Previous studies have reported that the noise generated by dental equipment can interfere with the auscultation of respiratory sounds during sedation. Therefore, this study aimed to identify whether positing the acoustic sensor on the chest or cervical position would be least susceptible to interference from dental suction device noise, a prominent noise noted during respiratory sound monitoring during dental sedation. This prospective cohort study was conducted with 30 students. Sound intensity (dB) and frequency (kHz) levels from the dental suction were recorded from the cervical and chest regions under both oral and nasal breathing conditions and analyzed. The mean intensity of dental suction sounds was significantly lower in the chest region compared with the cervical region, regardless of the breathing condition (P < .001). Furthermore, in the chest region, the mean sound frequency during oral breathing was significantly lower than that during nasal breathing (P < .01). Our study suggests that monitoring respiratory sounds in the chest region can significantly reduce interference from noise generated by dental suction devices compared with monitoring at the cervical region.Objective
Methods
Results
Conclusions
Study Protocol
The protocol used in the volunteer study to record the sounds during 30 seconds of nasal or oral breathing patterns.
The Acoustic Respiratory Sound Monitoring System
(A) Sensor attachment locations. (N, cervical sensor location; S, chest sensor location). (B) Photograph of the entire system. (C) Sensor. (D) Adhesive gel (equipped with a soundproofing cover to reduce friction noise).
Spectrogram of Sound Recording
This spectrogram illustrates the recorded sounds auscultated from the chest region during oral breathing. The right color bar indicates sound intensity (dB).
Contributor Notes