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Current limitations in endoscopic CO₂ insufflation for NOTES: flow and pressure study
Kiyokazu Nakajima1, Toshirou Nishida, Jeffrey W Milsom
1Department of Surgery, Osaka University Graduate School of Medicine, Yamadaoka, Osaka, Japan. knakajima@gesurg.med.osaka-u.ac.jp
Gastrointestinal Endoscopy
|October 2, 2010
Summary
Current CO₂ insufflators are not optimal for Natural Orifice Transluminal Endoscopic Surgery (NOTES). Further development of endoscopic insufflation systems is essential for effective NOTES procedures.
Area of Science:
- Minimally Invasive Surgery
- Gastroenterology
- Surgical Technology
Background:
- Natural orifice transluminal endoscopic surgery (NOTES) requires efficient CO₂ insufflation.
- Optimal endoscopic insufflation systems for NOTES are currently undetermined.
Purpose of the Study:
- To evaluate the performance of two CO₂ insufflators (UHI-3 and UCR) in an experimental NOTES setting.
- To compare their effectiveness in establishing and maintaining pneumoperitoneum.
Main Methods:
- Inanimate bench study and acute animal experiment.
- Tested UHI-3 and UCR with varying endoscope and insufflating line dimensions.
- Measured flow rates, time to pneumoperitoneum, and time to re-establish pneumoperitoneum after suction.
Main Results:
- UHI-3 required large channels/lines for adequate flow via the working channel.
- UCR demonstrated slower pneumoperitoneum establishment and re-establishment compared to UHI-3 via working channel or laparoscopic cannula.
- Neither system proved optimal for NOTES insufflation.
Conclusions:
- Existing CO₂ insufflators are suboptimal for NOTES procedures.
- Modifications to endoscopic insufflation systems are necessary.
- Development of dedicated overtubes with insufflation capabilities is recommended.
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