Advisor Information
Sara Myers
Location
Dr. C.C. and Mabel L. Criss Library
Presentation Type
Poster
Start Date
3-3-2017 10:45 AM
End Date
3-3-2017 12:00 PM
Abstract
Peripheral artery disease (PAD) is caused by blockages in the lower extremity arteries that results in pain during walking known as claudication. Gait variability has emerged as a functional assessment in older and pathological groups1. A healthy gait pattern demonstrates stride-to-stride fluctuations within a certain range of values.2 This study uses standard deviation (SD) and coefficient of variation (CV) to assess the magnitude of variability in the time series. . We compared variability before and after surgery that restores blood flow to the legs of patients with PAD.. Thirty-nine subjects were recruited from the Veteran’s Affairs Medical Center. The setup included subjects walking on the treadmill while kinematic data was collected. The subjects walked completed a graded walking test on the treadmill until the first sign of pain, recorded as initial claudication distance. Absolute claudication distance was recorded as the distance walked until maximum pain. For the graded test subjects walked at two miles/hour, with a 2% increase in grade every two minutes. The dependent variables calculated included: mean ROM, SD ROM, and CV ROM of the joint angle time series, six minute walking distance, ICD, and ACD. Dependent t-tests were used to compare baseline with post-surgery values. Significant differences between the baseline and post-surgery mean ROM, SD ROM, CV ROM, six minute walking distance test, ICD, and ACD values were found.
REFERENCES
1. Brach JS, Berlin JE, VanSwearingen JM, Newman AB, Studenski SA. Too much or too little step width variability is associated with a fall history in older persons who walk at or near normal gait speed. J Neuroengineering Rehabil. 2005 Jul 26;2:21.
2. Myers, S. A., Johanning, J. M., Stergiou, N., Celis, R. I., Robinson, L., & Pipinos, I. I. (2009). Gait variability is altered in patients with peripheral arterial disease. Journal of vascular surgery, 49(4), 924-931.
Range of Motion and walking distances in Subjects with Peripheral Artery Disease
Dr. C.C. and Mabel L. Criss Library
Peripheral artery disease (PAD) is caused by blockages in the lower extremity arteries that results in pain during walking known as claudication. Gait variability has emerged as a functional assessment in older and pathological groups1. A healthy gait pattern demonstrates stride-to-stride fluctuations within a certain range of values.2 This study uses standard deviation (SD) and coefficient of variation (CV) to assess the magnitude of variability in the time series. . We compared variability before and after surgery that restores blood flow to the legs of patients with PAD.. Thirty-nine subjects were recruited from the Veteran’s Affairs Medical Center. The setup included subjects walking on the treadmill while kinematic data was collected. The subjects walked completed a graded walking test on the treadmill until the first sign of pain, recorded as initial claudication distance. Absolute claudication distance was recorded as the distance walked until maximum pain. For the graded test subjects walked at two miles/hour, with a 2% increase in grade every two minutes. The dependent variables calculated included: mean ROM, SD ROM, and CV ROM of the joint angle time series, six minute walking distance, ICD, and ACD. Dependent t-tests were used to compare baseline with post-surgery values. Significant differences between the baseline and post-surgery mean ROM, SD ROM, CV ROM, six minute walking distance test, ICD, and ACD values were found.
REFERENCES
1. Brach JS, Berlin JE, VanSwearingen JM, Newman AB, Studenski SA. Too much or too little step width variability is associated with a fall history in older persons who walk at or near normal gait speed. J Neuroengineering Rehabil. 2005 Jul 26;2:21.
2. Myers, S. A., Johanning, J. M., Stergiou, N., Celis, R. I., Robinson, L., & Pipinos, I. I. (2009). Gait variability is altered in patients with peripheral arterial disease. Journal of vascular surgery, 49(4), 924-931.