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Formulas & Norms Test

Enter the letter for the matching Answer
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1.
SaO2
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2.
PaO2 <80 on FIO2 <60
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3.
Cs (CVAE)
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4.
PaO2 desired
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5.
PAP
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6.
CaO2
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7.
Magic Box
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8.
HCT
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9.
Refractory hypoxemia
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10.
VD
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11.
PaCO2 to increase with pt on mech vent
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12.
TCT
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13.
MIP/NIF
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14.
A-aDo2
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15.
PCWP
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16.
PaO2-to increase while pt on mech vent
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17.
QT
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18.
Alveolar Air Equation
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19.
FIO2 for weaning
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20.
Flow required for a 1 second I-time and a VT of 750cc?
A.
total cycle time, 60 sec/RRset, amount of time for a single breath cycle both I and E. If I:E is 1:2 then TCT is 3
B.
V/Q mismatch
C.
<40-50% weaning
D.
TIIVR+TIVER, FRC=TIIVR=TLC, IRV, IC, VC, RV, + TIVER, FRC=TLC, IRV, VT, ERV, RV, FRC
E.
pulmonary artery wedge pressure, norm 5-10 mmHg, >18 is inconsistent with weaning, left vent failure, fluid overload
F.
Max Inspiratory Press, norm -80 - -100, > -20 support indicated, <-20 weaning (remember that negative numbers are larger as they become less, -25 < -20)
G.
PaO2 (desired) x FIO2 (current)/PaO2 (current)=FIO2 required to bring PaO2 to desired level. Example of pt on 40% FIO2, PaO2 of 53 and wanting PaO2 of 80, calc is (80x.4)/53 equals .60, so increase FIO2 to 60%
H.
Deadspace volume, VD=(VT-VA), norm is 33% of VE, 1 mL/lb IBW or 2.2mL/kg (approx 150 ml)
I.
(pb-47)FIO2-(PaCO2x1.25), norm 80-100mmHg (can reach 675 on 100%), press of O2 in the Alveoli at any given Pb, represents potential for arterial oxygen
J.
40-50%
K.
norm 16-20 vol% (Hbx1.34)SaO2 + (PaO2x.003) total amount of O2 carried in 100ml of blood, combined content of O2 carried on Hb and dissolved in plasma, (can be reduced by <Hb, anemia or <CO)
L.
pulmonary artery pressure, norm 25/10 (20-35/5-15), >35/15 is inconsistent with weaning, pulm hypertension, left vent fail, fluid overload
M.
>PIP, >RR, >PEEP, or >FIO2
N.
<PIP, <RR, >PEEP
O.
hypoxemia that does not respond to O2 therapy
P.
cardiac output, norm 5L/min (4-8)
Q.
.750 equals L/sec x 1 or .750L/sec flow. To convert to L/min .750 x 60 equals 45L/m, this is the vent flow setting to deliver a VT in 1 second I-time.
R.
static compliance, norm for vent pt is .035-.055L/cmH20 or 35-55mL/cmH20, calc is Vt/(Pplat-PEEP), represents the combination of lung elasticity and chest wall recoil while on vent. Down with stiff lungs, >35ml/cnH2O weaning
S.
A-a gradient, norm 5-10 mmHg on .21, 30-60 on 100%, >350=mech support, <350 weaning. Represents potential to Oxygenate vs. the amount of O2 in the artery. Every 50mmHg is approx. 2 percent shunt above norm of 2-5%
T.
97-100%
Type the Answer that corresponds to the displayed Question.
incorrect
21.
PaCO2-to decrease with pt on mech vent
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22.
IBW M
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23.
SvO2
Type the Question that corresponds to the displayed Answer.
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24.
perfusion in excess of ventilation
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25.
Deadspace to VT ratio, norm 24-40%, >60 indicates support, <60% wean, increase (w/no change in VE) indicates decreased blood flow to alveoli, usually caused by emboli, excessive PEEP, or emphysema
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26.
PaO2/FIO2, norm 350-450mmHg, <300 indicates acute lung injury, <200 indicates ARDS, >200=weaning, measures o2 efficiency
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27.
VEtot-(VTset x RRset)/(RRtot-RRset) Measured when machine in SIMV mode, represents what the patient is actually breathing on his/her own.
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28.
represents relationship for volume (Liters), flow (L/sec) and time (seconds). V eq F x T or F eq V/T
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29.
ventilation in excess of perfusion (pulm emboli)
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30.
Pulmonary Shunt equation (CcO2-CaO2)/(CcO2-CvO2) Norm 2-3%, >20% vent indication, <20% weaning, >30% is life threatening. Measures % of QT not exposed to ventilation, shunts caused by atelectasis, edema, pneumonia, pneumothorax, obstructions

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