Suitable for outdoor use
PDAC Approved
Activity Level 3

The SmartIP microprocessor controlled knee employs intelligent programming technology that dynamically programs the knee to optimum swing settings for the individual Level 3 activity user, reducing the amount of energy expended by trans-femoral prosthesis users. The weight activated stance control provides an adjustable smooth and yielding transition at toe off.

Key Features

  • Smart Programming, electromechanical, adjustable terminal impact and extension damping
  • Comfortable gait from very slow to very fast walking speeds
  • Smoother speed progression because of enhanced program
  • Weight activated stance control
  • Stanceflex option improves comfort
  • Battery life expectancy 9-12 months under normal usage
  • 140° knee flexion
  • 4-Bolt option reduces build height

SmartIP Clinical Evidence Reference

Improvements in Clinical Outcomes using prosthetic knees with microprocessor-controlled swing phase

  • Less cognitive demand during walking, leading to reduced postural sway1
  • Increased walking speed2-5
  • Easier to walk at different speeds4,6
  • More natural gait4
  • Easier to walk on slopes4,6
  • Reduced energy expenditure compared to (non-MPK) mechanical knees3-8
  • Equivalent energy expenditure to other MPKs (swing and stance controlled)9
  • Reduced self-perceived effort4,6
  • Energy expenditure closer to that of able-bodied control subjects10
  • Able to walk further before becoming tired4
  • Better step length symmetry2,6
  • Preference over other prosthetic knees4,6


1. Heller BW, Datta D, Howitt J. A pilot study comparing the cognitive demand of walking for transfemoral amputees using the Intelligent Prosthesis with that using conventionally damped knees. Clin Rehabil 2000; 14: 518–522.
2. Chin T, Maeda Y, Sawamura S, et al. Successful prosthetic fitting of elderly trans-femoral amputees with Intelligent Prosthesis (IP): a clinical pilot study. Prosthet Orthot Int 2007; 31: 271–276.
3. Datta D, Heller B, Howitt J. A comparative evaluation of oxygen consumption and gait pattern in amputees using Intelligent Prostheses and conventionally damped knee swing-phase control. Clin Rehabil 2005; 19: 398–403.
4. Datta D, Howitt J. Conventional versus microchip controlled pneumatic swing phase control for trans-femoral amputees: user’s verdict. Prosthet Orthot Int 1998; 22: 129–135.
5. Buckley JG, Spence WD, Solomonidis SE. Energy cost of walking: comparison of “intelligent prosthesis” with conventional mechanism. Arch Phys Med Rehabil 1997; 78: 330–333.
6. Kirker S, Keymer S, Talbot J, et al. An assessment of the intelligent knee prosthesis. Clin Rehabil 1996; 10: 267–273.
7. Chin T, Sawamura S, Shiba R, et al. Energy expenditure during walking in amputees after disarticulation of the hip: a microprocessor-controlled swing-phase control knee versus a mechanical-controlled stance-phase control knee. J Bone Joint Surg Br 2005; 87: 117–119.
8. Taylor MB, Clark E, Offord EA, et al. A comparison of energy expenditure by a high level trans-femoral amputee using the Intelligent Prosthesis and conventionally damped prosthetic limbs. Prosthet Orthot Int 1996; 20: 116–121.
9. Chin T, Machida K, Sawamura S, et al. Comparison of different microprocessor controlled knee joints on the energy consumption during walking in trans-femoral amputees: intelligent knee prosthesis (IP) versus C-leg. Prosthet Orthot Int 2006; 30: 73–80.
10. Chin T, Sawamura S, Shiba R, et al. Effect of an Intelligent Prosthesis (IP) on the walking ability of young transfemoral amputees: comparison of IP users with able-bodied people. Am J Phys Med Rehabil 2003; 82: 447–451.

See all the Clinical Evidence for every Blatchford product in our Clinical Evidence Finder Tool.

SmartIP Technical Data

Max. User Weight:


Activity Level:


Component Weight:

1.27kg Stanceflex
1.15kg 4-Bolt

Build Height:


Control Unit:

Swing: MPK/Pneumatic
Stance: Mechanical

*Maximum user weight 100kg


Socket Adapters

SmartIP Socket Adapters


Part Numbers:

Stanceflex options:


4-Bolt options: