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Updated: Feb 2, 2026

Measurement of Tissue Oxygenation Using Near-Infrared Spectroscopy in Patients Undergoing Hemodialysis
Published on: October 2, 2020
Tympanogram Findings in Hemodialysis Patients
Ates Mehmet Aksit1, Emel Pektas2, Mahmut Tayyar Kalcioglu3
1Department of Audiology, Near East University, Nicosia, North Cyprus.
Background:
The aim of this study is to investigate whether changes in cerebrospinal fluid (CSF) pressure during the hemodialysis (HD) treatment are reflected on tympanometric measurements.
Methods:
The study was performed on 24 HD patients. The static compliance and absorbance values of the patients before and after HD were measured using a wideband tympanometry. The tympanogram tests were performed immediately before and at the end of the HD session.
Results:
The static compliance values of the patients after HD were significantly lower than those before HD. This decrease significantly correlated with the adequacy of dialysis determined by urea reduction rate and Kt/V. The absorbance values showed a decrease in the band 343 and 727 Hz, but no significant difference was found in other frequencies. The static admittance and absorbance values were influenced by the HD process.
Discussion:
This influence might be due to the increase in CSF pressure as a result of the removal of urea from blood during HD session.
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