Validation of a protocol to evaluate maximal expiratory pressure using a pressure transducer and a signal conditioner

Abstract

The respiratory muscles can present fatigue and even chronic inability to generate force. So, reliable devices are necessary to their evaluation. The aim of this study is to evaluate the MEP (Maximal Expiratory Pressure) values of individuals between 20 and 25 years old and to validate a protocol using a pressure transducer and a signal conditioner comparing it with the digital manometer. We evaluated the MEP of 10 participants. They remained seated and made six respiratory maneuvers from Total Lung Capacity (TLC) to Residual Volume (RV). The results in the study showed no statistically significant differences when compared to values reported in the literature, and that the pressure transducer provides reliable values for MEP.

Use of the correlation coefficient in agricultural sciences: problems, pitfalls and how to deal with them

“…It is therefore a very popular tool for analysing data that arise in many scientific disciplines, for instance biology (e.g., Soares et al 2011, Juliá and Peris 2010, Camargo et al 2011, biomedical and medical sciences (e.g., Camacho et al 2010, Oliboni et al 2011, earth sciences (e.g., Fontana et al 2010, Rangel et al 2011, social sciences (e.g., Conte et al 2011), economics (e.g., Misztal 2011), ergonomics (e.g., Bin andRichardson 2010, Zadry et al 2011), and of course agriculture (e.g., Chełkowski et al 2000, Cheng et al 2010, Lakhesar et al 2010, Bandehagh and Hossein Zadeh Moghbeli 2011, Cherati et al 2011, Heidari Zooleh et al 2011, Herrero et al 2011, Kesavacharyulu et al 2011, Rogiers et al 2011.…”

Statistical Analysis: Marine Capture Production of West Bengal, Andhra Pradesh and Kerala

“…Pearson's correlation coefficient is a statistical method of quantifying the association, or "coherence", between two variables. It is therefore a very popular tool for analyzing data that arise in many scientific disciplines, for instance biology (Soares et al, 2011;Julia et al, 2010). In this study, the relationship between major marine capture production (Pelagic, Demersal, Crustaceans and Molluscs) and three costal states (West Bengal, Andhra Pradesh and Kerala) of India were analyzed over the period 1985-2011 using correlation analysis with the null hypothesis (H o ) that there was no statistical significant correlation between the marine capture production groups which were computed among coastal states of India.…”