Electromagnetic field system for transsphenoidal surgery on recurrent pituitary lesions - technical note.

Surgical neurology · 2007 · Benefit · Very low evidence

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BenefitVery low evidencePaper 5078

An EMF cautery system generating a 13.56 MHz high-frequency current was used in 18 transsphenoidal reoperations for recurrent pituitary lesions. The authors report it could cut and vaporize scarred tissues without damage to surrounding tissue, and in 3 patien…

Study snapshot

PublicationSurgical neurology · 2007

Study typecase_report

Reported directionBenefit

Evidence ratingVery low

Abstract

BACKGROUND: Post operative scar tissue makes transsphenoidal surgery for recurrent pituitary lesions very difficult. However, with the use of a new cautery system, known as the EMF system, we were able to perform the surgical procedures with relative ease. In this article, we report the advantages and clinical applications of this new instrument in transnasal reoperation. METHODS: The EMF system generates a high frequency current of 13.56 MHz that is focused on the target. This enables it to coagulate, cut, and vaporize tissue in a pinpoint fashion. The bayonet and pencil-type hand pieces of the EMF system are slim, and the tips of the probe are flexible. This enables the surgeon to easily reach deep narrow spaces. We have used the EMF system for transsphenoidal surgery on recurrent pituitary lesions in 18 patients. The system was used to cut and vaporize scar tissue and vaporize firm and fibrotic tumor tissue. RESULTS: During surgery, the system could easily cut and vaporize scarred tissues in the nasal cavity, the sphenoid sinus, and the sella, without damage to the surrounding tissue. In addition, in 3 patients who had extremely fibrotic and firm tumors, we were able to easily vaporize the tumor with safety. CONCLUSIONS: The EMF system enables the surgeon to cut and vaporize tissue with ease and with minimal injury to the surrounding structures. It was particularly valuable in the resection of firm tumors. It may also shorten the operating time because of quick vaporization of the firm tissue.

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 typecase_report

Effect directionbenefit

PopulationPatients undergoing transsphenoidal surgery for recurrent pituitary lesions

Sample size18

ExposureRF · 13.56 MHz

Evidence strengthVery lowConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Intraoperative ability to cut/vaporize scar tissue
Surrounding tissue injury (reported as none)
Ability to vaporize extremely fibrotic/firm tumors
Operating time (suggested may shorten)

Limitations

Publication type listed as case report/technical note; no comparator group described
No quantitative outcome measures reported in abstract (e.g., operating time, complication rates)
Duration/intensity of exposure not described

View raw extracted JSON

{
  "study_type": "case_report",
  "exposure": {
    "band": "RF",
    "source": "medical device (surgical cautery/EMF system)",
    "frequency_mhz": 13.56,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Patients undergoing transsphenoidal surgery for recurrent pituitary lesions",
  "sample_size": 18,
  "outcomes": [
    "Intraoperative ability to cut/vaporize scar tissue",
    "Surrounding tissue injury (reported as none)",
    "Ability to vaporize extremely fibrotic/firm tumors",
    "Operating time (suggested may shorten)"
  ],
  "main_findings": "An EMF cautery system generating a 13.56 MHz high-frequency current was used in 18 transsphenoidal reoperations for recurrent pituitary lesions. The authors report it could cut and vaporize scarred tissues without damage to surrounding tissue, and in 3 patients with extremely fibrotic/firm tumors it enabled tumor vaporization with safety; it may shorten operating time.",
  "effect_direction": "benefit",
  "limitations": [
    "Publication type listed as case report/technical note; no comparator group described",
    "No quantitative outcome measures reported in abstract (e.g., operating time, complication rates)",
    "Duration/intensity of exposure not described"
  ],
  "evidence_strength": "very_low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic field system",
    "EMF system",
    "13.56 MHz",
    "radiofrequency current",
    "transsphenoidal surgery",
    "recurrent pituitary lesions",
    "scar tissue",
    "cautery",
    "vaporization",
    "technical note"
  ],
  "suggested_hubs": [
    {
      "slug": "engineering",
      "weight": 0.6,
      "reason": "Describes a specific RF-based surgical device and its technical/clinical application."
    },
    {
      "slug": "medical-devices",
      "weight": 0.55,
      "reason": "Clinical use of an RF cautery system in neurosurgical procedures."
    }
  ]
}

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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: 10.1016/j.surneu.2006.02.050
PubMed: 17210294

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