What standard imaging technique is typically performed before executing a paracentesis?

Abdominal ultrasound is the standard imaging technique typically performed before executing a paracentesis because it provides real-time visualization of the abdominal cavity. This ultrasound allows the clinician to assess the amount of fluid present, identify the optimal puncture site, and avoid surrounding structures such as blood vessels and organs, minimizing the risk of complications. Its non-invasive nature and ability to provide immediate feedback make it ideal for guiding procedures like paracentesis, where precise location is critical for safety and efficacy.

While other imaging modalities such as CT scans, X-rays, and MRI can visualize abdominal fluid, they are not as frequently used in this context when immediate and dynamic imaging is required. CT scans and MRIs provide detailed images but can be less practical in urgent situations due to their longer acquisition times. X-rays are limited in visualizing fluid dynamics and do not offer the same level of detail for guiding procedures as ultrasound.