1. Figure 6 Assessment of colonic transit time with radiopaque markers
Figure 6| Assessment of colonic transit time with radiopaque markers. A radiopaque marker test of a patient who ingested 10 markers every morning for 6 days is shown. The plain abdominal radiograph was taken on day 7 and shows that all 60 markers are retained; accordingly, colonic transit time is ≥144 h ((number of retained capsules × 24 h)/(number of capsules ingested per day)). Normal values include colonic transit times ≤70 h in a mixed population, ≤50 h in men and ≤70–106 h in women. Note that in this case, the markers are evenly distributed throughout the colon, which is regarded as typical of, but is not completely specific for, slow-transit constipation.
Keller, J. et al. (2018) Advances in the diagnosis and classification of gastric and intestinal motility disorders
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