Esophageal length in children: Reference data and a novel predictive equation

Area of Science:

• Pediatric Gastroenterology
• Medical Measurement
• Clinical Anatomy

Background:

• Limited data exists on pediatric esophageal length (EL), specifically the distance from the cricopharyngeus to the esophagogastric junction (EGJ).
• Accurate EL is crucial for various pediatric clinical procedures.

Purpose of the Study:

• To investigate the relationship between esophageal length (EL) and child's age, height, and weight.
• To derive predictive equations for estimating EL in children.

Main Methods:

• Prospective audit of children undergoing upper gastrointestinal endoscopy.
• Exclusion of children with esophageal anatomical disorders.
• Derivation and validation of predictive equations for EL using endoscopic measurements.

Main Results:

• Esophageal length (EL) correlated best with height (r=0.92).
• An optimal predictive equation for EL was derived: 0.156 × height (cm) - 1.336 (adjusted R²=0.841), with 76% success in validation.
• An equation for incisor to EGJ distance was also developed: 0.199 × height (cm) + 6.470 (adjusted R²=0.889), with 69% success.

Conclusions:

• This study provides the first predictive equation for estimating esophageal length in children.
• The derived equations can assist in clinical procedures like nasogastric tube and pH probe placement in pediatric patients.