51971
document
[ Methodologic comparison of the polyfrequency oscillation method , transcutaneous oxygen pressure measurement and body plethysmography in bronchial provocation with methacholine ] . A bronchial provocation challenge test was conducted with 30 subjects using metacholin . In randomised sequence lung function analysis tests were carried out with the bodyplethysmograph ( Raw , FEV1 ) and the polyfrequent oscillation method ( resistance , reactance between 2 and 52 Hz ) , whereas the transcutaneous oxygen pressure ( tc-PO2 ) was measured continuously . Correlations between the various parameters , the change of the values at PD60 sGaw in relation to the initial values , the interindividual variability and the reactivity were determined . Medium correlations were found for the oscillatory parameters and Raw , whereas for tc-PO2 and Raw the correlation was markedly lower . In terms of percentage the greatest change was found in reactance , in relation to the initial value , followed by Raw and FEV1 . The interindividual variability resulted in the highest values for the reactance , followed by Raw and FEV1 . Interindividual variability showed the highest values for the reactance before oscillatory resistance and Raw . In respect of reactivity , reactance also had the highest values . Overall evaluation showed that bodyplethysmography and the polyfrequent oscillation method ( reactance or resonance frequency ) are comparably sensitive .
51972
Intervention_Physical
polyfrequency oscillation method
51973
Intervention_Pharmacological
methacholine
51974
Intervention_Pharmacological
metacholin
51975
Intervention_Physical
bodyplethysmograph
51976
Intervention_Pharmacological
transcutaneous oxygen pressure
51977
Intervention_Physical
bodyplethysmography
51978
Intervention_Physical
polyfrequent oscillation method
51979
Outcome_Physical
oscillatory parameters and Raw
51980
Outcome_Physical
tc-PO2 and Raw
51981
Outcome_Other
greatest change
51982
Outcome_Physical
Raw and FEV1 .
51983
Outcome_Other
highest values
51984
Outcome_Physical
Raw
51985
Outcome_Physical
FEV1 .
51986
Outcome_Other
variability
51987
Outcome_Physical
oscillatory resistance and Raw .
51988
Outcome_Physical
reactance
51989
Participant_Sample-size
30
51990
Participant_Condition
subjects