tube (toob) a hollow cylindrical organ or instrument.
Nasogastric tube
nasogastric tube,
nasogastric tube [na″zo-gas´trik]
auditory tube eustachian tube; the narrow channel connecting the middle ear and the nasopharynx. 
)
drainage tube a tube used in surgery to facilitate escape of fluids.
Durham's tube a jointed tracheotomy tube.
endobronchial tube a double-lumen tube inserted into the bronchus of one lung to deflate the other lung for anesthesia or thoracic surgery.
endotracheal tube an airway catheter inserted in the trachea in endotracheal intubation.
esophageal tube stomach t.
eustachian tube auditory t.
fallopian tube uterine t.
feeding tube one for introducing high-caloric fluids into the stomach.
Miller-Abbott tube a double-channel intestinal tube with an inflatable balloon at its distal end, for use in treatment of obstruction of the small intestine, and occasionally as a diagnostic aid.
nasogastric tube a soft tube to be inserted through a nostril and into the stomach, for instilling liquids or other substances, or for withdrawing gastric contents.
nasotracheal tube an endotracheal tube that passes through the nose.
neural tube the epithelial tube developed from the neural plate and forming the central nervous system of the embryo.
orotracheal tube an endotracheal tube that passes through the mouth. 
)
Orotracheal tube.
otopharyngeal tube , pharyngotympanic tube auditory t.
Sengstaken-Blakemore tube a multilumen tube used for tamponade of bleeding esophageal varices. 
)
Sengstaken-Blakemore tube for esophagogastric tamponade.
stomach tube a tube for feeding or for stomach irrigation; the most common kind is the nasogastric tube.
test tube a tube of thin glass, closed at one end; used in chemical tests and other laboratory procedures.
tracheal tube endotracheal t.
tracheostomy tube a curved endotracheal tube that is inserted into the trachea through a tracheostomy.
uterine tube fallopian tube; a slender tube extending from the uterus toward the ovary on the same side, for passage of oocytes to the cavity of the uterus and the usual site of fertilization. 
)
Uterine, or fallopian, tube.
Wangensteen tube a small nasogastric tube connected with a special suction apparatus to maintain gastric and duodenal decompression.
x-ray tube a vacuum tube used for the production of x-rays; when a suitable current is applied, high-speed electrons travel from the cathode to the anode, where they are suddenly arrested, giving rise to x-rays. 
)
Standard stationary anode x-ray tube; diagram in longitudinal section.
| nasogastric tube n. A tube that is passed through the nasal passages and into the stomach. |
Nasogastric tube
A tube placed through the nose into the stomach.
Mentioned in: Life Support
nasogastric tube,
any tube passed into the stomach through the nose. See also nasogastric intubation.
nasogastric tube [na″zo-gas´trik]
NG tube; a tube of soft rubber or plastic that is inserted through a nostril and into the stomach for instilling liquid foods or other substances or for gastric decompression. Both medications and nutritive feedings can be given through the tube; see also tube feeding. Prior to insertion of the tube a measurement is made to assure that the distal end of the tube will be positioned in the stomach. This is done by placing the tip of the tube on the bridge of the patient's nose and then marking on the tube the point at which it touches the tip of the xiphoid process. Once the tube is inserted its position should be checked to be sure it is in the stomach and not the trachea or bronchi. This is done by aspirating for stomach contents, using a bulb syringe or 50-ml aspirating syringe. Alternatively, the syringe can be used to inject air into the tube while at the same time listening through a stethoscope for a “whooshing” sound made by the air being injected. The tube should be anchored so that it points downward away from the nares. It is not brought up over the nose and anchored by tape over the bridge of the nose. This increases irritation of the nasal mucosa, impedes circulation, and causes unnecessary discomfort. To avoid tension and drag on the tube a pin and rubber band can be used to secure the tube to the shoulder of the patient's gown or pajama top. mouth care is of particular importance while a nasogastric tube is in place.
Nasogastric tube. From Lammon et al., 1996.
tube,
n a hollow cylindrical structure.
tube, buccal,
n a section of tubing attached to the buccal side of a molar band in a horizontal position, serving as an attachment for the labial arch wire, which slides into the tube.
tube, Coolidge,
n.pr a radiographic tube in which the gas pressure is purposely made so low that it plays no role in the operation of the tube, the operation of which depends on the emission of electrons by the heated filament of the cathode. See also radiographic tube, Coolidge.
tube, discharge,
n a vacuum tube in which a high-voltage electric current is discharged (e.g., a radiographic tube).
tube, endotracheal,
n a plastic tube inserted into the trachea to permit the passage of air to and from the lungs. Tubes are available in varying diameters, depending on the size and age of the patient.
tube, horizontal,
n a metal tube attachment that is placed in a horizontal position on the buccal surface of each anchor molar tooth to allow for the insertion of the labial arch wire.
tube, intubation,
n a tube for insertion into the larynx through the oral cavity.
tube, line focus,
n a radiographic tube in which the target face is about 20 inches (50 cm) from the cathode face. The focal spot is rectangular, with the length approximately three times the width. The acute angle provides an effective focal spot area approximately square and a fraction of the actual area in size.
tube, nasogastric
n a plastic tube inserted through the nose, down the esophagus, and into the stomach. It is used to remove the stomach's contents or to pass food directly to the stomach. Also known as an
NG tube.
NG tube.
tube, protective, housing,
n a radiographic tube enclosure that provides radiation protection.
tube, protective, housing, diagnostic,
n a tube housing that reduces the leakage of radiation to, at most, 0.10 r/hr at a distance of 1 mm from the tube target when the tube is operating at its maximal continuous rated voltage.
tube, protective, housing, therapeutic,
n a tube housing that reduces the leakage of radiation to, at most, 1 r/hr at a distance of 1 m from the tube target when the tube is operating at its maximal continuous rated current for the maximal rated voltage.
tube, right-angle,
n a radiographic tube in which the target is at right angles to the cathode.
tube tooth,
n See tooth, tube.
tube, vertical,
n an attachment that is usually placed on the lingual surface of the anchor band to allow for the insertion of the lingual wire.
tube, radiographic,
n See radiographic tube.
nasogastric
pertaining to the nasal cavity and the stomach.
nasogastric intubation
the flexible tube with a rounded end is passed through the nasal cavity to the stomach; the technique requires expert knowledge and care to avoid damage to the nasal conchae and mucosa and to avoid passing medicines or feed into the lungs. The intubation may be therapeutic to relieve the stomach of a large volume of regurgitated fluid, or to pass a purgative fluid to the intestines, or the passing may be diagnostic in cases of colic to determine if there is fluid being recycled from the intestine back to the stomach. In small animals also used for enteral feeding.
nasogastric tube
a tube of soft rubber or plastic that is inserted through a nostril and into the stomach.
)
Nasogastric feeding tube. By permission from Reed SM, Bayly WM, Sellon DC, Equine Internal Medicine, Saunders, 2003
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