Should You Perform a Formal Assessment Before Prescribing a Cane?
Yes, you should perform a formal assessment before prescribing a cane, focusing specifically on gait stability, balance, functional mobility needs, and proper fitting to maximize safety and prevent falls.
Key Assessment Components
The evidence strongly supports that assistive device prescriptions should be individualized based on careful evaluation rather than simply providing a cane upon request 1. Here's the algorithmic approach:
1. Determine Medical Necessity
Evaluate whether the patient truly needs a cane by assessing:
- Gait impairments: Look for unstable or inefficient walking patterns
- Balance deficits: Assess postural stability and fall risk
- Functional mobility: Determine if the patient can ambulate safely without assistance
- Confidence in walking: Many patients report improved walking confidence with assistive devices 1
Critical finding from research: If a patient cannot load more than 40% of their body weight on their affected lower limb during standing, the probability of walking safely without a cane is less than 5% 2. This provides an objective criterion for cane necessity.
2. Conduct Specific Physical Assessments
Balance and Postural Testing:
- Measure postural asymmetry (percentage of body weight on each lower limb)
- Assess mediolateral instability (center-of-pressure variance >7 mm² indicates significant instability) 2
- Perform a "get up and go test" - patient should be able to rise from bed, turn, and steadily ambulate 3
Gait Evaluation:
- Observe walking speed, step length, and functional ambulation category
- Assess for fall risk factors including difficulty with gait and balance 3
3. Select the Appropriate Device Type
Not all canes are equal. Match the device to the patient's specific needs 1:
- Single-point cane: For patients needing minimal balance support with limited improvement in stability
- Quad cane: Provides more stability than single-point (reduces postural sway more effectively in stroke patients) but is heavier and bulkier 1
- Tripod cane: Intermediate option with 3 points of contact
- Walker: Consider if patient needs more body weight support than a cane can provide
4. Ensure Proper Fitting
This step is critical and frequently neglected 4. Common problems identified in community-dwelling older adults include:
- Incorrect cane height (most common error)
- Lack of medical consultation for device selection
- Improper maintenance 4
Proper fitting criteria:
- Cane length should be appropriate to the patient's height and arm length
- Canes need rubber tips for traction 5
- Health care workers fit canes more appropriately than non-healthcare workers 6
5. Determine Correct Hand Placement
The cane should typically be held in the hand opposite to the affected or weaker side. However, research suggests that comfort and enhanced confidence may sometimes outweigh rigid adherence to this rule 6.
6. Provide Training
This is where most prescriptions fail. Simply handing a patient a cane is insufficient 4, 7:
- Train on proper reciprocal gait pattern (cane moves forward with opposite leg)
- Educate on proper posture during ambulation
- Demonstrate correct technique for stairs, uneven surfaces
- Warn that improper use increases fall risk 7
Common Pitfalls to Avoid
Prescribing without assessment: Studies show that lack of medical consultation for device selection is a major problem, leading to improper use and increased fall risk 4
Ignoring that canes have demands: Canes require adequate upper extremity strength, coordination, and cognitive capacity. They increase metabolic demands and can interfere with balance in certain situations 7
Assuming all patients need long-term use: Many patients need adaptive devices early during rehabilitation but won't require long-term use. This should factor into your prescription decision 1
Failing to reassess: A patient's needs change over time. Some may progress beyond needing a cane; others may require more substantial support 1
Special Considerations
For stroke patients specifically: More than half require an assistive device, most frequently a cane. Studies show that ambulatory function (speed, step length) improves with a cane, and patients prefer walking with an assistive device rather than delaying walking to achieve a normal gait pattern 1.
For arthritis/chronic pain patients: If pain during activities of daily living impedes functioning, orthotics or assistive devices can be offered. Consider referral to occupational therapy for proper fitting and training 8.
Environmental factors: The prescription should account for where the device will be used - home environment, outdoor use, stairs, etc. 1, 5.
Documentation Requirements
Document your assessment including:
- Specific gait and balance deficits identified
- Rationale for device selection
- Fitting measurements
- Training provided
- Plan for reassessment
The bottom line: A cane prescription requires the same rigor as any other medical intervention. The evidence clearly shows that proper assessment, fitting, and training significantly impact outcomes, while failure to do so increases fall risk and reduces functional benefit 4, 7, 6.