Blood flow in the ears of patients receiving cochlear implants.
We measured cochlear blood flow (CBF) in 55 patients who received cochlear implants, using a laser-Doppler probe placed over the site of drilling in the cochlear bony wall. The subjects included 29 patients with congenital deafness of unknown cause, 8 with idiopathic progressive sensorineural hearing loss, 4 with postmeningitic deafness, 3 with Waardenburg's syndrome, 3 with congenital cytomegalovirus infection, and 8 whose deafness had other causes. There was a wide range of CBF values in patients with congenital deafness of unknown cause. In the patients with idiopathic progressive sensorineural hearing loss, the CBF was significantly lower in patients more than 40 years old. Intracochlear calcification following meningitis appears to be associated with a reduced CBF.
Nakashima
Tsutomu
T
Department of Otorhinolaryngology, Nagoya University School of Medicine, Nagoya, Japan.
Hattori
Taku
T
Sone
Michihiko
M
Sato
Eisuke
E
Tominaga
Mitsuo
M
Sugiura
Makoto
M
D000293:Adolescent; D000328:Adult; D000368:Aged; D002114:Calcinosis / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D003051:Cochlea / Q000098:blood supply* / Q000473:pathology; D003054:Cochlear Implants; D003638:Deafness / Q000151:congenital; D005260:Female; D034381:Hearing Loss / Q000503:physiopathology*; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D007223:Infant; D017078:Laser-Doppler Flowmetry; D008297:Male; D008875:Middle Aged; D012039:Regional Blood Flow