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US 2013/0074262 A1Published application
Automatic patient weight measurement for determining pressure relief set points
AssigneeHill-Rom Services, Inc.
InventorsTimothy J. Receveur, Charles A. Lachenbruch
Life of this patent
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Abstract
A method and a system have been described to determine a pressure relief set point for a person-support apparatus. The method includes determining the change in pressure or volume in a zone from a vacant mode to a person occupied mode and computing the weight supported there from.
Claims14
A method of determining the weight of patient supported by a person support surface comprising:
- maintaining a predetermined pressure in at least one zone in said person support surface while said patient is not supported by said person support surface in a first mode;
- recording a second value of pressure in said at least one zone in said person support surface after said patient exerts weight on and is supported by said person support surface in a second mode;
- determining volume of a medium in said at least one zone of said person support surface in said second mode using said predetermined pressure in first mode, said second value of pressure in second mode and volume of the medium in first mode;
- determining a volume difference between said volume of medium in first mode and said volume of medium in second mode;
- determining density of medium in second mode using at least said second value of pressure;
- approximating weight of the person using said density of medium in said second mode and said volume difference.
3 more elements
A person-support apparatus comprising:
- a frame;
- a person support surface mounted over at least a portion of said frame, said person support surface comprising at least one pressurized zone;
- at least one pressure sensor configured to sense pressure of a medium in said at least one pressurized zone, said pressure sensor mounted to said person support surface;
- a controller configured to calculate the weight of a person supported by at least one pressurized zone of said person support surface based on input received by said at least one pressure sensor.
1 more element
A person-support apparatus with a frame, a person support surface mounted over at least a portion of the frame comprising:
- at least one pressure sensor configured to sense pressure in at least one pressurized zone of said person support surface;
- a controller configured to calculate the weight of a person supported by at least one pressurized zone of said person support surface based on input received by said at least one pressure sensor.
Dependencies are inferred from the claim text.