sealing lights, defibrillator, were all subjected to close
monitoring when an electrosurgical device was used.
Due to the nature of the medical act and the need to keep a
sterile environment during actual surgery on patients, the
authors were unable to monitor electromagnetic interference or
electromagnetic field emissions when a surgical act was
performed. Furthermore, it was observed that the generators
emissions did not differ when it was in use in a controlled
laboratory environment.
The results presented in this paper are obtained by
measuring electromagnetic emissions from electrosurgery and
radiosurgery generators (all CE marked and available on the
market) in a laboratory, using a test setup very similar to the
one presented in the 60601-2-2 [5], in order to asses radiated
electromagnetic emissions. The measurements were made
using an Agilent E4404B ESA-E Series Spectrum Analyzer
with a frequency bandwidth of 9 kHz - 6.7 GHz and a
Schwarzbeck - EFS 9218-9218182 Active biconical antenna
with a frequency bandwidth of 9 kHz – 300 MHz, in vertical
polarization. The measurements were made between 10 kHz
and 30 MHz, using a 10 kHz resolution bandwidth, a 30 dB
attenuation at the spectrum analyzer and the reference level
was set at 20 dBm. The Max Hold function of the spectrum
analyzer was used in view of obtaining the maximum values
for the electric field.
All measurements were taken in dBm, the power at the
antenna terminal was recorded, following an offline calculation
of the voltage at the antenna terminal, UE, as described in the
following equation.