Patent ID: 8417309

Claim:
A sensor comprising: a ring configured to be placed on a patient's finger and to maintain a continuous loop when removed from the patient's finger and configured to maintain the continuous loop when adjusting the size of the ring, wherein the ring comprises an inelastic segment configured to be placed around the patient's finger, and an elastic segment coupled to the inelastic segment, the elastic segment having a fastener to secure the ring to the patient's finger; a sensor body being integrally coupled to the ring and having a substantially closed end and a substantially open end, the substantially open end being coupled to the ring, and the substantially closed end configured to at least partially enclose a distal end of the patient's finger when the ring is placed on the patient's finger; a securing mechanism coupled to the sensor body, the securing mechanism configured to secure the sensor body to the finger; and a sensor disposed on the sensor body, the sensor configured to communicatively couple to the patient's finger.