Gima 35145, User Manual

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7.8 Freezing Waveform
When there are waveforms displayed on screen, press the Freeze key to enter into waveform freezing screen.
During freezing, the frozen symbol “ ” and frozen time will be displayed on the upper right corner of the wave-
form area. At the moment, the operator can do S-T measurement, and get the real-time value of S-T segment.
There are 2 Freeze types: “ECG waves”, “EEG” (if optioned) and “All waves”, which can be set in System Set-
tings window.
7.9 Factors Affecting ECG signal
• Interference from Electro-surgical Unit;
• Doesn’t set the filter mode properly;
• Poor grounding;
• Electrodes are not placed properly;
• Use expired electrode or use disposable electrode repeatedly;
• The skin placed electrode is unclean or poor contract caused by scurf and hair;
Chapter 8
MONITORING RESPIRATION (RESP)
8.1 Introduction
Respiration is monitored by measuring the impedance across the thorax via electrodes places on chest. When
the patient is breathing or ventilated, the volume of air changes in the lungs, resulting in impedance changes
between the electrodes. The device applies safe high-frequency current through ECG electrodes into body
and measures the change of voltage between the electrodes to reflect the thoracic impedance while ECG
monitoring is not affected. Respiration rate (RR) is calculated from these impedance changes, and the respi-
ration waveform is displayed on the monitor screen.
8.2 Safety Information

When monitoring the patient’s respiration, it is recommended to use the so-called “non-OR” ECG cable
which has no built-in resistors to prevent the energy loss of defibrillator discharge. Otherwise the perfor-
mance of respiration monitoring is degraded.

The respiration measurement does not recognize the cause of apneas. It only indicates an alarm if no breath
is detected when a preset time has elapsed since the last detected breath. Therefore, it cannot be used for
diagnostic purpose.

If operating under conditions according to the EMC Standard EN 60601-1-2 (Radiated Immunity 3V/m),
field strengths above 1V/m may cause erroneous measurements at various frequencies. Therefore it is rec-
ommended to avoid the use of electrically radiating equipment in close proximity to the respiration meas-
urement unit.
8.3 Understanding the RESP Display
RESP waveform:
Respiration Panel:
Label and unit of respiration
Respiratory Sync mark
The high and low alarm
limit setting of RR
Apnea alarm mark
Respiration rate