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Hemodynamic alterations in the transferred tissue to lower extremities
Hiroyuki Sakurai1, Takashi Yamaki, Masaki Takeuchi
1Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Shinjuku-ku, Tokyo 162-8666, Japan. bighiro@prs.twmu.ac.jp
Microsurgery
|October 24, 2008
Summary
Free flaps in the lower extremities show higher failure rates due to elevated venous pressure, impacting tissue perfusion. This study investigated the hemodynamic differences in free flap transplantation to the lower extremities versus other sites.
Area of Science:
- Microsurgery
- Vascular Surgery
- Tissue Transplantation
Background:
- Free flap transplantation is crucial for reconstructive surgery.
- Free flaps in the lower extremities exhibit a higher incidence of failure compared to other sites.
- The underlying physiological reasons for this disparity remain unclear.
Purpose of the Study:
- To investigate the physiological background of free flap failure in lower extremities.
- To compare early postoperative hemodynamic parameters between free flaps transplanted to the lower extremities and other recipient sites.
Main Methods:
- Retrospective review of 103 free flap cases.
- Analysis of 3-day postoperative in situ venous pressure, arterial pressure, and surface blood flow.
- Comparison of hemodynamic data between lower extremity (LE) group (N=29) and non-lower extremity (non-LE) group (N=74).
Main Results:
- Significantly higher venous pressure in the LE group (26.6 +/- 2.2 mmHg) compared to the non-LE group (14.8 +/- 1.2 mmHg).
- Lower arterial pressure observed in the LE group immediately post-surgery.
- Significant differences in hemodynamic data within transferred tissues between groups, particularly in the early postoperative phase.
Conclusions:
- Elevated venous pressure in the lower extremities may contribute to impaired tissue perfusion.
- These hemodynamic differences are critical in the early postoperative period for free flaps in the lower extremities.
- Understanding these factors can help improve outcomes for lower extremity free flap reconstructions.
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