Total exchangeable potassium was measured in a group of dogs undergoing cardiopulmonary bypass with the radionuclide technique (42K). No alteration of total body content occurred after perfusion. This study supports the finding that a decrease of total exchangeable potassium does not occur solely as a result of extracorporeal circulation.
Kirsh MM, Moores WY, Morales J, et al. Effect of Extracorporeal Circulation on Total Body Potassium. Arch Surg. 1970;101(4):500–502. doi:10.1001/archsurg.1970.01340280052013
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