A quantitative analysis of microcirculation in sore-prone pressure areas on conventional and pressure relief hospital mattresses using laser Doppler flowmetry and tissue spectrophotometry

BACKGROUND Pressure ulcers are associated with severe impairment for the patients and high economic load. With this study we wanted to gain more insight to the skin perfusion dynamics due to external loading. Furthermore, we evaluated the effect of different types of pressure relief mattresses. METHODS A total of 25 healthy volunteers were enrolled in the study. Perfusion dynamics of the sacral and the heel area were assessed using the O2C-device, which combines a laser light, to determine blood flow, and white light to determine the relative amount of hemoglobin. Three mattresses were evaluated compared to a hard surface: a standard hospital foam mattress bed, a visco-elastic foam mattress, and an air-fluidized bed. RESULTS In the heel area, only the air-fluidized bed was able to maintain the blood circulation (mean blood flow of 13.6 ± 6 versus 3.9 ± 3 AU and mean relative amount of hemoglobin of 44.0 ± 14 versus 32.7 ± 12 AU.) In the sacral area, all used mattresses revealed an improvement of blood circulation compared to the hard surface. CONCLUSION The results of this study form a more precise pattern of perfusion changes due to external loading on various pressure relief mattresses. This knowledge may reduce the incidence of pressure ulcers and may be an influencing factor in pressure relief mattress selection.

Central-Verein deutscher Staatsbürger jüdischen Glaubens : Bericht der Rechtsschutz-Commission über ihre bisherige Thätigkeit erstattet in d. ordentl. Versammlung vom 16. Apr. 1894

durch Eugen Fuchs

Auff das am 26ten Januar ergangene Decretum anbefohlene gehorsame Erklärungs-Deduction : Auß welchen Ursachen, die, an die Judenschafft beschehene Uberlassung des Völckerischen Gartens, wie auch anderer ... ohngültig, und solche Stück wiederum der Bürgerschafft einzuraumen ; In causa Commissionis Der Impetrantischen Burgerschafft der Kaiserlichen Reichs- auch Wahl- und Crönungs-Stadt Contrà E. E. Ruth[!] allda ; Den ... Febr. 1714 bey Kaiserl. Commission übergeben

Unser, Der Burgerlichen Deputirten [[Elektronische Ressource]]