Background: Although injuries due to circular saws are very common all over the world, there is surprisingly little
information available about their functional outcomes. As the socioeconomic impact of these injuries is immense
and determined by the casualties’ disability and impairment, it is the objective of this study to present data on the
functional outcome, disability, and impairment of hand injuries due to electric circular saws.
Methods: Patients treated from 1999 through 2007 for circular saw-related hand injuries were contacted and asked
for clinical follow-up assessment. The clinical follow-up protocol consisted of a physical examination and an
assessment of static muscle power (grip and pinch strength). For assessment of the subjective experience of the
patients regarding their injury-related disability and impairment, the DASH follow-up questionnaire was used. The
occupational impact of these injuries was measured by number of lost working days. Finally, safety-related
behaviour of the patients was investigated.
Results: 114 Patients were followed-up on average 52 months after the injury. Average in-house treatment was
8.8 days. Average time lost from work was 14.8 weeks. A significant reduction of static muscle testing parameters
compared with the uninjured hand was revealed for grip strength, tip pinch, key pinch, and palmar pinch. Average
DASH score was 17.4 (DASH work 15.8, DASH sports/music 17.7). Most patients had more than ten years
experience in using these power tools.
Conclusion: The everyday occurrence of circular saw-related hand injuries followed by relatively short periods of
in-house treatment might distort the real dimension of the patients’ remaining disability and impairment. While the
trauma surgeon’s view is generally confined to the patients’ clinical course, the outcome parameters in this followup
investigation, with loss of working time as the key factor, confirm that the whole socioeconomic burden is
much greater than the direct cost of treatment