ISO TS 16955-2016 PDF

Full title and description

ISO/TS 16955:2016 — Prosthetics — Quantification of physical parameters of ankle-foot devices and foot units. This technical specification defines standardized, quantitative measurement methods and test set-ups to characterise key physical and performance-related parameters of prosthetic ankle‑foot devices and foot units, enabling repeatable laboratory characterisation that supports comparison, development and selection of prosthetic feet.

Abstract

ISO/TS 16955:2016 provides methods to evaluate or assess key performance indicators of prosthetic ankle-foot devices and foot units. For each method the technical specification describes the test configuration, instrumentation and derived or calculated parameters from recorded data. The document focuses on measurement methods (the quantification step) and does not itself establish clinical correlations to user benefit.

General information

• Status: Published.
• Publication date: June 2016 (Edition 1, 2016-06).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 11.040.40 (Implants for surgery, prosthetics and orthotics).
• Edition / version: Edition 1 (2016).
• Number of pages: 17 pages.

Scope

Specifies quantitative laboratory methods to characterise physical parameters of ankle‑foot prosthetic devices and foot units. The scope covers test rig configuration, sensor placement (including multidimensional force/torque sensors), test profiles and the set of parameters to be derived from the measured signals. The technical specification is intended to standardize mechanical characterization procedures; establishing clinical correlations to user benefit is identified as a separate activity beyond the methods described.

Key topics and requirements

• Definition of test set‑ups and configurations for measuring ankle‑foot device behaviour (mechanical interfaces, platform geometry and kinematics).
• Instrumentation guidance: use of multi‑axis force/torque sensors, displacement/angle measurement and dynamic data acquisition to capture stance‑phase behaviour.
• Procedures for dynamic measurements covering heel strike through toe‑off to capture functional parameters experienced by users.
• Specification of derived parameters and calculations (e.g., stiffness, hysteresis/energy return, force/torque profiles, timing metrics) to enable objective comparison between devices.
• Emphasis on repeatability and avoidance of test artifacts (for example, controlling gliding elements) to ensure sensitive measurements are not masked.

Typical use and users

Used by prosthetic foot manufacturers for product development and quality characterisation, independent testing laboratories that provide performance data, research groups studying prosthetic biomechanics, and clinicians or procurement bodies seeking objective comparative data to inform prescription and reimbursement decisions. The methods support development of test rigs and evaluation protocols that bridge laboratory measures and clinical outcomes.

Related standards

Closely related ISO documents include the structural testing and strength standards ISO 10328:2016 (structural testing of lower‑limb prostheses), and the ankle‑foot device test methods ISO 22675 (2016 edition, later editions and updates). ISO 22523 (external limb prostheses and orthoses — requirements and test methods) is also relevant for broader device requirements and context. These documents are complementary: ISO/TS 16955 focuses on quantitative characterization methods, while ISO 10328 and ISO 22675 address structural strength and cyclic/static test procedures.

Keywords

prosthetics, ankle-foot devices, foot units, prosthetic foot characterisation, test methods, dynamic measurement, stiffness, energy return, force/torque measurement, ISO/TC 168.

FAQ

Q: What is this standard?

A: ISO/TS 16955:2016 is an ISO Technical Specification that defines laboratory measurement methods to quantify physical and performance parameters of prosthetic ankle‑foot devices and foot units.

Q: What does it cover?

A: It covers test rig configurations, sensor and instrumentation guidance, dynamic measurement procedures (stance‑phase capture) and the list of derived parameters and calculations used to describe device mechanical behaviour. It does not itself set clinical performance limits or directly establish clinical outcome correlations.

Q: Who typically uses it?

A: Prosthetic device manufacturers, independent testing laboratories, biomechanics researchers and clinicians involved in device evaluation or evidence generation use the specification to produce reproducible, comparable mechanical characterisations of prosthetic feet.

Q: Is it current or superseded?

A: ISO/TS 16955:2016 is published (June 2016) as a Technical Specification. ISO documents are periodically reviewed; users should check the ISO catalogue or national standards bodies for any revision, replacement or confirmation status. Related test standards (for example ISO 22675) have been revised in subsequent years (see ISO 22675 updates).

Q: Is it part of a series?

A: It sits within the ISO/TC 168 family of prosthetics and orthotics standards and is complementary to other ISO standards on prosthetic testing and requirements such as ISO 10328, ISO 22675 and ISO 22523. These documents together address structural testing, cyclic/static verification and broader device requirements.

Q: What are the key keywords?

A: Key keywords include prosthetics, ankle‑foot device, foot unit, test methods, performance characterisation, dynamic testing, stiffness, energy return and force/torque measurement.