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Prognostic Value of Chest-Tube Amylase Versus C-Reactive Protein as Screening Tool for Detection of Early Anastomotic Leaks After Ivor Lewis Esophagectomy.

INTRODUCTION
Intrathoracic anastomotic leaks after esophagectomy are a significant cause of morbidity and death. Early detection and timely management are crucial. This study evaluates the effectiveness of daily drain amylase levels in detecting early leaks after esophagectomy compared with C-reactive protein (CRP).


MATERIALS AND METHODS
Between June 2015 and September 2017, 126 esophagectomies were performed in our department. Amylase levels were collected in 80 of these patients, as long right-sided chest tubes were in place. Mostly, chest tubes were removed before postoperative day (POD) 5. CRP levels were measured daily. Early leaks were defined as occurring with the chest tubes in place. According to the obtained receiver operating characteristics curves, amylase levels >335 U/L, and CRP >30 mg/dL were considered positive. Sensitivity and specificity for both drain amylase and CRP were calculated.


RESULTS
Overall anastomotic leak rate was 7.5% (6/80). An early disruption occurred in 4 of 80 patients (5%). Three patients had a positive amylase level and none a positive CRP on POD 1. These 3 patients had on POD 2 a positive CRP. The fourth patient presented at POD 2 bilious secretion in the chest tubes. He showed normal amylase and CRP levels on POD 1. Sensitivity and specificity for amylase level and CRP within the first 3 PODs were 0.75 and 0.98 versus 0.75 and 0.85, respectively. The patients with leak were reoperated at POD 2. They were all discharged between PODs 15 and 19.


CONCLUSIONS
Amylase level after esophagectomy is a more accurate screening tool for detection of early leaks than CRP. It could facilitate their detection up to 24 hours earlier than CRP.