Ultrasonic B-scanning is a convenient method of confirming the presence of an IUD within the endometrial cavity. The acoustic properties of each device from normal uterine tissue are demonstrated according to the particular type of device used. These produce easily recognizable patterns. The value of ultrasonic scanning the the event of malposition, expulsion, perforation, and unplanned pregnancy with an IUD in situ are discussed. Ultrasonic scanning is a safe, noninvasive method of locating an IUD within the uterine cavity and thereby assessing correct placement. Difficulties encountered in localization of the IUD within the uterine cavity are also discussed. Methods of management of a misplaced IUD are further presented.
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