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      • HARVEST
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      Assessing the use of the steep ramp test in chronic obstructive pulmonary disease

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      RChuraThesis.pdf (1.392Mb)
      Date
      2009-07
      Author
      Chura, Robyn Lorraine
      Type
      Thesis
      Degree Level
      Masters
      Metadata
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      Abstract
      The purpose of this study was to compare power output and ventilatory measurements between the steep ramp test (SR) and both the 30-second Wingate anaerobic (WAT) and standard cardiopulmonary exercise tests (CPET) in chronic obstructive pulmonary disease (COPD). 11 patients (7 males and 4 females) underwent spirometry, a CPET, WAT and SR test. Repeated measures ANOVA was used to compare the differences between the peak work rate of the CPET (CPETpeak), SR (SRpeak), and the average power of the WAT (Wavg). The Wavg was higher than the SRpeak, which was higher than the CPET (231.2 ± 113.4, 156.8 ± 67.9, 65.9 ± 35.9, p>0.05 respectively). There were no differences found between the tests at end-exercise for inspiratory reserve volume (IRV), ventilation (VE), and end-expiratory lung volume (EELV). Tidal volume (VT) was also compared between the tests as a percentage of the inspiratory capacity (IC) remaining at end-exercise and no differences were found. The similarity between the ventilatory measures indicates a similar level of constraint, despite the large difference in work rates achieved, in all 3 tests. This shows that a standard CPET underestimates leg power in COPD patients, and the WAT and SR may be better indicators of leg muscle power and anaerobic type exercise.
      Degree
      Master of Science (M.Sc.)
      Department
      Medicine
      Program
      Medicine
      Supervisor
      Marciniuk, Darcy; Butcher, Scott
      Committee
      Cockcroft, Don; Busch, Angela; Sheppard, Suzanne; West, Nigel; Farthing, Jon
      Copyright Date
      July 2009
      URI
      http://hdl.handle.net/10388/etd-08242009-151129
      Subject
      ventilation
      anaerobic
      obstructive lung disease
      graded exercise test
      maximal exercise
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