Changes in peak expiratory flow rates using two head-tilt/chin-lift maneuver angles in young healthy conscious volunteersopen access
- Authors
- Jo, Sion; Lee, Jae Baek; Jin, Youngho; Jeong, Taeoh; Yoon, Jaechol; Park, Boyoung; Jung, Jin Mu
- Issue Date
- Oct-2019
- Publisher
- PUBLIC LIBRARY SCIENCE
- Citation
- PLOS ONE, v.14, no.10, pp.1 - 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- PLOS ONE
- Volume
- 14
- Number
- 10
- Start Page
- 1
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/147075
- DOI
- 10.1371/journal.pone.0224155
- ISSN
- 1932-6203
- Abstract
- Background
The head-tilt/chin-lift (HT/CL) maneuver is simple and routinely used to open a closed upper airway.
Objectives
It has yet to be determined whether increasing the HT/CL angle further would be beneficial.
Methods
We enrolled 60 (30 males) 20-year-old conscious participants. Pre-HT/CL, post-HT/CL #1, and post-HT/CL #2 positions were defined as positions in which the angle between the ear-eye line and the horizontal line was 80 degrees, 65 degrees, and 50 degrees, respectively. Peak exploratory flow rates (PEFRs) pre-HT/CL, post-HT/CL #1, and post-HT/CL #2 positions were recorded continuously at 1-minute intervals (one set). Five sets of measurements were performed (total, 15 measurements for each participant).
Results
We analysed 900 measurements (180 sets). The mean PEFRs pre-HT/CL, post-HT/CL #1, and post-HT/CL #2 positions were 348.4 +/- 96.9, 366.4 +/- 104.9, and 378.8 +/- 111.2 L/min (percentage change compared to pre-HT/CL, 5.2% and 8.7%), respectively. Significant differences were observed among pre-HT/CL, post-HT/CL #1, and post-HT/CL #2 positions in all participants, as well as in subgroup classified according to sex, and medians of height, body weight, and body mass index.
Conclusion
Our findings suggest that a greater HT/CL angle would be beneficial, as the PEFR increased gradually. The decreasing manner in the PEFR increase with the HT/CL angle implies the existence of an angle threshold beyond which there were no further benefits in airflow, indicating a minimum in airway resistance. A HT/CL maneuver may be appropriate until locking the atlanto-occipital and cervical spine joints in extension occurs and the chest (sternal notch) begins to rise.
- Files in This Item
-
- Appears in
Collections - 서울 의과대학 > 서울 예방의학교실 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/147075)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.