St. Jude Medical (STJ, news, chart) is seeing bullish order flow. The stock sits unchanged at $47.50 a share and 6,500 calls have traded on the day, compared to 2,400 puts. 3,100 of the October 50 calls traded, with 85 percent trading offerside. Another 2,600 of the September 50s traded, with 82 percent hitting on the offer. St. Jude Medical announced today that it has received Japanese approval for its Durata next generation high voltage difibrillator lead. No other news today. Earnings due out in mid October.