Utility of Motorized Spiral Enteroscopy for Suspected Small Bowel Pathology (MSESB)

Prospective Evaluation of the Utility of Motorized Spiral Enteroscopy in Patients With Suspected Small Bowel Pathology

Diagnosis and treatment of small bowel pathologies remain challenging due to the long length of the small bowel. Obscure gastrointestinal (GI) bleeding with negative upper and lower GI workup, suspected inflammatory bowel disease, and suspected tumors of the small bowel often require small bowel investigation.

While video capsule endoscopy (VCE) and computed tomography (CT) enteroclysis (CTE) are often the initial diagnostic modalities for suspected small bowel pathologies and can provide structural information of the small bowel mucosa, biopsy or therapy for the detected pathology could not be performed with VCE or CTE. In patients who require biopsy or therapy of the detected small bowel pathology, deep enteroscopy would be the procedure of choice in modern clinical practice before subjecting patient to surgery.

Diagnostic and therapeutic deep enteroscopy can be performed by balloon overtube assisted enteroscopy (eg, double balloon enteroscopy (DBE), single balloon enteroscopy (SBE) or spiral overtube assisted enteroscopy (SE). Despite the difference in equipment design of DBE, SBE, and SE, the concepts for small bowel intubation by pleating the intestine over the endoscope are the same behind these techniques. Depending on the location of the small bowel pathology reported by VCE or CTE, antegrade (oral route), retrograde (anal route), or combined antegrade and retrograde deep enteroscopy for total enteroscopy can be performed.

Study Overview

• Status: Recruiting
• Conditions: Small Bowel Disease
• Intervention / Treatment: Procedure: Motorized spiral enteroscopy (MSE)

Detailed Description

Diagnosis and treatment of small bowel pathologies remain challenging due to the long length of the small bowel. Obscure gastrointestinal (GI) bleeding with negative upper and lower GI workup, suspected inflammatory bowel disease, and suspected tumors of the small bowel often require investigations of the small bowel.

While video capsule endoscopy (VCE) and computed tomography (CT) enteroclysis (CTE) are often the initial diagnostic modalities for suspected small bowel pathologies and can provide structural information of the small bowel mucosa, biopsy or therapy for the detected pathology could not be performed with VCE or CTE. In patients who require biopsy or therapy of the detected small bowel pathology between the ligament of Treitz and ileocecal valve, deep enteroscopy would be the procedure of choice in modern clinical practice before subjecting patient to surgery.

Diagnostic and therapeutic deep enteroscopy can be performed by balloon overtube assisted enteroscopy (eg, double balloon enteroscopy (DBE), single balloon enteroscopy (SBE) or spiral overtube assisted enteroscopy (SE)). Despite the difference in equipment design of DBE, SBE, and SE, the concept for small bowel intubation by pleating the intestine over the endoscope is the same behind these techniques. Depending on the location of the small bowel pathology reported by VCE or CTE, antegrade (oral route), retrograde (anal route), or combined antegrade and retrograde deep enteroscopy for total enteroscopy can be performed. In patients with suitable anatomy, total enteroscopy by antegrade approach alone may be achieved.

DBE was introduced in 2001 and has been the most studied form of modern deep enteroscopy. In a recent systematic review of 12823 procedures, the overall diagnostic yield was found to be 68.1%. The pooled total enteroscopy rate was 44% by the combined anterograde and retrograde approach or antegrade-only approach. The pooled minor and major adverse event (eg, perforation, bleeding, pancreatitis, aspiration pneumonia) rates were 9.1% and 0.72%, respectively. Despite its clinical utility, long procedure time (usually more than 1 to 1.5 hour) and the need for 2-operators are often regarded as drawbacks of DBE. SE was subsequently designed to address this issue with the use of a spiral overtube by manual rotation for efficient small bowel intubation. When compared to balloon overtube assisted enteroscopy, the main advantage of SE is the relative reduction in procedure time. However, the total enteroscopy rate of SE is lower, mainly due to difficult overtube and endoscope passage in retrograde procedures. Adverse events with SE (eg, minor mucosal tears, perforation, etc) have been reported to be 0.3%. Because both DBE and SE have its own shortcomings, the need to further improve the current technology of deep enteroscopy has always been present.

Recently, a motorized spiral enteroscope (MSE) (Olympus Medical, Tokyo, Japan) has become available and has the potential to address the shortcomings of the DBE and SE. MSE is an enteroscope equipped with a short spiral overtube propelled by a endoscopist-controlled motor contained in the handle of the endoscope. The endoscopist controls the left-right and up-down movements by the usual manuvers while the forward or backward advancement of the enteroscope would be contolled by a foot pedal that activates the spiral overtube rotation. The basic principle of small bowel pleating over the endoscope by the use of an overtube to achieve deep small bowel intubation is similar to that of DBE and SE. During the procedure, a visual force gauge allows the operator to monitor the direction of overtube rotation and the resistance applied to the spiral overtube in the small bowel. If excessive rotational resistance is detected, the motor would be stopped automatically to avoid mucosal trauma in the intestine. The initial experience of MSE in patients with small bowel pathology and colonic pathology appears promising with a diagnostic yield of 76 - 88%, therapeutic yield of 76%, a total enteroscopy rate of 70% (combined antegrade and retrograde approaches or antegrade alone approach) and shorter procedure time (< 40 minutes). Based on data from three studies including a total of 110 MSE procedures, no serious adverse event such as perforation has been reported. The overall adverse event rate including erosion, mucosal tear, hematoma, transient swallowing discomfort, etc, was reported to be 20% in a study with 30 patients. Despite its potential to improve the clinical management of patients with small bowel disorders, current data on the diagnostic and therapeutic utility of MSE is from expert European centers and remains limited. Investigators therefore propose this study to evaluate the utility of the MSE in patients with suspected small bowel pathology.

• Study Type: Observational
• Enrollment (Anticipated): 100

Contacts and Locations

Study Locations

• Hong Kong
  • New Territories
    • Sha Tin, New Territories, Hong Kong
      • Recruiting
      • Prince of Wales Hospital, The Chinese University of Hong Kong

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

Consecutive patients with suspected small bowel pathology indicated for deep enteroscopy for diagnostic +/- therapeutic procedure.

Description

Inclusion Criteria:

• Age ≥ 18 years
• Patients with suspected small bowel pathology based on clinical presentation, small bowel imaging or capsule endoscopy indicated for diagnostic and/or therapeutic enteroscopy
• Written informed consent available

Exclusion Criteria:

• Contraindications for endoscopy due to comorbidities
• Unable to provide written informed consent
• Patients with known severe GI tract inflammation, intestinal obstruction, gastroesophageal varices that preclude a safe enteroscopy procedure
• Coagulopathy or thrombocytopenia that cannot be corrected by blood product transfusion
• Pregnant patients
• Moribund patients from terminal illnesses

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

Intervention / Treatment

Study group; Study group includes consecutive patients with suspected small bowel pathology based on clinical presentation, small bowel imaging or capsule endoscopy indicated for diagnostic and/or therapeutic enteroscopy. Patients fulfilling the inclusion criteria and without exclusion criteria would undergo MSE per study protocol.

Procedure: Motorized spiral enteroscopy (MSE); Endoscopic Procedures MSE is a 1.6m enteroscope equipped with a single-use short spiral overtube propelled by a user-controlled motor contained in the handle of the endoscope. The endoscopist controls the left-right and up-down movements by the usual manuvers while the forward or backward advancement of the enteroscope would be contolled by a foot pedal that activates the spiral overtube rotation. Antegrade MSE, retrograde MSE, or combined antegrade and retrograde MSE would be performed as clinically indicated for diagnostic +/- therapeutic procedures.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Diagnostic yield	Diagnostic yield: defined as successful identification of the suspected pathology based on clinical presentation, pre-MSE small bowel imaging or capsule endoscopy	peri-procedure

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Technical success	- defined as successful advancement of enteroscope beyond the ligament of Treitz for antegrade procedures, or successful advancement of enteroscope proximal to the ileocecal valve for retrograde procedures	peri-procedure
Therapeutic yield	Therapeutic yield: defined as successful endoscopic interventions such as treatment for GI bleeding, polypectomy, etc	peri-procedure
Insertion time	Insertion time: defined as time to the maximal depth of insertion in small bowel	peri-procedure
Maximal depth of insertion in small bowel	Maximal depth of insertion in small bowel	peri-procedure
Rate of total enteroscopy	Rate of total enteroscopy achieved by antegrade approach alone or combined antegrade and retrograde approaches if total enteroscopy is indicated by findings on pre-MSE small bowel imaging or capsule endoscopy	peri-procedure
Adverse events related to procedure	Adverse events related to procedure	peri-procedure

Collaborators and Investigators

• Sponsor: Chinese University of Hong Kong

Study record dates

Study Major Dates

• Study Start (Actual): October 22, 2019
• Primary Completion (Anticipated): December 31, 2024
• Study Completion (Anticipated): June 30, 2025

Study Registration Dates

• First Submitted: November 2, 2019
• First Submitted That Met QC Criteria: November 2, 2019
• First Posted (Actual): November 5, 2019

Study Record Updates

• Last Update Posted (Actual): April 18, 2023
• Last Update Submitted That Met QC Criteria: April 14, 2023
• Last Verified: April 1, 2023

More Information

Terms related to this study

• Keywords: enteroscopy
• Additional Relevant MeSH Terms: Digestive System Diseases; Gastrointestinal Diseases; Intestinal Diseases
• Other Study ID Numbers: MSE SB study

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No