Abstract
Background
Magnetically controlled capsule endoscopy (MCCE) has recently increasingly been used for gastric examination. However, the image quality and esophageal observation is suboptimal. We developed a novel wired transmission magnetically controlled capsule endoscopy (WT-MCCE) system and evaluated its feasibility through in vitro and in vivo experiments.
Methods
A plastic stomach model and a pathological upper gastrointestinal model were used to evaluate the performance of WT-MCCE in vitro experiments. Twice of examination in the two in vitro models by WT-MCCE were performed by 5 endoscopists who were experienced in performing wireless capsule endoscopy. The examination of traditional gastroscopy (Olympus, GIF-HQ290) in the pathological upper gastrointestinal model was set as the control. In vivo experiments were performed in a live canine model by 3 endoscopists, in which WT-MCCE was inserted with the assistance of gastroscopy. Measurements included maneuverability, examination time, visualization of gastric mucosa, image quality and diagnostic accuracy.
Results
WT-MCCE showed good performance in both in vitro and in vivo experiments with excellent visualization of mucosa (75–100%). The mean operation time is 17.6 ± 2.7 min, 22.3 ± 1.9 min and 29.3 ± 3.4 min in three models, respectively. In pathological upper gastrointestinal model, all lesions, including esophageal varices, one polyp, one foreign body, two gastric ulcers and one duodenal ulcer, were detected by both WT-MCCE and traditional gastroscopy by all endoscopists. For the observation of esophagus and stomach in the canine model, WT-MCCE also showed excellent maneuverability and good image quality.
Conclusions
The novel WT-MCCE system performed well in evaluating upper gastrointestinal landmarks and lesions in two in vitro models, and showed good performance in a canine model. WT-MCCE may be potentially useful for diagnosis of esophageal and gastric diseases.
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Abbreviations
- WT-MCCE:
-
Wired transmission magnetically controlled capsule endoscopy
- ECE:
-
Esophageal capsule endoscopy
- MCCE:
-
Magnetically controlled capsule endoscopy
- DS-MCE:
-
Detachable string magnetically controlled capsule endoscopy
- CMOS:
-
Complementary metal oxide semiconductor
- LED:
-
Light emitting diode
- fps:
-
Frames per second
- SSS:
-
Systematic screening protocol for the stomach
- MCCG-2:
-
Second generation magnetically controlled capsule gastroscopy
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Health and Family Planning Commission of Gansu [GSWSKY2020-20], Science and Technology Department of Gansu [20YF8FA076].
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Yaoping Zhang, Lina Qu, Yani Gou, Jinyong Hao, Yanglin Pan, Xiaojun Huang have no conflicts of interest or financial ties to disclose.
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The research was approved by the Ethical Committee of Lanzhou University Second Hospital.
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Zhang, Y., Qu, L., Gou, Y. et al. In vitro and in vivo evaluation of a novel wired transmission magnetically controlled capsule endoscopy system for upper gastrointestinal examination. Surg Endosc 36, 9454–9461 (2022). https://doi.org/10.1007/s00464-022-09603-1
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DOI: https://doi.org/10.1007/s00464-022-09603-1