
The EnteroTracker®
A quick, minimally invasive, office-based procedure to collect mucosal samples from the upper GI tract.
What’s in the Sample?
Collected samples represent a liquid biopsy of mucosal content, which can be analyzed by reference laboratories for biomarkers corresponding to disease status.

Our easy four step process:
Secure

Swallow

Relax

Retrieve

Pediatric Willingness to Repeat EST
98% of pediatric patients surveyed would repeat the Esophageal String Test.
Ackerman SJ, et al. Am J Gastroenterol. 2019 Sep 18;114(10):1614–1625.
Why Choose EnteroTracker®
EnteroTracker® stands as a breakthrough solution, addressing the limitations of traditional invasive testing methods. With EnteroTracker®, you benefit from:
- Continuous Monitoring: Track esophageal inflammation in EoE without repetitive invasive procedures, offering precise insights into disease progression and treatment responses.
- Financial Relief: Significantly reduce healthcare costs for patients and the system, while ensuring wider accessibility in areas where endoscopy might not be available or affordable.
- Groundbreaking Innovation: Supported by twenty years of thorough research, EnteroTracker® stands as a transformative force in the healthcare realm, offering precise, minimally invasive, and economically viable solutions.
Medical Applications
Eosinophilic
Esophagitis
Samples obtained using the string test have been used to monitor eosinophilic esophagitis (EoE).

Publications
- Implementation of the esophageal string test in clinical practice and research
- Utilization and impact of esophageal string testing in children with eosinophilic esophagitis: A 1 year experience
- The Minimally Invasive 1-Hr Esophageal String Test (EST) Monitors Therapeutic Changes in Mucosal Inflammation in Eosinophilic Esophagitis
- Clinical Evaluation of the Child with Eosinophilic Esophagitis, a novel method for disease monitoring
- Minimally Invasive Approaches to Diagnose and Monitor Eosinophilic GI Diseases
- Esophageal remodeling in eosinophilic esophagitis: Relationships to luminal captured biomarkers of inflammation and periostin
- Esophageal Microbiome in Eosinophilic Esophagitis
- The oesophageal string test: a novel, minimally invasive method measures mucosal inflammation in eosinophilic oesophagitis
- One-Hour Esophageal String Test: A Nonendoscopic Minimally Invasive Test That Accurately Detects Disease Activity in Eosinophilic Esophagitis
- JAMA - Eosinophilic Esophagitis - A Review
- Noninvasive tests for eosinophilic esophagitis
Microbiome
Samples obtained using the string test have been used to evaluate the microbiome.
Publications
- Esophageal Microbiome in Eosinophilic Esophagitis
- Effect of Omeprazole on Esophageal Microbiota in Dogs Detected Using a Minimally Invasive Sampling Method
- Influence of Acid Blockade on the Aerodigestive Tract Microbiome in Children With Cystic Fibrosis
- Novel Device to Sample the Esophageal Microbiome—The Esophageal String Test

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