Dellon developed a generic numerical grading scale for evaluating the function of a peripheral nerve. The precise limits can be modified for an individual nerve. The author is from the Johns Hopkins University in Baltimore.
Parameters:
(1) sensory function, paresthesias
(2) sensory function, vibration or pressure
(3) sensory function, 2 point discrimination
(4) motor function
|
Parameter |
Finding |
Grade |
|
sensory, paresthesias |
none |
0 |
|
|
intermittent paresthesias |
1 |
|
|
persistent paresthesias |
5 |
|
sensory, vibration or pressure |
normal |
0 |
|
|
abnormal threshold to vibration or pressure, mild |
3 |
|
|
abnormal threshold to vibration or pressure, severe |
4 |
|
|
complete anesthesia |
9 |
|
sensory, 2 point discrimination |
normal |
0 |
|
|
abnormal 2 point discrimination (static or moving), mild |
6 |
|
|
abnormal 2 point discrimination (static or moving), severe |
8 |
|
|
complete anesthesia |
9 |
|
motor function |
normal |
0 |
|
|
mild weakness |
2 |
|
|
moderate weakness |
4 |
|
|
mild to moderate muscle wasting (atrophy) |
7 |
|
|
severe muscle wasting (atrophy) |
10 |
The overall grade is the maximum grade (range from 0 to 10).
Interpretation:
• minimum grade: 0
• maximum grade: 10
• The higher the grade the more severe the loss in peripheral nerve function.
Specialty: Neurology
ICD-10: ,
