betadine and alcohol intravenous preparations

Background
It stands to reason that some type of preparation needs to occur before an IV needle is inserted into a vein. For one thing, even as sterile as the needle might be, this is still a foreign object being introduced into the body -- and as such, the body will likely bring its defenses to do everything it can to reject the foreign object. For another thing, the skin itself is a breeding ground for microorganisms. Once a puncture is made into the skin and vein, this is a excellent entry point for skin flora and microorganisms to invade the body, creating all types problems such as bloodstream infections.
Because of this, specific medical guidelines among Western countries insist that the entry site of an IV catheter be adequately prepared before the needle is actually inserted. Preparation generally includes a swabbing of the entry site with an antibacterial, antiseptic solution. The theory behind such an action is that preparing the skin within antiseptic solution greatly...