Abstract
AIM: To report problems in the tethering catheter shaft of the Tempofilter, temporary caval filter.MATERIALS AND METHODS: Two cases are reported where the tethering catheter shaft of the Tempofilter buckled within the jugular vein.RESULTS: Buckling of the tethering shaft caused cephalic migration of the filter into the right atrium. Both filters were uneventfully removed without adverse sequelae.CONCLUSION: These cases demonstrate another mechanism of tethering shaft shortening which results in unexpected migration of the filter. This device is potentially dangerous because of the liability of the tethering cather to buckle at or near the insertion site with cephalic migration of the filter. Improvements in the tethering catheter mechanism need to be made before further patient usage. Kelly, I.M.G. and Boyd, C.S. (1999) Clinical Radiology54 , 398–401.
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