BioPHIX aims to advance spinal cord injury (SCI) treatment, making the development of precise, biocompatible, and reliable temperature monitoring solutions a significant step forward in optimizing therapeutic hypothermia protocols. BioPHIX will design a novel polymer fibre temperature sensor capable for immediate implantation within the patient for prolonged observation of the patient’s physiological responses, during therapeutic hypothermia in SCIs, both during and post operation. This device will address one of the most vital shortcomings of the current temperature sensors; the ability to remain for an extended duration within the patient by minimizing the effect of a foreign body reaction response (FBR). The biocompatible polymer sensing device will achieve just that, while, at the same time augmenting the performance of the current state-of-the-art by combining the benefits of unique polymer materials with femtosecond lasers to facilitate the unique sensing structure.