Implantable device including pressure sensor

An implantable device for being introduced into a subject, wherein the implantable device is a stent or a heart valve, the implantable device comprising:

• a pressure sensor that comprises:
• a casing comprising a diffusion blocking layer covering at least a part of the casing and configured to maintain a predetermined pressure within the casing, and
• a magneto-mechanical oscillator comprising a magnetic object providing a permanent magnetic moment within the casing,
• wherein the magneto-mechanical oscillator is configured to transduce an external magnetic or electromagnetic excitation field into a mechanical oscillation of the magnetic object,
• wherein at least a part of the casing is flexible for allowing transducing external pressure changes into changes of the mechanical oscillation of the magnetic object,
• wherein the pressure sensor is a passive sensor configured to be wirelessly read out by a reading system placed outside the subject.