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People wearing a cast, brace shouldn’t drive

Journal of Bone and Joint Surgery, December 2010

People wearing a cast, brace shouldn’t drive

Driving is a bad idea for people who have to wear a cast, splint or brace while recovering from an injury or surgery to their right foot.

The researchers measured emergency braking time in volunteers using a brake adapted for use by the left foot, or wearing a short leg cast, a controlled ankle-motion boot, or normal footwear. It was found that, compared with a driver wearing normal footwear, those wearing a device or with adapted brakes in a car traveling at 60 miles per hour would travel: an additional 9.2 feet during emergency breaking if the driver is wearing a right lower-extremity controlled-ankle-motion boot; an additional 6.1 feet if the driver is wearing a right lower-extremity short leg cast; an additional 6 feet if the driver is using a left-foot braking adapter. It took much longer to brake when a driver is wearing an ankle immobilisation device than when wearing normal footwear.

In addition, compared with a driver wearing normal footwear, those wearing a device or with adapted brakes in a car traveling at 35 miles per hour would travel an extra 5.4 feet, 3.6 feet and 3.5 feet, respectively, which might mean the difference between avoiding or having a collision, the researchers noted.

The researchers did not find a device that was as safe as normal footwear. They only tested emergency braking situations, but it's reasonable to assume that if a person cannot stop quickly in an emergency, it may not be safe for that person to be driving.

Based on the above findings, the researchers cannot recommend that any patient return to driving using a brake adapter or wearing an immobilisation device on the right foot. Orthopaedic surgeons need to educate their patients about these safety concerns when discussing the best time to begin driving again.

Friday, 07 January 2011
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