The effects of shock wave therapy applied on hypertrophic burn scars: a randomised controlled trial

Sonographic Analysis of CureJet Injection Depth Consistency After Abdominal Stretch Mark Treatment Using Hyperdiluted Calcium Hydroxylapatite

Background

This study investigates the effectiveness and consistency of needle-free jet injectors in administering injections at uniform depths, particularly for the treatment of stretch marks. Ensuring consistent injection depth is crucial for achieving optimal therapeutic outcomes, especially when dealing with challenging skin conditions like stretch marks.

Methods

A retrospective study was conducted involving 25 patients treated for abdominal stretch marks using a needle-free injector (CureJet). For each patient, 10 injection sites were assessed via ultrasound, and the depth of the injections was measured. The mean injection depths and standard deviations were calculated for each patient to assess the consistency of injections. The injected substance was diluted calcium hydroxylapatite, a well-known biostimulatory agent used for skin rejuvenation. Injections were repeated over multiple sessions with consistent parameters to evaluate the reproducibility of the technique.

Results

The mean injection depth across patients was 0.5126 cm, with considerable variability observed between patients. The standard deviation ranged from 0.0326 to 0.2132 cm, indicating significant differences in the consistency of injection depths. The statistical analysis demonstrated that the needle-free injector achieved variable depths, with some injections penetrating deeper than intended, whereas others remained superficial.

Conclusions

While needle-free injectors like CureJet provide a promising alternative to conventional needles, achieving consistent injection depths remains a challenge. This study highlights the need for further refinement in injector technology and technique to improve uniformity in treatment depth, particularly for applications like scar treatment and stretch mark reduction. Enhancing precision in such devices could lead to better patient outcomes and increased safety in aesthetic treatments.

The Role of Extracorporeal Shock Wave Therapy in Keloids and Hypertrophic Scars: A Systematic Review

Keloids and hypertrophic scars are pathological scars that result from a prolonged and aberrant response to wound healing, resulting in raised and thickened skin lesions. Traditional treatments include occlusive dressings, compression therapy, intralesional steroids, and surgical excision with refashioning. Extracorporeal shock wave therapy (ESWT) is a non-invasive treatment method that employs mechanotransduction to stimulate a biological cascade resulting in tissue regeneration. This review aims to explore the literature for published evidence on the role of ESWT in the treatment of keloids and hypertrophic scars. A literature search following the PRISMA guidelines was conducted on PUBMED, Google Scholar, and the Cochrane Database of Systematic Reviews, for studies demonstrating the use of ESWT in keloids and hypertrophic scars. From this, 79 articles were identified, 12 of which met the eligibility criteria and were thus analyzed and included in the study. As monotherapy for keloids, ESWT showed comparable improvements in functional and aesthetic outcomes compared to traditional intralesional steroid therapy. Keloids treated with combination therapy of ESWT with intralesional steroids had better outcomes than those treated with intralesional steroids alone. Improvements in hypertrophic scar cosmesis, discomfort, and function with the use of ESWT were reported. Histologic improvements such as decreased collagen content, reduction of fibrotic markers, and fibrogenic cytokines were also described. ESWT is a promising treatment modality for pathological scars, offering comparable outcomes to traditional therapies with added benefits such as non-invasiveness. Further research is warranted to establish optimal protocols and its role in pathological scar management.

Needle-Free Jet Injection of Poly-(Lactic Acid) for Atrophic Acne Scars: Literature Review and Report of Clinical Cases

Acne scars, particularly atrophic ones, present a persistent challenge in cosmetic medicine and surgery, requiring extended and multifaceted treatment approaches. Poly-(lactic acid) injectable fillers show promise in managing atrophic acne scars by stimulating collagen synthesis. However, the utilization of needle-free injectors for delivering poly-(lactic acid) into scars remains an area requiring further exploration. In this article, a summary of the latest advancements in needle-free jet injectors is provided, specifically highlighting the variations in jet-producing mechanisms. This summary emphasizes the differences in how these mechanisms operate, offering insights into the evolving technology behind needle-free injection systems. The literature review revealed documented cases focusing on treating atrophic acne scars using intralesional poly-(lactic acid) injections. The results of these clinical studies could be supported by separate in vitro and animal studies, elucidating the feasible pathways through which this treatment operates. However, there is limited information on the use of needle-free jet injectors for the intradermal delivery of poly-(lactic acid). Clinical cases of atrophic acne scar treatment are presented to explore this novel treatment concept, the needle-free delivery of poly-(lactic acid) using a jet pressure-based injector. The treatment demonstrated efficacy with minimal adverse effects, suggesting its potential for scar treatment. The clinical efficacy was supported by histological evidence obtained from cadaver skin, demonstrating an even distribution of injected particles in all layers of the dermis. In conclusion, we suggest that novel needle-free injectors offer advantages in precision and reduce patient discomfort, contributing to scar improvement and skin rejuvenation. Further comprehensive studies are warranted to substantiate these findings and ascertain the efficacy of this approach in scar treatment on a larger scale.

Shock Wave Therapy in Plastic Surgery: A Review of the Current Indications

BACKGROUND

Extracorporeal shock wave therapy (ESWT) represents a promising, non-invasive management strategy supporting the treatment of a variety of conditions related to plastic surgery.

OBJECTIVES

This literature review aimed to give a systematic overview of current applications, its mechanism of action, and its potential to provide tangible therapies in plastic surgery.

METHODS

The databases PubMed (National Institute of Health, Bethesda, MD), Embase (via Ovid [Elsevier, Amsterdam, the Netherlands]), and the Cochrane Library (Cochrane, London, UK) were searched for articles published up to June 1, 2021. Clinical studies of any design including ESWT in the context of plastic surgery were included. Two reviewers extracted data, and 46 articles were analyzed after application of the inclusion and exclusion criteria.

RESULTS

Forty-six included studies (n = 1496) were categorized into the following broad themes: cellulite/body contouring/skin rejuvenation, burns/scar treatment, diabetic foot ulcers/chronic wound, and future perspectives of ESWT. Overall, applications of ESWT were heterogenous, and the majority of studies reported effectiveness of ESWT as an alternative treatment technique. Flawed methodology and differences in technical standards limit the outcome and conclusion of this review.

CONCLUSIONS

There is yet insufficient evidence to support the effectiveness of any specific intervention included in this review; however, all included studies reported improvements in key outcomes. Where reported, ESWT displayed a good safety profile with no serious adverse events. Further research is needed to provide more evidence to delineate the indications of ESWT in plastic surgery.

Autologous Scar-Related Tissue Combined with Skin Grafting for Reconstructing Large Area Burn Scar

BACKGROUND

This study introduced a novel method to reconstruct large areas of scarring caused by burns via combining autologous scar-related tissue with spit-thickness skin grafting (ASTCS).

METHODS

25 patients underwent reconstruction after scar resection surgeries around the joints were analyzed between Jan 2012 and Jan 2018. Patient demographics and clinical parameters were collected, autologous scar-related tissue was modified to meshed structure, and the split-thickness skin was acquired from the scalp. The scar was resected and punched by a meshing machine with a thickness of 0.3-0.5 mm at a ratio of 1:1. The secondary wounds were covered by the epidermis from a donor site. The surgical areas were bandaged for 7-10 days before the first dressing change.

RESULTS

25 patients (mean [SD] age, 26.4 [18.8] years; 16 [64%] men) underwent wounds reconstructive operations due to scar resection were reviewed. Wound location of 9 (22%), 8 (19.5%), 9 (22%), 7 (17.1%) and 8 (19.5%) cases were reconstructed in axillary, hand and wrist, popliteal fossa, elbow and neck, respectively. 39 sites of transplanted tissues survived well, and 2 sites were cured after two weeks of dressing changes. Except the analysis of injury causes, nutritional status, wound area and hospital days, patients with scar deformities in joint areas achieved satisfactory function by assessing the Vancouver Burn Skin Score and the Barthel Index Scale Scores after 12-month follow-up.

CONCLUSIONS

Combining autologous scar-related tissue with skin grafting provided a novel method for treating large areas of burn scars with better functional outcomes.

Safety and efficacy of treating post-burn pathological scars with extracorporeal shock wave therapy: A meta-analysis of randomised controlled trials

The clinical application of shockwave therapy has expanded to the treatment of pathological scars. The objective of this systematic review and meta-analysis is to quantitatively evaluate the efficacy and safety of extracorporeal shockwave therapy combined with comprehensive rehabilitation therapy on post-burn pathological scars compared to comprehensive rehabilitation therapy alone. The randomised controlled trials of extracorporeal shockwave therapy for post-burn pathological scars published in English and Chinese languages before October 2021 were included. The methodological quality and risk of bias of the selected articles were assessed with the Cochrane Collaboration's 'risk of bias' tool. RevMan software was applied for data analysis. This is the first systematic review and meta-analysis considering the effectiveness and safety of extracorporeal shockwave therapy on post-burn pathological scars. And nine randomised controlled trials involving 422 patients were included in this meta-analysis. The meta-analysis results showed that, compared with comprehensive rehabilitation therapy alone, extracorporeal shockwave therapy combined with comprehensive rehabilitation therapy was more effective in relieving pain (standardized mean difference [SMD] = -0.59, 95% confidence interval [CI]: [-0.87 to -0.31], p < 0.0001) and pruritus related to pathological scars (SMD = -0.94; 95% CI: [-1.25 to -0.63], p = 0.004), improving scars' appearance (SMD = -1.78, 95% CI: [-3.37 to -0.19], p = 0.03) and elasticity (SMD = 0.25, 95% CI: [0.29-0.21], p < 0.00001), decreasing scars thickness (SMD = -0.13, 95% CI: [-0.25 to -0.01], p = 0.04) and promoting the maturation status of scars (SMD = -2.86, 95% CI: [-3.96 to -1.76], p < 0.00001). There were no reported serious adverse events during and after extracorporeal shockwave therapy in the included studies. Available data preliminarily suggested that the combination of extracorporeal shockwave therapy and comprehensive rehabilitation therapy had better therapeutic effect on post-burn pathological scars than comprehensive rehabilitation therapy alone, without obvious side effects. However, further clinical well-controlled randomised controlled trials are needed. Systematic review registration ID: PROSPERO CRD42022297573.