Respiratory acidosis - causes, symptoms, diagnosis, treatment, pathology

Introduction to Respiratory Acidosis00:00:02

Respiratory acidosis is defined as a condition where blood pH drops below 7.35 due to the respiratory system's failure to maintain proper acid-base balance.

Mechanisms of Ventilation and CO2 Regulation00:00:18

The lungs regulate blood pH by exhaling CO2. If CO2 levels rise, chemoreceptors trigger increased ventilation to restore balance. Respiratory acidosis occurs when this ventilation is inadequate.

Causes of Respiratory Acidosis00:02:02

Inadequate ventilation can stem from brainstem issues (e.g., strokes or drug overdoses), neuromuscular disorders (e.g., myasthenia gravis), physical chest wall limitations (e.g., obesity), airway obstructions, or impaired gas exchange in the lungs (e.g., COPD or pneumonia).

Compensatory Mechanisms00:03:36

The body attempts to compensate for rising CO2 and low pH through chemical buffering in cells and, eventually, renal compensation where the kidneys reabsorb bicarbonate.

Acute vs. Chronic Phases00:05:42

Acute respiratory acidosis occurs before renal intervention, while chronic respiratory acidosis involves the kidneys stepping in over 3-5 days to significantly increase bicarbonate levels and stabilize pH.