In Barraza v. Eureka Co., 25 S.W.3d 225, 230 (Tex.App.--El Paso 2000, pet. denied), the plaintiff sued her employer claiming that she suffered injury to her hands and wrists as a result of repetitive movements during the continual use of manual machines. Id. at 227. The expert, an industrial engineer, summarized the testimony of several employees as to the injuries they had received and concluded that the company's continual use of the manual machines constituted negligence which was the proximate cause of the plaintiff's injury. Id. The court determined that as an engineer, the expert was not qualified to render a medical opinion.