TITLE

Procalcitonin is useful whereas C-reactive protein is not, to predict complications following coronary artery bypass surgery

AUTHOR(S)
Macrina, Francesco; Tritapepe, Luigi; Pompei, Francesca; Sciangula, Alfonso; Evangelista, Ernesto; Toscano, Francesca; Criniti, Anna; Brancaccio, Gianluca; Puddu, Paolo Emilio
PUB. DATE
May 2005
SOURCE
Perfusion;May2005, Vol. 20 Issue 3, p169
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: The respective value of procalcitonin (PCT) and C-reactive protein (CRP) as markers of postoperative complications after coronary bypass surgery is unclear. Therefore, complications during one week after surgery were studied to evaluate the predictive role of PCT and CRP changes during the immediate postoperative period. Methods: Thirty-two patients, in whom an uneventful immediate postoperative course was anticipated, were prospectively enrolled and followed-up to the 7th postoperative day. At the end of the follow-up, patients were divided into two groups. Group A were patients with an uncomplicated postoperative course and Group B were patients with a complicated postoperative course. Results: Serum samples were drawn for PCT and CRP determination after induction of anesthesia (baseline), at the end of surgery and daily until postoperative day 2. Baseline serum PCT concentrations were 0.11±0.09 and 0.20±0.21 ng/mL in Groups A and B, respectively (NS). Serum PCT concentration increased compared with baseline in both groups during the first two days after surgery. The increase in serum PCT concentration was significantly greater in Group B than A patients (p <0.0002). Considering a perioperative abnormal cut-off value of >0.5 ng/mL, there were none in Group A versus 57% in Group B (p <0.0001). Baseline serum CRP concentrations were 1.44±1.30 and 1.58±1.35 ng/mL in Groups A and B, respectively (NS). After surgery, CRP increased significantly compared with baseline in both groups. When changes in time-varying variables were included in a logistic model, complications were predicted by changes (between baseline and end of surgery values) of PCT (coefficient=9.410; t=2.18) and heart rate (coefficient=0.075; t=1.57), whereas changes of CRP, white blood cells, mean blood and central venous pressures did not contribute statistically. The model constant was -4.827 (t=-2.43) and the ROC curve area was 0.8971. Thus, absolute PCT changes of 0.20, 0.40 and 0.60 ng/mL carry an approximate risk of 5, 26 and 69%, respectively, of postoperative complications in the time frame of this study. Conclusions: A postoperative serum PCT concentration of >0.5 ng/mL is highly suggestive of a postoperative complication. CRP changes do not contribute to predictive information.
ACCESSION #
17360056

 

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