Clinical study on standardized scoring system after repair of tetralogy of Fallot

Abstract

Objective To establish a standardized scoring system after tetralogy of Fallot(TOF) correction and explore its clinical application values. Methods During the period of Jan.2006 and Apr.2014 at the Third Affiliated Hospital, Zhengzhou University and Henan Provincial People's Hospital, a total of 624 infants undergoing stage I anatomic correction were selected and their common clinical parameters such as liver size, systolic blood pressure, urinary volume, oxygenation index and occurrences of complications were recorded and scored.The cases were divided into low-risk, medium-risk and high-risk groups according to scores.The relevant endpoint parameters, including mortality or survival, on-pump time, intensive care unit(ICU) duration, hospitalization and medical expenses were recorded to analyze their relationship with postoperative scores. Results The data indicated that the short-term mortality after repair of tetralogy of Fallot was 5%.Moreover, there was no statistical difference(P=0.309) in the mortality between the low-risk group (total score 7 and mortality of >80%). The postoperative standby time, ICU stay, total hospital stays and cost increased with the rise of the score(P<0.001), and there were no statistical differences in hospital stays(P=0.469) and cost(P=0.365) between the medium-risk group and the high-risk group. Conclusions Based upon common clinical parameters, a standardized scoring system has been successfully established for patients after TOF correction, which plays an important role in gauging the disease progression and predicating the immediate postoperative outcomes of TOF. Key words: Tetralogy of Fallot; Prognosis; Scoring