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© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Botulinum toxin type A (BoNT-A) injection and micro-focused ultrasound with visualization (MFU-V) are becoming increasingly popular for various esthetic conditions. However, performing MFU-V subsequently to BoNT-A injection may diminish the efficacy of BoNT-A. Previous reports have indicated the impact of various energy-based devices on BoNT-A. Nevertheless, the influence of MFU-V on BoNT-A has yet to be investigated. Thus, this study aims to evaluate the effect of MFU-V on BoNT-A injection and to determine the optimal interval between each treatment. A randomized controlled study was conducted on 15 subjects. Each participant was assigned to receive four sites of intradermal BoNT-A injection on their forehead. Following BoNT-A injection, these locations were randomized to receive either no MFU-V treatment or further treatment with MFU-V (superficial transducer, 10.0 MHz, 1.5 mm) on the same day, Day 7, or Day 14. On Day 28 following injection, the anhidrosis area was measured using the iodine starch test to objectively evaluate the result. In comparison to the control site (1.10 cm2), the anhidrotic area was significantly smaller in all MFU-V treated sites (0.74 cm2 in immediate MFU-V treatment, p < 0.001; 0.90 cm2 in MFU-V Day 7, p = 0.005; 0.93 cm2 in MFU-V Day 14, p = 0.021). There were no serious and esthetic complications reported in our study. In conclusion, MFU-V with a superficial depth transducer significantly reduced the efficacy of intradermal BoNT-A injection, especially within two weeks following BoNT-A injection. After BoNT-A injection, we recommend MFU-V treatment should be avoided for at least two weeks. Further study is required to evaluate the optimal interval between these two treatments.

Details

Title
The Effect of Micro-Focused Ultrasound Treatment on Intradermal Botulinum Toxin Type A Injection
Author
Harnchoowong, Sarawin 1   VIAFID ORCID Logo  ; Jurairattanaporn, Natthachat 2   VIAFID ORCID Logo  ; Vachiramon, Vasanop 2   VIAFID ORCID Logo 

 Division of Dermatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, 270 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand; [email protected] (S.H.); [email protected] (N.J.); Department of Dermatology, Faculty of Medicine, Srinakharinwirot University, Bangkok 10110, Thailand 
 Division of Dermatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, 270 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand; [email protected] (S.H.); [email protected] (N.J.) 
First page
147
Publication year
2025
Publication date
2025
Publisher
MDPI AG
e-ISSN
20726651
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3181822358
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.