The present disclosure relates to a measurement ring for positioning at an orifice of a patient. The measurement ring comprises a hollow channel, an annular lip, at least one sensor and a communication unit. The annular lip is located at a first extremity of the hollow channel. The annular lip and hollow channel form an insertion channel for inserting at least one instrument in the orifice of the patient. The at least one sensor measures at least one parameter related to insertion of the instrument in the insertion channel and generate insertion data. The communication module transmits the insertion data to a monitoring apparatus.
