Objective To explore the application effect of 3D printed heart models in the training of young cardiac surgeons, and evaluate their application value in surgical simulation and skill improvement. MethodsEight young cardiac surgeons were selected form West China Hospital as the trainees. Before training, the Hands-On Surgical Training-Congenital Heart Surgery (HOST-CHS) operation scores of the 8 cardiac surgeons were obtained after operating on 2 pig heart models of ventricular septal defect (VSD). Subsequently, simulation training was conducted on a 3D printed peri-membrane VSD heart model for 6 weeks, once a week. After the training, all trainees completed 2 pig heart VSD repair surgeries. The improvement of doctors’ skills was evaluated through survey questionnaires, HOST-CHS scores, and operation time after training. ResultsBefore the training, the average HOST-CHS score of the 8 trainees was 52.2±6.3 points, and the average time for VSD repair was 54.7±7.1 min. During the 6-week simulation training using 3D printed models, the total score of HOST-CHS for the 8 trainees gradually increased (P<0.001), and the time required to complete VSD repair was shortened (P<0.001). The trainees had the most significant improvement in scores of surgical cognition and protective awareness. The survey results showed that trainees were generally very satisfied with the effectiveness of 3D model simulation training. Conclusion The 3D printed VSD model demonstrates significant application advantages in the training of young cardiac surgeons. By providing highly realistic anatomical structures, 3D models can effectively enhance surgeons’ surgical skills. It is suggested to further promote the application of 3D printing technology in medical education, providing strong support for cultivating high-quality cardiac surgeons.
目的评价单穿刺点经胸微创封堵治疗房间隔缺损（ASD）合并室间隔缺损（VSD）的安全性及有效性。 方法纳入2014年6月至2015年8月于我院成功完成单穿刺点经胸微创封堵术治疗ASD合并VSD的8例患儿，分析患儿在术后第l个月、3个月、6个月的门诊随访资料。观察围术期及随访期间患者残余分流、瓣膜反流、心律失常等并发症发生情况。 结果8例患儿中，术后早期均无残余分流、心律失常，微量三尖瓣反流（TR）患者1例（12.5%）。平均随访时间5～9（6±2）个月，各瓣膜均未发现中度及以上反流，未发现存在血栓、严重心律失常、死亡的患者。 结论单穿刺点经胸微创封堵治疗ASD合并VSD安全、有效，且更为微创。
Objective To investigate the safety and effectiveness of perventricular device closure (PDC) for congenital ventricular septal defects (VSD) by a meta-analysis.Methods PubMed, The Cochrane Library, EMbase and China Biology Medicine (CBM) databases were searched for studies on PDC of VSD up to October 2018 by computer. We included studies only with more than 80% patients diagnosed with perimembranous VSD. A meta-analysis was performed to obtain pooled estimates of success rate and incidences of complications with 95% confidence interval (CI). Subgroup analysis stratified by percentage of perimembranous VSD was performed. Risk difference (RD) was used in the comparison of perioperative data with follow-up data. Results Fifteen studies (2 randomized controlled trials, 3 retrospective cohorts, and other 10 retrospective single-arm studies) involving 4 164 patients (3 848 patients with perimembranous VSD) were included in this meta-analysis. The pooled success rate was 95.4%. Incidences of residual shunt, aortic insufficiency, tricuspid insufficiency, and third-degree atrioventricular block were 5%, 0.1%, 3%, and less than 0.001% respectively. Improvements of residual shunt and aortic insufficiency were confirmed in follow-up patients. Conclusion PDC of congenital perimembranous VSDs is safe and yields good results. Because some limitations can not be overcomed, multicenter randomized controlled trials are needed to confirm our results.
Objective To compare the effects of transthoracic device closure and surgical closure on ventricular septal defect systemically. Methods A systematic literature search was conducted using the PubMed, EMbase, The Cochrane Library, VIP, CNKI, CBM, Chinese Clinical Trial Register, ClinicalTrials. gov and Wanfang Database up to July 31, 2016. Quality was assessed and data of included articles were extracted. The meta-analysis was conducted using RevMan 5.0 and Stata 14.0 software. Results Eleven studies were identified, including 5 RCTs and 6 cohort studies involving 2 504 patients. For success rate, there was no statistical difference between the transthoracic closure group and the surgical closure group in RCT (RR=0.99, 95%CI 0.96 to 1.03, P=0.70); the success rate in the transthoracic closure group was lower than that in the surgical closure group in the cohort study (OR=0.21, 95%CI 0.08 to 0.55, P=0.002). Both results of RCTs and cohort studies showed that compared with surgical closure, transthoracic device closure reduced duration of the operation (RCT MD=–79.38, 95%CI –95.00 to –63.76, P<0.000 01; cohort studyMD=–66.26, 95%CI –71.20 to –61.31, P<0.000 01) and hospital stay (RCTMD=–2.10, 95%CI –2.65 to –1.55, P<0.000 01; cohort studyMD=–3.99, 95%CI –6.03 to –1.94, P=0.000 1), and the patients with blood transfusion (RCT RR= 0.04, 95%CI 0.01 to 0.11, P<0.000 01; cohort studyOR=0.01, 95%CI 0.00 to 0.13, P=0.001). In the transthoracic closure group the risk of postoperative arrhythmia reduced (RCT RR=0.20, 95%CI 0.13 to 0.32, P<0.000 01; cohort studyOR=0.46, 95%CI 0.31 to 0.67, P<0.000 1). In the transthoracic closure group a higher postoperative valvular regurgitation risk in RCT induced (RR=1.45, 95%CI 1.07 to 1.96, P=0.02) and the rate of postoperative valvular regurgitation in cohort study reduced (OR=0.43, 95%CI 0.20 to 0.92, P=0.03). However, there was no statistical difference in postoperative residual shunt (RCT RR=0.96, 95%CI 0.57 to 1.62, P=0.89; cohort study OR=0.52, 95%CI 0.12 to 2.25, P=0.38). Conclusion Transthoracic device closure can shorten duration of the operation, hospital stay and reduce the patients with blood transfusion and post- and intraoperative arrhythmia risk. Therefore, transthoracic device closure may be a better approach for some ventricular septal defect patients.
ObjectiveTo summarize the experiences of minimally invasive occlusion of ventricular septal defect (VSD) via small chest incision. MethodsWe retrospectively analyzed the clinical data of 131 infants with VSD in Hebei children's Hospital between March 2013 and September 2014, including 83 patients with perimembranous VSD, 24 patients with membranous aneurysm and 24 patients with intracristal VSD. There were 63 males and 68 females with a mean age of 35.28±29.22 months and a mean body weight of 14.56±7.47 kg. Before surgery, a multiple-section transthoracic echocardiography (TTE) was employed to evaluate various parameters of the VSD. Under general anesthesia, a small incision was made to expose the right ventricle. Under TEE guidance, proper device was delivered and deployed to close the defect. Patients also received postoperative following-up by transesophageal echocardiogram (TEE) at regular intervals. ResultsOne hundred twenty-nine patients were successfully performed operation. Two patients were converted to perform traditional surgical closure with cardiopulmonary bypass (cPB). concentric devices were used in 52 patients and eccentric devices were used in 77 patients. During the following-up (1-12 months) period, complications occurred in three patients. Massive pericardial effusion appeared and disappeared after pericardicentesis in one patient. The occlusion device was dislocated in the next day after operation and took out by cPB operation in one patient. There was an asymptomatic residual shunt at 1 mm in one patient. ConclusionThe minimally invasive occlusion of VSD via small chest incision is a safe and effective treatment. It should be encouraged to use in the clinical practice.
ObjectiveTo summarize the relationship between preoperative duration of mechanical ventilation and prognosis in patients with ventricular septal defect. MethodsThe clinical data of patients with ventricular septal defect requiring ventilator support preoperatively and undergoing surgical treatment in our hospital from May 2009 to May 2020 were retrospectively reviewed. Based on the duration of preoperative ventilation, the patients were divided into three groups: a group A (0-47 hours), a group B (48-96 hours), and a group C (＞96 hours). Each group's postoperative recovery, complications, and medical costs were analyzed. Results Finally 272 patients were enrolled, including 154 males and 118 females, with a median surgical age of 2 (1, 4) months. There were 43 patients in the group A, 75 patients in the group B, and 154 patients in the group C. Early death occured in 3 (1.3%) patients, all in the group C. No statistical difference in mortality was found among the three groups (P=0.734). The mean postoperative duration of mechanical ventilation in the three groups was 158.6±133.5 hours, 101.2±56.1 hours, and 133.1±97.9 hours, respectively. The group B had significantly shorter duration than the other two groups (P＜0.05). The mean postoperative hospital stay in the three groups was 17.5±9.9 days, 13.5±5.8 days, and 16.5±10.8 days, respectively. Postoperative hospital stay in the group B was significantly shorter than that in the other two groups (P＜0.05). The mean total in-hospital cost in the three groups were 89 000±34 000 yuan, 87 000±21 000 yuan, and 109 000±41 000 yuan, respectively. The costs in the group C were significantly higher than those in the other two groups (P≤0.001). ConclusionPrompt surgical repair is necessary for patients with ventricular septal defects requiring ventilator support preoperatively. However, attention should be paid to surgical timing. Preoperative duration of mechanical ventilation is associated with better surgical outcomes within 48-96 hours than 0-47 hours or ＞96 hours.
Objective To discuss the methods and results of the surgical treatment of apical muscular ventricular septal defects （VSD） , in order to improve the surgical outcome of this disease. Methods The clinical data of 29 patients with apical muscular VSD of Fuwai hospital through Jan. 1999 to July 2004 were analyzed retrospectively. The apical VSDwere repaired via 4 different approaches： right atrium, apical right ventriculotomy, apical left ventriculotomy and the incision of the outflow tract of right ventricle combined with apical left ventriculotomy. The operative outcomes between different approaches were analyzed and compared. Results There were 2 perioperative deaths （6. 9%）. One patient repaired via apical left ventriculotomy died of low cardiac output syndrome, the other died intraoperatively from endocardial fibroelastosis, which was confirmed by myocardial biopsy. There were residual VSD in 4 （13. 8%） patients, who were repaired via the right atrium, which did not necessitate reoperation. Other patients were discharged uneventfully. Follow up was completed {n 11 patients and extended 2 to 34 months, none of the 6 survivors had apical ventricular aneurysms. Conclusions The operative outcome of patients with apical VSD is satisfactory although the incidence of residual VSD is higher. The intraoperative transesophageal echocardiography （TEE） should be performed routinely. Surgical approach should be chosen on the actual site of the VSD at operation. Try to repair the VSD via the right atrium as possible, via the apical right ventrieulotomy if needed and try to avoid left ventriculotomy.
Doubly committed sub-arterial ventricular septal defect (VSD) is a unique type of VSD which is located beneath both the aortic and pulmonary valve. Open-heart repair is traumatic especially for pediatric patient while trans-catheter device closure is also not suitable for this type of VSD. Minimally invasive per-ventricular device closure has been introduced as an alternative method in the treatment of doubly committed VSD with encouraging results. In the review, we will illustrate the surgical technique as well as perioperative management strategy as for this technique in treating doubly committed VSD.