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Clinical Trial Summary

The primary objective is to assess the need of clamping nasogastric tubes (NG) before removal. Outcomes of patients admitted requiring nasogastric tube decompression will be compared. Patients with small bowel obstruction (SBO), post-operative ileus, and ileus on admission that require nasogastric tube placement will be included in the study. The patients will be divided into two groups when return of bowel function is suspected based on set criteria for automatic removal of nasogastric tube versus nasogastric tube clamp trial.

Specific outcomes will be occurrence of nasogastric tube replacement, number of emeses if any, failure of clamp trial, aspiration pneumonia, and any other unplanned outcome.


Clinical Trial Description

A high volume of patients are admitted to hospitals yearly for bowel obstruction/ileus complications. Lifetime risk of small bowel obstruction varies from 0.1%-5% if patients have not undergone abdominal surgery, but increases to 30% if the patient underwent a prior abdominal surgery. Ileus is also a common complication in the short term post-operative period. Both of these conditions are initially treated with nasogastric tube decompression if the patient is having emesis.

The investigators were unable to find any literature that shows a concrete volume of nasogastric tube output that was deemed the maximum for safe removal. Signs of return of bowel function can indicate it is safe to remove the nasogastric tube. These include flatus, bowel movements, decrease in nasogastric tube output amount, change of nasogastric tube output color from bilious (green) to more gastric (yellow) or salivary (clear/foamy) quality. Some physicians prefer to perform a clamp trial before removal of the nasogastric tube. The duration of the trial and cutoff amount of residual drainage varies among physicians. Regardless of the duration, the nasogastric tube is essentially stenting open the lower esophageal sphincter while it is left in place and not connected to suction. This, theoretically, places the patient at risk for aspiration and subsequent pneumonia. Information in the literature appears divided in regard to aspiration risk.

This study hopefully will support the statement that it is safe to remove the nasogastric tube with signs of bowel function, without the need for clamp trials and thus avoiding any possible adverse outcomes associated with the trial. The investigators also anticipate that this study will provide objective guidelines on which patients will continue to improve after nasogastric tube removal. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04001985
Study type Interventional
Source University of Illinois College of Medicine at Peoria
Contact Robin Alley, MD
Phone 8472756187
Email ralley@peoriasurgical.com
Status Not yet recruiting
Phase N/A
Start date October 15, 2019
Completion date September 20, 2020

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