Results
Eleven out of the twelve implanted microchips were successfully identified transcutaneously via a low radio frequency scanner at occurrences as high as 100%. The most frequently identified segments of the colon were the sternal flexure, ventral band of the right ventral colon and the lateral band of the cecum.
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The microchip assigned to the cecal apex was found in the feces on day 6. The microchip assigned to the dorsal band of the left ventral colon was not able to be identified during the duration of the study, and therefore has also been assumed to have been lost due to its migration into the intestinal lumen.
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The microchip assigned to the right dorsal colon was not able to be identified transcutaneously until the horse was hanging via hobbles and a hoist post-euthanasia.
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The video depicted shows all 84 digital data sheets combined to illustrate how the large colon and cecum migrated throughout the duration of the study.
![MorrisHasselSteward-28[22695]_edited.jpg](https://static.wixstatic.com/media/fdf75e_290d2af4ba694c4fb42f5f17fcc8957b~mv2.jpg/v1/fill/w_525,h_233,al_c,q_80,usm_0.66_1.00_0.01,enc_avif,quality_auto/MorrisHasselSteward-28%5B22695%5D_edited.jpg)
The ventral band of the right ventral colon (8) was present on 100% of scans. The sternal flexure (6) and the lateral band of the cecum (10) were present on all but one scan.
The cecal apex (9) and dorsal band of the cecum (12) were more frequently identified when fasted. The pelvic flexure (1) and left dorsal colon (4) were more often identified while eating. The ventral band of the left ventral colon (2), the diaphragmatic flexure (5) and the medial band of the cecum (11) were more frequently identified post meals.
The right dorsal colon (7) was not identified transcutaneously until the horse was hung via hobbles and a hoist, post-euthanasia. The dorsal band of the left ventral colon (3) was not able to be identified transcutaneously, and was presumed to be lost via penetration into the lumen of the intestine.