Complex Care Exam 1 Practice 2026 - Free Complex Care Practice Questions and Study Guide

In metabolic acidosis from renal dysfunction, the kidneys fail to excrete acid and/or reabsorb bicarbonate, leading to a fall in bicarbonate and a drop in pH. When this is the hyperchloremic type, chloride rises to maintain electroneutrality, but the key clue remains the low bicarbonate accompanying a lower pH. So a decreasing pH with low HCO3− directly reflects metabolic acidosis due to impaired renal handling of acid–base balance.

The other patterns point to different situations: a higher pH with higher bicarbonate shows alkalosis; a lower pH with higher bicarbonate would suggest a mixed or atypical process; normal pH with normal bicarbonate indicates no acid–base disturbance.