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How can a single rescuer adequately deliver tidal volume with a manual resuscitator? An improved device for delivering regular tidal volume.

Authors
 Yong Chul Cho  ;  Sung Wook Cho  ;  Sung Pil Chung  ;  Kweon Yu  ;  O Yu Kwon  ;  Seung Whan Kim 
Citation
 EMERGENCY MEDICINE JOURNAL, Vol.28(1) : 40-43, 2011 
Journal Title
EMERGENCY MEDICINE JOURNAL
ISSN
 1472-0205 
Issue Date
2011
MeSH
Academic Medical Centers ; Cardiopulmonary Resuscitation/instrumentation* ; Cardiopulmonary Resuscitation/methods ; Cohort Studies ; Emergency Medicine/methods ; Emergency Service, Hospital* ; Equipment Design ; Equipment Safety ; Female ; Humans ; Masks ; Respiration, Artificial/instrumentation* ; Respiration, Artificial/methods ; Respiratory Insufficiency/therapy ; Sensitivity and Specificity ; TidalVolume* ; Treatment Outcome
Keywords
Cardiopulmonary resuscitation ; equipment evaluation ; resuscitation ; tidal volume ; ventilation
Abstract
OBJECTIVES: A bag-valve mask (BVM) device is used as one of the first-line pieces of equipment in emergency situations. However, cardiopulmonary support providers do not recognise the exact tidal volume during procedures, and squeezing methods of BVM may not deliver the same tidal volume each time. To supply a regular and sustained tidal volume, adequate finger points were marked on the surface of a BVM.

METHODS: In this study, a total of 83 volunteers participated and practised conventional BVM and volume-marked bag-valve mask (VBVM) procedures. The VBVM is simply a conventional BVM with an imaginary axis grid, drawn to guide the placement of the fingers. The VBVM method provides a constant volume of approximately 500-600 ml; the bag is squeezed until the thumb and the middle finger touch slightly. The results were then statistically analysed.

RESULTS: The tidal volume delivered by the studied VBVM method is more accurate than the conventional BVM method (421.87±95.19 ml vs 534.21±24.22 ml, p<0.001). There was no statistical correlation except age between the results and the participants' training level or physical characteristics in the study.

CONCLUSIONS: As the conventional BVM method cannot deliver a regular and sustained tidal volume, the authors invented the VBVM method. This method delivered a volume of 500-600 ml with more stability each time, which can improve the outcome of emergency patients.
Full Text
http://emj.bmj.com/content/28/1/40.long
DOI
10.1136/emj.2010.099911
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Emergency Medicine (응급의학교실) > 1. Journal Papers
Yonsei Authors
Chung, Sung Phil(정성필) ORCID logo https://orcid.org/0000-0002-3074-011X
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/94177
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