Observational studyJornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia
Cervical computed tomography in patients with obstructive sleep apnea: influence of head elevation on the assessment of upper airway volume.
Observational study in Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 18 citations in OpenAlex.
- Methodological parameters for upper airway assessment by cone-beam computed tomography in adults with obstructive sleep apnea: a systematic review of the literature and meta-analysis.Sleep & breathing = Schlaf & Atmung · 2023Pooled it
- Neck circumference in Latin America and the Caribbean: A systematic review and meta-analysis.Wellcome open research · 2021Pooled it
- The impact of semi-upright position on severity of sleep disordered breathing in patients with obstructive sleep apnea: a two-arm, prospective, randomized controlled trial.BMC anesthesiology · 2023Trial
- The influence of head-of-bed elevation in patients with obstructive sleep apnea.Sleep & breathing = Schlaf & Atmung · 2017Trial
- The effect of head of bed elevation on upper airway collapsibility during drug-induced sleep endoscopy.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2024Article
- Effect of back-up head-elevated position during drug-induced sleep endoscopy in obstructive sleep apnea patients.Sleep & breathing = Schlaf & Atmung · 2021Article
- The effect of torso elevation on minimum effective continuous positive airway pressure for treatment of obstructive sleep apnea.Sleep & breathing = Schlaf & Atmung · 2020Article
- A pilot study for segmentation of pharyngeal and sino-nasal airway subregions by automatic contour initialization.International journal of computer assisted radiology and surgery · 2017Article
- Cervical computed tomography in patients with obstructive sleep apnea: influence of head elevation on the assessment of upper airway volume. Cervical computed tomography in patients with obstructive sleep apnea influence of head elevation on the assessment of upper airway volume. Positional changes of oropharyngeal structures due to gravity in the upright and supine positions. AUTHOR'S REPLY.Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e TisilogiaArticle
Corrections and comments
- Commented on by
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveObstructive sleep apnea syndrome (OSAS) has a high prevalence and carries significant cardiovascular risks. It is important to study new therapeutic approaches to this disease. Positional therapy might be beneficial in reducing the apnea-hypopnea index (AHI). Imaging methods have been employed in order to facilitate the evaluation of the airways of OSAS patients and can be used in order to determine the effectiveness of certain treatments. This study was aimed at determining the influence that upper airway volume, as measured by cervical CT, has in patients diagnosed with OSAS.
methodsThis was a quantitative, observational, cross-sectional study. We evaluated 10 patients who had been diagnosed with OSAS by polysomnography and on the basis of the clinical evaluation. All of the patients underwent conventional cervical CT in the supine position. Scans were obtained with the head of the patient in two positions (neutral and at a 44° upward inclination), and the upper airway volume was compared between the two.
resultsThe mean age, BMI, and neck circumference were 48.9 ± 14.4 years, 30.5 ± 3.5 kg/m2, and 40.3 ± 3.4 cm, respectively. The mean AHI was 13.7 ± 10.6 events/h (range, 6.0-41.6 events/h). The OSAS was classified as mild, moderate, and severe in 70%, 20%, and 10% of the patients, respectively. The mean upper airway volume was 7.9 cm3 greater when the head was at a 44° upward inclination than when it was in the neutral position, and that difference (17.5 ± 11.0%) was statistically significant (p = 0.002).
conclusionsElevating the head appears to result in a significant increase in the caliber of the upper airways in OSAS patients.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.