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.
