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Stray RF field strength during radiofrequency endometrial ablation
H Moseley1, M M Glegg, M J Evans
1West of Scotland Health Boards, Department of Clinical Physics & Bio-Engineering, Glasgow, UK.
Journal of Medical Engineering & Technology
|May 1, 1996
Summary
Radio-frequency endometrial ablation exposes surgeons to electromagnetic fields exceeding safety levels. However, measured specific absorption rates indicate that staff exposure to radio-frequency radiation during this procedure is not hazardous to health.
Area of Science:
- Medical Physics
- Gynecological Surgery
Background:
- Radio-frequency (RF) endometrial ablation is a common gynecological procedure.
- Concerns exist regarding occupational exposure to electromagnetic fields (EMF) during such procedures.
Purpose of the Study:
- To assess RF field strength and potential health risks for surgeons during endometrial ablation.
- To compare measured exposure levels with established safety guidelines.
Main Methods:
- Measurements of RF field strength were conducted around 17 patients undergoing endometrial ablation across three hospitals.
- Equivalent power density and specific absorption rate (SAR) were calculated and compared to derived investigation and organ dose limits.
Main Results:
- The mean equivalent power density at the surgeon's position exceeded the derived investigation level of 10 W m-2.
- Measured field strengths indicated that the organ dose limit for SAR (10 W kg-1) was not exceeded.
Conclusions:
- While RF field strength can exceed investigation levels, occupational exposure during endometrial ablation is considered safe.
- The procedure does not pose a significant health hazard to surgical staff due to RF radiation exposure.