**1. Introduction**

Technological development has brought the opportunity for significant advances in the health area. As new sensors have been developed, tools for image acquisition and treatment are improved and analytical methods using modern algorithms and artificial intelligence are developing, the set of tools available to assist in the diagnosis and monitoring of patients has been expanded.

ICP is a good example of how technological advancement has led to clinical understanding. Initially, only the number corresponding to the mean ICP was used to guide clinical procedures. Until then, there was only one number, and the information was punctual, it was as if we looked at a photo.

Advancing in understanding disclosed the value of having available real time information on early stages of intracranial hypertension (ICH), thus, techniques that show the pressure trend curve proved to be remarkable for the follow-up of critically ill patients.

The information resulting from morphology will be treated in greater detail in this chapter, and today it is known that monitoring ICP is far over knowledge of a mean value, but also its trend over time, and the morphology of the pressure pulse recognition.
