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Image Acquisition Method for the Sonographic Assessment of the Inferior Vena Cava
Published on: January 13, 2023
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Classification System for Inferior Vena Cava (IVC) Appearance Following Percutaneous IVC Filter Retrieval
Ningcheng Li1, Roberto Galuppo1, Maxwell Cretcher1
1Charles T. Dotter Department of Interventional Radiology, Oregon Health and Science University, 3181 SW Sam Jackson Pk Rd, Portland, OR, 97239, USA.
Cardiovascular and Interventional Radiology
|June 23, 2022
Summary
A new grading system classifies inferior vena cava (IVC) appearance after filter removal. This system, assessing luminal narrowing and extravasation, showed high reliability in a retrospective study.
Area of Science:
- Vascular Surgery
- Interventional Radiology
- Medical Imaging
Background:
- Inferior vena cava (IVC) injuries lack a standardized classification system.
- Percutaneous IVC filter retrieval is common, but post-procedure IVC appearance is not systematically graded.
Purpose of the Study:
- To develop and validate a standardized grading system for venographic appearance of the IVC following percutaneous IVC filter retrieval.
- Establish objective criteria for describing IVC changes post-retrieval.
Main Methods:
- A two-element classification system was developed: luminal characteristics (narrowing, occlusion, avulsion) and extravasation (none, contained, free).
- The system was retrospectively applied to cavograms from 449 patients undergoing IVC filter retrieval.
- Inter-rater reliability was assessed for both grading elements and overall consensus.
Main Results:
- The system demonstrated high inter-rater reliability (overall 0.969).
- Most post-retrieval IVC appearances were Grade 1 luminal narrowing (97.3%) and Grade A (no extravasation) (96.4%).
- Higher grades of narrowing and extravasation were infrequent.
Conclusions:
- A reliable classification system for IVC appearance after filter retrieval was successfully developed.
- Retrospective validation confirmed the system's applicability and high reliability using a single-center dataset.
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