The Effect of Threshold Inspiratory Muscle Training Device and Incentive Spirometry Device for Dyspnoea among Third-Trimester Antenatal Women

Abstract

Background: During pregnancy, the progesterone hormone causes the respiratory system to increase oxygen
consumption. Maternal hyperventilation causes the partial pressure of oxygen to increase and partial pressure of
carbon-dioxide to decrease. During the third trimester, the compression of the diaphragm in the lower base of the
lungs, which causes dyspnoea.
Purpose: The purpose of the study to find the prevalence and to evaluate the effect of threshold inspiratory muscle
training device and incentive spirometry device for dyspnoea among third- trimester antenatal women using
modified borg dyspnoea and dyspnea-12 questionnaire.
Materials and Methods: The study analysed prevalence of dyspnoea in third-trimester antenatal women from
December 2022 to April 2023 using the dyspnea-12 questionnaire. Out of 77 participants, 15 subjects were excluded
due to improper follow-up, lack of participation, and withdrawal from the study. In phase 2, in May 2023, 62
participants were divided into two groups: 31 antenatal women underwent threshold inspiratory muscle training
along with diaphragmatic breathing exercises, and 31 underwent incentive spirometry along with diaphragmatic
breathing exercises.
Result: Statistically significant differences between the two devices were evaluated by post-values of 13.80 ± 23.20;
and the P value is < 0.0001. These values were considered to be extremely statistically significant.
Conclusion: Threshold inspiratory muscle training device is more effective than Incentive Spirometry device for
dyspnoea among third-trimester antenatal women.