debate: fevar is the best option for aortic neck length ......– viva physicians group •...
TRANSCRIPT
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
DEBATE: FEVAR is the best option for aortic neck length < 9mm
FOR the motion
Michael D. Dake, M.D. Thelma and Henry Doelger Professor Department of Cardiothoracic Surgery Stanford University School of Medicine Falk Cardiovascular Research Center
CX @ LINC 2016 Management of short infrarenal aortic necks
Thursday, January 28, 2016
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Michael Dake, MD
• Research/Research Grants, Clinical Trial Support – W. L. Gore (major) – Cook Medical (major)
• Consulting Fees/Honoraria – W. L. Gore – Cook Medical – Abbott Vascular (minor) – Medtronic (minor) – Cardinal Health (minor)
• Equity Interests/Stock Option – TriVascular (minor) – Intact Vascular (minor) – Arsenal (minor) – 480 Medical (minor) – PQ Bypass (minor) – AneuMed (minor)
• Officer, Director, Board Member or other Fiduciary Role – VIVA Physicians Group
• Speaker’s Bureau – None
Within the past 12 months, the presenter or their spouse/partner have had a financial interest/arrangement
or affiliation with the organization listed below.
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
The Case in Favor of the Proposal • Framing the issue – what’s important • Anatomic considerations and real world experience
with traditional stent-graft devices in “short” necks. • The importance of IFUs and what can happen when
we go beyond the limits of testing and regulatory recommendations.
• What do we do when juxta becomes para and existing chimneys become problematic?
• What about new opportunities with EVAS plus chimneys...is this the answer?
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
What have we learned from older generation of endografts?
1. Durability Matters !
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Arch Med Sci 2014; 10, 2: 273–282
50-60% of patients are still Alive at
TEN YEARS
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
What Determines IFU?
Manufacturer Specifications Clinical Trials Device Approvals &
IFU
• Rigorous pre-clinical animal and in vitro testing to simulate specific parameters: neck length, angulation etc…
• Hundreds or thousands of devices tested to failure
• Clinical evidence collected based on tested parameters
• Structured monitoring to ensure credibility of data
• After years of testing and millions of $$, approvals and labeling (IFU) based on evidence from in vitro, animal and clinical testing
When we treat patients on label, we have the weight of years of testing behind us
(and why is it important?)
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The Importance of Instructions for Use (IFU)
“In this multicenter patient population, compliance with published EVAR device IFU guidelines was low, and post-EVAR aneurysm sac enlargement was high…”
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10228 patients (1999-2008) 59% <5.5 cm ! Compliance with EVAR device guidelines was low ! Post EVAR sac enlargement was high " 41% had Sac enlargement @ 5 years " ONLY 42% of EVAR’s had anatomy that fit guidelines
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Some devices can work outside the IFU in selected cases
Beyond IFU: Challenging Neck Anatomy
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
3 years later Migration Occlusion of The right limb Emergency Fem fem Late conversion
Results Not Always Acceptable in Hostile Anatomy
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Chimney/Snorkel grafts
Malina M, et al
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Guiding catheter or sheath positioned just above gutter; micro-catheter advanced into sac via gutter; coils introduced
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Injection of glue or Onyx via microcatheter during its withdrawl out of gutter
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Caution
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Strokes?
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Strokes? 4% to 5% in
published meta-analyses
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1. Commercial Interest: Attempt to gain competitive edge
2. Drive for Lower Complications 3. Improved Performance and Longer Durability 4. Expanding the Applicability of EVAR to
challenging anatomies and New Aortic Segments
Why New Devices?
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Allows Extension over Renal Arteries The Zenith Fenestrated Graft
Custom Made
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
85-year-old woman: Very Short Neck
Type II endoleak treated at 3 years / well at 6 years (92y)
1 month:51 x 55 mm
1 year : 38 x 46 mm
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Times have changed
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J Endovasc Ther. 2014;21:439–447
New Generation Stent Grafts better than old grafts @ 7 Yr for Reinterventions Conversions AAA Growth
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Department of Cardiothoracic Surgery, Stanford University School of Medicine Nellix Endobag System (EVAS)
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Nellix Endobag System (EVAS)
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Department of Cardiothoracic Surgery, Stanford University School of Medicine Nellix EVAS
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Yes, times have changed
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
But Durability Matters
1. Endoleaks 2. Branch occlusion chimneys >
fenestrated 3. Extension of disease – when juxta
morphs into para after initial treatment with standard EVAR/chimney or EVAS/chimney
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
But Durability Matters
1. Endoleaks 2. Branch occlusion chimneys >
fenestrated 3. Extension of disease – when juxta
morphs into para after initial treatment with standard EVAR/chimney or EVAS/chimney
4. Strokes
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Period.
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
End.
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Department of Cardiothoracic Surgery, Stanford University School of Medicine
Thank You