27/04/04 ©
Söring
Users manual RF-units
1
not valid for MBC600
-18-
Aktivelektrode
Active electrode
Neutralelektrode
Patient electrode
N-HF
N-RF
Strombegrenzungswiderstände
current-limiting Resistors
Aktivelektrode
Active electrode
N-EKG
N-ECG
EKG-unit
ECG unit
Fig 4.6 EKG cables with current limiting resistors
-
Needle electrodes are not recommended for EKG monitoring. Because of their small
surface area the risk of burns is increased. Monitoring electrodes with areas as large as
possible should be used instead.
-
For simultaneous operation of EKG and RF surgery equipment power outlets (230V~)
close to each other and connected to the same or adjacent power circuits should be
used in order to avoid dangerous current loops which may originate from outlets
situated far apart from each other.
4.4. Current carrying cables
(RF surgery equipment, monitoring electrodes etc.)
In RF surgery attention should be paid that electrode cables (active electrode, patient
electrode)
-are as short as possible
-are laid out without loops (see Fig. 4.7).
-are laid out so that they do not touch the patient or other cables (risk of capacitive current
coupling)
-are not conducted parallel to EKG cables (risk of capacitive current coupling) and
-do not present obstacles or stumbling risks to the OR staff.
A c tiv e e le c tro d e
P a tie n t e le c tro d e
A c tiv e e le c tro d e
P a tie n t e le c tro d
Fig. 4.7 Positions of cables and patient electrode in RF surgery
