Abstract: Extensive treatment requirements for patients in I.C.U. frequently result in interruption of their sleep. Sleep interruption can become sleep deprivation with physiological and psychological effects. To determine the amount of sleep patients in the I.C.U. received, a brief study was done in the form of a questionnaire to nursing staff. Noise levels in the I.C.U. were recorded over a period of time. From the study it was concluded the majority of patients were sleep deprived