Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/16839
Title: Nasal resistance is elevated in people with tetraplegia and is reduced by topical sympathomimetic administration
Authors: Gainche, Laura
Berlowitz, David J
LeGuen, Mariannick
Ruehland, Warren R
O'Donoghue, Fergal J
Trinder, John
Graco, Marnie
Schembri, Rachel
Eckert, Danny J
Rochford, Peter D
Jordan, Amy S
Date of Publication: 15-Nov-2016
Citation: Journal of Clinical Sleep Medicine 2016; 12(11): 1487-1492
Abstract: STUDY OBJECTIVES: Obstructive sleep apnea (OSA) is common in individuals with tetraplegia and associated with adverse health outcomes. The causes of the high prevalence of OSA in this population are unknown, but it is important to understand as standard treatments are poorly tolerated in tetraplegia. Nasal congestion is common in tetraplegia, possibly because of unopposed parasympathetic activity. Further, nasal obstruction can induce OSA in healthy individuals. We therefore aimed to compare nasal resistance before and after topical administration of a sympathomimetic between 10 individuals with tetraplegia (T) and 9 able-bodied (AB) controls matched for OSA severity, gender, and age. METHODS: Nasal, pharyngeal, and total upper airway resistance were calculated before and every 2 minutes following delivery of ≈0.05 mL of 0.5% atomized phenylephrine to the nostrils and pharyngeal airway. The surface tension of the upper airway lining liquid was also assessed. RESULTS: At baseline, individuals with tetraplegia had elevated nasal resistance (T = 7.0 ± 1.9, AB = 3.0 ± 0.6 cm H2O/L/s), that rapidly fell after phenylephrine (T = 2.3 ± 0.4, p = 0.03 at 2 min) whereas the able-bodied did not change (AB = 2.5 ± 0.5 cm H2O/L/s, p = 0.06 at 2 min). Pharyngeal resistance was non-significantly higher in individuals with tetraplegia than controls at baseline (T = 2.6 ± 0.9, AB = 1.2 ± 0.4 cm H2O/L/s) and was not altered by phenylephrine in either group. The surface tension of the upper airway lining liquid did not differ between groups (T = 64.3 ± 1.0, AB = 62.7 ± 0.6 mN/m). CONCLUSIONS: These data suggest that the unopposed parasympathetic activity in tetraplegia increases nasal resistance, potentially contributing to the high occurrence of OSA in this population.
URI: http://ahro.austin.org.au/austinjspui/handle/1/16839
DOI: 10.5664/jcsm.6272
ORCID: 0000-0003-2543-8722
0000-0001-6048-0147
PubMed URL: https://www.ncbi.nlm.nih.gov/pubmed?term=Nasal+resistance+is+elevated+in+people+with+tetraplegia+and+is+reduced+by+topical+sympathomimetic+administration&TransSchema=title&cmd=detailssearch
Type: Journal Article
Subject: Nasal congestion
Quadriplegia
Sleep apnea
Upper airway physiology
Appears in Collections:Journal articles

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