Abstract 2421: Abdominal Aortic Aneurysm Screening Using a Hand-Held Ultrasound Volume Scanner: A Pilot Study
Background: Screening for abdominal aortic aneurysms (AAA) is cost-effective and timely repair improves outcome. Using standard ultrasound (US) equipment an AAA can be accurately diagnosed or ruled-out. However, this requires training and bulk equipment.
Aim: To evaluate the diagnostic potential of a new hand-held ultrasound bladder volume indicator (BVI) in the setting of AAA screening.
Methods: In total, 119 patients (66 ± 14 years, 88 men) referred for atherosclerotic diasease were screened for the presence of AAA (diameter > 30 mm using US). All patients underwent two examinations, US and BVI, at random order. Using the BVI, aortic volume was measured at 6 pre-defined points. Maximal diameters (US) and volumes (BVI) were used for analyses. In patients with an abnormal US result a CT scan was performed.
Results: In 67 (57%) patients an AAA was diagnosed using US. The aortic diameter by US correlated closely with aortic volume by BVI (r=0.88, p<0.0001). Using a cutoff value of ≥50 ml for the presence of AAA by BVI, sensitivity, specificity, positive and negative predictive value of BVI in detection of AAA were 96%, 87%, 90% and 94%, respectively. The agreement between the two methods was 92%, kappa 0.83. The agreement between CT scan and BVI was 88%, kappa 0.60.
Conclusion: The bladder scan volume indicator is a promising tool in screening patients for AAA.