User Manual Part 5

56 Standalone Monitoring Welch Allyn Propaq LT Vital Signs Monitor
WARNING The monitor does not provide internal arrhythmia analysis; therefore,
arrhythmias can cause the monitor to display inaccurate heart rates.
WARNING Motion artifact can cause the monitor to display inaccurate heart
rates. Minimize patient motion whenever possible.
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 Make sure the patient mode is correct. Incorrect patient mode can
result in inaccurate heart rate readings and inappropriate alarm settings.
WARNING Always use the provided garment clips to route ECG cables away
from the patient’s head.
WARNING Use only accessories listed in the Welch Allyn Products and
Accessories guide (810-0409-XX).
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.