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Hemodynamic physiology and thermoregulation in liposuction
Jeffrey M Kenkel1, Avron H Lipschitz, Maureen Luby
1Department of Plastic Surgery, Nancy Lee and Perry R. Bass Advanced Plastic Surgery and Wound Healing Laboratory, University of Texas Southwestern Medical Center, Dallas, 75390-9132, USA. jeffrey.kenkel@utsouthwestern.edu
Plastic and Reconstructive Surgery
|July 28, 2004
Summary
Large-volume liposuction significantly impacts patient physiology, increasing cardiac index and heart rate while causing hypothermia. Epinephrine levels correlate with cardiac function, necessitating cardiovascular screening and hypothermia prevention.
Area of Science:
- Physiology
- Anesthesiology
- Cardiovascular Medicine
Background:
- Large-volume liposuction involves prolonged procedures, general anesthesia, and significant fluid shifts.
- Physiologic responses, including thermoregulation and cardiovascular changes, are not well understood.
- High doses of epinephrine and lidocaine are administered, potentially affecting patient hemodynamics.
Purpose of the Study:
- To determine perioperative hemodynamic parameters during large-volume liposuction.
- To quantify perioperative and postoperative plasma epinephrine levels.
- To document chronological fluctuations in core body temperature.
Main Methods:
- Five healthy female volunteers (ASA physical status I and II) underwent liposuction.
- Hemodynamic parameters (heart rate, blood pressure, cardiac index, pulmonary arterial pressure, central venous pressure) were monitored.
- Serum epinephrine levels and core body temperature were assessed perioperatively.
Main Results:
- Cardiac index, heart rate, and mean pulmonary arterial pressure increased significantly (p < 0.05).
- Maximum epinephrine levels occurred 5-6 hours post-induction, correlating with cardiac index (r = 0.75).
- All patients experienced intraoperative hypothermia (mean 35.5°C); central venous pressure remained stable.
Conclusions:
- Large-volume liposuction enhances cardiac function, potentially due to epinephrine, hemodilution, or anesthesia emergence.
- Elevated pulmonary arterial pressure may relate to subclinical fat embolism.
- Healthy patients tolerate fluid loads, but screening for cardiovascular issues and preventing hypothermia are crucial.