Evaluation of Dutch General Practitioners ultrasound referrals and opportunities for point-of-care ultrasound: A retrospective analysis

BACKGROUND: General practitioners (GPs) frequently refer patients for abdominal ultrasound. Depending on the clinical context, a 'triage ultrasound' can assess multiple potential causes of abdominal symptoms, while a 'targeted ultrasound' (point-of-care ultrasound, POCUS) focuses on specific indications (e.g. cholelithiasis). OBJECTIVE: To assess whether medical questions posed by GPs in abdominal ultrasound referral letters are adequate for radiologists to perform their examination, and to identify indications for POCUS by GPs based on exclusion rates and alternative findings in radiological reports. METHODS: Retrospective study analysing GP referral letters with corresponding radiology reports referred for abdominal ultrasound. Key variables: GP's medical question, indication type and the radiologist's final interpretation, following established diagnostic guidelines. RESULTS: A total of 1,196 referral letters with corresponding reports were reviewed. Of these, 143 (12%) were excluded, primarily due to missing clinical information from the GP (102; 8.5%). The final sample comprised 1053 referral letters with reports (mean age 59.2 years; 60% female). Sixteen percent of referral letters lacked a medical question, and 33% included exclusively guideline-based indications. The most common guideline-based indications were urolithiasis (43%) and cholelithiasis (39%). For guideline-based requests, radiologists excluded the indicated condition in 75% of cases, and an alternative diagnosis was identified in fewer than 10%. CONCLUSION: GPs frequently provide insufficient clinically relevant information in abdominal ultrasound referral letters. Simple cases with well-defined clinical queries like cholelithiasis, urolithiasis, hydronephrosis and abdominal aortic aneurysm seem suitable for POCUS evaluation, as these are often excluded conditions for which the risk of overlooking serious diagnoses is low.