title: Effects of body positions on gastric emptying with enteral nutrition: a crossover study using a continuous real time 13C breath test (BreathID system).
abstract: OBJECTIVE
  The aim of this study was to determine whether there was a correlation between body positions and gastric emptying, using a novel non-invasive technique for measuring gastric emptying with a continuous real time 13C breath test (BreathID system).
  
  
  METHODS
  Ten healthy male volunteers participated in this randomized, two-way crossover study. On both occasions, the 13C breath test was performed for 4 hours using the BreathID system with a liquid meal (200 kcal per 200 mL) containing 100 mg 13C-acetic acid. Subjects were randomly assigned to sit comfortable (the sitting position) or to lie supine (the lying position).
  
  
  RESULTS
  In the lying position, T 1/2 and T lag were significantly delayed. The gastric emptying coefficient was also decreased in lying position.
  
  
  CONCLUSIONS
  This study showed that gastric emptying following a liquid meal was significantly delayed in the lying position compared to the sitting position, suggesting the potential use of these findings in the clinical setting for patients receiving enteral nutrition via the stomach.
authors.affiliation: Gastroenterology Division, Yokohama City University Hospital, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
authors.forename: Tamon
authors.initials: T
authors.lastname: Ikeda
authors.forename: Masahiko
authors.initials: M
authors.lastname: Inamori
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Fujisawa
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Iwasaki
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Akiyama
authors.forename: Keiko
authors.initials: K
authors.lastname: Akimoto
authors.forename: Hironori
authors.initials: H
authors.lastname: Mawatari
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Iida
authors.forename: Hiroki
authors.initials: H
authors.lastname: Endo
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Nozaki
authors.forename: Yasunari
authors.initials: Y
authors.lastname: Sakamoto
authors.forename: Koji
authors.initials: K
authors.lastname: Fujita
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Masato
authors.initials: M
authors.lastname: Yoneda
authors.forename: Kyoko
authors.initials: K
authors.lastname: Yoneda
authors.forename: Ayumu
authors.initials: A
authors.lastname: Goto
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Abe
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kirikoshi
authors.forename: Noritoshi
authors.initials: N
authors.lastname: Kobayashi
authors.forename: Kensuke
authors.initials: K
authors.lastname: Kubota
authors.forename: Satoru
authors.initials: S
authors.lastname: Saito
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nakajima
mesh_terms: D000328:Adult; D001944:Breath Tests / Q000379:methods*; D018592:Cross-Over Studies; D004750:Enteral Nutrition; D005746:Gastric Emptying; D006801:Humans; D008297:Male; D011187:Posture