Equations and Labs Flashcards
Arterial pH
7.35-7.45
Venous pH
7.30-7.40
Arterial pCO2
35-45 mmHg
Venous pCO2
40-50 mmHg
Arterial pO2
80-100 mmHg
Venous pO2
35-40 mmHg
Arterial Bicarb
22-26 mmol/L
Arterial Base Excess
-2 to +2 mEq/L
SO2 Arterial
93-97%
SO2 Venous
70-75%
Total Calcium
2.18-2.58 mmol/L
Ionized Calcium
1.05-1.30 mmol/L
Cholesterol
Less than 5.2 mmol/L
LDL
Less than 3.37 mmol/L
HDL
Greater than 0.9 mmol/L
Female creatinine
50-90 micromol/L
Male creatinine
70-120 micromol/L
Fasting glucose
3.3-5.8 mmol/L
Magnesium
0.75-0.95 mmol/L
Osmolarity
280-300 mmol/kg
Potassium
3.5-5.0 mmol/L
Sodium
135-145 mmol/L
Blood Urea Nitrogen
2.5-8.0 mmol/L
Lactate 0.5-2.2
mmol/L
ALT
3-36 U/L
AST
0-35 U/L
Troponin
Less than 0.01 microgram/L
INR
0.9-1.2
Partial thromboplastin time
28-38 seconds
prothrombin time
10-13 seconds
Fibrinogen
1.8-4.0 grams/L
Male Hemoglobin
140-174 grams/L
Male Hematocrit
0.42-0.52
Male RBC Count
4.4-5.7 x 10^12/L
Male WBC Count
4-10 x10^12 /L
Male Platelet Count
130-400 x10^9 /L
Female Hemoglobin
123-157 grams/L
Female Hematocrit
0.37-0.46
Female RBC Count
4.0-5.2 x10^12/L
Female WBC Count
4-10 x 10^12/L
Female Platelet Count
130-400 x 10^9/L
Systolic Arterial Pressure
100-140 mmHg
Diastolic Arterial Pressure
60-90 mmHg
Mean Arterial Pressure
65-100 mmHg
Pulmonary Artery Systolic Pressure
15-30 mmHg
Pulmonary Artery Diastolic Pressure
4-12 mmHg
Mean Pulmonary Artery Pressure
9-16 mmHg
Pulmonary Capillary Wedge Pressure
2-12 mmHg
Central Venous Pressure
0-8 mmHg
Systemic Vascular Resistance
900-1400 dynessecondcm^-5
Pulmonary Vascular Resistance
150-250 dynessecondcm^-5
Normal Stroke Volume
60-130 mL/beat
Heart Rate
60-100 beats/minute
Cardiac Output or Q
4-8 LPM
Cardiac Index
2.5-4 LPM/m^2
Systemic Oxygen Consumption (VO2)
200-300 mL/min
Cardiac Output equation
CO= HR x SV
MAP Equation
DBP+ 1/3 (pulse pressure)
Systemic Vascular Resistance Equation
[(MAP-CVP)/CO] x80
Pulmonary Vascular Resistance Equation
[(MPAP-PCWP)/CO] x80
VO2 (Modified Fick Equation)
(CaO2-CvO2) xCO
Oxygen Delivery Equation
CaO2 x CO
Arterial or Venous Oxygen Content Equation
Hgb (in g/dL) x 1.34 x SaO2+ PaO2x0.003= mL O2/dL
Adult Male Blood Volume Factor
75 mL/kg
Adult Female Blood Volume Factor
70 mL/kg
Paediatric Blood Volume factor
80 mL/kg
Hematocrit calculation
RBC/TBV
3/16 Tubing constant
5.4 mL/foot
1/4” tubing constant
9.65 mL/foot
3/8” tubing constant
21.71 mL/foot
1/2” tubing constant
38.61 mL/foot
Henderson Haselbalch Equation of Blood
pH= 6.1 log {[Bicarb]/(PCO2x 0.03)}
Boyle’s Gas Law
Volume is inversely proportional to pressure
Charles’s Gas Law
Volume is proportional to temperature
Gay-Lussac Gas Law
Pressure is proportional to Temperature
Ideal Gas Law
PV=nRT, n=8.314, Temp is in Kelvin (add 273)
Graham’s Law
Diffusion of gasses proportional to square root of Molecular Masses
Diffusability of Carbon dioxide to oxygen
CO2 is 19 x O2 (Graham’s Law)
Fick’s Law
Diffusion across a membrane is proportional to surface area, pressure difference and diffusion coefficient, inversely proportional to thickness of membrane.
Diffusion coefficient is the square of the molecular weight.
Co2 vs oxygen solubility
CO2 is 24x more soluble than O2 (which is 0.003)
Flow of fluid vs velocity equation
Q=velocity/area= V/pi r^2
Reynold’s Equation
Re= 2(V)(radius)(density)/viscosity, if Re>2000 then flow is considered turbulent
Bernoulli’s Equation
P+ 1/2(density)(velocity)^2+ (density)(G)(height)=constant
Poiseuille’s Equation
Q=pi(radius)^4(pressure)/8(density)(length)
Laplace’s Law
wall tension=(pressure)(radius)/2(wall thickness)
Estimated bicarb dose
(0.3)(weight)(base deficit)= mmol to add
