Evaluation of a novel simulation method of teaching B-lines: hand ultrasound with a wet foam dressing material

Kyoo-Hyun Lee, Jung-Hwan Ahn, Ru Bi Jung, Chong Kun Hong, Tae Yong Shin, Young Sik Kim, Young Rock Ha, Kyoo-Hyun Lee, Jung-Hwan Ahn, Ru Bi Jung, Chong Kun Hong, Tae Yong Shin, Young Sik Kim, Young Rock Ha

Abstract

Objective: The aim of this study was to evaluate the effectiveness of teaching A- and B-lines, and lung sliding with a novel simulation methods using hand ultrasound.

Methods: All subjects enrolled were medical school students who were novices in lung ultrasound. All subjects attended a 20-minute lecture about lung ultrasound using simulated video clips of A-lines, B-lines, and lung sliding; and then a 20-minute post-test was administered. The post-test included questions on the presence or absence of A-lines, B-lines, and lung sliding using a random mixture of 20 real video clips and 20 simulated video clips created by using hand ultrasound with or without foam dressing materials. A Wilcoxon signed rank test was used to compare the scores of A-lines, B-lines, and lung sliding between the real images (RG) and simulated models (SG).

Results: There was a statistically significant difference in the median score of the correct answers for A-lines (RG, 18; SG, 17; P=0.037). Correct answers for B-line were significantly different between RG and SG group (RG, 18; SG, 17; P=0.008). There was a statistically significant difference in the median score of the correct answers for lung sliding (RG, 16; SG, 18; P<0.001).

Conclusion: We found this novel B-line teaching model by using a hand ultrasound with a wet foam dressing material is effective for beginners who are less experienced with lung ultrasound and pulmonary interstitial syndrome.

Keywords: Education; Pulmonary edema; Ultrasonography.

Conflict of interest statement

No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1.
Fig. 1.
Microscopic structure of Medifoam. (A) In the dried-up state, it resembles normal microscopic pulmonary architecture. (B) After soaking with normal saline, it resembles microscopic pulmonary edema architecture. Images taken with a Digital Microscope (KH-770, Hirox, Tokyo, Japan).
Fig. 2.
Fig. 2.
Hand ultrasound with foam dressing material. (A) Medifoam attached dorsum of hand. (B) Probe positioned on the palm of the hand, perpendicular to the metacarpal bones.

References

    1. Volpicelli G, Elbarbary M, Blaivas M, et al. International evidence-based recommendations for point-of-care lung ultrasound. Intensive Care Med. 2012;38:577–91.
    1. Shokoohi H, Boniface K. Hand ultrasound: a high-fidelity simulation of lung sliding. Acad Emerg Med. 2012;19:E1079–83.
    1. Lewiss RE, Tayal VS, Hoffmann B, et al. The core content of clinical ultrasonography fellowship training. Acad Emerg Med. 2014;21:456–61.
    1. Soldati G, Copetti R, Sher S. Sonographic interstitial syndrome: the sound of lung water. J Ultrasound Med. 2009;28:163–74.
    1. Soldati G, Giunta V, Sher S, Melosi F, Dini C. “Synthetic” comets: a new look at lung sonography. Ultrasound Med Biol. 2011;37:1762–70.
    1. Lichtenstein DA, Meziere GA, Lagoueyte JF, Biderman P, Goldstein I, Gepner A. A-lines and B-lines: lung ultrasound as a bedside tool for predicting pulmonary artery occlusion pressure in the critically ill. Chest. 2009;136:1014–20.
    1. Lichtenstein D, Meziere G, Biderman P, Gepner A, Barre O. The comet-tail artifact: an ultrasound sign of alveolar-interstitial syndrome. Am J Respir Crit Care Med. 1997;156:1640–6.

Source: PubMed

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