title: The nature of sleep in 10 bedridden elderly patients with disorders of consciousness in a Japanese hospital.
abstract: No previous study has satisfactorily clarified the nature of sleep in elderly bedridden people with disorders of consciousness (DOC). The objective of the present study was to clarify the sleep states of 10 elderly bedridden patients with DOC in a Japanese hospital to facilitate provision of evidence-based nursing care and appropriate adjustment of patients' environments. Nocturnal polysomnography recordings were analyzed according to the standard scoring criteria, and the patients' sleep stages and quality were investigated. Of the 10 patients, 9 showed slow wave sleep (SWS), 4 showed very high values for sleep efficiency (96-100%), and in 3 of these patients, the percentage of SWS was ≥ 20%. Furthermore, three of these four patients had 200 or more changes in sleep stage. Although the mechanism is unknown, the amount of SWS combined with the value of sleep efficiency suggests that the quality of sleep is poor in elderly bedridden patients with DOC. Further study is needed to determine better indicators of good sleep in this population.
authors.affiliation: Department of Clinical Nursing, Division of Health Science, Graduate School of Medicine, Kanazawa University, Ishikawa, Japan.
authors.forename: Masaru
authors.initials: M
authors.lastname: Matsumoto
authors.affiliation: School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan Wellness Promotion Science Center, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan junkosgm@mhs.mp.kanazawa-u.ac.jp.
authors.forename: Junko
authors.initials: J
authors.lastname: Sugama
authors.affiliation: School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan.
authors.forename: Tetsu
authors.initials: T
authors.lastname: Nemoto
authors.affiliation: East Medic Corporation, Ishikawa, Japan.
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Kurita
authors.affiliation: Faculty of Nursing, Osaka Medicine College, Osaka, Japan.
authors.forename: Junko
authors.initials: J
authors.lastname: Matsuo
authors.affiliation: School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan.
authors.forename: Misako
authors.initials: M
authors.lastname: Dai
authors.affiliation: Kobe City Medical Center General Hospital, Hyogo, Japan.
authors.forename: Miyuki
authors.initials: M
authors.lastname: Ueta
authors.affiliation: School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Okuwa
authors.affiliation: School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan.
authors.forename: Toshio
authors.initials: T
authors.lastname: Nakatani
authors.affiliation: Sengi Hospital, Ishikawa, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Tabata
authors.affiliation: Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Sanada
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003244:Consciousness Disorders / Q000503:physiopathology*; D005260:Female; D006761:Hospitals; D006801:Humans; D007564:Japan; D008297:Male; D017286:Polysomnography; D012890:Sleep
keywords: bedridden elderly; disorders of consciousness; gerontological nursing; sleep