1.4 Gait or Mobility

Definition: Gait analysis includes observational gait analysis as well as instrumented gait analysis. This analysis may be performed with or without a prosthesis/orthosis and can include different kinds of mobility aids. May involve any or all of the following codes:

Code	Procedure	Description
1	Observational gait analysis (visual non-instrumental)	Observational gait analysis combines observation of the temporal parameters of gait with kinematics (joint angles). Individual’s gait is evaluated from frontal and sagittal planes.  Deviations are identified.   Information is collected subjectively during the functional evaluation. Observations are qualitative and involve all body segments.  Observed data includes any deviation from normal function during any phase of pathological gait compared to normal gait.
2	In-office (on-site) Foot only systems – single step analysis	Includes internal (In-shoe) plantar pressure sensors and external (floor placement) single step mats. Data can be recorded in static (standing) or dynamic (walking or running) conditions. Data captured may include contact pressure distribution, force, timing, and centre of pressure, postural and/or balance information.
3	In-office (on-site) hardware and software – multiple step analysis	Includes internal (in-shoe) plantar pressure sensors and external (floor placement) single step mats. Data can be recorded in static (standing) or dynamic (walking or running) conditions. Data captured may include contact pressure distribution, force, timing, and centre of pressure, postural and/or balance information.
4	In-office (on-site) video with on-line software analysis – multiple step analysis	Video data capture requirements are determined by the on-line software being used.  Different systems may allow for: 1.       A “free” video – low-tech, no markers, in-house but on-line supplied tools and “clean-up” (this could become more common once the technology adapts to real life situations) 2.       Video with in-office calibration e.g. measurement indicators, specific camera placement, anatomical markers or other requirements for capturing the data necessary for on-line analysis 3.       Simultaneous data capture using video and pressure mats which can be analyzed on-line
5	In-office evaluation (using on-line or in-office software) of externally provided raw data	In-depth analysis of gait lab type data (e.g. Vicon lab).
6	Review of gait lab report/results	Complete review of findings.  No reworking of data.
7	Body mounted systems	Non-video (or pressure mat) data capture of gait information. may include simple pedometers or more complex devices, which collect a variety of data. This method enables simple measurements and kinematic calculations with small body-mounted instruments utilizing accelerometers and gyroscopes. Temporal parameters of gait are determined by classification of accelerations and angular velocities