FAQs

MicroNet™ FAQs

 

What is the MicroNet™ made from?

The MicroNet is a mesh woven from a single strand of 20µ Polyethylene Terephthalate (PET), a non-biodegradable, bio-stable synthetic fiber widely used in a variety of industries from beverages to medical devices.

 

Does the MicroNet interfere with arterial healing?

No, the MicroNet allows the endothelialization process to occur naturally.

 

Does the MicroNet increase the risk of stent thrombosis?

No, the MicroNet only covers the outer surface of the stent system that is in contact with the arterial wall.

 

Does the MicroNet affect the deliverability of the system?

No, the sleeve is so thin (20µ) and flexible it does not inhibit trackability or deployment.

 

What is the difference between CGuard™ and a covered stent?

The main difference is in the percentage of surface area covered by the MicroNet, which is only about 20%. Whereas with covered stents, 100% of the surface area of the stent is covered.  Covered stents function quite differently, for example, they block flow into side branches and obstruct the artery’s natural healing process.

 

Does CGuard obstruct flow to side branch vessels?

The MicroNet’s balanced pore size allows excellent flow into branch vessels.

 

Is there any lesion site in the carotid arteries where CGuard is contraindicated?

No.

 

Is CGuard indicated for use anywhere besides in the carotid arteries?

No.

 

Is there a conical / tapered version of CGuard?

No, it is not necessary because CGuard’s SmartFit Taper Technology ensures it can conform to any anatomy.

 

Is CGuard drug eluting or coated?

No.

 

Can CGuard be used in a direct carotid puncture procedure (DCP)?

Yes, there is no reason CGuard could not be used in a DCP procedure.

 

Is pre-dilation necessary?

Operators should use standard practice. However, pre-dilation is recommended when there is potential difficulty engaging the lesion. Use extreme caution when pre-dilating because it can cause embolization during a sometimes unprotected stage of the procedure. Many physicians safely utilize direct stenting with both CGuard and other carotid devices when conditions allow.

Is post-dilation necessary?

Operators should use standard practice. However, post-dilation should be carefully used only in cases where it is warranted, such as improving apposition or plaque compression.

 

How does CGuard prevent embolization?

The MicroNet traps potential emboli against the arterial wall before dislodgement.

 

What is late embolization and how does CGuard prevent it?

Late embolization refers to embolization that occurs after the procedure, usually caused by plaque prolapsing through stent struts. The MicroNet prevents plaque from prolapsing.

 

What is the difference between prevention and protection?

CGuard’s method of protection is prevention. CGuard protects proactively rather than reactively, as most embolic protection systems currently function.

 

Does CGuard replace a distal filter?

Operators should use standard practice. However, CGuard is an embolic prevention system. No build-up of emboli was observed on filters when it was measured during CARENET.

 

Does CGuard replace proximal occlusion?

Operators should use standard practice. However, CGuard is an embolic prevention system. In some cases, proximal occlusion can be complementary with CGuard.