Veterinary monitor user’s manual
Chapter 5-9
5.2 Measurement of RESP
5.2.1 Principles of Measuring
Monitor measures RESP with the method of impedance. When a patient exhales and
inhales, changes will take place in the size and shape of the thoracic cavity, causing
consequent changes in the impedance between the two electrodes installed at the patient’s
chest. Based on the cycle of impedance changes, the respiration rate can be calculated.
5.2.2 Preparatory Steps of the Measurement of RESP
1) Plug the 5-lead ECG cable into the ECG socket of the monitor.
2) Place the various pads of the electrodes onto the body of patient and connect them to
the relevant lead cables. At this moment, the screen will show RESP waves and the RESP
rate will be calculated.
3) Set the parameters relevant to RESP monitoring.
5.2.3 Connect the ECG Cable with Patient and the Monitor
To measure RESP parameters, it is unnecessary to use other cables and it is only
necessary to use the two RA and LL leads in the 5-lead ECG cable. So please refer to Fig.
5-1-1 to plug the 5-lead ECG cable into the CH1 ECG socket and refer to Fig. 5-1-2 to
place the RA and LL leads onto the body of patient.
Warning: For the sake of safety, all the leads on the 5-lead ECG cable must be
connected to the body of patient.
Caution: In order to get the best RESP waveforms, when selecting lead
Ⅱ
for
measuring RESP, it is advised to place RA and LL electrodes cornerways.
Caution: For reducing the influence of rhythmic blood flow on RESP electrode
pickup impedance changes, avoid the liver area and ventricles of heart in the line
between RA and LL electrodes. This is particularly important for small animals.
Caution: The measurement of RESP is not applicable for patient with excessive
motion, otherwise it may cause the mistake of RESP alarm.