How Much Tumescent Volume can be used During Liposuction

From Dry Liposuction to the 1982 Solution

How much tumescent volume can be used during liposuction is a question about the fluid put into the fat and the volume taken back out. In 1960 that fluid was not used. Liposuction done with no tumescent solution was called dry lipo. Tumescent liposuction was introduced in 1982 and was intended to provide two functions. The function carried in the solution described here is pain control.

Pain control is achieved with lidocaine. Lidocaine remains a numbing medicine, a local anesthetic. Bicarbonate is added to change the pH of the solution. That change allows a quicker onset of lidocaine, because lidocaine is able to traverse the nerve-cell membrane in more basic conditions. Both the lidocaine and the bicarbonate are placed in a large volume of lactated Ringer's solution. Lactated Ringer's mimics the physiologic fluid in the body. Expanding that fluid volume lets the tumescent solution cover a larger area.

The American Society of Plastic Surgeons describes the liposuction sequence as an infusion of diluted local anesthetic, followed by a cannula that suctions the fat. The same account names VASER as a later form of ultrasound-assisted liposuction, and it lists general anesthesia among the anesthetic choices. The concentrations, the additives, and the California volumes below are the details used here.

Why the Carrier Fluid Has to Cover a Larger Area

The early solution did not change its ingredients so much as its reach. Lidocaine numbs. Bicarbonate speeds the onset by making the solution more basic, so the anesthetic crosses into the nerve cell. Neither ingredient, on its own, spreads across a torso. The lactated Ringer's solution is the carrier. It is a physiologic fluid, and it is used in a large volume so the lidocaine is not trapped in one small pocket of fat.

That spread is infiltration. The volume of infiltration is the amount of tumescent solution placed in the tissue before aspiration begins. Aspiration is what the cannula brings back out, a mix of fat and fluid. A wetting method is any plan that sets infiltration against aspiration. The wet technique and the superwet technique are both wetting methods. They do not use the same ratio, and the difference decides how much fat can come out once a ceiling is reached.

VASER in 1995 and the Maximum Safe Infiltrate

The components of the solution changed very little until ultrasound-assisted VASER liposuction in 1995. That change led to high-definition liposuction. High-definition VASER liposuction routinely uses the maximum safe volume of infiltrate, because the operation is 360-degree liposuction. Fat is treated around the torso, not in a single patch, so the infiltrate has to reach every treated surface.

High-definition VASER liposuction still depends on that infiltrate. The ultrasound does not replace the tumescent solution. Because the treatment circles the body, the surgeon is often working at the top of the safe infiltrate rather than at a token amount placed in one bulge. The maximum is a ceiling set by safety and by policy. It is not a quota that every case is required to hit.

One-Half Percent Lidocaine Under General Anesthesia

Several modifications of the solution came with high-definition liposuction. The first is the lidocaine concentration. The solution uses one-half percent lidocaine rather than 1 percent lidocaine. Routine use of maximum volumes raises the risk of lidocaine toxicity, and the lower concentration is the step taken against that risk. Patients who undergo high-definition liposuction are under general anesthesia. That is different from awake liposuction performed with laser liposuction, where the lidocaine itself is carrying more of the anesthetic burden.

The lower percentage does not change what lidocaine is. It is still the local anesthetic in the solution. It changes how much of that anesthetic is present in each liter when the infiltrate is large. A case that routinely approaches the maximum volume cannot use the stronger concentration and still treat the whole torso. The one-half percent mixture is how this practice keeps pain control inside a large infiltrate.

Tranexamic Acid, Clonidine, and Dexamethasone

Later additives address blood loss and inflammation, not a new numbing drug. Tranexamic acid is added to minimize blood loss. Clonidine is added for the same purpose. It decreases local pressure so that unnecessary bleeding is avoided. Dexamethasone, a steroid, is added to minimize the inflammatory response.

The steroid matters because high-definition liposuction removes fat more comprehensively than a small local reduction. That broader removal can irritate the soft tissue. The inflammatory response that follows can promote soft-tissue scarring. Dexamethasone is used to taper that response. These additions sit in the same lactated Ringer's fluid as the lidocaine and the bicarbonate. They do not raise the California volume limit, and they do not change the ratio of infiltration to aspiration.

The California Limit on Infiltration and Aspiration

How much tumescent volume can be used in California is a maximum of 5 liters. That maximum covers tumescent liposuction volume of infiltration and of aspiration. It assumes the wet technique, with infiltration and aspiration at 1 to 1. Put in 5 liters under that wetting method, and 5 liters is the matching aspiration volume the rule is built around. Body contouring that stays inside this limit still has to treat the concern areas the plan named. The ceiling is on volume, not on which surface was left out by accident.

Laser liposuction was developed in 2006 and uses a superwet technique. Infiltration to aspiration in that technique is 3 to 1. Out of the maximum 5 liters infiltrated, only one third can be aspirated. That aspirate is 1.6 liters. The same 5 liter infiltration ceiling therefore yields a much smaller harvest when the wetting method is superwet. Liposuction technique has to be named before the aspirate number means anything, because 1 to 1 and 3 to 1 do not empty the same amount of fat from the same infiltrate.

High-definition work is expected to address all concern areas so the contour reads as one piece. A 360-degree plan pushes toward the maximum safe infiltrate for that reason. A superwet laser plan under the same 5 liter infiltration cap cannot aspirate 5 liters. It can aspirate 1.6 liters. Choosing the technique is part of choosing the volume. The numbers are not interchangeable.

The Patient and the Legislative Policy

How much tumescent volume can be used is also set by the individual patient and by legislative policy. The 5 liter figure is the maximum allowed here under the assumptions above. It is not a personal prescription written before anyone has been examined. Two people can both be candidates for liposuction and still differ in how much infiltrate their case should take, because the areas, the technique, and the policy that applies are not identical.

Fees for liposuction are kept on the liposuction cost page and are not restated as a price per liter. Where the operation is offered is kept on the liposuction locations page. Neither of those pages changes the California volume rule. A consultation can match the solution to the person. It does not create a private exception to the 5 liter maximum of infiltration and aspiration.

What the Opening Photograph Shows

The opening photograph is a 37-year-old woman after a mini tummy tuck and HD Lipo 360, with fat grafting to the buttock and the hip dips. The graft in that description is fat placed in the subcutaneous tissue over the glute and at the hip dips. The picture records a silhouette. It does not answer how much tumescent volume can be used, and it is not a diagram of the 1 to 1 or 3 to 1 ratio. The volume rules above stand on their own, separate from that result.