FIELD: medical technique, namely prophylaxis and treatment of bedsores occurred in the result of bad blood circulation.
SUBSTANCE: bedsore preventing device includes compressed air source, row of even and odd inflatable chambers arranged in common mattress, fluidic bi-stable member having supply duct, two control ducts, two outlet ducts and two atmosphere ducts. Supply duct of bi-stable member is communicated with compressed air source. One outlet duct of fluidic bi-stable member is communicated with row of odd-number inflatable chambers and through feedback duct it is communicated with respective control duct of fluidic bi-stable member. Second outlet duct of fluidic bi-stable member is communicated with row of even-number inflatable chambers and through feedback duct it is communicated with respective control duct of fluidic bi-stable member. Fixed throttle is arranged in each feedback duct. Tuning throttle is arranged in each atmosphere duct.
EFFECT: simplified adjustment and increased range of air pressure control in inflatable chambers.
1 dwg
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