A) | ||
---|---|---|
STAGE | GRADE | DESCRIPTION |
0 | None | No attacks |
1 | Mild | Occasional attacks affecting the tips of ≥ 1 fingers |
2 | Moderate | Occasional attacks affecting distal and middle (rarely also proximal) phalanges of ≥ 1 fingers |
3 | Severe | Frequent attacks affecting all phalanges of most fingers |
4 | Very severe | As in stage 3, with trophic changes in the fingertips |
B) | |
---|---|
STAGE | DESCRIPTION |
0SN | Exposed to vibration but no symptoms |
1SN | Intermittent numbness with or without tingling |
2SN | Intermittent or persistent numbness, reduced sensory perception |
3SN | Intermittent or persistent numbness, reduced tactile discrimination or manipulative dexterity |
HAVS—hand-arm vibration syndrome, SN—sensorineural.