Gastric content assessment via ultrasound can provide valuable information when determining whether a patient’s stomach is full or empty, particularly in the context of preparing anesthesia for emergency surgery. Emergency surgery is common and there are no fasting guidelines for emergency surgery.
When the stomach is empty, the antrum typically presents as either a round or elliptical shape, commonly known as the “bull’s eye pattern.” This distinct pattern is characterized by a thick, hypoechogenic wall built out of muscularis propria with central and external hyperechoic layers, the mucosa, and the serosa.



Unleash the potential of POCUS with NYSORA’s POCUS App and elevate your practice, expand your capabilities, and deliver exceptional patient care. Download HERE.
Nerve Blocks App
Pain Medicine Assistant App
POCUS App
MSK Knee App
VetRA App
Nerve Block Manual
Regional Anesthesia Updates
Anesthesiology Manual
Anesthesiology Review
Anesthesia Updates 2025
Anesthesia Updates 2026
Pediatric Anesthesia Updates
Airway Management Updates
US Interventional Pain Manual
Pain Medicine Updates
Mastering Difficult IV Access
PACU Nursing Manual
RA Veterinary Manual
