Ability of naloxone to enhance the colonoscopic appearance of normal colon vasculature and colon vascular ectasias

Lawrence J. Brandt, M. K. Spinnell

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Background: Colon vascular ectasias are a common cause of lower intestinal bleeding among the elderly. The lesions may be difficult to diagnose at colonoscopy because they are small and their appearance may be influenced by the patient's blood pressure, blood volume, and narcotic sedation during the procedure. The purpose of this study was to determine whether naloxone influenced the appearance of colon vascular ectasias at colonoscopy. Methods: One hundred forty-four patients older than 60 years undergoing complete colonoscopy participated in the study. Medications were given in the usual doses. After a 2-minute inspection of the cecum and ascending colon, naloxone was given, followed by another 2-minute observation period. Photographic documentation of areas of interest was obtained before and after administration of naloxone. Results: One hundred fourteen patients (79%) had no ectasias before or after administration of naloxone. Fourteen (9.7%) initially had normal vessels, and the vessels became more prominent; 4 (2.7%) initially had no ectasias, but ectasias later developed. Four patients (2.7%) had ectasias before administration of naloxone that did not change; 8 (5.4%) had ectasias before administration of naloxone that increased in size (3 patients), number (7 patients), or both (2 patients). Conclusions: Naloxone can enhance the appearance of normal colonic vasculature and ectasias. Naloxone is an important adjunctive medication for patients undergoing examinations for lower intestinal bleeding.

Original languageEnglish (US)
Pages (from-to)79-83
Number of pages5
JournalGastrointestinal Endoscopy
Volume49
Issue number1
DOIs
StatePublished - 1999

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Pathologic Dilatations
Naloxone
Blood Vessels
Colon
Colonoscopy
Hemorrhage
Ascending Colon
Cecum
Narcotics
Blood Volume
Documentation
Observation
Blood Pressure

ASJC Scopus subject areas

  • Gastroenterology

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Ability of naloxone to enhance the colonoscopic appearance of normal colon vasculature and colon vascular ectasias. / Brandt, Lawrence J.; Spinnell, M. K.

In: Gastrointestinal Endoscopy, Vol. 49, No. 1, 1999, p. 79-83.

Research output: Contribution to journalArticle

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