NURS 245 Lecture Notes - Lecture 1: Hyperglycemia, Granuloma, Earlobe
Document Summary
Cellular death state the difference between apoptosis and necrosis: See this in infarcts in any tissue (except brain) Due to loss of blood and lack of o2 (if small enough dead tissue can be removed and repaired) Micro: cell outlines are preserved (cells look ghostly), and everything looks red. See this in infections and, for some unknown reason, in brain infarcts. Due to lots of neutrophils around releasing their toxic contents, liquefying the tissue. Gross: tissue is liquidy and creamy yellow (pus) Due to the body trying to wall off and kill the bug with macrophages. Gross: white, soft, cheesy-looking ( caseous ) material (dead cells accumulate and become rotting mass) Micro: fragmented cells and debris surrounded by a collar of lymphocytes and macrophages (granuloma) Dry gangrene: obstruction of blood flow to organ or part of body affected, area dry, cold, and black, usually toes, fingers, and tip of nose and earlobe are affected o.
