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Abstract
Background: The study was to evaluate the effect of sleep deprivation on cognitive functions, and day-time sleepiness at baseline and following night shift at trauma units among faculty anesthesiologists and ICU residents in Kasr Alaini teaching hospitals. Methods: Psychomotor vigilance test (PVT) brief used to assess reaction time, alertness and rapid problem solving, trail making test ( TMT ) for information on visual search, scanning, speed of processing, mental flexibility, and executive functions, measuring day time sleepiness using karolinska sleepiness scale (KSS) and epworth sleepiness scale (ESS) that measures chance of dozing, fatigue and day time sleepiness in 50 residents between 25-28 years old at two points , a.pre night-shift b. post night-shift. Results: Mean sleeping hours at home were 7.16±1.390 hours, which reduced only to 2.88 ± 1.081 hours during the night shift. PVT scores showed reduced mean reaction time post-shift 371.9ms ±55.4 as compared to pre-shift mean reaction time 302.1ms ±35.2 with a p value 0.000. KSS pre-shift mean score changed from 3.34 ±1.189 to 6.24±1.589 with a p value 0.000. ESS results showed higher scores (higher chance of dozing) post night-shift than scores reported in pre-shift, with an average increase 8.18, mean score pre-shift was 6.68 ±2.759 and mean score post night-shift was 14.86±3.42 p value 0.000.TMT results in part A and part B, participants showed increase in time needed to complete tests post night-shifts with mean 44.86 sec ±9.370sec and 72.60 sec±12.294sec respectively, when compared to time needed for participants to finish part A and B pre night-shift with mean 38.82 sec ±8.458 sec and 63.16 sec±11.557 sec with p value 0.000 and p value 0.000 for both parts