Questions

A 4-year-old boy presents to the Emergency Department with severe dehydration following 3 days of diarrhoea and vomiting. After multiple failed peripheral IV attempts, an intraosseous line is placed in the proximal tibia. Blood samples are drawn from both the IO line and a subsequently obtained peripheral venous line for analysis.

Which of the following laboratory values would show the MOST significant difference between the IO and venous samples?