Effect of strengthening the inspiratory muscles in patients after cardiac surgery

Not Applicable

• Conditions: Muscle weakness; Postoperative complications; C23.550

• Registration Number: RBR-942kk6s
• Lead Sponsor: Faculdade de Medicina do ABC

Brief Summary

Pulmonary complications are usually seen in patients undergoing cardiac surgery. The use of cardiopulmonary bypass, sternotomy, and pleural drains are linked to these complications. There is pulmonary dysfunction, loss of respiratory muscle strength, as well as a reduction in the values ??of maximum inspiratory pressure and maximum expiratory pressure. Inspiratory muscle weakness during this period causes serious complications such as retention of pulmonary secretions, pneumonia, atelectasis, respiratory failure, and hypoxia, among others. Inspiratory muscle training is used to gain maximum inspiratory pressure, this parameter reflects the inspiratory muscle strength. Thus, further investigation of the resources currently available to reverse this situation is essential. The objective of the present study was to evaluate the effect of inspiratory muscle training using Powerbreathe® and to measure inspiratory muscle strength, manuvacuometry was used in patients undergoing elective cardiac surgery of elective myocardial revascularization via sternotomy and with the use of cardiopulmonary bypass at the Hospital do Coração do Cariri in the city of Barbalha, state of Ceará in Brazil, using the Powerbreathe® about the increment of maximum inspiratory pressure. The intervention group received inspiratory muscle training with Powerbreathe® and the conventional physiotherapeutic protocol in the postoperative period of the aforementioned heart surgery, and the control group received the latter protocol and did not receive inspiratory muscle training with Powerbreathe®. This study was experimental, of the prospective clinical trial type, with two arms, which had its sample chosen by lot, its population was drawn into one of two groups: the intervention group had 21 patients and the control group had 19 patients. The intervention group showed a statistically significant increase in the values ??of maximum inspiratory pressure when comparing the moments: first postoperative day and fifth postoperative day. There was a significant increase in maximum inspiratory pressure from the first to the fifth postoperative day, which reflects the increase in inspiratory muscle strength. The findings of this study allow us to state that the use of inspiratory muscle training with the use of POWERBreathe® in the postoperative period of cardiac surgery for myocardial revascularization with cardiopulmonary bypass increases inspiratory muscle strength.

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Completion: 2018-12-20
• Study Start: 2023-07-04
• Last Update Posted: 26 July 2023

Recruitment & Eligibility

• Status: Data analysis completed
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

Patients in the postoperative period of elective cardiac surgery via sternotomy and using cardiopulmonary bypass; left ventricular ejection fraction above 40%; body mass index lower than 30 kg/m2.

Exclusion Criteria

Patients who required additional surgery during the postoperative period; as well as those who had complications such as cardiorespiratory arrest; prolonged sedation; mechanical ventilation time greater than twenty-four hours; neurological complications; patients who could not understand or collaborate with the procedures were also excluded since the conducts applied in the inspiratory muscle training are volitional.

Study & Design

• Study Type: Intervention
• Study Design: Not specified