Understanding the Role of Physiological Capacity**

During consultations for fat-transfer breast augmentation, patients often ask:

• “Can the breasts be enlarged significantly in just one session?”
• “Why are multiple sessions sometimes required?”

The answer lies in a simple biological fact:

The body has a limit to how much fat can successfully survive after transplantation.

This limit is known as

physiological capacity.

At AVAN TOKYO, we design fat grafting procedures based on this principle to maximize both safety and fat survival.

■ Fat grafting is tissue transplantation

Fat-transfer breast augmentation is not simply injecting volume.

Medically, it is

the transplantation of living fat cells.

The transferred fat cells must:

• obtain blood supply
• integrate with surrounding tissue
• survive as living cells

for the result to be stable.

■ Blood supply is the key to fat survival

For fat cells to survive, they need

oxygen and nutrients from nearby capillaries.

Immediately after injection, however, fat cells are not yet connected to blood vessels.

They temporarily rely on nutrient diffusion from surrounding tissue.

The maximum diffusion distance is approximately

1–2 millimeters.

■ Why large-volume injection can be problematic

If too much fat is injected at once,

the fat in the center may experience

oxygen deprivation.

This can lead to:

• fat necrosis
• calcification
• formation of lumps

In other words,

injecting too much fat can reduce the survival rate.

■ The importance of micro-fat grafting

To prevent this problem, fat must be injected

in small amounts across multiple layers.

This technique is known as micro-fat grafting.

Fat is carefully distributed in layers such as:

• around the mammary gland
• above the muscle fascia
• within the subcutaneous layer

This allows each fat cell to remain close to a blood supply.

■ Why multiple sessions are sometimes needed

There is a physiological limit to the amount of fat that can survive in one session.

For this reason, breast augmentation with fat grafting may sometimes be performed in stages:

• First session: create the foundation
• Second session: increase volume
• Third session: refine the contour

This staged approach allows for

safe enlargement with better long-term results.

■ The AVAN TOKYO approach to fat grafting

At AVAN TOKYO we focus on:

✔ gentle fat harvesting that preserves fat cells
✔ purification of high-quality fat
✔ micro-fat injection techniques
✔ blood-supply–aware graft placement
✔ minimizing the risk of lumps

In fat grafting,

fat survival is more important than injection volume.

Beautiful breast augmentation depends on fat survival

Injecting large amounts of fat at once does not guarantee better results.

What matters most is

respecting the body’s physiological limits.

At AVAN TOKYO, we combine:

• anatomical knowledge
• regenerative medicine concepts
• aesthetic design

to create

soft, natural, and harmonious breast contours.

Fat grafting is not simply enlargement.

It is a process of designing a natural breast shape together with your body.