Q: What is "wedged blood PO2" and what is the clinical implication?

Answer: "Wedged blood Po2" is the level of PO2 while Pulmonary artery catheter baloon is inflated (wedging).

Wedge blood Po2 should be atleast 20 mm Hg higher than arterial PO2 (ABG) to confirm that you are measuring Pulmonary artery occlusion pressure at right level/spot.

Reference:
Paul L. Marino - The little ICU book of facts and Formulas, 2009 - Page 119