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Noise Level and Comfort in Healthy Subjects Undergoing High-Flow Helmet Continuous Positive Airway Pressure
- Source :
- Dimensions of critical care nursing : DCCN. 39(4)
- Publication Year :
- 2020
-
Abstract
- Aim: The aim of this study was to assess the noisiness levels produced by different gas source systems, breathing circuits setup, and gas flow rates during continuous positive airway pressure (CPAP) delivered through helmet. Methods: This was a crossover design study. Ten healthy subjects received helmet CPAP at 5 cm H2O in random order with different gas flow rates (60 and 80 L/min), 3 diverse gas source systems (A: Venturi system, B: oxygen and air flowmeters, C: electronic Venturi system), and 3 different breathing circuit configurations. During every step of this study, a heat and moisture exchanger (HME) was placed on the helmet inlet gas port to measure the effects on noise production. Noise intensity level was recorded through a sound-level meter. Participants scored their noisiness perception on a visual analog scale. Results: The noise level inside the helmet ranged between 76 ± 4 and 117 ± 1 Decibel A. The gas source and the gas flow rate always affected the noise level inside and outside the helmet (P < .001). The different "breathing circuit setup" did not change the noise levels inside the helmet (P = .244), but affected the noise level outside, especially when a Venturi system was used (P < .001). An HME filter placed at the junction between the inspiratory limb of the breathing circuit and the helmet significantly decreased the noise intensity inside the helmet (mean dBA without HME, 99.56 ± 13.30 vs 92.26 ± 10.72 with HME; P < .001) and outside (mean dBA without HME, 68.16 ± 12.05 vs 64.97 ± 12.17 with HME; P < .001). The perception of noise inside the helmet was lower when an HME filter was placed on the inspiratory inlet gas port (median, 6 [interquartile range, 4-7] vs 7 [5-8]; P < .001). Conclusions: When helmet CPAP is delivered through gas flow rates up to 50 L/min, an HME placed on the helmet inlet gas port should be used to reduce noise inside the helmet and to improve patients' comfort.
- Subjects :
- noise
Materials science
medicine.medical_treatment
Emergency Nursing
Critical Care Nursing
03 medical and health sciences
0302 clinical medicine
medicine
niv
Humans
Continuous positive airway pressure
Noise level
Decibel
030504 nursing
Continuous Positive Airway Pressure
cpap
Healthy subjects
helmet
030208 emergency & critical care medicine
Respiration, Artificial
Healthy Volunteers
Oxygen
Noise
Heat and moisture exchanger
Venturi effect
Breathing
0305 other medical science
Biomedical engineering
Subjects
Details
- ISSN :
- 15388646
- Volume :
- 39
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Dimensions of critical care nursing : DCCN
- Accession number :
- edsair.doi.dedup.....3faa1daa653b24d72fde58ba02ac5c55