Excimer Laser angioplasty for femoro-popliteal disease. Sendai Kousei Hospital, Tokyo Kamata Hospital Naoto Inoue MD, FSCAI, FJCC, FAHA
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1 Excimer Laser angioplasty for femoro-popliteal disease Sendai Kousei Hospital, Tokyo Kamata Hospital Naoto Inoue MD, FSCAI, FJCC, FAHA
2 Speaker s name: Naoto Inoue I have the following potential conflicts of interest to report: Research contracts Consulting- Kaneka, Tokai-Medical Employment in industry Stockholder of a healthcare company Owner of a healthcare company Other(s) I do not have any potential conflict of interest
3 The Wavelength Story Ultraviolet vs.. Infrared 193nm 308nm 2090nm 10600nm Ultraviolet Infrared Excimer (CVX-300 Ø ) Excimer (ophthalmology) CO 2 Ho:YAG
4 The XeCl Excimer Laser (The Cool Laser) The Cool Laser Dissolves tissue without burning The Hot Laser Heat intensive process burns tissue
5 Photochemical -UV light pulse hits tissue -125 nanosecond duration -100 microns penetration -billions of tissue bonds fracture per pulse
6 Photothermal -absorption creates molecular vibration in tissue -vibration of molecules heats intracellular water -steam forms expanding vapor bubble
7 Photomechanical -expansion and collapse of vapor bubble breaks down tissue and sweeps debris away from tip us Thrombus -debris is water,gas, small particles (90% < 10 microns) -ablation depth >> 10 microns per pulse -entire process time per pulse is 500 millionths of a second
8 Laser angioplasty in PAD Laser+balloon angioplasty for de novo lesion?
9 Laser angioplasty in PAD
10 Laser+balloon angioplasty for de novo lesion
11 Laser+balloon angioplasty for de novo lesion
12 CELLO trial
13 Efficacy of laser in PAD Thrombotic lesion Calcified lesion ISR Below the knee
14 Thrombotic occlusion due to AF
15 Thrombotic occlusion due to AF 7F 1.7 Turbo booster Post adjunctive ballooning
16 Efficacy of laser in PAD Thrombotic lesion Calcified lesion ISR Below the knee
17 Calcified CFA Endoarterectomy
18 1.7mm Laser Calcified CFA Turbo booster
19 Calcified CFA Adjunctive ballooning
20 Efficacy of laser in PAD Thrombotic lesion Calcified lesion ISR Below the knee
21 Turbo Booster for long stent occlusion
22 Turbo Booster for long stent occlusion Post laser catheter Post adjunctive ballooning
23 SFA Trials Show Restenosis / Loss of Patency is an Issue for All Stents Complete SE 3 (Medtronic) SFA Stent Trials 1 year = 73% Results May Be Understated BMS DES Everflex 4 (Covidien) Absolute 5 (Abbott) Zilver BMS 6 (Cook) Zilver PTX 6 (Cook) 1 year = 78% 2 years = 66% 2 years = 49% 1 year = 27% 2 years = 37% 1 year = 10% 2 years = 19% 1. Are these real-world patient sets with inclusion of Long lesions Multiple stents Repeat ISR Severity of underlying disease 2. Has disease stabilized at 2 years or will restenosis continue? Spectranetics. All Rights Reserved. For External Distribution. D
24 Development of Restenosis Has 3 Components 7 Stage Timing Effect 1. Vessel Recoil Early (within 24 hours) Immediate shrinkage of vessels due to arterial wall elasticity 2. Negative Remodeling Mid-stage (within days to weeks) Injury response causing contraction of vessel wall Stents inhibit 3. Neointimal Hyperplasia Late (within weeks to months to years) Injury response causing new tissue growth within artery Primary Component of ISR Spectranetics. All Rights Reserved. For External Distribution. D
25 Atherectomy Treatment Options SilverHawk Diamondback ISR Indication Low Risk of Stent Interaction Low Risk of Embolization Contraindicated Contraindicated X X X Ablation vs. Displacement/Dis lodgement X Ablation vs. Displacement/Dis lodgement Jetstream Not indicated X X Ablation vs. Displacement/Dis lodgement According to FDA Guidance, contraindicated device should not be used, as the risk of use clearly outweighs any benefit Spectranetics. All Rights Reserved. For External Distribution. D
26 Advantage of Laser for ISR Difficult to Cross the entire segment with a wire The wire frequently exists through the stent struts Too much tissue to be displaced by balloon dilatation Need to treat w/o disturbing the underlying stent Need to avoid distal embolization
27 EXCITE Study Overview 22 Purpose Method Patients Evaluated the safety and effectiveness of Excimer Laser Atherectomy (ELA) with adjunctive PTA vs. PTA alone in the treatment of FemPop ISR Prospective, randomized (2:1), multi-center study Primary Safety = 37 day MAE Primary Efficacy = freedom from 6 month clinically driven TLR Real-world population Enrollment: 169 ELA + PTA vs. 81 PTA alone Third-party assessment for all clinical events & angiographic/ultrasound readings Spectranetics. All Rights Reserved. For External Distribution. D
28 Designed for Real-World ISR CHALLENGING CONDITIONS Long stents Multiple stents Common stent fractures (Grades 1-3) Key Inclusion Criteria ISR lesion 4 cm Rutherford classification 1-4 RVD 5.0 mm and 7.0 mm 1 patent tibial artery Key Exclusion Criteria Target lesion extends > 3 cm beyond stent margin Untreated inflow lesion Grade 4 or 5 stent fracture Follow-up Discharge, 30 days, 6 months and 1 year post-procedure Spectranetics. All Rights Reserved. For External Distribution. D
29 Designed for Real-World ISR SICK PATIENTS Elderly patients High rates of diabetes, hypertension, & CAD 1/3 had recurrent ISR Patient Demographics ELA + PTA (N=169) PTA Alone (N=81) P-value Age (mean) Male 62.7% 61.7% 0.89 Hypertension 95.8% 93.8% 0.53 Hyperlipidemia 96.4% 95.0% 0.73 Diabetes Mellitus 47.0% 47.5% 1.00 CAD 64.3% 68.8% 0.57 Previous ISR 32.57% 30.0% 0.77 Smoking 85.0% 91.3% 0.23 CLI 16.0% 12.3% Claudicants 84.0% 87.7% Spectranetics. All Rights Reserved. For External Distribution. D
30 Designed for Real-World ISR CHALLENGING LESIONS Among longest lesions studied in any SFA trial 20% of lesions > 30 cm 1/3 total occlusions Laser treated significantly more calcified lesions/arteries Difference due to statistical chance, not design Third-Party Angiographic Core Lab Assessment Baseline Lesion Characteristics ELA + PTA (N=169) PTA Alone (N=81) P-value Mean Lesion Length (cm) Diameter Stenosis (%) 81.7% 83.5% 0.42 Popliteal Lesion 21.3% 23.4% Total Occlusion 30.5% 36.8% 0.37 Calcium (Mod/Sev) * 27.1% 9.1% Stent Fracture 0.08 None 85.8% 95.8% Type 1 or % 4.2% Type 3, 4 or 5 2.8% 0.0% * Calcium Grade: 0 - No calcification; 1 - Superficially localized non-confluencing wall calcifications, < 5 mm on fluoroscopy; 2 - Confluencing calcifications > 5 mm, including multiple deposits, not involving the whole vessel diameter in angiographic working projection; 3 - Confluencing calcifications filling up the whole vessel diameter Spectranetics. All Rights Reserved. For External Distribution. D
31 Superiority in Freedom from TLR Consistent Throughout Follow-up Period Freedom From Target Lesion Revascularization ELA + PTA PTA Superior throughout study term Longer-term follow-up to continue Spectranetics. All Rights Reserved. For External Distribution. D
32 Efficacy of laser in PAD Thrombotic lesion Calcified lesion ISR Below the knee
33 BK lesion
34 BK lesion Kissing balloon 2.5x100mm 2.5x40mm
35 Limb salvage 93%
36 0.9 TURBO ELITE
37 Penetration of calcium
38 0.9 (80/80) Laser is not almighty Severe calcified lesion-balloon uncrossable lesion 0.9 Laser unable to cross
39 Wire cross Balloon not cross Broken laser
40 Distal bypass
41 Perforation due to deep ablation
42 Laser perforation 2.0mm Laser
43 Laser perforation Covered stent
44 Conclusions Laser is the assisted device to facilitate balloon response ISR is the ideal indication of laser compared to other debulking devices Laser can ablate moderate calcification but dose not work in the severe calcified lesion Careful selection of laser size and power are needed to prevent perforation
45 Thank you!
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