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Regaining orientation during an endoscopic procedure is critical. We investigated how endoscopists maintain orientation based on video and eye gaze analysis. Novices and experts performed a simulated colonoscopy procedure. Task performance was assessed by completion time, total distance traveled, maximum depth of insertion, percentage of mucosa viewed, and air insufflation volume. Procedure videos were analyzed by transfers among three viewing areas: center of bowel lumen, edge of bowel lumen, and other structure without bowel lumen in sight. Performers' gaze features were also examined over these viewing areas. Experts required less time to complete the procedure (P < 0.001). Novices' scope traveled a greater distance (P < 0.001) and more scope was inserted compared to an expert (P < 0.001). Novices also insufflated more air than experts (P < 0.001). Experts maintained the view of bowel lumen in the middle of the screen, while novices often left it on the edge (P = 0.032). When disorientation happened, novices brought the view to the edge more frequently than the center. However, experts were able to bring it back to the center directly. Eye tracking showed that the rate of saccades in experts increased when the bowel lumen moved away from the central view, such a behavior was not observed in novices. Maintaining a centered view of the bowel lumen is a strategy used by expert endoscopists. Video and eye tracking analysis revealed a key difference in eye gaze behavior when regaining orientation between novice and experienced endoscopists.
This article was published in the following journal.
Name: Journal of robotic surgery
Colonoscopy is the gold standard for adenoma detection. All endoscopists who perform colonoscopy must by mandate be skilled to perform polypectomy. However, there are significant differences between e...
Colorectal cancer (CRC) screening is capable of reducing CRC-related morbidity and mortality. Colonoscopy is the reference standard to detect CRC, also providing the opportunity to detect and resect i...
Eye-gaze metrics derived from areas of interest (AOIs) have been suggested to be effective for surgical skill assessment. However, prior research is mostly based on static images and simulated tasks t...
Adenoma detection is a highly personalized task that differs markedly between endoscopists. Technical advances are therefore desirable for the improvement of the adenoma detection rate (ADR). An autom...
Application of artificial intelligence in medicine is now attracting substantial attention. In the field of gastrointestinal endoscopy, computer-aided diagnosis for colonoscopy is the most investigate...
The purpose of this study is to evaluate a handheld Colonoscopy Force Monitor(CFM™), a push-pull force and torque measuring device, that grips the shaft of the colonoscope and wirelessly...
The study purpose is to assess the accuracy of experienced endoscopists at a community hospital in predicting histological types of polyps resected at colonoscopy using white light. Patien...
This project aims to measure the impact of a physician report card (also called an audit & feedback report) on colonoscopy performance. Endoscopists in Ontario will be randomly assigned to...
The Italian Society of Digestive Endoscopy (SIED) and the Italian Association of Gastroenterologists and Hospital Digestive Endoscopists (AIGO) want to develop an effective training progra...
Rationale: Diminutive colorectal polyps (1-5mm in size) have a high prevalence and very low risk of harbouring cancer. Current practice is to send all these polyps for histopathological as...
Misalignment of the visual axes of the eyes. In comitant strabismus the degree of ocular misalignment does not vary with the direction of gaze. In noncomitant strabismus the degree of misalignment varies depending on direction of gaze or which eye is fixating on the target. (Miller, Walsh & Hoyt's Clinical Neuro-Ophthalmology, 4th ed, p641)
Endoscopic examination, therapy or surgery of the luminal surface of the colon.
Agents that are used to evacuate the bowels to eliminate ingested NOXAE or to prepare for COLONOSCOPY.
A change in cardiovascular function resulting in a reduction in BLOOD VOLUME, and reflex DIURESIS. It occurs frequently after actual or simulated WEIGHTLESSNESS.
A form of ocular misalignment characterized by an excessive convergence of the visual axes, resulting in a "cross-eye" appearance. An example of this condition occurs when paralysis of the lateral rectus muscle causes an abnormal inward deviation of one eye on attempted gaze.