Deep cooling characteristics of multi-pulsed cryogen spray: A new technology to assist laser lipolysis
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Deep cooling characteristics of multi-pulsed cryogen spray: A new technology to assist laser lipolysis
- 发表刊物：
- Applied Thermal Engineering
- 摘要：
- Obesity is a fast growing health problem that may induce severe chronic diseases. Laser lipolysis, as an effective
noninvasive treatment, has great potential. Multi-pulsed cryogen spray (MCS) can be used to improve therapeutic
effect, particularly by protecting epidermis and dermis from thermal damage caused by the competitive
absorption of laser energy between dermal water and subcutaneous fat. Epoxy resin was employed as skin
phantom, and surface heat transfer characteristics exposed in deep cooling by continuous and multi-pulsed
cryogen spray were investigated by R134a. Findings indicate that MCS is more suitable for laser lipolysis than
continuous spray given the deeper cooling depth and better cooling efficiency due to the dispersion of the
accumulated liquid film that hinders surface heat transfer. Spatial heat transfer has a large inhomogeneity with
short pulse duration and more homogeneity distribution with long pulse duration. The optimal duty cycle of
0.039 obtained good cooling effect without frostbite given the same pulse durations (Δtp) and number of pulses
(np). The MCS with parametric settings of Δtp = 10 ms, Δtd (pulse delay) ≥ 1500 ms, np ≤ 10 and Δtp = 30 ms,
Δtd ≥ 3000 ms, np ≤ 6 can be used as reference for clinical treatment given their good cooling effect on 2-mm
deep dermis without frostbites.
- 合写作者：
- Hui Xin, Bin Chen,⁎, Zhifu Zhou, Zhaoxia Ying
- 卷号：
- 169
- 是否译文：
- 否
- 发表时间：
- 2020-01-14