Taking Liaoning Medical University as an example , the paper introduces the Problem -based learning ( PBL) teaching mode into the teaching of the medical information retrieval course for graduate students .It introduces the overall design and arrangement of PBL teaching and the implementation process of teaching .By questionnaire surveys , analysis of individual retrieval reports and assess-ment of PBL teaching effects , it points out existing problems and proposes several measures for optimizing PBL teaching .

Objective To develop a method for nou-invasive risk model that can be used in health management system and primary healthcare centers. Methods Based on systematic phenotype measurement and modified superviser-based machine learning, an applicable and low-cost method for non-invasive disease risk prediction model was developed. Invasive risk assessment model for Chinese isehemic cardiovascular diseases (ICVD) was used as a supervised standard reference to provide evidence based non-invasive model with skin resistance on 24 acupeints. Results A total of 4606 cases from a physical examination system were collected to develop the model. For those reasonable evaluation indeies, the coincidence of non-invasive with invasive risk prediction model was > 90% on average level. Conclusions This method could be used to develop non-invasive risk assessment model for the common diseases.

Technology and technique of coronary artery stent have been developed to a certain degree, restenosis rate of metal stent reduces to 15%, but coronary artery stent is still difficult for long-term effect of interventional therapy on coronary atherosclerotic heart disease. Drug-eluting stent is newly discovered during recent years, while it is prospect for preventing restenosis postoperatively. Although clinical efficacy of drug-eluting stent is encouraged, indication is still simple. In addition, some events related to drug-eluting stent remain poorly unknown. This study was designed to compare security between drug-eluting stent and metal bared stent, analyze major factors correlated with security of drug-eluting stent, and investigate the development of drug-eluting stent.

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 investigate the inhibitory effect of lead acetate on transient receptor potential A1(TRPA1)channel. METHODS TRPA1-mediated calcium influx in mice dorsal root ganglion(DRG) neurons and HEK293 cells expressing nouse TRP1 (mTRPA1) and human TRPA1 (hTRPA1) was recorded by intracellular calcium imaging. TRPA1-mediated currents were detected by two-electrode voltage clamp. RESULTS Lead acetate 3.0 and 10.0μmol·L-1 inhibited external calcium influx in DRG neurons by(36.7 ± 4.1)% and(79.4 ± 3.1)%(n=5),respectively. The inhibitory effect of lead acetate on hTRPA1-mediated current was concentration-dependent. Lead acetate 0.3, 1.0, 3.0, 10.0 and 30.0μmol · L-1 inhibited the amplitudes of currents by(1.0 ± 0.7)%,(11.6 ± 0.8)%,(57.7 ± 3.2)%,(93.6 ± 2.6)%and(91.2±2.0)%(n≥4),respectively,with the IC50 2.4μmol·L-1. CONCLUSION TRPA1 channel may be an endogenous target of lead. Lead acetate inhibits TRPA1 channel at a very low concentration.

Congenital cataract is responsible for approximately one tenth of childhood blindness worldwide.Generally,cataract includes three inheriting types:autosomal dominant,autosomal recessive or X-linked.The identified genes so far for hereditary cataracts in both human and animal model mainly include encoding structural lens protein,gap junction protein,membrane protein and regulatory protein involved in lens development.Crystallins are the major structural protein of the lens.Mutation in the crystallin genes can result in lens opacity.Understanding of the mechanism of hereditary cataract may also be helpful for us to understand the involvement of environmental and nutritional factors in the process of lens opacification.The function of the crystallins proteins,the mutations in crystallin genes and associated phenotypes are summarized.

Objective To investigate the characteristic changes of auditory brainstem response (ABR) of nor‐mal hearing infants .Methods A total of 212 cases (327 ears) normal hearing infants were enrolled for ABR test . According to age ,167 ears was in 1~3 months age group ,105 ears was in 3~6 months age group ,55 ears was in 6~12 months age group .Each group consisted of ABR date were statistically analyzed .Results For 75 dB nHL click sound stimulus ,the peak latency and interpeak latency of Ⅲ ,Ⅴ ,Ⅰ — Ⅲ ,Ⅲ — Ⅴ ,Ⅰ — Ⅴwaves of normal hearing infants progressively shortened as they grew older except the wave Ⅰ .The ABR thresholds were in significantly difference among the groups .The amplitude ratio of wave V/I increased with the grewing age .Each group of data showed statistically significant differences .When the stimulus intensity reached at thresholds ,the occurrence rate of wave I ,III and V were different as they grew older .Conclusion Infants with auditory nervous system was in con‐stant development and improvement ,all parts of the auditory pathway of neural development was not balanced .

Objective To investigate the expressions of amyloid precursor protein and β-microtubule protein,and to study their clinical significance in patients with cerebral infarction.Methods 108 cases of acute cere-bral infarction as the observation group and 60 normal adults as the control group were collected in the study.The expressions of amyloid precursor protein and β-microtubule protein in different clinical characters were detected by western blot.Results The results of observation group [APP:(168.78 ±13.64)μg/L,β-tubulin:(124.64 ± 27.08)μg/L]were significantly higher than those in control group (t =22.81,P <0.01;t =21.08,P <0.01).Their expressions were correlated with CT scores and prognosis.Conclusion The higher expressions of amyloid precursor protein and β-microtubule protein may promote the occurrence and development in patients with cerebral infarction. The joint detection should be helpful to predict the prognosis and direct the treatment.