CC BY-NC-ND 4.0 · Sleep Sci 2023; 16(03): e310-e316
DOI: 10.1055/s-0043-1772809
Original Article

Nocturnal Polysomnography without Technical Supervision in the Diagnosis of Respiratory Sleep Disorders, Diagnostic Performance of Home and Sleep Laboratory Studies

María Florencia Angellotti
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
Sofía Grandval
2   Instituto Argentino de Investigación Neurológica, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
Vanina Giovini
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
Verónica Jaritos
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
Gastón Diaz-Lapasini
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
Denise Carnevale
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
,
Juan Facundo Nogueira
1   Hospital de Clínicas, Universidad de Buenos Aires, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
2   Instituto Argentino de Investigación Neurológica, Sleep Laboratory, Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina
› Author Affiliations

Abstract

Introduction Unattended Polysomnography (type 2 PSG) is a procedure for the diagnosis of sleep-disordered breathing (SDB). Published evidence on its performance and efficacy is limited. Available studies reveal a high rate of lost records that could limit its application.

Objective To assess the efficacy of type 2 PSG and the rate of studies that must be repeated due to critical loss of signals.

Methods prospective, descriptive study. Adult patients with suspected SDB were included. Unattended PSG was performed using portable equipment. 75 patients were connected at home and another 75 in the laboratory, without subsequent monitoring. Records were evaluated to determine the percentage of the night with adequate quality for each of the signals, considered as an evaluable signal for = 70% of the total recording time (TRT). The need to repeat the studies was also estimated. Results: 150 patients were recruited; 44% women; age 57.3 ± 15.4 years; BMI 29.4 ± 6.5. EEG and EOG signals were adequate in 149 records. Flow signal by pressure cannula was adequate in 146 and by thermistor in 67.8%. In only one study the signal of both effort bands were inadequate. Oximetry was lost in 4 cases. Ten tracings (6%) met the criteria for repetition; 8 hospital and 2 home.

Conclusions Acceptable records were obtained in most unattended PSG studies, both at home and in the sleep laboratory. The rate of repetition of studies due to loss of signal was 6%, with failure in SaO2 or in flow signals being the main cause of the indication.



Publication History

Received: 27 July 2022

Accepted: 13 December 2022

Article published online:
11 September 2023

© 2023. Brazilian Sleep Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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