Medicine
Common Pitfalls in Interpreting Arterial Blood Gas Results
Quick fact
A single ABG value can be misinterpreted if the patient's clinical presentation and previous lab trends are ignored. For example, a 'normal' pH can mask a mixed acid-base disorder that requires urgent intervention.
Why this is interesting
You have an ABG report showing a pH of 7.25, PaCO2 of 60 mmHg, and HCO3- of 25 mEq/L. You confidently diagnose respiratory acidosis and start treatment—but what if this is actually a mixed disorder? Accurate interpretation is not as straightforward as it seems.