Reinforcement bronchial stump increases early mechanical integrity: an ex-vivo experimental study

Area of Science:

• Thoracic Surgery
• Surgical Techniques
• Biomedical Engineering

Background:

• Bronchial stump integrity is critical for successful lung resection outcomes.
• Various suture techniques exist, but their comparative efficacy in resisting air leakage requires further investigation.

Purpose of the Study:

• To evaluate the impact of different bronchial suture methods on bronchial stump pressure resistance.
• To determine if tissue reinforcement influences the mechanical integrity of the bronchial stump.

Main Methods:

• Fifty-four tracheo-bronchial tree specimens were used, divided into three groups (n=18) after simulated right pneumonectomy.
• Group 1: Interrupted suture pattern. Group 2: Continuous horizontal mattress + over-over continuous pattern. Group 3: Continuous over-over + diaphragmatic tissue reinforcement with interrupted U sutures.
• Air leakage pressure was measured using a sphygmomanometer following manual bronchial closure with 4-0 absorbable sutures.

Main Results:

• Groups 1 and 2 exhibited similar mean air leakage pressures (98 ± 37 mmHg and 95 ± 51 mmHg, respectively; p=0.985).
• Group 3 demonstrated a significantly higher mean air leakage pressure (153 ± 66 mmHg; p=0.002) compared to Groups 1 and 2.
• Tissue reinforcement in Group 3 led to superior resistance against air leakage.

Conclusions:

• Reinforcement of the bronchial stump with viable tissue significantly enhances its resistance to air leakage.
• This technique improves bronchial stump integrity, potentially reducing air leaks and improving patient outcomes.
• The findings support the use of tissue reinforcement in surgical closure of the bronchus.