IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

News release

Are your fingers white and numb?

  • March 06, 2017

Montréal, March 6, 2017 – Hypothenar Hammer Syndrome (HHS) is an insidious disease that can be easily confused with other disorders, such as hand-arm vibration syndrome or Raynaud’s disease, which are also characterized by blanched fingers. To alert employers and workers, the Institut de recherche Robert-Sauvé en santé et en sécurité du travail has published an information pamphlet entitled Recognizing Hypothenar Hammer Syndrome.

HHS is a rare and little-known disease that can lead to serious injury in the affected fingers and could even result in their amputation, if the diagnosis and the treatment are not appropriate. The disease develops in workers who use vibrating tools or who repeatedly use the palms of their hands to strike, flatten, press or twist objects. Even a single episode of trauma could cause the disease. These ways of working can cause a reduction in blood flow circulating into the fingers, especially the middle, ring and little fingers.

“Workers should be vigilant and they should not wait before consulting a physician to avoid severe complications. Certain symptoms such as white or blue fingers that are stiff and painful are easily observable. Often, the affected hand will be hypersensitive to cold, it will lose strength, and there will be a sensation of pins and needles or numbness in the fingers. To prevent the syndrome, workers should, first and foremost, not use their hand as a hammer, and they should not grip tools such as impact wrenches, pliers, scissors and even vehicle gearshifts too tightly,” cautions Dr. Alice Turcot of the Institut national de santé publique du Québec, principal author of a study entitled Vibrations mains-bras – Caractérisation du syndrome du marteau hypothénarien chez les travailleurs utilisant des outils manuels.

syndrome vibratoire ou maladie de Raynaud

The workers most vulnerable to HHS are machinists, construction workers, miners, mechanics, forestry workers and farmers. A number of tools can cause HHS, including electrical or pneumatic vibrating tools, brush cutters/trimmers, milling machines, grinding machines, jackhammers, impact wrenches, pliers and presses.

The HHS prevention pamphlet can be consulted at no cost at http://www.irsst.qc.ca/en/publications-tools/publication/i/100918/n/hypothenar-hammer-syndrome. For more information about the IRSST and its research projects, follow us on Web, Twitter, Facebook, LinkedIn ou YouTube.

 

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Source
Jacques Millette
Manager of Public Affairs
IRSST