Pressure indicator comprising a base (2), a deformable membrane (3) fixed to the base (2) in fluid-tight manner in a closed contour (6), and a bell (4) fixed to the base (2), delimiting a hollow volume covering the deformable membrane (3) on the side opposite to the base (2), including at least the closed contour (6), at least one inlet mouth (5) of a fluid whose pressure is to be measured in a pressure range, where the deformable membrane (3) is such that its expansion (E) for said pressure range is sufficient to be detectable to the naked eye and allow a direct indicative display of the pressure, in that the base (2) is pierced with at least a first hole (7), a first end of which opens between the deformable membrane (3) and the base (2) in the closed contour (6), in that the body (4) is pierced with at least one second hole (8), one end of which opens into said hollow space, in that the other end tee of the first hole (7) is connected to the inlet mouth (5), respectively to the open air, in that the other end of the second hole (8) is connected to the open air, respectively to the inlet mouth (5), so that a pressure, respectively depression, of fluid at the inlet mouth (5) causes an expansion of the deformable membrane (3) in the hollow volume defined by the body ( 4). Application of such an indicator to monitoring the inflation of a medical device pad.Indicateur de pression comprenant un socle (2), une membrane déformable (3) fixée au socle (2) de manière étanche aux fluides selon un contour fermé (6), et une cloche (4) fixée au socle (2), délimitant un volume creux recouvrant la membrane déformable (3) du côté opposé au socle (2), en englobant au moins le contour fermé (6), au moins une embouchure d'entrée (5) d'un fluide dont on veut mesurer la pression dans une plage de pression, où la membrane déformable (3) est telle que son expansion (E) pour ladite plage de pression soit suffisante pour être détectable à l'il nu et permettre un affichage direct indicatif
