Calculations
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Raw | PIP-Plat/Flow (L/sec)
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| a/A ratio | Pao2/PAO2
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| Bicarb correction of base defecit | BE-Kg/4
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| BSA | (4xkg)+7/kg+90
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| CO-Fick method | O2 consumption/CaO2-CvO2
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| O2 consumption-estimated | 130xBSA
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| Dynamic compliance | Change in V/change in P
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| Static compliance | change in volume/PIP-total PEEP
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| Corrected Vt | Vte-tubing volume
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| Vd/Vt | PaCO2-PeCO2/PaCO2
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| Expired Minute ventilation | VtxRR
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| Alveolar minute ventiation | (Vt-Vd)xRR
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| CaO2 | (Hbx1.34xSaO2)+(PaO2x.003)
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| time constant | RxC
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| ventialtor rate needed for a desired PaCO2 | knownRRxKnownPaCO2/Desired PaCO2
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| TCT | Ti+Te
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| calculate a rate from TCT | 60sec/TCT in seconds
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| Calculating Te | TCT-Ti
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| RSBI | f/Vt
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| Female IBW | 105+5(60-HT in inches)
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| Male IBW | 106+6(60-HT in inches)
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| Qs/Qt | (PAO2-PaO2)x0.003/(CaO2-CvO2)+(PAO2-PaO2)x0.003
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| PAO2 | (Pb-PH2O)xFIO2-PaCO2x1.25
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| Normal a/A ratio | >60%
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| Average adult BSA | 1.7m2
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| Normal CO | 4-8L/min
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| Normal Cdyn | 30-40mL/cmH2O
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| Normal Cst | 40-60mL/cmH2O
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| Normal Vd/Vt-spontaneous | 20-40%
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| Normal Vd/Vt-on mechanical ventilation | 40-60%
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| Normal CaO2 | 16-20vol%
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| Normal shunt | <10%
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| Normal RSBI | <100
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| Desired Vt | Actual VtxActual PaCO2/Desired PaCO2
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| Desired frequency | Actual frequencyxActual PaCO2/Desired PaCO2
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| Normal PaO2/FIO2 ratio | 500
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| Normal PvO2 | 35-40mmHg
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| desired FIO2 | Desired PaO2xKnown FIO2/ KnownPaO2
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Created by:
thekaplankid
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