Intraoperative duplex sonography during renal artery reconstruction.

Area of Science:

• Vascular Surgery
• Diagnostic Imaging
• Medical Technology

Background:

• Renal artery repair is crucial for preserving kidney function.
• Intraoperative assessment of repair quality is essential to prevent complications.
• Technical defects can lead to renal artery stenosis or occlusion.

Purpose of the Study:

• To evaluate the utility of intraoperative renal duplex sonography (RDS) in identifying technical defects during renal artery reconstruction.
• To correlate RDS findings with postoperative outcomes and patency rates.

Main Methods:

• A prospective study of 57 renal artery repairs in 35 patients undergoing various reconstruction techniques.
• Intraoperative RDS performed within minutes of repair completion.
• Analysis of B-scan and Doppler spectral findings, categorizing defects as major or minor.
• Postoperative follow-up including duplex sonography and angiography.

Main Results:

• RDS was successful in 98% of repairs.
• 44 repairs (77%) had normal RDS findings.
• 13 repairs (23%) showed defects; 6 major (11%) and 7 minor (12%).
• Major defects, indicated by peak systolic velocity ≥ 2.0 m/sec, led to immediate revision.
• Repairs with normal or minor RDS findings had a 98% patency rate at mean 12.4 months follow-up.
• Revisions for major defects had a lower patency rate (4/6 patent).

Conclusions:

• Intraoperative RDS is a rapid and reliable tool for assessing renal artery repairs.
• Normal or minor RDS findings correlate with excellent long-term renal artery patency.
• Major RDS defects, characterized by significant velocity increases, necessitate operative correction to improve outcomes.