A key factor in liposuction results is the width of the surgeon’s cannulae (internal suction probes). Wider and bigger cannulae are helpful for the surgeon to save time as they can remove more fat in less time. However, they usually are a DISADVANTAGE to patients. These wider cannulae need larger skin incisions and also create wider ridges in the fatty layer leading to noticeable unevenness if patients gain weight.. Small cannulae do not usually cause these ridges and usually provide a more natural result.