Utah Medical Products FINESSE +, Руководство по обслуживанию

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Service Manual
5
the Technical Specifications section of this manual may not properly signal an error condition and
result in patient injury.
If the patient moves after application of the dispersive electrode, the contact between the elec-
trode and the patient should be rechecked before proceeding with the surgical procedure.
Skin-to-skin contact (e.g. — between the arms and body of the patient) should be avoided, for
example, by the insertion of dry gauze. This practice aids in preventing the establishment of alter-
nate current paths.
Grounding.
At the frequencies and power levels used in electrosurgery, any grounded metal parts
may conduct current away from the patient with sufficient concentration at the contact point to
cause a burn. Although the isolated lead system of this generator is usually effective in limiting
this leakage current and preventing such burns, there are circumstances where this precaution
may be accidentally subverted and stray currents may flow. Therefore, the patient should not
come into contact with metal parts which are grounded or which have an appreciable capacitance
to ground (e.g. operating table, supports, etc.). The use of antistatic sheeting is recommended for
this purpose.
Jewelry. Jewelry can concentrate electrosurgical current if placed in the vicinity of the electro-
surgical procedure or in the general path that the electrosurgical current would follow, for exam-
ple, the path between the surgical site and the dispersive electrode. Also, loose fitting jewelry
may come into contact with objects that could enable an alternate current path. Any of these
conditions could cause patient shock or burn. Jewelry should be removed or isolated by dry gauze
as much as possible.
Leads.
Unshielded active and return leads should be positioned so that they cannot come into
contact with the patient or with other leads connected to the patient. They should also not be
allowed to run closely parallel to other leads.
Monitoring Leads. Electrodes and probes connected to monitoring, stimulating, or imaging
devices (e.g. ECG electrodes) can provide paths for stray electrosurgical currents which may cause
burns. This is possible even though these electrodes and probes are battery operated, insulated, or
isolated at 50Hz/60Hz. The risk can be minimized by placing the electrodes or probes as far away
from the surgical site and dispersive electrode as possible. Protective impedances in the monitor-
ing leads can help reduce the risk of burns. Electrodes covering wide areas are best, and needle-
type monitoring electrodes should never be used during electrosurgery. In all cases, monitoring
systems incorporating high frequency current limiting devices are recommended.
Active Electrode. The surgeon handling the active electrode must, of course, avoid applying the
active electrode to any point on his/her own body. The surgeon must also be aware that if the
active electrode is touched to any conductive tool or appliance, that device becomes an extension
of the active electrode and can cause burns to either the patient or the surgeon. When not being
used, the active electrode should be stored isolated from the patient.
Monopolar Electrosurgery.
The system is a monopolar type electrosurgical system.
For surgical procedures where the HF current could flow through parts of the body having rela-
tively small cross sectional area, the use of bipolar techniques may be desirable in order to avoid
unwanted tissue damage.