scholarly journals Directional Preponderance (DP) of Caloric Test in Patients with Various Inner Ear Lesions.

1994 ◽  
Vol 53 (2) ◽  
pp. 247-251
Author(s):  
Motohisa Ikeda ◽  
Isamu Watanabe ◽  
Jiro Muto
Keyword(s):  
Inner Ear ◽  
Caloric Test ◽  
Directional Preponderance

Hallpike’s Caloric Test

2016 ◽  
Author(s):  
Robert W. Baloh
Keyword(s):  
Body Temperature ◽  
Inner Ear ◽  
Caloric Test ◽  
Ear Canal ◽  
Caloric Testing ◽  
Minute Period ◽  
Rapid Flow ◽  
Series Of Experiments ◽  
Directional Preponderance

Charles Hallpike decided that greater precision could be obtained with the caloric test by measurement of one or more attributes of the responses to some suitably graded stimulus. He chose to measure the duration of induced nystagmus. Hallpike chose water at 30°C and 44°C (7°C below and above body temperature, respectively) and allowed it to flow for 40 seconds. These temperatures were generally well tolerated, and the comparatively large quantity of water and rapid flow minimized errors due to misdirecting the stream within the ear canal. A simple chart was used to summarize the results of the bithermal caloric test. The chart consisted of two continuous lines, each representing a total of a 3-minute period, subdivided into 10-second intervals. Hallpike conducted a series of experiments on the phenomenon of directional preponderance with caloric testing and emphasized the importance of vestibular tonus originating from the inner ear receptors.

Reference Values for Serial Vestibular Testing

1986 ◽  
Vol 95 (1) ◽  
pp. 83-90 ◽  
Author(s):  
Leonard Proctor ◽  
Robert Glackin ◽  
Craig Smith ◽  
Hiroshi Shimizu ◽  
Paul Lietman
Keyword(s):  
Reference Values ◽  
Test Scores ◽  
Vestibular Function ◽  
Normal Subjects ◽  
Caloric Test ◽  
Initial Value ◽  
Short Acting ◽  
Normal Limits ◽  
Vestibular Testing ◽  
Directional Preponderance

This study defines the normal limits of day-to-day variation in vestibular function. A short-acting caloric test was used and nystagmus intensity was measured by means of an interactive computerized technique. Data were analyzed from 30 normal subjects tested on three successive days and from ten of these subjects who were also tested on 11 additional occasions. Individual caloric test scores generally remained between 55% and 170% of their initial value; narrower ranges resulted when scores were averaged together. There was very little habituation of caloric responses. The upper normal limits of test-retest variation in scores for right-left difference and directional preponderance of caloric responses were 24% and 22%, respectively.

Politzer’s Otology Clinic and the Discovery of the Caloric Test

2016 ◽  
Author(s):  
Robert W. Baloh
Keyword(s):  
Inner Ear ◽  
General Hospital ◽  
Surgical Training ◽  
Nobel Prize ◽  
Caloric Test ◽  
Vestibular Apparatus ◽  
University Of Vienna ◽  
Vienna General Hospital ◽  
Ear Canals ◽  
The University

Robert Bárány began his training in Adam Politzer’s Otology Clinic at the University of Vienna in October 1903 after completing his surgical training at the Vienna General Hospital. During his training, Bárány became friends with Gustav Alexander, who already had been offered a position in Politzer’s clinic. Alexander stimulated Bárány’s interest in the vestibular apparatus of the inner ear and was influential in helping Bárány obtain his appointment in Politzer’s clinic. It was well known in Politzer’s clinic that one had to be extremely careful regarding the temperature of the water used to irrigate the ear canals in removing cerumen, otherwise the patient would become dizzy. Bárány discovered the mechanism of this caloric reaction and eventually received the Nobel Prize in Medicine. Bárány’s findings were considered to be pivotal in clinical otology. His colleagues at the clinic were less magnanimous in their praise of Bárány’s accomplishments and questioned his integrity.

Results in caloric test, video head impulse test and inner ear MRI in patients with Ménière’s disease

2020 ◽  
Vol 47 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Koichi Kitano ◽  
Tadashi Kitahara ◽  
Taeko Ito ◽  
Tomoyuki Shiozaki ◽  
Yoshiro Wada ◽  
...  
Keyword(s):  
Inner Ear ◽  
Meniere’S Disease ◽  
Head Impulse Test ◽  
Caloric Test ◽  
Meniere's Disease ◽  
Ménière’S Disease ◽  
Video Head Impulse Test ◽  
Menière's Disease ◽  
Head Impulse ◽  
Ménière's Disease

Prognosis of patients with idiopathic sudden hearing loss: role of vestibular assessment

2010 ◽  
Vol 125 (3) ◽  
pp. 251-257 ◽  
Author(s):  
S Korres ◽  
G A Stamatiou ◽  
E Gkoritsa ◽  
M Riga ◽  
J Xenelis
Keyword(s):  
Hearing Loss ◽  
Inner Ear ◽  
Sudden Hearing Loss ◽  
Caloric Test ◽  
Test Results ◽  
Vestibular Evoked Myogenic Potential ◽  
Early Recovery ◽  
Profound Hearing Loss ◽  
Myogenic Potential ◽  
Vestibular Assessment

AbstractObjective:To evaluate the correlation between caloric and vestibular evoked myogenic potential test results, initial audiogram data, and early hearing recovery, in patients with idiopathic sudden hearing loss.Materials and methods:One hundred and four patients with unilateral idiopathic sudden hearing loss underwent complete neurotological evaluation. Results for vestibular evoked myogenic potential and caloric testing were compared with patients' initial and final audiograms.Results:Overall, abnormal vestibular evoked myogenic potential responses occurred in 28.8 per cent of patients, whereas abnormal caloric test results occurred in 50 per cent. A statistically significant relationship was found between the type of inner ear lesion and the incidence of profound hearing loss. Moreover, a negative correlation was found between the extent of the inner ear lesion and the likelihood of early recovery.Conclusion:In patients with idiopathic sudden hearing loss, the extent of the inner ear lesion tends to correlate with the severity of cochlear damage. Vestibular assessment may be valuable in predicting the final outcome.

scholarly journals Results in caloric test, vHIT and inner ear MRI in patients with Ménière's disease

2021 ◽  
Vol 124 (6) ◽  
pp. 930-931
Author(s):  
Koich Kitano ◽  
Tadashi Kitahara ◽  
Taeko Ito ◽  
Tomoyuki Shiozaki ◽  
Yoshiro Wada ◽  
...  
Keyword(s):  
Inner Ear ◽  
Meniere’S Disease ◽  
Menière’S Disease ◽  
Caloric Test ◽  
Meniere's Disease ◽  
Ménière’S Disease ◽  
Menière's Disease ◽  
Ménière's Disease

scholarly journals Clinical Characteristics of Patients With Dizziness/Vertigo Accompanied by Posterior Semicircular Canal Hypofunction

2021 ◽  
Vol 8 ◽  
Author(s):  
Zheyuan Li ◽  
Bo Liu ◽  
Hongli Si ◽  
Kangzhi Li ◽  
Bo Shen ◽  
...  
Keyword(s):  
Inner Ear ◽  
Semicircular Canal ◽  
Clinical Characteristics ◽  
Disease Onset ◽  
Vestibular Migraine ◽  
Vestibular Evoked Myogenic Potentials ◽  
Caloric Test ◽  
Horizontal Semicircular Canal ◽  
Inner Ear Disease ◽  
Autoimmune Inner Ear Disease

Objective: To investigate the clinical characteristics of patients with dizziness/vertigo accompanied by loss of the posterior canal(s) (LPC).Methods: Clinical data of 23 patients with LPC were collected. We determined video-head-impulse test (vHIT) gains of all six semicircular canals and correlated vHIT findings with other vestibulo-cochlear tests, including caloric test, ocular and cervical vestibular-evoked myogenic potentials (oVEMP, cVEMP), pure tone audiometry (PTA), and analyzed the differences in clinical manifestations of patients with LPC with different etiologies.Results: LPC was identified in 23 patients. At the time of disease onset, most patients presented with dizziness (47.8%) and vertigo (30.4%) only, and some patients (21.7%) complained of unsteadiness. Among these 23 patients with LPC, there were 14 (60.9%) patients of isolated LPC (ILPC), 21 (91.3%) patients of unilateral LPC (ULPC), and 2 (8.7%) patients of bilateral LPC (BLPC). (1) Among 14 patients with ILPC, 13 (92.9%) patients had unilateral ILPC, the rate of ipsilesional impairment on caloric test, or oVEMP/cVEMP test or PTA ipsilesionally was 53.8% (7/13) in patients with unilateral ILPC. The causes of unilateral ILPC were vertigo/dizziness of unclear origin (38.5%), labyrinthine infarction (15.4%), vestibular migraine (15.4%), and other diseases (30.8%); (2) among 21 patients with ULPC, 7 patients (33.3%) were accompanied with horizontal semicircular canal hypofunction ipsilesionally, the abnormal rate of caloric test, or oVEMP/cVEMP tests or PTA ipsilesionally was 57.1%. The causes of ULPC were vertigo/dizziness of unclear origin (33.3%), autoimmune inner ear disease (14.3%), labyrinthine infarction (14.3%), vestibular neuritis (9.5%), vestibular migraine (9.5%), and other diseases (19.0%); (3) among two patients with BLPC, one patient presented with unsteadiness, the causes of BLPC were vestibular paroxysmia and autoimmune inner ear disease.Conclusion: vHIT is a fast and effective method for assessing LPC, which can be used to detect isolated PC dysfunction. The causes of ILPC were peripheral origin or central origin. Patients with ILPC and ULPC mostly presented with dizziness/vertigo, and ULPC was often accompanied by ipsilateral vestibulo-cochlear impairment.

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