Colonic Transit Time – CTT
The Colonic Transit Time (CTT) test is a simple, painless and safe method for the investigation of cases of intestinal constipation that do not respond to the initial clinical approach, which consists basically in the correction of adverse dietary habits.
The exam is quite simple. The patient is advised to maintain a high-fiber and fluids intake and to avoid any medications that may interfere in their intestinal transit time (or the “speed” their intestine works), for at least three days before the test.
In general, the patient is then instructed to swallow a SitzMarks capsule, which contains 24 radiopaque markers that are visible throughout the digestive tract with plain radiographs.
These rings, made out of non-toxic and inert material, have a density similar to that of feces, so they tend to follow the flow of fecal waste through the colon, being evacuated along them. Thus, by performing one or more plain abdominal radiographs, it is possible to quantify how many markers were eventually retained and, mainly, their distribution through the intestinal segments.
It is the best clinical test available for the documentation of slow transit constipation. On the other hand, the pelvic concentration of the markers on the fifth day may suggest normal bowel movement and a pattern of outlet obstruction or dyschezia. These cases deserve investigation directed at the various pelvic causes of constipation.
At COLONO, your Digestive System Clinic, we have the original SitzMarks capsules. The patient receives a capsule and all the written guidelines for the exam. Finally, a detailed and illustrated report is prepared.