What is characterized by a pH of 7.4, pO2 of 98, pCO2 of 38, and HCO3 of 25?

The values provided indicate a state of acid-base balance that falls within the typical reference ranges for arterial blood gases. A pH of 7.4 is within the normal range (which is approximately 7.35 to 7.45), suggesting that the blood is neither acidic nor alkaline. The pO2 of 98 mmHg indicates adequate oxygenation, with normal values generally being between 75 and 100 mmHg. The pCO2 of 38 mmHg is also in a normal range (around 35 to 45 mmHg), indicating a stable respiratory function without significant hypercapnia or hypocapnia. Lastly, the HCO3 of 25 mEq/L is within the normal range (22 to 26 mEq/L), showing that the bicarbonate level is appropriately balanced.

These values collectively reflect a normal physiological state where the processes regulating acid-base balance are functioning effectively. This demonstrates that there is no underlying respiratory or metabolic disturbance present, confirming that the correct characterization of these values is "normal values."