Method and computer program for authenticating a physiological sensor, a sensor system, a patient monitor, and a physiological sensor
First Claim
1. A method for authenticating a physiological sensor, the method comprising:
- examining, in response to a sensor being connected to a patient monitor, whether a first sensor-specific usage count of the connected sensor is greater than or equal to a second sensor-specific usage count of the connected sensor, wherein the first and second sensor-specific usage counts are indicative of cumulative usage of the connected sensor and wherein the first sensor-specific usage count is stored in the connected sensor and the second sensor-specific usage count is stored in a host memory external to the connected sensor;
allowing use of the connected sensor in the patient monitor when the examining indicates that the first sensor-specific usage count is greater than or equal to the second sensor-specific usage count for the connected sensor;
rejecting the use of the connected sensor in the patient monitor when the examining indicates that the first sensor-specific usage count is less than the second sensor-specific usage count of the connected sensor; and
updating the first and second usage counts for the connected sensor in response to the use of the connected sensor in the patient monitor, thereby to keep the first and second sensor-specific usage counts of the connected sensor consistent and updated for a subsequent use attempt of the connected sensor.
1 Assignment
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Accused Products
Abstract
A mechanism for authenticating a physiological sensor is disclosed. When a sensor is connected to a monitor, the monitor examines whether a first sensor-specific usage identifier of the connected sensor is consistent with a second sensor-specific usage identifier thereof. The first and second sensor-specific usage identifiers are indicative of the cumulative usage of the connected sensor, but may nevertheless be unequal. The first sensor-specific usage identifier is maintained in the sensor and the second sensor-specific usage identifier in a host memory external to the sensor. The use of the connected sensor is allowed when the examining indicates that the said two identifiers of the connected sensor are consistent, and rejected when the identifiers are inconsistent. The two identifiers are further updated in response to the use of the connected sensor in the patient monitor, thereby to keep the said identifiers consistent and updated for a subsequent use attempt of the sensor.
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Citations
13 Claims
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1. A method for authenticating a physiological sensor, the method comprising:
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examining, in response to a sensor being connected to a patient monitor, whether a first sensor-specific usage count of the connected sensor is greater than or equal to a second sensor-specific usage count of the connected sensor, wherein the first and second sensor-specific usage counts are indicative of cumulative usage of the connected sensor and wherein the first sensor-specific usage count is stored in the connected sensor and the second sensor-specific usage count is stored in a host memory external to the connected sensor; allowing use of the connected sensor in the patient monitor when the examining indicates that the first sensor-specific usage count is greater than or equal to the second sensor-specific usage count for the connected sensor; rejecting the use of the connected sensor in the patient monitor when the examining indicates that the first sensor-specific usage count is less than the second sensor-specific usage count of the connected sensor; and updating the first and second usage counts for the connected sensor in response to the use of the connected sensor in the patient monitor, thereby to keep the first and second sensor-specific usage counts of the connected sensor consistent and updated for a subsequent use attempt of the connected sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer program product for authenticating a physiological sensor connected to a patient monitor, the computer program product comprising:
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a first program product portion configured retrieve, upon connection of a sensor to a patient monitor, a first usage count of the connected sensor from said sensor and a second usage count of the connected sensor from a host memory external to the connected sensor, wherein the first and second usage counts are indicative of cumulative usage of the connected sensor; a second program product portion configured to examine whether the retrieved first usage count is greater than or equal to the second usage count of the connected sensor; a third program product portion configured to allow use of the connected sensor when the first usage count is greater than or equal to the second usage count and to reject the use of the connected sensor when the first usage count is less than the second usage count; and a fourth program product portion configured to update the first and second usage counts of the connected sensor in response to the use of the connected sensor, thereby to keep the first and second usage counts of the connected sensor consistent and updated for a subsequent use attempt of the sensor.
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9. A method for authenticating a physiological sensor, the method comprising:
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identifying the connection of the sensor to a patient monitor; determining in the patient monitor a relationship between a first sensor-specific usage count and a second sensor-specific usage count for the connected sensor, wherein the first and second sensor-specific usage counts are indicative of cumulative usage of the connected sensor, wherein the first sensor-specific usage count is stored in the connected sensor and the second sensor-specific usage count is stored in a memory unit external to the connected sensor; allowing use of the connected sensor with the patient monitor when the first sensor-specific usage count is greater than or equal to the second sensor-specific usage count; rejecting the use of the connected sensor with the patient monitor when the first sensor-specific usage count is less than the second sensor-specific usage count; and updating the first and second sensor-specific usage counts upon the authorized use of the connected sensor with the patient monitor. - View Dependent Claims (10, 11, 12, 13)
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Specification