Low Fiber Diet During Bowel Prep

A recent prospective, randomized trial (A Mytyk et al. JPGN 2018; 66: 720-24) compared a low fiber diet with a clear liquid diet during a polyethyylene glycol prep prior to colonoscopy. N=184, Median age 15 yrs (range 6-18 yrs).

Low fiber diet included milk, dairy products, some soups, bread and rolls, sandwiches, meat, fish, eggs, pasta, and honey.

Children in both groups were asked to fast for a minimum of 6 hours prior to colonoscopy and their bowel prep was assessed with the Boston Bowel Preparation Scale (BBPS). Bowel prep consisted of PEG 4000 with electrolytes dosed at 66 mL/kg to max of 4 liters.

Key findings:

  • There was no significant difference in BBPS between the two groups
  • Overall, 95.4% of patients had good bowel cleanness (BBPS ≥5)

My take: This study indicates that with a good volume of bowel prep, a less-rigorous diet change may be effective for a cleanout.

Disclaimer: These blog posts are for educational purposes only. Specific dosing of medications/diets (along with potential adverse effects) should be confirmed by prescribing physician/nutritionist.  This content is not a substitute for medical advice, diagnosis or treatment provided by a qualified healthcare provider. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a condition.

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