The Influence of Probe Pressure on Appendix Visualization in Pediatric Sonography: A Pilot Study

Area of Science:

• Pediatric Radiology
• Medical Ultrasound
• Diagnostic Imaging

Background:

• The appendix is often difficult to visualize sonographically.
• Understanding factors influencing appendix visualization is crucial for accurate diagnosis.

Purpose of the Study:

• To evaluate the impact of ultrasound probe pressure on appendix visualization in pediatric patients.
• To determine the relationship between applied pressure, skin thickness, and appendix displacement during sonography.

Main Methods:

• A standardized ultrasound imaging protocol was used in pediatric outpatients.
• Probe pressure was measured using a force sensor during appendix visualization.
• Skin thickness and appendiceal movement were recorded.

Main Results:

• The appendix was visualized in all 46 analyzed scans.
• Mean pressure for identification was lower than for displacement out of view.
• Neither pressure nor skin thickness showed a significant correlation with appendix movement.

Conclusions:

• While not statistically significant, lower pressures facilitated appendix identification.
• Excessive ultrasound probe pressure may displace the appendix, leading to non-visualization.
• Optimizing probe pressure is important for successful appendix sonography.