Cleansing technique using high-velocity steam-air micromist jet spray

Area of Science:

• Biomedical Engineering
• Dermatology
• Microbiology

Background:

• Traditional skin cleansing methods may involve chemicals or lack efficacy in removing certain residues and microbes.
• The need for effective, non-chemical cleansing techniques is growing in both clinical and personal care settings.

Purpose of the Study:

• To propose and evaluate a high-velocity steam-air micromist jet spray (HVS-AMJS) as a novel method for skin cleansing.
• To assess the efficacy of HVS-AMJS in removing residues and reducing microbial load compared to conventional methods.
• To investigate the potential physiological effects, such as massage, of the HVS-AMJS on skin.

Main Methods:

• The HVS-AMJS system utilizes low-pressure steam mixed with compressed air (pH 6.5) sprayed at controlled temperatures (42-46°C) and flow rates (~50 mL/min).
• The spray was applied at a velocity of ≥0.34 m/s from a distance of 5-10 cm.
• Efficacy was tested by removing fluorescent lotion from wood and reducing microbial counts (coliforms, total viable counts) on wood and gauze. Oily ink removal from rat skin was also assessed.

Main Results:

• HVS-AMJS successfully removed fluorescent lotion from wood surfaces, outperforming ultrasonic cleansing and manual rubbing with tap water.
• Significant reductions in coliforms and total viable counts were observed on wood and gauze treated with HVS-AMJS.
• Oily ink was effectively removed from hairless rat skin, with temporary increases in skin temperature and blood flow noted, suggesting massage effects.

Conclusions:

• The HVS-AMJS is a promising chemical-free technology for effective skin and surface cleansing.
• This method demonstrates significant efficacy in removing both chemical residues and microbial contaminants.
• The HVS-AMJS offers dual benefits of cleansing and therapeutic massage, highlighting its potential for diverse applications.