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75 Cards in this Set

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what is the maximum # of FVC attemts before you should give up?
8
IF the % predicted for FEV1/FVC is 88% to 90% or higher, then the patient has a/an ____ lung disease.
restricted
IF the % predicted for FEV1/FVC is 69% or lower, then the patient has a/an ____ lung disease.
obstructed
When performing a SVC maneuver, the subjuect must be free from any acute illness for at least the past ___ weeks.
3
Name 3 things that PFTing evaluates.
lung size, flow rates and diffusion of gasses.
Name 4 things that PFTing provides information on.
ventilaory defects, degree of lung impairment, effectivness of therapy and effects on gas exchange.
nomograms (patient variables) are usesd to determine...
predicted normals in PFTing
what is the most important factor in a nomogram?
height
list 7 factors in a nomogram.
height, gender, age, race, enviroment(altitude), quality of coaching, patient's clinical state.
what is the total lung copacity of a healthy young male?
6.0L
What is diffusing capacity used to determine?
the rate of gas transfer across the alveolar capillary membrane.
name 3 ways to indirectly measure the residual volume.
closed-circuit helium dilution test, open-circut nitrogen washout test, body plethysmography
how often should equipment be calibrated?
daily
equipment should be calibrated to within +/- ___%
3 or 50ml, which ever is greater.
a 3 liter super syringe has a maximum error of +/- __ml
90.
range of 2.91 to 3.09
what does ATPS stand for?
ambient temp, pressure saturation
what does BTPS stand for?
body temp, pressure saturation
Charles Law
pressure is constant and volume and temp are directly proportional
When measuring MVV, volumes should be...
greater than VT but less than VC
When measuring MVV, how many maneuvers should be done?
2
When measuring MVV, the two maneuvers should be within __% of each other.
10%
to check validity of MVV, compare it to FEV1. You do this by multipling FEV1 by __.
35
When viewing the results of a F-V loop you should be looking a picture of what?
3 acceptable loops, superimposed
In an acceptable FVC the best test is...
the maneuver with the largest summ of FVC and FEV1.
When doing a FVC which FEF 25%-75% do you use?
the one taken from the best test.
when doing a FVC, which FVC and FEV do you report?
the largest
what are the expiratory maneuver findings for a person with obstructive disease?
decreased FVC, FEV1,FEF 25%-75%, PEFR, MVV, FEF50%, FEV1%
what are the expiratory maneuver findings for a person with restrictive disease?
decreased or normal FVC, FEV1,FEF 25%-75%,MVV. Normal PEFR, FEF50% and normal or increase FEV1%
what is the most common reson to measure lung volumes?
to assess severity of restrictive disease
peak expiratory flow (PEF) most measures large, med. or small airway function?
large
peak expiratory flow (PEF) is the maximum flow attained during...
FVC
how many maneuvers should be performed in a peak expiratory flow maneuver?
3
which PEF is reported in a expiratory flow maneuver?
the largest
Peak expiratory flow can be meausured from 2 sources...
F-V loop or with a portable peak flow meter
what is one common cause of a large airway obstruction?
tumor
describe how a MVV is preformed.
you breath in and out for 12 to 15 sec as deep and fast as possible
name 3 things that can cause poor MVV results
neurologic disease, muscle weakness, obstruction, poor patient effort
MVV my be narmal in patients with ___ disease.
restrictive
pre-post bronchodilator studies determine...
reversibility of airway obstruction
In pre-post bronchodilator studies reversibility is considered significantly in creased if...
greater than 12% and 200 ml for either FEV1 or FVC or changes in FEF 25%-75% of 20-30%
there should be a minimum intrerval of __ minutes between pre and post bronchodilator studies
15
in pre-post bronchodilator studies pateints may perform several tests including...
spirometry, lung volumes and diffusing capacity
what is a significant improvement in SGaw in a pre-post bronchodilator study?
35% increase
name 6 indications for spirometery
detect L. disease, extent of disease, effects of job exposure, effects of therapy, risk for sugery, evaluate disability
what is the most basic PFT?
vital capacity (VC)
vital capacity (VC) is also refered to as...
slow vital capacity (SVC)
the 2 subdivsions of vital capacity (VC) are
inspiratory capacity (IC) and Expiratory reserve volume (ERV)
in which disease (obstructive or restrictive) is airflow in to or out of the lungs reduced?
obstructive
which disease (obstructive or restrictive) shows reduced lung volumes?
restrictive
restrictive defect is ...
the inability to fully expand the lungs
reduced lung volumes and capactity gernerally indicat ____ disease
restrictive
elevated residual volume or tatal lung capacity can indicate ___ disease
obstructive
air trapping or hyperinflation can indicate ___ disease
obstructive
name 3 mechanical restrictive defects that can cause inability fullly expand the lungs
3rd trimester pregnancy, thoracic cage deformities, lung resection
Vital capacity (VC) is measured by having the patient...
inhale maximally then exhale slowly and completely.
decreased vital capacity can be caused ___ disease
restrictive or obstructive
name 4 pathologic conditions that can cause a loss of distensible lung tissue in restrictive disease
lung cancer, pneumonia, atelectasis, surgical removal of lung tissue
name 3 mechanical factors that may cause limited diaphragm movement
pregnancy, obesity, abdominal fluids
healthy pateints can exhale __% of FVC in one second
80%
name 4 criteria for acceptability of FVC maneuver
maximal effort, good start, 6 second exhalation, 3 acceptable maneuvers
in a normal adult, the % of total volume exhaled during FEV1 is
75%-85%
normal FEV1/FEV (FEV1%) for a healthy adult is
75%-85%
reduced FEV and FEV1/FEV ratio indicated ___ disease.
obstructive
reduced FEV1 and FVC with a normal or elevated FEV1/FVC indicates ___ disease
restrictive
another term for peak expiratory flow (PEF) is
FEFmax
FEFmax (peak expiratory flow PEF)is the...
highest flow measured during forced expiration
forced expiratory flow (FEF) 25%-75% is the ...
average expiratory flow rate over the middle 50% of the FVC
forced expiratory flow (FEF)25%-75% indicates status of what size airways?
medium and small
forced expiratory flow (FEF)25%-75% less than 65% of predidcted indicates ___ disease
obstructive
name some pathological conditions associated with restrictive lung disease
lung compression, atelectasis, pnemonia, fibrosis, and tumors
what lung volumes and capacityes cannot be measured directly by spiromety
residual volume (RV), functional resudual capacity(FRC) and TLC
name 3 ways to measure RV, FRV and TLC (the ones that cannot be measured directly by spirometry.)
closed circuit helim dilution, open circuit nitrogen washout and body plethysmography
what is the most significant factor in the SVC maneuver?
patient effort
how many acceptable maneuvers do you need for an acceptable VC?
2, volumes within 150ml
vital capacity without a forced effort is called..
slow vital capacity (SVC)