Practical Nursing PNH301 Lecture Notes - Lecture 6: Pallor, Croatian Radiotelevision, Crackles
26 Feb 2018
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Widespread abnormal cellular metabolism that occurs when the human need for oxygenation and tissue perfusion is not met to the level needed to maintain cell function. (cid:862)whole-(cid:271)od(cid:455)(cid:863) respo(cid:374)se. Any problem that impairs oxygen delivery to tissues and organs can start the syndrome of shock and lead to a life- threatening emergency. Causes and initial manifestations of each type may vary but hypotension and anaerobic cellular metabolism eventually result in the common key features of shock. Skin cool to the touch, pale to mottled. **may have more than one type at the. Occurs when low circulating blood volume causes a mean arterial pressure (map) de(cid:272)rease; the (cid:271)od(cid:455)(cid:859)s o(cid:454)(cid:455)ge(cid:374) (cid:374)eed is (cid:374)ot met. Commonly caused by hemorrhage (external or internal) and dehydration. Actual heart muscle is unhealthy, and pumping is directly impaired. Myocardial infarction is the most common cause of direct pump failure. Blood volume is not lost but is distributed to the interstitial tissues where it cannot circulate and deliver oxygen.
