What medication may be administered to improve the accuracy of a Meckel scan?
Histamine H2 blockers such as cimetidine, ranitidine, and famotidine decrease acid secretion, which also reduces secretion of pertechnetate by the stomach and any ectopic gastric mucosa, thereby increasing its accumulation and improving detection.
Sequential anterior images from a 99mTc-pertechnetate (TCO4-). On initial images there is a faint focus of radiotracer in the lower midline abdomen which is static and increases in intensity over time.
This appears at the same time as is the physiologic stomach activity (partially visible in the left upper quadrant). The stomach activity subsequently passes into the duodenum at 55-minutes.
Faint physiologic is seen initially in the renal pelves and then later in the bladder.
Delayed images show a tubular configuration of the radiotracer activity in the Meckel diverticula on the anterior view (middle) and confirms its anterior location on lateral view (right).