CANNULATION OF BLOOD VESSELS

摘要

A device for use in the cannulation of blood vessels comprises a trocar 26 which is positionable within a hollow needle 24. The trocar comprises a support rod 40, an ultrasonic transducer 34 supported at one end of the rod for transmitting and receiving ultrasonic waves and electrical conductors 42 and 48 associated with the rod 40 for transmitting electrical signals to and from the transducer 34.