Introduction

Recent evidence suggests a possible role of artificial intelligence in procedural quality measurement for endoscopic submucosal dissection by artificial intelligence¹. Precise frame by frame differentiation of operational phases may allow for a deeper understanding of the procedure and open a wide range of possibilities from automated documentation to concise training support.

Aims & Methods

In this study, we aimed to develop an algorithm for frame by frame procedural phase recognition during ESD. To this end, a dataset (27 ESDs, 2071546 single frames) was annotated for the operational supra-phases diagnostics, marking, needle injection, dissection and bleeding. Furthermore, the subphases scope manipulation, injection and application of electrical current were annotated where appropriate. A training-subset (17 ESDs, 898440 single frames) was used to train a video swin transformer with uniform frame sampling to detect the classes. The trained algorithm was evaluated internally (6 ESDs, 769523 single frames) and on a separate dataset (4 ESDs, 403583 single frames).

Results

Overall F1 Scores for internal validation and validation on the separate dataset were 83% and 90%, respectively. True positive rates for diagnostics, marking, needle-injection, dissection and bleeding were 100%, 100%, 96%, 97% and 93%, respectively. Overall F1 score over all supra-phases was 94%, overall accuracy was 93%. True positive rates for scope manipulation, injection and application of electrical current were 92%, 98% and 91%, respectively. Overall F1 score for subphases was 91%, overall accuracy was 97%.

Conclusion

The trained algorithm classified full length ESD videos on a frame by frame basis for concise surgical phases with high accuracy. Future research will focus on the development of intraprocedural quality measures, as well as automated reporting.

References

1. Cao J, Yip HC, Chen Y, et al. Intelligent surgical workflow recognition for endoscopic submucosal dissection with real-time animal study. Nat Commun 2023;14:6676.

Disclosure

All authors declare no conflict of interest concerning this study.

Introduction

Treatment response in patients with severe erosive gastroesophageal reflux disease (eGERD) is often inadequate using regular doses of proton pump inhibitors (PPIs), thus necessitating escalation of dosing. High-dose PPIs improve compliance in such patients, leading to better outcomes. However, comparative data on effectiveness of high-dose PPIs is limited.

Aims & Methods

This interim analysis assessed symptomatic improvement of regurgitation in an ongoing, prospective, real-world, observational study to compare the effectiveness of rabeprazole 40mg to pantoprazole 80mg and omeprazole 40mg/esomeprazole 80mg. Adult patients with endoscopically confirmed severe eGERD were enrolled. Patients shifted from low-dose PPIs or started on high-dose PPIs were included; those with complications of GERD were excluded.

Results

A total of 260 patients (rabeprazole, 130; omeprazole/esomeprazole, 65; pantoprazole, 65) from 37 sites in India were analyzed. Although symptomatic improvement of diurnal and nocturnal regurgitation based on patient-reported severity scores was observed among the three arms after 4±1 weeks of treatment, the complete-resolution rate of diurnal regurgitation was significantly higher with rabeprazole (17.97%) compared to omeprazole/esomeprazole (5.08%; p=0.018) and higher than pantoprazole (8.20%; p=0.077). Similarly, complete resolution of nocturnal regurgitation was significantly higher with rabeprazole (14.06%) compared to omeprazole/esomeprazole (1.59%; p=0.007) and higher than pantoprazole (7.94%; p=0.221). Among patients with associated work-related stress (n=132), one-fifth in the rabeprazole arm experienced complete resolution of diurnal regurgitation compared to none in the omeprazole/esomeprazole (p=0.013) or pantoprazole (p=0.030) arms. Patients with lack of regular physical exercise (83.08%) exhibited higher rate of complete resolution of nocturnal regurgitation with rabeprazole (13.73%) compared to the other PPIs. Overall, elderly patients >60 years of age (mean±SD, 68.82±6.54 years) treated with rabeprazole showed significantly higher complete-resolution rates of diurnal regurgitation compared to pantoprazole (36.67% vs. 0%; p=0.003). For complete resolution of nocturnal regurgitation, rabeprazole proved to be significantly better when compared to omeprazole/esomeprazole (31.25% vs. 0%; p=0.015) in elderly patients (Table 1).

Conclusion

The interim results showed that rabeprazole led to significantly higher complete-resolution rates of diurnal and nocturnal regurgitation at 4±1 weeks of treatment than omeprazole/esomeprazole in adults with severe eGERD. In elderly patients, rabeprazole showed significant resolution over pantoprazole.

Disclosure

Study funded by: Dr. Reddy's Laboratories Ltd., Hyderabad, Telangana, India

Introduction

Hypergastrinemia, caused by chronic atrophic gastritis or Helicobacter pylori (H. pylori) associated pangastritis, is associated with an increased risk of non-cardia gastric cancer. Recent studies have also found an increased risk of gastric cancer in long-term proton pump inhibitor (PPI) users. Patients with chronic atrophic gastritis also have an increased risk of neuroendocrine neoplasms (NEN) due to hypergastrinemia. However, whether long-term PPI use increases the risk of gastric NEN has not been assessed in the general population.

Aims & Methods

The aim of the present study was to assess the risk of gastric NEN among long-term PPI users in a multinational population-based study from the Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden). The study was based on the Nordic Gastric and Esophageal Tumor Study (NordGETS), which is a population-based multinational sex, age, calendar year, and country matched case-control study including all adults (≥18 years of age) with a diagnosis of gastric or esophageal tumor in the Nordic countries. In the present study, the cases were incident gastric NEN identified in the cancer registries and the exposure was long-term use of PPI categorised into three equal-sized groups (tertiles) of defined daily doses (DDDs) from the medication registries of the Nordic countries between 1996 and 2020. Multivariable logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs), adjusted for chronic atrophic gastritis, NEN in the duodenum or pancreas, and H. pylori infection identified in the patient registries and medication registries.

Results

In total, 1,790 gastric NEN case patients were compared to 17,897 control participants. After a one-year run-in period, the median follow-up was 11.8 years. The risk of incident gastric NEN increased in PPI users compared to non-users in a dose-dependent manner. The adjusted OR for incident gastric NEN was 1.83 (95% CI 1.56 to 2.15) in the highest tertile of PPI use (>385 DDDs, entire drug history) compared to no PPI use (Table). The risk was higher in the younger age group (<65 years) than the older age group (≥65 years) and the estimates were consistent when excluding individuals with chronic atrophic gastritis, other NENs, and H. pylori.

Conclusion

In this population-based study from the five Nordic countries the risk of gastric NEN was increased in PPI users compared to non-users of PPI in a seemingly dose-dependent manner. The risk was higher in younger age groups of PPI users compared to older age groups.

Disclosure

No conflicts of interest