Effects of preoperative inspiratory muscle training in obese women undergoing open bariatric surgery: respiratory muscle strength, lung volumes, and diaphragmatic excursion

Marcela Cangussu Barbalho-Moulim, Gustavo Peixoto Soares Miguel, Eli Maria Pazzianotto Forti, Flavio do Amaral Campos, Dirceu Costa, Marcela Cangussu Barbalho-Moulim, Gustavo Peixoto Soares Miguel, Eli Maria Pazzianotto Forti, Flavio do Amaral Campos, Dirceu Costa

Abstract

Objective: To determine whether preoperative inspiratory muscle training is able to attenuate the impact of surgical trauma on the respiratory muscle strength, in the lung volumes, and diaphragmatic excursion in obese women undergoing open bariatric surgery.

Design: Randomized controlled trial.

Setting: Meridional Hospital, Cariacica/ES, Brazil.

Subjects: Thirty-two obese women undergoing elective open bariatric surgery were randomly assigned to receive preoperative inspiratory muscle training (inspiratory muscle training group) or usual care (control group).

Main measures: Respiratory muscle strength (maximal static respiratory pressure--maximal inspiratory pressure and maximal expiratory pressure), lung volumes, and diaphragmatic excursion.

Results: After training, there was a significant increase only in the maximal inspiratory pressure in the inspiratory muscle training group. The maximal expiratory pressure, the lung volumes and the diaphragmatic excursion did not show any significant change with training. In the postoperative period there was a significant decrease in maximal inspiratory pressure in both the groups. However, there was a decrease of 28% in the inspiratory muscle training group, whereas it was 47% in the control group. The decrease in maximal expiratory pressure and in lung volumes in the postoperative period was similar between the groups. There was a significant reduction in the measures of diaphragmatic excursion in both the groups.

Conclusion: The preoperative inspiratory muscle training increased the inspiratory muscle strength (maximal inspiratory pressure) and attenuated the negative postoperative effects of open bariatric surgery in obese women for this variable, though not influencing the lung volumes and the diaphragmatic excursion.

Conflict of interest statement

No potential conflict of interest was reported.

Figures

Figure 1
Figure 1
Flowchart of the study participants.
Figure 2
Figure 2
MIP evaluations of T1, T2, and T3 in IMT ((n = 15) and control (n = 17) groups. *Difference between IMT and Control groups (T2), p<0.05. (values expressed as mean)”.
Figure 3
Figure 3
MEP evaluations of T1, T2, and T3 in IMT (n = 15) and Control (n = 17) groups. (values expressed as mean).

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