New parameter for quantifying bolus transit with high-resolution impedance manometry: A comparison with simultaneous...

Area of Science:

• Gastroenterology
• Medical Imaging
• Physiology

Background:

• Esophageal bolus transit is assessed via esophagogram or high-resolution impedance manometry (HRIM).
• Three-dimensional volume of inverted impedance (VII) quantifies residual esophageal bolus.
• VII requires validation against simultaneous esophagogram.

Purpose of the Study:

• To validate the novel three-dimensional volume of inverted impedance (VII) method.
• To compare VII residual bolus quantification with simultaneous barium esophagogram.
• To assess the reliability of VII in healthy volunteers and symptomatic patients.

Main Methods:

• Prospective evaluation of 9 healthy volunteers and 21 symptomatic patients using HRIM and barium esophagogram.
• Estimation of VII from HRIM data using MATLAB.
• Comparison of VII with residual bolus volume from esophagogram.

Main Results:

• Analysis of 80 swallows (24 controls, 56 patients).
• 91.3% concordance between VII and esophagogram bolus transit patterns.
• Strong correlation (Pearson's r: 0.805-0.730) and good intraclass correlation (0.901-0.705) for VII.

Conclusions:

• The three-dimensional volume of inverted impedance (VII) is a reliable method for assessing esophageal residual bolus.
• VII provides a validated, quantitative measure comparable to esophagogram.
• This method enhances the assessment of esophageal bolus transit.