Impulse® Ankle


The Impulse Ankle restricts the amount of dorsiflexion to allow more loading response from the foot. At heel strike, the ankle allows the foot to plantarflex so the amputee may reach foot-flat quickly. As the amputee reaches mid-stance, the ankle’s motion is significantly reduced and allows the amputee to retain the full functionality of the toes and metatarsal area of the prosthetic foot. The ankle also features inversion/eversion and axial rotation. The Impulse Ankle’s sleek profile facilitates adjustments and cosmetic finishing. A titanium pyramid is integrated into the proximal attachment surface of the ankle. No maintenance procedures or replacement parts are required. A rubber-molding technology provides a smooth, cushioned step. Available in six different stiffness options.

Product Highlights:
  • Multiaxial Ankle with Restricted Dorsiflexion Allows for More Foot Response
  • Lighter or as Light as Any Other Ankle for High-Activity Patients
  • Patient Weight Limit of 350 lbs for Heavy Duty Applications
  • Innovative Combination of Materials for Enhanced Performance
  • High Quality; No Maintenance Product
  • Six Ankle Stiffness Options
  • Sleek Deign for Easy Adjustments and Cosmetic Finishing
  • Use with Impulse Foot for Exceptional Performance
Weight 185 g
Patient Weight Limit* 350 lbs/160 kg*
U.S. L-Code Suggestion L5986
Trial Period 30 days from date of patient fitting
U.S. Warranty  12 months from date of patient fitting

* Body weight plus any loads normally and routinely carried cannot exceed this weight limit.

Ankle Stiffness

Amputee Weight Ankle Selection
Aluminum Base
Less than 150 lbs (68 kg) Red
151-190 lbs (69-86 kg) Blue
191-230 lbs (87-104 kg) Yellow
231-270 lbs (105-122 kg) Green
Titanium Base
271-310 lbs (123-140 kg) Black
311-350 lbs (141-160 kg) White
Product No. Description
IMPA-R Impulse® Ankle, Stiffness code Red
IMPA-B Impulse® Ankle, Stiffness code Blue
IMPA-Y Impulse® Ankle, Stiffness code Yellow
IMPA-G Impulse® Ankle, Stiffness code Green
IMPA-K Impulse® Ankle, Stiffness code Black
IMPA-W Impulse® Ankle, Stiffness code White

Impulse® Ankle Instructions 

Fasteners & Torque
M10 x 32 mm Socket Head Capscrew  30 ft-lbs/41 Nm
Related products:
Impulse® Foot

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