Fukuda Denshi DS-8400, Service Manual

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xvi
Precautions about the System
 Do not assess the patient's condition only with the information from this equipment. A clinical judgment based
on the information from the equipment should be made by a doctor who fully understands functions of the
equipment, in a comprehensive manner combined with clinical findings and other test results.
 Do not assess the patient's condition only with the alarm from this equipment. When the alarm is set to OFF or
if the alarm priority is low, a sudden change of the patient may not be noticed.
 If an alarm generates, check the patient's condition first and ensure the safety. Depending on the alarm, take
appropriate measures to remove the problem. If the problem lies with the alarm setting, set the alarm properly.
 When measuring for a long period of time, make sure not to compress the patient with the lead cables and the
electrodes. Compressing the same site for a long duration may inhibit the blood flow and generate compression
necrosis and burn injury.
 Use only the spare parts specified for this equipment. Otherwise, proper function cannot be executed.
 Do not use the touch panel with the film attached. It may cause malfunction or damage the touch panel.
 For quality improvement, specifications are subject to change without prior notice.
 This equipment utilizes LED for the backlight. Since this LED deteriorates by the life cycle, the display may
become dark, scintillate, or may not light by the long term use. In such case, contact Fukuda Denshi.
 This equipment is intended to be used for only one patient.
 The installation of this equipment should be performed by our service representative or a person who is
well acquainted with this equipment.
 If not using the equipment for a long period, disconnect the power cable and lithium-ion battery.
 Although the LCD utilizes highly accurate picture elements, occasionally, there may be a few pixels which do
not light or constantly light. Please note that this is not an equipment failure, and will not affect monitoring
operation.
 Exposing LCD panel to intense light may deteriorate display property. Do not expose the panel to direct
sunlight or strong ultra violet (UV) light.
 The lithium-ion battery can only be charged in the specified operational temperatures of the equipment. Refer
to the operation manual of the lithium-ion battery (BTO-005) for details.
Precautions about the ECG Monitoring
 If any electrodes get detached from the patient after being connected to the lead cable and patient monitor, pay
attention that the metal part of the electrode does not get in touch with any metal parts of the bed or any
conductive parts. Also, the operator should not touch any conductive parts with bare hands. Otherwise, it may
cause electric shock to the patient and/or operator due to excessive leakage current.
 The indication for continuous use of the electrode is about one day.
 Replace the electrode if the skin contact gets loosen due to perspiration, etc.
 When an electrode is attached to the same location for a long period, some patients may develop skin irritation.
Check the patient's skin condition periodically and change the electrode site as required.
 For stable arrhythmia detection and ECG monitoring, verify proper electrode placement, lead, waveform size,
and filter mode selection. If not properly selected, it may cause erroneous detection.
 The threshold level for arrhythmia detection changes with ECG waveform size. Set a proper waveform size for
monitoring.
 When the ECG waveform size is x1/4, x1/2, or x1, the arrhythmia detection level is 250 μ V.
 When the ECG waveform size is x2 or x4, the arrhythmia detection level is 150 μ V.
 The leads for arrhythmia detection, central monitor display, printing are fixed as ECG1 and ECG2. Set the most
appropriate leads with high QRS for ECG1 and ECG2, especially for arrhythmia detection.If the QRS
amplitude for the set lead is low, it may cause erroneous arrhythmia detection.
 In ESIS Mode, artifacts such as electrosurgical noise or EMG can be largely reduced, but QRS amplitude
attenuation, waveform distortion, or ST segment change may occur compared with other filter modes.

The ESIS mode cannot completely reduce the electrical noise, and may erroneously detect the pacemaker
spike. This mode should be selected only when a high frequency noise largely affects the HR measurement.
 There are some cases when the pacemaker pulse cannot be detected depending on the pacemaker type,
pulse voltage, pulse width, electrode lead type (unipolar, bipolar), or electrode placement which causes the
CAUTION
CAUTION