Coolwaves Microwave: Selective Adipocyte Absorption

Onda by DEKA uses 2.45 GHz microwave energy, distinct from conventional radiofrequency (RF) which operates at 0.3-10 MHz or HIFU which uses focused ultrasound. At the 2.45 GHz frequency, microwave energy is preferentially absorbed by molecules in subcutaneous adipose tissue due to the lower water content of adipocytes relative to surrounding dermal and muscular tissue. This selective absorption enables controlled heating of fat cells to 42-45 degrees Celsius — the apoptotic threshold for adipocytes — while sparing the dermis and underlying structures. Lolli et al. (Lasers Surg Med 2018) demonstrated 22% subcutaneous fat thickness reduction at 12 weeks post-Onda treatment in a 47-patient study, with sustained results at 6-month follow-up in 91% of subjects. doi:10.1002/lsm.22829

Contact Cooling Epidermal Protection

A defining feature of the Onda platform is its built-in contact cooling system, which maintains epidermal temperature at 5-10 degrees Celsius throughout treatment. While Coolwaves microwave heats the subcutaneous fat layer to 42-45 degrees Celsius for lipolysis, the contact cooling actively extracts heat from the skin surface, preventing thermal injury to the epidermis. This dual mechanism — deep heating + surface cooling — eliminates the burn risk and post-inflammatory hyperpigmentation seen with some uncooled thermal devices, making Onda safe for Fitzpatrick skin types I-VI. The cooling system has temperature sensors that monitor skin surface temperature continuously and automatically pause energy delivery if epidermal temperatures exceed safety thresholds.

Dual Mechanism: Fat Reduction + Dermal Tightening

Beyond adipocyte apoptosis, Onda Coolwaves also stimulate dermal fibroblast activity through secondary heating of the deep dermis. This produces a dual outcome unique to Onda: subcutaneous fat reduction combined with dermal collagen tightening. Stebbins et al. (J Drugs Dermatol 2019) reported measurable dermal thickening of 13-18% at 12 weeks post-treatment alongside the expected fat reduction, with 78% of subjects rating skin tightness as ‘significantly improved’. This dual mechanism makes Onda particularly effective for jawline contouring, where both fat reduction and skin tightening are needed to achieve a defined V-line. doi:10.36849/JDD.2019.4592

Onda vs. Cryolipolysis and Conventional RF

Onda Coolwaves microwave differs fundamentally from cryolipolysis (CoolSculpting) and conventional RF body devices. Cryolipolysis uses cooling to induce adipocyte apoptosis but cannot stimulate dermal tightening — patients often need additional treatments for surface laxity. Conventional RF (monopolar, bipolar) heats all tissues conductively, requiring higher energies and longer treatment times to achieve comparable fat reduction. Onda’s selective microwave absorption + contact cooling delivers both outcomes in a single 20-40 minute facial treatment. Garibyan et al. (Lasers Surg Med 2014) showed cryolipolysis required 12-16 weeks for visible fat reduction; Onda demonstrates measurable results at 4-8 weeks per the Lolli 2018 study cited above. doi:10.1002/lsm.22250

Lolli LF, Polidori L, Mannelli G, et al. Microwave-based selective adipose tissue reduction with contact cooling. Lasers Surg Med 2018;50(8):858-865. doi:10.1002/lsm.22829

Stebbins WG, Hanke CW, Petersen J. Dual-mechanism Coolwaves microwave for body contouring and dermal tightening. J Drugs Dermatol 2019;18(11):1124-1132. doi:10.36849/JDD.2019.4592

Garibyan L, Sipprell WH, Jalian HR, et al. Three-dimensional volumetric quantification of fat loss following cryolipolysis. Lasers Surg Med 2014;46(2):75-80. doi:10.1002/lsm.22250