Shared Flashcard Set

Details

respiratory
respiratory system
25
Nursing
Undergraduate 1
04/07/2010

Additional Nursing Flashcards

 


 

Cards

Term
what is tidal volume?
Definition
amount of air inhaled or exhaled with each breath under resting conditions
Term
what is the average TV for males and females?
Definition
500 ml
Term
what does IRV stand for?
Definition
inspiratory reserve volume
Term
define Inspiratory reserve volumes
Definition
amount of air that can be forcefully inhaled after a normal tidal volume inhalation
Term
what does ERV stand for?
Definition
expiratory reserve volume
Term
what does ERV stand for?
Definition
expiratory reserve volume
Term
define ERV.
Definition
amount of air that can be forcefully exhaled after a noraml tidal volume exhalation
Term
what doe RV stand for?
Definition
residual volume
Term
define RV
Definition
amount of air remaining in the lungs after a forced exhalation
Term
what does TLC stand for?
Definition
total lung capacity
Term
define TLC?
Definition
max amount of air contained in the lungs after a max inspiratory effort: TLC=TV+IRV+ERV+RV
Term
what does VC stand for?
Definition
vital capacity
Term
define VC.
Definition
max amount of air that can be expired after a max inspiratory effort: VC=TV+IRV+ERV
Term
what does IC stand for?
Definition
inspiratory capacity
Term
define IC
Definition
max amount of air that can be inspired after a normal expiration. IC=TV+IRV
Term
what does FRC stand for?
Definition
functional residual capacity
Term
define FRC.
Definition
volume of air remaining in the lungs after a normal tidal volume expiration: FRC=ERV+RV
Term
what is lung compliance?
Definition
the ease with which lungs can be expanded; specifically, the measure of the change in lung volume that occurs with a given in transpulmonary pressure
Term
what two main factors determine lung compliance?
Definition
-distensibility of the lung tissue and surrounding thoracic cage
-surface tension of the alveoli
Term
what is Alveolar ventilation rate (AVR)?
Definition
measures the flow of fresh gases into and out of the alveoli during a particular time interval; AVR (ml/min)= frequency (breaths/min) X TV-dead space ( ml/breath)
Term
slow, deep breathing ______ AVR and rapid, shallow breathing ________ AVR
Definition
increases, decreases
Term
what is the sequence of events for inspiration?
Definition
1. inspiratory muscle contract, 2. thoracic cavity volume increases, 3. lungs stretched;intrapulmonary volume increases 4. intrapulmonary pressure drops 5. air flows into the lungs down its pressure gradient until intrapulmonary pressure is equal to 0
Term
describe the sequence of events for expiration.
Definition
1. inspiratory muscles relax 2. thoracic cavity volume decreases, 3. elastic lungs recoil passively; intrapulmonary volume decreases, 4. intrapulmonary pressure rises, 5. air flows out of lungs down its pressure gradient until intrapulmonary pressure is 0
Term
what is the major non-elastic source of resistance to airflow?
Definition
friction
Term
what is the relationship between flow, pressure, and resistance?
Definition
F= delta P/ R
Supporting users have an ad free experience!