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Anti-Thrombotic Fluoropolymer

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Anti-Thrombotic Fluoropolymer Promotes Safety

The XIENCE™ Stent polymer with a fluorinated surface has shown protective attributes—the ability to tightly bind albumin to create a “protective cloak” around the stent.2

The XIENCE™ Stent Fluoropolymer—Proven to Protect2,3

Another factor that sets XIENCE™ Stent apart is its fluoropolymer coating. Unlike other polymer coatings, the fluoropolymer interacts with proteins in the blood in a way that reduces thrombus formation—a process known as fluoropassivation.

Fluoropassivation Leads to Thromboresistance3

XIENCE™ Stent, widely considered to be the gold standard for patient safety and efficacy, is coated with a fluoropolymer.

The Xience Fluoropolymer: Proven to Protect

Due to thromboresistance and low inflammatory responses, fluorinated surfaces encourage faster endothelization and healing.4

Three step graph showing how the albumin, which the XIENCE Stent’s fluoropolymer retains, minimizes inflammatory response, promotes endothelial growth and leads to positive outcomes.

Fluoropolymer Stent vs Bare Metal Stent and Biodegradable Polymer Stent

Moreover, the XIENCE™ Stent fluoropolymer has minimal coating defects compared to biodegradable polymer DES (BP-DES).9

In contrast to the visual above, most stents available today—biodegradable polymer stents, durable polymer stents or bare metal stents—have non-fluorinated surfaces that interact with proteins in the following ways:

  • The surfaces attract less albumin and more fibrinogen.10
  • The fibrinogen, in turn, leads to more platelet adhesion and activation.11
  • The platelets, fibrinogen and red blood cells can aggregate and create a thrombus.12


XIENCE™ Stent Fluoropolymer vs Other Types of Stents

XIENCE™ Stent’s fluoropolymer demonstrates the fewest platelets adhering to the stent surface—an important factor in stent thrombosis.3 This fluoropolymer can protect patients from both acute and long-term complications.3,13

Representative confocal photomicrographs stained for platelets (CD42b/CD61). N=5 per stent. This preclinical ex vivo porcine shunt model used aspirin-only antiplatelet therapy.

XIENCE Stent shows significantly less platelet adhesion vs other stents: Synergy, Orsiro, Ultimaster, Resolute Onyx, Biofreedom.
XIENCE™ Stent: Least Blood Platelet Adhesion (p < 0.01) When Using Aspirin Monotherapy3


XIENCE™ Stent: Least Blood Platelet Adhesion (p < 0.05) When Using P2Y12 Inhibitor Monotherapy3

Representative confocal photomicrographs stained for platelets (CD42b/CD61). N=8 per stent. This preclinical ex vivo porcine shunt model used clopidogrel-only antiplatelet therapy.

XIENCE Stent shows significantly less platelet adhesion vs other stents: Synergy, Resolute Onyx, Biofreedom

XIENCE™ Stent: Least Blood Platelet Adhesion When Using Heparin Only14

Expert's Point of View: Reduced Inflammatory Response

In the images “on the right you can see the [pro-thrombotic] platelet adherence. XIENCE™ Stent [the image at the bottom] has hardly any attachments to it.” — Renu Virmani, MD, referring to the photomicrographs, where green indicates platelet adhesion.

Visual Evidence of Fluoropolymer Safety

In several analyses, XIENCE™ Stent exhibits the most thromboresistance when compared to several different BP-DES.3,14

 

Least Thrombus Area with XIENCE™ Stent vs BP-DES14

Ex vivo porcine photomicrographs reveal the least thrombus area on XIENCE™ Stent (green areas are platelets).

XIENCE™ Stent has far fewer platelets adhering, making it more thromboresistant vs BioMatrix Flex, Orsiro and Synergy.

Real-Time Platelet-Device Interaction

CVPath Institute also conducted tests to show real-time platelet-device interaction between different types of stents.

XIENCE™ Stent
Compared with Synergy‡

XIENCE™ Stent
Compared with Other DES

This preclinical model used in vitro human blood with heparin only. Representative confocal photomicrographs stained for platelets. Real-time platelet-device interaction was visualized under confocal microscopy and recorded in a time-lapse video. Image processing quantified platelet deposition on devices.

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References

  1. Zanchin C, et al. JACC Cardiovasc Interv. 2019;12(17):1665-1675. Serruys P, et al. N Engl J Med. 2010;363:136-146. Shiomi H, et al. JACC Cardiovasc Interv. 2019;12:637-647. Kufner S, et al. Circulation. 2019:139(3):325-333. Palmerini T, et al. Lancet. 2013;379:1393-1402. Bangalore S, et al. Circulation. 2012;125:2873-2891. Bangalore S, et al. Circ Cardiovasc Interv. 2013;6(6):378-390. Pilgrim T, et al. Lancet. 2014;384:2111-2122. Pilgrim T, et al. Lancet. 2018;392:737-746. Data on file at Abbott.
  2. Garfinkle AM, et al. Trans Am Soc Artif Intern Organs. 1984;30:432-439. Ao PY, et al. Eur J Vasc Endovasc Surg. 2000;20:241-249. Jinnouchi H, et al. EuroIntervention. 2020;EIJ-D-19-00938.
  3. Jinnouchi H, et al. J Am Coll Cardiol. 2019;74:(Suppl B):TCT-291. Sato Y, et al. PCR eCourse 2020.
  4. Szott LM, et al. Biointerphases. 2016;11:029806. Wertz CF, et al. Langmuir. 2001;17:3006-3016.
  5. Panchalingam V, et al. ASAIO J. 1993;39:M305-M309.
  6. Paton DM, et al. U.S. Patent 5,356,668. Garfinkle AM, et al. Trans Am Soc Artif Intern Organs. 1984;30:43-439.
  7. Szott LM, et al. Biointerphases. 2016;11:029806.
  8. Mehran R, et al. TCT Connect 2020, XIENCE 28/90.
  9. Data on file at Abbott.
  10. Panchalingam V, et al. ASAIO J. 1993;39:M305-M309. Jinnouchi H, et al. EuroIntervention. 2020;EIJ-D-19-00938.
  11. Wu Y, et al. J Biomed Mater Res. 2005;74(4):722-738. Tsai WB, et al. J Biomed Mater Res. 1999:44:130-139.
  12. Garfinkle AM, et al. Trans Am Soc Artif Intern Organs. 1984;30:432-439.
  13. Kamberi M, et al. J Biomed Mater Res B Appl Biomater. 2018;106(5):1721-1729. Zanchin, C. et al. JACC Cardiovasc Interv. 2019;12(17):1665-1675. Serruys P, et al. N Engl J Med. 2010;363:136-146. Shiomi H, et al. JACC Cardiovasc Interv. 2019;12(7):637-647. Kufner S, et al. Circulation. 2019:139(3):325-333.
  14. Otsuka F, et al. JACC Cardiovasc Interv. 2015;8:1248-1260.

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