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  • Title: Elevated serum C-reactive protein as a predictive factor for anastomotic leakage in colorectal surgery.
    Author: Almeida AB, Faria G, Moreira H, Pinto-de-Sousa J, Correia-da-Silva P, Maia JC.
    Journal: Int J Surg; 2012; 10(2):87-91. PubMed ID: 22222182.
    Abstract:
    BACKGROUND: C-reactive protein (CRP) has been used as an indicator of postoperative complications in abdominal surgery. Its short half-life makes it a reliable marker of the systemic inflammatory response secondary to a surgical procedure or to the appearance of complications, rapidly returning to normal values with the recovery of the patient. AIM: To demonstrate the value of sequential serum determinations of postoperative C-reactive protein (CRP) and white blood cell counts (WBC) in the identification of increased risk of anastomotic leakage after colorectal surgery. METHODS: We reviewed the daily postoperative serum CRP and white blood cell counts in 173 patients who underwent surgery for colorectal disease with anastomosis, between January 2008 and October 2009. Patients with anastomotic leakage (Group A, n = 24) were compared to patients without leakage (Group B, n = 149). Patients with ongoing infections before surgery or with acquired postoperative infections other than leakage were excluded. Mean pre- and postoperative values of CRP and WBC were compared. RESULTS: The diagnosis of anastomotic leakage was made between the 4th and 11th postoperative day (POD; mean 7th POD). The daily average values of serum CRP were significantly higher in group A starting at the 2nd POD and remained significantly elevated until the diagnosis of leakage (p = 0.003). The cut-off value of 140 mg/L on the 3rd POD maximized the sensitivity (78%) and specificity (86%) of serum CRP in assessing the risk of leakage. Comparison of postoperative serum WBC values did not show any significant differences between the two groups until the 6th POD. CONCLUSION: According to these results, an early and persistent elevation of CRP after colorectal surgery with anastomosis, is a marker of anastomotic leakage. A cut-off value > 140 mg/L on POD3 maximizes sensitivity and specificity.
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