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Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging,
and Data to Date
Piotr Musialek, MD DPhil
Jagiellonian University Dept. of Cardiac & Vascular Diseases
John Paul II Hospital, Krakow, Poland
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Disclosure Statement of Financial Interest
• Grant/Research Support
• Consulting Fees/Honoraria
• ABBOTT
• ABBOTT, Balton, InspireMD, Medtronic
Within the past 12 months, I or my spouse/partner have had a financial
interest/arrangement or affiliation with the organization(s) listed below.
Affiliation/Financial Relationship Company
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Rationale
P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
CAS (and CEA) are –and will remain–
emboli-generating procedures
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P. Musialek @ TCT 2015
Δ
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2/3CAS neuro
events(stroke, TIA)are POST-procedural
n = 3179 consecutive CAS patients
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
FREE CELL AREA drives CAS neurologic adverse events( and majority occur post-procedure )
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P. Musialek @ TCT 2015J. Schofer, P. Musialek et al. TCT 2014
Conventional Carotid Stent
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Conventional Carotid Stent
P. Musialek @ TCT 2015
Image Courtesy Dr Juan Rigla, MD PhDPerceptual Imaging Lab, Univerity of Barcelona
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P. Musialek @ TCT 2015
current best-in-classHybrid stent
current best-in-classClosed-cell stent
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P. Musialek @ TCT 2015
ANY data
on incidence of
PLAQUE PROLAPSE
in
conventional carotid stents ?
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
Post-procedural PLAQUE PROLAPSE through conventional stent struts
De Donato et al. Eur J Vasc Endovasc Surg 2013;45:579-587.
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Conventional Carotid Stent
P. Musialek @ TCT 2015
Image Courtesy Dr Juan Rigla, MD PhDPerceptual Imaging Lab, Univerity of Barcelona
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P. Musialek @ TCT 2015J. Schofer, P. Musialek et al. TCT 2014
Conventional Carotid Stent
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P. Musialek @ TCT 2015
CREST
30 d
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P. Musialek @ TCT 2015
CRESTCREST
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P. Musialek @ TCT 2015
CRESTCREST
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P. Musialek @ TCT 2015
CRESTCREST
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P. Musialek @ TCT 2015
CRESTCREST
2015
we need to do better
+
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P. Musialek @ TCT 2015J. Schofer, P. Musialek et al. TCT 2014
Conventional Carotid Stent
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P. Musialek @ TCT 2015J. Schofer, P. Musialek et al. TCT 2014
Anti - Embolic Carotid Stent
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Device Designs
P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
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Device Designs
P. Musialek @ TCT 2015
n=3
Mesh-Covered Stents for Carotid Intervention
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Table by Terumo, used with permission
”Mesh” Stents
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P. Musialek @ TCT 2015
RoadSaver
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P. Musialek @ TCT 2015
RoadSaver
Casper
=
*Not available in the United States.
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P. Musialek @ TCT 2015
RoadSaver (Terumo) = Casper (MicroVena)
nitinol mesh INSIDE the nitinol frame
Images by Terumo / used with permission
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P. Musialek @ TCT 2015Images courtesy P. Pieniazek / Krakow and Terumo
RoadSaver: Push-Pull Stent Delivery System
re-sheathable up to 50% stent length release
CE Mark – January 2014
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P. Musialek @ TCT 2015
Open Cell NiTi Frame
Closed Cell 500 µm PTFE lattice on
outside of NiTi Frame
Permanently Bound CBAS Heparin on
all device surfaces
GORE® Carotid Stent
Courtesy WL Gore & Associates / by permission
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NB. The Gore carotid stent is not avialable outside the SCAFFOLD Study
Table by WL Gore & Associates / used with permission
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
The Gore Stent Delivery System
Hypotube(2.4 Fr)
Handle
Hub
Stent/Sheath(5Fr or 6Fr)
Attributes•Single handed delivery
•5Fr Introducer Sheath Compatible (White Tip)
•6Fr Introducer Sheath Compatible (Gray Tip)
•Hypotube Design
– Allows for complete closure of hemostatic valve
•135 cm Working Length
•30 cm Rx
RO Markers
NB. The Gore carotid stent is not avialable outside the SCAFFOLD Study
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P. Musialek @ TCT 2015*Not available in the United States; available in Europe and a number of other geographies
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P. Musialek @ TCT 2015
CGuard™ Embolic Prevention
Stent System
CE Mark – March 2014
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P. Musialek @ TCT 2015
CGuard™ Embolic Prevention
Stent System
Rx porttip
Images by InspireMD, used with permission
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P. Musialek @ TCT 2015
Pore Size
CGUARD™
ROADSAVER=CASPER
*165µm 375µm 500µm
1050µm 1900µmClosed cell stent Open cell stent
* Average in lesion at expanded state
GORE
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P. Musialek @ TCT 2015
Mesh position in re--lation to frame
Mesh material
Pore size
Stent frameclosed-cellNitinol
open-cellNitinol
open-cellNitinol
inside outside outside
Nitinol PTFE PET
PET = poliethylenteraphtalatPTFE = Polytetrafluoroethylene
Mesh structure braided inter-woven single-fiber knitted
375 µm 500 µm 150 - 180 µm
NameRoadSaveraka Casper
Gore®Carotid Stent
CGuard™Embolic Prevention Stent
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Datahistology / animal
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015PA Schneider VERVE 2014, animal data WL Gore / by permission
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P. Musialek @ TCT 2015
Histology and REM
after 6 months
Data by Terumo / used with permission
RoadSaver
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CGuard EPS 90 days / pig
InspireMD data / by permission
P. Musialek @ TCT 2015
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CGuard EPS 30 & 90 days/pig
P. Musialek @ TCT 2015
BMS = non mesh-covered CGuard nitynol frame; InspireMD data / used with permission
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Imagingangio
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
Roadsaver / Casper
Angio/CAS images courtesy P. Pieniazek / Krakow
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Gore Carotid Stent
Angio/CAS images courtesy Dr. C. SchönholzP. Musialek @ TCT 2015
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CGuard™ EPS
Angio/CAS images P. MusialekP. Musialek @ TCT 2015
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ImagingIVUS
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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ImagingOCT
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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Courtesy of Dr. Max Amor, Essey les Nancy
RoadSaver
Data by Terumo / used with permissionP. Musialek @ TCT 2015
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CGuard™ EPS
Thrombotic material
T R A P P E D
between the stentMicroNET
and the vessel wall
Image Courtesy Dr Juan Rigla, MD PhDPerceptual Imaging Lab, Univerity of Barcelona P. Musialek @ TCT 2015
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CGuard™
EPS
P. Musialek @ TCT 2015
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ImagingCT
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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CGuard
P. Musialek @ TCT 2015
Images M.Urbanczyk / Z.Moczulski / M.Irzyk / P.BanyśJP2 Hospital, Krakow, Poland
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P. Musialek @ TCT 2015
CGuard
Images M.Urbanczyk / Z.Moczulski / M.Irzyk / P.BanyśJP2 Hospital, Krakow, Poland
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Evidencepublished
*
* full paper or journal abstract by October 2015
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
CGuard ™ embolic prevention stent
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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DW-MRI: the unforgiving testimony
of what you’ve done
to the TARGET ORGAN...
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
√
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P. Musialek @ TCT 2015J. Schofer, P. Musialek et al. TCT 2014
Anti - Embolic Carotid Stent
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P. Musialek @ TCT 2015J. Schofer, P. Musialek et al. TCT 2014
Anti - Embolic Carotid Stent
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CAS (and CEA) are –and will remain–
emboli-generating procedures
amenable toelimination
withmesh
P. Musialek @ TCT 2015
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CAS (and CEA) are –and will remain–
emboli-generating procedures
amenable toelimination
withMicroNet
+MicroNetprotection
duringstent healing!
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
Prospective evaluation of All-comer peR-
cutaneous cArotiD revascularization In sympto-
matic and increased-risk asymptomatic carotid
artery stenosis using CGuard™ Micronet-covered
embolic prevention stent system:
The PARADIGM Study
EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015
*Dept. of Cardiac & Vascular Dieases, John Paul II Hospital, Krakow, Poland; 10.2014–03.2015
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015
* Emboshield (n=7); FilterWire (n=14); Spider (n=25)** Gore FlowReversal (n=4) or flow reversal with MoMa (n=21)
(NB. mean flow reversal time was 6min 48s, from 5min 18s to 11min 2s) # ø 4.5mm (n=5); ø 5.0mm (n=36); ø 5.5mm (n=29); ø 6.0mm (n=1);§ 30mm in 51 lesions; 40mm in 18 lesions (2 other lesions required two stents each)
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P. Musialek @ TCT 2015EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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P. Musialek @ TCT 2015
n=71 arteries
in 68 patients
EuroPCR 2015 (www.europcr.com) and TCT-73 (2015)
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InformationProcedure - Relevant
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
Re-sheathable ?
Crossing profile
Foreshortening
Stent placementaccuracy
Ability to eliminateresidual stenosis
Externally-analysedsystematicDW MRI study data
yes*
*up to 50% released length
no no
5F5F (smaller diam)6F (larger diam)
6F
yes no
– ++ N/D
N/DN/D yes
yesunknown unknown
unknown**
**probably not substantial
Name RoadSaveraka Casper
CGuard™Embolic Prevention Stent
# PARADIGM PCR2015 and TCT-73 N/D = not determined## CARENET JACC Intv 2015;8:1229
#
#
#
##
Gore®Carotid Stent
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Studieson-going
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
50% patient cohort recruitment threshold crossed
Roadsaver
√
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
GORE® Carotid Stent Clinical Study for the treatment of carotid Artery stenosis in patients at increased risk For adverse
events From carOtid enDarterectomy
The Gore SCAFFOLD Clinical Study
• Number of Subjects312 subjects (max 40 at each site)
• Primary EndpointComposite of Major Adverse Events (MAE) defined as death,
any stroke, or myocardial infarction through 30 days post indexprocedure plus ipsilateral stroke between 31 days and 1 year
*All primary endpoint events will be determined by the study Clinical Events Committee
• 50% patient cohort recruitment threshold crossed
• Data expected 2017
Study data courtesy WL Gore & Associates
PIs: P.A. Schneider and W.A. Gray
√
NCT # 01901874
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Announced:
Planned enrollment: n = 200 patients
Primary endpoint: clinical – MAE
death/stroke/MI ≤ 30 days
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
PARADIGM – Extend
(aka PARADIGM-101)
PI: P. Musialek / Krakow
subacute stroke
√
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Unknowns
remaining
P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
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Remaining Unknowns (1)
P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
Is there a product/design-specific ”gradient”in the embolic prevention efficacy?
.
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P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
Is there a product/design-specific ”gradient”in the embolic prevention efficacy?
.Remaining Unknowns (1)
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P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
Is there a product/design-specific ”gradient”in the embolic prevention efficacy?
.Remaining Unknowns (1)
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P. Musialek @ TCT 2015
Mesh-Covered Stents for Carotid Intervention
Large-scale (muli-center, multi-hundred patient),controlled clinical endpoint data?
.
Long-term treatment durability / ’no restenosis’ proof.
Role in open (CEA) vs. endo (CAS) balance
Role in primary stroke prevention
.
.
NB. sofar –no worryingsignal
Remaining Unknowns (2)
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Conclusions
Mesh-Covered Stents for Carotid Intervention
P. Musialek @ TCT 2015
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P. Musialek @ TCT 2015
Clinical evidence in October 2015…1 peer-reviewed, published clinical study
- multicenter, single-arm- DWI controlled (24-48h, 30d, external analysis)
.CARENET, JACC Intv 2015;8:1229-1234
Mesh-Covered Stents for Carotid Intervention
![Page 108: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/108.jpg)
P. Musialek @ TCT 2015
Clinical evidence in October 2015…1 peer-reviewed, published clinical study
- multicenter, single-arm- DWI controlled (24-48h, 30d, external analysis)
several moderately-sized investigator-initiatedsingle arm studies with clinical endpoints
- 1 with full 30-day data available in all-comers(others underway or planned)
.CARENET, JACC Intv 2015;8:1229-1234
.
Mesh-Covered Stents for Carotid Intervention
![Page 109: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/109.jpg)
P. Musialek @ TCT 2015
Clinical evidence in October 2015…1 peer-reviewed, published clinical study
- multicenter, single-arm- DWI controlled (24-48h, 30d, external analysis)
several moderately-sized investigator-initiatedsingle arm studies with clinical endpoints
- 1 with full 30-day data available in all-comers(others underway or planned)
> 300pts single-arm clinical-endpoint studydue to report in 2017
.CARENET, JACC Intv 2015;8:1229-1234
.
.
Mesh-Covered Stents for Carotid Intervention
![Page 110: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/110.jpg)
P. Musialek @ TCT 2015
Clinical evidence in October 2015…1 peer-reviewed, published clinical study
- multicenter, single-arm- DWI controlled (24-48h, 30d, external analysis)
several moderately-sized investigator-initiatedsingle arm studies with clinical endpoints
- 1 with full 30-day data available in all-comers(others underway or planned)
> 300pts single-arm clinical-endpoint studydue to report in 2017
.CARENET, JACC Intv 2015;8:1229-1234
.
.mesh-covered carotid stents have individual, specificcharacteristics but no comparative studies…
(and such may never be conducted)
.
Mesh-Covered Stents for Carotid Intervention
![Page 111: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/111.jpg)
P. Musialek @ TCT 2015
Clinical evidence in October 2015…1 peer-reviewed, published clinical study
- multicenter, single-arm- DWI controlled (24-48h, 30d, external analysis)
several moderately-sized investigator-initiatedsingle arm studies with clinical endpoints
- 1 with full 30-day data available in all-comers(others underway or planned)
> 300pts single-arm clinical-endpoint studydue to report in 2017
.CARENET, JACC Intv 2015;8:1229-1234
.
.mesh-covered carotid stents have individual, specificcharacteristics but no comparative studies…
(and such may never be conducted)
.
Mesh-Covered Stents for Carotid Intervention
![Page 112: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/112.jpg)
P. Musialek @ TCT 2015
![Page 113: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/113.jpg)
P. Musialek @ TCT 2015
![Page 114: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/114.jpg)
P. Musialek @ TCT 2015
![Page 115: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/115.jpg)
P. Musialek @ TCT 2015
![Page 116: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/116.jpg)
P. Musialek @ TCT 2015
Embolic-Prevention Stent Image Courtesy Dr Juan Rigla, MD PhDPerceptual Imaging Lab, Univerity of Barcelona P. Musialek @ TCT 2015
![Page 117: Mesh-Covered Stents for Carotid Intervention: Rationale ... · Mesh-Covered Stents for Carotid Intervention: Rationale, Device Designs, Imaging, and Data to Date Piotr Musialek, MD](https://reader036.vdocuments.site/reader036/viewer/2022062507/5fcdb534b6b0ca45a41d6459/html5/thumbnails/117.jpg)
P. Musialek @ TCT 2015
Embolic-Prevention Stent Image Courtesy Dr Juan Rigla, MD PhDPerceptual Imaging Lab, Univerity of Barcelona P. Musialek @ TCT 2015
Carotid Revascularization2015 R E A L I T Y +
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