title: "I sit to sleep"-Spirometry as a clue to diagnosis.
abstract: A 15-year-old patient presented with a 4-month history of choking while sleeping that necessitated sleeping in a sitting position. Flow-volume curve demonstrating fixed upper airway obstruction led to further workup and to the diagnosis of childhood achalasia as a cause of unusual symptoms and fixed upper airway obstruction. Pediatr Pulmonol. 2016;51:E13-E15. © 2015 Wiley Periodicals, Inc.
authors.affiliation: Pediatric Pulmonology, Ruth Rappaport Children's Hospital, Rambam Health Care Campus, Haifa, Israel.
authors.forename: Karin
authors.initials: K
authors.lastname: Yaacoby-Bianu
authors.affiliation: Pediatric Gastroenterology Unit, Ruth Rappaport Children's Hospital, Rambam Health Care Campus, Haifa, Israel.|Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
authors.forename: Ron
authors.initials: R
authors.lastname: Shaul
authors.affiliation: Pediatric Radiology, Ruth Rappaport Children's Hospital, Rambam Health Care Campus, Haifa, Israel.
authors.forename: Anat
authors.initials: A
authors.lastname: Ilivitzki
authors.affiliation: Pediatric Pulmonology, Ruth Rappaport Children's Hospital, Rambam Health Care Campus, Haifa, Israel.|Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
authors.forename: Lea
authors.initials: L
authors.lastname: Bentur
mesh_terms: D000293:Adolescent; D000402:Airway Obstruction / Q000209:etiology / Q000473:pathology / Q000601:surgery*; D004931:Esophageal Achalasia / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D049630:Esophageal Sphincter, Lower / Q000503:physiopathology / Q000601:surgery*; D018662:Fundoplication; D006801:Humans; D010535:Laparoscopy; D008297:Male; D057605:Natural Orifice Endoscopic Surgery; D013147:Spirometry / Q000379:methods; D016683:Supine Position; D016896:Treatment Outcome
keywords: achalasia; fixed upper airway obstruction; pulmonary function test; sleep medicine