Determination of equations of the reference values for the state of São Paulo population in test of incremental respiratory endurance (TIRE)

Abstract

Aim: The main objective of this study was to develop normal values for PImax (maximal inspiratory pressure), PImaxS (sustained maximum inspiratory pressure) in Jaules (J) and units of time pressure (upt) and time of inspiration durantion (Tdi) by the TIRE.

Methods: 120 volunteers from the Brazilian population were studied, with no obstructive, restrictive or mixed ventilatory alterations demonstrated by previous spirometry, from 20 to 80 years old, 10 men and 10 women each decade. A prospective study of measurement of PImax, PImaxS and Tdi, using the RT2 device (DeVilbiss Healthcare Ltda.). In addition to previous spirometry and analogue manovacuometry.

Results: The following equations were created: For PImax - Men and Women (Weight x 0.46) + (Gender x 23.63) + 72.20; Men (Weight x 0.59) - (Age x 1.20) + 95.93; Women (Height x 85.86) - (Age x 0.66) - 51.06; For PImaxS (J) - Men + Women (Height x 25.34) + (Gender x 3.50) - (Age x 0.06) - 32.90; Men (Height x 46.14) - 68.40; Women (Height x 16.21) - 21.19; PImaxS (upt) - Men + Women (Height x 1032.20) + (Gender x86.90) - 1410.60; Men (Height x 1457.00) - 2060.50; Women (Height x 595.80) - 711.90; Tdi (s) - Men + Women (Height x 11.00) - 9.50; Men (Height x 12.11) - 11.50; Women (Height x 14.90) - 15.80.

Conclusion: The results of this study allowed us to form equations for the IMR (muscular inspiratory force) and EMR (Respiratory Muscle Endurance) normal values for individuals of the Brazilian population, allowing an improvement in the evaluation of strength and, especially, endurance of respiratory muscles in different clinical situations.