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15 Cards in this Set
- Front
- Back
what is hh eq, and why is the henderson/hasselbach equation used in acid base?
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ph=
pK + log (HCO3/alpha x (pco2) (pK=6.1, alpha=0.03) used to calculate how u are going to compensate |
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What is metabolic acidosis compensation?
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compensatory mechanism is respiratory.
=what you do is decrease your pco2 1.2mmhg for every 1mM decrease in HCO3. =you would increase our breathing to blow off co2 |
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what is metabolic alkalosis compensatory mechanism?
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=compensation is respiratory
=You get a 0.7 mmHg rise in your PCO2 for every 1mM increase in HCO3. =goal is to retain your PCO2 (it increases) |
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What is compensation in Resp acidosis?
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=Compensatory mech is renal
=YOu get 3.5mM increase in HCO3 per 10mmHg increase in PCO2 =you secrete protons and reabsorb bicarb =you will excrete proton (H+) and hold on to bicarb. |
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what is compensation in Resp alkalosis?
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=compensation is renal
=get a 5 mM decrease in HCO3 for every 10mmHg decrease in PCO2 =you secrete bicarb and reabsorb protons (H+) |
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draw the davenport diagrahm
h here |
Describe the davenport diagrahm
h here |
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A change in movement along the buffer line is a change in co2=resp imbalance.
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A change in movement along the CO2 isopleth is a metabolic imbalance.
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1. Calculate pH if PCO2=80mmhg
HCO3=24mM |
now draw it on a davenport diagram.
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WHAT is compensation for the above prob?
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Renal: for every 10 mmHg increase in PCO2=3.5 mM increase in HCO3.
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Now, figure the new PCO2. then figure what increase in HCO3 is needed to compensate?
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here
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Now calculate pH after this compensation.
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by putting it in the H/H then plot it.
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Calculate pH if HCO3 is 28 mM (known PCO2=40mmHg.
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here
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draw davenport to show what it is.
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(met alkalosis)
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Calculate the neccessary compensation:
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Compensation for Metabolic alkalosis: for every 1mM increase in HCO3, need a 0.7 mmhg increase in CO2.
calculate the pH with this compensation: here |
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look at notes
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for more practice!!!
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