Regulations on working hours

Not all countries regulate working hours, but in those that do, the maximum hours per week for a doctor in training can range from as little as 37 hours in Denmark to 80 hours in the United States. The European Working Time Directive decreased the weekly hours for trainees to 48 in August 2009.1 In the United States, the Accreditation Council for Graduate Medical Education (ACGME) imposed a national limit of 80 hours weekly for all medical trainees in 2003. The Institute of Medicine has just called for greater restrictions, suggesting a five hour “nap” between 10 pm and 8 am for extended shifts and more time off after working periods—from 10 hours after a day shift to 48 hours after three nights of consecutive duty.2

Sleep researchers applaud these efforts. Heavy night call, defined as every fourth or fifth night, has been shown to compromise attention and vigilance as much as alcohol intoxication,3 and sleep deprived surgeons have exhibited impaired psychomotor performance with laparoscopic simulators.4 As ludicrous as taking a nap while on call may seem, late evening and early morning hours are associated with low temperature and cortisol levels and, in turn, low arousal states, …