Tumescent Liposuction without Lidocaine

Area of Science:

• Regenerative Medicine
• Stem Cell Biology
• Plastic Surgery

Background:

• Previous research indicated lidocaine negatively impacts adipose-derived stem cell (ASC) survival.
• General anesthesia is common in large-volume liposuction, making lidocaine tumescent anesthesia potentially unnecessary.
• The study investigated if omitting lidocaine from tumescent solution enhances stromal vascular fraction (SVF) and ASC survival.

Purpose of the Study:

• To evaluate the impact of lidocaine in tumescent anesthesia on SVF and ASC survival.
• To compare the efficacy of tumescent anesthesia with and without lidocaine.
• To assess the cytotoxic effects of ropivacaine on ASCs.

Main Methods:

• Liposuction was performed on bilateral body areas in 10 adult patients under general anesthesia.
• One side received standard tumescent with lidocaine; the contralateral side received tumescent without lidocaine.
• SVF was isolated, and adherent ASCs were cultured and quantified; apoptosis and necrosis were analyzed via flow cytometry.

Main Results:

• The no-lidocaine group showed significantly higher live SVF cell percentages (86.7% vs. 68.0%) and lower apoptosis rates.
• Viable ASC counts were significantly greater in the no-lidocaine group (500,000 vs. 367,000).
• No significant difference in ASC cytotoxicity was observed between lidocaine and ropivacaine.

Conclusions:

• Omitting lidocaine from tumescent solution significantly reduces SVF and ASC apoptosis in liposuction aspirate.
• Tumescent liposuction without lidocaine is recommended, especially when lipoaspirate is intended for fat grafting.
• Further research may explore alternative local anesthetics and their effects on stem cell viability.