New physiological method of evaluating oesophageal transit.

Area of Science:

• Gastroenterology
• Nuclear Medicine
• Diagnostic Imaging

Background:

• Oesophageal transit time assessment is crucial for diagnosing various digestive disorders.
• Existing methods may lack precision or comprehensive analysis of oesophageal function.

Purpose of the Study:

• To develop and validate a novel method for measuring oesophageal transit time in patients with oesophageal diseases.
• To assess the test's reproducibility and its ability to differentiate between normal subjects and patients with specific oesophageal conditions.

Main Methods:

• A solid bolus (10 ml poached egg white) labeled with 99mTc sodium pertechnetate was used.
• External gamma camera scanning and on-line computer analysis, including condensed image technique and activity-time curves, were employed.
• The study included 16 healthy volunteers and 32 patients with oesophageal strictures, motility disorders, or reflux oesophagitis.

Main Results:

• The test demonstrated good reproducibility with a coefficient of variation of 14% for total transit.
• Oesophageal transit slowed in an aboral direction in normal volunteers, being faster in the upper third.
• The method clearly differentiated patients with oesophageal disease from normal subjects, with delayed transit observed in reflux oesophagitis and distinct patterns in motility disorders.

Conclusions:

• The developed method provides a reliable and effective means of measuring oesophageal transit time.
• This technique is valuable for diagnosing and characterizing oesophageal diseases, particularly motility disorders and reflux oesophagitis.
• The condensed image analysis offers insights into transit patterns, aiding in the differentiation of oesophageal pathologies.