Air mat for operation bed
First Claim
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1. A method of controlling the temperature of an air mat for an operation bed capable of periodically changing a support area of a patient, comprising the steps of:
- activating a heater for providing heat wherein the heater is on a lower surface of an air layer of the air mat;
measuring a synthesized temperature with a sensor provided on an upper surface of the air layer of the air mat and in a region on which the patient lies, the synthesized temperature being a composite temperature of both the patient and the air layer;
comparing the synthesized temperature with a first comparison temperature lower than a target temperature by a first predetermined temperature differential; and
reducing drive current to the heater when the measured temperature reaches the comparison temperature.
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Abstract
A plane heater is mounted on the lower surface of an air mat having a function of preventing bedsore, and the temperature of a patient is maintained via an air layer of the air mat. A time delay caused by heating via the air layer is adjusted through prediction control.
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Citations
12 Claims
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1. A method of controlling the temperature of an air mat for an operation bed capable of periodically changing a support area of a patient, comprising the steps of:
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activating a heater for providing heat wherein the heater is on a lower surface of an air layer of the air mat; measuring a synthesized temperature with a sensor provided on an upper surface of the air layer of the air mat and in a region on which the patient lies, the synthesized temperature being a composite temperature of both the patient and the air layer; comparing the synthesized temperature with a first comparison temperature lower than a target temperature by a first predetermined temperature differential; and reducing drive current to the heater when the measured temperature reaches the comparison temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification