Evidence map›Paper›PMID 37784168›Full record

ArticleFluids and barriers of the CNS2023

Transient intracranial pressure elevations (B waves) are associated with sleep apnea.

Casper Schwartz Riedel, Isabel Martinez-Tejada, Morten Andresen, Jens E Wilhjelm, Poul Jennum, Marianne Juhler

Open access · goldAbstract read
In one paragraph

Article in Fluids and barriers of the CNS, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

15 citing papers in PubMed, 14 citations in OpenAlex.

  1. Article
  2. Observational
  3. Article
  4. Article
  5. Article
  6. Neuro-Ophthalmological Disorders Associated with Obstructive Sleep Apnoea.International journal of molecular sciences · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Elevated systemic venous pressures as a possible pathology in prepubertal pediatric idiopathic intracranial hypertension.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2024
    Observational
  13. Article
  14. Review
  15. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Casper Schwartz RiedelDepartment of Neurosurgery, Copenhagen University Hospital, Rigshospitalet, Inge Lehmanns Vej 6, Copenhagen East, 2100, Copenhagen, Denmark. casper.schwartz.riedel@regionh.dk.ORCID http://orcid.org/0000-0002-9393-0092
Isabel Martinez-TejadaDepartment of Neurosurgery, Copenhagen University Hospital, Rigshospitalet, Inge Lehmanns Vej 6, Copenhagen East, 2100, Copenhagen, Denmark.ORCID http://orcid.org/0000-0003-4717-8597
Morten AndresenDepartment of Neurosurgery, Copenhagen University Hospital, Rigshospitalet, Inge Lehmanns Vej 6, Copenhagen East, 2100, Copenhagen, Denmark.ORCID http://orcid.org/0000-0002-3802-6033
Jens E WilhjelmDepartment of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark.ORCID http://orcid.org/0000-0002-9367-8421
Poul Jennum *Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Copenhagen University Hospital, Rigshospitalet, Glostrup, Denmark.ORCID http://orcid.org/0000-0001-6986-5254
Marianne Juhler *Department of Neurosurgery, Copenhagen University Hospital, Rigshospitalet, Inge Lehmanns Vej 6, Copenhagen East, 2100, Copenhagen, Denmark.ORCID http://orcid.org/0000-0003-2652-7495
University of Copenhagen · DKCopenhagen University Hospital · DKTechnical University of Denmark · DK

Funding

Lundbeckfonden R211-2015-2937Novo Nordisk Fonden NNF17OC0024718
6 · The paper itself

Abstract

backgroundRepetitive transient intracranial pressure waveform elevations up to 50 mmHg (ICP B-waves) are often used to define pathological conditions and determine indications for ICP-reducing treatment. We recently showed that nocturnal transient ICP elevations are present in patients without structural brain lesions or hydrocephalus in whom they are associated with sleep apnea. However, whether this signifies a general association between ICP macropatterns and sleep apnea remains unknown.

methodsWe included 34 patients with hydrocephalus, or idiopathic intracranial hypertension (IIH), who were referred to the Neurosurgical Department, Copenhagen, Denmark, from 2017 to 2021. Every patient underwent diagnostic overnight ICP monitoring for clinical indications, with simultaneous polysomnography (PSG) sleep studies. All transient ICP elevations were objectively quantified in all patients. Three patients were monitored with continuous positive airway pressure (CPAP) treatment for an additional night.

resultsAll patients had transient ICP elevations associated with sleep apnea. The mean temporal delay from sleep apnea to transient ICP elevations for all patients was 3.6 s (SEM 0.2 s). Ramp-type transient ICP elevations with a large increase in ICP were associated with rapid eye movement (REM) sleep and sinusoidal-type elevations with non-REM (NREM) sleep. In three patients treated with CPAP, the treatment reduced the number of transient ICP elevations with a mean of 37%. CPAP treatment resulted in insignificant changes in the average ICP in two patients but elevated the average ICP during sleep in one patient by 5.6 mmHg.

conclusionThe findings suggest that sleep apnea causes a significant proportion of transient ICP elevations, such as B-waves, and sleep apnea should be considered in ICP evaluation. Treatment of sleep apnea with CPAP can reduce the occurrence of transient ICP elevations. More research is needed on the impact of slow oscillating mechanisms on transient ICP elevations during high ICP and REM sleep.

Indexed as

HydrocephalusIntracranial HypertensionSleep Apnea SyndromesContinuous Positive Airway PressureHumansIntracranial PressureSleep, REMCPAPHydrocephalusICPObstructive sleep apneaSleep-disordered breathingSlow waves

Identifiers

PMID37784168
PMCPMC10544378
OpenAlexW4387259040

What OpenQuestion holds

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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.