11-2 Infinity Vista VF6
11 RESPIRATION MONITORING
Overview
The monitor measures impedance respiration by passing a high-frequency current
between two ECG electrodes on the patient's chest. Electrical resistance (impedance)
between the electrodes varies with the chest’s expansion and contraction during
inspiration and expiration. The monitor can derive a respiration waveform and rate
from these impedance changes.
You can set the monitor’s breath detection sensitivity to Auto or Manual. If set to
Auto, the monitor automatically adjusts the breath detection sensitivity according to
the average size of the detected breaths. If set to Manual, the detection sensitivity is
based on the waveform amplitude you select (see the section Respiration Monitoring
Display, below).
The monitor is designed to:
z Display the respiration waveform continuously.
z Calculate the average respiration rate per minute.
z Detect apnea in adult, pediatric, and neonatal patients.
Patient Preparation
Selecting and Preparing the Electrodes
Proper selection and preparation of the ECG electrodes is important for effective
respiration monitoring. See the chapter ECG and Heart Rate for information on
preparing and placing electrodes.
Preparing the Patient’s Skin
Follow the recommended instructions given in the chapter ECG and Heart Rate.
NOTE: When using a 3-Lead ECG cable, you must display ECG lead II. If Lead I or
III is displayed instead, the monitor does not calculate a respiration rate and requests that
you select Lead II.
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