I am inÂ a continuous state of disbelief surrounding the various "experts" that are constantly negating the true benefits of positive pressure connectors. I am a seasoned clinician, researcher, and have been following this topic for many years. Each and every hospital that I have worked at has had nothing but positive results from utilizing positive pressure devices. Currently, my facility uses a positive pressure device (not a mechanical valve) which features a flat surface that can be cleaned without any contamination of the hub. Also, the housing is clear which permits for visual observation of the fluid path. For several years we have been using this particular device with amazing results (both decreased Infection and Occlussion rates). It kills me to see all of the Nurses, Physicians, and Infection Control Practitioners who are frequently "blinded" by the various conartist researchers who are paid off by the sponsors that they consult for. Don't get me started, as I can easily divulge information about these "experts" that will quickly change your opinions about their credibility. These various "conartist" strategies recommend not using positive pressure mechanical valaves, and also don't clarify the specifics surrounding the different products in comparison. Rather, they choose to "lump" everything into a "positive pressure" category. The devices out there are all very different, and I love to see the "conartist experts" flipping their ideas on a monthly basis...confusing everyone within the industry who relies on their un-scientific studies and self-publicity.