A programmable ramp waveform generator for PEMF exposure studies on chondrocytes.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2006 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3473

The paper describes the design and testing of a programmable ramp waveform generator intended for PEMF exposure studies. When connected to PEMF coil driver circuitry, it can produce linearly ramping magnetic fields from 0.5 mT to 4.5 mT with pulse widths of 6…

Study snapshot

PublicationConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2006

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Osteoarthritis is a debilitating joint disease where the surface of articular cartilage degrades and is unable to repair itself through natural processes. Controlling the migration of transplanted chondrocytes to the defective cartilage non-invasively could be a novel treatment for osteoarthritis. Our research group has performed an in-vitro investigation into the response of cultured human chondrocytes to pulsed electromagnetic fields (PEMF). Development of a treatment for osteoarthritis patients will require the use of a programmable waveform generator to generate the PEMF. This paper discusses the design and testing of a programmable ramp waveform generator for such purpose. When this ramp waveform generator is connected to the PEMF coil driver circuitry, it will be able to produce linearly ramping magnetic fields ranging in strength from 0.5 mT to 4.5 mT. It also has an attainable pulse width ranging from 6 ms to 100 ms, with a selectable duty cycle from 1% to 99%

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 typeengineering

Effect directionunclear

PopulationCultured human chondrocytes (in vitro)

Sample sizeNot supplied

Exposurepulse width 6–100 ms; duty cycle 1%–99%

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Programmable ramp waveform generator design and testing for PEMF exposure
Ability to generate linearly ramping magnetic fields (0.5–4.5 mT)
Pulse width range (6–100 ms)
Selectable duty cycle (1%–99%)

Limitations

No biological results or health effects outcomes are reported in the abstract
Frequency characteristics of the waveform are not specified
Sample size and experimental details for chondrocyte response are not provided

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "PEMF coil (pulsed electromagnetic fields)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "pulse width 6–100 ms; duty cycle 1%–99%"
  },
  "population": "Cultured human chondrocytes (in vitro)",
  "sample_size": null,
  "outcomes": [
    "Programmable ramp waveform generator design and testing for PEMF exposure",
    "Ability to generate linearly ramping magnetic fields (0.5–4.5 mT)",
    "Pulse width range (6–100 ms)",
    "Selectable duty cycle (1%–99%)"
  ],
  "main_findings": "The paper describes the design and testing of a programmable ramp waveform generator intended for PEMF exposure studies. When connected to PEMF coil driver circuitry, it can produce linearly ramping magnetic fields from 0.5 mT to 4.5 mT with pulse widths of 6–100 ms and duty cycles from 1% to 99%.",
  "effect_direction": "unclear",
  "limitations": [
    "No biological results or health effects outcomes are reported in the abstract",
    "Frequency characteristics of the waveform are not specified",
    "Sample size and experimental details for chondrocyte response are not provided"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "osteoarthritis",
    "articular cartilage",
    "chondrocytes",
    "pulsed electromagnetic fields",
    "PEMF",
    "waveform generator",
    "ramp waveform",
    "magnetic field strength",
    "pulse width",
    "duty cycle",
    "coil driver circuitry"
  ],
  "suggested_hubs": [
    {
      "slug": "engineering-exposure-systems",
      "weight": 0.9,
      "reason": "Focuses on design/testing of a waveform generator for PEMF exposure studies."
    }
  ]
}

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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: 10.1109/iembs.2006.260475
PubMed: 17946168

Read the original paper →

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