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Related Experiment Video

Updated: Jun 20, 2026

The Application of Point-of-Care Ultrasonography (POCUS) in the Management of Acute Respiratory Distress Syndrome (ARDS) in the Intensive Care Unit

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Safe limits for aspirate volume under wet liposuction.

João Cantarelli¹, Moacir F Godoy

¹Department of Cardiology and Cardiovascular Surgery, FAMERP, São José do Rio Preto, São Paulo, Brazil.

Obesity Surgery

|September 17, 2009

Summary

For wet liposuction, aspirating no more than 5% of body weight is a safe limit to prevent hypovolemia and shock. This guideline aligns with Advanced Trauma Life Support (ATLS) standards.

Area of Science:

Plastic Surgery
Surgical Safety
Hemodynamics

Background:

Hypovolemia is a potential hemodynamic complication of liposuction.
Establishing safe fluid volume limits is crucial for patient safety during liposuction procedures.
The Advanced Trauma Life Support (ATLS) criteria provide a framework for assessing trauma patients and can be adapted for surgical safety.

Purpose of the Study:

To determine a safe limit for aspirate volume in wet liposuction.
To correlate aspirate volume with patient body weight.
To establish guidelines for preventing hypovolemia based on established trauma care principles.

Main Methods:

Thirty patients undergoing wet liposuction were monitored noninvasively for 24 hours postoperatively.

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Vital signs (heart rate, blood pressure), urinary output, and respiratory rate were recorded.

Preoperative and postoperative (1 and 6 hours) hemoglobin, hematocrit, and leukocyte counts were analyzed.

Main Results:

Aspirate volumes ranged from 2.6% to 6.9% of body weight.
Postoperative tachycardia and/or hypotension were observed in 15 patients.
These hemodynamic disturbances were associated with aspirate volumes exceeding 5% of body weight.

Conclusions:

A safe limit for wet liposuction aspirate volume is proposed at 5% of body weight.
Adhering to this limit can help avoid hypovolemia and subsequent shock.
This recommendation is consistent with ATLS guidelines for patient management.