NFC Security for Medical Device and Sheath

A method comprising:

• providing an oximeter device and a sheath into which the oximeter device can be inserted;
• after the oximeter device is inserted in the sheath, retrieving information by a first communication device of the oximeter device from a second communication device of the sheath using near-field communication (NFC), wherein the information comprises a first identifier code for the sheath;
• at the oximeter device, retrieving a second identifier code for the sheath from a server;
• comparing the first and second identifier codes;
• if the first and second identifier codes match, enabling the oximeter device to make oximetry measurements of tissue.

A method comprising:

• providing an oximeter device and a sheath into which the oximeter device can be inserted;
• after the oximeter device is inserted in the sheath, retrieving information by a first communication device of the oximeter device from a second communication device of the sheath using near-field communication (NFC), wherein the information comprises a first identifier code for the sheath;
• at the oximeter device, retrieving a second identifier code for the sheath from a server;
• comparing the first and second identifier codes;
• if the first and second identifier codes do not match, enabling the oximeter device to make oximetry measurements of tissue.