[a] Diagnostic algorithm | Exposure limit values [b] | Medical score sum [c]: Low (0-4) | Medical score sum [c]: Mediun (5-9) | Medical score sum [c]: High (10-21) | |
 | Hg in all biomonitors <HBM I | no intoxication | no intoxication | no intoxication | |
 | Hg in at least one biomonitor >HBM I and <HMB II | no intoxication | no intoxication | intoxication | |
 | Hg in at least one biomonitor >HBM II and <BAT | no intoxication | intoxication | intoxication | |
 | Hg in at least one biomonitor >BAT | intoxication | intoxication | intoxication | |
[b] Exposure limit values* for mercury in human biomonitoring samples | Exposure limit values | Hg in blood (μg/l) | Hg in urine (μg/l) | Hg in urine (μg/g crea.) | Hg in hair (μg/g) |
 | <HBM I | 0-<5 | 0-<7 | 0-<5 | 0-<1 |
 | >HBM I and <HBM II | 5-<15 | 7-<25 | 5-<20 | 1-<5 |
 | >HBM II and < BAT | 15-<25 | 25-<30 | 20-<25 | ≥5 |
 | >BAT | ≥25 | ≥30 | ≥25 |  |
c] Indicators of the medical score sum | Anamnesis | Clinical examination | Neuropsychological tests | ||
(0/1): 0= negative; 1= positive; (0/1/2): 0= good, 1= restricted, 2= poor performance; maximum medical score sum: 21 points | Metallic taste (0/1) | Bluish coloring of the gingiva (0/1) | Frostig test1 (0/1/2) | ||
 | Excessive salivation (0/1) | Ataxia of gait (0/1) | Matchboxtest2 (0/1/2) | ||
 | Tremor at work (0/1) | Finger-to-nose tremor (0/1) | Memory test3 (0/1/2) | ||
 | Sleeping problems at night (0/1) | Dysdiadochokinesia (0/1) | Pencil tapping test4 (0/1/2) | ||
 | Health problems worsened since | Heel-to-knee ataxia (0/1) |  | ||
 | having been exposed to | Heel-to-knee tremor (0/1) |  | ||
 | mercury (0/1) | Mento-labialreflex (0/1) |  | ||
 |  | Proteinuria (0/1) |  |