Evidence map›Paper›PMID 27797160›Full record

ReviewRespirology (Carlton, Vic.)2017

Pathogenesis of central and complex sleep apnoea.

Jeremy E Orr, Atul Malhotra, Scott A Sands

Open access · bronzeAbstract readReview
In one paragraph

Review in Respirology (Carlton, Vic.), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 2 pooled it
5.1field-weighted citation impact, top 4% of its field
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

73 citing papers in PubMed, 2 syntheses or guidelines pooled it, 136 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Nasopharyngeal tube effects on alleviating sleep hypoxemia during the first night following velopharyngeal surgery in patients with obstructive sleep apnea syndrome.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2023
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  16. Opioids and Respiratory Related Consequences.Sleep medicine clinics · 2025
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13 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 3 institutions in 2 countries.

Jeremy E OrrDivision of Pulmonary and Critical Care Medicine, University of California San Diego, La Jolla, California, USA.
Atul MalhotraDivision of Pulmonary and Critical Care Medicine, University of California San Diego, La Jolla, California, USA.
Scott A SandsDivision of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.
Brigham and Women's Hospital · USUniversity of California, San Diego · USUniversity of California System · US

Funding

Neural Plasticity During Acclimatization to HypoxiaR01HL081823 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI POWELL, FRANK L. · 2005 to 2019
$4.5M
Determination of the site of pharyngeal collapse in Obstructive Sleep Apnea patients from snoring soundsR01HL128658 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI WELLMAN, DAVID ANDREW · 2016 to 2025
$4.3M
Single Motor Unit Genioglossus Recordings to Understand Sleep Apnea PathogenesisR01HL085188 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI MALHOTRA, ATUL · 2008 to 2018
$3.5M
Imaging Blood Flow, Ventilation, and Density InteractionsR01HL119201 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI HOPKINS, SUSAN R · 2016 to 2019
$2.5M
Training in the Next Generation in Respiratory ScienceT32HL134632 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI MALHOTRA, ATUL, POWELL, FRANK L. · 2017 to 2021
$2.1M
Assessment of Upper Airway Mechanics Using Newer Electromyographic TechniquesK24HL132105 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI MALHOTRA, ATUL · 2016 to 2020
$611k
MR Imaging of Upper Airway Dynamics in Obstructive Sleep ApneaR21HL121794 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI DARQUENNE, CHANTAL · 2014 to 2015
$423k
The Contribution of Ventilatory Instability to Sleep Disordered Breathing in Pulmonary HypertensionF32HL131306 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI ORR, JEREMY ELLIOT · 2016 to 2017
$139k
NHLBI NIH HHS F32 HL131306NHLBI NIH HHS K24 HL132105NHLBI NIH HHS L30 HL129451NHLBI NIH HHS R01 HL081823NHLBI NIH HHS R01 HL085188NHLBI NIH HHS R01 HL119201NHLBI NIH HHS R01 HL128658NHLBI NIH HHS R21 HL121794NHLBI NIH HHS T32 HL134632
6 · The paper itself

Abstract

Central sleep apnoea (CSA) - the temporary absence or diminution of ventilatory effort during sleep - is seen in a variety of forms including periodic breathing in infancy and healthy adults at altitude and Cheyne-Stokes respiration in heart failure. In most circumstances, the cyclic absence of effort is paradoxically a consequence of hypersensitive ventilatory chemoreflex responses to oppose changes in airflow, that is elevated loop gain, leading to overshoot/undershoot ventilatory oscillations. Considerable evidence illustrates overlap between CSA and obstructive sleep apnoea (OSA), including elevated loop gain in patients with OSA and the presence of pharyngeal narrowing during central apnoeas. Indeed, treatment of OSA, whether via continuous positive airway pressure (CPAP), tracheostomy or oral appliances, can reveal CSA, an occurrence referred to as complex sleep apnoea. Factors influencing loop gain include increased chemosensitivity (increased controller gain), reduced damping of blood gas levels (increased plant gain) and increased lung to chemoreceptor circulatory delay. Sleep-wake transitions and pharyngeal dilator muscle responses effectively raise the controller gain and therefore also contribute to total loop gain and overall instability. In some circumstances, for example apnoea of infancy and central congenital hypoventilation syndrome, central apnoeas are the consequence of ventilatory depression and defective ventilatory responses, that is low loop gain. The efficacy of available treatments for CSA can be explained in terms of their effects on loop gain, for example CPAP improves lung volume (plant gain), stimulants reduce the alveolar-inspired PCO

Indexed as

Sleep Apnea, CentralSleep Apnea, ObstructiveContinuous Positive Airway PressureHumansTreatment Outcomecentral apnoealoop gainperiodic breathingventilatory instability

Identifiers

PMID27797160
PMCPMC5161664
OpenAlexW2548419715

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

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.