Nurses' notes on sleep patterns in patients undergoing coronary artery bypass surgery: a retrospective evaluation of patient records.

In this study, patient records from 80 male patients, aged 43-76, undergoing first-time coronary artery bypass surgery were evaluated with regard to nurses' documentation on sleep during the first four postoperative days. This documentation was classified into descriptions of quality and quantity of sleep. Notations on sleep were found in 69-86% of patient records each night, and was most common the second night. Descriptions of both quality and quantity of sleep occurred in only 12 out of 320 patient-nights. Notes regarding duration of sleep were found for 146 patient-nights (45.6%), of which 103 (32.2%) contained sleep disturbances. Information on quality of sleep was given for 116 patient-nights (36.3%), with only 38 patient-nights (11.9%) of sleep disturbances. For 72 patient-nights, documentation of the patients' sleep was lacking. Frequent awakening was the most common sleep disturbances noted during all but the first night, when continuous awakening dominated. We conclude that the nurses' documentation regarding sleep and sleep disturbances varied over a wide range, with a mixture of quantitative and qualitative information, and that more structured descriptions are needed.