Final Exam Equations/Values to Know Flashcards by Alli Grant

Minute ventilation

VT x breaths/min

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Alveolar Ventilation

VA= (VT-VD) x Breaths/min

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Physiological Dead Space

VD= VT x ((PACO2- PECO2)/PACO2)

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Inspiratory Capacity

IC= VT + IRV

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FRC

ERV + RV

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VC or FVC

VT + IRV + ERV

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TLC

IRV+VT+ERV+ RV

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Compliance

C= V/P

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Transmural Pressure

PL= PA- PI

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Collapsing Pressure on Alveoli

P= 2T/R

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Airflow

Q= Change in P/R

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Peak Inspiration of VL

FRC + 1VT

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Normal Anatomical Dead Space

150mL

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PCO2 Value

40mmHg

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Normal FVC

80%

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Solubility of O2 in blood

.003

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Gas Diffusion across Alveolar-Pulmonary Capillary Barrier

V(dot)x= DL x DeltaP

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O2 content of blood equation

(Hb concentration x O2 binding capacity x % saturation) + Dissolved O2

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PO2 of alveolar gas value

100mmHg

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A-a gradient equation

PAO2- PaO2

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Alveolar Gas Equation

PAO2= PIO2-PACO2/R

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Normal A-gradient value

0-10 mmHg

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O2 delivery equation

CO x O2 content of blood

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Normal pulmonary arterial pressure

15mmHg

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Normal aortic pressure

100mmHg

Normal arterial PO2 value

100 mmHg

TBW value

60%

Plasma Osmolarity Equation

Posm= 2 x Na + (glucose/18) + (BUN/2.8)

Clearance Equation

C= UV/P

What percent of CO is RBF?

25%

RPF Equation

Cpah= Upah x V/Ppah

RBF Equation

RBF= RPF/1-hematocrit

GFR Equation

GFR= Uinulin x V/Pinulin

Filtration Fraction Equation

FF= GFR/RPF

Normal FF value

.2 or 20%

Filtered load Equation

GFR x plasma concentration

Excretion rate equation

Urine Flow rate x urine concentration

Reabsorption Rate Equation

Filtered Load - excretion rate

Secretion rate Equation

Excretion rate- filtered load

plasma glucose saturation value

350 mg/dL

Anion gap equation

(Sodium-Chlorine+ bicarbonate)

Normal value for anion gap

12 ml/eq

Normal GFR value?

100-140 ml/min

Flux equation

Flux= kf * ((hydrostatic in capillary- hydrostatic in tissue)-plasma colloid osmotic pressure)

What is the Tm for glucose?

375 mg/min

Normal Tm for PAH?

72 mg/min

Normal pH for arterial blood?

7.4

Normal pH for venous blood?

7.35

Normal amount of bicarbonate filtered each day?

4320 mEq/day

What is the HH clinical equation?

24 x (PaCO2/HCO3)

What is the shortcut equation for H+ from pH?

80-pH.xx

Velocity of blood flow equation?

v= Q/A

Blood Flow Equation?

Q= DeltaP/R

Cardiac Output Equation

MAP-RAP/TPR

Capacitance Equation

C=V/P

Normal pressure value at the aorta?

100 mmHg

Normal pressure value at the capillaries?

20 mmHg

Normal pressure value at the arterioles?

50mmHg

Normal pressure value at the vena cava?

4 mmHg

Normal Ejection Fraction

55%

Ejection Fraction Equation?

SV/EDV

Normal EDV value?

140 mL

Stroke Work Equation

Aortic pressure x stroke volume