Clinical meaning
End-of-life (EOL) care encompasses the holistic management of patients in the final days to weeks of life, focusing on comfort, dignity, and quality rather than curative intervention. The dying process involves a predictable cascade of physiological changes as organ systems progressively fail. The cardiovascular system shows declining cardiac output with resultant peripheral vasoconstriction, mottling of the extremities (livedo reticularis), and eventual central cyanosis. Blood pressure gradually decreases and the pulse becomes weak, thready, and irregular. The respiratory system undergoes characteristic changes including Cheyne-Stokes breathing (cyclical pattern of increasing then decreasing respiratory depth with periods of apnea), terminal congestion commonly called the death rattle (caused by pooling of secretions in the oropharynx and trachea that the patient can no longer clear), and agonal breathing (irregular, gasping respirations occurring as brainstem function deteriorates). The neurological system shows progressive withdrawal from the environment: the patient first loses interest in surroundings, then becomes less responsive to verbal stimuli, and finally responds only to painful stimuli before becoming completely unresponsive. Importantly, hearing is believed to be the last sense lost, which has critical implications for...