Dysphonia as post-covid-syndrome ?

Dysphonia Severity Index and Consensus Auditory-Perceptual Evaluation of Voice Outcomes, and Their Relation in Hospitalized Patients with COVID-19

“…Furthermore, we observed that I-low was greater in the patient group (55.55±3.26), and it can be due to increased glottal resistance that necessitates more pressure to initiate vocalization than healthy subjects (49.90±1.90) 35 . Almost similar assessments were reported by the other studies assessing other aerodynamic and acoustic features in COVID-19 patients such as S/Z ratio, MPT, shimmer, HNR, H1H2, CPP 12 , and jitter 10 , 12 , 24 , 54 . Based on the study of Asiaee 12 et al the results of acoustic assessments such as jitter, shimmer, and MPT were significantly different between the COVID-19 and the healthy subjects 12 .…”

“…To be more precise due to SARS-COV-2 infection, unlike the healthy group, in the diseased group I-low and jitter increased, MPT duration and the highest F0 decreased. As we mentioned, jitter was lower in the patients' group (0.56±0.21) compared with the healthy ones (0.19±0.12) and this may be explained based on the hypothesis of inflammation, uneven weighing, incomplete glottis closure, and deterioration of vocal folds' tissue leading to aperiodicity and irregularity in vocal fold vibration after recurrent coughs and virus tissue entry 12 , 54 . MPT duration in the COVID-19 patients (9.90±2.54 Sec) was shorter than healthy group (17.24±3.92 Sec) because of the reduced respiratory support, and also may be due to disturbed glottal closure after possible larynx inflammation, and insufficient coordination between respiratory and phonatory subsystems of speech 12 , 19 , 20 , and maybe because of the hypothesis regarding nerve damage and sensory neuropathy caused by COVID-19 55 .…”

“…Also, the same results were reported by Saki et alin evaluating MPT in two groups of COVID-19 and healthy ones 24 . Moreover, Shahpasand et al mentioned in their poster presentation that there were pathological values for DSI in COVID-19 patients but there wasn't any published data 54 . Contrary to our results in this study, Gölaç et al did not find any difference in the acoustic assessments' results such as HNR, jitter, and shimmer; the logical explanation of these results includes the time of sampling in the Gölaç study 10 .…”