Introduction The use of noninvasive positive-pressure mechanical ventilation (NPPV) has been investigated in several acute respiratory failure situations. Questions remain about its benefits when used in weaning patients from invasive mechanical ventilation (IMV). The objective of this study was to evaluate the use of bi-level NPPV for patients who fail weaning from IMV.
[Purpose] To evaluate pre-extubation variables and check the discriminative validity of
age as well as its correlation with weaning failure in elderly patients. [Subjects and
Methods] Two hundred thirty-nine consecutive patients (48% female) who were on mechanical
ventilation and had undergone orotracheal intubation were divided into four subgroups
according to their age: <59 years, 60–69 years, 70–79 years, and >80 years old. The
expiratory volume (VE), respiratory frequency (f), tidal volume
(VT), and respiratory frequency/tidal volume ratio (f/VT) were used
to examine differences in weaning parameters between the four subgroups, and age was
correlated with weaning failure. [Results] The rate of weaning failure was 27.8% in
patients aged >80 years and 22.1% in patients aged <60 years old. Elderly patients
presented higher f/VT and f values and lower VT values. The areas
under the receiver operating characteristic curves for f/VT ratio were smaller
than those published previously. [Conclusion] Our results indicate that aging influences
weaning criteria without causing an increase in weaning failure.
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