CT-Guided Versus Ultrasound-Guided Drainage of Intra-Abdominal Abscesses

Image-guided drainage has become the cornerstone of managing intra-abdominal abscesses, offering a minimally invasive alternative to open surgical intervention. Computed tomography (CT) and ultrasound (US) are the two most commonly employed modalities for guiding percutaneous drainage, each with distinct technical and clinical features. CT provides superior anatomical detail, making it particularly effective for deep-seated, multiloculated, or anatomically complex abscesses. It allows precise catheter placement even in challenging locations but exposes patients to ionizing radiation and often requires transport to a CT suite, which may be unsuitable for unstable individuals. Ultrasound, in contrast, enables real-time guidance and is well suited for superficial or easily accessible collections. It is portable, lacks radiation risk, and is ideal for bedside procedures, especially in critically ill patients. However, its utility is limited by acoustic window quality and operator experience. Success rates for both modalities are generally high when used appropriately, but clinical decision-making is influenced by abscess characteristics, patient stability, and institutional resources. CT-guided drainage tends to be preferred in cases requiring complex access routes or when ultrasound visualization is inadequate. Complication rates are low for both methods, though the nature of complications varies with the guidance technique used. Factors such as abscess location, depth, adjacent structures, and urgency of intervention guide the choice of imaging modality. No single approach fits all scenarios, and decisions must be tailored to individual patient needs. Understanding the strengths and limitations of both CT and ultrasound guidance is essential for optimizing outcomes in the management of intra-abdominal abscesses. Selecting the appropriate modality requires a balance between safety, efficacy, accessibility, and procedural context, underscoring the importance of clinical judgment and multidisciplinary coordination.