The organophosphorus insecticides including a large group of insecticides were widely used in the world in the agriculture and household. Over 80% of the pesticides used in China are organophosphorus pesticides. Workers and the general population may be exposed to insecticides mixtures through water,air and the residue of food. After entering into human body,the insecticide mixtures can cause a combined toxicity. In this paper,the effects and toxicity mechanisms of combined exposures on health were expounded.

Objective To investigate the clinical efficacy and safety of laparoscopic appendectomy for acute appendicitis.Methods Nighty-two cases of acute appendicitis were included in this study,randomly divided into observation group (n =46) and control group (n =46) according to the random number table method.The observation group was treated with laparoscopic appendectomy,and control group with the traditional open appendectomy treatment.We compared the two groups of cases in postoperative conditions and the level of WBC changes and 1d and 3d after operation.Results The operation time of the observation group was shorter than that of the control group (t=4.049,P＜0.05);there was no significant difference in lymph nodes (t=0.570,P＞0.05);the amount of bleeding was less than that of the control group (t=20.748,P＜0.05).The get-out-of-bed activity time in the observation group was faster than the control group (t=9.221,P＜0.05);eating time was faster than the control group (t=8.794,P＜0.05);the anus recovery exhaust time was faster than the control group (t=17.423,P＜0.05);hospital stay was shorter than the control group (t=13.479,P＜0.05);the complication rate was lower than that of the control group (t=13.883,P＜0.05).The levels of 1d and 3d WBC were lower in the observation group than that in the preoperative group (t=7.277,26.911,P＜0.05);the levels of 1d and 3d WBC in the observation group were lower than those in the control group at the same time (t=3.6189,17.827,P＜0.05);the 3d WBC level of the observation group was lower than that of 1d (t=20.732,P＜0.05).Conclusion Laparoscopic appendectomy is a safe and effective treatment for patients with acute appendicitis,and it is worthy of further clinical research.

The WAN Mi-zhai's health preserving thought includes guayu,shendong,fashi and queji .The key of guayu is to control appetition to conserving essence.The aim of shendong is to keep the good psychology with peaceable mind.The view-point of fashi is to keep up with nature for harmonizing yin and yang.The denotation of queji is to prevent disease and regulate essence, qi and spirit.

Objective To observe the influence of Dunhuang Nourishing Cream on the contents of SOD, GSH-PX and MDA in skin of aged rats. Methods Female SD rats of SPF level were divided into 6 groups:high, moderate and low dose groups of Dunhuang Nourishing Cream, model contrasting group, positive contrasting group and blank contrasting group. After removed the hair on the back, the drug groups were applied with Dunhuang Nourishing Cream, the model group was applied with the matrix of Dunhuang Nourishing Cream and the positive group was applied with vitamin E. After 30 days, the contents of SOD, GSH-PX and MDA in the skin were tested with the method of biochemistry analysis. Results Compared with the model group, the contents of SOD, GSH-PX and MDA in the high, moderate and low dose groups had significant difference (P

Objective To observe the expression of mitochondrial encoding cytochrome oxidase subunitⅠ(COXⅠ) and subunitⅡ(COXⅡ) in type Ⅱalveolar epithelial cell(AEC Ⅱ) of rats exposed to hyperoxia and explore the role of COXⅠand COXⅡ in hyperoxia-induced lung injury.Methods AECⅡ were gained by primary culture from 19-days fetal rats lung.After purified,AECⅡ were randomly assigned to hyperoxia group and air group.Hyperoxia group was flushed the flake with 950 mL/L O2 and 50 mL/L CO2 at 3 L/min for 10 min,then sealed.Both groups were in CO2 culture chamber(37 ℃,50 mL/L CO2).After 6,12 and 24 hours of exposure,AECⅡ were harvested and extracted for total RNA.COXⅠand COXⅡ mRNA were detected by reverse transcription polymerase chain reaction(RT-PCR).The results were analyzed by SPSS 12.0 softwore.Results Compared with air group,COXⅠmRNA expression in hyperoxia group increased significantly at 6 hours(t=3.832 P=0.019) and 12 hours(t=10.431 P=0),respectively,then decreased to the equivalent level in 24 hours(t=0.360 P=0.731).Compared with air group,COXⅡmRNA expression in hyperoxia group increased significantly at 6 hours(t=2.795 P=0.035),then decreased to the equivalent level at 12 hours(t=0.892 P=0.40) and 24 hours(t=2.018 P=0.071).Conclusions Exposure of hyperoxia up-regulate the expressions of COXⅠmRNA and COXⅡmRNA in AECⅡ,which may be a protective mechanism of hyperoxia-induced lung injury.

We regenerate and inaugurate the humanity quality cultivation modes of medical students.Based on the principles of scientificity,feasibility,openness,flexibility,multiplication and so on,we construct an effective training system for medical students to further improve their humanity quality.

Objective To explore the curative effect of combined use of minimally invasive percutaneous nephrolithotomy (MPCNL) and extracorporeal shockwave lithotripsy (ESWL) for the treatment of solitary renal staghorn calculi in patients with renal insufficiency. Methods Eight cases of solitary renal staghorn calculi associated with renal insufficiency were treated by a combination of MPCNL and ESWL. Results Stones were completely cleared away in 5 cases, while residual stones were found in 3 cases. No blood transfusion was required and no severe surgery-related complications were encountered. After surgery variable degrees of improvement in renal functions was observed. The serum creatinine (Cr) decreased from 289?166 ?mol/L pre-operation to 155?33 ?mol/L post-operation (t=4.69, P=0.004), and the blood urea nitrogen (BUN) decreased from 15.1?7.9 mmol/L to 8.3?1.9 mmol/L (t=4.00, P=0.005). The emission computed tomography (ECT) examinations showed the glomerular filtration rate (GFR) was elevated from 48.8?12.4 ml/s before operation to 63.0?8.4 ml/s after operation (t=4.68, P=0.003). Post-renal obstruction disappeared after operation. Follow-up for 0.5~4.5 years (mean, 2.8 years) in the 8 cases revealed no obvious changes in renal functions. Conclusions Combination of MPCNL and ESWL for solitary renal staghorn calculi associated with renal insufficiency is safe and effective.

Objective To investigate the treatment of Navicular bone fracture with Herbert screw.Methods Twenty-three patients with Navicular bone fracture were collected.They were all conducted with CT scan diagnosis and type,the small incision and targeting wire was used in operation.The Herbert screw was used to fix with pressure,plaster was also used to fix.After operation,the activity training was executed gradually.Results We conducted follow-up of 6-18 months in 23 patients,with an average of 12 months.All patients got bone-healing,the healing time ranges from 7 to 10 weeks,with an average of 9 weeks.There was one case of screw penetrating cortical bone,and one case of mild deformity healing,among the other 23 cases there were no complications including infection,nonunion,necrosis,osteoarthritis'etc.Conclusion The treatment of Navicular bone fracture with Herbert screw fixation can get firm fixation,function training and healing early,and it's worth of clinical promotion.

For the purpose of determining the time of death,the life history (the growth and development) and the sum of effective temperature of Lucilia Sericata were studied under the ordinary temperature. On the bases of the growth and development of the fly ,we have established three linear regression equations between the sum of effective temperature and the length of larvae or weigth pupa of Lucilia Sericata (K 1=2 0880+0 8014X 1、K 2=54 0917-2 8814X 2、K 3=133 2180-2 6312X 3).These linear regression equations provide a reliable,scientific method for estimating the time of death in forensic medicine practice.

Objective To investigate the correlative factors that affect the outcome of pregnancy complicated with SLE and try to provide the best chance for conception, pregnant monitoring, prevent the deterioration of SLE and improve the perinatal quality.Methods Retrospect analysis of 79 cases of pregnancy complicated with SLE. Results The birth weight in the group of pregnancy with SLE was lower than that in the normal group. The outcomes (weight and gestational weeks) of pregnancy in multipara, and nephrolupus groups were poorer than those in primigravida, and in non nephrolupus. The outcomes of pregnancy with SLE in active stage at the beginning of conception were poorer than those in stationary or remission stage. Conclusions The results show that first of all, the activity of SLE should be controlled and patients should get conception under the guide of the obstetricians and physicians, multi pregnancy also should be avoided. Prednisone is one of the safe drugs for pregnant women to control the activation of SLE and to prevent from deterioration. Intensive monitors should be offered to pregnant women complicated with SLE to acquire a better pregnancy outcome.