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In medicine, a nasopharyngeal airway (NPA), nasal trumpet (because of its flared end), or nose hose, is a type of airway adjunct, a tube that is designed to be inserted through the nasal passage down into the posterior pharynx to secure an open airway. It was introduced by Hans Karl Wendl in 1958. [1]
Nasopharyngeal airway in packaging Nasopharyngeal airways (NPA) are rubber tubes with a flange at one end. When properly used and with the correct size it allows for air to flow between the nose into the lungs. To use choose the appropriate size. Use a water-based lubrication gel to coat the outside of the NPA and the selected nostril.
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A design history file is a compilation of documentation that describes the design history of a finished medical device.The design history file, or DHF, is part of regulation introduced in 1990 when the U.S. Congress passed the Safe Medical Devices Act, which established new standards for medical devices that can cause or contribute to the death, serious illness, or injury of a patient.
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Still, the study confirmed a need for more research into the exact risks and what qualifies as too much sitting, said Dr. Keith Diaz, associate professor of behavioral medicine at Columbia ...