Inner Ear Valved Shunt (A)
The Inner Ear Valved Shunt helps regulate endolymph
pressure and establishes a conduit for excessive flow
from the endolymphatic system under pressure to the
mastoid cavity. By helping maintain endolymph volume
and pressure at normal physiologic levels, the Inner
Ear Valved Shunt helps facilitate cochlear recovery and
provides the best chance of substantial hearing gains,
in addition to its excellent success rate for complete
elimination or substantial control of vertigo.
Both hearing improvements and vertigo control have
been more frequent for patients when the shunt is
implanted compared to other endolymphatic sac
The shunt is implanted in the endolymphatic duct
which is approached through a mastoidectomy using
microsurgery techniques. Identification and cannulation
can be a routine procedure when specialty inner ear
microsurgery methods and instruments are employed.
The EA–1001 is M.R.I. compatible. Methods have been
developed for inner ear surgery and shunt implantation
that have resulted in very low morbidity with most
patients returning from the hospital in less than 24
Huang Inner Ear Shunt (B)*
The Huang Inner Ear Shunt* is similar in design to the
Inner Ear Valved Shunt. The Huang device does not
include the valve. Procedures for implantation are
similar and the specific instruments are available from
Hood Laboratories. The Huang Inner Ear Shunt consists
of a chamber, an open ended lumen, and a sponge to
protect the lumen from tissue ingrowth.
* T. Huang, M.D.
Chang Gung Memorial Hospital, Tapei, Taiwan R.O.C.