User's Manual

Radical-7 Appendix: Best Practices for Comparisons to Reference Measurements
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Best Practices Checklist for Acoustic Respiration Rate
Comparisons
Acoustic Sensor placement
 The Acoustic sensor has a small black arrow on the front (see figure below), when placing
the sensor the black arrow should point forward to the anterior of subject’s body.
 Ensure placement site is hair-free, clean of debris, and dry prior to sensor placement. Use
an alcohol swab to clean the neck area, if needed.
 The preferred sensor placement site is either in quadrant 3 or 4 (center of sensor), see
figure below to either side of the larynx, avoid center of the neck. The most critical item is to
place the sensor at the site where it can receive the strongest breathing signal. To locate
this, place two fingers on the neck while the subject makes a continuous Ahhh sound and
choose the location that has the most vibration.
 For pediatric subjects that have limited neck space, the sensor may be placed on the
right side of chest, underneath clavicle. The sensor should not be touching the clavicle.
 Place sensor tape on skin. Gently press on sensor tape from center outward so adhesive
forms a good contact with patient's skin. Ensure there are no skin folds or air gaps under
sensor pad.
 Remove the release liner from the anchor pad and place the anchor pad on patient’s side
of the neck; route the sensor cable in front of patient. Do not place anchor pad on clothing.