Clinical and Urgent Colonoscopy Outcomes Using the Pure-Vu® Cleansing System

Clinical and Urgent Colonoscopy Outcomes Using the Pure-Vu® Cleansing System in Hospitalized Patients With Lower Gastrointestinal Bleeding: A Single-Center Prospective Pilot Study

The Pure-Vu® System can be effectively used as a cleansing device in patients admitted with acute LGIB to the intensive care unit and the regular nurse floor (RNF) bypassing the need to administer an oral bowel preparation for adequate visualization and hence decreasing time to colonoscopy and improving diagnostic and therapeutic yield.

Study Overview

• Status: Terminated
• Conditions: Lower Gastrointestinal Bleeding; Hemostatic Disorder
• Intervention / Treatment: Device: Pure-Vu Cleansing Device

Detailed Description

Acute lower gastrointestinal bleeding (LGIB), while generally defined as gastrointestinal bleeding distal to the ligament of Treitz, can be categorized into small bowel and colorectal bleeding, two sites with distinct presentations as well as diagnostic and management options (1). Acute LGIB secondary to a colorectal source usually presents with sudden onset hematochezia with or without acute blood loss anemia and hemodynamic instability, and usually leads to multiple invasive procedures and hospitalizations. It accounts for up to one-third of all hospitalizations related to GIB (2). The current guidelines recommend urgent colonoscopy to be performed within 8 to 24 hours of presentation and after adequate colon preparation to improve visualization and diagnostic/therapeutic yield (1). While studies looking at optimal timing of colonoscopy are limited for patients with acute LGIB, a study comparing 48 patients with diverticular bleeding who underwent colonoscopy after rapid polyethylene glycol (PEG) preparation and within 12 hours of presentation with endoscopic hemostasis compared to 73 controls without endoscopic hemostasis, found a significant improvement in outcomes in the group that underwent hemostasis, including bleeding (0% vs. 53%) and hospital length (median of 2 days vs. 5 days) (3). In another RCT of 100 patients presenting with LGIB, colonoscopy within 8 hours of presentation after rapid preparation lead to a more definite diagnosis compared to patients who underwent elective colonoscopy within 96 hours of presentation (4). Urgent colonoscopy however requires the rapid administration of a large volume bowel preparation over 3-4 hours until the rectal effluent is clear (1). Purge preparation can be challenging in critically ill patients and frequently requires the placement of a nasogastric tube for administration of the preparation which could place the patient at risk of aspiration, poor tolerance, and rarely, electrolyte imbalances (1). Moreover, bleeding can subside while awaiting resuscitation and bowel preparation prior to endoscopic intervention, which could lead to a decreased diagnostic and therapeutic yield. The guidelines recommend against unprepped colonoscopy due to poor visualization and increased perforation risk (1). A pilot study looked at the effect of "hydroflush colonoscopy" in acute LGIB with minimally prepped colons (tap water enema without oral preparation). "Hydroflush colonoscopy" was defined as colonoscopy using a combination of a water jet pump irrigation and a mechanical endoscope suction device (BioVac direct suction device). Out of the 12 patients included, the cecum was reached 69% of the time and endoscopic visualization was found to be adequate to find the source of bleeding in all procedures (5). The Pure-Vu® System (MotusGI Ltd.), a novel Food and Drug Administration (FDA) 510k cleared intra-procedural cleansing device, has been recently introduced. The Pure-Vu® System integrates with the colonoscope and generates a pulsed vortex mixture of water and air in order to remove debris and is active at the time of cleansing to evacuate colonic contents simultaneously (6). Its effectiveness has been studied in colonoscopies requiring minimal preparation regimens with excellent and safe results (7,8). A multicenter European feasibility study looked at 47 patients referred for colonoscopy who received a limited bowel preparation and found significant improvement in the proportion of patients with adequate preparation, with a median Boston bowel preparation score (BBPS) increased from 3[0-5] to 9 [8-9] (8). The REDUCE trial (9), another multicenter, single-arm study, was the first trial to study Pure-Vu® in the inpatient setting, which enrolled 95 hospitalized subjects. Adequate bowel preparation improved from 38% (95% CI 28,49) to 96% (CI 90-99) in the evaluated segments. The mean BBPS improved from 1.74 in the left colon, 1.74 in the transverse colon, 1.5 in the right colon to 2.89, 2.91 and 2.86 respectively (p<0.001) (9).

• Study Type: Interventional
• Enrollment (Actual): 6
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Ohio
    • Cleveland, Ohio, United States, 44195
      • Cleveland Clinic

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 22 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Hospitalized patients in the ICU or the RNF with acute LGIB (defined as maroon-colored stool or bright red blood per rectum with suspicion of acute blood loss anemia, and hemodynamically stable and/or stabilized at the time of procedure . Hospitalized patients include:

  • Patients who develop LGIB while admitted for different reasons
  • Patients transferred from an outside hospital for further management of acute LGIB
  • Patients admitted through the emergency room for management of acute LGIB
• At least 22 years old
• Undergoing urgent colonoscopy under monitored anesthesia care or conscious sedation

Exclusion Criteria:

• Suspicion for bowel obstruction/ stricture
• Toxic megacolon or severe colitis (determined by degree of colitis on imaging and clinical condition including pain, fevers, abdominal exam, elevated inflammatory markers)
• Active Diverticulitis

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Device Feasibility
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Pure-Vu Treatment; Participants in this arm will undergo colonoscopy using the Pure-Vu cleansing device.	Device: Pure-Vu Cleansing Device; The Pure-Vu device attaches to the colonoscope and provides colonic cleansing during urgent colonoscopy without the need for a bowel preparation

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Adequate Bowel Preparation	The proportion of participants who achieve an adequate bowel preparation to identify bleeding lesions	During the colonoscopy procedure, typically less than 1 hour

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Diagnostic yield	The frequency with which investigators are able to successfully identify the source of bleeding.	During the colonoscopy procedure, typically less than 1 hour
Therapeutic Yield	The frequency with which investigators are able to successfully control bleeding through endoscopic intervention	During the colonoscopy procedure, typically less than 1 hour
Re-bleeding rate	The proportion of participants who experience recurrence of bleeding	48 hours post-colonoscopy

Collaborators and Investigators

• Sponsor: The Cleveland Clinic
• Collaborators: Motus GI Medical Technologies Ltd
• Investigators: Principal Investigator: Brian Baggott, MD, The Cleveland Clinic

Study record dates

Study Major Dates

• Study Start (Actual): March 3, 2021
• Primary Completion (Actual): April 6, 2022
• Study Completion (Actual): April 6, 2022

Study Registration Dates

• First Submitted: January 25, 2021
• First Submitted That Met QC Criteria: January 25, 2021
• First Posted (Actual): January 29, 2021

Study Record Updates

• Last Update Posted (Actual): June 23, 2023
• Last Update Submitted That Met QC Criteria: June 21, 2023
• Last Verified: June 1, 2023

More Information

Terms related to this study

• Keywords: Colonoscopy; Bowel Preparation
• Additional Relevant MeSH Terms: Digestive System Diseases; Pathologic Processes; Cardiovascular Diseases; Vascular Diseases; Hematologic Diseases; Gastrointestinal Diseases; Hemorrhagic Disorders; Hemostatic Disorders; Blood Coagulation Disorders; Hemorrhage; Gastrointestinal Hemorrhage
• Other Study ID Numbers: 20-884

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

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