Comparing various surgical delay methods with ischemic preconditioning in the rat TRAM flap model

Area of Science:

• Plastic Surgery
• Surgical Innovation
• Tissue Engineering

Background:

• Flap survival is crucial in reconstructive surgery.
• Surgical delay and ischemic preconditioning (IP) are known methods to improve flap survival.
• The transverse rectus abdominis musculocutaneous (TRAM) flap is a common flap used in reconstructions.

Purpose of the Study:

• To compare the efficacy of various surgical delay techniques and IP in enhancing TRAM flap survival in a rat model.
• To determine which surgical delay method provides superior flap survival compared to IP.

Main Methods:

• A 6x3 cm TRAM flap was created in 40 Wistar rats, divided into five groups.
• Groups included: control, surgical delay (vessel ligation or skin incision), and IP (ischemia/reperfusion cycles).
• Flap survival area was measured and statistically analyzed one week after the main procedure.

Main Results:

• Surgical delay groups (vessel ligation and combined incision/ligation) showed significantly greater flap survival than the control group (p < 0.001).
• Both surgical delay methods were superior to ischemic preconditioning in increasing flap survival.
• IP also increased flap survival compared to the control, but to a lesser extent than surgical delay.

Conclusions:

• Surgical delay is a more effective method than ischemic preconditioning for improving TRAM flap survival in rats.
• Specific surgical delay techniques, such as superior deep epigastric vessel ligation, offer significant benefits for flap viability.
• Further research may explore optimizing surgical delay protocols for clinical application.