Intracaval breakage of umbrella filter.

This is a case report of the breakage of an umbrella filter 2 years after it had been inserted into the inferior vena cava of a young, active woman. The possible causes of the breakage are discussed. The authors feel that metal fatigue of the ribs of the filter was the most likely cause of the breakage. The varying degrees of intracaval pressure resulting from the normal physical activity of this patient could explain the metal fatigue. the potential dangers of this complication, as well as of other complications associated with the use of this type of device, also are discussed. The authors feel that the age and the likely subsequent physical activity of the patient are important factors to be considered when choosing this modality of treatment for pulmonary embolism.