Learning curve of minimally invasive transthoracic device closure of ventricular septal defect
DUAN Shu-hua
XING Quan-sheng
RONG You-bao
Abstract：Objective To evaluate the clinical results of minimally invasive transthoracic device closure of ventricular septal defect (VSD) without cardiopulmonary bypass (CPB) under transesophageal echocardiography (TEE) guidance and to analyze the learning curve of this kind of operation. Methods Clinical data of a consecutive series of 60 VSD patients from April 2007 to October 2008 were reviewed. The patients were divided equally into 4 groups ( group A, B, C, D, n = 15 in each group). The operative time, quantity of bleeding, ratio of converting to intracardiac repair, complications and hospital stay were compared among the 4 groups. Results There was no difference among the 4 groups in terms of age, gender, body weight and the type of VSDs ( P ＞ 0.05). While the operative time in group A (29.6 ± 9.6) min and group B (27.4 ± 9.2) min were significantlylonger than that in group C (20.0 ± 8.2 min, P ＜ 0.01 ) and group D ( 17.1 ± 7.2 min, P ＜ 0. 01 ), there was no difference between group C and D (P=0.366). The quantity of bleeding in group A (59.7 ± 13.4)ml and group B (54.3 ±9.9)ml were more than that in group C (40.3 ± 7.4ml, P ＜ 0. 001 ) and group D ( 36.3 ± 8.9 ml, P ＜ 0. 001 ), but no difference was shown between group C and D ( P= 0.366). No difference was shown regarding complications, ratio of converting to intracardiac repair, and hospital stay between the 4 groups. Conclusion The learning curve of minimally invasive transthoracic device closure of VSD without CPB under TEE guidance is approximately 30 cases.
Keywords：Ventricular septal defectsMinimally invasiveNon-cardiopulmonary bypass DeviceTransesophageal echocardiographyLearning curve
Publication Date：2011-01-01
Online Publishing Date：2026-09-14(First online date of this platform, not the publication date of the document)