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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?
ph=
pK + log (HCO3/alpha x (pco2)
(pK=6.1, alpha=0.03)
used to calculate how u are going to compensate
What is metabolic acidosis compensation?
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
what is metabolic alkalosis compensatory mechanism?
=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)
What is compensation in Resp acidosis?
=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.
what is compensation in Resp alkalosis?
=compensation is renal
=get a 5 mM decrease in HCO3 for every 10mmHg decrease in PCO2
=you secrete bicarb and reabsorb protons (H+)
draw the davenport diagrahm
































h








here
Describe the davenport diagrahm









































h





















here
A change in movement along the buffer line is a change in co2=resp imbalance.
A change in movement along the CO2 isopleth is a metabolic imbalance.
1. Calculate pH if PCO2=80mmhg
HCO3=24mM
now draw it on a davenport diagram.
WHAT is compensation for the above prob?
Renal: for every 10 mmHg increase in PCO2=3.5 mM increase in HCO3.
Now, figure the new PCO2. then figure what increase in HCO3 is needed to compensate?
here
Now calculate pH after this compensation.
by putting it in the H/H then plot it.
Calculate pH if HCO3 is 28 mM (known PCO2=40mmHg.
here
draw davenport to show what it is.
(met alkalosis)
Calculate the neccessary compensation:
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
look at notes
for more practice!!!