Random Pattern Flaps

Random pattern flaps derive their blood supply from the dermal and subdermal plexus (Fig. 1.2). The ratio

Axial Flap
Fig. 1.2 Random pattern skin flap for facial use has an approximately 2:1 ratio of length to width. A special type is the subcutaneous pedicle flap (Barron et al. 1965; Lejour 1972; see Figs. 5.44 and 5.45).
Random And Axial Pattern Flap

Fig. 1.1 a Structure of the skin,

1. Subpapillary vascular plexus

2. Dermal vascular plexus

3. Subdermal vascular plexus

4. Segmental vascular plexus

Fig. 1.1 a Structure of the skin,

1. Subpapillary vascular plexus

2. Dermal vascular plexus

3. Subdermal vascular plexus

4. Segmental vascular plexus

Fig. 1.1 b Composition of free skin grafts.

Nv ________/T^V

5 .J

/ y ii„„."" .-- \

Fig. 1.3 The axial pattern flap is based on a specific artery. Examples are the forehead flap, Esser's cheek rotation, and the median forehead flap (see Figs. 5.49a, 6.18, and 8.1).

Fig. 1.3 The axial pattern flap is based on a specific artery. Examples are the forehead flap, Esser's cheek rotation, and the median forehead flap (see Figs. 5.49a, 6.18, and 8.1).

Island Flap
Fig. 1.4 Island flap. A variant of this flap is the neurovascular island flap, which includes a nerve supply (Karapandzic 1974; Weerda 1980c; Weerda and Siegert 1991; see Fig. 6.17).

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