EDITORS‘ NOTE: This column is an educational project of theJournal of Enterostomal Therapy. Content is neither reviewed nor approved by the IAET Certification Board. The intention of the editors is to provide a review of content. Readers will be referred to additional sources for more detailed information. Each column will designate the section of the certification examination to which it applies on the basis of the content covered. Your suggestions for future columns will be carefully reviewed.