Bionet BM5VET, Operation Manual

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BM5Vet Pro User’s Manual
10. Respiration
Overview
The monitor measures impedance respiration by sending a high frequency current between two
ECG electrodes placed on the animal's chest. At inspiration and exhalation, the electrical resistance
(impedance) between the electrodes changes with the contraction and expansion of the chest. You
can get respiratory waveforms and beats from these impedance changes.
The monitor can use ECG leads I or II for respiratory detection regardless of the lead selected for
QRS processing. The measuring range for impedance breath monitoring is 0 to 155 breaths per
minute. The alarm setting range is 5 to 150 breaths per minute.
RESP Precaution
Safety and efficacy of respiration measurement methods for apnea detection, especially apnea of
premature babies and apnea of infants, have not yet been established.
⚫
This device does not monitor obstructive apnea. Animals in a breathing crisis should be
closely monitored.
⚫
Impedance breath monitoring should not be considered the only way to detect a stop in
breathing. Bionet recommends monitoring of additional parameters, such as EtCO
2
and
SpO
2
, that indicates the animal's oxygen supply status.
⚫
If you use an ESU block or cable, the impedance breathing monitor may not function and
the pacemaker detection may be impaired. If pacemaker detection is activated, ESU
interference may be detected as pacemaker extremes.
⚫
Large amplitude pacemaker pulses (greater than 100 mV) can interfere with the monitor's
respiration measurement or detection capabilities
Animal Preparation
Skin preparation and lead placement must be properly and carefully monitored in impedance
breath monitoring. Doing so will produce reliable results. Follow the same recommendations as
for ECG monitoring.
In general, the lead should be placed as clean as possible with the 60Hz noise minimized to make
it possible to generate a signal. To improve the RESP signal, use a 5-lead cable set (RL as a
neutral electrode). It is recommended that the lead be placed in the maximum expansion and
contraction range of the lung, especially if deep breathing is involved.
Avoid the liver and the ventricles of the heart to prevent 60Hz noise from pulsatile blood
circulation.