A medical device (50) includes a disposable Ear-Nose-Throat (ENT) tool (28), a reusable handle (30), and a processor (34). The ENT tool (28) is configured to perform a medical procedure in a patient ENT organ. The reusable handle (30) is configured to hold and control the disposable ENT tool (28), and includes a position sensor (54) configured to produce one or more position signals that are indicative of a first position of the reusable handle (30). The processor (34) is configured to receive the position signals from the position sensor (54), and to estimate, based on the position signals, a second position of the disposable ENT tool (28) in the patient ENT organ.
