Poole et al reported International Consensus Criteria for staging hand-arm vibration syndrome (HAVS). The authors are from multiple institutions in the United Kingdom, Italy, Sweden and Canada.
Patient selection: suspicion of hand-arm vibration syndrome (HAVS)
Parameters:
(1) blanching in digits
(2) sensory changes in digits lasting > 20 minutes
Digit blanching is measured in each finger of a hand according to the following scheme:
Portion of Finger
Points
no blanching
0
blanching proximal phalanx
1
blanching middle phalanx
2
blanching of distal (whole finger)
3
The thumb would have proximal and distal phalanx scored.
digit blanching score =
= SUM(points for all 5 fingers)
The minimum digit blanching score is 0 and maximum 15.
Parameter
Finding
ICC Stage
vascular component
digit blanching score 0
0V
digit blanching score 1 to 4
1V
digit blanching score 5 to 12
2V
digit blanching score >=13
3V
neurological component
no numbness or tingling
0N
intermittent numbness and/or tingling
1N
loss of sensory perception in 1 or more fingers
2N
impaired dexterity
3N
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