Welch Allyn 901061 Propaq LT Vital Signs Monitor - User Manual - Manual (Page 57)

Directions for Use Standalone monitoring 53
WARNING (1) During a surgical procedure, do not use small ECG electrodes.
(2) Select ECG electrode attachment points remote from the surgical site and
remote from the electrosurgical return electrode. (3) Use electrosurgical return
electrodes with the largest practical contact area. (4) Assure proper application of
the electrosurgical return electrode to the patient.
High-intensity radio-frequency (RF) energy from external sources, such as an
improperly connected electrosurgical unit, can induce heat into electrodes
and cables, which can cause burns on the patient and can lead to
measurement errors.
WARNING Always use the provided garment clips to route ECG cables away
from the patient’s head.
WARNING Use only accessories approved by Welch Allyn. The use of any other
accessories can result in inaccurate patient data, can damage the equipment, and
can void your product warranty. Refer to the accessory list or
www.welchallyn.com .
WARNING Always use accessories according to the standards of your facility
and according to the manufacturer's directions.
WARNING Never use ECG cables with loose or faulty detachable lead wires.
These can cause erratic behavior of the ECG and respiration waveforms due to
intermittent ECG lead wire connections.
WARNING Resp is derived from the same leads as the ECG channel, so the
monitor determines which signals are cardiovascular artifact and which signals are
a result of respiratory effort. If the breath rate is within five per cent of the heart
rate or is a multiple or submultiple of the heart rate, the monitor might ignore
breaths and trigger a respiration alarm.
Caution Never use an ECG cable longer than 10 feet (3 meters) including
extensions. If you use an ECG extension cable with an ECG cable longer than
4 feet, the monitor acts as though no ECG cable is connected.
Caution To protect the monitor from damage during defibrillation or
electrosurgery, for accurate ECG information, and for protection against noise
and other interference, use only ECG electrodes and cables specified or supplied
by Welch Allyn (these cables have the required current-limiting resistors). Follow
recommended application procedures.
Note The monitor contains type CF fully isolated patient-connected circuitry, but it is
not intended for direct application on a patient’s heart.
Severe artifact and interference (such as defibrillation interference) can cause the
waveform to move off of the display for a few seconds before it is restored.
Impedance pneumography (Resp) is not recommended for use with
high-frequency ventilation.
The monitor counts as breaths any respiratory efforts larger than twice the
background cardiovascular artifact.
Note Use only silver/silver chloride electrodes. Other electrodes, such as stainless
steel electrodes, squeeze-bulb electrodes, or electrodes with dissimilar metals,
are subject to large offset potentials due to polarization. Other electrodes can also
have slower recovery time after the application of defibrillator pulses.