Evidence map›Paper›PMID 29704892›Full record

ArticleFluids and barriers of the CNS2018

Fluid outflow in the rat spinal cord: the role of perivascular and paravascular pathways.

Shinuo Liu, Magdalena A Lam, Alisha Sial, Sarah J Hemley, Lynne E Bilston, Marcus A Stoodley

Open access · goldAbstract read
In one paragraph

Article in Fluids and barriers of the CNS, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.4field-weighted citation impact, top 8% 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

33 citing papers in PubMed, 47 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Blockage of CSF Outflow in Rats after Deep Cervical Lymph Node Ligation Observed Using Gd-based MR Imaging.Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine · 2024
    Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Review
  20. Article
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

6 authors at 2 institutions in 1 country.

Shinuo LiuDepartment of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, Suite 407, Clinic Building, 2 Technology Place, Sydney, NSW, 2109, Australia. shinuo.liu@hdr.mq.edu.au.ORCID http://orcid.org/0000-0003-1563-325X
Magdalena A LamDepartment of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, Suite 407, Clinic Building, 2 Technology Place, Sydney, NSW, 2109, Australia.
Alisha SialDepartment of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, Suite 407, Clinic Building, 2 Technology Place, Sydney, NSW, 2109, Australia.
Sarah J HemleyDepartment of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, Suite 407, Clinic Building, 2 Technology Place, Sydney, NSW, 2109, Australia.
Lynne E BilstonNeuroscience Research Australia, Prince of Wales Clinical School, University of New South Wales, Margarete Ainsworth Building, Barker Street, Randwick, Sydney, NSW, 2031, Australia.
Marcus A StoodleyDepartment of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, Suite 407, Clinic Building, 2 Technology Place, Sydney, NSW, 2109, Australia.
Macquarie University · AUUNSW Sydney · AU

Funding

National Health and Medical Research Council 604008
6 · The paper itself

Abstract

backgroundCerebrospinal fluid (CSF) is thought to flow into the brain via perivascular spaces around arteries, where it mixes with interstitial fluid. The precise details concerning fluid outflow remain controversial. Although fluid dynamics have been studied in the brain, little is known about spinal cord fluid inflow and outflow. Understanding the normal fluid physiology of the spinal cord may give insight into the pathogenesis of spinal cord oedema and CSF disorders such as syringomyelia. We therefore aimed to determine the fluid outflow pathways in the rat spinal cord.

methodsA fluorescent tracer, Alexa-Fluor

resultsFluorescent tracer was distributed over two to three spinal levels adjacent to the injection site. In grey matter injections, tracer spread radially into the white matter. In white matter injections, tracer was confined to and redistributed along the longitudinal axonal fibres. Tracer was conducted towards the pial and ependymal surfaces along vascular structures. There was accumulation of tracer around the adventitia of the intramedullary arteries, veins and capillaries, as well as the extramedullary vessels. A distinct layer of tracer was deposited in the internal basement membrane of the tunica media of arteries. In half the grey matter injections, tracer was detected in the central canal.

conclusionsThese results suggest that in the spinal cord interstitial fluid movement is modulated by tissue diffusivity of grey and white matter. The central canal, and the compartments around or within blood vessels appear to be dominant pathways for fluid drainage in these experiments. There may be regional variations in fluid outflow capacity due to vascular and other anatomical differences between the grey and white matter.

Indexed as

AnimalsCerebrospinal FluidGray MatterMaleRats, Sprague-DawleySpinal CordWhite MatterCerebrospinal fluidInterstitial fluidOutflowPerivascularSpinal cordSyringomyelia

Identifiers

PMID29704892
PMCPMC5924677
OpenAlexW2802151683

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.