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Northwestern Radiology IVC Filter Clinic

Likelihood of retrieval calculator

Likelihood that an optional filter becomes permanent: 21%

Patient parameters

  • Age
  • Gender
  • Prior history of VTE (documented in medical history at time of filter placement)
  • Presence of neurological disease (defined as stroke, paraplegia, quadriplegia, Parkinson.s disease, and Alzheimer.s disease)
  • Presence of malignancy

Indication for filter placement parameter was subdivided into five categories

  • VTE with anticoagulation (AC) contraindication
  • VTE with AC complication
  • VTE with AC failure (prolonged post operative immobilization, morbid obesity, family history of thrombophilia, current hormonal therapy, significant medical comorbidities i.e., COPD, cardiac ischemia, etc)
  • High risk VTE
  • Prophylaxis

Patients were assigned one, and only one, category for placement indication.

IVC Filter Clinic | Northwestern Medicine