In this month’s installment, board-certified ergonomist Blake McGowan explains why the revised ACGIH Hand Activity TLV is a better predictor of hand, wrist, and forearm MSDs.
The revisions include:
- Lowering the acceptable limits for the normalized hand peak forces and hand activity level.
- Only considering hand exertions greater than 10% of strength capabilities
- Lowering the acceptable and unacceptable levels for the TLVs.
References: American Conference of Governmental Industrial Hygienists (ACGIH) Worldwide, 2018. Threshold Limit Values for chemical substances and physical agents in the work environment. Cincinnati, OH: ACGIH Worldwide; Yung M, Dale AM, Kapellusch J, Bao S, Harris-Adamson C, Meyers AR, Hegmann KT, Rempel D, Evanoff BA. (2019). Modeling the Effect of the 2018 Revised ACGIH® Hand Activity Threshold Limit Value® (TLV) at Reducing Risk for Carpal Tunnel Syndrome. J Occup Environ Hyg. 2019 Jul 30:1-6.