Comparative Evaluation of Clinical Outcomes of Laser Skin Resurfacing Using an Ultra-Pulse Carbon Dioxide Laser and Manual Dermabrasion Using a Medium-Grit Drywall Sand Screen for Scar Revision in Adults: A Split-Scar Prospective Study

Handheld microfocused ultrasound device for facial lifting: A preliminary study of ULTIGHT

OBJECTIVE

Although focused ultrasound modalities have achieved positive clinical results in noninvasive skin rejuvenation, they presented various side effects and particularly severe pain during treatment. This study introduces a microfocused ultrasound (MFU) device, ULTIGHT, to overcome the severe pain issue, providing quasi-facial lifting.

MATERIALS AND METHODS

Transducer surface was imaged with a scanning electron microscope. The energies of four treatment cartridges were measured using an ultrasound power meter. In vitro experiments were performed to quantitatively evaluate the MFU thermal zones (MFUTZs) and treatment line (TL) of 10 MFUTZs. Ex vivo experiments were performed to evaluate the MFUTZs and temperature rise in tissue. Clinical trials using eight volunteers were performed to qualitatively evaluate facial lifting.

RESULTS

The MFU transducer clearly showed a smooth and no air gap surface. ULTIGHT produced 10 discrete MFUTZs in a TL of length 10 mm. In ex vivo tissue, discrete linear MFUTZs were clearly observed at lower number of TLs; however, they started to aggregate at higher number of TLs. The temperature rise was linearly increased as a function of the number of treatments. A single MFUTZ resulted in a temperature rise of 3°C-10°C that could cause hyperthermia for body temperature. In the clinical trials, the volunteers showed quasi-facial lifting right after treatment on the lower facial region.

CONCLUSIONS

ULTIGHT provides relatively low energy, which may be advantageous or disadvantageous depending on clinical applications. Additionally, it has the advantage of being pain-free even without anesthetic during treatment, providing quasi-facial lifting right after treatment.

A Split-Scar Study Investigating the Effectiveness of Early Intervention With Electroabrasion on Improving the Cosmetic Appearance of Postsurgical Scars

BACKGROUND

Electroabrasion, which uses an in-office electrosurgical device, is a method of surgical planning that ablates the skin to the papillary dermis. Several reports demonstrate that intraoperative ablative interventions with lasers or dermabrasion can modulate scar formation more effectively. This investigation uses electroabrasion intraoperatively to mitigate scar formation.

OBJECTIVE

To evaluate the effectiveness of intraoperative electroabrasion for scar revision.

MATERIALS AND METHODS

This was a prospective, randomized, observer-blinded, split-scar study with 24 linear scar segments resulting from primary closures in patients undergoing Mohs micrographic surgery. After placement of dermal sutures, half of the wound was randomly treated with electroabrasion. The other half was used as the control. Scar appearance was assessed by a blinded observer and by the patient using the Patient and Observer Scar Assessment Scale at 1 to 2 weeks, 1 month, and 3 months after surgery.

RESULTS

At the 3-month follow-up, both patient and observer variables measuring scar contour improved on the treated side, whereas erythema was worse. Overall, no difference was seen in total scores between the 2 sides.

CONCLUSION

Based on this pilot study, scars treated with electroabrasion revealed improved surface topography but worsened erythema. Future studies with more refined electrosurgical settings are needed for further evaluation.