Assessment of Maximum Dynamic Inspiratory Pressure

Silva, Paulo Eugênio; Carvalho, Karina Livino de; Maldaner, Vinicius; Daniel, Carlos Raphael Araújo; Gomes‐Neto, Mansueto

doi:10.4187/respcare.06058

Cited by 25 publications

(28 citation statements)

References 26 publications

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“…24,25 Some factors, including anesthesia and surgery, have been associated with a decrease in this parameter. 26 IMT has been reported to serve as an option for minimizing these losses, 8,27,28,29 and our study corroborated this finding. Patients who received IMT had similar MIP values in the preoperative and postoperative periods of cardiac surgery.…”

Section: Discussionsupporting

confidence: 88%

“…Patients who received IMT had similar MIP values in the preoperative and postoperative periods of cardiac surgery. 8,28,29 Therefore, IMT may be an important strategy for minimizing respiratory muscle weakness due to cardiac surgery. 28 Hulzelbos et al 30 reported that maintaining or increasing respiratory muscle strength is important to reduce the effects of pulmonary complications and has even decreased the length of hospital stay.…”

Section: Discussionmentioning

confidence: 99%

“…The S-index can be measured using the POWERbreathe K-series® and is used to assess dynamic inspiratory muscle strength. 29 While MIP is obtained by maximal static inspiratory effort, the S-index is measured during a dynamic unobstructed inspiratory maneuver. Moreover, when MIP cannot be used to measure inspiratory muscle strength, the S-index appears to be a reliable alternative assessment.…”

Section: Discussionmentioning

confidence: 99%

“…11 However, no studies to date have provided reference ranges for this variable. Minahan et al 11,29 reported that S-index values could not be compared to MIP values obtained using respiratory pressure meters.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Inspiratory Muscle Training Using an Electronic Device on Patients Undergoing Cardiac Surgery: A Randomized Controlled Trial

Fortes

Marques

Oliveira

et al. 2020

International Journal of Cardiovascular Sciences

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Background: Cardiac surgery causes pathophysiological changes that favor the occurrence of pulmonary and functional complications.Objective: To investigate the effects of inspiratory muscle training (IMT) with an electronic device on patients undergoing cardiac surgery.Methods: A randomized controlled trial was conducted with 30 adult patients undergoing elective cardiac surgery. A control group (CG) received conventional physical therapy care, and an intervention group (IG) received IMT using the POWERbreathe K5® electronic device. Two daily sessions of physical therapy were performed at the intensive care unit and one daily session at the ward until the sixth postoperative day. The following variables were measured preoperatively and on the sixth postoperative day, in both groups: inspiratory muscle strength, dynamic inspiratory muscle strength, and peak inspiratory flow. Data distribution was evaluated by the Shapiro-Wilk test. Analysis of variance was used, and the results were considered statistically significant when p < 0.05.Results: Maximal inspiratory pressure (71.7 ± 17.1 cmH2O vs 63.3 ± 21.3 cmH2O; p = 0.11], S-index (52.61 ± 18.61 vs 51.08 ± 20.71), and peak inspiratory flow [(2.94 ± 1.09 vs 2.79 ± 1.26)] were maintained in the IG but had a significant reduction in the CG. Conclusion:IMT performed with an electronic device was effective at maintaining inspiratory muscle strength, dynamic inspiratory muscle strength, and peak inspiratory flow when compared to conventional physical therapy.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Inspiratory Muscle Training Using an Electronic Device on Patients Undergoing Cardiac Surgery: A Randomized Controlled Trial

Fortes

Marques

Oliveira

et al. 2020

International Journal of Cardiovascular Sciences

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“…Silva et al 27 evaluated the S-Index of 81 healthy adults, obtaining a mean of 102 cmH 2 O. These values are higher than the mean obtained in our study with healthy children and adolescents, with a mean value of 87.10 cmH 2 O.…”

Section: Discussioncontrasting

confidence: 77%

Static and dynamic evaluation of respiratory muscle strength in asthmatic children and adolescents

Cordeiro

Silva

Britto

et al. 2020

Rev. Bras. Saude Mater. Infant.

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Objectives: to evaluate static and dynamic respiratory muscle strength in children and adolescents with asthma. Methods: cross-sectional study, involving 80 children and adolescents, 40 with asthma and 40 healthy controls. Biological and clinical characteristics were analyzed. The analysis of the dynamic inspiratory muscle strength was obtained using the KH5 device of the POWERbreathe® line, while the static evaluation was performed using an analog manova-cuometer. Results: the mean obtained from the S-Index was higher in the control group compared to asthmatics (p = 0.026). There was no statistical difference between MIP values for asthmatics and predicted values (p = 0.056). The MEP results showed a significant difference between the mean of the cases and the predicted values (p = 0.000). There was a positive correlation between height and S-Index (p = 0.002 and r = 0.438). Conclusion: the present study demonstrated that the static inspiratory muscle strength (PImáx) of children and adolescents with asthma in comparison with the values predicted in the literature does not differ, however, when submitted to dynamic assessment (S-Index), it presents higher values in healthy controls. In addition, the S-Index showed a positive correlation with the child's height.

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The Effects of Respiratory Muscle Training on Resting‐State Brain Activity and Thoracic Mobility in Healthy Subjects: A Randomized Controlled Trial

Vardar-Yağlı

Sağlam

Dasgin

et al. 2022

Magnetic Resonance Imaging

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Background: Although inspiratory muscle training (IMT) is an effective intervention for improving breath perception, brain mechanisms have not been studied yet. Purpose: To examine the effects of IMT on insula and default mode network (DMN) using resting-state functional MRI (RS-fMRI). Study Type: Prospective. Population: A total of 26 healthy participants were randomly assigned to two groups as IMT group (n = 14) and sham IMT groups (n = 12). Field Strength/Sequence: A 3-T, three-dimensional T2* gradient-echo echo planar imaging sequence for RS-fMRI was obtained. Assessment: The intervention group received IMT at 60% and sham group received at 15% of maximal inspiratory pressure (MIP) for 8 weeks. Pulmonary and respiratory muscle function, and breathing patterns were measured. Groups underwent RS-fMRI before and after the treatment. Statistical Tests: Statistical tests were two-tailed P < 0.05 was considered statistically significant. Student's t test was used to compare the groups. One-sample t-test for each group was used to reveal pattern of functional connectivity. A statistical threshold of P < 0.001 uncorrected value was set at voxel level. We used False discovery rate (FDR)-corrected P < 0.05 cluster level. Results: The IMT group showed more prominent alterations in insula and DMN connectivity than sham group. The MIP was significantly different after IMT. Respiratory rate (P = 0.344), inspiratory time (P = 0.222), expiratory time (P = 1.000), and inspiratory time/total breath time (P = 0.572) of respiratory patterns showed no significant change after IMT. All DMN components showed decreased, while insula showed increased activation significantly. Data Conclusion: Differences in brain activity and connectivity may reflect improved ventilatory perception with IMT with a possible role in regulating breathing pattern by processing interoceptive signals.Evidence Level: 2 Technical Efficacy: Stage 4

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Assessment of Maximum Dynamic Inspiratory Pressure

Abstract: Eight maneuvers were necessary to reach maximum and reliable values of the S-Index preceding inspiratory muscle warm-up or sham. Moreover, inspiratory muscle warm-up preceding S-Index assessment improved inspiratory muscle performance.

Cited by 25 publications

References 26 publications

Effects of Inspiratory Muscle Training Using an Electronic Device on Patients Undergoing Cardiac Surgery: A Randomized Controlled Trial

Effects of Inspiratory Muscle Training Using an Electronic Device on Patients Undergoing Cardiac Surgery: A Randomized Controlled Trial

Static and dynamic evaluation of respiratory muscle strength in asthmatic children and adolescents

The Effects of Respiratory Muscle Training on Resting‐State Brain Activity and Thoracic Mobility in Healthy Subjects: A Randomized Controlled Trial

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