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Purpose: to multidimensionally assess the effect of the Lax Vox® vocal technique on singers with voice complaints. Methods: a comparative intrasubject study that assessed 30 singers - 13 males and 17 females, aged 18 to 55 years - who self-reported voice complaints and had voice problems symptoms. The participants were submitted to voice assessment with perceptive-auditory, acoustic, aerodynamic, and electroglottographic voice analysis, as well as laryngeal assessment with high-speed videolaryngoscopy. The participants were assessed at two moments: 1) at the beginning of the data collection; and 2) five minutes after performing the Lax Vox® vocal technique. The groups were compared with appropriate statistical tests, with a 5% significance level. Results: in the acoustic analysis, there was an increase in the fundamental frequency for males, after using the Lax Vox® vocal technique. In the aerodynamic assessment, there was an increase in the airflow mean values during vocalization, as well as in aerodynamic power after using the Lax Vox® vocal technique in both groups. Conclusion: the Lax Vox® vocal technique, in the studied singers with a complaint of dysphonia, promoted an increase in the fundamental frequency, for males. In the aerodynamic parameters, in both sexes, it promoted an increase in the airflow and aerodynamic power.

COVID-19 is a highly contagious disease caused by the coronavirus SARS-CoV-2. In order to diagnose its infection, a sample is collected by rotating a nasal swab in the nasopharynx. Due to the COVID-19 outbreak, this test was widely used, but its risks were not widely disclosed. This study describes the first case in the literature regarding nasal cerebrospinal fluid (CSF) fistula after a nasal swab test for COVID-19 in a patient without previous nasosinusal disease. This report warns of the risk of a serious complication secondary to the nasal swab test for the diagnosis of COVID-19.

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