Why Fat Graft Survival Rates Can Drop When Too Much Is Injected

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Hello,

I am Hyunju Seong, Director of Cheongdam OK Clinic.

▶ Regular member of the Korean Academy of Cosmetic Surgery (KACS)
▶ Regular member of the Korean Society for the Study of Obesity (KSSO)
▶ Regular member of the Korean Association of Obesity and Aesthetic Treatment (KAAM)
▶ Regular member of the Korean Society of Liposuction (KSSL)
▶ Regular member of the Korean Society of Aesthetic Surgery (KSAS)

When considering fat grafting,

many people think,

“If I put in a lot at once, won’t it last longer?”

In fact, in an effort to create volume clearly,

a person may choose to increase the initial injection amount.

Fat graft survival rate

However, fat grafting is not something that will simply

stay in place just because more was injected.

In fact, if too much is injected,

the survival rate can decrease and the results can become unstable.

Table of Contents
1. Fat graft survival rate: how is it determined? 2. Why does survival rate drop when too much is injected? 3. Why the right injection amount matters 4. Criteria for stable results

1. Fat graft survival rate: how is it determined?

In fat grafting, survival rate refers to

the proportion of injected fat that survives by

connecting with blood vessels.

The transplanted fat is not alive from the start;

it settles in by receiving nutrients from the surrounding tissue.

During this process, blood flow must be smooth

for the fat to settle stably.

Fat graft survival rate

In other words, it is not simply about how much is left in place;

what matters is how stably it settles.

2. Why does survival rate drop when too much is injected?

When a large amount of fat is injected at once,

a situation can occur where sufficient blood flow

does not reach the inside.

Fat graft survival rate

Even if the outer portion survives,

the inner fat may not receive nutrients and may be absorbed,

or some of it may remain hardened.

In addition, excessive pressure can compress the surrounding tissue,

disrupting blood circulation.

As a result, the overall survival rate may actually decrease,

and the outcome may appear uneven.

3. Why the right injection amount matters

In fat grafting, more important than “how much is injected”

is “how it is divided and injected.”

Left) Before, Right) 2 months later

If an appropriate amount is injected into multiple layers,

the area in which each fat cell can come into contact with blood flow increases.

This helps the survival rate remain stable,

and the overall volume forms naturally.

Left) Before, Right) 2 months later

On the other hand, if too much is injected at once,

the initial volume may look larger,

but over time the amount that decreases can be greater.

4. Criteria for stable results

What matters in fat grafting is

the shape that is ultimately maintained, rather than the initial volume.

1 day after abdominal liposuction / pelvic fat grafting

Therefore, during the procedure, the injection amount and method

must be designed with survival in mind.

Also, after the procedure, it is necessary to avoid excessive pressure or impact

and maintain a stable condition.

When these factors are aligned together,

the volume can be maintained evenly and lead to natural-looking results.

Fat graft survival rate

Fat grafting is not simply a procedure that increases volume;

it is a process that must be designed around survival.

Rather than injecting too much,

what determines satisfaction with the result is creating the right amount

so that it settles stably.

Even by understanding and approaching this standard alone,

you can sufficiently reduce issues such as uneven volume or rapid absorption.

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Fat graft survival rate