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Updated: Dec 23, 2025

Hydrodynamic Renal Pelvis Injection for Non-viral Expression of Proteins in the Kidney
Published on: January 8, 2018
Urinary excretion after transcaval renal penetration of a fragmented Bird's Nest filter
Kathryn Capasso1, Nadia A Awad2, Nkosi Alvarez1
1Department of Surgery, Albert Einstein Medical Center, Philadelphia, Pa.
Abstract:
Permanent inferior vena cava (IVC) filters are used to prevent venous thromboembolic events in select populations of patients. The Bird's Nest filter (BNF; Cook Medical, Bloomington, Ind) is an IVC filter that has been associated with various complications including filter strut fractures, migration, caval wall perforation, visceral perforation, and vascular injury. We report a case of a BNF that eroded transmurally through the IVC into the right kidney parenchyma. The patient underwent operative intervention with removal of the BNF with an uncomplicated postoperative course. In patients with symptoms and local filter perforations, we advocate for safe filter removal when possible to avoid long-term damage.
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