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NCI Dictionary of Cancer Terms


subarachnoid block  listen  (sub-uh-RAK-noyd blok)

  A temporary loss of feeling in the abdomen and/or the lower part of the body. Special drugs called anesthetics are injected into the fluid in the lower part of the spinal column to cause the loss of feeling. The patient stays awake during the procedure. It is a type of regional anesthesia. Also called SAB, spinal anesthesia, and spinal block.