requires colon preparation, colon capsule endoscopy does not require insufflation or sedation, and the risks associated with the procedure are minimal [25,27]. Currently on its second-generation, this colon capsule (PillCam® COLON 2, PCC-2) measures 11.6 mm × 31.5 mm and it has one camera at each end, with an angle of view of 172°, allowing for nearly 360° coverage of the colon. PCC-2 captures 4 images per second during the first 3 minutes following activation, and then works at a low rate of 14 images per minute until small bowel images are detected [22]. The capsule then turns into an adaptive frame rate mode, capturing from 4 frames per second when stationary, up to 35 frames per second when in motion [22]. With this technology, the risk of missing lesions while the capsule is moving is reduced, which may be particularly relevant during its rapid passage through the transverse colon, at the same time saving battery energy and optimizing the video length. It is also possible to get the adaptive frame rate mode activated from the beginning of the examination, even before capsule ingestion, in order to improve imaging of the upper GI tract. The data recorder (DR3) assists the medical staff and the patient through the procedure according to a pre-selected preparation protocol, by alerting and displaying on the screen a sequence of instructions, paving the way for PCC-2 to be offered as an out-of-clinic procedure [28]. Figure 1 summarizes the current protocol in our unit. With the DR3 we can use real-time viewing to selectively administer a prokinetic drug to patients with delayed gastric emptying [29]. If the capsule is still remaining in the gastric cavity one hour after ingestion, DR3 will instruct the patient to get a prokinetic such as oral domperidone. DR3 is also able to automatically detect when the capsule starts capturing images of the small bowel, with an estimated sensitivity of 98.3% sensitivity [28], subsequently activating the adaptive frame rate which will capture up to 35 frames per second, and it also alerts the patient to ingest the first booster laxative (sodium phosphate, NaP), which will accelerate small bowel transit time of the capsule and help to maintain the colon cleanliness. DR3 will also notify the patient to have a second booster of NaP, and finally a bisacodyl suppository if the capsule has not been excreted
Pan-endoscopy in Crohn's DiseaseThe availability of PCC-2 triggered a new concept, based on the possibility to perform a complete examination of the whole GI tract from mouth to anus (pan-endoscopy) with a single non-invasive procedure [37]. Although the exploration of the esophagus and stomach rests sub-optimal with the currently available capsule models, the feasibility of remotely controlled prototypes has been demonstrated, making it expectable to have such limitations overcome in a near future [38][39][40][41][42][43]. Although there are currently no specific recommendations to routinely perform upper GI endoscopy in adult CD patients, it may contribute to establish the dia...