Does VASER liposuction really work? Research measured differences in skin tightening and bleeding

In a randomized trial comparing VASER liposuction to conventional liposuction on both sides of the same person's body, improved skin tightening and reduced bleeding were confirmed[1]. However, pain, swelling, appearance, and preferences of the patient and physician showed no difference at the 6-month mark[1]. What "works" does not mean satisfaction with the final result, but rather two points: skin tightening and bleeding — this is the realistic expectation aligned with current research.

What kind of research can claim it "works"?

At the center is one trial involving 20 subjects. At multiple facilities, one side of the same person's body underwent VASER and the other side conventional liposuction, with the evaluator blinded to the method used for comparison[1]. Because the comparison is made within the same person, differences in body constitution and lifestyle habits are less likely to confound the results.

A 2017 review summarizing the evidence for liposuction also cited this trial as the primary evidence for VASER[2]. On the other hand, a document compiled by 5 specialist physicians over 4 months in 2023 states that although VASER is widely used, published guidelines are sparse[3]. In other words, the current state is that there is one solid trial supporting efficacy, and beyond that, reliance on clinical experience remains substantial.

How much does skin tightening differ?

In the review summary, skin tightening was reported as improved by 6%[2]. The trial authors characterized this difference as a meaningful improvement both statistically and clinically[1].

However, areas with severe sagging (skin laxity) were not examined. The authors note that areas with excess skin, such as male breast enlargement or the knee, remain a future research question[1]. For people with substantial excess skin, it is safer not to apply the 6% figure directly.

Does bleeding decrease?

Yes. The blood content per 100 cc of aspirated fat was 11.2 cc on the VASER side compared to 14.0 cc with conventional methods, representing a 26% reduction[1].

However, the review characterizes this difference as a small advantage of 3 cc per 100 cc[2]With minimal aspiration, the difference is barely perceptible; this is a figure that becomes meaningful as the volume of aspiration increases.

Do pain and aesthetic satisfaction change?

They did not change in the trial. At the 6-month mark, there was no difference from the conventional method in pain, swelling, appearance, or whether the patient or physician preferred the result.[1]The claim that 'VASER delivers satisfactory results' does not align with the findings of this trial.

Regarding satisfaction, there is a report showing the importance of design strategy. In a longitudinal report of 743 men who underwent ultrasound-assisted liposuction, stratified by age group, mean satisfaction increased from 59.3 to 73.8, and clinically significant complications decreased from 15.4% to 4.6%.[4]The etched abdominal muscle style showed high initial satisfaction but did not last, and was noted to often lead to dissatisfaction with an 'artificial abdominal muscle' appearance.[4].

What are the complications? Do they vary by body habitus or aspiration volume?

Body habitus and aspiration volume are markers used to investigate the relationship to complications. A single-center report of VASER examined the association between BMI, the volume of aspirated fat, and postoperative complications.[5].

There are also results from combination with skin-excision surgery. In a prospective study of 100 women who underwent VASER combined with abdominal skin tightening, there were no cases of skin necrosis, and localized complications occurred in 7%.[6]The breakdown was fluid accumulation 2%, small hematoma 1%, mild wound infection 3%, and delayed wound healing 1%.[6]Since these are combination surgery figures, the conditions differ from liposuction alone.

Four things to confirm at your consultation

The first is the area where you expect skin tightening and how much excess skin is present in that area.[1]The second is where your BMI and planned aspiration volume fall within that facility's standards.[5]The third is how fluid accumulation or hematoma will be managed if it occurs.[6]The fourth is whether the approach emphasizes contour enhancement or preserves a natural shape.[4].

Skin thickness, elasticity, and fat distribution vary from person to person. The figures in this article are population averages and do not predict how much your skin will tighten. At your consultation, have the excess skin and elasticity examined directly, and confirm together whether the difference achieved with VASER will be meaningful for that area.