biostudies-literatureUnknown29(1)Mori H<h4>Background</h4>Tumor size determination is subject to the measurement method used by endoscopists and is especially dependent on the air quantity. As the intraluminal pressure must be measured objectively to obtain an accurate tumor size measurement, insufflation can affect the results. Thus, we examined the utility of a micro-electro-mechanical-system (MEMS) pressure sensor hood.<h4>Methods</h4>Twenty consecutive air insufflation/deflation tests were performed in vivo using a dog's stomach. Correlations between the actual pressure measured and the signal strength of the MEMS hood were measured. We marked 2 points 20 mm on the antrum and another 3 points, with insufflation corresponding to the maximum stable distance of two markings. We performed five insufflation/deflation tests to obSurgical endoscopy212-9https://www.ebi.ac.uk/biostudies/studies/S-EPMC4293473biostudies-literaturePrecise tumor size measurement under constant pressure by novel real-time micro-electro-mechanical-system hood for proper treatment (with videos).PMC4293473Fujihara SMori HTakao HKobara HMasaki TNishiyama NAyaki MMatsunaga TfalsePrecise tumor size measurement under constant pressure by novel real-time micro-electro-mechanical-system hood for proper treatment (with videos).<h4>Background</h4>Tumor size determination is subject to the measurement method used by endoscopists and is especially dependent on the air quantity. As the intraluminal pressure must be measured objectively to obtain an accurate tumor size measurement, insufflation can affect the results. Thus, we examined the utility of a micro-electro-mechanical-system (MEMS) pressure sensor hood.<h4>Methods</h4>Twenty consecutive air insufflation/deflation tests were performed in vivo using a dog's stomach. Correlations between the actual pressure measured and the signal strength of the MEMS hood were measured. We marked 2 points 20 mm on the antrum and another 3 points, with insufflation corresponding to the maximum stable distance of two markings. We performed five insufflation/deflation tests to ob2015-01-01T00:00:00Z2015 Jan2025-05-29T21:21:30.895Z2025-05-29T21:21:30.895ZS-EPMC42934732499316910.1007/s00464-014-3642-3