Abstract：
STUDY DESIGN:The study is conducted on the basis of comparative-repeated measures. OBJECTIVES:The objective of this study is to assess the reliability of non-invasive cardiac output (CO) measurements in individuals with tetraplegia (TP) at rest and during exercise using Innocor, and to test the hypothesis that CO measurements are less reliable in TP than in able-bodied (AB) individuals. SETTING:Ambulatory volunteers, Switzerland. METHODS:Nine male motor-complete TP (C5-C7) and nine pair-matched AB performed repeated CO measurements at rest and during submaximal arm-crank and wheelchair exercises in four different test sessions. Within- and between-day reliabilities were compared between TP and AB. RESULTS:Mean differences between measurements at rest (TP vs AB, within-day: 0.1±0.5 vs 0.2±0.6 l min(-1), between-day: -0.7±0.6 vs -0.1±0.8 l min(-1)), during arm-crank (TP vs AB, within-day: 0.1±0.9 vs 0.5±0.7 l min(-1), between-day: -0.3±1.1 vs 0.0±1.1 l min(-1)) and wheelchair exercises (TP vs AB, within-day: 0.3±1.2 vs -0.1±0.8 l min(-1), between-day: 0.1±1.1 vs 0.5±0.9 l min(-1)) were not significantly different between TP and AB (all P>0.05). Coefficients of variation in TP (within-day, rest: 6.8%, arm-crank: 9.6% and wheelchair: 10.8%; between-day, rest: 11.9%, arm-crank: 11.2% and wheelchair: 10.3%) and in AB (within-day, rest: 7.7%, arm crank: 6.8% and wheelchair: 6.0%; between-day, rest: 9.2%, arm crank: 8.5% and wheelchair: 8.0%) indicated acceptable reliability. CONCLUSION:In contrast to our hypothesis, we found non-invasive CO measurements using Innocor to be as reliable in TP as they are in AB. Consequently, Innocor can be recommended for repeated assessments of CO in TP within routine diagnostics or for evaluation of training progress.
journal_name
Spinal Cordjournal_title
Spinal cordauthors
Hostettler S,Brechbühl J,Leuthold L,Mueller G,Illi SK,Spengler CMdoi
10.1038/sc.2010.173subject
Has Abstractpub_date
2011-05-01 00:00:00pages
665-71issue
5eissn
1362-4393issn
1476-5624pii
sc2010173journal_volume
49pub_type
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