A method for securely affixing a sensor to a patient is provided. The method includes attaching the sensor to the patient's index finger with a sensor signal cable routed along the patient's hand, and configuring an identification band to encircle the signal cable and the patient's wrist using a secure affixing arrangement. The identification band is configured to evidence tampering when removed. The secure affixing arrangement may take various forms, including tying loops and securing the cable and/or sensor to the patient using tape, plastics, and so forth.