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19 Cards in this Set
- Front
- Back
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r atrial pressure nl
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0-8 mm HG
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R ventricle pressure by S-G catheter nl
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0-8 mm Hg end diastolic, 15-30 systolic
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pulmonary artery pressures nl
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3-12 end diastolic
15-30 end systolic |
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Wedge pressures nl
a wave v wave mean |
a wave 3-15 mm Hg
V wave 3-12 mean 5-12 mm Hg |
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what is LAP or left atrial pressure a reflection of?
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LVEDP, in pt w nl mitral valve
LVEDP is a reflection of LV preload |
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How is cardiac output measured?
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injecting a known temperature and known volume of fluid (D5W)prox to tip of PA catheter, and then measuring temp
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Mixed venous oyxgen sat
SVO2 what is normal level? |
78%
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systemic venous resistance
SVR |
SVR=(MAP -CVP)80/CO
reflects vascular tone: constricted vs dilated |
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what is the hallmark of hypovolemia?
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low wedge pressure
low LV preload->low CO->high SVR tx: fluids |
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hallmark of cardiogenic shock
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low CO (pump not working)-> high wedge pressure(pump backs up)-> increased SVR
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Hallmark of distributive shock
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loss of SVR-> initially low wedge pressure->initally high CO (warm septic shock)-> which becomes low w shock progression
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treatment of disstributive shock
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1. remove source
2. fluids 3. vasopressors (to increase SVR) |
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hallmark of obstructive shock
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low filling pressure-> low wedge pressure-> low CO-> high SVR
tx: resolve obstructive problem and give fluids |
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examples obstructive shock
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pulmonary embolus, massive or tension PTX
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examples distributive shock
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sepsis, spinal and anaphylactic shock--total loss of SVR
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Hypovolemic shock
CO Wedge SVR |
CO low
Wedge LOW SVR high |
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Cardiogenic shock
CO Wedge SVR |
CO LOW
Wedge High SVR High |
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Distributive shock
CO Wedge SVR |
CO High-Nl-Low
Wedge low SVR LOW |
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Obstructive shock
CO Wedge SVR |
CO Low
Wedge Low SVR High |
