Razi Journal of Medical Sciences

    Background & Aim: Diabetes is one of the risk factors for coronary artery diseases. Pathologic changes in the vasculature that occur in DM(Diabetes Mellitus) lead to coronary artery diseases. There are some reports that these groups of patients have longer ICU staying than non-diabetics. This descriptive cross-sectional study was undertaken to evaluate the effect of diabetes on pump time and ICU staying in CABG patients. Material & Method: During 2001 and 2002, 122 diabetic and non-diabetic patients who came to Namazi Hospital for coronary artery bypass grafting entered our study and their pump time and ICU staying were determined and analyzed statistically by Mann-whitney U test. Results: There was no difference between diabetics and non-diabetics regarding pump time and ICU staying. But the association between the number of coronary grafts and pump time and also pump time and ICU staying was significant. Conclusion: The results showed no significant difference between diabetics and non-diabetics in the length of ICU staying and pump time, but there was a linear relation between the pump time and ICU staying. The extensiveness of the coronary artery disease is the major determinant of the pump time and ICU staying after CABG(Coronary Artery Bypass Grafting).

Background: Shoes is the first point of contact between the foot and the ground in walking.Any change in that could affect the balance and postural stability. The risks associated with slipping and falling is related to the materials of footwear, surface condition, and geometric design of the shoe sole. The aim of this study was to measure the effect of different shoe sole tread groove depths on the stability during walking on dry and slippery surfaces.

Methods: In this semi-experimental study, 22 healthy young men with average age 24.5±3.43 years wore the oxford standard shoe and walked on two different surfaces (dry and slippery) with three different groove depths (1, 2.5 and 5 mm). In fact, there were six different test conditions. Data was collected by the VICON Motion Analysis system and Force plate set. The Paired T-test was performed to study the effects of groove depth and surface contamination on the Coefficient of Friction (COF) and Fluctuations Rate of Ankle (FRA).

Results: The results showed that on slippery and dry surfaces, increase in groove depths leads to increase of COF and decrease of FRA (p<0.05). Also values of COF on slippery surface were less than dry surface significantly (p<0.01).

Conclusion: The aim of this study was to find the groove depth which has the optimal stability. In our study, the deepest groove (5 mm) was better for reduction of FRA and increase of COF during walking on slippery and dry surfaces.