Gastroenterology · Primary Care
Rome IV Opioid-Induced Constipation calculator
Enter the published formula inputs below to calculate and interpret this score.
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Opioid-induced constipation criteria not met
Band: Opioid-induced constipation criteria not met
Interpretation. Opioid-induced constipation criteria not met
Suggested management. Opioid-induced constipation needs new or worsening symptoms when opioid therapy is started, changed, or increased, plus at least 2 of the 6 constipation features. The 6-month duration rule is not required here.
Rome IV Opioid-Induced Constipation: 0 — Opioid-induced constipation criteria not met. Interpretation: Opioid-induced constipation criteria not met What to do: Opioid-induced constipation needs new or worsening symptoms when opioid therapy is started, changed, or increased, plus at least 2 of the 6 constipation features. The 6-month duration rule is not required here. Inputs: New or worsening constipation when an opioid is started, changed, or increased: false; Straining during more than 25% of defecations: false; Lumpy or hard stools (Bristol 1–2) more than 25% of the time: false; Sensation of incomplete evacuation more than 25% of the time: false; Sensation of anorectal blockage more than 25% of the time: false; Manual maneuvers to facilitate more than 25% of defecations: false; Fewer than 3 spontaneous bowel movements per week: false Source: Lacy BE et al. Bowel disorders. Gastroenterology. PMID: 27144627. New or worsening constipation symptoms when starting, changing, or increasing opioid therapy, with at least 2 of the 6 constipation features. (2016)
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Clinical inputs
- New or worsening constipation when an opioid is started, changed, or increased
- Straining during more than 25% of defecations
- Lumpy or hard stools (Bristol 1–2) more than 25% of the time
- Sensation of incomplete evacuation more than 25% of the time
- Sensation of anorectal blockage more than 25% of the time
- Manual maneuvers to facilitate more than 25% of defecations
- Fewer than 3 spontaneous bowel movements per week
Primary source
Lacy BE et al. Bowel disorders. Gastroenterology. PMID: 27144627. New or worsening constipation symptoms when starting, changing, or increasing opioid therapy, with at least 2 of the 6 constipation features. (2016)
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