ISO 29783-2:2015

Overview

ISO 29783-2:2015, titled Prosthetics and orthotics - Vocabulary - Part 2: Prosthetic gait, is an international standard published by ISO that specifies a standardized vocabulary for describing the gait patterns of individuals with unilateral lower limb amputations using prosthetic limbs. This standard builds on ISO 29783-1, which covers normal gait, to provide clear, consistent terminology dedicated specifically to prosthetic gait abnormalities.

The absence of a globally accepted vocabulary for prosthetic gait has historically led to inconsistent communication among healthcare professionals, prosthetists, and rehabilitation teams across different countries. ISO 29783-2 addresses this gap by defining terms related to the gait cycle phases and typical deviations observed in trans-tibial and trans-femoral amputees during prosthetic use.

Key Topics

• Gait Cycle Sub-phases: The standard categorizes prosthetic gait into phases such as initial contact, loading response (weight acceptance), mid-stance, terminal stance (single support), pre-swing, and swing. Each phase is analyzed for typical abnormalities.

• Terminology for Gait Deviations: It defines abnormal joint movements and timing abnormalities, providing related terms such as:

  • Circumduction: Abnormal lateral swing of the prosthetic limb.
  • Hip hiking: Elevated pelvic movement during swing phase.
  • Vaulting: Increased plantarflexion of the contralateral ankle to aid clearance.
  • Whip: Medial or lateral deviation of the foot path during swing.

• Trans-tibial Amputation Gait: The vocabulary includes abnormal knee and hip joint behaviors at different gait sub-phases, such as knee hyperextension or increased flexion at initial contact, premature heel-off, and walking base variations.

• Trans-femoral Amputation Gait: The standard covers unique prosthetic gait characteristics such as knee unit instability, absent knee flexion during pre-swing, increased lumbar lordosis, and deviations in trunk and pelvic movements.

• Usage of Walking Aids: The document also defines terms to describe gait when enhanced by walking aids, specifying contralateral, prosthetic, or bilateral use.

• Gait Cycle Abnormalities: Unequal step length and timing, as well as narrow or wide walking base, are standardized to aid in systematic gait description.

Applications

ISO 29783-2:2015 is essential for:

• Clinical Prosthetics and Orthotics Teams: Facilitates consistent assessment and documentation of prosthetic gait patterns, improving communication across multidisciplinary teams.

• Rehabilitation Specialists: Helps physical therapists and clinicians identify specific gait abnormalities, enabling targeted interventions and monitoring progress.

• Research and Development: Provides a foundation for comparing prosthetic gait data internationally, supporting innovation in prosthetic design and fitting procedures.

• Education and Training: Offers a reference vocabulary for training practitioners in prosthetic gait analysis and care.

• Regulatory and Quality Assurance: Supports standardization in clinical reporting and prosthetic service delivery worldwide.

Related Standards

• ISO 29783-1:2015 - Prosthetics and orthotics - Vocabulary - Part 1: Normal gait
  Defines terminology for normal human gait, serving as the basis for understanding deviations detailed in Part 2.

• ISO 29783-3 - Prosthetics and orthotics - Vocabulary - Part 3: Pathological gait (planned)
  Expected to cover terminology related to pathological gait patterns beyond prosthetic use.

• ISO/IEC Directives
  Guidelines for the development and maintenance of ISO standards, ensuring consistency and quality.

By adopting ISO 29783-2:2015, healthcare providers and prosthetic experts globally can achieve improved clarity and precision in gait descriptions, ultimately enhancing the quality of care for lower limb amputees and supporting innovation in prosthetic technologies. Keywords: prosthetic gait vocabulary, lower limb amputation gait, trans-tibial amputation, trans-femoral amputation, prosthetic gait analysis, gait abnormalities, ISO prosthetics standards.