Presentation Title

Improvement of Joint Torques and Powers before and after surgery for patients with peripheral arterial disease

Advisor Information

Sara Myers

Location

Dr. C.C. and Mabel L. Criss Library

Presentation Type

Poster

Start Date

7-3-2014 1:00 PM

End Date

7-3-2014 4:00 PM

Abstract

Peripheral arterial disease (PAD) is a manifestation of atherosclerosis of the leg arteries, is highly prevalent in the United States and is associated with increased cardiovascular morbidity and mortality. Surgical revascularization is recommended for patients with moderate to severe occlusions, but no one has tested whether gait improves after surgery. Thus, this study determined the differences in lower extremity joint torques and powers of the before and after surgery. Twenty-four patients with PAD (176.1±5.9 cm, 90.9±18.2 kg; 32 claudicating limbs) performed walking trials at a self-selected speed through a ten-meter pathway while kinematics (60 Hz; 12 camera Motion Analysis Corp., Santa Rosa, CA, USA) and kinetics (600 Hz; Kistler Instruments, Winterthur, Switzerland) were recorded. Subjects completed five trials on each leg before and after the onset of claudication. Testing was performed prior to and three months following surgery. In the pain-free condition, ankle power absorption (p<0.001), knee power absorption (p=0.005) and hip power generation (p=0.002) in early stance were significantly increased after surgery. Peak hip extensor torque (p=0.009) and ankle power generation (p=0.005) in late stance were significantly increased. In the pain condition, knee extensor torque (p=0.026), hip power generation (p=0.001), peak ankle dorsiflexor torque (p=0.023), ankle power absorption (p<0.001) in early stance and peak hip extensor torque (p<0.001) in late stance were significantly increased after surgery. The increases in lower extremity torques and powers represent an improvement in patients with PAD following surgery.

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Mar 7th, 1:00 PM Mar 7th, 4:00 PM

Improvement of Joint Torques and Powers before and after surgery for patients with peripheral arterial disease

Dr. C.C. and Mabel L. Criss Library

Peripheral arterial disease (PAD) is a manifestation of atherosclerosis of the leg arteries, is highly prevalent in the United States and is associated with increased cardiovascular morbidity and mortality. Surgical revascularization is recommended for patients with moderate to severe occlusions, but no one has tested whether gait improves after surgery. Thus, this study determined the differences in lower extremity joint torques and powers of the before and after surgery. Twenty-four patients with PAD (176.1±5.9 cm, 90.9±18.2 kg; 32 claudicating limbs) performed walking trials at a self-selected speed through a ten-meter pathway while kinematics (60 Hz; 12 camera Motion Analysis Corp., Santa Rosa, CA, USA) and kinetics (600 Hz; Kistler Instruments, Winterthur, Switzerland) were recorded. Subjects completed five trials on each leg before and after the onset of claudication. Testing was performed prior to and three months following surgery. In the pain-free condition, ankle power absorption (p<0.001), knee power absorption (p=0.005) and hip power generation (p=0.002) in early stance were significantly increased after surgery. Peak hip extensor torque (p=0.009) and ankle power generation (p=0.005) in late stance were significantly increased. In the pain condition, knee extensor torque (p=0.026), hip power generation (p=0.001), peak ankle dorsiflexor torque (p=0.023), ankle power absorption (p<0.001) in early stance and peak hip extensor torque (p<0.001) in late stance were significantly increased after surgery. The increases in lower extremity torques and powers represent an improvement in patients with PAD following surgery.