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PATHO FINAL
N/A
25
Nursing
Undergraduate 2
04/27/2013

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Cards

Term
Pulmonary circulation
Definition
- facilitate gas exchange
-deliver nutrients to lung tissue
-act as a reservoir to left ventricle
-fliter microemboli, air, and other debris from circulation
Term
Gas exchange occurs only in...
Definition
...alveoli and terminal portions of alveolar ducts
Term
Pulmonary ventilation
Definition
inflow and outflow of air
Term
diffusion
Definition
02 and CO2 between alveoli and blood
Term
transport
Definition
of O2 and CO2 in the blood to and from cells
Term
regulation of respiration takes place in
Definition
brainstem and chemoreceptors
Term
Diaphragm and rib cage movement with inspiration
Definition
diaphragm contracts and moves downward
rib cage lifts and ribs separate
Term
atmospheric pressure and thoracic cavity pressure with inspiration
Definition
atmospheric pressure>thoracic cavity pressure
Term
Inspiration is a ______ process
Definition
active
Term
Diaphragm movement with expiration
Definition
diaphragm relaxes
Term
atmospheric pressure and thoracic cavity pressure with expiration
Definition
atmospheric pressure< thoracic pressure
Term
Expiration is a ______ process
Definition
passive
Term
surfactant
Definition
-reduces surface tension in the alveoli
-maintains inflation of lungs
-causes less effort needed to expand lungs
Term
Compliance
Definition
a measure of expansibility of lungs and thorax
Term
greater compliance means...
Definition
easier to change pressure to cause expansion of lungs and thorax
Term
conditions that decrease compliance
Definition
-pulmonary fibrosis
-pulmonary edema
-asthma, lung cancer, and other airway obstructions
-deformities of thoracic wall like kyphosis
Term
Oxygen-Hemoglobin Dissociation Curve
Definition
describes the % of Hbg saturated with O2 at any given pO2
Term
Hypoxia
Definition
lack of O2
Term
Early and Late Manifestations of Hypoxia
Definition
Early- restlessness, agitation, personality changes
Late- muscle incoordination, impaired judement, coma, cardiac arrest
Term
Central cyanosis
Definition
-affects mucous membranes and skin
-think because of lack of oxygen
Term
Peripheral cyanosis
Definition
cyanosis from cold; slowing of blood flow
Term
hypercapnia
Definition
an increase in CO2 in the blood
Term
Contributing factors to hypercapnia
Definition
•Alterations in CO2 production
•Disturbance in gas exchange function of the lung
•Abnormalities in chest wall and respiratory muscles
•Changes in the neural control of respiration
Term
Hypercapnia is only observed when...
Definition
...hypoventilation causes hypoxia
Term
Manifestations of hypercapnia
Definition
-headache
-red eyes
-flushed skin
- disorientation to coma
-tachypnea, tachycardia
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