Final Exam Equations/Values to Know Flashcards
Minute ventilation
VT x breaths/min
Alveolar Ventilation
VA= (VT-VD) x Breaths/min
Physiological Dead Space
VD= VT x ((PACO2- PECO2)/PACO2)
Inspiratory Capacity
IC= VT + IRV
FRC
ERV + RV
VC or FVC
VT + IRV + ERV
TLC
IRV+VT+ERV+ RV
Compliance
C= V/P
Transmural Pressure
PL= PA- PI
Collapsing Pressure on Alveoli
P= 2T/R
Airflow
Q= Change in P/R
Peak Inspiration of VL
FRC + 1VT
Normal Anatomical Dead Space
150mL
PCO2 Value
40mmHg
Normal FVC
80%
Solubility of O2 in blood
.003
Gas Diffusion across Alveolar-Pulmonary Capillary Barrier
V(dot)x= DL x DeltaP
O2 content of blood equation
(Hb concentration x O2 binding capacity x % saturation) + Dissolved O2
PO2 of alveolar gas value
100mmHg
A-a gradient equation
PAO2- PaO2
Alveolar Gas Equation
PAO2= PIO2-PACO2/R
Normal A-gradient value
0-10 mmHg
O2 delivery equation
CO x O2 content of blood
Normal pulmonary arterial pressure
15mmHg
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