Patent ID: 8401617

Claim:
A device for releasable mounting on an elongated, linear medical instrument, used in an ultrasound-guided procedure on a patient, the procedure being carried out by an ultrasound transducer to enable the position of the instrument to be tracked with respect to a patient by an EMT system, said device comprising a housing and an EM sensor, said housing being arranged to be releasably mounted on a first member that is coupled to the ultrasound transducer, the first member including a first keying element, said housing releasably mounting said sensor directly thereon and being directly releasably securable to the instrument at various positions along the length of the instrument, said housing comprising a first keying element, one of the first keying element of the first member and said first keying element of said housing being arranged to be releasably received within the other of the first keying element of the first member and said first keying element of said housing to enable the EMT system to register said sensor with respect to the ultrasound transducer.