The Assisting Hand Assessment (AHA) is a standardized, reliable, and valid tool used to evaluate the functional performance of the upper limb in individuals with hemiplegia, following a stroke or other neurological conditions. The AHA scoring system provides a quantitative measure of an individual's ability to use their affected hand in daily activities, helping clinicians and researchers track progress and plan interventions. This article delves into the intricacies of the AHA scoring, its administration, and interpretation.
Understanding the Assisting Hand Assessment
The AHA was developed by Dr. Helen McLellan and her colleagues at the University of Alberta, Canada. It consists of 22 tasks that simulate everyday activities, such as picking up objects, manipulating them, and releasing them. The tasks are designed to challenge the individual's ability to use their affected hand in a functional manner, with or without assistance from their non-affected hand.
Administering the Assisting Hand Assessment
Administering the AHA involves a few simple steps:
- Ensure the individual understands the task and the scoring system.
- Provide standard objects and materials for each task.
- Allow the individual to use their affected hand as they wish, with no restrictions on the use of their non-affected hand or other body parts.
- Score each task based on the observed performance.
Scoring the Assisting Hand Assessment
The AHA scoring system is based on a 4-point ordinal scale, with higher scores indicating better functional performance. The scale is as follows:
| Score | Description |
|---|---|
| 1 | Unable to perform the task |
| 2 | Performs the task with significant difficulty and/or assistance |
| 3 | Performs the task with some difficulty |
| 4 | Performs the task easily and efficiently |
The total score is the sum of the scores for each of the 22 tasks, with a maximum possible score of 88. The AHA can be administered by trained occupational therapists, physiotherapists, or other healthcare professionals.
Interpreting Assisting Hand Assessment Scores
Interpreting AHA scores involves considering the individual's performance across the 22 tasks, rather than focusing on the total score alone. A high total score may indicate good functional performance, but it is important to consider the quality of the movement and the strategies used to complete each task.
For example, an individual may achieve a high score by using their non-affected hand to complete the task, rather than relying on their affected hand. This strategy, while effective, may not reflect the individual's true ability to use their affected hand in daily activities. Therefore, it is important to observe and document the strategies used during each task, in addition to the total score.
Regular AHA assessments can help track an individual's progress over time, providing valuable insights into the effectiveness of interventions and the need for further treatment. The AHA is a powerful tool for clinicians and researchers, enabling objective, standardized evaluation of upper limb function in individuals with hemiplegia.
