TY - JOUR
T1 - The effect of immobilization devices and left-foot adapter on brake-response time
AU - Orr, Justin
AU - Dowd, Thomas
AU - Rush, Jeremy K.
AU - Hsu, Joseph
AU - Ficke, James
AU - Kirk, Kevin
N1 - Funding Information:
N ote : The authors acknowledge funding from the United States Army Institute of Surgical Research and the support of the Center for the Intrepid for allowing the use of their braking simulator.
PY - 2010/12/15
Y1 - 2010/12/15
N2 - Background: The ability to perform an emergency stop is essential for safe driving and can be represented by total brake-response time, reaction time, and braking time. Immobilization of the lower extremities is routinely performed for a variety of musculoskeletal conditions. This study sought to investigate the effect of immobilization with a left-foot driving adapter, a controlled-ankle-motion device, and a short leg cast on braking times. Our hypothesis was that there would be a significant difference in braking-time values between individuals utilizing a left-foot driving adapter or immobilization device and control individuals wearing normal footwear. Methods: A prospective, observational study was conducted to assess the effect of the immobilization devices on braking times. A driving simulator was used to assess total brake-response time, reaction time, and braking time in thirty-five volunteers. Volunteers were assessed while (1) wearing normal footwear (control group), (2) wearing a controlled-ankle-motion boot, (3) wearing a removable short leg cast, and (4) employing a left-foot driving adapter. Results: The mean total brake-response time was significantly increased as compared with that of the control group in all three study groups. The mean reaction time was significantly increased for the short leg cast and controlled-ankle-motion groups as compared with reaction time in the control group. The mean braking time was significantly increased in the controlled-ankle-motion and left-foot driving-adapter groups as compared with braking time in the control group. Conclusions: Total brake-response time while wearing a controlled-ankle-motion boot or a short leg cast or while utilizing a left-foot driving adapter is significantly increased, or worsened, as compared with the response time while wearing normal footwear. This information may prove valuable to physicians when counseling patients on when it may be safe to return to driving. Level of Evidence: Therapeutic Level II. See Instructions to Authors for a complete description of levels of evidence.
AB - Background: The ability to perform an emergency stop is essential for safe driving and can be represented by total brake-response time, reaction time, and braking time. Immobilization of the lower extremities is routinely performed for a variety of musculoskeletal conditions. This study sought to investigate the effect of immobilization with a left-foot driving adapter, a controlled-ankle-motion device, and a short leg cast on braking times. Our hypothesis was that there would be a significant difference in braking-time values between individuals utilizing a left-foot driving adapter or immobilization device and control individuals wearing normal footwear. Methods: A prospective, observational study was conducted to assess the effect of the immobilization devices on braking times. A driving simulator was used to assess total brake-response time, reaction time, and braking time in thirty-five volunteers. Volunteers were assessed while (1) wearing normal footwear (control group), (2) wearing a controlled-ankle-motion boot, (3) wearing a removable short leg cast, and (4) employing a left-foot driving adapter. Results: The mean total brake-response time was significantly increased as compared with that of the control group in all three study groups. The mean reaction time was significantly increased for the short leg cast and controlled-ankle-motion groups as compared with reaction time in the control group. The mean braking time was significantly increased in the controlled-ankle-motion and left-foot driving-adapter groups as compared with braking time in the control group. Conclusions: Total brake-response time while wearing a controlled-ankle-motion boot or a short leg cast or while utilizing a left-foot driving adapter is significantly increased, or worsened, as compared with the response time while wearing normal footwear. This information may prove valuable to physicians when counseling patients on when it may be safe to return to driving. Level of Evidence: Therapeutic Level II. See Instructions to Authors for a complete description of levels of evidence.
UR - http://www.scopus.com/inward/record.url?scp=78650450495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650450495&partnerID=8YFLogxK
U2 - 10.2106/JBJS.J.00225
DO - 10.2106/JBJS.J.00225
M3 - Article
C2 - 21159987
AN - SCOPUS:78650450495
SN - 0021-9355
VL - 92
SP - 2871
EP - 2877
JO - Journal of Bone and Joint Surgery - Series A
JF - Journal of Bone and Joint Surgery - Series A
IS - 18
ER -