[Intensity of electromagnetic field and electric current on human bodies induced by electric blanket].

Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] · 1998 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 4066

Study snapshot

PublicationZhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] · 1998

Study typeexposure_assessment

Reported directionUnclear

Evidence ratingInsufficient

Abstract

OBJECTIVE: To study the effects of various factors, such as different carriers, with or without ground connection to a blanket and status of its switch, on electromagnetic field induced. METHODS: To determine electric field, magnetic field and electric current on human bodies induced by electric blanket with a temperature--adjustable semiwave rectifier diode, which was domestically popular. RESULTS: Temperature was adjusted and controlled by a diode serially connected to its switch is put on and the blanket, with or without short circuit. When the switch is put on and the blanket is running in low temperature, if the diode is serially connected to the ground end of the power source, the intensities of electromagnetic field and current on the human bodies induced by the blanket was higher than those running in high temperature. CONCLUSION: The most important factor influencing field intensities of the electric blanket is in its switch.

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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 typeexposure_assessment

Effect directionunclear

Populationhuman bodies (not further described)

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 66% · Peer reviewed: yes

Main findings

Electric field, magnetic field, and induced electric current on human bodies were measured for a temperature-adjustable electric blanket under different conditions (e.g., switch status, diode connection, ground connection, short circuit). When the switch was on and the blanket ran at low temperature with the diode serially connected to the ground end of the power source, measured field and current intensities on human bodies were higher than when running at high temperature. The switch was concluded to be the most important factor influencing field intensities.

Outcomes measured

electric field intensity
magnetic field intensity
electric current induced on human bodies

Limitations

No numerical results reported in the abstract
Sample size and participant characteristics not described
Exposure frequency and measurement methods/instruments not specified
Study design details (e.g., setting, distance/positioning) not provided

View raw extracted JSON

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": null,
    "source": "electric blanket",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "human bodies (not further described)",
  "sample_size": null,
  "outcomes": [
    "electric field intensity",
    "magnetic field intensity",
    "electric current induced on human bodies"
  ],
  "main_findings": "Electric field, magnetic field, and induced electric current on human bodies were measured for a temperature-adjustable electric blanket under different conditions (e.g., switch status, diode connection, ground connection, short circuit). When the switch was on and the blanket ran at low temperature with the diode serially connected to the ground end of the power source, measured field and current intensities on human bodies were higher than when running at high temperature. The switch was concluded to be the most important factor influencing field intensities.",
  "effect_direction": "unclear",
  "limitations": [
    "No numerical results reported in the abstract",
    "Sample size and participant characteristics not described",
    "Exposure frequency and measurement methods/instruments not specified",
    "Study design details (e.g., setting, distance/positioning) not provided"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.66,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electric blanket",
    "electromagnetic field",
    "electric field",
    "magnetic field",
    "induced current",
    "ground connection",
    "switch status",
    "diode",
    "temperature setting"
  ],
  "suggested_hubs": [
    {
      "slug": "smart-meters",
      "weight": 0,
      "reason": null
    }
  ]
}

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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: Not supplied
PubMed: 10322796

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