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3800 Vital Signs Monitor Service Manual
Revised October 2004
Precautions
Electrical Safety
If monitor becomes accidentally wet during use, discontinue operation of the monitor until all
affected components have been cleaned and permitted to dry completely. Contact your local
Invivo Research, Inc. representative if additional information is required.
Shock hazard exists if operated without chassis cover. Refer servicing to qualified service
personnel only.
For continued protection against fire hazard, replace fuses with same type and rating only.
Connect the monitor only to a three-wire, grounded, hospital-grade receptacle. The three-
conductor plug must be inserted into a properly wired three-wire receptacle; if a three-wire
receptacle is not available, a qualified electrician must install one in accordance with the
governing electrical code.
Do not under any circumstances remove the grounding conductor from the power plug.
Avoid use of electrical power extension cords. Electrical power extension cords may create a
safety hazard by compromising the grounding integrity of the monitor.
This monitor and its listed accessories may be safely powered by the voltages 110-120/220-240
VAC having a frequency of 50 or 60 Hz.
If the integrity of the earth ground conductor of the AC mains power cable is in doubt, operate the
monitor on internal battery power until proper earth ground connection is confirmed.
Patient Safety
As with all medical equipment, carefully route patient cabling to reduce the possibility of patient
entanglement or strangulation.
ECG
Pacemaker Patients.
Rate meters may continue to count the pacemaker rate during occurrences
of cardiac arrest or some arrhythmias. Do not rely entirely upon rate meter alarms. Keep
pacemaker patients under close surveillance. See the Technical Data chapter for disclosure of the
pacemaker pulse rejection capability of this instrument.
Arrhythmia Patients.
The Escort M8 Vital Signs Monitor is designed to operate in the presence
of cardiac arrhythmias. However, the heart rate meter may be adversely affected in some cases.
An inoperative ECG monitor is indicated by absence of an ECG waveform and a simultaneous
Lead Fail alarm.
For best ECG, Heart Rate, S-T Segment, and/or Respiration monitoring, always select the
optimum lead configuration which has the least artifact and largest waveform(s) being detected
for monitoring use.
NIBP
Always use recommended NIBP cuffs and hoses. Avoid compression or restriction of NIBP cuff
hose.
When using the NIBP portion of this instrument to measure blood pressure, remember that the
patient’s blood pressure readings are not continuous, but are updated each time a blood pressure
measurement is taken. Set a shorter interval for more frequent updating of the patient’s blood
pressure.
Do not attach the cuff to a limb being used for infusion. Cuff inflation can block infusion,
possibly causing harm to the patient.
Frequent NIBP measurements can cause pooling of the blood in the limb (hemostasis), and
peripheral tissue/nerve damage. Allow sufficient time between measurements for blood
recirculation to prevent pooling of the blood in the limb.
