Auditory-Verbal Learning Institute, Inc.auditory, tactile, visual, and vestibular.The Eustachian tube is also known as the pharyngotympanic tube or the auditory tube. Choice of formula is based on the patient's particular needs, presence of organ failure or metabolic aberration, lactose tolerance, gastrointestinal function, and how and where the feeding is to be given, that is, via nasogastric, gastrostomy, or enterostomy tube. The Eustachian tube is named after the Italian anatomist, Bartolomeo Eustachi, who observed that it was a canal that connected the nasopharynx to the middle ear. The upper end of the eustachian tube is narrow and surrounded by bone. This conduit permits equalisation of pressure between the middle ear and the throat. Other types of tube feeding formulas are incomplete and therefore will require some supplementation. It is directed downward and inward from the tympanic cavity, or middle ear, to the portion of the pharynx called the nasopharynx (the space above the soft palate and behind and continuous with the nasal passages). The auditory (Eustachian) tube connects the middle ear with the nasopharynx. Some contain all six necessary nutrients (carbohydrates, fats, proteins, vitamins, minerals, and trace elements) and need no supplement as long as they are given in sufficient volume to meet nutritional and caloric needs. There are commercially prepared formulas for tube feeding. Other conditions that may require tube feeding include surgery or trauma to the oropharynx, esophageal fistula, and impaired swallowing such as that which occurs following stroke or that related to neuromuscular paralysis. Patients who may require tube feeding include those unable to take in an adequate supply of nutrients by mouth because of the side effects of chemotherapy or radiation therapy, those with depression or some other psychiatric disorder, and those suffering from severe hypermetabolic states such as burns or sepsis, or malabsorption syndromes. It can be used as the only source of nutrition or as a supplement to oral feeding or parenteral nutrition. Tube feeding a means of providing nutrition via a feeding tube inserted into the gastrointestinal tract it may be done to maintain nutritional status over a period of time or as a treatment for malnutrition. On the lateral wall of the nasal part of the pharynx is the pharyngeal ostium of the auditory tube, somewhat triangular in shape, and bounded behind by a.
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