higher than that of microRNA-34 a(P<0.01). The MTT assay confirmed strong inhibitory effect of miLPs-34 a than microRNA-34 a(P<0.01). the inhibition of tumor spheroid confirmed strong inhibitory effect of miLPs-34 a than microRNA-34 a(P<0.01). The anti-tumor of miLPs-34 a was much more effectively than microRNA-34 a(P<0.01).Conclusion the microRNA-34 a loaded liposome could target to lung cancer stem cells and inhibit the proliferation of lung cancer stem cell. MiLPs-34 a, as a new nanometer drug, has a special application value for the therapy of lung cancer stem cell.

BACKGROUND:Traditional treatment of tibia and fibula fractures complicated with skin soft tissue defect is mainly external fixation, wound debridement and dressing plus skin graft or skin flap transplantation after the infection is control ed and granulation grow. This method is disadvantageous due to high cost, great pain, long hospitalization stay, infection and necrosis, even the possibility of amputation.
OBJECTIVE:To explore the clinical efficacy of vacuum sealing drainage (VSD) and external fixator in the treatment of tibia and fibula open fractmes complicated with skin defects.
METHODS:A total of 38 patients with severe open fractures of tibia and fibula complicated with skin defects were selected from Benxi Central Hospital between January 2009 and September 2013. The size of skin defects was more than 5 cm2. After external fixation, the patients underwent complete debridement and dressing, fol owed by VSD treatment for 5-7 days. After granulation tissue grew and the wound became fresh, the patients received intermedite thickness skin graft. And 15 cases treated without VSD were retrospectively selected, serving as control group. The infection control rate and wound healing time in the two groups were compared.
RESULTS AND CONCLUSION:After 5-7 days of VSD treatment, VSD dressings were removed, wound infection was control ed, local wound granulation tissue was fresh. Both the wound and fractures were healed wel , no osteomyelitis or amputation occurred. Among the involved 38 patients, 23 cases were cured, 12 cases were effective, and three cases were ineffective. The total effective rate showed significant differences compared with the control group (92%vs. 53%;P<0.05). VSD can completely remove the wound secretions and necrotic tissue, improve local microcirculation, eliminate the infection, VSD plus external fixator and skin grating is a simple and effective method in treatment of tibia and fibula open fractures with soft tissue defects.

BACKGROUND:An animal model of myocardial infarction is of great significance for the study of the pathogenesis, pathophysiology and evaluation of treatment methods of human coronary artery disease. Many researchers aim to improve survival rate and the success rate of model induction.
OBJECTIVE:To improve the method of making a rat model of myocardial infarction.
METHODS:One hundred Wistar rats were divided into model group (n=80) and sham-operated group (n=20). The rats were intraperitoneal y anesthetized with 3%sodium pentobarbital. Tracheostomy was operated. An automatic breathing apparatus was utilized for assisted breathing. A left anterior thoracotomy was performed at the fourth intercostal space. The left anterior descending coronary artery was ligated. Sham-operated rats underwent similar surgery but without coronary artery ligation. The thoracic cavity was closed layer by layer. The breathing apparatus was removed and tracheal intubation was also removed. To prevent suffocation, the trachea and the neck incision were not closed.
RESULTS AND CONCLUSION:Heart morphology and hematoxylin-eosin staining demonstrated that the success rate of establishing myocardial infarction model was 98.6%. The survival rate of model group at 3 weeks after surgery was 88.75%. Total y nine rats died, including seven dead rats during operation and within 24 hours after operation, and two dead rats in later stage. The survival rate of the sham-operated group was 100%. We modified the method of establishing a rat model of myocardial infarction and improved the operation success rate and survival rate of rats, such as anesthesia method, longitudinal incision during tracheotomy, without closing the trachea after operation, and the method of opening and closing the chest.

Medical ethics is a set of behavioural principles which regularized medical workers' relationships to patients and society and that between themselves under social ethics and the development of medical science.It is an essential constituent of the social ethical system and plays an important role in medical activity.By studying the current situation of the ethics-oriented education on medical students,the author re-analyzed the current state of medical ethics and proposed some creative and feasible methods on improving the quality of medical ethics of the students.

OBJECTIVE:To improve the rational compatible use of Chinese patent medicines with western medicines. METHODS:A total of 24 000 prescriptions were randomly sampled from July 10th to July 15th in 2006 for an analysis of the compatibility of Chinese patent medicines containing Salvia miltiorrhiza,Radix et Rhizoma Glycyrrhizae,Radix et Rhizoma Rhei with western medicines.RESULTS:Of the total 24 000 prescriptions analyzed,6 830(or 3 213 patients) involved combined use of Chinese patent medicines with western medicines,of which,the irrational combination for Salvia miltiorrhiza-contained,Radix et Rhizoma Glycyrrhizae-contained and Radix et Rhizoma Rhei-contained Chinese medicines with western medicines totalled 128,118 and 16 cases respectively.CONCLUSION:When the Chinese patent medicines being used in combination with western medicines,their physicochemical and pharmacological properties should be taken into fully consideration so as to achieve rational combination.

Beginning with the principle of justice, this article analyzed the reasons of medical disputes due to the lack of the principle of justice from four aspects including patients, social media, medical institutions, and medical staff. Corresponding countermeasures were put forward based on the causes of the disputes: fostering cor-rect consciousness of medical treatment, persisting on objective propaganda and creating a favorable environment, strengthening the construction of medical ethics and increasing health investment, strengthening the professional competency education for medical staff, and setting up medical dispute mediation organizations dominated by the third party.

Objective To study the distribution and antimicrobial susceptibilities of anaerobic bacteria from periodontal pockets of patients with chronic periodontitis, so as to guide the anti-infection therapy. Methods Eighty-four patients with chronic periodontitis were enrolled in this study. The anaerobes were isolated from periodontal pockets of patients with chronic periodontitis. Antimicrobial susceptibility of the anaerobes to seven kinds of antibiotics (like metronidazole, penicillin, cefmetazole, etc.) was tested with the agar dilution technique. Results A total of 305 cultivable anaerobes were isolated from periodontal pockets of 84 patients with chronic periodontitis. All patients were infected by anaerobes. 59.34%of cultivable anaerobes were gram-positive anaerobes, and 40.66%were gram-negative anaerobes. The P.melanin ogenica and P.gingivalis were the most common among the cultivable anaerobes, accounting for 51.19% and 55.95%, followed by P.intermedia (36.90%), P.micros (35.71%), F.mucleatum (33.33%), Capnocytophaga ssp (27.38%), Actinomyces ssp (10.71%), and so on. Most isolated anaerobes were sensitive to seven antibiotics. All isolated anaerobes were susceptible to Chloromycetin and Imipenem. 98.03%of isolated anaerobes were susceptible to Amoxicillin. Approximately 76%to 88%of isolated anaerobes were susceptible to Cefmetazole and Metronidazole. Susceptibility to Clindamycinum and Penicillin were 65.91%and 55.73%. Conclusions There is a close relationship between chronic periodontitis and anaerobes. P.melanin ogenica and P.gingivalis are the most frequently isolated anaerobes from periodontal pockets of patients with chronic periodontitis. Chloromycetin and Imipenem can be used for the treatment of anaerobes infected chronic periodontitis.