tube (redirected from thermionic valve)

tube (toob) a hollow cylindrical organ or instrument.

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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.

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tube (tb)

n.

1. A hollow cylinder, especially one that conveys a fluid or functions as a passage.

2. An anatomical structure or organ having the shape or function of a tube; a duct.

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tube

[t(y)o̅o̅b]

Etymology: L, tubus

a hollow, cylindric piece of equipment or structure of the body.

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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.

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.

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tube

a hollow cylindrical organ or instrument.

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chest tube

one or more tubes inserted into the pleural space to provide relief from either pneumothorax or accumulations of fluid within the thoracic cavity and to allow for re-expansion of the lung.

drainage tube

a tube used in surgery to facilitate escape of fluids. See also drain (2).

endobronchial tube

a double-lumen tube inserted into the bronchus of one lung, permitting complete deflation of the other lung; used in anesthesia and thoracic surgery.

eustachian tube

see pharyngotympanic tube.

feeding tube

one for administering food into the alimentary tract. See also enterostomy tube, jejunostomy tube, tube gastrostomy, nasoesophageal tube (below).

fermentation tube

a U-shaped tube with one end closed, for determining gas production by bacteria. Called also Durham tube.

Levin tube

a gastroduodenal catheter of sufficiently small caliber to permit transnasal passage.

nasoesophageal tube

a feeding tube introduced through the nares and nasal cavity, then into the esophagus. Used in enteral feeding of dogs and cats.

otopharyngeal tube

auditory tube.

pharyngostomy tube

see pharyngostomy intubation.

photomultiplier tube

a vacuum tube that produces an electric current proportional to the intensity of light falling on its photocathode; it is sensitive enough to detect single photons.

tube rating chart

provided by the manufacturer and containing the specifications for the safe operating limits of the x-ray tube in terms of kilovolt peak, milliamps and time.

stomach tube

a flexible tube used for introducing food, medication, or other material directly into the stomach, or for removal of undesirable contents from the stomach. It can be passed into the stomach via the nose or mouth. Passage via the mouth requires the protection of a mouth speculum.

suction drainage tube

see suction drainage.

test tube

a tube of thin glass, closed at one end; used in chemical tests and other laboratory procedures.

thoracostomy tube

one inserted through an opening in the chest wall for application of suction to the pleural cavity to facilitate re-expansion of the lung in spontaneous pneumothorax. See also chest tube (above).

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tube

An elongated cylindrical structure with an opened central bore. See Blue top tube, Chest tube, Corvac tube, CTAD tube, Fallopian tube, Gray top tube, Green top tube, Lavender top tube, Minnesota tube, Myringotomy tube, Non-additive tube, Partial draw tube, Photomultiplier tube, Sengstaken-Blakemore tube, Tiger top tube, Tympanostomy tube, Yellow top tube.

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Patient discussion about thermionic valve.

Q. I have missed 2 periods and had my tubes tied. What could be wrong? I went to the doctor and she didnt even do an exam. She said dont worry until I have missed for 6 months.

A. my wife had her tubes tied a year ago, she gets her period every 3 months,and they are usally pretty short. i wouldnt worry.

Q. can you get pregnant with your tubes tied if your tubes are tied can you get pregnant

A. you can but the chances are slim to none,plus if you do you can sue the doctors, 99% no,

Q. She had an infection in her fallopian tubes. She is recovering now, but can she get pregnant again? My sister had a very bad pregnancy where she had lost her first child. She had an infection in her fallopian tubes. As it was an ectopic pregnancy, she had an operation where they made a small incision in the fallopian tube and removed the embryo. She was depressed for quite a while as she was looking forward to enjoying her new baby. She is recovering now, but can she get pregnant again?

A. i think that was an ectopic pregnancy. of course she can get pregnant again, although the past history of tubal pregnancy increases the risk of developing another ectopic pregnancy in the future. but don't worry, all your sister need to is always consult her health and future-pregnancy condition with her ob-gyn specialist.

i believe that what happened to your sister was non-complicated ectopic pregnancy, because the doctor was just doing the minimal invasive surgery in her fallopian tube. it still has the risks of having another ectopic one in her future pregnancy, but with a complete medical check-up and work-up, i'm sure she will just be doing well.

i just wrote a brief note about ectopic pregnancy, in case you want to read that :
http://doctoradhi.com/blog/2009/01/ectopic-pregnancy/