TY - JOUR
T1 - M-mode ultrasound for the detection of pneumothorax during helicopter transport
AU - Lyon, Matthew
AU - Shiver, Stephen A.
AU - Walton, Perry
PY - 2012/10
Y1 - 2012/10
N2 - Background: The presence of the sonographic sliding lung sign (SLS) is a sensitive indicator for the absence of a pneumothorax. The addition of M-mode ultrasound (US) can be a useful adjunct in detecting the SLS. Objective: The objective of this study is to determine the feasibility of using M-mode US in evaluating the SLS during helicopter transport. Methods: A model simulating human lung was used during image acquisition. M-mode images of the SLS were obtained during 3 distinct phases of transport: without rotor rotation, with rotor rotation while on the ground, and at level flight. Four US-credentialed emergency physicians evaluated M-mode US tracings of the model along with examples from human lungs, both with and without pneumothorax, in random fashion. Results: A total of 104 images were reviewed (26 images per reviewer). All of the M-mode images were correctly identified. Motion artifact was noted on the M-mode tracings taken during rotor rotation, which was greatest during level flight. The rotor artifact was not felt to affect the diagnostic utility of the M-mode US tracing. Conclusion: M-mode US may be used successfully to detect the SLS during helicopter transport.
AB - Background: The presence of the sonographic sliding lung sign (SLS) is a sensitive indicator for the absence of a pneumothorax. The addition of M-mode ultrasound (US) can be a useful adjunct in detecting the SLS. Objective: The objective of this study is to determine the feasibility of using M-mode US in evaluating the SLS during helicopter transport. Methods: A model simulating human lung was used during image acquisition. M-mode images of the SLS were obtained during 3 distinct phases of transport: without rotor rotation, with rotor rotation while on the ground, and at level flight. Four US-credentialed emergency physicians evaluated M-mode US tracings of the model along with examples from human lungs, both with and without pneumothorax, in random fashion. Results: A total of 104 images were reviewed (26 images per reviewer). All of the M-mode images were correctly identified. Motion artifact was noted on the M-mode tracings taken during rotor rotation, which was greatest during level flight. The rotor artifact was not felt to affect the diagnostic utility of the M-mode US tracing. Conclusion: M-mode US may be used successfully to detect the SLS during helicopter transport.
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U2 - 10.1016/j.ajem.2011.08.022
DO - 10.1016/j.ajem.2011.08.022
M3 - Article
C2 - 22033387
AN - SCOPUS:84869451092
SN - 0735-6757
VL - 30
SP - 1577
EP - 1580
JO - American Journal of Emergency Medicine
JF - American Journal of Emergency Medicine
IS - 8
ER -