Volume 19 Supplement 1

35th International Symposium on Intensive Care and Emergency Medicine

Open Access

Lung ultrasound aeration assessment: comparison of two techniques

  • S Mongodi1,
  • F Mojoli1,
  • A Stella1,
  • I Godi1,
  • G Via1,
  • G Tavazzi1,
  • A Orlando1 and
  • B Bouhemad2
Critical Care201519(Suppl 1):P222


Published: 16 March 2015


Lung ultrasound (LUS) allows semiquantification of lung aeration in PEEP trials [1], pneumonia [2] and weaning [3]. LUS score is based on number/coalescence of vertical artifacts (B-lines) in longitudinal scan (LONG) [4]: the pleura is identified between two ribs and its visualization limited by intercostal space (ICS) width. We hypothesized that a transversal scan (TRANSV) aligned with ICS would visualize longer pleura and a higher number of artifacts, with better assessment of loss of aeration (LoA).


LONG and TRANSV were performed in six areas per lung (anterior, lateral and posterior, each divided into superior and inferior). Once LONG was performed, TRANSV was obtained by a probe rotation until the ribs disappeared. We considered pleural length, B-line number/coalescence, and subpleural/lobar consolidations. LUS score was assigned: 0 normal lung, 1 moderate LoA (≥3 well-spaced B-lines), 2 severe LoA (coalescent B-lines), 3 complete LoA (tissue-like pattern).


We enrolled 38 patients (21 males, age 60 ± 16 years, BMI 24.7 ± 4.7 kg/m2) corresponding to 456 ICSs. In 63 ICSs, a tissue-like pattern was visualized in both techniques. In the other 393, LONG versus TRANSV pleural length was 2.0 ± 0.6 cm (range 0.8 to 3.8; variance 0.31) versus 3.9 ± 0.1 cm (range 3.0 to 4.3; variance 0.1) (P < 0.0001), B-lines per scan were 1.1 ± 1.6 versus 1.8 ± 2.5 (P < 0.0001), coalescent B-lines were detected in 24 versus 30% (P < 0.05) and subpleural consolidations in 16 versus 22% (P < 0.05), respectively. LUS scores' prevalence significantly differed in LONG versus TRANSV (Figure 1).
Figure 1

LUS scores. *P <0.01 TRANSV versus LONG.


TRANSV visualizes significantly longer pleura and greater number of artifacts useful for lung disease assessment.

Authors’ Affiliations

Fondazione IRCCS Policlinico S. Matteo Hospital - University of Pavia
Centre Hospitalier Universitaire Dijon


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© Mongodi et al.; licensee BioMed Central Ltd. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.