A transnasal tube device (1) for access to a body cavity (20, 21) of a patient (2) through the esophagus (22) comprises a tube (10) having a first, proximal end (100) and a second, distal end (101), a port (11) arranged at the first, proximal end (100) of the tube (10) for feeding a medical solution into the tube (10), and a inflation device (15) arranged on the tube (10), the inflation device (15) comprising an inflatable chamber (150) which is configured to, in a first, deflated state, assume a first volume (V1) to allow a passing of the tube (10) through the esophagus (22) towards a body cavity (20, 21) to be accessed by the transnasal tube device (1) and, in a second, inflated state, assume a second volume (V2) larger than the first volume (V1). Herein, the inflatable chamber (150) is defined by a membrane envelope (151) made of a material having a Shore- hardness equal to or greater than 60. In this way a transnasal tube device is provided which allows to provide an inflation device having improved characteristics with respect to the retaining of the distal end of the tube within an accessed body cavity and/or which reliably allow to for example prevent a reflux of liquid from an accessed body cavity.La présente invention concerne un dispositif de tube transnasal (1) pour l'accès à une cavité corporelle (20, 21) d'un patient (2) à travers l'œsophage (22) comprenant un tube (10) ayant une première, extrémité proximale (100) et une seconde, extrémité distale (101), un orifice (11) disposé au niveau de la première, extrémité proximale (100) du tube (10) pour l'alimentation d'une solution médicale dans le tube (10), et un dispositif de gonflage (15) disposé sur le tube (10), le dispositif de gonflage (15) comprenant une chambre gonflable (150) qui est configurée pour, dans un premier, état dégonflé, prendre un premier volume (V1) pour permettre un passage du tube (10) à travers l'œsophage (22) vers une cavité corporelle (20, 21) à atteindre par le dispositif de tub
