Computational Fluid Analysis of Blood Flow Characteristics in Abdominal Aortic Aneurysms Treated with Suprarenal Endovascular Grafts

2009 ◽  
pp. 1728-1732
Author(s):  
Zhonghua Sun ◽  
Thanapong Chaichana ◽  
Manas Sangworasil ◽  
Supan Tungjitkusolmun
Keyword(s):  
Blood Flow ◽  
Flow Characteristics ◽  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Fluid Analysis ◽  
Abdominal Aortic ◽  
Endovascular Grafts

scholarly journals Cardiac complications and their prevention in surgery of infrarenal abdominal aortic aneurysms

2015 ◽  
Vol 17 (1) ◽  
pp. 79
Author(s):  
A. A. Karpenko ◽  
A. M. Chernyavskiy ◽  
N. R. Rakhmetov ◽  
A. A. Dyusupov ◽  
Ye. O. Masalimov ◽  
...  
Keyword(s):  
Blood Flow ◽  
Surgical Treatment ◽  
Endovascular Repair ◽  
Open Surgery ◽  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Surgical Correction ◽  
Cardiac Complications ◽  
Abdominal Aortic

We analyzed the data of surgical treatment of 225 patients with infrarenal abdominal aortic aneurysms (AAA) obtained over a period from 1998 to 2012. Depending on the tactics and methods of surgical treatment, the patients were divided into 3 groups. Group 1 included 79 patients (35,2%), who underwent open surgery for AAA with therapeutic correction of combined pathology in the blood pool of the heart. Group 2 had 118 patients (52,4%), who underwent first surgical correction of the arterial bed of the heart and then open surgery for AAA. 28 patients of Group 3 (12,4 %) also underwent first surgical correction in the arterial bed area followed, however, by endovascular repair of AAA. Preliminary surgical correction of the coronary blood flow abnormalities followed by open surgery of AAA allowed to reduce the number of myocardial infarctions in the early postoperative period from 10,1 % to 1,7% and from 12,5% to 1,3% in the long-term period, to reliably reduce perioperative mortality from 10,1% to 0,8% and to improve the actuarial 5-year survival from 77,5% to 91,3%. The absence of cardiac complications after preliminary surgical correction of the coronary blood flow and endovascular repair of AAA both during early and long-term follow-up is indicative of the benefits of this tactic, especially for the elderly with multiple co-morbidities.

Forces Induced by Peak Systolic Flows in Asymmetric Endovascular Grafts

2003 ◽  
Author(s):  
Ender A. Finol ◽  
Cristina H. Amon
Keyword(s):  
Blood Circulation ◽  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Short Term ◽  
Abdominal Aortic ◽  
Endovascular Grafts ◽  
Incomplete Occlusion ◽  
Analytical Tools ◽  
Graft Migration

Endovascular repair (EVAR) has emerged as an alternative, less-invasive surgical technique for the treatment of patients diagnosed with abdominal aortic aneurysms (AAAs). The anatomical pathway of blood flow in the abdominal aorta is restored by the implantation of an endovascular graft (EVG), effectively depressurizing the aneurysm and initiating a remodeling process of the diseased aorta. The short-term results of endovascular grafting are promising, but its long-term success has been compromised by the occurrence of graft migration and detachment, which induce endoleaks or incomplete occlusion of the aneurysm from the blood circulation. The forces induced by the blood as it flows through the graft are believed to be a factor of probable cause in the partial detachment from its proximal and distal anchoring points and the migration of the graft downstream. The purpose of this study is to utilize analytical tools to provide an estimation of the forces required to secure the graft proximally when relying only on stresses induced by the flow.

A COMPUTATIONAL MODEL OF BLOOD FLOW AND AORTIC WALL STRESS IN ABDOMINAL AORTIC ANEURYSMS

ASAIO Journal ◽  
1999 ◽  
Vol 45 (2) ◽  
pp. 197
Author(s):  
P J Cabrales ◽  
J E Gómez ◽  
J Camacho ◽  
C Espinel ◽  
J C Briceño
Keyword(s):  
Blood Flow ◽  
Computational Model ◽  
Aortic Wall ◽  
Wall Stress ◽  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Abdominal Aortic

Adenosine-Induced Transient Cardiac Asystole Enhances Precise Deployment of Stent-Grafts in the Thoracic or Abdominal Aorta

1996 ◽  
Vol 3 (3) ◽  
pp. 270-272 ◽  
Author(s):  
Gerald Dorros ◽  
Joel M. Conn
Keyword(s):  
Blood Flow ◽  
Aortic Aneurysm ◽  
Abdominal Aorta ◽  
Endovascular Repair ◽  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Aortic Flow ◽  
Stent Grafts ◽  
Abdominal Aortic ◽  
Second Period

Purpose: To present a cardiac asystole technique that assists in the accurate deployment of stent-grafts during endovascular repair of thoracic or abdominal aortic aneurysms. Technique: In the anesthetized patient, trial doses of intravenous adenosine are delivered until a ≥ 20-second period of asystole is recorded. The endograft procedure then proceeds until the device is ready for deployment. The predetermined dose of adenosine is administered, and the device is deployed during asystole. Adenosine-induced transient asystole has been utilized in 16 patients undergoing balloon-expandable endograft exclusion of 6 thoracic aortic and 10 abdominal aortic aneurysms. Asystole lasted for 20 to 30 seconds, during which time the devices were accurately deployed without interference from the aortic flow. There were no clinical sequelae of this technique in any patient. Conclusions: Pharmacologically induced transient asystole appears to be a safe maneuver to preclude endograft movement by systolic blood flow. The technique permits precise placement of balloon-expandable stent-grafts and is applicable to self-expanding devices as well. Interventionists may wish to incorporate adenosine-induced asystole into their aortic aneurysm exclusion procedures.

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