Obstructive sleep apnea syndrome and snoring in patients with bilateral vocal cord paralysis.
The analysis of the correlation between bilateral vocal cord paralysis and the occurrence of obstructive sleep apnea syndrome and snoring is presented. The aim of the study was to establish whether the decrease of the air flow in the upper airway in patients with bilateral vocal cord paralysis involves OSAS and/or snoring occurrence and whether arytenoidectomy affects an improvement of breathing parameters measured during sleep. Fourteen patients with bilateral vocal cord paralysis underwent Poly-MESAM examination before and 3 months after arytenoidectomy. They had never complained of snoring before. The Epworth sleepiness scale was used to quantify excessive daytime somnolence. The RDI, DI, mean saturation and percentage of snoring, loud snoring and sleep without snoring were estimated and compared pre- and postoperatively. The results were compared by the Student's t-test for dependent values. No significant differences were shown between the Epworth scores before and after the treatment. The RDI, DI and mean saturation were normal before and after the operation. The percentage of loud snoring decreased and the percentage of sleep without snoring increased significantly after arytenoidectomy in both cases. The mechanism of snoring in patients with vocal cord paralysis seems to be similar to OSAS. The difference consists in the level of flow limitation. On the basis of the results there is no reason to diagnose OSAS and UARS in patients with bilateral vocal cord paralysis. On the other hand, the intensive snoring that occurs after paralysis was significantly reduced as a result of arytenoidectomy.
Misiolek
Maciej
M
Department II Ear, Nose and Throat, Silesian Medical University, Sklodowskiej-Curie 10, 41-800 Zabrze, Poland. misiol@mp.pl
Namyslowski
Grzegorz
G
Karpe
Jacek
J
Ziora
Dariusz
D
Misiolek
Hanna
H
Czecior
Eugeniusz
E
Scierski
Wojciech
W
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007825:Laryngectomy / Q000379:methods; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D020181:Sleep Apnea, Obstructive / Q000209:etiology*; D012913:Snoring / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D014826:Vocal Cord Paralysis / Q000150:complications*