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.
Abstract

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