OBJECTIVE: To put forward proposals for improving essential medicines system in China.METHODS: The problems existing in the essential medicine system in China and the successful experience of some other countries were analyzed.RESULTS & CONCLUSION: Considering the current medical economy level and the capacity on research & development(R&D) of drugs,China should draw inspiration from WHO and other developed countries about their successful experiences on essential drugs to improve the screening methods for essential medicines list,assign legal status for essential medicines and build up system of production,procurement and distribution of essential medicines according to the basic national situation of our country and finally establish the essential medicine system suitable to our country's condition.

Objective To study the imaging manifestations of spontaneous orbital hemorrhage and to evaluate the diagnostic values of different imaging techniques.Methods The manifestations of ultrasound,CT and MRI in 30 patients with spontaneous orbital hemorrhage confirmed by surgery or puncture were retrospectively analyzed.Then the imaging data were compared with pathological or clinical results.Results Eighteen of 30 patients were surgically confirmed, including 6 cases of simple blood cysts, 10 cases of venous angioma with hematocysts ( 7 cases in the intraconal space and 3 cases within the extraocular muscle),2 cases of varicosity with hernatocysts ( 1 case in the intraconat space and another case within the extraocular muscle).Twelve patients were proved by puncture.The sonngraphie features of the spontaneous orbital hemorrhage in all 30 cases were inhomogeneons and slightly compressible cysts without blood flow in them.The CT manifestation of the lesions was lack of specificity and showed isodensity or slight hyperdensity,however, the CT value of the lesions had the tendency of decrease over time.The CT values were 82.0 to 89.0 HU in 4 cases with the courses of 1-3 days.And when the hemorrhage courses were 4-20 days,21-60 days, the CT values were 69.0 to 82.0 HU (20 cases) and 30.0 to 37.0 HU (6 cases),respectively.On MRI, the lesions showed typical signal characteristics and evolution of hematomas.For 1-3 days (4 cases), the lesions showed isointensity on T1WI and hypointensity on T2WI; for 4-10 days (10 cases), the lesions appeared hyperintensity in the central zone on T1WI and still showed hypointensity on T2WI; for 11-20 days( 10 cases), the lesions was homogeneous or inhomogeneous hyperintensity on T1WI and homogeneous hyperintensity on T2WI; and for 21-60 days (6 eases), the lesions showed heterogeneous intensity on both T1 WI and T2WI.The coincidence rates with clinical diagnoses were 96.7% (29/30) for ultrasound, 26.7% (8/30)for CT and 100% (30/30) for MRI, but they all showed limited ability in distinguishing simple from secondary orbital hemorrhage.Conclusion MRI is superior to ultrasound and CT in diagnosing spontaneous orbital hemorrhage and evaluating the secondary changes.

Objective To approach the alleviating effect of medicative diet for food therapy on hepatic function of patients with gastric cancer and adjuvant chemotherapy after operation and supply references for effective treatment and nursing. Methods We divided 123 patients with gastric cancer after operation into the test group (65 cases) and the control group (58 cases).The control group adopted routine treatment project while the test group received medieative diet for food therapy based on routine treatment project. The changes in hepatic functions were compared between the two groups. Results The changes in hepatic functions of the test group were better than those of the control group (P<0.01 ). Conclusion Medicative diet for food therapy could significantly restore the seriously damaged hepatic function after chemotherapy.

ObjectiveTo investigate the feasibility of using the ratio of (Cho + Cr)/Cit derived by MRS to predict the differentiation grades of prostatic cancer and Gleason grading.Methods Five postoperative prostate specimens were spitted and layered according to the region of interest of MRS inspections.The correlation between the CC/C values of each region of interest in each layer and the Gleason scores of the corresponding pathological sections was analyzed.The optimum diagnostic cutoff value was determined by conducting the hypothesis test of the area below the ROC curve of the well and moderately differentiated groups and poorly differentiated ones on the basis of CC/C values with a Spearman test.Results A total of 90 regions with valid pathologic diagnosis were obtained,70 cancer-affected and 20 cancer-free.In MRS,a CC/C value above 0.86 was used as a criterion for defining a cancer-affected region As a result,65 cancer-affected regions and 25 cancer-free regions were identified,among which pathologic diagnosis confirmed 59 and 14,respectively.Spearman′s rank correlation analysis revealed that the CC/C values of the prostatic carcinoma had significant positive correlation with Gleason scores ( r =0.746,P =0.000).For the well and moderately differentiated groups,the hypothesis test about the cutoff value,which was obtained by calculating the area below the ROC curve,was of no statistical significance.For the poorly differentiated groups,the optimum cutoff value was defined as 0.948,and the sensitivity and specificity were 81.4％ and 75.0％,respectively.It was also observed that the Gleason scores of the poorly differentiated endemic regions had positive correlation with the CC/C values ( r =0.605,P =0.000 ),suggesting that CC/C value was associated with the differentiation grade of the poorly differentiated prostatic cancer.When CC/C value was above 0.948,the poorly differentiated prostatic cancer was typically detected and Gleason score was often above 7.Conclusions CC/C values has positive correlation with Gleason scores.MRS may be used to predict the differentiation of prostate cancer.

Objective To investigate the MRI features of male urogenital diaphragm.Methods A total of 4 pelvic specimens of healthy male cadaver and 15 healthy male volunteers underwent pelvic MRI examination.All MRI scan images were analyzed to approach the urogenital diaphragm structure both in corpse and the MRI images.Results The normal urogenital diaphragm of cadavem connected to ramus inferior ossis pubis and ischiadic ramus.There were three layers inside the urogenital diaphragm,including superior fascia of urogenital diaphragm,inferior fascia of urogenital diaphragm and deep transverse muscle of perineum.MRI imaging showed the coronal was the best location to exhibit the urogenital diaphragm,and all of the structure appeared like sandwich.In the images of the diaphragm of the volunteers also exhibited like sandwich,and the three layers are moderate signal in MRI.Ten volunteers were given the fat-depresstion and high resolution scan of T2WI in small ROI,and the structure could be seen much clearly.Fat-depresstion and high resolution scan of T2WI in small ROI was the best sequence to exhibit the urogenital diaphragm.Coronal location of the structure appeared like sandwich.Conclusion MRI is a good way to show urogenital diaphragm,and high resolution scan of T2WI in small ROI can show the structure much clearer.

OBJECTIVE:To initiate punitive compensation system in drug field to make up the insufficiency in the legislation of legal liability of drug injury events,regulate unlawful act of pharmaceutical enterprises and enhance supervision efficiency in drug field. METHODS: The definition and function,etc. of the punitive compensation system were studied by reviewing the pertinent legal clauses both at home and abroad,furthermore,the necessity of initiating the punitive compensation system in China was analyzed and the application conditions of the punitive compensation system was put forward. RESULTS & CONCLUSIONS: It is urgent to initiate the punitive compensation system in drug field and establish a punitive system with Chinese characteristics. It is advisable to initiate the related contents in Pharmaceutical Administration Law of the People’s Republic of China and define the application conditions of the punitive compensation system as well as the way to establish the amount of compensation,etc.

Objective To investigate the structural and ultrastructural changes of the skin induced by micro-plasma radio-frequency technology,and to preliminarily discuss this novel technology mechanism.Methods Thirty guinea pigs were enrolled and randomly divided into three groups.They were radiated by different dose parameters 40 W,10 kJ; 60 W,10 kJ and 80 W,10 kJ.Every guinea pig's back was divided into two parts which was removed after immediately,one week and one month,and dermatopathology and transmission electron microscopy (TEM) were performed.Results The different dose setting could make different skin change of immediately effect.When dose setting was 40 W,10 kJ,skin showed that epidermal cells were integrity and the superficial layer of dermis collagen tissue was light homogenization.When dose setting was 60 W,10 kJ,epidermal tissue showed focal emergence of fractional shape change and obvious homogenization.When dose setting was 80 W,10 kJ,epidermal showed complete vaporization loss or degeneration necrosis,and dermal superficial and middle layer of collagen tissue showed a large area of homogenization.Skin superficial collagen tissue's structure gradually showed dense and arranged in an orderly manner after one week and markedly thickened and arranged in compact manner after one month.TEM showed that epidermal cells were relatively complete,intercellular structure was normal,but the dermal collagen lost originally normal structure and cell structure disappeared and obviously showed massive apoptosis.A small amount of apoptosis was showed but collagen structure gradually restored after one month.Conclusions The novel micro-plasma radio-frequency has obvious dose effect to skin,and its main target tissues are dermal collagen tissue.It can stimulate skin collagen hyperplasia in certain degree.

Objective To investigate the expression of Fascin in early-stage NSCLC, evaluate the relevance between Fascin expression level and prognosis.Methods The immunohistochemistry method was used to assess the expression of Fas-cin in 111 lung cancer FFPE tissues with stage Ⅰ and Ⅱ NSCLC.The relationship between Fascin expression and the clinico-pathological characteristics was analyzed.The prognostic significance of Fascin expression was evaluated with Kaplan-Meier sur-vival analysis.Results In the early-stage of NSCLC, the positive rate of Fascin expression was 64.8%, no expression in the paracarcinoma tissue.The positive rate of squamous cell carcinoma was 78.7% and was significantly higher than that in adeno-carcinoma 48.0%(P<0.01).Whether in squamous cell carcinoma or adenocarcinoma group, the expression of Fascin was correlated significantly with lymph node metastasis tumor stages and DFS(P<0.05).And the positive expression of Fascin was an independent risk factor of poor prognosis for patient with NSCLC .Conclusion Fascin is expected to be a biomarker for the prognosis of patients with early-stage NSCLC.

Objective To prepare 5-aminolevulinic acid (ALA) and hematoporphyrin monomethyl ether (HMME) hydrogel suppositories and to evaluate their photosensitizer transfer efficiencies in rectal tumor tissue.Methods The BALB/c mice implanted SW837 rectal cancer cells subcutaneously were randomly divided into four groups:intrarectal suppository administration group,cutaneous administration group,intratumoral injection group and intravenous injection group.Fluorescence spectrophotometry was used to measure the concentration of protoporphyrin Ⅸ (PpⅨ) and HMME in rectal wall,skin and tumor tissue.The distribution of photosensitizer was determined by a fluorescence spectroscopy system.Results The concentration of PpⅨ in the ALA suppository administration group was 9.76 times (1 h) and 5.80 times (3 h) higher than that in the cutaneous administration group,and the differences were statistically significant (all P＜0.05).The maximal penetration depth of ALA in tumor tissue was about 3-6 mm at 2 h after the cutaneous administration.After the HMME suppository administration,the concentration of HMME in the rectal wall was very low.The maximal penetration depth of HMME in tumor tissue was less than 2 mm after the cutaneous administration.Conclusions ALA is more likely to penetrate mucosal barrier compared to skin tissue.The hydrogel suppository based rectal administration is expected to be a new administration method for the rectal cancer photodynamic therapy using ALA.

Objective To investigate the anti-inflammatory and analgesic effects of combined application of glucosamine(GS)and chondroitin sulfate(CS).Methods The acute and chronic anti-inflammatory effects of combined application of GS and CS were observed respectively through carrageen-induced paw edema and cotton-induced inguinal granuloma of rats.The analgesic effect of combined application of GS and CS was investigated by the mouse pain model induced by 0.6% acetic acid Results As compared with the control group,the degree of paw edema and the weight of granuloma in combined application of GS and CS group were significantly reduced(P<0.05 and P<0.01,respectively);and the writhing number of mice decreased significantly(P<0.05).Conclusion Combined application of glucosamine and chondroitin sulfate demonstrates obviously anti-inflammatory and analgesic effects.