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Electronystagmography versus videonystagmography in diagnosis of vertigo

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Pietkiewicz P., Pepaś R., Sułkowski W. J., Zielińska-Bliźniewska H., Olszewski J.
International Journal of Occupational Medicine and Environmental Health
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2012
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vol. 25
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issue 1
59-65
EN
Objectives: Vertigo is a very common symptom mainly caused by the lesion of vestibular system (peripheral or central) and often accompanied by some work-related diseases and occupational intoxications. The aim of this study was to assess the value of electronystagmography (ENG) and videonystagmography (VNG) for diagnosing vertigo of various origin. Materials and Methods: The study included four groups, 25 subjects each, of patients suffering from vestibular disorders of peripheral, central and mixed origin versus healthy controls. All were examined by means of ENG and VNG, using the bithermal caloric test with 30°C and 44°C air irrigations of the ears. The findings (frequency of induced nystagmus FRQ, its slow phase velocity SPV, canal paresis CP, directional preponderance DP, vestibular excitability VE) were analysed and compared. Results: In all patients with vertigo due to vestibular neuritis, barotrauma and kinetosis, significant CP, the important sign of peripheral site of vestibular lesion was identified both in ENG and VNG. None of the patients with central origin disorders showed CP in VNG; in the majority of cases DP was observed. However, in ENG we found CP in 5 patients with central origin disorders. There were no essential differences between ENG and VNG in measurements of FRQ and SPV except for higher values in VNG in controls and patients with mixed vertigo. Conclusions: The results suggest that the VNG should be recommended in preference as the valuable method to assess vertigo and to discriminate between the peripheral and the central vestibular lesions.
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The use of videonystagmography head impulse test (VHIT) in the diagnostics of semicircular canal injuries in patients with vertigo

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Miłoński J., Pietkiewicz P., Bielińska M., Kuśmierczyk K., Olszewski J.
International Journal of Occupational Medicine and Environmental Health
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2014
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vol. 27
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issue 4
583-590
EN
Objectives: The aim of the study was to assess the function of semicircular canal in videonystagmography head impulse test (VHIT) in the patients with vertigo and balance disorders. Material and Methods: The study was performed in 135 patients (86 women and 49 men) aged 22–79 years, who were divided into 2 groups: I (study group) – 73 patients with vertigo of peripheral, central or mixed origin, II (control group) – 62 patients without vertigo (healthy individuals). The function of canal was determined on the basis of GAIN and expressed as DG/RH×100% (where DG is deviation of gaze and RH is rotation of head). Results: In the study group the semicircular canal injuries were found in 37 (50.69%) patients, including 24 (32.87%) patients with 1 injury and 13 (17.8%) patients with 2 or more injuries in semicircular canal. The injured anterior semicircular canal was reported 13 times; the lateral – 9 times and the posterior – 31 times. Conclusions: In the study group, in the VHIT, injuries in semicircular canals were reported in peripheral vertigo, mixed vertigo with non-compensated and compensated function of the labyrinth in 50.68% cases, whereas in the caloric test dysfunction of the labyrinth was found in 58.49% cases.
3
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Evaluation of vocal acoustic and efficiency analysis parameters in medical students and academic teachers with use of iris and diagnoscope specialist software

86%
Zielińska-Bliźniewska H., Sułkowski W. J., Pietkiewicz P., Miłoński J., Mazurek A., Olszewski J.
International Journal of Occupational Medicine and Environmental Health
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2012
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vol. 25
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issue 3
236-241
EN
Objectives: The aim of this study was to compare the parameters of vocal acoustic and vocal efficiency analyses in medical students and academic teachers with use of the IRIS and DiagnoScope Specialist software and to evaluate their usefulness in prevention and certification of occupational disease. Material and Methods: The study group comprised 40 women, including students and employees of the Military Medical Faculty, Medical University of Łódź. After informed consent had been obtained from the participant women, the primary medical history was taken, videolaryngoscopic and stroboscopic examinations were performed and diagnostic vocal acoustic analysis was carried out with the use of the IRIS and Diagno- Scope Specialist software. Results: Based on the results of the performed measurements, the statistical analysis evidenced the compatibility between two software programs, IRIS and DiagnoScope Specialist, with the only exception of the F4 formant. The mean values of vocal acoustic parameters in medical students and academic teachers, obtained by means of the IRIS software, can be used as standards for the female population not yet developed by the producer. When using the DiagnoScope Specialist software, some mean values were higher and some lower than the standards specified by the producer. Conclusions: The study evidenced the compatibility between two measurement software programs, IRIS and DiagnoScope Specialist, except for the F4 formant. It should be noted that the later has advantage over the former since the standard values of vocal acoustic parameters have been worked out by the producer. Moreover, they only slightly departed from the values obtained in our study and may be useful in diagnostics of occupational voice disorders.
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