ORIGINAL RESEARCH article
Front. Neurol.
Sec. Neuro-Otology
Volume 16 - 2025 | doi: 10.3389/fneur.2025.1556265
This article is part of the Research TopicNew Methods in Neuro-otology: Vestibular TestingView all 3 articles
Noninvasive brain oxygen saturation measurement during caloric response in vertigo patientspreliminary report
Provisionally accepted
- 1Faculty of Medicine, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland
- 2Polyclinic, Laryngology Outpatient Clinic, Oncology Center prof. F. Łukaszczyk, bydgoszcz, Poland
- 3Faculty of Medical Sciences, Bydgoszcz University of Science and Technology, Bydgoszcz, Pomeranian, Poland
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Introduction -Although videonystagmography (VNG) is a useful test evaluating patients with vestibular symptoms, it may carry undesirable side effects. The aim of this study was to measure cerebral tissue oxygen saturation in patients with vertigo undergoing VNG and assess its relationship with clinical parameters including the severity of the procedure-related side effects.Materials and Methods -The continuous measurement of regional oxygen saturation (rSO 2 ) from both hemispheres during VNG with caloric stimulation was performed in chronic vertigo patients, using a near-infrared spectroscopy sensor connected to a regional oximetry system (O3 TM , Masimo, Irvine, CA) and placed on the subject's forehead. During and after VNG procedure patient-perceived dizziness, discomfort, headache and nausea (side effect) related to VNG testing were assessed, on 0to-10 visual analog scales (VAS).Results -23 patients were enrolled with the mean age of 54.27 years and the average duration of vertigo 5.96 years. 11 patients experienced VNG-related side effects. No significant difference of oximetry parameters was found before and after caloric test, regarding cold or hot water, left or right ear. We found the positive correlation between overall change in oxygenation value during the whole VNG test (delta) in both hemispheres and the severity of side effects symptoms (VAS). The correlation coefficient between delta and VAS on the right was higher than on the left (accordingly 0.69 vs 0.62, p<0.05).The caloric stimulation does not influence regional brain oxygenation measured by regional oximetry system, but the fluctuations of rSO2 values during the whole VNG procedure, predominantly on the right side, may be associated with the side effects of the procedure .
Keywords: Caloric test, brain oximetry, Videonystagmography, Vertigo, oxygenation
Received: 06 Jan 2025; Accepted: 30 May 2025.
Copyright: © 2025 Nowaczewska, Marzec, Kluczyński, Sierakowska and Wróbel. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Magdalena Nowaczewska, Faculty of Medicine, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland
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