Shares of Zynex Inc. (OTCBB: ZYXI) climbed 17% to $6 Friday afternoon after the company reported its second quarter financial results for 2008, posting triple-digit increases for the period ended June 30, 2008. Zynex engineers, manufactures, markets and sells its own design of electrotherapy medical devices, focusing on standard digital electrotherapy products for pain relief and pain management, as well as NeuroMove for stroke and spinal cord injury (SCI) rehabilitation.