Mindray BeneView T1, Operator'S Manual

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9.4.4 Lateral Chest Expansion
In clinical applications, some patients (especially neonates) expand their chests laterally, causing a negative intrathoracic
pressure. In these cases, it is better to place the two respiration electrodes in the right midaxillary and the left lateral
chest areas at the patient’s maximum point of the breathing movement to optimise the respiratory waveform.
9.5 Choosing the Respiration Lead
In the [ Resp Setup ] menu, set [ Resp Lead ] to [ I ], [ II ] or [ Auto ].
9.6 Changing the Apnea Alarm Delay
The apnea alarm is a high-level alarm used to detect apneas. You can set the apnea alarm delay time after which the
patient monitor alarms if the patient stops breathing. In the [ Resp Setup ] menu, select [ Apnea Delay ] and then select
the appropriate setting. The [ Apnea Delay ] of Resp and CO
2
, module keeps consistent with each other.
9.7 Changing Resp Detection Mode
In the [ Resp Setup ] menu, select [ Detection Mode ] and toggle between [ Auto ] and [ Manual ].

In auto detection mode, the patient monitor adjusts the detection level automatically, depending on the wave
height and the presence of cardiac artifact. Note that in auto detection mode, the detection level (a dotted line) is
not displayed on the waveform.
Use auto detection mode for situations where:

The respiration rate is not close to the heart rate.

Breathing is spontaneous, with or without continuous positive airway pressure (CPAP).

Patients are ventilated, except patients with intermittent mandatory ventilation (IMV).

In manual detection mode, you adjust the dotted detection level line to the desired level by selecting [ Upper Line ]
or [ Lower Line ]. Once set, the detection level will not adapt automatically to different respiration depths. It is
important to remember that if the depth of breathing changes, you may need to change the detection level.
Use manual detection mode for situations where:

The respiration rate and the heart rate are close.

Patients have intermittent mandatory ventilation.

Respiration is weak. Try repositioning the electrodes to improve the signal.
In Auto Detection Mode, if you are monitoring Resp and ECG is switched off, the monitor cannot compare the ECG and
Resp rates to detect cardiac overlay. The respiration detection level is automatically set higher to prevent the detection
of cardiac overlay as respiration.
In Manual Detection Mode, cardiac overlay can in certain situations trigger the respiration counter. This may lead to a
false indication of a high respiration or an undetected apnea condition. If you suspect that cardiac overlay is being
registered as breathing activity, raise the detection level above the zone of cardiac overlay. If the Resp wave is so small
that raising the detection level is not possible, you may need to optimize the electrode placement as described in the
section "Lateral Chest Expansion".