Term
| Posture – CO decreases approx. ____ when rising from supine position to sitting (fowlers) position |
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Definition
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Term
| Factors that influence Cardiac Output |
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Definition
| •Body Size •Age •Posture – CO decreases approx. 10% when rising from supine position to sitting (fowlers) position. •Body Temperature – CO will generally increase secondary to increased chronotropic state. •The function of cardiac output is to supply oxygen and nutrients to the body tissue. •Anxiety •Environmental Heat And Humidity |
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Wt(Kg)^.425 x Ht(cm)^.725 x .007184
Units are Meters squared |
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CaO2 = (Hgb x 1.36 x SaO2) + (.0031 x PaO2)
Unit is Vol % |
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Definition
CvO2 = (Hgb x 1.36 x SvO2) + (.0031 x PvO2)
Unit is Vol % |
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| PAO2 = (PB - 47) x FiO2 - (PaCO2 / RQ) |
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Term
| Cardiac Index Normal Value |
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Definition
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Term
| Thermodilution technique advantages |
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Definition
| More rapidly performed, requires one person/catheter, no blood needed |
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Term
| Thermodilution technique disadvantages |
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Definition
| Wires may pose shock hazzard, not accurate in presence of shunts |
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Term
| Fick cardiac output technique advantages |
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Definition
| More accurate in low output states |
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Term
| Fick cardiac output technique disadvantages |
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Definition
| Requires patient to be at a steady state |
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Definition
| A passage between two blood vessels or between two sides of the heart as in cases where an opening exists in the wall which normally separates them, allowing for passage of blood |
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Definition
| a condition where a left-to-right shunt has gradually changed to a right-to-left shunt secondary to pulmonary hypertension. |
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Term
| Qualitative intracardiac shunt determination |
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Definition
| determines the presence of a shunt |
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Term
| Quantitative intracardiac shunt determination |
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Definition
| determines the presence and “size” of the shunt |
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Definition
| measurement of how much blood is flowing through the pulmonary vasculature |
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Definition
| measurement of how much blood is flowing through the systemic vasculature |
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Term
| What is the normal value for cardiac output returning to the LV without entering the pulmonary vasculature |
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Definition
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Definition
| no ventilation or perfusion |
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Term
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Definition
| no ventilation, normal perfusion, also called a capillary shunt |
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Definition
| normal ventilation, poor perfusion, also called venous admixture or shunt effect |
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Term
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Definition
| equal ventilation and perfusion |
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Term
| a way to calculate the amount of blood being shunted from the absolute shunt (anatomic + capillary) and the shunt effect (venous admixture). |
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Definition
| the physiologic shunt equation |
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Term
| Intrapulmonary shunting guidlines for interpretation < 10% |
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Definition
| is compatible with normal lungs |
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Term
| Intrapulmonary shunting guidlines for interpretation 10 - 19% |
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Definition
| is abnormal but not of clinical significance |
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Term
| Intrapulmonary shunting guidlines for interpretation 20 - 29% |
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Definition
| is clinically significant and may be life threatening |
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Term
| Intrapulmonary shunting guidlines for interpretation >30% |
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Definition
| is potentially life threatening |
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Term
| Right-to-left shunt most commonly caused by what? |
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Definition
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Term
| Indications for shunt studies |
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Definition
•Hemodynamic evaluation of patient's with congenital heart diseases.
•Unexplained desaturation (less than 95%)
–Suspect right-to-left shunt
–First rule out hypoventilation
–Other causes
–Corrective measures
•Administer O2
–If corrective measures don't help assume a right-left-shunt is present |
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Term
| If the RA exceeds the IVC/SVC by 7% (Mean SAT) or 11% (Highest SAT) |
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Definition
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Term
| If the RV exceeds the RA by 5% (Mean SAT) or 10% (Highest SAT) |
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Definition
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Term
| If the PA exceeds the RV by 5% (Mean SAT) or 5% (Highest SAT) |
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Definition
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