Abstract: A method of using an oximeter sensor assembly including the steps of detecting light from a light emitting element and storing digital data in a memory associated with the sensor assembly. The stored digital data includes coefficients for use by an oximeter monitor coupled to the sensor assembly to calculate data from the detected light, wherein the coefficients represent a combination of different sensor-specific characteristics, application-specific characteristics, and patient-specific characteristics. Control means including means for processing received information signals in accordance with the equation in response to received coefficients to determine blood oxygen levels is provided.

Abstract: A flexible finger sensor having a finger entrance, a sensor holder at a distal end of the assembly, and a fenestrated region disposed between the finger entrance and the sensor holder. A displacement resistant finger sensor and method of use for reducing motion-related artifacts by mechanical isolation from external forces by providing a resilient sensor body having a digit entrance, a sensor holder, and a fenestrated region between the digit entrance and the sensor holder. The sensor holder maintains sensing elements relative to a user's finger, with said sensing elements being in communication with a monitoring device via a lead wire. The lead wire may extend at a lateral edge of the sensor body. A force to the lead wire may be applied so as to distort the fenestrated region without substantially disturbing the sensing elements relative to the finger surface.