Dual-Isotope Scintigraphy for Gastrointestinal Transit in Duodenal Switch: An Explorative Clinical Study

Area of Science:

• Gastroenterology
• Bariatric Surgery
• Medical Imaging

Background:

• Biliopancreatic diversion with duodenal switch (BPD/DS) is an effective bariatric procedure.
• Gastrointestinal side effects can occur due to reduced gastric volume and nutrient absorption.
• Understanding transit times is crucial for managing post-surgical symptoms.

Purpose of the Study:

• To assess gastrointestinal transit times for bile and food after BPD/DS.
• To utilize a novel dual-isotope scintigraphy technique for this assessment.
• To explore correlations between transit times and patient-reported gastrointestinal symptoms.

Main Methods:

• An explorative single-center study involving 10 patients post-BPD/DS.
• Dual-isotope scintigraphy using 99mTc-labeled bile acid analogue and 111In-DTPA-labeled omelet.
• Gastrointestinal symptom assessment via the Fecal Incontinence Quality of Life (FIQL) questionnaire.

Main Results:

• Gastric emptying half-time was 40 minutes.
• Median transit time to enteroenterostomy: 70 min for food, 105 min for bile.
• No statistically significant association found between stool frequency and transit times, despite observed differences.

Conclusions:

• Dual-isotope scintigraphy effectively assesses gastric and small bowel transit post-BPD/DS.
• Transit times exhibit variability among patients.
• This imaging technique provides valuable data for patients experiencing severe gastrointestinal symptoms.