Masakazu Hanamitsu

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OBJECTIVES To confirm that laryngotracheal separation (LTS) is a satisfactory treatment for patients with intractable aspiration pneumonia, even though it does not require tracheoesophageal anastomosis. STUDY DESIGN Retrospective. METHODS Nine patients with intractable aspiration pneumonia underwent LTS at our institution from 1996 to 1999. Two patients(More)
We report a patient with a cavernous haemangioma of the internal auditory canal (IAC). A 47-year-old man presented with a left profound hearing loss and a left facial palsy that had progressed over 5 years. With a preoperative diagnosis of acoustic or facial nerve neurinoma, the tumour was removed totally by a translabyrinthine approach. Intraoperatively,(More)
The main purpose of this study is to search for a viral etiology in Ménière's disease by examining the presence or absence of herpes family virus DNA in the endolymphatic sac (ES) using the in situ hybridization method. This was a prospective study with the ES from 10 patients with Ménière's disease and from 7 control cases without any pre-mortem ear(More)
OBJECTIVES To assess vocal function after near-total laryngectomy (NTL) and to compare that with after vertical hemilaryngectomy (VHL), both of which use the laryngeal mucosa as the vibratory tissue. STUDY DESIGN We retrospectively evaluated 29 patients, 11 of whom underwent NTL and 18 of whom underwent VHL. However, 2 patients failed to speak and 1(More)
UNLABELLED The fundamental frequency of vocal fold oscillation (F(0)) is controlled by laryngeal mechanics and aerodynamic properties. F(0) change per unit change of transglottal pressure (dF/dP) using a shutter valve has been studied and found to have nonlinear, V-shaped relationship with F(0). On the other hand, the vocal tract is also known to affect(More)
CONCLUSIONS Patients with the contralateral type of delayed endolymphatic hydrops (DEH) may undergo an autoimmune attack against the other inner ear. As patients with unilateral juvenile deafness show no progression, despite lengthy observation, the autoantibody against the 68-kDa protein may be unrelated to the pathogenesis of DEH. OBJECTIVE The(More)
OBJECTIVES Neural control of nasal blood flow (NBF) has not been systematically investigated. The aim of the present study was to evaluate the effect of electrical stimulation of both sensory and parasympathetic nerves innervating the nasal mucosal arteries on NBF in rats. METHODS In anesthetized rats, nasociliary (sensory) nerves and postganglionic(More)
INTRODUCTION Connexin26, a gap junction protein that spreads in the inner ear, is thought to be mainly responsible for nonsyndromic hereditary deafness. In the Caucasian population, 30delG is the most frequent mutation. 233delC is the most frequent, however, in the Japanese population. We studied 233delC mutations with restriction enzyme Apa I. SUBJECTS(More)
We evaluated the effectiveness of two navigation systems with optical tracking in endoscopic sinus surgery (ESS). The Signa SP/i Intraoperative navigation system (General Electric Co., Intraoperative NS) is advantageous in acquiring both real time and high-resolution images during surgery, compared to conventional image-guided navigation (Stealth Station(More)
BACKGROUND Laser-assisted inferior turbinoplasty has become accepted as a common treatment for patients displaying allergic rhinitis with severe nasal obstruction. Coblation-assisted inferior turbinoplasty has recently been reported. The aim of this study was to evaluate the effectiveness of coblation-assisted inferior turbinoplasty, compared with laser(More)