The effect of immobilization devices and left-foot adapter on brake-response time

Justin Orr, Thomas Dowd, Jeremy K. Rush, Joseph Hsu, James Robert Ficke, Kevin Kirk

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2871-2877
Number of pages7
JournalThe Journal of bone and joint surgery. American volume
Volume92
Issue number18
DOIs
StatePublished - Dec 15 2010
Externally publishedYes

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Immobilization
Reaction Time
Foot
Equipment and Supplies
Ankle
Leg
Control Groups
Volunteers
Aptitude
Observational Studies
Counseling
Lower Extremity
Emergencies
Prospective Studies
Physicians

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

The effect of immobilization devices and left-foot adapter on brake-response time. / Orr, Justin; Dowd, Thomas; Rush, Jeremy K.; Hsu, Joseph; Ficke, James Robert; Kirk, Kevin.

In: The Journal of bone and joint surgery. American volume, Vol. 92, No. 18, 15.12.2010, p. 2871-2877.

Research output: Contribution to journalArticle

Orr, Justin ; Dowd, Thomas ; Rush, Jeremy K. ; Hsu, Joseph ; Ficke, James Robert ; Kirk, Kevin. / The effect of immobilization devices and left-foot adapter on brake-response time. In: The Journal of bone and joint surgery. American volume. 2010 ; Vol. 92, No. 18. pp. 2871-2877.
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abstract = "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.",
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