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CARAvalve

 
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VFP8

VFP8

FEATURES:

  • Made of medical-grade silicone
  • Immediate reduction of intraocular pressure
  • Unique, non-obstructive valve system to prevent excessive drainage and chamber collapse
  • Implanted in a true-single-stage procedure
  • Tapered profile for easy insertion
  • Silicone plate
  • Aqueous percolation holes
  • Thinner Plate
  • MRI compatible

PLATE/VALVE SPECIFICATIONS:

Thickness: 0.9mmWidth: 9.60mmLength: 10.00mmSurface Area: 96.00mm2

TUBE SPECIFICATIONS:

Length: 25.00mmInner Diameter: 0.305mmOuter Diameter: 0.635m

Materials:

Valved Plate Body: Medical grade siliconeDrainage Tube: Medical grade siliconeValve: Medical grade silicone, elastomer membraneValve Casing: Medical grade polypropylene

ORDERING INFORMATION:

Model: VFP8 (Ahmed™ Flexible Plate™)

 

MECHANICS OF THE AHMED™ GLAUCOMA VALVE

THE VENTURI EFFECT:

To reduce internal friction within the valve system, the Ahmed™ Glaucoma Valve (AGV™) utilizes a specially designed, tapered trapezoidal chamber to create a Venturi effect to help aqueous flow through the device. As demonstrated by Bernoulli’s equation of hydrodynamic principle, the inlet velocity of aqueous entering the larger port of the Venturi chamber increases significantly as it exits the smaller outlet port of te tapered chamber. In an AGV™ this increased exit velocity greatly helps in evacuation aqueous from the valve, thereby helping to reduce valve friction.

NON-OBSTRUCTIVE, SELF REGULATING VALVE MECHANISM:

The Ahmed™ Glaucoma Valve has no obstruction in it path of fluid flow. For the flow to be non-obstructive, a particle large enough to pass through the lumen of the tube, will easily pass through the much larger opening of the Venturi-Flow™ chamber. The elastic membranes help to regulate fluid flow at all times, consistently by changing their shape. The tension on these membranes is responsible for reducing hypotony.


VFP7

FEATURES:

  • Made of medical-grade silicone

  • Immediate reduction of intraocular pressure
  • Unique, non-obstructive valve system to prevent excessive drainage and chamber collapse
  • Implanted in a true-single-stage procedure
  • Tapered profile for easy insertion
  • Silicone plate
  • Aqueous percolation holes

PLATE/VALVE SPECIFICATIONS:

Thickness: 0.9mmWidth: 13.00mmLength: 16.00mmSurface Area: 184.00mm2

TUBE SPECIFICATIONS:

Length: 25.00mmInner Diameter: 0.305mmOuter Diameter: 0.635m

MATERIALS:

Valved Plate Body: Medical grade siliconeDrainage Tube: Medical grade siliconeValve: Medical grade silicone, elastomer membraneValve Casing: Medical grade polypropylene

ORDERING INFORMATION:

Model: VFP7 (Ahmed™ Flexible Plate™)

FRV