VENTILATION AND GAS EXCHANGE LAB
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27 Terms
VENTILATION
the process of moving gas in and out of the lungs
RESPIRATION
the physilogy process of using oxygen by the tissues at the cellular level
DIAPHRAGM
responsible for about 75% of respiration
3 TYPES OF INTERCOSTAL MUSCLES
EXTERNAL INTERCOSTAL MUSCLES
INTERNAL INTERCOSTAL MUSCLES
INNERMOST INTERCOSTAL MUSCLES
EXTERNAL INTECOSTAL MUSCLES
it contracts during inhalation and relax during expiration
INTERNAL INTERCOSTAL RESPIRATION
it relax during inhalation and contract during exhalation
INNERMOST INTERCOSTAL MUSCLE
assist in the deppression of ribs during forced expiration
MEASUREABLE PRESSURE USED IN DESCRIBING RESPIRATORY SYSTEM MECHANICS
PAO
Ppl
PA
PBS
PRESSURE AIRWAY OPENING OR (PAO)
pressured measured at the opening of the respiratory system airway
PLEURAL PRESSURE (Ppl)
pressure measured in the pleural space
ALVEOLAR PRESSURE
pressure in the alveolar (gas space) region of the lungs
BODY SURFACE PRESSURE (PBS)
pressure measured at the body surface
PRESSURE DIFFERENCES USED IN DESCRIBING RESPIRATORY SYSTEM MECHANICS
PTR
PTAW
PTA
PTCW
PTP
TRANRESPIRATORY PRESSURE
respiratory system is everything that exists between the pressure measured at the airway opening and the pressure measured at the body surface
TRANSAIRWAY PRESSURE
represents all the airways (physiological and artificial)
PTR
PAO - PBS
PTAW
PAO - PA
TRANSALVEOLAR PRESSURE
alveolar region is whatever exists between pressure measured in the pleural space and the pressure on the body surface.
TRANS-CHESTWALL PRESSURE
pressure across the chestwall is the difference between the pressure measured in the pleural space and the pressure on the body
TRANSPULOMONARY PRESSURE
one of the most usedful combinations bundles together the airways and the alveolar region to assess the whole pulmonary system
PTA
PA - Ppl
PTCW
Ppl - PBS
PTP
PAO - Ppl
SURFACE TENSION
force exerted by water molecules on the surface of the lung tissue as those water molecules pull together.
SURFACTANT
is any substance that reduces surface tension
essential for LUNG FUNCTION
LUNG COMPLIANCE
caused by the tissue elastic forces and surface tension that oppose lung inflation
COMPLIANCE
defined as the ratio between volume and pressure in an elastic system
usually expressed in UNITS of mL/cm H20