PULMONARY CIRCULATION, PULMONARY EDEMA, PLEURAL FLUID Flashcards
Two circulations
- high-pressure, low-flow circulation
- low-pressure, high-flow circulation
supplies systemic arterial blood to the trachea, the
bronchial tree (including the terminal bronchioles) the
supporting tissues of the lung, and the outer coats (adventitia) of the pulmonary A & V
high-pressure, low-flow circulation
branches of the thoracic aorta
bronchial arteries
supply most of this systemic arterial blood at a pressure that is only slightly lower than the aortic pressure.
bronchial arteries
supplies venous blood from all parts of the body to the
alveolar capillaries
low-pressure, high-flow circulation
where oxygen (O2) is added, and carbon dioxide (CO2)
is removed
alveolar capillaries
Pulmonary veins empty their effluent blood into __ atrium
left
Systolic pressure of the normal human averages
25 mm Hg
diastolic pressure averages about ___
0 to 1 mm Hg
During systole = pressure in the pulmonary artery is essentially ____ the pressure in the right ventricle.
equal to
Pulmonary Capillary Pressure = about ___
7 mm Hg
left atrial pressure can be estimated with
pulmonary wedge pressure
pressure measured through the catheter
Wedge pressure
Use to study changes in pulmonary capillary pressure
and left atrial pressure in patients with congestive heart
failure
Wedge pressure
Blood volume of the lungs
450 milliliters
The ___ Serve as a Blood Reservoir
Lungs
Rise of ___ concentration then causes constriction of small arteries and arterioles
calcium
any time the lung alveolar air pressure becomes ___ than the capillary blood pressure, the capillaries close and there is
no blood flow
greater
Zones of pulmonary blood flow
Zone 1: No blood flow during all portions of
the cardiac cycle
Zone 2: Intermittent blood flow only during
the peaks of pulmonary arterial pressure
Zone 3: Continuous blood flow because the
alveolar
left atrial pressure in a healthy person almost never
rises above ____ (even during exercise)
+6 mm Hg
causes the pulmonary interstitial fluid pressure
to rise from the negative range into the positive
Pulmonary Edema
the space between the parietal and visceral pleurae
Pleural space
