Joint stiffness was the most observed complication (26%). Arthrodesis, reconstructive flap surgery, and spongy bone grafts were the most practiced secondary surgeries (79% of secondary surgeries). Regarding the surgical treatment, performing an amputation stump was the most practiced primary surgery (107 cases i.e. Regarding clinical aspects, in 77% of cases, two or more fingers were injured, tip amputations of the left fingers predominated (49%), in 50% of the cases of hand wounds occurred to the dorsum of the hand, and extensor tendon injuries were observed twice more than flexor tendon injuries. The average age was 31.24 years, these patients were exclusively men, 62% were apprentice wood workers, and the left hand was twice more injured than the right hand.
Epidemiological features, treatment, and permanent disabilities left by hand trauma from circular saw table were studied to identify ways to prevent such an accident. It was a retrospective series about a 130 cases of hand trauma from circular saw table. Trauma of the hand from a circular saw table is a common occurrence in developing countries it tends to occur in young hand working people and it causes a serious lesions. We are presenting a complete strategy for such different tasks as cutting wedges, stopped cutting and hidden cutting, which have a very high odds ratio. The forces of the protective system peak at no more than 120 N. With a kind of light curtain the intrusion into the dangerous zone near the blade can be prevented.The safety guard protects the operator’s hand within 50 ms.
Table saw cut fingers skin#
Second the distinction between skin and wood or other material is done by dedicated kind of spectral analysis in the near infrared region. In a first approach a reliable protective device with functional diversity has been developed using a passive infrared sensor in combination with a capacitive field sensor. This paper describes several principles to distinct human skin and wood and a safety guard that prevents touching the rotating blade.
Table saw cut fingers manual#
The basic principles can be applied to other machines with manual loading and/or unloading. Several hundred accidents involving the use of circular saws and resulting in injury, to hands or fingers occur each year in Germany.In the presented project, new approaches for the prevention of hand injuries and for the contactless detection of fingers are being investigated for comprehensive protection on circular saws.
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