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KMID : 0358819820090030269
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Journal of Korean Society of Plastic and Reconstructive Surgeons
1982 Volume.9 No. 3 p.269 ~ p.276
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THE EFFECTS OF VENOUS DRAINAGE ON SURVIVAL OF AXIAL PATTERN FLAPS IN RATS
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Rah Dong-Kyun
Choe Joon
Shin Keuk-Shun
You Jae-Duk
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Abstract
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Recent advances in microsurgery and myocutaneous flaps have induced many surgeons to consider skin flaps from a new point and this has produced an interest in fundamentals governing flaps. There have been many discussions about the importance of the vessels and blood flow as well for the survival of flaps. In this study we investigated which vessel, the artery or the vein, is more important in the survival of flaps.
The venous drainage can be considered as critical as the arterial inflow regarding the tissue for survival. The experiment was carried out by doing gradual shut-off the venous drainage of the vascularized island flaps in 30 rats. The unilateral thoracoabdominal flap vascularized by the lateral thoracic artery and vein and the epigastric artery and vein was made in each animals and divided into 6 groups.
Control group which included both the lateral thoracic and in intact epigastric artery and vein:
Group (Ⅰ) which included same vessels as control except ligation of epigastric vein.
Group (Ⅱ) which were same as control except ligation of both veins:
Group (Ⅲ) which were same as control except complete ligation of epigastric vein and incomplete ligation of lateral thoracic vein as the lumen of the vessel occluded by the half size:
Group (Ⅳ) which included same vessels as group (Ⅱ) but proximal skin pedicle was preserved:
Group (Ⅴ) same as group (Ⅳ) except preserving the half width of the skin pedicle.
The survival of the flaps with its contracture rate in each group was subsequently observed and analized. The followings were summerized as conclusion.
1. Complete shut-off the venous drainage revealed total necrosis of the flaps but good amounts of the flap survival was seen with even small amount of venous drainage.
2. The venous drainage was considered to be a very important factor on survival of axial pattern flap and the be acting in accordance with "all or none" principle.
3. Under the poor condition induced by shut-off of the venous drainage gradually, the survival of the flap can be maintained, but the flaps revealed increased contracture.
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KEYWORD
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