cardio pulmonary exercise testing Flashcards
whats CPET stand for
cardiopulmonary exercise testing
whats CPET
global assessment of exercise response in pulmonary, vardivalsult , nearo and skeletal systems
indicated for CPET
determine causes of dyspnea, chest pain, exercise inteolerance
exercise prescription (training intensities)
evaluate functional impairment
evaluate effectiveness of therapy
determine disease severity/ prognosis
pre op eval
assessment of disability for workers compensation
can occupation demands be safely met
T?F resting measurements always support physiological capacity
false, not always
components of effective CPEt protocol
large mm exercises
measure pulmonary gas exchange from rest to peak
fixed increments in work rate (magnitude and duration) to peak
6-20 mins
measure symptom intensity
post exercise questioning
recommended CPET exercise machines
bikes treadmill , arm ergomerty if needed, sport specific
Bike vs treadmille vo2 max safety leg fatigue quantifying work rate blood gas measure blood pressure measure noise artificant weight bearing
vo2 max - lower safety - safer leg fatigue - more quantifying work rate: yes blood gas measure: easy blood pressure measure: easy noise artificant: less weight bearing: less
how to determine work rate increase
jones approach
jones approach
standardized increments (10 watts in diseased, 25 in norm)
1-2 min stages
total test aimed 10-20 min
symptoms to measure
breathing discomfort
mm fatigue
chest / mm pain
most common reason for stopping exercise
dyspnea
Dyspnea in COPD Grades
1 - can't breath when exerting 2 - breathless when hurrying / hil 3 - have to go slower than most 4- need to stop to breath after 100yds 5- too breathless to leave home
reasons for stopping exercise example questions
dynpnea
leg fatigue
combination
measurements during CPET
external work metabolic gas exchange cardiovascular ventilatory pulmonary gas ex symptoms
how to measure external work
work rate
measuring metabolic gas exchange
v02
RER
Lactate
measuring cardiovascular
HR, ECG, BP, 02 pulse
measuring ventilatory
Ve (minute ventilation)
tidal volume
Pulmonary Gas exchange measurement
Spo02
Sa02
symptoms that you are measuring
dyspnea
fatigue
chest pain
what values are considered evidence of reduced exercise capacity
<80-85%
when is peak v02
clear plateau of vo2
or estimated if listed
reduced v02 peak is problems o f?
02 transport / extraction pulmonary limits neuro limits mm limits effort
measure Q by
HRx stroke volume
02 extraction determined by
02 carrying capacity, mm 02 extraction
02 carrying capacity effected by
hemoglobin concentration
pa02
02 dissociation curve (affinity)
mm 02 extraction effected by
cap density
mitochondrial density
tissue perfusion
fick equation
Q x 02 extraction