• Journal of Chest Surgery
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• 제21권1호
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• pp.10-16
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• 1988

Ten patients with tetralogy of Fallot were studied angiocardiographically before a modified Blalock-Taussig shunt and again 25*3.2 months after the previous shunt. All of ten patients had patent previous shunt at the time of follow up examination. Pre-and postoperative diameters of left and right pulmonary artery and descending aorta were measured and pulmonary artery index [the sum of the crossectional areas of the right and left pulmonary arteries standardized by the body surface area] was calculated. The ratio of mean diameter of left and right pulmonary arteries to the diameter of the descending aorta [LPA+RPA/2xDA] was increased postoperatively by 0.20*0.068 [p=0.020]. Mean PAI [pulmonary artery index] increased from 283.8*178.4 mm/m2 BSA to 345.8~144.5 mm/m2 BSA after shunt operation [p=0.019]. This results suggested that the modified Blalock-Taussig shunt was effective to help growth of the pulmonary arteries in most cases of the study populations but the ones with the PAI>233mm*/m* BSA appeared less benefited by Blalock Taussig shunt. Calculation of PAI could be an aid to making a decision whether to perform a one stage corrective surgical procedure or a palliative shunt procedure in the patient with small pulmonary arteries.

• Journal of Chest Surgery
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• 제21권1호
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• pp.136-142
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• 1988

Between February, 1983, and March, 1987, thirty-one systemic-pulmonary shunts were performed in 28 patients with cyanotic congenital heart disease. Age ranged from 8 months to 28 years [mean age, 5.4 years, Weight ranged from 7 kg to 48 kg [mean weight, 16kg]. There were 4 classic Blalock-Taussig shunts, 5 central polytetrafluoroethylene shunts, 1 aorta-right pulmonary artery shunt with graft, and 21 modified Blalock-Taussig shunts. One patient required another shunt immediately due to insufficient pulmonary blood flow with patent graft. There was no postoperative death. Conduit diameters included 4mm [2 cases], 5 mm [22 cases], and 6 mm [3 cases]. Long term follow up was available in 27 patients [96.4%] with mean period of 20 months [range, 4 months to 49 months]. The effectiveness of shunt was evaluated by cardiac catheterization with angiography [15 patients] or clinically. They showed improvement of systemic oxygen saturation values by 12% and decrease of hemoglobin by 2.3gm/dl [P<0.01]. There were 2 shunt occlusion in central shunts at 32 and 48 months respectively, and one narrowing of graft in modified Blalock-Taussig shunt at 12 months. The patency rate was 91.6% at 24 months for 5 mm grafts in modified Blalock-Taussig shunt.

• Journal of Chest Surgery
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• 제57권3호
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• pp.231-239
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• 2024

Background: Although the modified Blalock-Taussig shunt remains the mainstay method of palliation for augmenting pulmonary blood flow in various congenital heart diseases, the shunt must be carefully designed to achieve the best outcomes. This study investigated the effect of shunt configuration on pulmonary artery growth and growth discrepancy. Methods: Twenty patients with successful modified Blalock-Taussig shunt takedown were analyzed. Pulmonary artery and shunt characteristics were obtained using computed tomography scans. Differences in the baseline and follow-up diameter ratios and growth in the ipsilateral and contralateral arteries were calculated. The angle between the shunt and pulmonary artery, as well as the distance from the main pulmonary artery bifurcation, were measured. Correlations between pulmonary arteries and shunt configurations were analyzed. Results: The median interval time between shunt placement and takedown was 154.5 days (interquartile range, 113.25-276.25 days). Follow-up values of the ipsilateral-to-contralateral pulmonary artery diameter ratio showed no significant correlation with the shunt angle (ρ=0.429, p=0.126) or distance (ρ=0.110, p=0.645). The shunt angle and distance from the main pulmonary bifurcation showed no significant correlation (ρ=-0.373, p=0.189). Pulmonary artery growth was negatively correlated with shunt angle (ipsilateral, ρ=-0.565 and p=0.035; contralateral, ρ=-0.578 and p=0.030), but not with distance (ipsilateral, ρ=-0.065 and p=0.786; contralateral, ρ=-0.130 and p=0.586). Conclusion: Shunt configuration had no significant effect on growth imbalance. The angle and distance of the shunt showed no significant correlation with each other. A more vertical shunt was associated with significant pulmonary artery growth. We suggest a more vertical graft design for improved pulmonary artery growth.

• Journal of Chest Surgery
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• 제28권11호
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• pp.983-988
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• 1995

From January 1983 to December 1994, 48 cyanotic patients were underwent a subclavian artery-pulmonary artery shunt using polytetrafluoroethylene[PTFE for the purpose of improvement of reduced pulmonary blood flow. The diameters of the PTFE used were 4mm[4 cases , 5mm[36 cases , and 6mm[8 cases sizes. The effectiveness of modified Blalock-Taussig shunts was evaluated clinically and angiographically. There were 5 early deaths and 2 late deaths. There were 3 early shunt failures and 5 late shunt failures. The overall graft patency rate was 83.3%. Postoperative hemoglobin was reduced significantly[p = 0.0011 in comparison of the preoperative and postoperative hemoglobin, SaO2, PaO2, and cardiothoracic ratio.

• Journal of Chest Surgery
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• 제22권2호
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• pp.256-264
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• 1989

Modified Blalock-Taussig operation remains the standard technique of systemic-to-pulmonary artery shunt in patients of congenital heart disease with decreased pulmonary blood flow. We reviewed the 41 patients who had been performed modified Blalock-Taussig operation from March 1985 to Feb. 1988, and angiographically measured pulmonary artery size before and after shunt, and calculated pulmonary artery index [PAI] and ratio of left and right pulmonary artery to descending aorta[[LPA+RPA]/dAo]. The mean duration of palliation after shunt operation was 624 days and mean age of the patient at shunt operation was 3.59 years. Mean PAI increased significantly from 131.15*67.11 mm2/M2 preoperatively to 232.70*84.46 mm2/M2 postoperatively. Mean ratio of right and left pulmonary artery to descending aorta also increased significantly from 1.48*0.40 preoperatively to 1.92*0.50 postoperatively. All patients manifested clinical improvement; there was mean decrease in hematocrit of 8.95%, mean increase in arterial oxygen saturation of 11.08%. Pulmonary arterial growth was not influenced by age at operation, initial pulmonary artery size, or graft size, but significantly influenced by antegrade flow. The patients who have some antegrade flow were in more increase of PAI. There were no linear correlation between change of PAI, change of [[LPA+RPA]/dAo], SaO2, and duration. But, according to Scatterplot between change of PAI and duration, some complex correlation was suggested and mean PAI was decreased after 2-year palliation. We concluded that modified Blalock-Taussig operation is excellent palliative surgery for pulmonary artery growth especially on the patient who have some antegrade flow, and the proper duration of palliation was about 2 years.

• Journal of Chest Surgery
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• 제21권1호
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• pp.55-61
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• 1988

This report provides follow-up data on 116 patients with congenital cyanotic heart disease, aging 1 month to 13 years [median: 1.8 years], who underwent the modified Blalock-Taussig shunt using polytetrafluoroethylene graft at Seoul National University Hospital between September, 1984 and June, 1987. Among 116 patients complete follow-up studies were done on 95 patients. The mean preoperative arterial oxygen tension was 36 torr. Thirty-Six patients [38%] underwent operation in infancy. Conduit diameters included 4mm [15 cases], 5mm [47 cases], and 6mm [33 cases] sizes. The mean postoperative arterial oxygen tension was 52 torr [P<0.001]. The effectiveness of shunts was evaluated clinically and by shunt murmur, echocardiography and cardiac catheterization with angiography 1 to 31 months after operation. The incidence of shunt occlusion was 9.5% and the mortality was 14.8%. The actuarial patency rate was 83.1 * 6.4% and the actuarial survival rate was 82.5 * 4.5% at 30 months` follow-up for all patients. The effectiveness of the 4mm diameter conduit may be limited. Blalock-Taussig procedure is an effective alternative to the classic B-T shunt in congenital cyanotic heart disease.

• Journal of Chest Surgery
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• 제38권5호
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• pp.335-348
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• 2005

배경: 조기 영아기에 변형 Blalock-Taussig 단락술을 시행받은 복합 심기형 환자들을 대상으로 술 전상태, 술 후 경과, 사망률과 사망원인을 고찰하였다. 대상 및 방법: 2000년 1월부터 2003년 11월까지 조기 영아기에 변형 Blalock-Taussig 단락술을 시행받은 복합 심기형 환자 58명을 연구 대상으로 하였다. 수술 당시 환자들의 평균 연령은 $23.1\pm16.2$일($5\~1$일)이었고, 평균 체중은 $3.4\pm0.7\;kg\;(2.1\~4.3kg)$이었다. 진단은 심실중격결손을 동반한 폐동맥 폐쇄가 12예($20.7\%$), 심실중격이 온전한 폐동맥 폐쇄가 17예($29.3\%$), 단심실이 18예($31.0\%$), 좌측심장형성부전이 11예($19.0\%$)였다. 4예의 총폐정맥연결이상증이 단심실에 동반되었다. 결과: 조기 사망은 11예($19.0\%$)로, 사인은 저심박출증 9예, 부정맥 1예, 다장기부전이 1예였다. 만기 사망은 5예($10.9\%$)로, 사인은 폐렴 2예, 저산소증 1예, 패혈증이 1예였다. 단락술 후 사망에 관여하는 유의한 인자는 술 전 폐동맥 고혈압, 술 전 대사성산증, 술 중 심폐우회술의 이용, 좌측심장형성부전과 총폐정맥연결이상증이었다. 술 후 48시간 동안 24명($41.4\%$)의 환자에서 혈역학적인 불안정성을 보였다. 단락폐쇄에 의한 재수술이 6예, 폐혈류과다에 의한 단락분리술이 1예에서 시행되었다. 걸론: 조기 영아기에 변형 Blalock-Taussig 단락술을 시행받은 복합 심기형 환자들은 고위험군을 제외하면 생존률 및 술 후 경과 측면에서 만족할 만한 결과를 보였다. 수술 직후 많은 환자들에서 혈역학적인 불안정성 시기가 있으므로, 지속적인 집중 관찰 및 치료가 필요하다. 고위험군에 대해서는 단락술 후의 혈역학적 변화에 대한 이해를 바탕으로 한 적극적인 술 후 관리가 필요하다.

• Journal of Chest Surgery
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• 제28권8호
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• pp.754-758
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• 1995

Between February 1987 and April 1994,30 modified Blalock- Taussing shunts[MBTS were carried out at the Department of Thoracic and Cardiovascular Surgery of the Keimyung University Dongsan Medical Center.The operation consists of interposing between the subclavian artery and the pulmonary artery a polytetrafluoroethylene graft.There were 19 boys and 11 girls.The average age at the time of shunt construction was 14 months [range 4 days to 5 years .Seventy-six percent [23/30 were less than 1 year of age.Cardiac defects treated with MBTS included tetralogy of Fallot[10 , pulmonary atresia with ventricular septal defect[8 , pulmonary atresia with intact ventricular septum[4 , uni-ventricular heart[3 , and other complex cardiac anomalies[5 .Prosthesis of 4mm were used in 13 cases, and 5mm in 17.Of the 30 operations, 21 were performed on the right side and 9 on the left side.The hemoglobin level decreased from 21.1 gm/dl preoperatively to 16.3 gm/dl postoperatively and systemic oxygen saturation level increased from 60.5 % preoperatively to 85.4 % postoperatively.In the 30 patients who recieved MBTS, there were one early [3% and three late deaths [10% .Seven patients have had an corrective operation and two patient required second palliative procedure.The remaining patients are awaiting further operation with ingestion of aspirin [5 mg/kg/day as an antiplatelet agent.These results indicate that the MBTS provide excellent palliation at a low operative mortality for most patients.

• Journal of Chest Surgery
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• 제30권4호
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• pp.378-382
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• 1997

쇄골하동맥과 폐동맥 사이 에 PTFE 인조혈관으로 연결하는 변형 Blalock-Taussig 문합술은 청색증 심 기 형 환자에 탁월한 고식적 보존 술식으로서 신생 아에서도 적절한 폐혈류를 공급하는 방법이다. 신생아 에서 변형 Blalock-Taussig문합술의 효과와 위험 요소를 평가하기 위하여 본 교실에서는 1991년 12월부 터 1996년 2월까지 본 동아대병원 흉부외과에서 수술받은 21명의 신생아를 대상으로후향성 조사를하 여 수술 사망율, 단락 개존율, 술후 폐동맥 이상 유무 등을 분석하였다. 수술시 환아들의 연령은 1일에서 30일 사이로 평균 11.7일이었다. 몸무게는 2.4 kg에서 4.5 kg으로 평균 3.1 kg이었다. 주된 병변은 활롯씨 사증후군이 11 례, 폐동맥협착이 있는 단일심 형태가 10례였다. 술 전 Prostaglandin E1 의 지속적 투여가 필요한 환아는 13 명이었다. 술전 평균 말초산소포화도 30. ImmHg 에서 술후 46.2mmHg 로 상승되었다. 단락술은 좌측 개흉술로 11 례가 시행되었고 나머지 10 례는 우측 개흉술로 시행되었다. 사용된 PTFE 인조혈관의 크기는 15 례에서 직경 5 mm를, 나머지 6 례에서 직경 4 mmHg를 사용하였다. 조기 단락 폐쇄율은9.5%(2례)로이\ulcorner은다조기 사망하였다. 통 계학적 검증(Fisher's exact test)에 의하여 위 험 요소를 분석한 결과 몸무개 2.6 kg 이하(p=0.021), 폐동맥 직경 3 mm 이하(p=0.008), 인조혈관 직경 4 mm사용한 경우(p=0.021)등이 조기 단락 실패 및 사망의 위험 요소로 나타났다. 생존한 19 명을 평균 11.3 개월간 추적 조사한 결과 단락 폐쇄는 없었고 이중 10 명에서 심도자 및 폐혈관 조영술을 시행한 결과 폐동맥의 변형은 관찰되지 않았다. 이상의 결과 변형 Blalock-Taussig단락술은 신생아에서 청색증 심기형의 보존 요법으로 비교적 안전하 게 사용할 수 있는 술식으로 사료된다.

• Journal of Chest Surgery
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• 제23권1호
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• pp.49-60
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• 1990

Between Jan. 1962 and Dec. 1988 380 cases of palliative operations were done in 357 patients for congenital heart disease. These includes 55 cases of classic Blalock-Taussig shunt, 212 cases of modified Blalock-Taussig shunt, 17 cases of Glenn shunt, 26 cases of Waterston shunt, 3 cases of Brock procedure, 33 cases of pulmonary artery banding, 6 cases of transpulmonary valvotomy, 4 cases of unifocalization, and 10 cases of open atrial septectomy. We divided the operative procedures into the conventional and the unconventional. Under the unconventional procedures, the cases since April, 1986 were only included. The number of patients who died within the early 30 days after operation is the following: 40 in systemic-pulmonary shunts, 2 in Brock procedure, 12 in PAB, 15 in unconventional procedures. The age of the patients who need palliative operation is lowering more and more and their characteristics of the disease is being transferred to the more complexities. So the role of palliative surgery in the congenital heart disease is changing.