Sensor with signature of data relating to sensor
First Claim
Patent Images
1. A pulse oximeter apparatus comprising:
- a pulse oximeter sensor having an output for providing a signal corresponding to a measured physiological characteristic;
a memory associated with the sensor and located external to a monitor which receives the sensor signal, said memory containing data relating to said sensor and containing a digital signature.
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Abstract
A sensor has codes useful for a monitor which can be authenticated as accurate. The sensor produces a signal corresponding to a measured physiological characteristic and provides codes which can be assured of being accurate and authentic when used by a monitor. A memory associated with the sensor stores both data relating to the sensor and a digital signature. The digital signature authenticates the quality of the code by ensuring it was generated by an entity having predetermined quality controls, and ensures the code is accurate.
239 Citations
20 Claims
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1. A pulse oximeter apparatus comprising:
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a pulse oximeter sensor having an output for providing a signal corresponding to a measured physiological characteristic;
a memory associated with the sensor and located external to a monitor which receives the sensor signal, said memory containing data relating to said sensor and containing a digital signature. - View Dependent Claims (2, 3, 4, 16)
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5. A method for creating a digital signature in a pulse oximeter apparatus including a memory associated with a pulse oximeter sensor having an output for providing a signal corresponding to a measured physiological characteristic, said method comprising:
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signing at least a portion of said data relating to said sensor to create a digital signature;
storing said digital signature in said memory; and
storing data relating to said sensor in said memory. - View Dependent Claims (6, 7, 8, 17)
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9. A pulse oximeter sensor reader comprising:
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a housing;
a sensor input for receiving a signal from a pulse oximeter sensor corresponding to a measured physiological characteristic;
a sensor processing circuit coupled to said sensor input;
a memory input for receiving digital data stored in a memory associated with said sensor, said digital data including a digital signature;
a first sensor reader memory coupled to said memory input for storing said digital data;
a second sensor reader memory storing a signature verification key;
a third sensor reader memory storing a program for verifying the digital signature of said digital data using said signature verification key; and
a transfer circuit for providing at least a portion of said digital data to said sensor processing circuit. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A pulse oximeter system comprising:
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(a) a pulse oximeter sensor apparatus including a sensor, said sensor having an output for providing a signal corresponding to a measured physiological characteristic, and a sensor memory associated with said sensor, said sensor memory having digital data relating to said sensor and having a digital signature, said digital signature being a signature of at least a portion of said data; and
(b) a pulse oximeter sensor reader including a sensor reader housing;
a sensor input for receiving said signal from said sensor corresponding to a measured physiological characteristic;
a sensor processing circuit coupled to said sensor input;
a memory input for receiving said digital data from said sensor memory;
a first sensor reader memory coupled to said memory input for storing said digital data;
a second sensor reader memory storing a signature verification key; and
a third sensor reader memory storing a program for verifying said digital signature using said signature verification key. - View Dependent Claims (18)
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19. A pulse oximeter apparatus comprising:
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a sensor having an output for providing a sensor signal corresponding to a measured physiological characteristic; and
an adapter coupled to said sensor, said adapter including a memory, said memory containing sensor data and containing a digital signature. - View Dependent Claims (20)
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Specification