Which suffix indicates a process of measurement related to fluids?

The suffix that indicates a process of measurement related to fluids is -metry. This suffix is derived from the Greek word "metron," meaning measure. In medical terminology, it is often used to describe various techniques for measuring bodily functions or properties, such as in "metry" for processes like cardiometry (measuring the heart) and spirometry (assessing lung volumes and airflow). When it comes to fluids specifically, "metry" can be relevant in contexts like measuring blood pressure, hydration levels, or other fluid-related assessments.

The other suffixes do not pertain to the measurement of fluids. For instance, -clast refers to something that breaks down or destroys, often used in terms like osteoclast, which relates to bone destruction. -desis denotes binding or surgical fixation, used in terms like arthrodesis, which refers to the surgical fusion of a joint. Lastly, -pexy suggests a surgical fixation or attachment of an organ or structure to another, as seen in procedures like nephropexy, which stabilizes a kidney. Thus, -metry is uniquely characterized by its implication of measurement, particularly in contexts that may involve fluids.