What is the maximum decrease in lung and chest wall compliance after 3 days post-surgery?

The maximum decrease in lung and chest wall compliance after 3 days post-surgery is widely recognized as approximately 15%. This reduction is attributed to several physiological changes following surgical interventions, particularly those involving the thoracic cavity.

After surgery, especially procedures that involve the chest, patients often experience changes such as pain, reduced movement, and increased stiffness of the chest wall due to surgical trauma or muscle guarding. This behavior can lead to atelectasis or reduced lung inflation, contributing to decreased compliance.

Also, the significant role of postoperative pulmonary complications, including the effects of anesthesia and post-surgical positioning, can further compromise lung function. Collectively, these factors contribute to a notable but not maximal decrease in compliance, with studies suggesting this 15% figure as a commonly observed threshold within the first few days following surgery. This understanding is essential for perfusionists in anticipating recovery challenges and planning postoperative care effectively.