IMPLANTABLE PRESSURE SENSOR WITH A MEMBRANE AND A SUPERPOSED BRIDGE

摘要

An implantable pressure sensor (100) having improved bend error performance is provided having a capsule (102) housing a pressure sensing device (106), wherein the capsule includes an opening that allows the pressure sensing device to obtain pressure measurements from an environment surrounding the capsule. A rigid bridge (108) is attached to the capsule so as to extend across the opening of the capsule. The bridge includes at least one opening (112) that exposes the pressure sensing device to the surrounding environment. The rigidity of the bridge functions to prevent deformations from bending forces that are exerted on the sensor and also functions to divert loads from such bending forces away from the pressure sensing device to instead travel through the bridge, which in turn resists deformation. A fill material may be situated between the bridge and capsule so as to prevent bodily fluid or tissue from building up in the sensor under the bridge.