title: Can plasma fibrinogen levels predict bleeding after coronary artery bypass grafting?
abstract: BACKGROUND
  Fibrinogen is the main biomarker for bleeding. To prevent excessive postoperative bleeding, it would be useful to identify high-risk patients before coronary artery bypass grafting (CABG).
  
  
  OBJECTIVE
  In order to predicating bleeding after CABG, we sought to determine whether preoperative fibrinogen concentration was associated with the amount of bleeding following CABG.
  
  
  METHODS
  A total of 144 patients (mean age = 61.50 ± 9.42 years; 65.7% men), undergoing elective and isolated CABG, were included in this case-series study. The same anesthesia technique and medicines were selected for all the patients. In the ICU, the patients were assessed in terms of bleeding at 12 and 24 hours post-operation, amount of contingent blood products received, and relevant tests. Statistical tests were subsequently conducted to analyze the correlation between preoperative fibrinogen concentration and the amount of post-CABG bleeding.
  
  
  RESULTS
  The mean ± standard deviation of bleeding at 12 and 24 hours post-operation was 285.37 ± 280.27 and 499.31 ± 355.57 mL, respectively. The results showed that postoperative bleeding was associated with different factors whereas pre-anesthesia fibrinogen was not correlated with bleeding at 12 (P = 0.856) and 24 hours (P = 0.936) post-operation. There were correlations between the extra-corporal circulation time and bleeding at 12 hours post-operation (ρ = 0.231, P = 0.007) and bleeding at 24 hours post-operation (ρ = 0.218, P = 0.013).
  
  
  CONCLUSIONS
  Preoperative assessment of plasma fibrinogen levels failed to predict post-CABG bleeding.
authors.affiliation: Department of Cardiac Anesthesiology, Baqiyatallah University of Medical Sciences, Tehran, IR Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Jalali
authors.affiliation: Department of Cardiac Anesthesiology, Baqiyatallah University of Medical Sciences, Tehran, IR Iran.
authors.forename: Mohammadsaeid
authors.initials: M
authors.lastname: Ghiasi
authors.affiliation: Department of Anesthesiology, Baqiyatallah University of Medical Sciences, Tehran, IR Iran.
authors.forename: Aghdas
authors.initials: A
authors.lastname: Aghaei
authors.affiliation: Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Shiva
authors.initials: S
authors.lastname: Khaleghparast
authors.affiliation: Mental Health Research Center, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Behrooz
authors.initials: B
authors.lastname: Ghanbari
authors.affiliation: Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Hooman
authors.initials: H
authors.lastname: Bakhshandeh
keywords: Coronary Artery Bypass; Fibrinogen; Hemorrhage