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Showing 3 results for Ravanbod
Volume 8, Issue 4 (Fall 2020)
Abstract
Aims: The aim was to investigate lower extremity muscle strength by a handheld dynamometer and to assess the possible correlation between fear of falling and muscle strength in diabetic peripheral neuropathy.
Materials & Methods: In this cross-sectional study, 15 patients with diabetic peripheral neuropathy were evaluated based on the Michigan neuropathy screening instrument, and ten healthy control were enrolled. The study was performed in the clinical and research center of Tarbiat Modares University's movement disorders between February and May 2020. Fall efficacy scale-International was completed to assess fear of falling. Muscle strength of the peroneus longus, tibilalis anterior, gastrosoleus, Hamstring, vastus lateralis, quadriceps femoris, gluteus maximus, and hip abductors of the dominant (right) lower extremity was measured by a handheld dynamometer. SPSS 22 was used for data processing. An independent t-test, Pearson correlation, and regression analysis were used to analyze data.
Findings: There was a moderate and negative correlation between fall efficacy scale-International and gastrosoleus time to peak (r=-0.0607; p=0.016), and a strong correlation between fall efficacy scale-International and Michigan neuropathy screening instrument (r=0.709; B=1.829; p=0.003). All the time-to-peak force results were higher in diabetic peripheral neuropathy than healthy control and became significant in tibilalis anterior, quadriceps femoris, and gluteus maximus (p<0.05). The augmented force of the gluteus maximus was significantly lower in diabetic peripheral neuropathy (p=0.021).
Conclusions: Gastrosoleus rate of force development has a negative correlation with fear of falling. Fall efficacy scale-International and Michigan neuropathy screening instruments have a strong correlation.
Roya Ravanbod, Giti Torkaman, Ali Esteki,
Volume 13, Issue 1 (1-2010)
Abstract
Objective: To investigate the friction of rabbit’s knee joint with designed pendulum friction tester to diagnose and evaluate different pathological and therapeutic conditions following haemarthrosis, osteoarthritis, and other joint disorders.
Materials and Methods: Friction coefficient of 10 adult male Albino rabbit’s joint (5 right and 5 left knees) weighted 1.59 ± 0.27 Kg, after designing and compiling the instrument and its processing software in the Physiotherapy department of Tarbiat Modares University were measured. Maximaum pendulum rotation, number of oscillations to reach equilibrium, coefficient of friction with Stanton’s equation, exponential and linear curve fitting, average logarithmic and linear decrement methods were measured.
Results: Maximum rotation after pendulum releasing in the left joints were higher than the right ones, P<0.001. Number of oscillations to reach equilibrium in the left knees were also greater than the right knees, P=0.005. All different friction estimation methods had the same results and showed greater friction in the right in comparison to the left side.
Conclusion: The pattern of the joints amplitude decay did not have a linear behaviour and the rabbit’s knee joint coefficient of friction with nonlinear estimations was less than linear ones. The findings revealed that selecting a separate control group in such investigation is essential and the contralateral limb could not be considered as control group. Pendulum friction tester has the capability of evaluating changes in coefficient of friction after application of different therapeutic methods. These changes have
important role in diagnosis, evaluation of joint diseases and developing techniques for treating those pathologies.
Mahmoud Ahmadi-Fakhre, Giti Torkaman, Roya Ravanbod,
Volume 23, Issue 5 (Winter 2021)
Abstract
Introduction: Osteoarthritis is the most common type of arthritis and is one of the most common causes of pain and disability in adults. In the present study we investigated the level of inflammatory cytokines IL-1β and TNF-α and the amount of joint friction after non-traumatic model of knee osteoarthrosis in guinea pig.
Materials & Methods: Twenty-four matured albino male Dunkin-Hartley guinea pigs were assigned randomly into two groups; osteoarthrosis (OA) and control (n=12 in each group). The non-traumatic OA was induced by intra-articular injection of mono iodoacetate (MIA, 3 mg/kg) in the knee joint. Joint circumstance and weight of subjects were measured initially and after thirty days of MIA injection. After scarifying the animals on day 30, the level of IL-1β and TNF-α in synovial membrane and knee joint friction were measured. Control group received no intervention and all evaluations were performed on the normal knee joint.
Results: The induction of OA caused a significant increase in the joint circumstance compared to control group (P<0.05). 30 days after induced OA, the knee joint friction in flexion and extension movement was significantly increased compared to control group. In OA group, the level of IL-1β and TNF-α showed a significant increase compared to control group (P<0.05). There was a positive correlation between IL-1β, TNF-α and knee joint friction (P<0.01).
Discussion: Non-traumatic osteoarthritis may increase the expression of inflammatory cytokines and joint friction, which in this condition the joint movement can aggravate cartilage damage.
