Obstruction in Modified Blalock Shunts: A Quantitative Analysis With Clinical Correlation (original) (raw)
Related papers
Bali Medical Journal, 2021
Background: Modified Blalock-Taussig shunt (MBTS) is a common palliative procedure for congenital heart defect to connect the systemic to the pulmonary circulation via a synthetic shunt from a subclavian artery to a pulmonary artery. However, certain postoperative complications do exist, such as blockage. Early identification of modifiable risk factors is important to prompt early intervention for better outcomes. Material: This article is a descriptive narrative retrospective study. We gather data from the Cipto Mangunkusumo Hospital Cardiovascular Center medical report of 8 patients having undergone reoperation post-MBTS surgery as their first operation between January 2018 and October 2020. Data were analyzed using SPSS version 20 for Windows. Results: The patient's age ranged from 3 months to 30 years old. Seven of them suffered from shunt occlusion complications, while the other suffered from the bleeding problem. The laboratory results showed that preoperative hemoglobin (18.9±4.1 g/dL vs. 16.90 (10.80-19.20) g/dL), hematocrit (58.8±12.40% vs. 42.9±14.30%), platelet counts (284.487±147.003 vs. 210.625±104.688) 10 3 /uL, and oxygen saturation (86.00 (75.00-89.00) vs. 70.00±17.00) levels were higher than the prereoperative. The coagulation markers showed that PT value has increasing trend (1.10 (0.90-2.30) vs. 1.30±0.20) while aPTT (5.90 (2.90-6.30) vs. 2.30 (1.60-5.30)) seconds and activated clotting time (ACT) (205.00±86.00 vs. 165.00 (114.00-255.00)) showed the opposite. Conclusion: MBTS remains the first-choice bridging palliation surgery to increase the pulmonary blood flow in congenital heart defects. The cause of shunt failure remains inconclusive in this study. Other studies suggest that graft material choice, S/PA ratio, S/W ratio, operative approach, thrombus formation, and aPTT value contribute to shunt failure, thus needing a reoperation.
The Annals of Thoracic Surgery, 1980
Thirty-six of 87 modified Blalock-Taussig shunts done with expanded polytetrafluoroethylene (Gore-Tex) were restudied angiocardiographically. In 7 patients the study was carried out within 1 month of the shunt operation because the patients failed to make satisfactory clinical progress. Two shunts were occluded and 1 was stenosed; all 3 were in neonates. The remaining 29 iatients were reinvestigated electively between 5 and 29 months postoperatively and had a 97% shunt patency rate. Because of the rather high incidence of irregular or stenosed shunts among neonates with 4 mm conduits, we now prefer to use a larger conduit even in this age group.
Age Criteria As Operative Mortality Predictor After Modified Blalock-Taussig Shunt
Indonesian Journal of Cardiology
Background: Modified Blalock-Taussig shunt (MBTS) is considered as a simple procedure but has a considerable operative mortality rate. Patient’s characteristics who underwent MBTS in Indonesia is quite different than other country. There was no predictor of operative mortality has been identified in Indonesian.Objectives: To compare mortality rate based on age criteria and to identify mortality and morbidity predictors after MBTS procedure.Methods: A retrospectively cohort study was conducted on 400 patients who underwent MBTS at National cardiovascular center Harapan Kita (NCCHK) between January 2013 and december 2017.Results: There were 32,1% death at age ≤ 28 days, 19,9% at age 29-365 days, 3,6% at age 366-1825 days and 8% at age > 1825 days. Body weight < 3 kg, haematocrite level > 45% before procedure and activated partial thromboplastine time level (aPTT) < 60 seconds were operative mortality predictors. Postoperative morbidity rate was 32,9%. Packed red cell tra...
Modified Blalock-Taussig Shunt in Palliative Cardiac Surgery
East and Central African Journal of Surgery, 2007
Background: Cyanotic congenital heart diseases present early in life with poor general condition of the patient. Majority of deaths occurs within one year of life before surgical intervention due to severe cyanosis and metabolic acidosis. Modified Blalock-Taussig Shunt (MBTS) is one of the palliative cardiac surgeries done for cyanotic congenital heart diseases. It improves the general condition of the patient before definitive surgery is done. The aim of this study was to determine the commonest indications, post-operative anticoagulation and early complications following MBTS at CARE Hospital, India. Methods: This was a retrospective study from January 2004 to December 2006 including all patients who underwent Posterolateral Thoracotomy for MBTS. All patients had deep cyanosis, oxygen saturation of 65% or less and small pulmonary vasculature due to congenital heart defects. Acyanotic patients and those with oxygen saturation more than 65% were excluded from the study. All patients received a single dose of heparin intra-operatively and oral aspirin as anticoagulant regimen post-operatively. No heparin given postoperatively. Results: A total of 20 children with a mean age of 27.4 months were studied. Two patients had pre-operative ICU admission due to severe cyanosis (both had oxygen saturation of 35%), hypotension and severe body weakness. The commonest indications for MBTS included Tetralogy of Fallot (70%), pulmonary atresia (10%) with or without Ventricular Septal Defect (VSD), tricuspid atresia (10%) with pulmonary atresia or stenosis and Double Outlet Right Ventricle (DOVR) with pulmonary atresia or stenosis (10%). Mean duration of ICU stay was 2 days, mean duration of mechanical ventilation was four and half hours, mean duration of hospital stay was 7 days and mean systemic oxygen saturation improved significantly from 46% to 84% (x 2 = 7.03, p = 0.0080). No post-operative bleeding, seroma, shunt thrombosis or death occurred in this study. Conclusion: The commonest indication for MBTS is TOF. Intra-operative single dose of heparin followed by post-operative oral aspirin as anticoagulant regimen was not associated with a major complication in terms of bleeding, seroma, shunt thrombosis, or death.
Australian and New Zealand Journal of Surgery, 2008
The long term morbidity and mortality of two consecutive groups of patients undergoing successful shunt surgery for bleeding oesophageal varices has been studied. Twenty-seven patients with a non-selective shunt in the form of a mesocaval Dacron 'H' graft and 21 patients with selective variceal decompression via a distal lienorenal shunt, all of whom had a patent shunt on discharge from hospital, were included in the study. Shunt associated encephalopathy was documented in 77% of the patients following mesocaval shunts and only 19% of patients following distal lienorenal surgery. Other postoperative morbidity was largely related to problems with the synthetic Dacron graft. Late shunt blockage, often resulting in recurrent variceal bleeding, was documented in 25% of these patients and shunt infection was responsible for complicating fatal disseminated sepsis in 18.5%.
Revision and complication rates in adult shunt surgery: a single-institution study
Acta Neurochirurgica, 2020
Background CSF diversion with shunt placement is frequently associated with need for later revisions as well as surgical complications. We sought to review revision and complication rates following ventriculoperitoneal, ventriculoatrial and cystoperitoneal shunt placement in adult patients, and to identify potential risk factors for revision surgery and postoperative complications. Method Included patients were adults (≥ 18 years) who underwent primary shunt insertion at St. Olavs Hospital in Trondheim, Norway, from 2008 through 2017. The electronic medical records and diagnostic imaging from all hospitals in our catchment area were retrospectively reviewed. Follow-up ranged from 1 to 11 years. Complications were graded according to the Landriel Ibañez classification system. Results Of the 227 patients included, 47 patients (20.7%) required revision surgery during the follow-up. In total, 90 revision surgeries were performed during follow-up. The most common cause for the first revi...
Stent implantation to maintain patency of a stenosed Blalock Taussig shunt
Asian cardiovascular & thoracic annals, 2005
A 14-year-old female with complex congenital heart disease underwent a left-sided classical Blalock Taussig (BT) shunt 15 days after birth. Ten years after the operation her oxygen saturation had decreased significantly. An angiography revealed a severely stenosed BT shunt. Balloon dilation including implantation of a 6 x 13 mm stent was performed successfully. Immediately after intervention, oxygen saturation rose from 55% to 80 84% in room air. Follow-up at a year and a half later showed the classical BT shunt was still patent.
Does the shunt type determine mid-term outcome after Norwood operation?
European Journal of Cardio-Thoracic Surgery, 2012
OBJECTIVES: With improved short-term outcomes the right ventricular to pulmonary artery shunt (Sano) has become the preferred pulmonary blood source in the Norwood procedure in many centres. However, most studies analysed consecutive cohorts, with a first modified Blalock-Taussig shunt (BT) followed by the Sano cohort. Besides, neither comprehensive preoperative risk analysis nor outcome beyond 1 year of age was investigated.
Two Thousand Blalock-Taussig Shunts: A Six-Decade Experience
Annals of Thoracic Surgery, 2007
Background. The Blalock-Taussig shunt (BTS) remains valuable for palliation of congenital heart disease, but its role has evolved. We reviewed our total institutional experience with BTS to examine changes in its use and outcomes.