**6. Equipment**

## **6.1. LeoTM**

LeoTM (Balt, Montmorency, France) was the first closed-cell stent to be released in the market. A second generation was released thereafter as Leo+TM. This is a self-expandable device made of nitinol (nickeltitanium) wires with a braided design. Its main features are good visibility and the availability of long devices (up to 75 mm). According to the manufacturer, the following product characteristics should be noted:


#### **6.2. NeuroformTM**

The first version of the Neuroform stent was approved in 2002 for the treatment of wideneck, intracranial aneurysms. It was designed for vessels with diameters from 2 to 4.5 mm. It was the first self-expandable device specifically designed for assisting the treatment of brain aneurysms with coils. Made of nitinol, the Neuroform stent has an open-cell design. In its first version, a low radial force resulted in a number of cases of inadequate support for the coil mass within the aneurysm and technical problems such as stent migration. The Neuroform2 stent was launched in 2003 and the Neuroform3 in 2005. According to the manufacturer, the following product characteristics should be noted:


**6. Equipment** 

LeoTM (Balt, Montmorency, France) was the first closed-cell stent to be released in the market. A second generation was released thereafter as Leo+TM. This is a self-expandable device made of nitinol (nickeltitanium) wires with a braided design. Its main features are good visibility and the availability of long devices (up to 75 mm). According to the

Available in four nominal diameters: 2.5, 3.5, 4.5 and 5.5 mm, for vessels from 2.0 to 6.5

Recommended to be used in a triaxial system with a distal access system 6F Fargo-

The first version of the Neuroform stent was approved in 2002 for the treatment of wideneck, intracranial aneurysms. It was designed for vessels with diameters from 2 to 4.5 mm. It was the first self-expandable device specifically designed for assisting the treatment of brain aneurysms with coils. Made of nitinol, the Neuroform stent has an open-cell design. In its first version, a low radial force resulted in a number of cases of inadequate support for the coil mass within the aneurysm and technical problems such as stent migration. The Neuroform2 stent was launched in 2003 and the Neuroform3 in 2005. According to the

Interstices of 2–2.5 F (<1mm), allowing the positioning of a microcatheter through the

manufacturer, the following product characteristics should be noted:

Available in nine lengths: 12, 18, 25, 30, 35, 40, 50, 60, 75 mm;

 Equipped with a double helix radio-opaque, easily visible strands; Equipped with delivery microguidewire with a radio-opaque distal tip; Compatible and recommended to be delivered with a Vasco+ microcatheter;

manufacturer, the following product characteristics should be noted:

 Available in a range of sizes from 10 to 30 mm in length; Available in a range of diameters from 2.5 to 4.5 mm;

Flexibility and conformable in tortuous distal anatomy;

**6.1. LeoTM**

mm;

 Self-expandable; Good wall apposition; Very good visibility;

Fargomax.

**6.2. NeuroformTM**

Open cell geometry;

Self-expandable;

stent;

Minimal shortening after deployment;

Capable of apposition in tapered vessels;

Braided design of nitinol wires;

 Significant shortening after deployment; Retrievable up to its 90% deployment;


In 2010, the fourth version of the Neuroform stent was released: Neuroform EZTM. This newest version eliminated the need for an exchange maneuver using a 3m microguidewire. It may be delivered using a standard 3F microcatheter. As a consequence, the following features should be noted:


#### **6.3. EnterpriseTM**

The Cordis Enterprise Vascular Reconstruction Device and Delivery System consists of a self-expanding closed-cell stent and a delivery system. Its design is that of tubular mesh made of nitinol. The delivery system is composed of a delivery wire that acts also as a pusher. A major characteristic of this device is its easy placement, with good wall apposition and excellent support of the coil mass. A partially deployed device can be recaptured once and redeployed. A disadvantage of the delivery system is the absence of a very long microguidewire distal to the parent artery. In the context of very tortuous vessels, this may be a factor of instability during deployment. According to the manufacturer, the following product characteristics should be noted:


