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The Journal of Thoracic and Cardiovascular Surgery, Vol 97, 900-905, Copyright © 1989 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
YA Barry, RS Labow, WJ Keon, M Tocchi and G Rock
Di(2-ethylhexyl)phthalate and its principal metabolite, mono(2-
ethylhexyl)phthalate, are contaminants of blood that are extracted on
contact with polyvinylchloride surfaces, such as blood collection bags and
tubing used in cardiopulmonary bypass. In this study, levels of the two
plasticizers were measured in patients who underwent coronary artery bypass
grafting, orthotopic transplantation, implantation of the Jarvik 7-70 total
artificial heart during bridge-to-transplant procedures, and in infants who
underwent corrective operations for congenital defects. In all adult
patients the levels of di(2- ethylhexyl)phthalate increased tenfold by the
end of cardiopulmonary bypass, whereas the levels of
mono(2-ethylhexyl)phthalate increased ninefold. In infants, levels of
di(2-ethylhexyl)phthalate rose seven times by the end of bypass and
mono(2-ethylhexyl)phthalate rose significantly as well. In most of the
patients having coronary bypass, the two plasticizers declined to
preoperative levels within 24 hours. However, in some of the patients
having orthotopic transplantation and in those in whom the Jarvik 7-70
total artificial heart was used as a bridge to transplant, the levels were
still detectable 120 hours postoperatively. Circulating levels of
mono(2-ethylhexyl)phthalate are only 20- to 35-fold lower in patients
undergoing cardiac operations than the level of mono(2-ethylhexyl)phthalate
causing a 50% reduction in developed contractile force and arrhythmias in
an in vitro human atrial trabecular preparation. This study shows that
patients with multisystem failure and infants may be at risk for this acute
exposure to mono(2-ethylhexyl)phthalate.
ARTICLES
Perioperative exposure to plasticizers in patients undergoing cardiopulmonary bypass
Ottawa Centre, Canadian Red Cross, Blood Transfusion Service, Ontario, Canada.
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