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==Overview==
==Overview==
The distal half of coronary guidewires are coated with slippery (lubricious) materials to reduce the friction of the guidewire as it crosses the blockage in the coronary artery and to also facilitate the passage and delivery of intracoronary devices down the artery.
The distal half (the distal 30-35 cm) of coronary guidewires are coated with slippery (lubricious) materials to reduce the friction of the guidewire as it crosses the blockage in the coronary artery and to also facilitate the passage and delivery of intracoronary devices down the artery.  


==Types of LUBRICIOUS COATING==
==Classification Of Lubricious Coatings==
*Hydrophilic  
===Hydrophilic ===
*Hydrophobic
*:Attracts water
*Hydrophobic tip and hydrophilic distal end
*:It is applied over polymer or stainless steel (including tip coils)
*:Thin, non-slippery solid when dry, needs lubrication to perform
*:Becomes a gel when wet
*:Reduces friction
*:Increases trackability


*Affects lubricity, friction and wire tracking in crossing lesions as well as during stent and balloon delivery.
===Hydrophobic===
===Hydrophobic tip and hydrophilic distal end===


*Facilitate smooth movement
==Commonly used Guidewire Coatings==
 
*PTFE (Polytetrafluroehylene) is the most common coating
*Confined to the distal 30-35 cm
*Teflon
 
*Silicone
==Commonly used coatings==
*Pro/Pel®, (Medtronic)
 
*Hydro-track® (Medtronic)
1.PTFE (Polytetrafluroehylene) - commonest
*Hydro-coat (Abbott vascular)
 
2.Teflon
 
3.Silicone
 
4.Pro/Pel®, (Medtronic)
 
5.Hydro-track® (Medtronic)
 
6.Hydro-coat (Abbott vascular)


===HYDROPHILIC COATING===
===HYDROPHILIC COATING===


*attracts water
*It is applied over polymer or stainless steel (including tip coils)
*Thin, non-slippery solid when dry, needs lubrication to perform
*Becomes gel when wet
*Reduces friction
*Increases trackability


===HYDROPHOBIC COATING===
===HYDROPHOBIC COATING===

Revision as of 20:27, 23 October 2011

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

The distal half (the distal 30-35 cm) of coronary guidewires are coated with slippery (lubricious) materials to reduce the friction of the guidewire as it crosses the blockage in the coronary artery and to also facilitate the passage and delivery of intracoronary devices down the artery.

Classification Of Lubricious Coatings

Hydrophilic

  • Attracts water
    It is applied over polymer or stainless steel (including tip coils)
    Thin, non-slippery solid when dry, needs lubrication to perform
    Becomes a gel when wet
    Reduces friction
    Increases trackability

Hydrophobic

Hydrophobic tip and hydrophilic distal end

Commonly used Guidewire Coatings

  • PTFE (Polytetrafluroehylene) is the most common coating
  • Teflon
  • Silicone
  • Pro/Pel®, (Medtronic)
  • Hydro-track® (Medtronic)
  • Hydro-coat (Abbott vascular)

HYDROPHILIC COATING

HYDROPHOBIC COATING

  • repels water
  • Silicone on working area of wire, excluding tip
  • No actuation/wetting required
  • Reduces friction
  • Increases trackability

Platinum in the tip for radio-opacity. (usually 3-25 cm length at the tip)