Patent ID: 8444578

Claim:
An external wearable ambulatory data recorder comprising: a housing; a sensor that generates a signal as a function of posture of a patient that wears the data recorder within the housing; a memory within the housing; a processor within the housing that receives the signal from the sensor, and stores posture data within the memory for the patient based on the signal; an element removably attached to the data recorder, wherein the processor calibrates the sensor in response to removal of the element, wherein to calibrate the sensor in response to the removal of the element, the processor identifies an initial value of the signal in response to the removal of the element and associates the initial value with a predetermined posture, wherein the posture data corresponds to values of the signal correlated to the initial value of the signal associated with the predetermined posture; and an adhesive, wherein the element comprises a removable layer attached to the adhesive, and wherein the adhesive is configured to attach the housing to the patient.