Respiratory alkalosis: Difference between revisions
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**if HCO3 > 24 - (40-pCO2)/10 x 2.5 (+/-1) then there is a primary metabolic alkalosis, or acute respiratory alkalosis without time for metabolic compensation | **if HCO3 > 24 - (40-pCO2)/10 x 2.5 (+/-1) then there is a primary metabolic alkalosis, or acute respiratory alkalosis without time for metabolic compensation | ||
== | ==Differential Diagnosis== | ||
*[[Asthma]] | |||
*[[PE]] | |||
*[[DKA]] | |||
*[[Anxiety]] | |||
*[[Hypoxia]] | |||
*early [[Sepsis]]/fever/[[Pneumonia]] | |||
*[[Hyperthyroid]] | |||
*[[Sympathomimetics]] | |||
*[[Aspirin (Salicylate) Toxicity]] | |||
*Progesterone/[[pregnancy]] | |||
*Liver disease | |||
*[[CVA]] or other central cause | |||
==See Also== | ==See Also== | ||
Revision as of 03:51, 2 March 2015
Background
- alkalemia = pH >7.42
- respiratory alkalosis = pCO2 <38
- Cause = hyperventilation
- May lead to Hypocalcemia, Hypokalemia
- Check for a concurrent acid/base disturbance
- always check for an AG
- for every 10mm pCO2 <40, HCO3 expected to decrease by 1-3.5 mEq
- if HCO3 < 24 - (40-pCO2)/10 x 2.5 (+/-1) then there is a superimposed primary metabolic acidosis
- if HCO3 > 24 - (40-pCO2)/10 x 2.5 (+/-1) then there is a primary metabolic alkalosis, or acute respiratory alkalosis without time for metabolic compensation
Differential Diagnosis
- Asthma
- PE
- DKA
- Anxiety
- Hypoxia
- early Sepsis/fever/Pneumonia
- Hyperthyroid
- Sympathomimetics
- Aspirin (Salicylate) Toxicity
- Progesterone/pregnancy
- Liver disease
- CVA or other central cause
See Also
Source
KAJI 2011 Tintinalli, Kaji 2011