EUH Dressler Case Conference: In chest x-rays, what is the water bottle sign?

Bottom Line: In patients with pericardial effusion, the water bottle sign appears when the chest x-ray’s cardiac silhouette has a globular shape that looks like a water bottle as the result of slowly accumulating fluid. In the screenshot from YouTube below, the four images show a normal chest x-ray (top left corner), a patient with cardiomegaly (lower right corner), and a chest x-ray with a water bottle sign (lower right corner). The water bottle shape appears in the upper right corner.
water bottle sign

Reference for Image: Hammadshams. Chest X-Ray – Cardiomegaly or No Cardiomegaly – Water Bottle Sign. https://www.youtube.com/watch?v=oG_bE2x5LG8. Accessed January 23, 2018.

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About Lisa

I have been a Clinical Informationist (aka Medical Librarian) for Emory University since September 2013. Prior to that, I was a Medical Librarian for Lincoln Memorial University (LMU) from March 2007 to August 2013 and served its DeBusk College of Osteopathic Medicine, Caylor School of Nursing, and allied health programs. From January 2002 - March 2007, I served the Medical Assisting (MA), Occupational Therapy Assistant, Physical Therapy Assistant, Radiologic Technologist, and Nursing programs at South College in Knoxville, Tennessee. I graduated from The University of Tennessee School of Information Sciences with a Master of Science degree in December 2000.
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