Carpal tunnel syndrome claim goes to trial

Douglas R. Tenbarge worked as a drywall installer from 1983 to 1993. He used a tool known as an Auto Taper, manufactured by Ames Taping Tool Systems Inc. The taper, also known as a Bazooka, consisted of a 56-in. long tube filled with joint compound and tape. It was used to apply joint compound and tape simultaneously to drywall seams. The Bazooka weighed 7 lb when empty and 20 lb when full. Operating the tool required repetitive wrist motions and the exertion of considerable pressure to apply the tape and compound.

In 1992, Tenbarge consulted a doctor about numbness in his hands and fingers. He was diagnosed with carpal tunnel syndrome. In December 1992 and January 1993, Tenbarge underwent surgery on both wrists. He returned to work in April 1993 but sustained an elbow injury and underwent a third surgery late in 1993.

In 1994, Tenbarge sued Ames, the maker of the Bazooka, claiming the taping tool was the cause of his carpal tunnel syndrome. He claimed that the tool was dangerous and that Ames had been negligent in failing to warn of the danger of injury resulting from the use of the tool. The federal trial judge granted Ames summary judgment before trial.