title: [The length of digestive tract intubation under fibrogastroscopic guidance].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D005336:Fiber Optic Technology; D005773:Gastroscopy; D006801:Humans; D007441:Intubation, Gastrointestinal / Q000379:methods*; D008297:Male; D008875:Middle Aged