Is Point-of-Care Ultrasonography Effective for the Diagnosis of Urolithiasis?

The search strategy identified 627 unique abstracts, of which 26 were selected for full-text review. Nine studies were determined to meet the inclusion criteria (3 addressing accuracy only, 3 addressing prognostic value only, and 3 addressing both). One large study by Smith-Bindman et al2 was excluded from diagnostic accuracy assessment because of concern about risk of bias from a weak reference standard (ie, direct stone visualization or surgical removal determined by follow-up telephone call) and a large proportion of patients lost to follow-up (14.4%).

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