Skip to content

Effect of Miralax NPO Time on Residual Gastric Volumes and Bowel Preparation

Effect of Miralax NPO Time on Residual Gastric Volumes and Bowel Preparation

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07616908
Enrollment
200
Registered
2026-06-01
Start date
2026-07-01
Completion date
2028-06-01
Last updated
2026-07-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Polyethylene Glycol, Residual Gastric Contents

Keywords

residual gastric volume, miralax, polythylene glycol, gastric POCUS, pediatric, EGD, colonoscopy

Brief summary

The goal of this clinical trial is to assess differences in residual gastric volumes after stopping Miralax ingestion at different time points (2, 4, 6 hours) prior to anesthesia induction and compare it to the control (current institutional standard of care where no Miralax is given on the day of surgery).

Interventions

BEHAVIORALStopping Miralax ingestion 4 hours prior to anesthesia induction

Stopping Miralax ingestion 4 hours prior to anesthesia induction

BEHAVIORALStopping Miralax ingestion 6 hours prior to anesthesia induction

Stopping Miralax ingestion 6 hours prior to anesthesia induction

BEHAVIORALStopping Miralax ingestion 2 hours prior to anesthesia induction

Stopping Miralax ingestion 2 hours prior to anesthesia induction

BEHAVIORALControl

Miralax will not be given on the day of surgery

Sponsors

Stanford University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Caregiver, Outcomes Assessor)

Masking description

The endoscopist, the anesthesiologist performing the gastric POCUS evaluation, the anesthesiologist, the research coordinator

Eligibility

Sex/Gender
ALL
Age
No minimum to 18 Years
Healthy volunteers
No

Inclusion criteria

* Patients undergoing both EGD and colonoscopy * Use of Miralax for cleanout * Patients \<19 years old

Exclusion criteria

* Patients with a history of delayed gastric emptying (eg diabetic, GLP-1 intake) * Patients with a history of gastric sleeve surgery * Use of Golytely for cleanout * Emergent EGD/colonoscopies * EGD/colonoscopies for foreign body removal and/or decompression * Known neurologic compromise * Presence of pre-existing ostomy, short bowel syndrome, gastric retention, intestinal obstruction, ileus, bowel perforation, toxic colitis, toxic megacolon, swallowing difficulties * Pre-existing electrolyte derangements * Allergy to Miralax

Design outcomes

Primary

MeasureTime frame
Residual gastric volume as measured by EGDTo be performed at the start of the EGD immediately after anesthesia induction.

Secondary

MeasureTime frameDescription
Preoperative gastric POCUS volume assessmentPerformed prior to anesthesia induction
Effectiveness of colonoscopy cleanoutPerformed during the colonoscopy portion following upper GI endoscopy (EGD)The effectiveness of colonoscopy cleanout will be assessed by the Boston Bowel Preparation Scale (BBPS).
Incidence of aspiration on induction and perioperative aspirationOn anesthesia induction

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 7, 2026