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tube
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    Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.01 sec.

tube

Or electron tube in electronics, a glass tube containing gas at low pressure, which is used to control the flow of electricity in a circuit. The electron tube valve was invented by US radio engineer Lee de Forest (1873–1961). Three or more metal electrodes are inset into the tube. By varying the voltage on one of them, called the grid electrode, the current through the tube can be controlled, and the tube can act as an amplifier.

Tubes have been replaced for most applications by transistors. However, they are still used in high-power transmitters and amplifiers, and in some hi-fi systems.
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Mentioned in?  References in periodicals archive?   Hutchinson browser?   Full browser?
 
Case report A 68-year-old woman presented to the Emergency Department with dysphonia and stridor that rapidly progressed to respiratory distress and necessitated insertion of a nasotracheal tube.
The 'sentinel clot' sign in spontaneous retropharyngeal hematoma ... by Stuckey, Stephen / Ear, Nose and Throat Journal
Thermosoftening treatment of the nasotracheal tube before intubation can reduce epistaxis and nasal damage.
An alternative technique for nasotracheal intubation by Tobias, Joseph D. / Southern Medical Journal
Advancement of the nasotracheal tube was documented as difficult despite the use of ephedrine drops, and bleeding was noted from both nares.
Partial middle turbinectomy by nasotracheal intubation by Herman, Rory C.D. / Ear, Nose and Throat Journal
 
 
 
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