Circulatory - Pt 2: Equations Flashcards
The Mean Arterial Pressure (MAP) is the [] blood pressure over the course of the [] cycle?
average; cardiac
What are the 2 main factors influencing Diastolic BP?
Heart Rate
Peripheral resistance
- Main Factors influencing Systolic BP
- [] Volume
- [] Compliance
- Main Factors Influencing Diastolic BP
- Heart []
- [] Resistance
- Main Factors influencing Systolic BP
- Stroke Volume
- Aorta Compliance
- Main Factors Influencing Diastolic BP
- Heart Rate
- Peripheral Resistance
With “Reynold’s Number - NR”, what do the following values represent…
< 2,000
>3,000
- < 2,000 = laminar flow
- >3,000 = turbulent flow
What is the main determining factor for “resistance?” and why?
Vessel Radius.
Its at r4, so any change could have huge effects to the R number.
The [] is a pressure reservoir
Aorta
[] [] is a mathematical equation that describes the variables that contriubte to Resistance…
Poiseuille’s Law
The “ballooning” of a blood vessel wall in reaction to turblent wall is called []
Aneurysm
What are the 2 main factors influencing Systolic BP?
Stroke Volume
Aorta Compliance
What factors effect the “R”, or Resistance variable, in the Blood Flow equation?
- [] of the blood vessel
- Blood []
- Characteristics of the blood vessel
- Blood viscosity
[] [] can be heard through auscultation as murmurs, or sometimes felt on the surface of the skin…
Turbulent Flow
Which of the following: increase/decrease of capacitance vessels, causes a decrease in the pressure of the overall system? Why?
Increase
If you increase the capacitance, you’re increasing “stretchyness” which would allow vessel walls to move/widen during blood flow. So if the radius increases due to capacitance…then the pressure would decrease
Blood Flow is [] proportional to the resistance of the blood vessel
Inversely
T/F
In Laminar Blood Flow, the blood at the periphery of a vessel travels the fastest.
FALSE
In ideal conditions the blood in the center of a vessel should travel the fastest - laminar Blood flow
If you graphed the pressure of the capillary vs arteries on a graph, the capillaries would have a smooth declining line. While the arteries would have pulsitile jumps in pressure. Why do we want to avoid those pulsitile pressure jumps in capillaries?
Our capillaries are extremely thin and would probably rip apart with all those pressure spikes.