What does the term "-centesis" refer to in a medical procedure?

The term "-centesis" refers specifically to a medical procedure involving the removal of fluid from a body cavity. This is often done to diagnose or treat various conditions, such as pleural effusion or ascites. For instance, a procedure like amniocentesis involves the withdrawal of amniotic fluid from the sac surrounding the fetus, which can be used for genetic testing or to assess the health of the fetus.

The suffix "-centesis" is derived from the Greek word "kentesis," meaning "to pierce." This indicates that the procedure involves a needle or similar instrument being used to puncture a body cavity or organ to extract fluid. Understanding this term is crucial for interpreting medical procedures as it helps to clarify not just the action being taken but also the purpose behind it.

Options relating to creating an opening, cutting into, or pertaining to do not align with the specific action of fluid removal that "-centesis" signifies.