Pulmonary Function, Muscle Strength, and Functional Capacity in Minimally Invasive Cardiac Surgery

Condition(s) studied

Study summary

The goal of this observational study is to evaluate pulmonary function, respiratory muscle strength, peripheral muscle strength, and functional capacity in adult patients undergoing either minimally invasive cardiac surgery (via mini-thoracotomy) or conventional sternotomy for coronary artery bypass grafting (CABG) at Gülhane Training and Research Hospital.The main questions it aims to answer are:

Does minimally invasive cardiac surgery preserve pulmonary function better than conventional sternotomy? Does minimally invasive cardiac surgery result in less respiratory and peripheral muscle weakness compared to conventional sternotomy? Researchers will compare patients undergoing minimally invasive surgery with those undergoing conventional sternotomy to determine differences in pulmonary function, respiratory muscle strength, peripheral muscle strength, and functional capacity.

Participants will:

Undergo preoperative and postoperative (day 4) assessments including spirometry, inspiratory/expiratory mouth pressure measurements, and peripheral muscle strength testing (handgrip, shoulder flexion/abduction, hip flexion, knee extension).

Perform functional capacity tests (30-second sit-to-stand test, 6-minute walk test).

Complete questionnaires assessing pain (McGill Pain Questionnaire) and fear of movement (Tampa Scale of Kinesiophobia).

Eligibility

Primary outcome measure(s)

• Change in Pulmonary Function - Forced Vital Capacity (FVC) — Baseline [preoperative] and postoperative day 4)
  Forced Vital Capacity measured by spirometry. Results will be reported in liters (L).
• Change in Pulmonary Function - Forced Expiratory Volume in 1 second (FEV1) — Baseline to postoperative day 4
  Forced Expiratory Volume in 1 second measured by spirometry. Results will be reported in liters (L).
• Change in Respiratory Muscle Strength - Maximal Inspiratory Pressure (MIP) — Baseline [preoperative] and postoperative day 4
  Inspiratory muscle strength measured with mouth pressure device. Results will be reported in cmH₂O.
• Change in Respiratory Muscle Strength - Maximal Expiratory Pressure (MEP) — Baseline [preoperative] and postoperative day 4
  Expiratory muscle strength measured with mouth pressure device. Results will be reported in cmH₂O.
• Change in Handgrip Strength — Baseline to postoperative day 4
  Handgrip strength measured with handheld dynamometer. Results will be reported in kilograms (kg).
• Change in Knee Extension Strength — Baseline to postoperative day 4
  Knee extension strength measured with handheld dynamometer. Results will be reported in kilograms (kg).
• Change in Functional Capacity - 30-Second Sit-to-Stand Test — Baseline to postoperative day 4
  Number of repetitions performed during the 30-second sit-to-stand test. Results will be reported as number of repetitions.
• Change in Functional Capacity - 6-Minute Walk Distance — Baseline to postoperative day 4
  Distance covered during the 6-minute walk test. Results will be reported in meters (m).

Trial sites (1)

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