Respiratory alkalosis: Difference between revisions
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*respiratory alkalosis = pCO2 <38 | *respiratory alkalosis = pCO2 <38 | ||
*Cause = hyperventilation | *Cause = hyperventilation | ||
*May lead to | *May lead to [[Hypocalcemia]], [[Hypokalemia]] | ||
*Check for a concurrent acid/base disturbance | *Check for a concurrent acid/base disturbance | ||
**always check for an AG | **always check for an AG | ||
| Line 11: | Line 11: | ||
==DDX== | ==DDX== | ||
#Asthma | #[[Asthma]] | ||
#PE | #[[PE]] | ||
#DKA | #[[DKA]] | ||
#Anxiety | #Anxiety | ||
#Hypoxia | #Hypoxia | ||
#early sepsis/fever/pneumonia | #early sepsis/fever/pneumonia | ||
#Hyperthyroid | #[[Hyperthyroid]] | ||
#Sympathomimetics | #[[Sympathomimetics]] | ||
#[[Aspirin (Salicylate) Toxicity]] | #[[Aspirin (Salicylate) Toxicity]] | ||
#Progesterone/pregnancy | #Progesterone/pregnancy | ||
#Liver dz | #Liver dz | ||
#CVA or other central cause | #[[CVA]] or other central cause | ||
==See Also== | |||
[[Acid-Base]] | |||
==Source == | ==Source == | ||
Revision as of 08:17, 18 December 2013
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
DDX
- Asthma
- PE
- DKA
- Anxiety
- Hypoxia
- early sepsis/fever/pneumonia
- Hyperthyroid
- Sympathomimetics
- Aspirin (Salicylate) Toxicity
- Progesterone/pregnancy
- Liver dz
- CVA or other central cause
See Also
Source
KAJI 2011 Tintinalli, Kaji 2011