DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Central venous catheterisation. Ultrasound image of the neck of a patient being used to locate the precise position of the internal jugular vein prior to a central venous catheter being inserted. A central venous catheter is a catheter (tube) placed into a large vein in the neck (internal jugular vein), chest (subclavian vein or axillary vein) or groin (femoral vein). It is used to administer medication or fluids, obtain blood tests, and directly obtain cardiovascular measurements such as the central venous pressure. Here it is passed through the jugular vein until the tip lies inside the superior vena cava, leading directly to the heart's right atrium.
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