The Pathophysiologic Basis for Common Clinical Manifestation Ch.3 Flashcards
An individual’s normal breathing pattern is composed of
tidal volume (Vt), ventilatory rate, and inspiration- to- expiration (I/E ratio)
In a normal adult Vt is about ______ or ____ to ____
500mL (7 to 9 mL/kg)
Ventilatory rate is
12-20
I/E is about
1:2
_________ is defined as the “breathlessness” or “SOB” or the labored/ difficult breathing felt and described ONLY by the patient
Dyspnea
Common types of dyspnea include
- positional dyspnea
- cardiac dyspnea
- exertional dyspnea
- paroxysmal nocturnal dyspnea
- renal dyspnea
Positional dyspnea occurs only when pt is
in the reclining position; orthopnea
Cardiac dyspnea is_________ breathing, caused by _______ disease
labored breathing caused by heart disease (CHF)
Exertional dyspnea is provoked by
physical exercise
Paroxysmal nocturnal dyspnea is a form of respiratory distress related to
posture (especially reeling while sleeping).
Proxymal nocturnal dyspnea is associated with what diseases?
CHF with pulmonary edema
Renal dyspnea is difficulty in breathing as a result of
kidney disease
During normal periods of eupnea, the individual has no sensation of difficult breathing. What matches?
Demand- to- breath matches capability- to- breath
During periods of significant exercise, normal individual’s capability - to- breathe may be challenged to meet the
As ____________ consumption increases
increased demand- to -breath as oxygen consumption increases
Modified Medical Research Council (mMRC) Questionnaire is used for?
Accessing the Severity of Breathlessness in those who can speak
The Borg Dyspnea Scale is used in patients who
cannot communicate b/c of mouthpiece, ET tubes, tracheotomies
Abnormal ventilatory patterns happens when
- the anatomic alterations of the lungs associated w/ a specific disorder
- the pathophysiologic mechanism that develop b/c of the anatomic alterations
To evaluate and asses the various abnormal ventilatory patterns, the following ventilatory must first be understood (5)
-Lung compliance
-airway resistance
-peripheral chemoreceptors
-central chemoreceptors
-pulmonary reflexes
The ease with which the elastic forces of the lungs accept a volume of inspired air is known as
lung compliance
Compliance determines
how much air in liters the lungs will accommodate for each centimeter of water pressure change in distending pressure
Lung compliance can either
increase or decrease
Increased lung compliance is good except in
emphysema
Emphysema is when lungs have lost all
elasticity (hyperinflation)
Normal lung compliance is
0.1 L/cm H20