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Published on: November 28, 2018
Ventilatory profile of patients undergoing CABG surgery
Katiane Tremarin Morsch1, Camila Pereira Leguisamo, Marcelo Dias Camargo
1Cardiology Institute of Rio Grandedo Sul/University Foundation of Cardiology, Research Unit of IC/FUC- Porto Alegre, RS, Brazil.
Insights
Coronary Artery Bypass Grafting (CABG) surgery significantly reduces lung function and ventilatory muscle strength postoperatively. Pulmonary events are also more common in the early recovery period.
Area of Science:
- Cardiology
- Pulmonary Medicine
- Thoracic Surgery
Background:
- Coronary Artery Bypass Grafting (CABG) is a common surgical procedure.
- Understanding postoperative pulmonary changes is crucial for patient recovery.
Purpose of the Study:
- To evaluate the ventilatory, radiological, and clinical status of patients after elective CABG.
- To assess changes in lung function and muscle strength pre- and post-surgery.
Main Methods:
- 108 patients undergoing elective CABG were studied.
- Spirometry assessed lung volumes and capacities.
- Vacuum manometer measured ventilatory muscle strength (MIP/MEP).
- Evaluations were conducted preoperatively and on the sixth postoperative day.
Main Results:
- Significant reductions in FEV1 and FVC were observed on postoperative day 6 compared to preoperative levels.
- Ventilatory muscle strength (MIP/MEP) significantly decreased post-surgery.
- Pulmonary events increased from 40% on day 1 to 78% on day 6 post-CABG.
Conclusions:
- CABG surgery leads to substantial reductions in pulmonary volume, capacity, and ventilatory muscle strength.
- These impairments are evident during the postoperative period, highlighting the need for respiratory support.
Objective:
To assess the ventilatory, radiological and clinical profile of patients undergoing elective CABG in a cardiology reference hospital in South Brazil.
Methods:
This study included 108 patients undergoing elective CABG surgery, in the period between April 2006 and February 2007 at the Cardiology Institute of Rio Grande do Sul (IC-FUC). The surgical procedure involved median sternotomy, and the saphenous vein and/or internal mammary artery were used for grafting. Lung volume and capacity, as well as the possible existence of ventilatory changes, were assessed by spirometry, and the ventilatory muscle strength was assessed using a vaccum manometer. All evaluations were performed on the preoperative period and on the sixth postoperative day.
Results:
Preoperative levels of FEV1 and FVC were significantly reduced on the 6th postoperative day (P<0.001) when compared to the preoperative levels. A significant decrease of ventilatory muscle strength, expressed as maximum inspiratory and expiratory pressures (MIP and MEP), was also observed from the pre- to the sixth postoperative day (P<0.001). Pulmonary events were more frequent on the 6th postoperative day (78%) than on the 1st postoperative day (40%).
Conclusion:
Patients undergone CABG surgery present important reduction in pulmonary volume and capacity, as well as on the ventilatory muscle strength during the postoperative period.
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