Mindray DS USA Inc. WT0707-00000 Manuel D’Utilisation

Disabled Alarm Tone, 
QRS Tone or Other 
Function

MUTE button pressed. 

Check for alarm mute symbol and 
message.

Beep volume low.

Increase beep volume.

ECG Base Line With No 
Wave form

The Gain control is not set high 
enough. Set through SIZE button. 

Readjust as required. 

Lead wires and patient cable not 
fully inserted into proper 
receptacle.

Check insertion.

Cable or lead wires damaged.

Check with lead continuity tester.

Base Line Wander

Patient moving excessively.

Secure lead wires and cable to 
patient.

Patient's respiration.

Reposition electrodes

Electrodes dry.

Reprep skin and apply fresh moist 
electrodes.

Static build up around patient.

Check with hospital engineer.

Damped Invasive Wave 
form

Air bubbles in tubing.

Eliminate air from tubing.

Kinked catheter. 

Slightly alter position of catheter.

Catheter against wall of blood 
vessel. 

Check for leaks at connector. 

Blood in tubing.

Pump pressure bag up to 300 
mmHg.

No waveform for an 
invasive BP

Improper attachment of 
transducer to monitor. 

Check transducer connection. 

Faulty transducer.

Try a different transducer.

Recorder Report is Blank

Thermal paper may be installed 
incorrectly. (upside down)

Remove paper and reinstall with 
paper feeding off of the spool 
from the bottom.

Resp. Wave form Too 
Large

Scales set inappropriately.

Change lead selection.

Resp. Wave form Too 
Small

Patient breathing shallow or 
turned on side. 
Scale set inappropriately.

Change lead selection

False Apnea Alarm

Apnea delay may be improperly 
set. Patient may be having 
frequent episodes of CVA. 

Choose another apnea delay. 

Scale size may be too low.

Reposition electrodes to better 
detect respirations. 

Due to increased impedance. 
Chest hair under electrodes. 

Prep chest. 

Dried electrode gel. Change 

electrodes.

Electrode off.

Replace electrode.

Lead off.

Replace lead.

Cracked lead wires.

Replace lead wires.

Poor skin prep.

Clean and abrade skin before 
applying electrodes.

Can be caused by shallow 
breathing or an apnea event.

Check the patient
Adjust scales or leads if necessary.