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Ultrasound diagnosis of alveolar consolidation in the critically ill

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Abstract

Objective

Alveolar consolidation is a basic concern in critically ill patients. Radiography is not a precise tool, and referral to CT raises problems (transport, irradiation). The aim of this study was to assess the utility of ultrasound in the diagnosis of alveolar consolidation.

Design

Prospective clinical study.

Setting

The medical ICU of a university-affiliated teaching hospital.

Patients

A total of 65 cases of alveolar consolidation proven on CT were compared to 53 CT controls.

Measurements

Alveolar consolidation was defined as a tissue-like pattern visible at the chest wall, arising from the pleural line and devoid of centrifugal inspiratory dynamics.

Results

Feasibility was 99%. In 65 cases of alveolar consolidation, ultrasound was positive in 59 and negative in 6. In 52 analyzable controls, ultrasound was negative in 51 and positive in 1. Sensitivity of ultrasound was 90% and specificity 98%. A concordance test showed a Kappa coefficient of 0.89. Among 62 posterior locations on CT, ultrasound showed posterior consolidation patterns in 56 cases and was negative in 6. Ultrasound showed anterior involvement in all 3 cases of whole lung consolidation.

Conclusions

Ultrasound provides a reliable non-invasive, bedside method for accurate detection and location of alveolar consolidation in critically ill patients.

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Acknowledgement

We wish to thank David Marsh, PhD, for the translation of this study, Philippe Aegerter, MD, and Gauthier Maillard, MD, for their precious advice. The X-.rays and CTs were taken at the department of Prof. Pascal Lacombe, to whom we are grateful. Lastly, we thank Prof. François Jardin who made this work possible.

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Correspondence to Daniel A. Lichtenstein.

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An editorial regarding this article can be found in the same issue (http://dx.doi.org/10.1007/s00134-003-2083-6)

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Lichtenstein, D.A., Lascols, N., Mezière, G. et al. Ultrasound diagnosis of alveolar consolidation in the critically ill. Intensive Care Med 30, 276–281 (2004). https://doi.org/10.1007/s00134-003-2075-6

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