Kerley b lines

Passive hyperaemia of the of the lungs caused by mitral stenosis or heart failure gives remarkable and very varied x-ray appearances. A severe attack of hyperaemia always leaves permanent radiologic evidence behind it…the shadows of perivascular lymphatics persist as fine, sharp lines, most marked at the bases and near the hila. They are of three types, kerley b lines. A Lines several inches long, rather ragged kerley b lines radiating from the hilum.

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Kerley b lines

At the time the article was last revised Joachim Feger had no financial relationships to ineligible companies to disclose. Septal lines , or Kerley lines , are seen when the interlobular septa in the pulmonary interstitium become prominent. It may be because of lymphatic engorgement or edema of the connective tissues of the interlobular septa. They usually occur when pulmonary capillary wedge pressure reaches mmHg. They represent the thickening of the interlobular septa that contain lymphatic connections between the perivenous and broncho-arterial lymphatics deep within the lung parenchyma. On chest radiographs, they are seen to cross normal vascular markings and extend radially from the hilum to the upper lobes. Kerley A lines are less frequent than Kerley B and C lines and are usually not seen in the absence of the other two. These are thin lines cm in length in the periphery of the lung s. They are perpendicular to the pleural surface and extend out to it. They represent thickened subpleural interlobular septa and are usually seen at the lung bases. Kerley C lines are short lines which do not reach the pleura unlike B or D lines and do not course radially away from the hila unlike A lines.

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Kerley lines are a sign seen on chest radiographs with interstitial pulmonary edema. They are thin linear pulmonary opacities caused by fluid or cellular infiltration into the interstitium of the lungs. They are named after Irish neurologist and radiologist Peter Kerley. They are suggestive for the diagnosis of congestive heart failure , but are also seen in various non-cardiac conditions such as pulmonary fibrosis , interstitial deposition of heavy metal particles or carcinomatosis of the lung. Chronic Kerley B lines may be caused by fibrosis or hemosiderin deposition caused by recurrent pulmonary edema.

At the time the article was last revised Doaa Faris Jabaz had no financial relationships to ineligible companies to disclose. Pulmonary edema is a broad descriptive term and is usually defined as an abnormal accumulation of fluid in the extravascular compartments of the lung 1. One method of classifying pulmonary edema is as four main categories on the basis of pathophysiology which include:. The chest radiograph remains the most practical and useful method of radiologically assessing and quantifying pulmonary edema 3,4. There is a general progression of signs on a plain radiograph that occurs as the pulmonary capillary wedge pressure PCWP increases see pulmonary edema grading. Whether all or only some of these features can be appreciated on the plain chest radiograph, depend on the specific etiology 1.

Kerley b lines

Federal government websites often end in. The site is secure. Pulmonary edema is a common clinical entity caused by the extravascular movement of fluid into the pulmonary interstitium and alveoli. The four physiologic categories of edema include hydrostatic pressure edema, permeability edema with and without diffuse alveolar damage DAD , and mixed edema where there is both an increase in hydrostatic pressure and membrane permeability. As radiographic manifestations and etiologies are varied, an appreciation for both the common and uncommon manifestations and causes of pulmonary edema is essential for accurate diagnosis. Pulmonary edema is one of the most common entities encountered on routine chest imaging in both the inpatient and outpatient settings. It is caused by the extravascular movement of fluid into the pulmonary interstitium and alveoli. Radiographic manifestations of this entity are varied, and accurate radiographic diagnosis is essential for proper management of this common condition. Additionally, understanding the cause of these fluid shifts is critical to patient management and radiographic assessment can help in distinguishing among the various causes. The physiologic determinates of edema include 1 hydrostatic pressure, defined as the pressure within the capillaries driving fluid out of the vessels, 2 oncotic pressure, described as pressure related to the macromolecules in the blood which help to retain fluid in the vessels, and 3 membrane permeability, the ease with which fluid passes through the capillary or alveolar walls Fig.

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They usually occur when pulmonary capillary wedge pressure reaches mmHg. These are short parallel lines at the lung periphery. View Joachim Feger's current disclosures. Advertisement advertisement. View Behrang Amini's current disclosures. Non Necessary non-necessary. They are short, fine lines throughout the lungs, with a reticular appearance. Aortic unfolding Dense artery sign Halo sign. Description Kerley lines are described as types A, B or C. These cookies will be stored in your browser only with your consent. Share Add to. Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Preference cookies are used to store user preferences to provide content that is customized and convenient for the users, like the language of the website or the location of the visitor.

Kerley B lines are a radiological sign observed on chest x-rays and can be a valuable diagnostic tool in respiratory care. This article will provide an overview of Kerley B lines, including their appearance, underlying causes, and clinical significance.

Loading Stack - 0 images remaining. Article Talk. Contents move to sidebar hide. Reed JC. Case study, Radiopaedia. By System:. Contact Us. They represent thickened subpleural interlobular septa and are usually seen at the lung bases. Sign Up. Septal lines in lung.