1. Limb asymmetry in titanium Greenfield filters: Clinically significant?
Lazar J. Greenfield, MD, Mary C. Proctor, MS, Kyung J. Cho, MD, Thomas W. Wakefield, MD 
Journal of Vascular Surgery 
Volume 26, Issue 5, Pages (November 1997)
DOI: /S (97)
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2. Fig. 1
Titanium Greenfield filter with the modified hook introduced in 1989 for percutaneous placement (Boston Scientific Co., Watertown, Mass.).
Journal of Vascular Surgery  , DOI: ( /S (97) )
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

3. Fig. 2
Indications for filter placement have changed during the past 3 years, with a greater number being placed for prophylaxis. This indication is used most often in trauma patients.
Journal of Vascular Surgery  , DOI: ( /S (97) )
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

4. Fig. 3
Schematic presentation of four potential patterns of asymmetry based on the number of legs on each side of the cava.
Journal of Vascular Surgery  , DOI: ( /S (97) )
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

5. Fig. 4
Cavagram of a patient with a severely distorted filter, probably associated with compression of the cava as a result of a retroperitoneal hematoma. A recurrent PE developed in this patient 1 month later.
Journal of Vascular Surgery  , DOI: ( /S (97) )
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

6. Fig. 5
Clinical presentation of the 4-2 (A) and 5-1 (B) distributions as noted on follow-up radiographs. These are the most frequently noted patterns of distortion.
Journal of Vascular Surgery  , DOI: ( /S (97) )
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

7. Fig. 5
Clinical presentation of the 4-2 (A) and 5-1 (B) distributions as noted on follow-up radiographs. These are the most frequently noted patterns of distortion.
Journal of Vascular Surgery  , DOI: ( /S (97) )
Copyright © 1997 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions