Stent Assisted Balloon Induced Intimal Disruption and Relamination in Aortic Dissection Repair: The STABILISE Concept Sophie C. Hofferberth 1, Andrew E.

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Presentation transcript:

Stent Assisted Balloon Induced Intimal Disruption and Relamination in Aortic Dissection Repair: The STABILISE Concept Sophie C. Hofferberth 1, Andrew E. Newcomb 2, Michael Y. Yii 2, Ian K. Nixon 2, Peter J. Mossop 3 1. Department of Medicine, University of Melbourne (St. Vincent’s) 2. Department of Cardiac Surgery 3. Department of Medical Imaging St. Vincent’s Hospital, Melbourne, Australia

Background Existing endovascular techniques fail to achieve complete repair of the distal thoracoabdominal aorta. Residual FL patency, high velocity re-entry jets and retrograde flow into treated zones increase risk of; -aneurysmal degeneration, rupture, distal reoperation STABLE technique (combined proximal endograft + distal bare metal stenting) -improved rates of aortic remodelling through stent support of distal true lumen -incomplete intimal relamination: >50% patients with residual FL perfusion at midterm FU We evolved STABLE to the STABILISE technique to address the problem of residual FL perfusion

STABILISE CONCEPT OBJECTIVE To achieve complete aortic reconstruction during endovascular AD repair via stent-assisted, balloon induced intimal rupture and relamination; leading to elimination of false lumen perfusion and subsequent prevention of remote phase complications.

Methods April Sept 2011: 27 patients underwent endovascular AD repair Outcomes Measured Clinical: Procedural, 30 Day morbidity/mortality, Intermediate FU Aortic remodelling: CT angiogram assessment: Aortic diameter, TL index, FL perfusion -Thoracic Aorta: Level of Carina -Abdominal Aorta: Level of celiac axis, Renal arteries, Infrarenal STABILISE treatment (n=11) 7 type A, 4 acute Type B Mean age: 50 ± 9 years STABILISE Inclusion Criteria i) Descending thoracoabdominal aortic diameter (distal endograft landing zone) ≤ 40mm ii) Non aneurysmal abdominal aorta with true lumen collapse iii) No evidence of periaortic hematoma / rupture in zone to be stented

STABILISE: Combined Zenith TX2- Zenith Dissection Stent /CODA balloon therapy TX2 Exclusion ZDS Re-lamination CODA Expansion Time from Initial Event to STABILISE Procedure = 4.6 (1-12) days Mean No. devices deployed = 3.3 ± 1.0 Post-Procedure

Operative Technique

Early Outcomes Technical success in all patients: n=11 30 Day mortality: n= 1 (9%) -49 y.o, acute type A AD, presented post-proximal repair -unexpected aortic rupture: autopsy reported localised dehiscence at distal anastomosis site of ascending aortic graft No strokes No spinal cord/limb/visceral ischemia No renal failure No respiratory failure Mean Length Hospital stay: 15 ± 13 days

Aortic Remodelling Carina Celiac Renal Infrarenal

Aortic Remodelling * * * *p<0.01 Pre-Operative Latest Follow up 3 months Ti = TL/AD False Lumen status TA (%)AA (%) Latest FU Obliterated/ Thrombosis Partial Thrombosis 09 Patent00 True Lumen Reconstitution Fate of False Lumen

Intermediate Clinical Outcomes Mean follow-up 18 months (range, 4-54) Aortic-specific survival: 91% 2 patients required secondary endovascular reintervention - patient 1: type 1 endoleak treated 8 days post primary procedure -patient 2: type 1 endoleak, resolved at 1 month CTA No late cardiovascular events No late aortic-related deaths

Pre Repair Post STABILISE Repair Intermediate Radiological Outcomes

Conclusions STABILISE is safe and technically feasible Achieves very high rates of false lumen obliteration in aortic dissection Prevents thoracoabdominal aortic growth at intermediate follow up May reduce need for future reintervention as complete aortic remodelling is achieved in acute setting