Choosing a liposuction cannula is a sequence of decisions, not a single pick. Who the patient is and what you will do with the fat decide the type of cannula; where you are working decides its diameter, length and modality. This guide sets out that sequence, defines the different kinds of fat, maps where they sit in men and women, and recommends specific CLINIMED cannulas for each area and goal. It is an educational reference for qualified surgeons; the operating surgeon’s judgment always takes precedence.
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Key takeaways
- Decide in order: patient → goal → cannula type → location → safety check.
- Liposuction can only reach subcutaneous fat. Visceral fat is not treatable.
- Men tend to have denser, more fibrous fat (flanks, chest, back); women carry softer fat on hips, thighs and buttocks.
- Removing fat and re-using it for grafting have opposite priorities: contour and safety versus graft viability.
- Near the skin, use 90° ◔ cannulas with the vent turned away from the dermis; keep 360° ● cannulas in the deep layer.
- Plan access sites by Fitzpatrick skin type and scarring history, not by assumed race.
1. The cannula selection hierarchy
- Patient — sex and fat pattern (android or gynoid), tissue texture (soft, fibrous, glandular, lipedema, scarred), skin type and scarring history, skin laxity, volume, primary or revision case.
- Goal — remove (liposuction / debulking, or contouring and high-definition sculpting) or re-use (harvest fat and re-inject it as a graft).
- Cannula type (decided by steps 1 and 2) — extraction arc 90° ◔, 270° ◕ or 360° ●; vent pattern; tip (blunt, spatulated, notched, basket, harvester); smooth or rasping edge.
- Location — decides diameter, length (every CLINIMED cannula is made to order, so length can be specified), modality (syringe, SAL, PAL, ultrasound, laser, water-jet) and hub.
- Safety check — access sites and skin-port protection (Exo-Port), zones of adherence, gluteal fat-grafting rules, hub limits and total volume. A red flag here overrides the earlier steps.
2. What is fat? Definitions
By cell type
White adipose tissue is what liposuction removes and grafting re-uses: each cell holds one large lipid droplet. Brown adipose tissue burns energy to make heat; in adults it sits mainly above the collarbones and in the neck, and is not a liposuction target. Beige fat is white fat that can switch on heat-producing features after cold exposure.
By layer
The superficial fascia (Scarpa’s fascia in the abdomen) divides subcutaneous fat into a compact superficial layer with small lobules and vertical septa, and a looser deep layer with large lobules. The deep layer is the main debulking plane; the superficial layer is for fine sculpting and etching only.
By surgical texture
| Texture | What it is | Cannula implication |
|---|---|---|
| Soft / loose | Large lobules, thin septa — hips, outer thighs, lower abdomen in women | Gentle and high-flow cannulas |
| Fibrous / dense | Thick septa — male flanks, back, upper abdomen, submental fat | Rasping or notched tips first, often with power assistance |
| Glandular (not fat) | Breast gland behind the nipple in gynecomastia | Disrupt, then excise if liposuction alone is not enough |
| Lipedema | Painful, nodular leg fat, mostly in women (about 11% of adult women) | Blunt cannulas, lymph-sparing technique |
| Scarred / revision | Fat bound by scar bands after earlier surgery | Small diameters, rasping and notched tips |
3. Where fat sits in men and women
Men tend to store fat centrally (abdomen, flanks, chest, back) and carry more visceral fat; women store it peripherally (hips, thighs, buttocks). Each zone is coloured by the texture the cannula will typically meet. Hatched areas are zones of adherence — gluteal crease, lateral gluteal depression, distal lateral thigh and middle medial thigh — where liposuction causes contour deformities.
Body-map zones: 1 Submental · 2 Male chest · 3 Upper abdomen · 4 Lower abdomen · 5 Flanks · 6 Upper back · 7 Lower back · 8 Hips · 9 Outer thighs · 10 Inner thighs · 11 Knees · 12 Calves / ankles · 13 Posterior upper arms · 14 Bra roll · 15 Buttocks · 16 Banana roll
4. Removing fat vs re-using it
Remove (liposuction and contouring): the fat is waste; the goal is a smooth, safe contour. More and larger vents remove fat faster but cost more blood — in one lipedema series 8-port cannulas aspirated faster than 4-port cannulas but with greater haemoglobin loss. Keep 360° cannulas deep, finish near the skin with 90° cannulas, and open fibrous tissue before high-flow aspiration.
Re-use (harvesting and grafting): the fat is a graft; the goal is living, undamaged tissue. In a 2026 split-body trial a Ø5 mm cannula with 2.5 mm fenestrations caused the least graft damage, while 1 mm holes caused the most. Keep vacuum low, match the harvester’s parcel size to the recipient site, and re-inject with blunt cannulas. In the buttocks, inject only into the subcutaneous plane with a rigid, blunt, single-hole cannula larger than 4.1 mm.
5. How CLINIMED names a cannula
Every CLINIMED name carries its definition — for example Single (Wedge), 1x1 vent cannula w/ spatulated tip, 90° of extraction: the family name, the vent pattern (rows along the shaft × positions around it), the tip, and the extraction arc: 90° ◔ (one side, directional), 270° ◕ (three sides) or 360° ● (all round). For more detail see our guide to liposuction cannula tip types.
6. Recommendations by area — removing fat
Need help matching a cannula to your handpiece? See how to choose a cannula hub and the cannula size and diameter chart.
7. Recommendations by recipient — re-using fat
| Recipient | Harvest with | Re-inject with |
|---|---|---|
| Skin quality (nanofat) | CLINIMED NANO 500 µm; A. Trivisonno nano; R. Bensimon nano; G. Sattler 6x4 | S. Coleman “NANO” Fig. 1, Ø0.64–0.9; PURE™ Nano Fat hub |
| Face volume (microfat) | CLINIMED MICRO 1000 µm; P. Tonnard 5x4 | S. Coleman Fig. 1, Ø0.9–1.2 — Facial Fat Transfer Set |
| Breast | CLINIMED MILLI; J. Sørensen 4x3; H. Becker basket | S. Coleman Fig. 2 or S. Coleman Fig. 3, Ø2–3 — Breast Augmentation Set |
| Buttocks and hips | CLINIMED MACRO; M. Sforza 5x4; H. Becker basket Ø4–5 | Rigid, blunt, single-hole cannula larger than 4.1 mm, subcutaneous only |
8. Patient modifiers
Men: open fibrous flanks, back and chest with rasping or notched tips before high-flow cannulas; use longer cannulas and power assistance. Women: soft gynoid fat suits 270° and 360° cannulas at Ø4–5, finished at Ø3; be conservative on inner thighs and arms; consider lipedema when leg fat is painful and nodular. Skin type: Fitzpatrick IV–VI skin is more prone to hyperpigmentation and keloids — use fewer, smaller, well-hidden access sites, longer cannulas and skin ports such as Exo-Port to protect the incisions.
Frequently asked questions
What size liposuction cannula should I use for the neck?
Typically Ø1.5–3 mm and 10–15 cm long. For the superficial layer a 90° cannula such as the Single (Wedge) 1x1 with a spatulated tip lets you turn the vent away from the skin; keep 360° cannulas such as the Mercedes 1x3 in the deep plane.
Which cannula is best for fibrous fat or gynecomastia?
Rasping or notched cannulas — Rasping 3x1, L. Toledo “W” notch — open dense tissue, ideally with power-assisted liposuction, before aspiration with a Mercedes 1x3. The glandular disc may still need excision.
What cannula should be used for gluteal fat grafting?
Safety task forces recommend injecting only into the subcutaneous plane with a rigid, blunt, single-hole cannula larger than 4.1 mm, never angled downward, and only while the cannula is moving.
Does cannula diameter affect fat graft survival?
The evidence is mixed. A 2026 trial found larger cannulas with wider fenestrations caused the least graft damage, while a 2022 trial found neither factor decisive; vacuum and processing matter as much.
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Educational reference for qualified surgeons; not a substitute for clinical judgment or the instructions for use. Full references are listed in the PDF. MicroAire®, PAL®, Nouvag®, VASER®, Alma® and BeautiFill® are trademarks of their respective owners.