First experience with DCB for treatment of dialysis access stenosis The Greek experience

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1 First experience with DCB for treatment of dialysis access stenosis The Greek experience D Karnabatidis Department of Interventional Radiology Patras University Hospital Patras, Greece

2 Background Vessel Restenosis Endovascular treatment options Restenosis Coronary angioplasty: ~ 9 months Carotid angioplasty: ~ 1 year Iliac angioplasty: ~ 5 years Femoral angioplasty: ~ 2 years AV-Fistula angioplasty: ~ 6 months AV-Graft angioplasty: < 6 months Aftab SA, et al. Randomized clinical trial of cutting Balloon angioplasty versus high-pressure balloon angioplasty in hemo- dialysis arteriovenous fistula stenosis resistant to conventional balloon angioplasty. J Vasc intervent Radiol 2014; 25:

3 Vascular Access Restenosis Mechanical and biochemical parameters contribute to a continuous neointimal hyperplasia formation Histological differences between veins and arteries Substantial differences in blood flow dynamics (stagnation and recirculation zones) ESRD causes marked endothelial dysfunction uremia oxidative stress inflammation Bessa, K.L, Ortiz, J.P. Journal of Visualization 2009 Diskin CJ, Blood Purification, 2010

4 2010 PCB PCB in DIAYSIS LEGS

5 Five-years Clinical Experience with Paclitaxel-coated Balloon Angioplasty for Stenoses Causing Dysfunction of Dialysis Arteriovenous Fistula and Synthetic Grafts

6 Purpose This audit was performed to evaluate the longterm safety and efficacy of paclitaxel-coated balloon (PCB) angioplasty of dysfunctional dialysis vascular access

7 Flowchart 70 patients 96 procedures 105 devices AVG 28 patients 31 procedures 32 devices AVG 25 patients 28 procedures 29 devices Corrupted data 8 patients 8 procedures 8 devices AVF 42 patients 65 procedures 73 devices AVF 37 patients 60 procedures 68 devices In Total 62 patients 88 procedures 97 devices

8 General Characteristics May 2010 August 2014

9 Outcome Measures Primary Target Lesion Primary Patency (TLPP) (Re-intervention-free) Secondary Identification of factors influencing TLPP Complications rates

10 Baseline Variables Mean Age ( years) 60 ±14 Gender (men/total) 40/ % Cause of ESRD (#/total) DM 19/ % GN 5/62 8% Unknown 26/ % PCKD 4/62 6.5% Other 8/ % Comorbidities (#/total) DM 29/ % HPT 23/ % Smoking 22/ % PAD 29/ % Heart disease 26/ % Stroke 8/ %

11 Procedural Baseline Variables I Native arteriovenous fistula % Radio-cephalic % Brachio-cephalic 20 54% Brachio-basilic (transposed) % Prosthetic arteriovenous graft % Brachial % Antebrachial 0 0% Straight 24 96% Loop 1 4%

12 Procedural Baseline Variables II Mean Circuit Age (years) 3.2 ±2,80 De novo lesions 38/ % Re-Interventions 50/ % Thrombosis* 8/ % *PCB following pertcuaneous declotting procedure

13 Devices Devices (#/total) INPACT 79/97 81,5% LUTONIX 16/ % EUROCOR 2/97 2% Size Diameter (mm) 5.8±1.1 Length (mm) 67±24 Post Dilation Devices* Diameter (mm) 7±2 Length (mm) 66±24 *Dorado, Atlas, Conquest, XXXL Vascular, Armada, Passeo, Mustang, Rival

14 Results

15 Results AVGs 23 venous juxta-anastomotic lesions (3/23 in stent graft restenosis) 5 axillary vein outflow lesions Mean AVG age: 3.0 ± 1.5 y Average PCB diameter: 6.5 ± 1.0 mm (length 57.8 ± 17.5 mm) Post-dilation: 32.1% (9/28 cases) Average diameter of post-dilation high pressure balloon catheters: 8.0 ± 2.0 mm (length 68 ± 33 mm). Clinical success and anatomic success: 100%

16 Results AVFs Main body lesions: 30 (50%) Juxta-anastomotic lesions: 24 (40%) Cephalic arch lesions: 2 (3.3%) Subclavian vein outflow lesions: 2 (3.3%). Average PCB diameter 5.6 ± 1.2 mm (length 71 ±7.1mm) Post-dilation: 28.3% (17/60 lesions ) Clinical success: 100% Anatomic success: 98.4% (one rupture at the cephalic arch with a 7 mm PCB not responding to prolonged inflation 8mm stent graft

17 6 months: 1 year: 2 years: 5.9%

18 AVF vs. AVG AVG 0.64 years vs years AVF HR 1.12, 95% CI: 0.66 to 1.89; p=0.65

19 Independent Predictors of TLPP* De novo Lesions Vascular Access Age <3 years Previous Thrombosis Stroke *By Multivariate Cox Regression Analysis

20 De novo HR: 2.54; 95%CI: , p=0.002

21 < 3 years HR: 0.38; 95%CI: , p=0.002

22 Thrombosis HR: 2.67; 95%CI: , p=0.01

23 Stroke HR: 3.11; 95%CI: , p=0.001

24 Complications Major: 1.1%: One cephalic vein rupture managed intraprocedurally with stent graft deployment Minor: 11.3% Small hematomas not requiring further treatment and not compromising dialysis

25 Conclusions In this real-life series, Paclitaxel-coated balloon angioplasty of dysfunctional dialysis access was safe and provided very satisfactory primary patency rates Treatment of de novo lesions was correlated with significantly better patency

26 Initial data are promising Growing experience Journal of Vascular and Interventional Radiology 2015

27 Ongoing large multicenter trials

28 Patras University Hospital

29 First experience with DCB for treatment of dialysis access stenosis The Greek experience D Karnabatidis Department of Interventional Radiology Patras University Hospital Patras, Greece

Konstantinos Katsanos, MSc, MD, PhD, EBIR

Konstantinos Katsanos, MSc, MD, PhD, EBIR Konstantinos Katsanos, MSc, MD, PhD, EBIR Interventional Radiologist Patras University Hospital, Rion, Greece & Guy s and St. Thomas Hospitals, London, UK Honoraria from MEDTRONIC, BOSTON SCI Research

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