For many years the lung has been considered off-limits for ultrasound.
ALI/ARDS. B-Lines and comet tails. A Miller, MBChB FRCA FFICM, Practical approach to lung ultrasound, BJA Education, Volume 16, Issue 2, February 2016, Pages 39–45, ... • They look like comet tails (an old name for them). The correlation between comet-tail images and For many years the lung has been considered off-limits for ultrasound.

Table 1. Interstitial syndrome. Ultrasound lung comets (ULCs) are a nonionizing bedside approach to assess extravascular lung water. The main application of LUS for the cardiologist is the assessment of B-lines. “comet-tail image” is an echographic image detect-able with a cardiac ultrasound probe positioned over the chest.4 This image consists of multiple comet tails fanning out from the lung surface originating from water-thickened interlobular septa, and could provide useful information on EVLW. Several thyroid nodule features noted on ultrasound are suggestive of thyroid cancer. Comet-tail artefact must be differentiated from the ring-down artefact. Reading. The comet tail artefact is probably one of the most commonly and imprecisely used to describe vertical artefacts found in lung ultrasound. OBJECTIVE: Ultrasound artifacts arising from the lung-wall interface are either vertical (comet-tail artifacts) or horizontal. “comet-tail image” is an echographic image detect-able with a cardiac ultrasound probe positioned over the chest.4 This image consists of multiple comet tails fanning out from the lung surface originating from water-thickened interlobular septa, and could provide useful information on EVLW. In patients with no lung sliding, the presence of B lines or comet tails can still rule out pneumothorax, and using these signs combined improves the specificity and PPV of lung ultrasound for pneumothorax detection The comet-tail artifact: an ultrasound sign ruling out pneumothorax. However, it has been recently shown that lung ultrasound (LUS) may represent a useful tool for the evaluation of many pulmonary conditions in cardiovascular disease. Objective: This prospective study was conducted to evaluate the value of comet tail artifacts (long, vertical, well-defined, hyperechoic, dynamic lines, originating from the pleural line) in assessment of interstitial lung diseases (ILD) and compare them with the findings of chest high resolution computed tomography (HRCT) and pulmonary function tests (PFT). While small bright spots known as microcalcifications usually indicate a cancer, small bright spots with a comet tail are usually associated with a benign thyroid nodule. Spread from the pleural line and project vertically like a comet tail Hyperechoic (bright) Erase A-lines and move with lung sliding Suggest fluid at the subpleural interlobular septum surrounded by air-filled alveoli at the level of the probe Author information: (1)Service de Réanimation Médicale, Hôpital Ambroise Paré, Boulogne (Paris), France. How does the presence of additional artifacts (i.e. In the past, it has been thought that the ring-down artefact was a variant of comet-tail artefact because of a similar US appearance. US clip B lines from PACCMUS on Vimeo. Lichtenstein D(1), Mezière G, Biderman P, Gepner A.

B-Lines and comet tails. The main application of LUS for the cardiologist is the assessment of B-lines.
We studied the diagnostic accuracy of bedside lung ultrasound (the presence of a comet-tail sign), N-terminal pro-brain natriuretic peptide (NT-proBNP) and clinical assessment (according to the modified Boston criteria) in differentiating heart failure (HF)-related acute dyspnea from pulmonary (chronic obstructive pulmonary disease (COPD)/asthma)-related acute dyspnea in the prehospital setting. The goal of this study was to evaluate the frequency and types of small bright spots present in cancerous and non-cancerous thyroid nodules. Spread from the pleural line and project vertically like a comet tail Hyperechoic (bright) Erase A-lines and move with lung sliding Suggest fluid at the subpleural interlobular septum surrounded by air-filled alveoli at the level of the probe More than 3 B-lines in a single view is abnormal.


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