Object. Following shunt placement for treatment of normal-pressure hydrocep
halus (NPH). several patients suffered hearing loss. The authors undertook
a study to analyze this outcome.
Methods. Sixteen patients in whom NPH was diagnosed were treated by placeme
nt of a ventriculoperitoneal shunt. Their hearing was assessed pre- and pos
toperatively by using pure tone audiometry. Two thirds of the ears tested s
howed a postoperative hearing loss of more than 10 dB. Recovery of the hear
ing loss occurred 6 to 12 weeks after shunt placement in 75% of the ears ex
Conclusions. Although shunt insertion for treatment of NPH results in a dec
rease in hearing, most of the loss can be recovered.