Patent ID: 7912525

Claim:
An implantable sensing apparatus comprising: a sensor module having internal elements, a portion of said sensor module having an outer dimension; an outer tubing surrounding said sensor module, said outer tubing having an inner dimension, said inner dimension of said outer tubing and said outer dimension of said portion of said sensor module being substantially the same, but defining at least one void between said inner dimension of said outer tubing and said outer dimension of said portion of said sensor module due to inherent manufacturing tolerances; back-fill material disposed in said at least one void; and wherein said outer tubing is dimensioned relative to the sensor module to provide a compression force on the sensor module; and wherein the outer tubing has a cross-sectional dimension and the sensor module defines a cross-sectional area within the cross-sectional dimension of the outer tubing and wherein the cross-sectional area of the sensor module is about one-tenth the cross-sectional dimension of the outer tubing.