When should the water-seal drainage system be placed during a thoracotomy procedure?

The water-seal drainage system should be placed after the pleural space is closed. This timing is critical because the primary purpose of the water-seal system is to allow air or fluid that accumulates in the pleural cavity to be evacuated, thereby preventing respiratory complications.

The placement of the drainage system after the pleural space is closed ensures that any potential air leaks or fluid accumulation that occur during the procedure can be managed effectively. If the drainage system were placed before closing the pleural space, there could be issues with maintaining a proper seal, potentially allowing air or other contaminants to enter the pleural space during the closure.

Understanding the sequence of applying a water-seal drainage system helps maintain optimal conditions for the patient’s recovery while minimizing the risk of complications associated with thoracic surgery.