Incomplete caval protection following suprarenal caval filter placement--a case report

Area of Science:

• Vascular surgery
• Medical device engineering
• Thrombosis management

Background:

• Inferior vena cava (IVC) filters are crucial for preventing pulmonary emboli from lower extremity or pelvic thromboses.
• Suprarenal IVC filter placement is indicated in specific clinical scenarios.
• The Greenfield filter is commonly used, with limited described differences between its stainless steel and titanium variants.

Observation:

• A case report details incomplete caval protection despite successful placement of a stainless steel Greenfield filter in the suprarenal IVC.
• This observation raises questions about the functional equivalence of different Greenfield filter materials.

Findings:

• Subtle, yet potentially significant, physiological differences may exist between the stainless steel and titanium Greenfield filters.
• These differences could influence the filter's performance, particularly in the suprarenal IVC position.

Implications:

• Consideration of material-specific differences is warranted for suprarenal Greenfield filter selection.
• Further research comparing the efficacy and safety of stainless steel versus titanium Greenfield filters in the suprarenal position is justified.