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Maximal Inspiratory Pressure: Test-Retest Reliability
Performance did not technically plateau, but systematic differences between Pimax measured at the third and fourth test sessions were very small; hence, data from these sessions were examined for test-retest reliability. The mean absolute difference, cumulative frequency distribution for the absolute difference, and the 95 percent confidence interval for the absolute difference indicated that Pimax […]
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Maximal Inspiratory Pressure: Discussion
The mean Pimax was consistent with values reported for similar groups of patients with moderate to severe COPD. The results of this study supported the notion that in naive COPD patients, performance of Pimax improves with practice of the Pimax maneuver. The third and fourth test of Pimax produced reliable data. Learning Effect Systematic differences […]
Maximal Inspiratory Pressure: Results
The sample was 69 men and 22 women with moderate to severe COPD (Table 1). Most patients were taking standard pharmacologic therapies, including inhaled p-agonists, oral (3-agonists, and methylxan-thines. Nine were using home oxygen. Ten were currently smoking, one had never smoked, and the remainder had quit smoking. The sample was middle class as indicated […]
Maximal Inspiratory Pressure: Data Analysis
The Pimax was defined as the largest negative pressure generated at the mouth and maintained for at least 1 full second. A minimum of five technically satisfactory trials were conducted for each test and data w^ere discarded if there was an air leak around the mouthpiece or if the pressure was held for less than […]
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Maximal Inspiratory Pressure: Method
Maximal inspiratory pressure (Pimax) is commonly used to measure inspiratory muscle strength. It reflects the force-generating ability of the combined inspiratory muscles during a brief quasi-static contraction. The Pimax test is simple to perform and usually measured during a single test session with several trials. However, reliability has not been fully addressed in the research […]