Dramatic transformation with "Fat liposuction + fat transfer"! Explained from graft survival rate to downtime
Are you throwing away the fat you just extracted? Actually, it might be the best material to rejuvenate you.
"I want to get through the painful downtime only once" "If I'm going to do it anyway, I want to clean up all the problem areas at once"... Don't you think so?
This article provides a thorough, evidence-based explanation of "Fat liposuctionand simultaneous fat transfer," which reduces fat in areas difficult to lose through diet while simultaneously achieving volume enhancement to the face and bust.
【What you'll learn from this article】
- Benefits of "cost and anesthesia" when performing liposuction and transfer simultaneously
- The specific process of fat 'relocation' from extraction through refinement to injection
- Real "fat graft survival rate" and "necrosis risk" revealed by the latest research papers
- Post-operative downtime of concern (swelling, bruising, compression period)
1. Is it a waste to pay high money and throw it away? The biggest benefit of simultaneous procedures
ConventionalHyaluronic acid injectionUnlike minor procedures such as these that are absorbed by the body and disappear within a few months to a year, transplanted autologous fat remains in your tissue on a "semi-permanent" basis.
Performing liposuction and fat transfer simultaneously offers significant practical benefits beyond the pursuit of beauty.
① Reduction of physical burden and anesthesia risk
When surgery is performed at separate times, each procedure incurs physical burden from local anesthesia, intravenous anesthesia, general anesthesia, and other factors. With simultaneous procedures,you can minimize physical damage and risk from anesthesia to a single occurrence.
② Significant cost savings
When procedures are performed separately, basic fees (anesthesia costs, operating room fees, etc.) are incurred twice. When performed simultaneously, these basic costs are needed only once, making it possible to significantly reduce total costs. Furthermore, compared to the ongoing cost of repeatedly injecting expensive hyaluronic acid every few months, the long-term financial benefit is substantial.
2. Where to harvest and where to inject? Your fat relocation route
Our bodies have areas where fat "accumulates easily" and areas where we "don't want to lose fat." Balancing this imbalance is the essence of fat transfer.
- Harvest sites (donor sites):Fat is primarilyharvested from the lower abdomen and thighs (inner and outer thighs)The fat from these areas is rich in adipose-derived stem cells (ASCs) and stromal vascular fraction (SVF), making it excellent material as it promotes cell rejuvenation and angiogenesis after transplantation.
- Injection site (recipient):Due to aging, collagen, bone, and fat atrophy, creating hollownessForehead, temples, under the eyes (tear trough), cheeks, nasolabial folds, marionette lines, lipsand other areas receive injections. Outside the face, it is also used for breast augmentation.
3. [Illustrated Guide] 3 Steps from Extraction to Injection
In fact, whether the transplanted fat survives or dies depends on the "fineness of the fat particles"…
In the operating room, the extracted fat is not simply transferred to another site as-is. Only after the following three rigorous steps does it become "living material" that can be injected.
Fat Grafting 3-Step Process
1
Harvesting
After tumescent solution injection, using a thin cannula withlow-pressure aspiration. Extract living cells intact without damage.
2
Processing
3000 rpm (approximately 1200G) for 3 minutesCentrifugation. Eliminates blood, oils, and dead cells, concentrating only pure fat and stem cells (SVF).
3
Injection (Injection / MAFT)
Micro autologous fat transplantation (MAFT) with1/120 mL unitultra-fine injection. Multi-layered distribution over periosteum, muscular layer, and subcutis in a mille-feuille pattern. Prevents central necrosis.
【Step 1】Harvesting
Tumescent solution containing hemostatic agents and anesthetic is injected into the target area, and fat is gently and carefully suctioned at low pressure without damaging cells. A thin cannula (suction tube) is used to harvest fat while preserving the shape of living cells.
【Step 2】Processing
Freshly harvested fat contains blood, anesthetic solution, dead cells, and impure oils. If these are injected as-is, they cause inflammation and nodules. Therefore, the fat is centrifuged (for example: 3000 rpm / approximately 1200G for 3 minutes), extracting and concentrating only pure, healthy fat cells.
【Step 3】Injection
The purified pure fat is transferred into an ultra-fine syringe. In micro autologous fat transplantation (MAFT) technique, the injection volume per session is set to be extremely fine (for example, an ultra-small size of 1/120 mL), and fat is distributed across multiple layers—over bone, within muscle, and in subcutaneous tissue—and injected in a mille-feuille pattern.
4. Exposed by research data! The real "fat survival rate" and "risks"
The average survival rate of fat grafting to the face is "47%". However, when certain conditions are met, this figure and risks change dramatically. Cosmetic medical procedures always carry risks. Let's look at realistic figures based on statistical data from medical literature.
What is the realistic fat survival rate (engraftment rate)?
According to a meta-analysis (a highly reliable study integrating multiple papers) of 1,011 patients who underwent fat grafting to the face, objectively measuredaverage facial fat survival rate is "47% (95% confidence interval 41–53%)"has been reported (Lv et al., 2020).
Another study also points out that fat injected using conventional methods experiences "20%–90% resorption" due to inadequate blood flow (Wei et al., 2017). In other words, not all 100% of the injected fat remains; physicians calculate and design the injection plan anticipating that approximately half will be resorbed.
Risk of nodules and fat necrosis (Central Necrosis)
For fat to engraft, it must be supplied with nutrients and oxygen (new blood vessels) from surrounding tissues. According to medical research, only tissue within a range of "1.5 ± 0.5 mm" from the periphery of the injected fat mass can survive, and the survival rate is reported to be approximately 40% (Carpaneda, 1993).In other words, if the lump (radius) of fat being injected exceeds 2mm, blood cannot reach the center, and"central necrosis (fat necrosis)"occurs. This is the leading cause of hard "nodules (nodular tissue)" or "calcification" and "cysts" after the procedure. To prevent this, modern practice requires advanced techniques that inject in units smaller than a grain of rice, bit by bit.
Other complication risks
A study examining data from 1,011 individuals (Lv et al., 2020) reported nodules, infection, asymmetry, overcorrection, and chronic swelling among other complications at a"total complication rate of 2.8%"Overall, this can be said to be a procedure with very high safety.
However, in extremely rare cases, if fat is accidentally injected into facial blood vessels (particularly around the eyebrows or forehead area), it can cause arterial embolism, leading to skin necrosis, and in the worst case, blindness or stroke (Moellhoff et al., 2023). For this reason, it is critically important to choose an experienced physician who is well-versed in facial anatomy and implements strict safety protocols, such as using blunt-tipped cannulas.
5. Concerning downtime: How much swelling, bruising, and compression period should I expect?
When performing simultaneous procedures, there are two periods of downtime: one for the "area where fat was harvested" and one for the "area where fat was injected."
【Downtime for the fat-harvesting site (abdomen, thighs)】
- Pain: For the first few days to one week after surgery, there is pain similar to intense muscle soreness.
- Bruising and swelling: Within 1–2 weeks, bruising turns yellow and gradually subsides.
- Compression period: This is extremely important to minimize post-operative swelling and achieve a clean result (preventing contracture). Although protocols vary by clinic,at minimum, 24-hour firm compression immobilization for 1–2 weeks after surgery, and daytime compression with gardles or similar devices is recommended for an additional 1–3 months.
【Downtime for the fat-injection site (face, breast)】
- Swelling:Swelling peaks on postoperative day 3, and major swelling subsides within approximately 1–2 weeks.
- Bruising:Bruising may occur at a level that can be concealed with makeup, but it will disappear within 1–2 weeks.
- Absolute taboo:During the period when new blood vessels extend into the injected fat and it takes root (approximately 1 month postoperatively),you must absolutely not massage or rub the area forcefully.Fragile blood vessels that are beginning to establish themselves may rupture, causing the fat to die and reducing the survival rate.
If you think "What about my case?"
Schedule a free consultation
We do not engage in high-pressure sales. Please feel free to contact us.
6. Summary
- Two benefits in one efficient procedure:Simultaneous fat extraction and transfer significantly reduce the burden of anesthesia and costs.
- Rejuvenation with living material:Fat harvested from the thighs or abdomen is rich in stem cells, which contribute to skin regeneration and volume enhancement.
- Survival rate is approximately 50%:According to published research, the average facial fat survival rate is 47%. Injecting in bulk carries risks of necrosis and hardening, so refined injection technique is essential.
- Plan your downtime:Success depends on maintaining compression and immobilization of the extraction site (1–3 months) and keeping the injection site at rest (no massage).
7. Frequently Asked Questions (FAQ)
Q1. Once the fat takes, if I go on a diet in the future, will it disappear along with the rest of my body fat?
A. Yes, it will change just like the rest of your body's fat.
Once fat cells have successfully taken root, they live as part of your facial tissue. Therefore, if extreme dieting causes overall body fat to decrease, the injected facial fat may also become smaller. Conversely, if you gain weight, it may expand as well. After the procedure, it is best to avoid extreme weight fluctuations.
Q2. Will I achieve a perfect result after just one treatment?
A. Multiple treatments may be necessary.
As published data shows, the average survival rate is approximately 47%. Injecting a large amount initially increases the risk of fat necrosis and hardening, so a safe amount is injected. Therefore, if you desire more substantial volume enhancement, a second "touch-up (additional injection)" may be recommended approximately 6 months after the initial procedure.
Q3. Can I massage the area after treatment to shape the fat that was injected into my face?
A. Absolutely not!
Freshly transplanted fat is extremely unstable and is waiting for blood vessels to extend from the surrounding tissue. If external pressure is applied through massage within 1 month postoperatively, the delicate new blood vessel network being formed will be destroyed, causing the fat to die and dramatically reducing the survival rate. Keep the injection site as undisturbed as possible and rest it gently.