CPET

Question 1

what are the indications of CPET?

Answer 1

determining causes of dyspnea, chest pain, exercise intolerance
exercise prescription
evaluate for the level of functional impairment
evaluating effectiveness of therapy
determine disease severity and prognosis in patients with CV/respiratory disease
preoperative evaluation
assessing functional capacity before hospital discharge
assessment of disability for workers compensation
deciding if occupational demands can be safely met

Question 2

components of an effective CPET protocol

Answer 2

large muscle mass
metabolic, CV, ventilatory and pulmonary gas exchange 
fixed increments of work rate 
6-20 mins
measure symptom intensity 
post exercise questioning

Question 3

describe Jones approach

Answer 3

10 watts increments 4 disease
25 watts increments for health
1-2 min stages

10-25 min total

Question 4

Fick Equation

Answer 4

VO2= COx arterial-mixed venous O2 content difference

Question 5

what affects O2 carrying capacity of arterial blood :

Answer 5

Hb concentration
partial pressure of O2
affinity of Hb for O2

Question 6

what affects O2 utilization/extraction

Answer 6

capillary density
mitochondrial density and function
tissue perfusion and diffusion