Respiratory care
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Multicenter Study
Reference Values for the 6-min Walk Distance (6MWT) in Healthy Children Aged 7 to 12 Years in Brazil: Main Results of the TC6minBRASIL Multi-Center Study.
Brazil is a country with great climatic, socioeconomic, and cultural differences that does not yet have a reference value for the 6-min walk test (6MWT) in healthy children. To avoid misinterpretation, the use of equations to predict the maximum walk distance should be established in each country. ⋯ Reference values were established for the 6MWT in healthy children aged 7-12 y in Brazil.
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Oxygen cylinders are widely used both in hospital and prehospital care. Excessive or inappropriate FIO2 may be critical for patients with hypercapnia or hypoxia. Moreover, over-oxygenation could be deleterious in ischemic disorders. Supplemental oxygen from oxygen cylinder should therefore be delivered accurately. The aim of this study was to assess the accuracy of oxygen flows for oxygen cylinder in hospital and prehospital care. ⋯ This study shows good accuracy of oxygen flow delivered via oxygen cylinders. This accuracy was higher with dual stage. Single stage was also accurate, however, at low flow this accuracy is slightly less. Moreover, with single stage, when residual pressure decreases, the median value of delivered flow decreased.
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Comparative Study
Incremental Shuttle Walk Test to Assess and Prescribe Exercise for Subjects With Bronchiectasis: Hallway Versus Treadmill.
The incremental shuttle walk test was initially developed to be carried out in a hallway (ISWT-H) but has been modified to be performed on a treadmill (ISWT-T). However, it is still unknown whether performance on ISWT-H and ISWT-T are similar in patients with bronchiectasis. In this study, we compared the performance, physiological responses, and perception of effort between the ISWT-T with a handrail and ISWT-H for subjects with bronchiectasis. We also sought to estimate and compare the prescription for training intensity with both tests. ⋯ The ISWT-T with handrail and the ISWT-H are not interchangeable in subjects with bronchiectasis. A slower speed of training intensity may occur when the test is performed in a hallway, as originally described, and this may underestimate responses to aerobic training.
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Exercise training is an effective and low-cost tool for COPD rehabilitation. Thus, validating a non-exhaustive method to determine a patient's anaerobic threshold would be a very interesting tool in practical settings. We aimed to test the reproducibility of critical velocity values determined in a non-exhaustive manner (CVNE) and tolerance for exercise performed at this physiological marker in subjects with COPD. ⋯ Although most of the subjects presented good tolerance for exercise at CVNE, fair levels of reproducibility were observed in subjects with COPD, even using lactate. Thus, the use of CVNE determined through double 3-min efforts should be considered with caution.
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Compressor/nebulizer units are used to deliver inhaled medications to patients with cystic fibrosis. Practitioners and parents frequently replace either the compressor or the nebulizer with a similar component from a different brand. We hypothesized that these changes could affect the compressor/nebulizer flow-pressure and aerosol characteristics. ⋯ Our findings indicate that, in general, replacing the nebulizer or compressor with a different brand changes the flow-pressure and aerosol characteristics. Practitioners should be cautious when changing compressor/nebulizer pairs unless they are aware of the resulting impact on the flow-pressure and aerosol characteristics.