Instructions for Use
CPET
page 12
Version: 4 | Release date: 01 April 2022
3
Operation
3.1
CPET
Information on indication, contraindication and side effects can
be found in the IFU of the device with which the examination is
performed.
CPET is the determination of physical performance by measuring
gas metabolism. The interaction of heart, circulation, breathing
and metabolism is analysed during defined physical exercise.
The test person is exposed to an increasing load on an
ergometer until exhaustion. Heart rate, respiratory rate, minute
ventilation, oxygen uptake and carbon dioxide output are
continuously recorded.
Both the measured values achieved under maximum load (e.g.
VO
2
max) and the development of the individual parameters
under load (especially at the thresholds VT1 and VT
2
) provide
information about the exercise tolerance of the cardio-respiratory
system and allow differential diagnostics.
For this purpose, a large number of parameters are calculated
from the recorded measurement data, which indicate a disease
in the case of deviations from the normal course, whereby the
transitions can be fluid:
Restrictions on ventilation (e.g. obstructive pulmonary disease,
restrictive pulmonary disease).
•
VE (minute ventilation)
•
Vt (tidal volume)
•
Bf (respiratory rate)
Cardio-circulatory restrictions (e.g. heart failure, heart defects)
•
HR (heart rate)
•
O
2
pulse (oxygen pulse)
•
VO
2
(oxygen uptake)
•
VCO
2
(carbon dioxide output)