Table 3
Finger blood flow3-151 measured in the unexposed (left) middle finger of 10 healthy subjects before, during and after exposure to 125 Hz vibration with varying acceleration magnitudes and durations but with the same 8 hour energy equivalent frequency weighted acceleration magnitude (∼1.4 m/s2) as the time dependency recommended by international standard ISO 5349 (1986)
| Vibration 44 m/s2, 30 min | Vibration 62 m/s2, 15 min | Vibration 88 m/s2, 7.5 min | Vibration 125 m/s2, 3.75 min | Vibration 176 m/s2, 1.88 min | |
| Before exposure | 20.0 (2.9) | 14.5 (1.8) | 15.8 (1.0) | 16.1 (3.0) | 18.0 (2.6) |
| Exposure (min): | |||||
| E 0.5 | 18.9 (2.3) | 13.5 (1.0) | 14.8 (2.1) | 15.3 (2.6) | 15.5 (2.7) |
| −0.7% (−14.9% to 13.4%) | −1.3% (−16.4% to 13.8%) | −2.6% (−24.6% to 19.4%) | +9.0% (−28.6% to 46.7%) | −14.1% (−33.1% to 4.9%) | |
| E 1.5 | 17.1 (2.0) | 13.7 (1.5) | 13.7 (2.0) | 14.8 (2.8) | 14.6 (2.5) |
| −7.1% (−26.5% to 12.4%) | +4.8% (−25.6% to 35.2%) | −9.9% (−27.9% to 8.2%) | −0.3% (−29.1% to 28.6%) | −11.8% (−45.2% to 21.6%) | |
| E 3.5 | 15.9 (1.6) | 13.2 (1.0) | 13.7 (1.8) | 14.5 (2.3) | — |
| −11.0% (−34.8% to 13.1%) | +4.7% (−26.7% to 36.2%) | −6.5% (−29.8% to 16.9%) | −0.2% (−33.5% to −33.1%) | ||
| E 5.5 | 15.9 (1.5) | 13.0 (1.4) | 11.5 (1.8) | — | — |
| −12.2% (−32.1% to 7.8%) | −2.9% (−25.6% to 19.8%) | −20.5% (−46.5% to 5.5%) | |||
| E 7.5 | 15.5 (1.1) | 12.8 (0.9) | 11.2 (1.9) | — | — |
| −8.5% (−36.6% to 19.5%) | −3.3% (−25.8% to 19.2%) | −22.5% (−48.7% to 3.8%) | |||
| E 15 | 14.4 (1.7) | 13.5 (1.6) | — | — | — |
| −13.8% (−52.8% to 25.1%) | +2.5% (−29.0% to 34.0%) | ||||
| E 22.5 | 14.2 (1.8) | — | — | — | — |
| −19.7% (−47.7% to 8.4%) | |||||
| E 30 | 13.7 (1.2) | — | — | — | — |
| −22.5% (−2.6% to −42.4%) | |||||
| Recovery (min): | |||||
| R 0.5 | 18.6 (1.6) | 16.0 (1.9) | 18.1 (2.1) | 17.8 (2.1) | 17.1 (2.8) |
| +4.9% (−22.9% to 32.8%) | +12.9% (−13.0% to 38.8%) | +17.2% (−2.4% to 36.7%) | +11.0% (−31.1% to 53.1%) | −2.9% (−28.8% to 23.0%) | |
| R 1.5 | 18.0 (1.9) | 16.1 (2.2) | 16.1 (2.7) | 14.8 (2.0) | 17.8 (2.7) |
| −1.5% (−23.7% to 20.6%) | +14.1% (−20.7% to 49.0%) | −0.2% (−22.9% to 22.5%) | −8.0% (−28.9% to 12.9%) | +1.4% (−20.2% to 23.0%) | |
| R 3.5 | 15.7 (1.7) | 15.9 (1.8) | 17.9 (2.3) | 18.9 (3.3) | 17.1 (2.9) |
| −10.1% (−42.7% to 22.4%) | +16.6% (−16.4% to 49.6%) | +15.0% (−5.5% to 35.6%) | +20.0% (−8.4% to 48.4%) | −5.5% (−26.6% to 15.6%) | |
| R 5.5 | 15.2 (1.9) | 17.0 (2.2) | 17.9 (2.7) | 17.1 (2.6) | 19.2 (3.8) |
| −14.7% (−40.7% to 11.4%) | +18.9% (0.8% to 37.1%) | +13.1% (−9.3% to 35.5%) | +15.9% (−11.6% to 43.5%) | +3.3% (−27.8% to 34.4%) | |
| R 7.5 | 14.5 (1.9) | 14.9 (2.1) | 16.2 (2.2) | 16.4 (2.4) | 19.5 (3.0) |
| −19.9% (−42.3% to 2.6%) | +6.4% (−21.1% to 34.0%) | +4.9% (−14.9% to 24.7%) | +12.2% (−16.6% to 41.1%) | +11.3% (−15.6% to 38.2%) | |
| R 15 | 15.1 (2.2) | 13.1 (2.1) | 16.5 (2.1) | 16.7 (2.1) | 18.5 (3.3) |
| −8.1% (−59.3% to 43.1%) | −8.2% (−38.7% to 22.3%) | +11.5% (−15.9% to 38.9%) | +17.1% (−10.9% to 45.3%) | +5.0% (−26.7% to 36.7%) | |
| R 22.5 | 9.9 (1.4) | 11.2 (1.1) | 15.3 (2.1) | 16.7 (2.3) | 17.5 (2.7) |
| −38.5% (−5.1% to −71.9%) | −17.5% (−39.6% to 4.6%) | −0.4% (−22.5% to 21.7%) | +15.3% (−26.3% to 57.0%) | −2.9% (−22.0% to 16.2%) | |
| R 30 | 7.5 (0.9) | 9.6 (1.0) | 14.0 (1.8) | 16.3 (2.3) | 15.6 (2.3) |
| −55.9% (−37.8% to −74.1%) | −31.0% (−17.7% to −44.2%) | −4.6% (−30.4% to 21.2%) | +15.9% (−22.6% to 54.6%) | −8.1% (−35.9% to 19.7%) | |
| R 37.5 | 7.4 (1.2) | 7.7 (1.3) | 13.3 (1.7) | 14.8 (2.2) | 18.0 (2.5) |
| −52.3% (−24.0% to −80.6%) | −47.2% (−31.6% to −62.8%) | −9.7% (−35.3% to 15.9%) | −4.0% (−45.2% to 37.2%) | +6.3% (−18.9% to 31.5%) | |
| R 45 | 6.9 (1.0) | 7.7 (1.0) | 12.6 (1.8) | 13.6 (2.0) | 14.9 (2.2) |
| −57.6% (−38.0% to −77.2%) | −42.9% (−24.8% to −61.0%) | −16.0% (−36.9% to 4.9%) | −10.0% (−51.2% to 31.2%) | −6.5% (−37.5% to 24.5%) | |
| ANCOVA (p value)3-150 | 0.0002 | 0.013 | 0.03 | 0.48 | 0.36 |
