๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Bilateral advancement flap (O-to-H)
Bilateral advancement flap (O-to-H)
The bilateral advancement flap, also known as an H-plasty, is formed by creating two opposing O-to-U unilateral advancement flaps (Fig. 21-19). The result is an H-shaped scar that is ideally masked within relaxed skin tension lines or along cosmetic subunit junctions. Prior to making incisions for the second pedicle of the flap, it may be prudent
to completely undermine and mobilize the first pedicle to assess if the second arm is absolutely necessary. The two arms of the flap may be sized differently depending on the degree and location of required tissue movement.
Figure 21-19. Bilateral advancement flap O-to-H design. Bidirectional primary tissue movement is seen and two standing cones are displaced.