The clinical approach
Controlled cooling: setpoint, dwell time, applicator footprint
Cold works because adipocytes in the subcutaneous layer crystallize at temperatures the dermis, nerves and vessels above them tolerate at the setpoints and dwell times specified — though transient sensory change in the treated fold is an expected part of that, not a sign something went wrong. Manstein and colleagues at the Wellman Center published the selective cryolysis basis for this in Lasers in Surgery and Medicine in 2008, demonstrating fat loss through intact skin. Four parameters carry the treatment. Setpoint temperature, which on our platform runs 0–15 °C in 1 °C steps. Dwell time, adjustable 1–90 minutes. Vacuum, specified from -0.02 to -0.09 MPa at up to 140 L/min. And applicator footprint — the one buyers forget. A 165 × 81 mm cup and a 128 × 57 mm cup serve very different anatomy, and no software setting rescues you from the wrong handle.
Vacuum matters more than it looks. The suction is what pulls a fold of tissue into the cooling plates and holds it there; without a stable draw, the setpoint on screen isn't the temperature reaching the fat. Check that each handle socket reports its own cooling temperature independently. Four handles sharing one sensor is not four channels.
40 kHz cavitation is not focused ultrasound
Worth separating, because suppliers blur the two constantly. Our engineering archive documents the cavitation handpiece at 40 kHz, a low-frequency band that couples into hypodermal fat. Each cycle swings tissue between positive and negative pressure, forming and collapsing microscopic cavities until cell membranes give way and lipids emulsify into glycerol and fatty acid. The lymphatic system clears the rest.
Focused ultrasound is a different animal. It concentrates energy at a defined focal depth instead of flooding a broad field at low frequency. Moreno-Moraga's group reported a mean fat thickness reduction of 2.28 cm after three focused-ultrasound sessions (Lasers in Surgery and Medicine, 2007). Good data. Just don't quote it while running a 40 kHz handpiece — the mechanism differs, so the numbers do too.
Mono-polar versus bi-polar RF
This distinction decides whether an RF platform belongs on a contouring menu at all. Our technical documentation puts bi-polar penetration at roughly half the gap between its electrodes: shallow, dermal, genuinely useful for tightening, and with almost no fat-lysing effect. Mono-polar reaches deeper, heats more slowly, does act on the fat layer, and needs a return pad under the patient. So if a vendor ships bi-polar tips only and still calls the machine a fat reduction system, ask them for the penetration depth in millimetres. The answer, or the silence, tells you what you need.
The three routes at a glance
| | Controlled cooling | 40 kHz cavitation | Radio frequency |
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| Platform | CR-01 | SM-01 | SM-01 or RF-01 |
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| Mechanism | Adipocytes crystallize and die | Pressure cycles rupture membranes; lipids emulsify | Resistive heating of the dermis, and of fat in mono-polar mode |
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| Layer reached | Subcutaneous fat under intact skin | Hypodermal fat across a broad field | Bi-polar roughly half the electrode gap, dermal; mono-polar deeper, into fat |
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| Key parameters | 0–15 °C in 1 °C steps; 1–90 min; vacuum -0.02 to -0.09 MPa at up to 140 L/min; 165 × 81 mm and 128 × 57 mm cups | 40 kHz; 50 W; 72 mm tip | 2.64 MHz; up to 120 W; mono-polar and bi-polar tips |
|---|
| Time per area | 30–60 minutes of active cooling, unattended once the handle is placed | Hands-on, run as a combined pass with RF | About 20 minutes per body area, hands-on |
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| Course | One placement per area, repeat considered around two months | Several sessions over weeks | 10–12 sessions, twice weekly for a fortnight then weekly |
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| Return pad | No | No | Mono-polar only |
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| Screening specific to it | Cold urticaria, cryoglobulinaemia and related cold conditions | Pacemakers and implanted electronics, epilepsy, kidney stones, serious cardiovascular disease | As cavitation |
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Treatment protocol
Session structure follows the modality, not the brochure. Cold runs as cycles — one placement per area, typically 30 to 60 minutes of active cooling, with a repeat considered around the two-month mark. Cavitation is a course rather than an event: several sessions spread over weeks, usually followed by an RF pass across the same field. Vacuum-roller RF protocols in our archive run about 20 minutes per body area, 10 to 12 sessions in total, twice weekly for the first fortnight and then weekly.
Read those protocol tables closely and you'll notice the parameter taper. On an abdomen, RF power steps down over the session while suction frequency steps up. That isn't arbitrary. It's thermal management — you deposit heat early, then keep tissue moving and drained rather than continuing to load it.
What the published evidence supports
Ingargiola's systematic review in Plastic and Reconstructive Surgery (2015) pooled 19 studies of cryolipolysis and reported average fat layer reduction of 14.67% to 28.5% by caliper and 10.3% to 25.5% by ultrasound measurement. That range is the honest answer. A supplier quoting one flat dramatic figure is selling, not measuring. Photograph and measure your baselines properly, or the follow-up consultation turns into an argument about whether anything happened at all.
Screening, risk, and the paragraph nobody reads
Cavitation and RF are off the table for pacemakers and implanted electronics, epilepsy, kidney stones, and serious cardiovascular disease. Cold is out for cold-related conditions such as cryoglobulinaemia or cold urticaria. Pregnancy rules out all three. Active infection or inflammation in the treatment field, same answer. One upside compared with light-based work: none of these methods target melanin, so Fitzpatrick type is rarely the limiting factor here.
Separate the expected from the rare, because clients conflate them. Hedayati and colleagues reviewed 53 studies for Dermatologic Surgery (2020) and found the most common adverse events after cryolipolysis to be treatment-site erythema, numbness or paresthesia, bruising and edema — minimal in most reports and resolving quickly, with altered sensation in the treated fold the slowest of them to clear. Those are expected reactions, and they belong in the consent conversation as such. The same review lists severe or persistent pain, dysesthesia, hyperpigmentation and motor neuropathy as the serious end, which is where counselling matters rather than reassurance.
One rare complication deserves a line in your consent form. Paradoxical adipose hyperplasia, where treated tissue enlarges instead of shrinking. Nikolis and Enright's multicentre review of 8,658 cycles in 2,114 patients (Aesthetic Surgery Journal, 2021) put the incidence at 0.15% per cycle and 0.43% per patient. Uncommon. Not zero. And it doesn't resolve on its own. Aftercare otherwise stays simple — water, movement, no shower for eight hours after vacuum-RF per our manuals, and transient erythema that our protocol notes typically settle within a few days. Everything on this page is technical information for equipment buyers; it isn't medical advice, and clinical decisions belong to the treating practitioner.
Recommended equipment
Matching the platform to the indication
Three machines cover the contouring menu, and most clinics need two of them at most.
- CR-01 handles cold work. Discrete pinchable pockets where the goal is genuine fat-cell reduction in one or two visits. Four applicators in two sizes, 12.1-inch colour LCD, 1400 W maximum input draw, water plus air plus semiconductor cooling. Pick this when the client points at a specific bulge.
- SM-01 handles broad-area circumference work — thighs, waist, flanks. A 40 kHz cavitation head with a 72 mm tip at 50 W, paired with cooled RF at 2.64 MHz and up to 120 W in mono-polar and bi-polar modes. Compact chassis, so it rolls between rooms.
- RF-01 is the answer when laxity, not volume, is the real complaint. It anchors our skin tightening workflow and pairs naturally with either of the above once volume comes down.
Install, consumables, and the compliance file
Boring section. Read it anyway, because this is where budgets go wrong.
- Power. Built for 220 V or 110 V at 50/60 Hz, ±10%. If your local mains wanders outside that band, you need a regulator rated above 3 kVA, and that's on your quote, not ours.
- Room. 10–30 °C, 20–80% relative humidity, ventilated, out of direct sunlight.
- Water. The cryolipolysis platform is water-cooled. Roughly 1800 mL of distilled water at commissioning, a second fill after the first few minutes of running because the handles and radiator retain some, and a full change about monthly under heavy use. Run it dry and you'll be buying a semiconductor stack.
- Consumables. Antifreeze membranes and petrolatum for cold, coupling gel for ultrasound and RF. Cheap per session, but the membranes are a genuine recurring line — price them before you quote ROI.
- Compliance. Medical electrical equipment in this class is designed against IEC 60601-1 for basic safety and essential performance, with the 60601-1-2 collateral covering electromagnetic disturbance. CE marking and your own national device registration are separate questions again. Ask for the file, not a certificate screenshot, and confirm what your importer needs before the crate ships.
Our service team handles commissioning and operator training; if you want the parameter tables and compliance documentation for a specific configuration, get in touch and we'll send them.