<strong>Background</strong>: Residual aneurysms after graft replacement are rare, but they can be detrimental if they are saccular and large. The etiology of residual aneurysms remains unknown, and their m...<strong>Background</strong>: Residual aneurysms after graft replacement are rare, but they can be detrimental if they are saccular and large. The etiology of residual aneurysms remains unknown, and their management is controversial. One treatment option is late open surgical conversion;however, postoperative respiratory complications resulting from the dissection of pleural adhesions, which is frequently necessary with this approach, are often unavoidable. <strong>Case presentation</strong>: Herein, we report a case of open surgical repair of a residual distal aortic arch aneurysm that occurred after total arch replacement and thoracic endovascular aortic repair. Contrast-enhanced magnetic resonance imaging was not possible in this case due to the patient’s severe renal dysfunction;however, contrast-enhanced computed tomography using minimal contrast did not detect remarkable leakage through the graft or stent graft into the aneurysm. Late open surgical conversion using video-assisted thoracic surgery was performed by thoracic surgeons, and the adhesion between the aortic wall and the lung was safely and effectively dissected. Because there was no significant pulsation or evidence of feeding arteries in the aortic wall, the aortic wall was opened carefully. No bleeding or backflow from any branch arteries into the aneurysm was noted, so the aortic wall was ligated with continuous sutures. The patient recovered without experiencing any major complications. <strong>Conclusions</strong>: This case report demonstrates that video-assisted thoracic surgery is safe and effective for late open conversion in cases of residual aneurysm;furthermore, this case suggests that video-assisted thoracic surgery may be particularly beneficial for the dissection of adhesions between the aortic wall and lung in these cases.展开更多
This paper investigates the preemptive scheduling with release dates on a single machine to minimize the total weighted late work.We firstly present an O(nlogn)-time algorithm for the single-agent problem with disagre...This paper investigates the preemptive scheduling with release dates on a single machine to minimize the total weighted late work.We firstly present an O(nlogn)-time algorithm for the single-agent problem with disagreeable weights and due dates.And then,we extendedly study the two-agent Pareto-scheduling problem with jobs having a common due date to minimize each agent's total weighted late work,and give a polynomial-time algorithm that is based on the parameters analysis to generate the Pareto frontier.展开更多
文摘<strong>Background</strong>: Residual aneurysms after graft replacement are rare, but they can be detrimental if they are saccular and large. The etiology of residual aneurysms remains unknown, and their management is controversial. One treatment option is late open surgical conversion;however, postoperative respiratory complications resulting from the dissection of pleural adhesions, which is frequently necessary with this approach, are often unavoidable. <strong>Case presentation</strong>: Herein, we report a case of open surgical repair of a residual distal aortic arch aneurysm that occurred after total arch replacement and thoracic endovascular aortic repair. Contrast-enhanced magnetic resonance imaging was not possible in this case due to the patient’s severe renal dysfunction;however, contrast-enhanced computed tomography using minimal contrast did not detect remarkable leakage through the graft or stent graft into the aneurysm. Late open surgical conversion using video-assisted thoracic surgery was performed by thoracic surgeons, and the adhesion between the aortic wall and the lung was safely and effectively dissected. Because there was no significant pulsation or evidence of feeding arteries in the aortic wall, the aortic wall was opened carefully. No bleeding or backflow from any branch arteries into the aneurysm was noted, so the aortic wall was ligated with continuous sutures. The patient recovered without experiencing any major complications. <strong>Conclusions</strong>: This case report demonstrates that video-assisted thoracic surgery is safe and effective for late open conversion in cases of residual aneurysm;furthermore, this case suggests that video-assisted thoracic surgery may be particularly beneficial for the dissection of adhesions between the aortic wall and lung in these cases.
基金the National Natural Science Foundation of China(Nos.12071442,11771406,and 11971443).
文摘This paper investigates the preemptive scheduling with release dates on a single machine to minimize the total weighted late work.We firstly present an O(nlogn)-time algorithm for the single-agent problem with disagreeable weights and due dates.And then,we extendedly study the two-agent Pareto-scheduling problem with jobs having a common due date to minimize each agent's total weighted late work,and give a polynomial-time algorithm that is based on the parameters analysis to generate the Pareto frontier.
