We did, in fact, record the oxygen saturation levels from both our arterial and central venous blood gasses and we would be happy to share them with the surgical and toxicology communities. We had 116 total pairs of measured arterial and central venous blood gas levels. This is more than we reported in our article1 because some patients only had 1 or 2 sets of gasses drawn and we were trying to establish a correlation. Toward that end, we initially only included patients that had 4 sets of blood gasses so that our data would not favor the patients with more measurements.
Malinoski DJ, Mullins RJ, Schreiber MA. Venous Blood Oxygen Saturation—Reply. Arch Surg. 2006;141(7):716. doi:10.1001/archsurg.141.7.716-b