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Respiratory acidosisEffects of resp acidosisVasoD, sweating, incr HR, mydriasis, asterixis, confusion, drowsiness, altered LOC when pCO2 >80CausesIncr PCO2 only caused by alveolar hypoventilation, never by incr CO2 production Decreased respiratory drive decr RRCNS CVA, tumour, infection (encephalitis), haemorrhage, spinal cord lesion above C4Drugs Narcotics and sedatives, ETOHDecreased chest wall movement decr TVNeurological NM disorders, Guillain-Barre, Myasthenia gravis, demyelinating disorders, Tetanus, transverse myelitis, spinal trauma, polioToxicity Muscle relaxants, Organophosphates, fentanyl, spider+snake venomRespiratory Trauma, surgery, chest wall deformity, Tension pneumothorax, pleural effusion Upper airway obstruction, kyphoscoliosis, severe arthritis, severe fibrosisMuscular Electrolyte abnormality, myopathy, muscular dystrophyEquipment Increased dead space, improper connectionObstructive pulmonary disease (chronic) incr dead space: COPD, asthma, pneumonia, very severe croup, Angioedema, severe pul oedema, severe pneumonia, inhaled FB, aspirationIncr inspired CO2: rebreathingCompensationAcute HCO3 incr 1 per 10 changes in CO2 from 40 1:10 Incr HCO3 expected = ( (pCO2 – 40) X 1 ) 10Chronic HCO3 incr 4 per 10 change in CO2 from 40 4:10 Incr HCO3 expected = ( (pCO2 – 40) X 4 )10Notes from: ................
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