Objective To explore the risk factors for peptic ulcer bleeding in elderly patients.Methods The 414 patients with upper gastrointestinal ulcer bleeding in Xuanwu Hospital from January 2001 to January 2006 were enrolled.The patients were divided into elderly group (≥ 60years,n= 183 ) and non-elderly group ( ＜ 60 years,n= 231 ).The coexisting diseases and hemorrhage causes were compared and analyzed.Results The detection rate of coexisting diseases was significantly higher in elderly group than in non-elderly group (68.9% vs.10.0% ).The hemorrhage causes included the taking of drugs for cardiovascular and cerebrovascular diseases or osteoarthropathy in elderly group.And the fatigue,stress and dietary upset were the main causes in non-elderly group.Helicobacter pylori infection rate was 35.0% in the elderly and 58.0% in young patients.Conclusions It is very important to promote rational use of anticoagulant drugs and analgesic agents in elderly patients for managing peptic ulcer complication.

The interaction of biomaterials and tissues has been the focus of biomaterial science for many years and formed the foundation of the subject of biocompatibility. The research about biomaterials provides better basis for biomedical devices by the understanding of biocompatibility phenomena. In this paper, over 50 years of experience with such devices is analysed and it is shown that, in the vast majority of circumstances, the sole requirement for biocompatibility in a medical device intended for long-term contact with the tissues of the human body is that no harm should be brought to those tissues. Only a few bio-active biomaterials has been applied successfully in clinics. This artical gives a review on the application of biomaterials in tissue engineering,sophisticated cells, drug and gene delivery systems and in biotechnology. Interactions between biomaterials and tissue components is discussed as well.

Objective To investigate the protective effects of ischemic preconditioning on myocardial ischemia/reperfusion injury in diabetic rats.Methods Twenty-eight healthy male rats were injected streptozotocin at dose of 45 mg/kg by tail and be fed with normal diet for 4 weeks,then rats were randomly divided into iscbemia/reperfusion (I/R) group and ischemic preconditioning (IP) group.ST segment of electrocardiograph changes and arrhythmias of all rats were recorded before ischemia and 0,15,30 minuets after ischemia and 0.5,2 h after reperfusion.TTC staining was performed to determine myocardial infarct size.TUNEL assay was used to assesse cardiomyocyte apoptosis.The expression of antiapoptotic gene (Bcl-2) and proapoptotic (Bax) was determined by immunohistochemistry.Results Compared with I/R group,ST segment elevation of patients in IP group decrease from (0.675 ±0.150) mV to (0.489 ±0.161) mV at 30 min after ischemia(P ＜0.05).Meanwhile the onset of ventricular premature contraction(VPC) in IP group was (18.21 ± 5.36) min,later than that of control group ((6.47 ± 4.28) min,t =5.241,P =0.000).The duration of VPC was (6.07 ± 4.33) min,shorter than that of I/R group ((16.71 ± 5.48) min,t =4.924,P ＜ 0.01)).The incidence of ventricular tachycardia (VT) and ventricular fibrillation (VF) of lP group remarkably decreased compared with I/R group (VT:57.14％ (8/14) vs.14.29％ (2/14),x2 =5.600,P =0.018 ; VF:50.00％ (7/ 14) vs.14.29％ (2/14),x2 =4.094,P=0.043).The myocardial infarct size in IP group was (12.50 ± 9.45) ％,smaller than that of I/R group ((37.50 ± 11.40)％,t =3.211,P =0.006).Cardiomyocyte apoptotic index (AI) was attenuated in IP group than that of I/R group((24.31 ± 3.12)％ vs.(19.01 ± 4.32)％,t =3.227,P =0.006),which was correlate with increased the ratio of Bcl-2/Bax((0.103 ±0.045) vs.(0.221 ±0.101),t =2.670,P =0.015).Conclusion IP treatment for diabetic rats shows a protect effect on myocardial I/R injury through attenuating myocardial apoptosis,and increasing the ratio of Bcl-2/Bax.

OBJECTIVE: To establish a method of microwave digestion-graphite furnace atomic absorption spectrophotometry for the determination of chromium in soft capsule shells. METHODS: Microwave digestion was adopted to digest the soft capsule shells. Graphite furnace temperature control program was optimized, zeeman effect was used in the background correction, the slit width was 0.5 nm, and the content of chromium was determined under the wavelength of 357.9 nm. RESULTS: The calibration curve was linear in the range of 0-50 mg·L-1 (r=0.9996). The detection limit was 0.06 mg·kg-1, and the average recoveries were 90%-110%. CONCLUSION: This method is simple, accurate, and suitable for the determination of chromium in soft capsule shells. Copyright 2012 by the Chinese Pharmaceutical Association.

Genetic Heterogeneity ; Humans ; Magnetic Resonance Imaging ; methods ; Neoplasms ; diagnosis ; genetics ; pathology ; Positron-Emission Tomography ; methods ; Tomography, X-Ray Computed ; methods

One of the major responsibilities for medical students is to save lives and to popularize emergency medical treatment knowledge for the masses of society.Based on research analysis,systemic training of cardiopulmonary resuscitation program including lectures,simulation education and social practice were performed for medical students.After practice activities,these students could proficiently apply the basic knowledge and skills of cardiopulmonary resuscitation in practical work and spread what they have learned to the public.Furthermore the program could improve students' abilities in social practice and team spirit and it is of great social significance.

In this study,the rDNA ITS sequence of isolate of Lactarius deliciosus(L.)Gray was sequenced.Molecular identification was accomplished using phylogenetic tree analysis of 22 Lactarius nrDNA-ITS nucleotide sequence including the 2 new and 20 GenBank sequence.

Objective: To investigate the therapeutic effects of norcantharidin poloxamer 407(NCTD P407) slow released preparation on advanced primary liver cancer by local intratumoral injection. Methods: Fifty six advanced primary liver cancer patients with maximum diameter from 6 to 12 cm were randomly divided into test and control groups. Patients in test group (29 case) were treated by NCTD 407 intratumoral injection under ultrasonic and patients in control group (27 case) by PEI (percutaneous intratumoral absolute ethanol injection). Clinical therapeutic effects were observed respectively and compared. Results: Twelve months survival rates of patients in 2 groups were significantly different, being 31.0% in test group and 22.2% in control group ( P 0.05) in 2 groups. No evident poisonous and side effects were found in either test or control group. Conclusion: NTCD P407 administration exhibits therapeutic effects in relatively big advanced liver cancer because of the high concentration and prolonged action in the tumor foci, its comprehensive therapeutic effect is better than that of absolute ethanol administration. [

Objective To investigate the dynamic changes of plasma myoglobin(Mb),troponinⅠ(TnⅠ) and brain natriuretic peptide(BNP)levels in the course of acute myocardial infrction(AMI)and to detect the best marker for early diagnosis and outcome prediction.Methods Plasma Mb,TnⅠand BNP levels were measured in 49 patients with AMI both before and after thrombolysis therapy and 32 controls.Results Plasma levels of all the three markers were significantly higher in the AMI patients than those in the controls(P

Objective To analyze the factors related to glare occurred after the phakic intraocular lens (P-IOL) implantation,and to raise the standard for the P-IOL selection.Design Retrospective case series.Participants 104 patients with high myopia underwent P-IOL implantation in Beijing Tongren Hospital.Methods In 104 cases,22 cases (22 eyes) were implanted angle supported Phakic6 designed accord with corneal symmetry,54 cases (54 eyes) were implanted iris fixed Verisyse,and 28 cases (28 eyes) were implanted posterior chamber PRL.Selection of the diameter of P-IOL optics depended on P-IOL diopters.The pupil diameter,the P-IOL optic center position,the pupil and corneal center position were measured with anterior segment optical coherence tomography (OCT).The contrast sensitivity (CS) under different condition (day,day and glare,night,night and glare) and in different space frequency (1.5,3,6, 12,18c/d)were examined with Optec6500 system.Main Outcome Measures Glare incidence,CS,and the influence of pupil diameter and P-IOL location to glare.Results None of the 104 P-IOL eyes occurred glare in day time.59 eyes (56.73%) complained of glare in dime condition.The glare incidence was 63.18% (14/22) in Phakic6 eyes,55.56% (30/54) in Verisyse eyes,and 53.27% (15/28) in PRL eyes (P=0.691).CS of all surgical eyes were improved in day time with or without glare luminous environment (P=0.000).And the CS of halo-complaining eyes was lower than of no halo eyes in night time with or without glare luminous environment (P=0.000).Glare oc- curred more frequently in eyes with the pupil diameter larger than P-IOL diameter in clime condition after surgery (10 in Phakic6 eyes, 20 in Verisyse eyes,12 in PRL eyes,all P