title: [Expiratory blockage of a Monnal S respirator caused by rupture of the capsule of a pneumatic Bennett valve].
abstract: In the recovery room, a ventilated patient suddenly developed bradycardia and severe cardiovascular collapse due to increased airway pressure. The cause of this life-threatening complication was continuous occlusion of the expiratory valve by a ruptured diaphragm in a Bennett's valve. When the rupture is located within the circular contact area with the expiratory port, the valve occludes normally during insufflation. On expiration, the expiratory gas under pressure penetrates the ruptured capsule, maintaining the valve occluded. A small part of the expired gas escapes through the small-bore connecting tube of the diaphragm.
authors.forename: C
authors.initials: C
authors.lastname: Boyer
authors.forename: E
authors.initials: E
authors.lastname: Gaertner
authors.forename: J C
authors.initials: JC
authors.lastname: Lleu
authors.forename: J R
authors.initials: JR
authors.lastname: Diebolt
authors.forename: J C
authors.initials: JC
authors.lastname: Otteni
mesh_terms: D004868:Equipment Failure; D005260:Female; D006801:Humans; D008875:Middle Aged; D011184:Postoperative Period; D012122:Ventilators, Mechanical / Q000009:adverse effects*
vernacular_title: Blocage expiratoire d'un respirateur Monnal S par rupture du ballonnet de la valve pneumatique Bennett.