[Normative data and clinical practice of sinusoidal harmonic acceleration test].

Abstract

OBJECTIVE:

To establish the normative data of sinusoidal harmonic acceleration test (SHAT) and evaluate the value of clinical application.

METHODS:

One hundred and twenty normal persons, 21 Meniere's disease patients, 2 bilateral vestibular peripheral lesion patients, 15 unilateral vestibular peripheral lesion patients and 10 central lesion patients were tested with SHAT.

RESULTS:

The calibration time was longer in the older persons. The phase decreased with the frequency, and the gain increased with the frequency, but the reliability of the re-test of the phase was better in the lower frequency. The results of the 7 Meniere's disease patients without symptoms were normal, 14 patients post-attack revealed abnormal, 11 had phase abnormal, 3 had gain decrease, 10 revealed asymmetry and spontaneous nystagmus simultaneously, 8 patients had two parameters abnormal. The unilateral vestibular peripheral lesion patients showed 73% (11/15) phase abnormal, 67% (10/15) gain decrease and 40% (6/15) asymmetry, while 5/6 asymmetry patients had spontaneous nystagmus. The gain of the bilateral vestibular peripheral lesion patients showed severe decrease. The abnormal rate in central lesion patients were 70% (7/10) in phase, 20% (2/10) in gain and 40% (4/10) in asymmetry, but the patients with asymmetry had no spontaneous nystagmus.

CONCLUSIONS:

The normal range of the phase, gain and asymmetry of SHAT is in narrow bandwidth. The phase is the most important abnormal sign.

• Authors: Wu-qing Wang, Fang-lu Chi, Li-wen Wu, Hua-zeng Lu
• Journal: Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery (Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi) Vol. 45 Issue 1 Pg. 14-8 (Jan 2010) ISSN: 1673-0860 [Print] China
• PMID: 20398531 (Publication Type: English Abstract, Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Adolescent
• Adult
• Aged
• Aged, 80 and over
• Case-Control Studies
• Child
• Female
• Humans
• Labyrinth Diseases (diagnosis, physiopathology)
• Male
• Meniere Disease (diagnosis, physiopathology)
• Middle Aged
• Reference Values
• Vestibular Function Tests (methods, statistics & numerical data)
• Young Adult