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A model of an oropharyngeal airway (OPA) preventing the tongue from obstructing the airway. An oropharyngeal airway (OPA) is a rigid tube that is inserted into the mouth through the oropharynx and placed above the tongue to move it away from the back of the throat. [2] [4] They are more commonly used than nasopharyngeal airways (NPAs). [4]
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]
An oropharyngeal airway (also known as an oral airway, OPA or Guedel pattern airway) is a medical device called an airway adjunct used in airway management to maintain or open a patient's airway. It does this by preventing the tongue from covering the epiglottis , which could prevent the person from breathing.
There are many methods of subcategorizing this family of devices including route of insertion, absence or presence of a cuff, and anatomic location of the device's distal end. The most commonly used devices are laryngeal masks and supraglottic tubes, such as oropharyngeal (OPA) and nasopharyngeal airways (NPA). [17]
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.
Oropharyngeal airways are one of several different blind insertion airway devices. A blind insertion airway device (BIAD or blind insertion device) is a medical device used for airway management that ensures an open pathway between a patient's lungs and the outside world, as well as reducing the risk of aspiration, which can be placed without visualization of the glottis. [1]
Types of advanced airways include supraglottic devices (devices that lie above the glottis such as OPA, NPA, laryngeal mask airway), infraglottic devices (devices that lie below the glottis and go into the trachea such as endotracheal tube ), and surgery (incision below the glottis such as cricothyrotomy and tracheotomy).
Phthalaldehyde (sometimes also o-phthalaldehyde or ortho-phthalaldehyde, OPA) is the chemical compound with the formula C 6 H 4 (CHO) 2. It is one of three isomers of benzene dicarbaldehyde , related to phthalic acid .