Cardiovascular anatomy & physiology 2 Flashcards
What is the expected oxygen delivery in a 70-kg adult?
a. 20 mL/dL
b. 1000 mL/min
c. 250 mL/min
d. 15 mL/dL
b. 1000 mL/min.
_____________ tells us how many grams of oxygen are contained in a deciliter of arterial blood.
Oxygen content (CaO2)
What is the oxygen content equation?
CaO2= (Hgb x SaO2 x 1.34) + (PaO2 x 0.003)
What is the estimated oxygen content for a 70 kg male?
20 mL/dL
__________ tells us how much O2 is carried in arterial blood and how fast it’s being delivered to the tissues.
Oxygen delivery
What is the oxygen delivery equation?
Do2= Cardiac output x [(Hgb x SaO2 x 1.34) + (PaO2 x 0.003)] x 10
What is the estimated oxygen delivery in a 70 kg male?
1000 mL
__________ tells us how much oxygen is extracted by the tissues.
The oxygen extraction ratio (EO2)
What is the estimated oxygen extraction ratio?
25%
_____ tells us how much oxygen is consumed by the tissues
Oxygen consumption (VO2)
What is the estimated oxygen consumption?
250 mL/min or 3.5 mL/kg/min
_____________ tells us how much oxygen is carried in venous blood
Venous oxygen content
What is the estimated venous oxygen content?
15 mL/dL
Blood flow is inversely proportional to:
a. body temperature
b. vessel diameter
c. arteriovenous pressure difference
d. hematocrit
d. hematocrit
What is the basic equation for flow?
flow = (P1-P2)/resistance
Poiseuille’s law is an adaptation of Ohm’s law that incorporates
vessel diameter
viscosity
tube length
The best way to impact flow is to change
the radius because flow is directly proportional to the radius raised to the 4th power
Vascular resistance is primarily determined by the
radius of the arterioles
____________ can be used to predict if the flow will be laminar or turbulent
Reynolds’ number