Evidence map›Paper›PMID 29654317›Full record

ArticleScientific reports2018

On the use of Parylene C polymer as substrate for peripheral nerve electrodes.

Natàlia de la Oliva, Matthias Mueller, Thomas Stieglitz, Xavier Navarro, Jaume Del Valle

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 5% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 77 citations in OpenAlex.

  1. Pooled it
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  15. X-Ray Markers for Thin Film Implants.Advanced healthcare materials · 2022
    Article
  16. Spatio-temporal feature extraction in sensory electroneurographic signals.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2022
    Article
  17. Flexible and Stretchable Bioelectronics.Materials (Basel, Switzerland) · 2022
    Review
  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

5 authors at 2 institutions in 2 countries.

Natàlia de la OlivaInstitute of Neurosciences, Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain.
Matthias MuellerLaboratory for Biomedical Microtechnology, Department of Microsystems Engineering-IMTEK, Albert-Ludwig-University Freiburg, Freiburg, Germany.
Thomas StieglitzLaboratory for Biomedical Microtechnology, Department of Microsystems Engineering-IMTEK, Albert-Ludwig-University Freiburg, Freiburg, Germany.ORCID 0000-0002-7349-4254
Xavier NavarroInstitute of Neurosciences, Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain.ORCID 0000-0001-9849-902X
Jaume Del ValleInstitute of Neurosciences, Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain. jaume.delvalle@uab.cat.
Universitat Autònoma de Barcelona · ESUniversity of Freiburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Parylene C is a highly flexible polymer used in several biomedical implants. Since previous studies have reported valuable biocompatible and manufacturing characteristics for brain and intraneural implants, we tested its suitability as a substrate for peripheral nerve electrodes. We evaluated 1-year-aged in vitro samples, where no chemical differences were observed and only a slight deviation on Young's modulus was found. The foreign body reaction (FBR) to longitudinal Parylene C devices implanted in the rat sciatic nerve for 8 months was characterized. After 2 weeks, a capsule was formed around the device, which continued increasing up to 16 and 32 weeks. Histological analyses revealed two cell types implicated in the FBR: macrophages, in contact with the device, and fibroblasts, localized in the outermost zone after 8 weeks. Molecular analysis of implanted nerves comparing Parylene C and polyimide devices revealed a peak of inflammatory cytokines after 1 day of implant, returning to low levels thereafter. Only an increase of CCL2 and CCL3 was found at chronic time-points for both materials. Although no molecular differences in the FBR to both polymers were found, the thick tissue capsule formed around Parylene C puts some concern on its use as a scaffold for intraneural electrodes.

Indexed as

AnimalsBiocompatible MaterialsCytokinesElastic ModulusElectrodes, ImplantedFemaleForeign-Body ReactionInflammationMacrophagesMicroelectrodesPeripheral NervesPolymersRatsRats, Sprague-DawleySciatic NerveXylenesBiocompatible MaterialsCytokinesparylenePolymersXylenes

Identifiers

PMID29654317
PMCPMC5899141
OpenAlexW2798093954

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.