Female Abdominal Landmarks and Their Improvements Using Polydioxanone Thread Placement for Umbilicus Elevation

Abstract

Background: Different landmarks on the abdomen have been used to evaluate abdominal aesthetics. However, because researchers use different methods for landmark measurements, there is no consensus as to which landmarks to use for either assessing abdominal aesthetics or guiding surgical planning. Methods: Female model photographs were analyzed for abdominal aesthetics with the umbilicus as the key dividing point. Because of the limitation on the number of landmarks that could be shown with model photographs, abdominal landmarks on actual female patients were studied. The variations of landmark metrics due to positional changes and before/after our polydioxanone (PDO)–assisted high-definition liposuctions were recorded. Results: For model photographs, the abdominal apex to mid-umbilicus distance (AU) versus midumbilicus to lower abdominal skin crease (UC) ratio was 1.626. Almost all bony landmarks demonstrated significant caudal shift when switched from standing to supine positions. Meanwhile, other landmarks also underwent substantial changes. This provides evidence that metrics taken in different positions cannot be compared with one another. As expected, after umbilici were elevated with our special technique, the relevant metrics improved postoperatively, with results close to being ideal. However, marked deviations from the mean measured values do exist. Conclusions: Abdominal landmarks change with positional adjustment. In standing position, many landmarks can be used for assessment of abdominal aesthetics. Ideally, efforts should be made such that the final AU/UC is close to 1.618, and XU/UP and UIC close to ideal, for satisfactory surgical results. Nevertheless, in actual practice, umbilicus positions can be varied to accomplish desired goals.