Factors affecting perception of the normal pediatric appendix on sonography

Area of Science:

• Pediatric Imaging
• Diagnostic Ultrasound
• Medical Education

Background:

• Assessing factors influencing normal appendix identification in pediatric patients.
• Investigating the role of sonographer experience and scanning time.
• Retrospective review of pediatric cases with suspected appendicitis.

Purpose of the Study:

• Determine if perceptual skills, sonographer experience, knowledge, and scanning time impact normal appendix identification in children.
• Evaluate the effectiveness of sonography in ruling out appendicitis in pediatric patients.
• Identify predictors for successful visualization of the normal appendix.

Main Methods:

• Retrospective analysis of 127 pediatric patients (<18 years) with suspected appendicitis.
• Data collection included patient demographics, scanning time, and sonographer experience.
• Comparison of visualization rates between experienced sonographers and radiology residents.

Main Results:

• Experienced sonographers (median 15 years) were more successful in visualizing the normal appendix than residents (median 8 years).
• Increased scanning time (average 29.1 min vs. 20.4 min) correlated with successful visualization.
• Multivariable analysis showed increased sonographer experience and scanning time significantly increased the odds of perceiving the appendix.

Conclusions:

• Sonographic identification of the normal appendix in pediatric patients is most successful with experienced sonographers and sufficient scanning time.
• Triaging patients to sonographers with proven perceptual abilities for appendix visualization can optimize care.
• Ensuring availability of experienced sonographers, especially during off-hours, is crucial for managing 'query' appendicitis cases.