[ effect of flow divider on restenosis in stented human coronary artery with modelling]

Shear stress is known to play a central role in restenosis formation and is sensitive to stent geometry. To investigate the effect of flow divider on restenosis in a stented human coronary artery. The present paper describes a qualitative study in which a computational fluid dynamics model to analyze the blood flow in a stented human coronary artery was used. Stents were assumed with real structure and modeled using the commercial software package [Gambit, V2.0]. A flow divider is a flexible cylindrical body with different diameters and lengths which is centered within the stent lumen by means of self-expandable stabilizing arms. The blood flow was modeled as an incompressible Newtonian viscous fluid. Rigid geometric boundary conditions were assumed for all simulations. The governing equations were solved using the commercial software package [Fluent, V6.0.12]. The wall shear stress between stent struts was sensitive to the flow divider, and the wall shear stress distributions for different types of flow divider were calculated. Application of a flow divider led to noticeable increase in wall shear stress in stented segment

The effect of training maternal-fetal attachment behavior on primipara maternal mental health in the third trimester of pregnancy

Background and purpose: Mental health of mothers during pregnancy has considerable effects on fetal growth and consequently on baby's future health. Therefore, using various methods to enhance the mental health of mothers will have an important role in minimizing baby's and mother's problems. The present study was conducted to determine the effect of training maternal-fetal attachment on mother's mental health

Methods and materials: This interventional study was conducted on 83 pregnant women selected through purposive sampling from among the population of pregnant women admitted to health centers, and were divided randomly into case and control groups. Data collection instruments included interview checklist, MFAS, GHQ- 28. Cases received training on maternal-Fetal attachment behavior, but controls received only the routine pregnancy care. Scores of mental health and maternal-Fetal attachment before and after training were compared across the two groups. Chi- squre, Fisher's exact test, Mann Whitney U and t-test were used for data analysis

Results: The results indicated that differences in the mean score of mental health before training across the two groups were not statistically significant [p=0.51]. However, the difference came up to be significant after training [p<0.001]. Also, differences in the mean score of maternal-Fetal attachment behavior after training were significant across the two groups [p <0.001]

Conclusion: The results indicated that training mothers on maternal-Fetal attachment behavior can enhance mother's mental-health and their attachment with the fetus