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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Advances in Medical Education and Professionalism
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Introduction: Problem-based learning (PBL) as a learning style has gained a special position amongst different levels of education systems, and many different approaches, such as tutor education, proper scenario presentation, etc., are used to increase its efficiency. However, the role of homogeneous groups to facilitate team working has never been studied. The purpose of this study is to examine the effect of selective group allocation in PBL efficiency. Methods: In this semi-experimental double-blinded study, 40 students of medicine during their externship in the radiology department were divided into two equivalent groups based on their grade average points. The same topics and the same instructors were chosen for both groups. In the control group, the students were randomly divided into four subgroups each with five members. The subgroups in the study group, on the other hand, were homogenized based on their grade average points. Results: The students’ rate of learning of the theoretical topics and their performance in reporting and interpreting the stereotypes in radiology were measured at the beginning and at the end of the study in both groups by two questionnaires with Alpha Krunback of 0.87 and 0.85. All students were male with the mean age of 23.7 years ± 1.19. Age, grade point average of the students in the last semester and the mean of their pre and post-test scores in both groups showed a normal pattern of distribution (p>0.05). The learning and performance scores in each group at the beginning and at the end of the course showed a statistically significant difference with a p value of 0.011 and 0.03, respectively. Conclusion: Homogenizing the PBL groups with allocation of more competent student in each group plays a complementary tutor role and boosts the level of learning by enhancing group dynamicity.Keyworsds:Homogenization, Problem-based learning, Competent students
- انتشار مقاله: 10-06-1392
- نویسندگان: JAVAD KOJURI,BABAK SHEKARCHI,MOHSEN MOTSHAKER ARANI,POUYA FARHADI,MITRA AMINI,MOHAMMAD REZA DEHGHANI
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Radiation Protection,Curcumin,Gamma rays,Seleno-L-methionine selenoxide,Micronuclei
- چکیده:
- چکیده انگلیسی: Background: The search for potent radioprotective agents for the amelioration of radiation side effect is an important aim in radiobiology. The present study aimed to evaluate the effects of curcumin and seleno-L-methionine against radiation-induced micronucleus formation in rat bone marrow.Methods: In total, 40 male rats were divided into 8 groups (n=5 each), including control, curcumin or seleno-L-methionine treated alone or in combination, 2 Gy irradiation, irradiation of treated groups with curcumin or seleno-L-methionine or their combination. Curcumin was administrated orally and seleno-L-methionine was injected intraperitoneally 24 hours before irradiation. The frequency of micronucleated normochromatic erythrocytes (MnNCEs) and micronucleated polychromatic erythrocytes (MnPCEs) was scored in 5,000 polychromatic erythrocytes (PCEs) and the cell proliferation ratio [(PCE/(PCE+NCE); NCE=normochromatic erythrocytes] was calculated for each treatment group. Data were analyzed by the SPSS software version 16.0 and P
- انتشار مقاله: 12-12-1395
- نویسندگان: Hamed Bagheri,Saeed Rezapour,Masoud Najafi,Elahe Motevaseli,Babak Shekarchi,Mohsen Cheki,Hossein Mozdarani
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Meningioma,magnetic resonance imaging,Adhesion
- چکیده:
- چکیده انگلیسی: Background: This study aims to investigate the ability of BSMI, to preoperative evaluation of tumor adhesion to
adjacent brain tissue in patients with meningioma and comparing this method to the width of edema around tumor, using
surgery findings as the reference standard. Methods: Thirty patients with meningioma brain tumor who underwent
surgery at Loghman hospital were selected for the study between November 2016 and January 2018. The level of
edema according to the classification of Ide et al., (u1995) was compared with the surgical findings with blinded results,
and neurosurgeons made a qualitative assessment of tumor adhesion at the time of resection. The ability of BSMI and
level of edema to predict the surgical assessment of adhesion was tested using the Fisher Exact Test. Results: BSMI
method was conducted on patients with meningioma brain tumor, which judged 22 (73.3%) patients as adhesion (+)
and 8 (26.66%) patients as adhesion (-). In this case, there was a significant relationship between BSMI judgment and
surgical findings (p-value<0.0001). The sensitivity, specificity, precision and accuracy was high, at 91.30%, 85.71%,
95.45% and 90%, respectively. Using T2-Weighted SPACE sequence, of the 30 patients, 13 (43.3%) were judged as
adhesion (+) and 17 (56.7%) as adhesion (-) from edema, whereas surgical findings evaluated 23 (76.7%) as adhesion
(+) and 7 (23.3%) as adhesion (-).The sensitivity was moderate but the specificity was high, at 52.17% and 85.71%,
respectively. Other criteria such as precision and accuracy were 62.31% and 60%, respectively. Conclusions: BSMI
evaluated adhesion of the tumor to the adjacent brain tissue with high-accuracy prior to surgery. This method was more
effective than Edema method in evaluating adhesion between meningioma and the brain.- انتشار مقاله: 04-01-1397
- نویسندگان: Sonia Rezaei,Fariborz Faeghi,Mohammad Samadian,Babak Shekarchi
- مشاهده