Choosing a technical walking aid (TWA) is not just about preferring a cane to a walker. It’s based on a detailed analysis of several functional and clinical factors. Understanding these parameters allows for prescribing a device adapted to the patient’s situation, rehabilitation goal, and environment.
Main Selection Criteria
Here are the elements to consider when determining the most appropriate aid:
- Number of ground supports: depending on whether you’re looking to stabilize, partially or completely unload a limb.
- Support mode: continuous (permanent) or intermittent (occasional).
- Lateralization of the impairment: unilateral (e.g., hemiparesis) or bilateral (e.g., myopathic impairment).
- Number of available hands: one or two, depending on potential limitations (injuries, need to keep a hand free, etc.).
Types of Walking Aids and Associated Clinical Situations
Classic Walker
- Support: bilateral, symmetrical, and continuous
- Support rhythm: 3-3-3-3…
- Objective: triple each support to optimize stability
Benefits
- Great stability and comfort
- Symmetry of support
- Constant and smooth assistance
Disadvantages
- Bulky, not well-suited for confined spaces
- Requires the use of both hands
Two Crutches – Case 1: Alternating Partial Unloading
- Support: bilateral, symmetrical, and intermittent
- Rhythm: 3-1-3-1-3-1…
- Objective: triple only one support (e.g., after surgery or unilateral injury)
Benefits
- Good maneuverability
- Allows for modulating unloading
- Suitable for various terrains
Disadvantages
- Requires some coordination
- Often induces step asymmetry
- Intermittent, non-permanent assistance
- Both hands used
Two Crutches – Case 2: Complete Unloading
- Support: bilateral, symmetrical, and intermittent
- Rhythm: 1-2-1-2-1-2…
- Objective: completely replace one support (no weight-bearing on one limb)
Benefits
- Allows for complete unloading
- Valuable when weight-bearing is contraindicated
Disadvantages
- Requires significant upper limb strength
- Less smooth
- Tiring over long distances
- Both hands used
Two Crutches – Case 3: Balanced Alternating Support
- Support: bilateral, alternating, and intermittent
- Rhythm: 2-2-2-2…
- Objective: double each support while maintaining a balanced rhythm
Benefits
- Good compromise between stability and autonomy
- Suitable for smoother walking
Disadvantages
- Motor coordination essential
- Requires the use of both hands
One-handed Walker (Wheeleo®)
- Support: unilateral and continuous
- Rhythm: 2-2-2-2…
- Objective: double each support with unilateral assistance
Benefits
- Continuous aid without bilateral encumbrance
- Frees one hand to interact with the environment
- Promotes smooth and natural walking
- Good maneuverability
Disadvantages
- Maximum efficiency on even ground
- Less suitable for irregular or complex outdoor environments
One Crutch
- Support: unilateral and intermittent
- Rhythm: 2-1-2-1-2-1…
- Objective: temporarily double one support
Benefits
- Lightweight device, easy to carry
- One hand remains free
- Suitable for moderate disorders
Disadvantages
- Requires good postural balance
- Stabilizes only one side
Interpreting Support Rhythms
Each walking rhythm indicates a level of stability:
- 1: single-leg support (unstable)
- 2: one foot + one support (moderate balance)
- 3: one foot + two simultaneous supports (maximum stability)
An unstable patient will spontaneously seek to avoid single-leg support and adopt a three-beat gait, which is more secure.
Conclusion
There is no universal aid: each clinical situation calls for individualized consideration. The number of support points, their continuity, the lateralization of the impairment, and the patient’s functional capabilities will guide your choice. The goal is not simply to offer assistance, but to support a process of functional recovery, empowerment, or sustainable compensation.