title: Blood flow responses over sacrum in nursing home residents during one hour bed rest.
abstract: To describe individual BF responses in a nursing home resident population for one-hour periods of bed rest.
  
  
  
  BF was measured for one hour over the sacrum in 0° supine position and 30° supine tilt position in 25 individuals aged 65 y or older while lying on a pressure-redistributing mattress. Measurements were made at three tissue depths (1, 2, and 10 mm) using the noninvasive optical techniques, LDF and PPG.
  
  
  
  Eleven participants had a PIV response at 1 mm depth in both positions and seven participants had a lack of this response at this depth and positions. The BF response at 1 mm depth appeared immediately and remained over, or below, baseline for the entire 60 min of loading in both positions. These BF patterns were also seen in deeper tissue layers.
  
  
  
  The cutaneous BF response among the nursing home residents was distinct, appeared early, and remained during the one hour of loading.
authors.affiliation: Department of Medical and Health Sciences, Division of Nursing Linköping University, Linköping, Sweden. ulrika.kallman@vgregion.se.|Department of Research, Södra Älvsborgs Sjukhus, Borås, Sweden. ulrika.kallman@vgregion.se.
authors.forename: Ulrika
authors.initials: U
authors.lastname: Källman
authors.affiliation: Department of Medical and Health Sciences, Division of Nursing Linköping University, Linköping, Sweden.
authors.forename: Sara
authors.identifier: 0000-0002-9663-3720
authors.initials: S
authors.lastname: Bergstrand
authors.affiliation: Department of Medical and Health Sciences, Division of Nursing Linköping University, Linköping, Sweden.
authors.forename: Anna-Christina
authors.initials: AC
authors.lastname: Ek
authors.affiliation: Department of Medical and Health Sciences, Division of Nursing Linköping University, Linköping, Sweden.
authors.forename: Maria
authors.initials: M
authors.lastname: Engström
authors.affiliation: Department of Medical and Health Sciences, Division of Nursing Linköping University, Linköping, Sweden.
authors.forename: Margareta
authors.initials: M
authors.lastname: Lindgren
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001510:Bed Rest; D005260:Female; D006801:Humans; D017078:Laser-Doppler Flowmetry; D008297:Male; D009735:Nursing Homes; D017156:Photoplethysmography; D012039:Regional Blood Flow; D012447:Sacrum / Q000098:blood supply*; D012867:Skin / Q000098:blood supply / Q000000981:diagnostic imaging; D016683:Supine Position
keywords: immobility; interface pressure; nursing home residents; pressure-induced vasodilation; tissue blood flow