The Effect of Change in Posture on Spirometry in Patients with Obstructive Sleep Apnoea Syndrome
Journal Title: Sultan Qaboos University Medical Journal - Year 2019, Vol 19, Issue 4
Abstract
Objectives: Obstructive sleep apnoea syndrome (OSAS) is a growing health concern as it is associated with serious comorbidities. OSAS is mainly related to obesity, age, gender and a narrowed upper airway is commonly seen in patients with OSAS. This study aimed to compare spirometry parameters between obese OSAS patients and non-obese OSAS patients when patients moved from sitting to supine. Methods: This cross-sectional study was conducted at Sultan Qaboos University Hospital, Muscat, Oman, between December 2009 and December 2010. Patients with severe OSAS and who were OSAS treatment naïve were recruited. Spirometry was performed in all patients in sitting and supine positions to assess forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), FEV1/FVC, forced expiratory flow (FEF) 50%, FEF 25–75%, maximum forced inspiratory flow and expiratory reserve volume. The mean difference in spirometry parameters between patients in sitting and supine positions was calculated. Results: A total of 27 OSAS patients (19 males and 8 females) were included in this study. There was a significant difference in FEV1/FVC in obese and non-obese patients when changing position (P = 0.03). In addition, there was a significant change between male and female patients’ FVC percentages (P <0.05). Male patients with OSAS had reduced FVC compared to females. There was no significant difference in the remaining spirometry parameters with patients’ change of position. Conclusion: A supine position may cause lower airway obstruction in obese patients with OSAS. The reduced FVC in males possibly contributes to the high prevalence of OSAS in men compared to women.
Authors and Affiliations
Redha Al Lawati, Mohammed A. Al Abri, Balaji Kuppuswamy, Amira Al-Kharousi, Al Yaqdhan Al-Atbi, Syed Rizvi, Mohan Dikshit
Keywords
Related Articles
- EP ID EP675780
- DOI http://dx.doi.org/10.18295/squmj.2019.19.04.006
- Views 274
- Downloads 0
Bilateral Absence of the Arcuate Artery on the Dorsum of the Foot With anomalous origin of dorsal metatarsal arteries
Bilateral absence of the arcuate artery was observed during routine dissection of the lower limbs of a 60-year-old male cadaver. Running distally on the dorsal aspect of both feet and opposite the tarso-metatarsal joint...
Vascular Anomalies in Children Misdiagnosed with Asthma Case series
In most asthmatic children, inhaled steroids can relieve and control the symptoms of asthma. Persistent wheezing and respiratory symptoms in young children despite appropriate treatment may indicate other diagnostic co...
Adrenal Oncocytic Neoplasm with Uncertain Malignant Potential
Adrenal oncocytic neoplasms (AONs) are a rare group of tumours with a somewhat uncertain natural history and clinical behaviour. Out of 46 cases of AON reported to date, 6 cases were histologically classifed as neoplas...
Medical Education is on the Move once more
Use of Intravenous Sulprostone for the Termination of Pregnancy with Fetal Death in Second and Early Tird Trimester of Pregnancy
To study the efficacy of intravenous sulprostone (Nalador) for the termination of pregnancy with fetal death in second and early third trimester of pregnancy. Methods: Tis is a retrospective collection and analysis of d...