The micromotor with stator windings in the form of flexible printed circuits for an ultrasound - instrument

摘要

A disposable intra-luminal ultrasonic instrument (1') for the examination and/or treatment of blood vessels and similar lumina has a small transverse cross section. The instrument includes a catheter (1) comprising a body and a tip (2') having a distal end and a distal portion adapted to be introduced into a lumen and a proximal portion. The catheter (1) has a diameter not greater than 3 millimeters, a rotatable member (5) in the tip (2'), a micro mottor (3) for rotating the rotatable member (5) at a selected rpm, the motor having flat stator coils (41-44) mounted on a flexible circuit board (40), and means (7) for generating and supplying sound waves to the rotatable member.