ABG Compensation Patterns

The bicarbonate buffer system, composed of carbonic acid (H2CO3) and bicarbonate (HCO3-), serves as the body's most important extracellular buffer, maintaining acid-base balance critical for cellular function. Even small deviations outside the normal pH range can impair enzyme function, alter electrolyte balance, and compromise cellular metabolism, underscoring the need for vigilant monitoring. In cases of metabolic acidosis, observe for Kussmaul respirations—deep, rapid breathing—as a compensatory mechanism attempting to restore homeostasis. Nursing priorities include stabilizing the airway, breathing, and circulation (ABCs), implementing interventions targeted at the underlying cause, and promptly reassessing the patient's status to escalate care early if the clinical trajectory worsens.