NURS 4526 Lecture Notes - Lecture 12: Acute Respiratory Distress Syndrome, Acute Decompensated Heart Failure, Septic Shock
Document Summary
Shock is a syndrome characterized by decreased tissue perfusion and impaired cellular metabolism (hallmark of stroke). This results in an imbalance btwn the supply of and the demand for o2 & nutrients. When a cell experiences hypoperfusion, the demand for o2 and nutrients exceeds the supply. A life-threatening condition with a variety of causes. It is a common occurrence in the acute care settings. Defined as a mean arterial bp (mabp) inadequate to meet the needs of the tissue. It is characterized by the inability of the circulatory system to supply adequate o2 and nutrients to the tissues either because of: ineffective cardiac pump, ineffective circulatory system, inadequate blood volume. Demand for oxygen is not met by oxygen delivery. In early shock respiratory alkalosis is found primarily due to hyperventilation. In late stage of shock metabolic acidosis occurs due to accumulation of organic acids (lactic acid) from anaerobic metabolism. Low blood flow shock cardiogenic and hypovolemic shock.
