Guidewire coatings: Difference between revisions
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'''To go back to the main page on Guidewires, click [[Guidewire|here]]. | |||
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==Overview== | ==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. | 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. As the guidewire coating becomes more slippery or lubricious, the tactile sensation may be reduced. The reduction in the tactile sensation associated with more lubricious coatings may limit the operator's awareness that the wire has perforated the vessel wall. | ||
==Classification Of Lubricious Coatings== | ==Classification Of Lubricious Coatings== | ||
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===Hydrophobic=== | ===Hydrophobic=== | ||
*Repels water | |||
*Silicone on working area of wire, excluding tip | |||
*No actuation/wetting required | |||
*Reduces friction | |||
*Increases trackability | |||
===Hydrophobic tip and hydrophilic distal end=== | ===Hydrophobic tip and hydrophilic distal end=== | ||
Latest revision as of 21:18, 28 January 2013
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
To go back to the main page on Guidewires, click here.
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. As the guidewire coating becomes more slippery or lubricious, the tactile sensation may be reduced. The reduction in the tactile sensation associated with more lubricious coatings may limit the operator's awareness that the wire has perforated the vessel wall.
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
- Repels water
- Silicone on working area of wire, excluding tip
- No actuation/wetting required
- Reduces friction
- Increases trackability
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)