Ignoring these lines means missing a window to treat fluid overload before the patient develops respiratory failure requiring intubation.
They rarely extend into the central part of the lung. Unlike blood vessels, which branch and taper, Kerley B lines are non-branching and end abruptly at the pleura.
While CHF is the most common cause, Kerley B lines are not 100% specific. They can also be seen in: kerley b
Septal lines in lung | Radiology Reference Article | Radiopaedia.org
When pressure in the pulmonary capillaries rises (e.g., due to heart failure), fluid leaks out of the vessels. Gravity pulls this fluid into the most dependent parts of the lung—the lower zones. The fluid accumulates in the interstitial space, specifically thickening those interlobular septa. Ignoring these lines means missing a window to
If you’ve ever looked at a chest X-ray and seen a cluster of tiny, horizontal lines at the lung bases, you might have dismissed them as blood vessels or artifact. But to a trained eye, those little lines are a major red flag. They are called , and they are one of the most classic signs of an overworked heart and fluid-filled lungs.
Anatomically, they represent the . In a healthy lung, these septa are too thin to be seen on a standard X-ray. However, when they become engorged with fluid, cells, or connective tissue, they become visible as the distinct "B lines". Primary Causes and Pathology While CHF is the most common cause, Kerley
Spotting Kerley B lines changes management.