Contrast-induced nephropathy in urological imaging: A comparison with cardiology interventions

Area of Science:

• Nephrology
• Radiology
• Cardiology

Background:

• Published research on contrast-induced nephropathy (CIN) primarily addresses cardiac interventions, with limited focus on urological contrast studies.
• Intravenous (IV) iodinated contrast material use in medical imaging necessitates understanding its association with CIN.
• This study investigates CIN incidence in urology patients undergoing contrast investigations, comparing it with cardiology interventions.

Purpose of the Study:

• To determine the association and effect of IV iodinated contrast material on CIN incidence in urology patients.
• To compare CIN incidence and associated risk factors between urology and cardiology contrast investigations.

Main Methods:

• Prospective study of 339 patients (168 urology, 171 cardiology) undergoing IV contrast studies over one year.
• Analysis of risk factors including age, sex, diabetes, hypertension, anemia, left ventricular ejection fraction, estimated glomerular filtration rate (eGFR), and contrast volume.
• Statistical analysis using Chi-square, Fisher exact, and Student's t-tests.

Main Results:

• CIN incidence was 8.3% in urology patients versus 29.8% in cardiology patients.
• In urology patients, CIN was significantly associated with eGFR <60 ml/min/1.73 m² and contrast volume.
• In cardiology patients, CIN was significantly associated with diabetes, hypertension, eGFR <60 ml/min/1.73 m², and contrast volume.

Conclusions:

• The incidence and impact of contrast-induced nephropathy are lower in urological procedures compared to cardiology interventions.
• Patient factors associated with CIN occurrence differ between urological and cardiological contrast study groups.