Bedside ultrasound can be helpful in ruling in the diagnosis
EDUS in adults has a Sn of 0.68 and Sp of 0.98
EDUS in pediatric has a Sn of 0.85 and Sp of 0.93
Classically symptoms include periumbilical pain traveling to the RLQ pain, followed by nausea, anorexia, and vomiting

Use linear probe (curvilinear in more obese patients)
Scan RLQ from ASIS to right iliac artery to identify a tubular structure
Scanning over the point of maximal tenderness can be helpful
The appendix typically appears anterior to the psoas muscle and iliac vessels
Once identified, evaluate if the tube is compressible in the transverse view
Scanning over the point of maximal tenderness can be helpful
Accepted criteria for diagnosis includes:
Noncompressible
Blind-ending tubular structure in the longitudinal axis
Measures >6 mm in diameter from outer wall to outer wall
Lacks peristalsis
Other attributes can add to identification:
Target-like appearance in the transverse axis<unk> al free fluid
Wall edema
Identification of fecalith
Noncompressible
Blind-ending tubular structure in the longitudinal axis
Measures >6 mm in diameter from outer wall to outer wall
Lacks peristalsis
Target-like appearance in the transverse axis<unk> al free fluid
Wall edema
Identification of fecalith
Ultrasound: Abdomen
Ultrasound: Pelvic
Ultrasound: Probe orientation
Ultrasound: Lungs
Ultrasound: Pharyngeal
Ultrasound: Signs
Acute abdominal series
Ultrasound: Tendons