Sorry to be getting in late. Here's the opening couple of paragraphs from a good article published on the RSDSA site:

Workers' Compensation 101: An Overview of WC for Employees With Work-related CRPS
By R. Steven Shisler, Esquire

Workers' compensation (WC) laws generally vary from state to state. As I am admitted to practice law in Pennsylvania, this article only will address WC issues in accordance with Pennsylvania law. Explanations of the law and recommended strategies are not applicable to those whose claims fall outside of the Pennsylvania Workers' Compensation Act (PWCA). Also, because strategy and professional judgment are fact specific and may vary among claims, this article is written for your general knowledge only.

Lastly, if you are seriously injured at work, and especially if this results in CRPS, I strongly suggest that you retain an attorney as soon as possible after the injury. It is simply too dangerous to pursue your claim without counsel. Regardless of your relationship with your supervisor and the company, remember that your employer's insurance carrier controls the WC benefits and is most concerned about paying as little as possible. The attorney you retain must represent claimants (employees) in WC matters and also should have some knowledge of CRPS. . . .

Link to the rest of the article here: http://www.rsds.org/4/resources/wc_101html.htm