peripheral circulation Flashcards Preview

PHYSIOLOGY > peripheral circulation > Flashcards

Flashcards in peripheral circulation Deck (31)
Loading flashcards...
1
Q

peripheral circulation

A
  • pulmonary circuit
  • systemic circuit
  • R and L heart ventricle
2
Q

RIGHT VENTRICLE

A
  • weaker
3
Q

LEFT VENTRICLE

A
  • stronger

- more powerful pump

4
Q

systemic circuit

A
  • higher pressure
5
Q

flow to pulmonary and systemic circuit

A
  • equal
6
Q

RIGHT AND LEFT VENTRICLE

A
  • has EQUAL CARDIAC OUTPUT

- FLOW EQUAL

7
Q

pulmonary arterial blood and R atrium has

A
  • the same systemic mixed venous blood entering
8
Q

RIGHT ATRIUM (S.C)

A
  • 0 mm Hg pressure
9
Q

peripheral veins (S.C)

A
  • 15 mm Hg
10
Q

pressure gradient (S.C)

A
  • 93 mm Hg
  • great pressure gradient
  • to facilitate the return of blood to the heart
  • aorta==> RA
  • pressure gradient is proportional to venous return
11
Q

R ventricle (P.C)

A
  • 25/0 mm Hg
12
Q

L ventricle (S.C)

A
  • 120/0 mm Hg
13
Q

pulmonary artery (P.C) (systolic25/diastolic8 )

A
  • 25/8 mm Hg
14
Q

aorta (S.C) (systolic 120/ diastolic 80)

A
  • 120/80 mm Hg
15
Q

Mean pulmonary artery or pulmonary wedge pressure (P.C)

A
  • 15 mm Hg

- for LV pressure measurement

16
Q

mean arterial blood pressure (S.C)

A
  • 93 mm Hg
17
Q

capillary (P.C)

A
  • 7-9 mm Hg
18
Q

capillary skeletal renal glomerular pressure (S.C)

A

30 mm Hg

45-50 mm Hg

19
Q

L atrium (P.C)

A
  • 5- 10 mm Hg
20
Q

pressure gradient (P.C)

A
  • 15-5= 10 mm Hg
21
Q

pulmonary circuit

A
  • begin with pulmonary artery and ends with pulmonary vein

- pressure difference PA-PV=10

22
Q

systemic circuit

A
  • begins with aorta and ends in right atrium (0 mm Hg)

- pressure difference aorta - RA= 93

23
Q

patient with R ventricular failure develop peripheral edema RV (25)==>RA(0)

A
  • normal pressure of 25 mmHg in RV will increase due to backing up of blood 40 mm Hg then normal pressure in RA 0 due to increase in the pressure in RV pressure in RA will become 20
  • pressure gradient systemically 93 mm Hg make it 100
  • 100 minus 20 pressure from RA
  • 80 mm Hg
  • therefore DECREASE IN PRESSURE GRADIENT causing decrease in venous return causing stasis of blood in peripheral veins
  • causing INCREASE HYDROSTATIC PRESSURE in the capillary
  • INCREASE FILTRATION
    = EDEMA
24
Q

DECREASE VENOUS RETURN

A
  • increase capillary pressure that leads to edema
25
Q

systemic circuit

A
  • AORTA
  • ARTERIES
  • ARTERIOLES
  • CAPILLARIES
  • VENULES
  • VEINS
  • VENA CAVAE
26
Q

ARTERIOLES

A
  • has the GREATEST PRESSURE DROP
  • 80 TO 40 mm Hg
  • due to massive branching of vessels
  • increases cross sectional area
  • decrease fluid in vessel
    BENEFITS
  • low pressure in the capillaries to facilitate the filtration and exchange
27
Q

AORTA

A
  • SMALLEST CROSS- SECTIONAL AREA

- highest velocity

28
Q

CAPILLARIES

A
  • LARGEST CROSS- SECTIONAL AREA

- lowest velocity

29
Q

velocity is

A
  • inverse to cross sectional area

- lowest velocity

30
Q

systemic VEINS

A
  • has the LARGEST blood volume

- very high compliance compared to systemic ARTERIES

31
Q

pulmonary system/VESSELS

A
  • has the second largest blood volume

- very high compliance systemic ARTERIES