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Efficacy of a new image-enhancement technique for achieving hemostasis in endoscopic submucosal dissection

      Background and Aims

      Hemostasis during endoscopic submucosal dissection (ESD) can sometimes be challenging and stressful for the endoscopist. Therefore, we aimed to assess the usefulness of dual red imaging (DRI), a new image enhancement technique that uses 3 wavelengths (540, 600, and 630 nm) to visualize bleeding points and to examine the efficacy of DRI in shortening the time required to achieve hemostasis (hemostasis time) during ESD.

      Methods

      DRI and white-light imaging (WLI) were used alternately for managing 378 bleeding events in 97 patients undergoing ESD. Hemostasis time for each hemostasis event was measured. Using portable eye-tracking glasses, 4 experienced endoscopists were shown random videos of intraoperative bleeding during ESD (20 cases each on WLI and DRI) and identified the bleeding point in each video. The mean distances of eye movement per unit of time until the bleeding point were identified in each video and compared between the WLI and DRI groups.

      Results

      Average hemostasis time was significantly shorter in the DRI group. The mean distance of eye movement was significantly shorter in the DRI group than in the WLI group for all endoscopists.

      Conclusions

      DRI can offer useful images to help in clearly detecting bleeding points and in facilitating hemostasis during ESD. It is feasible and may help in successfully performing ESD that is safer and faster than WLI. (Clinical trial registration number: UMIN000018309.)

      Abbreviations:

      DRI (dual red imaging), ESD (endoscopic submucosal dissection), WLI (white-light imaging)
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      Linked Article

      • Does dual red imaging work better?
        Gastrointestinal EndoscopyVol. 93Issue 3
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          We congratulate Maehata et al1 on their study. The authors reported that dual red imaging (DRI) can facilitate hemostasis during endoscopic submucosal dissection (ESD) because of improved visualization of the bleeding point, compared with white-light imaging (WLI). Although it is a great study, we would like to share our reservations and suggestions for further research.
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