(если, конечно, этот вопрос - из той же группы, что и "pilot balloon" и "pilot line"...)

"Throughout emergence, endotracheal tube cuff pressure was continuously recorded using a pressure transducer connected to the **valve of the pilot balloon**. Cuff pressure was initially adjusted to 30 mm Hg, and the cuff pressure was then continuously recorded on a strip chart recorder..."
http://www.anesthesia-analgesia.org/cgi/reprint/87/5/1170



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Note added at 1 дн7 час (2008-05-27 15:29:37 GMT)
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"The goal of the new product is to modify the existing **tube-cuff-valve system** to allow regulation of the **pressure in the cuff**..."
http://homepages.cae.wisc.edu/~bme402/cuff_valve_s06/reports...

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Note added at 1 дн7 час (2008-05-27 15:33:12 GMT)
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"The new added valve will be used as a safety valve, **releasing excess pressure when pressure inside valve (directly correlating with cuff pressure) exceeds 25 centimeters H2O**. The release valve will be a one-way outtake valve that is held shut by a spring, much like the current intake valve found on the endotracheal tube made to inflate only by means of inserting the syringe..."
(Там же)

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Note added at 1 дн8 час (2008-05-27 15:39:45 GMT)
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"This design involves the attachment of a second pilot tube and **pilot balloon** to the existing pilot balloon (Figure 4). Because the pressure inside the cuff is equal to the pressure inside the pilot balloon, the new one-way **release valve will respond to the pressure in the original balloon** and new tube. Once the pressure exceeds 25 centimeters water pressure, the pressure release valve will open to rid the cuff of extra pressure and the release valve will close again when the pressure is about 25 centimeters water pressure..."
(Там же)