The Kimray-Greenfield filter: evaluation by duplex real-time/pulsed Doppler ultrasound

Radiology. 1983 Jul;148(1):223-6. doi: 10.1148/radiology.148.1.6856840.


The Kimray-Greenfield filter is a wire cage which is inserted into the inferior vena cava (IVC) to prevent thrombi originating in pelvic and leg veins from embolizing to the lungs. Duplex real-time/pulsed Doppler ultrasound was used to evaluate placement and function in 38 patients (46 examinations). Real-time examination successfully identified the IVC and filter in 89% of cases. Pulsed Doppler studies demonstrated flow above and below the filter in 76%, accurately predicting normal flow in most cases. In 4 patients, Doppler scans revealed little or no flow distal to the filter; contrast cavograms confirmed obstruction secondary to thrombosis. This appears to be an accurate, noninvasive method of assessing postoperative reliability of the Kimray-Greenfield filter.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Blood*
  • Evaluation Studies as Topic
  • Humans
  • Middle Aged
  • Regional Blood Flow
  • Thrombosis / therapy
  • Ultrafiltration / instrumentation*
  • Ultrasonics / instrumentation*
  • Ultrasonography
  • Vena Cava, Inferior*