| 摘要 |
A patient support ( 10, 14 ) includes a source of pressurized air ( 64 ), a bladder ( 30 ), a valve ( 66 ) in fluid communication with the source of pressurized air ( 64 ) and to the bladder ( 30 ), a pressure sensor ( 28 ) in fluid communication with the bladder ( 30 ), and a controller ( 26 ) responsive to a pressure signal from the pressure sensor ( 28 ). The controller ( 26 ) may determine a rate of change of pressure within the bladder ( 30 ) and may store historical pressure data.
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