URL: https://www.desy.de/school/school_lab/zeuthen_site/vacuum_lab/vacuum_information/applications/vacuum_cushions/index_eng.html
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Vacuum Cushions
Vacuum cushions and mattresses are applied in medical ambulance cars. If bone fractures need to be immobilized until further treatment, e.g. an arm is put into a specially shaped vacuum cushion filled with pellets, and hence air is pumped out of it. The cushion then tightens closely around the extremity and becomes stable and fixed.