Septal perforators for an S-GAP flap: Preliminary study. Color Doppler study Every volunteer was in prone position. First line A and B were drawn on the skin (fig 4.4a-4.4b-4.5). Next the superior margin of the gluteus maximus muscle (fig 4.4a-4.4b, line C) and the iliac crest (fig 4.4a-4.4b, line D) were identified and drawn on the skin, positioning the probe approximately parallel to this margin (fig 4.4a). The probe then was rotated 90° (fig 4.4b) and every perforator was identified and drawn on the skin (fig 4.5): it was possible to identify perforators running underneath the gluteus maximus muscle even when it was not possible to follow them to their origin from the superior gluteal artery (fig 4.6). The distances of the identified perforators from line A and line B again were registered. Figure 4.4a Gluteal region. Line A: midsagittal Figure 4.4b Identification of septal perforators. line. Line B: line perpendicular to line A Probe rotated 90˚ with respect to the initial po- originating at the cranial end of the natal cleft. sition. Line C: superior margin of the gluteus maximus muscle. Line D: margin of the crista iliaca. Initial position of the probe. 52
5. lay-out phd DEFINITIEF_digitaal2
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