Intramuscular Pressure Dynamics During Rectus Abdominis Fat Grafting and Plication

Area of Science:

• Plastic Surgery
• Abdominal Wall Mechanics
• Surgical Outcomes

Background:

• Rectus abdominis fat transfer (RAFT) is popular for abdominal contouring.
• The impact of RAFT and abdominal plication on intramuscular pressure is not well understood.

Purpose of the Study:

• To characterize intramuscular pressure changes during RAFT with standardized fat grafting volumes.

Main Methods:

• Retrospective cohort study of 86 patients undergoing RAFT.
• Intramuscular pressure measured intraoperatively before and after fat grafting, and after abdominal plication.
• Measurements taken in rectus abdominis and external oblique muscles.

Main Results:

• Fat grafting alone caused minimal pressure changes.
• Abdominal plication significantly increased intramuscular pressure in multiple regions.
• No fat necrosis or ischemia observed; low complication rate (3.48%) and high patient satisfaction.

Conclusions:

• Abdominal plication, not fat grafting, is the main driver of pressure increase in RAFT.
• Increased pressure did not lead to immediate adverse events, but safe thresholds are undefined.
• Further prospective studies are needed to clarify clinical significance.