Evidence map›Paper›PMID 34699135›Full record

SynthesisPhysiological reports2021

Effects of acetazolamide on control of breathing in sleep apnea patients: Mechanistic insights using meta-analyses and physiological model simulations.

Christopher N Schmickl, Shane Landry, Jeremy E Orr, Brandon Nokes, Bradley A Edwards, Atul Malhotra, Robert L Owens

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in Physiological reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
3.7field-weighted citation impact, top 6% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 38 citations in OpenAlex.

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  10. Insights, recommendations, and research priorities for central sleep apnea: report from an expert panel.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Christopher N SchmicklDivision of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), La Jolla, California, USA.ORCID 0000-0001-5417-9980
Shane LandryDepartment of Physiology, Sleep and Circadian Medicine Laboratory, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, Victoria, Australia.
Jeremy E OrrDivision of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), La Jolla, California, USA.
Brandon NokesDivision of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), La Jolla, California, USA.ORCID 0000-0003-3515-7545
Bradley A EdwardsDepartment of Physiology, Sleep and Circadian Medicine Laboratory, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, Victoria, Australia.
Atul MalhotraDivision of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), La Jolla, California, USA.
Robert L OwensDivision of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), La Jolla, California, USA.
University of California System · USDiscovery Institute · US

Funding

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
Obstructive Sleep Apnea Endotypes and Impact on Phenotypes of People Living with HIVR01HL142114 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI GRANT, IGOR, OWENS, ROBERT LLEWELLYN · 2018 to 2021
$2.0M
The Impact of Sleep Disordered Breathing in People who use OpioidsK23HL151880 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI ORR, JEREMY ELLIOT · 2021 to 2025
$849k
NHLBI NIH HHS K23 HL151880NHLBI NIH HHS R01 HL142114NHLBI NIH HHS T32 HL134632
6 · The paper itself

Abstract

Obstructive and central sleep apnea affects ~1 billion people globally and may lead to serious cardiovascular and neurocognitive consequences, but treatment options are limited. High loop gain (ventilatory instability) is a major pathophysiological mechanism underlying both types of sleep apnea and can be lowered pharmacologically with acetazolamide, thereby improving sleep apnea severity. However, individual responses vary and are strongly correlated with the loop gain reduction achieved by acetazolamide. To aid with patient selection for long-term trials and clinical care, our goal was to understand better the factors that determine the change in loop gain following acetazolamide in human subjects with sleep apnea. Thus, we (i) performed several meta-analyses to clarify how acetazolamide affects ventilatory control and loop gain (including its primary components controller/plant gain), and based on these results, we (ii) performed physiological model simulations to assess how different baseline conditions affect the change in loop gain. Our results suggest that (i) acetazolamide primarily causes a left shift of the chemosensitivity line thus lowering plant gain without substantially affecting controller gain; and (ii) higher controller gain, higher paCO

Indexed as

Computer SimulationModels, BiologicalAcetazolamideCarbonic Anhydrase InhibitorsHumansRespirationSleep Apnea SyndromesAcetazolamideCarbonic Anhydrase Inhibitorsacetazolamiderespirationsleep apnea syndromes

Identifiers

PMID34699135
PMCPMC8547551
OpenAlexW3208442966

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.