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Coagulation Profile: Alterations and Diagnostic Yield in Pediatric Acute Appendicitis. A Prospective Validation Study.

Surgical Infections 2023 March 24
Background: The literature regarding alterations in the coagulation profile in pediatric acute appendicitis (PAA) is scarce and mainly limited to retrospective studies. Evidence on the diagnostic yield of coagulation parameters is limited to fibrinogen. Patients and Methods: This is a prospective study with 151 patients divided into two groups: patients with nonsurgical abdominal pain (NSAP) in whom the diagnosis of PAA was excluded (n = 53) and patients with a confirmed diagnosis of PAA (n = 98). In 93 patients (62%), a coagulation study was obtained at the time of diagnosis and international normalized ratio (INR), activated partial thromboplastin time (aPTT), d-dimer, platelets, mean platelet volume, and platelet-to-lymphocyte ratio were analyzed. The PAA group was further classified into complicated (n = 19) and non-complicated PAA (n = 40). Quantitative variables were compared between groups using the Mann-Whitney U test. Diagnostic performance of the coagulation profile was evaluated with the area under the receiver operating characteristic (ROC) curves. Results: Patients with NSAP had lower median levels of INR, fibrinogen and d-dimer than those with PAA. Moreover, patients with complicated PAA had higher median values of INR and fibrinogen. None of the patients needed specific treatment for the correction of coagulopathy. Fibrinogen was the parameter with the highest diagnostic yield for distinguishing between NSAP and PAA (area under the curve [AUC], 0.74; 95% confidence interval [CI], 0.65-0.85), as well as between complicated versus non-complicated PAA (AUC, 0.71; 95% CI, 0.57-0.86). Conclusions: This study found a moderate extrinsic pathway coagulopathy in patients with PAA, especially in complicated PAA. Fibrinogen is a parameter with moderate diagnostic yield for the diagnosis of PAA.

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