ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Open heart surgery vital signs. Screen of a vital signs monitoring machine during open heart surgery. It is showing no heart beat and a lowered body temperature because the heart is attached to a heart-lung machine. A heart-lung machine takes over the function of the heart and lungs while the heart is temporarily stopped during surgery, allowing more time to operate. The machine oxygenates the blood and removes carbon dioxide. The body temperature is lowered to preserve tissue during the operation.
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