The application of CT scan in Nuss procedure for pectus excavatum

Objective To study the application CT scans in Nuss procedure for pectus excavatum. Methods 648 children with pectus excavatum underwent Nuss procedure from July 2002 to September 2008. The preoperative CT scan was carried out for evaluation of the deformity degree and morphology classification of chest wall malformation,

Nuss procedure for the correction of pectus excavatum by using double braces in adolescence

Objective To investigate the indication,feasibility and technique of minimally invasive Nuss procedure with thoracoscope by using double braces in the treatment of wide-scope pectus excavatum repairing in adolescence. Methods 31 patients including 24 boys and 7 girls,suffered from pectus excavtum were corrected by Nuss procedure under thoracoscope. The average age

Radiologic factors related to double-bar insertion in minimal invasive repair of pectus excavatum

Background:Pectus excavatum is the most common congenital chest wall deformity,with a high incidence in live births.This study aimed to evaluate the measured factors on CT images related to the number of pectus bars for surgical correction.Methods:A total of 497 patients who had undergone minimally invasive repair between April 2007 and July 2011 were classified into single-bar(n=358)and double­bar(n=139)insertion groups.We measured eight distinct distances and one angle on CT scans to reflect quantitative assessment.Univariate analysis and multivariate logistic regression analysis were performed to detect statistically significant association between radiologic measurements and the pectus bars required.Results:After adjusting for age and gender,the transverse distance(T),the transverse distance of the depression area(A),the inclined distance of the depression area(B),the AP distance of the depression area(C),the depression angle(G),and the eccentric distance of deformity(E)were significantly correlated with double­-bar insertion.The regression model showed that age(,P<0.0001),gender(P<0.0001),depression angle(G)(P<0.0001),direction of the depression(DD)(P<O.OOO1)and depression depth(D)(P<0.0001)were significantly associated with doublebar insertion.Conclusion:CT scan provides useful factors which can be of assistance in predicting the number of pectus bars for the surgical correction of pectus excavatum.

Pulmonary function changes following surgical correction for pectus excavatum

Objective To assess whether and to what extent pulmonary function returns to normal after surgical correction for pectus excavatum Methods Twenty seven patients who could be examined in person at the outpatient department of our hospital were included in this study Of these patients, 24 were boys and 3 were girls, with age ranging from 3 to 16 years (mean: 8 67 years) The mean age at surgery was 4 years and mean years at follow up was 6 8 Pulmonary function measurements included inspiratory vital capacity (IVC), total lung capacity (TLC), residual volume (RV), functional residual capacity (FRC), RV/TLC ratio, maximal voluntary ventilation (MVV), forced ventilatory capacity (FVC), forced expiratory volume in one second (FEV 1), maximal mid expiratory flow (MMEF), maximal expiratory flow at 75% vital capacity (V 75 ), maximal expiratory flow at 50% vital capacity (V 50 ), maximal expiratory flow at 25% vital capacity (V 25 ) and breathing reserve ratio (BR) Results TLC, FRC, MVV, MMEF, V 75 and V 50 were not different from normal values IVC, FVC, FEV 1 and V 25 were significantly decreased compared with normal values RV and RV/TLC were high in 87 5% cases Conclusions Preoperative symptoms improved substantially after operation Little airway obstruction was observed postoperatively, suggesting that patients with pectus excavatum should have surgery as early in life as possible, preferably by age 3

Changes in electrocardiogram and cardiac function after minimally invasive surgery for pectus excavatum

Background Thoracoscopic minimally invasive pectus excavatum repair （Nuss operation） features its little trauma, simple, short operation time, and good outcome compared with traditional treatment of pectus excavatum surgery-sternal elevation （Ravitch operation） and sternal turnover. The effect of the operation on patients＇ heart and heart function remains unclear. This study aimed to understand the changes of electrocardiogram and cardiac function after Nuss procedure. Methods From 2008 January to 2013 July, thoracoscopic Nuss operation was performed in 217 patients with pectus excavatum. All the patients underwent the preoperative, postoperative detection of ECG and cardiac function in 3 months to 1 year after operation. Results After 3 months to 1 year follow-up, arrhythmias persisted in 46 out of 135 patients with preoperative symptoms （P 〈 0.05）; Stroke volume and cardiac output significantly increased （P 〈 0.05）; And cardiac parameters greatly improved （P 〈 0.05）. Conclusions Minimally invasive repair of pectus excavatum deformity can correct the chest malformation, alleviate arrhythmia, and improve cardiac function.

Detection of hepatitis B virus polymerase variations resistant to lamivudine therapy

To describe our experience in the treatment of pectus excavatum (PE) using a modified sternal elevation procedure Methods From Oct 1986 to Dec 1997, 171 patients with PE were admitted to the Department of Pediatric Surgery of the First Hospital of West China University of Medical Sciences All patients were diagnosed through a history and physical examination Cardiopulmonary function was assessed by M mode echocardiography and instrument of pulmonary function in 40 patients before and 4 2 years after surgery which was performed between 1989 and 1994 We performed the following three procedures in the sternal elevation: (1) forming the metal strut in a “arch' shape, (2) suturing the perichondrium into a “pipe' shape, and (3) encouraging patients to do chest expansion exercise after operation All patients were followed up for 1 to 12 years Results The normal contour of the costal cage was enlarged in all but one patient Exercise tolerance was improved, and cardiac function recovered to the same level as in healthy children, while pulmonary function recovered very slowly after surgery Conclusion The normal appearance of chest wall can be recovered and normal cardiopulmonary function can be restored by the modified sternal elevation procedure in children with PE