Analysis of Red Blood Cell Movement in Whole Blood Exposed to DC and ELF Electric Fields

Bioelectromagnetics · 2022 · Mixed · Low evidence

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MixedLow evidencePaper 885

Study snapshot

PublicationBioelectromagnetics · 2022

Study typein_vitro

Reported directionMixed

Evidence ratingLow

Abstract

Analysis of Red Blood Cell Movement in Whole Blood Exposed to DC and ELF Electric Fields Miki Kanemaki, Hisae O Shimizu, Hiroshi Inujima, Takeo Miyake, Koichi Shimizu. Analysis of Red Blood Cell Movement in Whole Blood Exposed to DC and ELF Electric Fields. Bioelectromagnetics. 2022 Apr;43(3):149-159. doi: 10.1002/bem.22395. Abstract To evaluate hematological effects of direct current (DC) and alternating current (AC) extremely low frequency (ELF) electric field exposure, this study investigated red blood cell (RBC) movement in whole blood. Video images of RBCs were recorded under a microscope using specially designed electrode systems. Video analysis software was then used to measure the RBC velocity. The noise level and measurement system stability were confirmed based on results of a no-field exposure experiment. Using the electrode system to produce a non- homogeneous electric field, different movements were found to occur in DC and AC field exposure. The RBCs moved in the directions of the electric field and the gradient of field distribution, respectively, in the DC and AC fields. Dependences of the RBC velocity on the field strength were, respectively, linear and quadratic in the DC and AC fields. These results suggest that electrophoretic and dielectrophoretic movements were, respectively, dominant in the DC and AC fields. The magnitude of the electric field necessary to cause these effects was found to be 103 -105 times greater than the internationally publicized guideline for human safety. pubmed.ncbi.nlm.nih.gov

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typein_vitro

Effect directionmixed

PopulationNot supplied

Sample sizeNot supplied

ExposureELF

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

In whole blood under a microscope with a non-homogeneous electric field, RBCs moved in the direction of the electric field during DC exposure and in the direction of the gradient of field distribution during AC (ELF) exposure. RBC velocity depended linearly on field strength for DC and quadratically for AC, suggesting electrophoretic and dielectrophoretic movement dominance, respectively. The electric field magnitude needed to cause these effects was reported as 10^3–10^5 times greater than internationally publicized human safety guidelines.

Outcomes measured

red blood cell (RBC) movement
RBC velocity
electrophoretic movement
dielectrophoretic movement

Limitations

No sample size reported in the abstract.
Exposure parameters (e.g., AC frequency, exact field strengths, exposure duration) are not provided in the abstract.
In vitro microscopy/electrode-system setup may not generalize to in vivo human exposure conditions.

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "red blood cell (RBC) movement",
    "RBC velocity",
    "electrophoretic movement",
    "dielectrophoretic movement"
  ],
  "main_findings": "In whole blood under a microscope with a non-homogeneous electric field, RBCs moved in the direction of the electric field during DC exposure and in the direction of the gradient of field distribution during AC (ELF) exposure. RBC velocity depended linearly on field strength for DC and quadratically for AC, suggesting electrophoretic and dielectrophoretic movement dominance, respectively. The electric field magnitude needed to cause these effects was reported as 10^3–10^5 times greater than internationally publicized human safety guidelines.",
  "effect_direction": "mixed",
  "limitations": [
    "No sample size reported in the abstract.",
    "Exposure parameters (e.g., AC frequency, exact field strengths, exposure duration) are not provided in the abstract.",
    "In vitro microscopy/electrode-system setup may not generalize to in vivo human exposure conditions."
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "red blood cells",
    "whole blood",
    "DC electric field",
    "AC electric field",
    "extremely low frequency",
    "ELF",
    "electrophoresis",
    "dielectrophoresis",
    "RBC velocity",
    "non-homogeneous electric field"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Study concerns DC/ELF electric fields and references human safety guidelines, but no specific occupational context is described."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.22395
PubMed: 35315542

Read the original paper →

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