English to Portuguese Medical Medical (general)

Hello everyone, I´m translating an article on dysphagia and the term bulb keeps popping up and I can´t seem to find a satisfactory equivalent. Your help would be appreciated.

3 BULB ARRAY EXAMPLE
One chronic stroke subject was unable to tolerate the
3-bulb array secondary to a hypersensitive gag reflex, and
swallowing pressure data from 2 additional subjects did not
record properly because of equipment malfunction.

AIR-FILLED BULBS EXAMPLE
All subjects performed an 8-week lingual exercise program
consisting of compressing an air-filled bulb between the tongue
and hard palate by using the Iowa Oral Performance Instrument
(IOPI)a