The panels say the agency should tell medical examiners that drivers with a body mass index of 35 or more must be evaluated for sleep apnea. In a Federal Register notice posted today, the agency asks for comments on this and a number of additional recommendations concerning apnea screening, evaluation and treatment.
The recommendations will provide guidance to examiners, but the panels see this as an interim step toward a comprehensive rule.
The guidance includes conditions which should trigger immediate disqualification of a driver, such as falling asleep while driving or having a fatigue-related crash, pending evaluation and treatment for sleep apnea. The examiner could approve a 60-day conditional card during evaluation and treatment.
The two panels are the agency's Medical Review Board, a panel of five physicians who advise the agency on medical issues, and the Motor Carrier Safety Advisory Committee
The Medical Review Board has long been pushing stricter regulatory standards for sleep apnea. In 2008 the Board recommended that the agency require all drivers to be screened for obstructive sleep apnea, a significant change from the current rules that do not explicitly require testing and treatment.
The selection of a body mass index of 35 as a trigger for screening arose from research that shows BMI, a measurement of body fat based on height and weight, is a primary indicator that a person may have sleep apnea.
The higher the BMI, the greater the likelihood of sleep apnea. There are other indicators, such as middle age and male gender, but BMI would be an effective tool for medical examiners to make the initial screening, the Board found.
Examiners need a prescriptive BMI number, said Benjamin Hoffman, chairman of the Medical Review Board, at a conference last December. A BMI of 35 is a reliable indicator of sleep apnea, he said.
Members of the Board say sleep apnea can lead to chronic fatigue, which in turn causes performance problems such as slowed reaction time, lapses of attention and distractibility.
The crash risk for a person with sleep apnea is 242% greater than a person without the disorder, according to Charles Czeisler, professor of sleep medicine at Harvard Medical School.
Understanding of the problem is not widespread in the trucking industry, but awareness is growing and a number of carriers have implemented groundbreaking programs to screen drivers for apnea and treat them if they have it.
Schneider National, for instance, has put in place a program that produced a 30% reduction in crash rates and a 48% reduction in the median cost of crashes. The kicker has been a savings of $539 per driver per month in health care costs, according to senior safety VP Don Osterberg at a sleep apnea conference in 2010.
Treatment for the disorder is typically handled with a nighttime sleep-aid device that provides continuous positive airway pressure, called CPAP for short.
41% of Australian Truck Drivers Have Sleep Apnea, Study Says,4/4/2012
Advisory Panels Urge Tougher Screening for Sleep Apnea, 12/8/2011