Pressure indicator comprising a plinth (2), a deformable membrane (3) fixed to the plinth (2) in a fluid-tight manner according to a closed contour (6), and a bell jar (4) fixed to the plinth (2), delimiting a hollow volume covering the deformable membrane (3) on the opposite side from the plinth (2), while encompassing at least the closed contour (6), at least one entrance inlet (5) for a fluid whose pressure it is desired to measure in a span of pressure, where the deformable membrane (3) is such that its expansion (E) for said pressure span is sufficient to be detectable to the naked eye and to allow a direct display indicative of the pressure, in that the plinth (2) is drilled with at least one first hole (7) a first end of which emerges between the deformable membrane (3) and the plinth (2) in the closed contour (6), in that the body (4) is drilled with at least one second hole (8) a first end of which emerges into said hollow volume, in that the other end of the first hole (7) is linked to the entrance inlet (5) respectively to the open air, in that the other end of the second hole (8) is linked to the open air, respectively to the entrance inlet (5), so that a pressure, respectively a pressure reduction, of fluid at the entrance inlet (5) causes an expansion of the deformable membrane (3) in the hollow volume delimited by the body (4). Application of such an indicator to the monitoring of the inflation of a medical apparatus cushioning 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 pressi
