Ablative Fractional Laser Research Articles

A split-face study of moisturizer containing Centella asiatica extract after ablative fractional carbon dioxide laser resurfacing

A split-face study of moisturizer containing Centella asiatica extract after ablative fractional carbon dioxide laser resurfacing

The influence of skin barrier impairment on the iontophoretic transport of low and high molecular weight permeants

The effect of skin barrier impairment on the iontophoretic transport of low (acetaminophen (ACM), lidocaine (LD), ketorolac (KT)) and high molecular weight permeants, (cytochrome c (Cyt c) and ribonuclease T1 (RNase T1)), was evaluated using tape-stripping (TS) and fractional laser ablation for “large-scale” and “localized” barrier disruption. Interestingly, removal of the stratum corneum did not invariably lead to an increase in iontophoretic delivery of the permeants. Decrease of electroosmotic (EO) flow and facilitated transport of Cl- ions in the cathode-to-anode direction, which reduced cation electromigration (EM), both impacted cation delivery by anodal iontophoresis but the effects were partly offset by enhanced passive diffusion. Decrease in EO increased cathodal iontophoresis of KT but not that of RNase T1. Permeability coefficients confirmed the superiority of EM over EO for small molecules, LD > KT > ACM. A combination of fractional laser ablation and iontophoresis was advantageous for both positively and negatively charged small molecules as passive penetration was significantly enhanced. In conclusion, results demonstrated that (i) skin ablation prior to anodal iontophoresis decreased EO and EM but could be advantageous for delivery if the ablative technique enhanced passive penetration thereby compensating reduction of electrotransport and (ii) reduced EO favored cathodal electrotransport.

Vaccine delivery alerts innate immune systems for more immunogenic vaccination.

Vaccine delivery technologies are mainly designed to minimally invasively deliver vaccines to target tissues with little or no adjuvant effects. This study presents a prototype laser-based powder delivery (LPD) with inherent adjuvant effects for more immunogenic vaccination without incorporation of external adjuvants. LPD takes advantage of aesthetic ablative fractional laser to generate skin microchannels to support high-efficient vaccine delivery and at the same time creates photothermal stress in microchannel-surrounding tissues to boost vaccination. LPD could significantly enhance pandemic influenza 2009 H1N1 vaccine immunogenicity and protective efficacy as compared with needle-based intradermal delivery in murine models. The ablative fractional laser was found to induce host DNA release, activate NLR family pyrin domain containing 3 inflammasome, and stimulate IL-1β release despite their dispensability for laser adjuvant effects. Instead, the ablative fractional laser activated MyD88 to mediate its adjuvant effects by potentiation of antigen uptake, maturation, and migration of dendritic cells. LPD also induced minimal local or systemic adverse reactions due to the microfractional and sustained vaccine delivery. Our data support the development of self-adjuvanted vaccine delivery technologies by intentional induction of well-controlled tissue stress to alert innate immune systems for more immunogenic vaccination.

Combined Treatment of Rolling Acne Scars in Ethnic Skin Using Extensive Subcision, Trichloracetic Acid Peel, and Fractional Ablative Erbium Laser.

BACKGROUNDSuccessful treatment of acne scars in ethnic skin requires procedures that are safe and effective with a low incidence of hyper or hypopigmentation postoperatively.OBJECTIVEIn this study, the safety and efficacy of a combined treatment protocol including tumescent anesthesia, subcision, trichloracetic acid peel, and fractional erbium laser resurfacing was evaluated.METHODSThis is a retrospective study of 56 patients (22 women and 34 men) with predominantly rolling acne scars and Fitzpatrick skin Types IV–VI who were treated using a combination of tumescent anesthesia, extensive subcision, fractional ablative erbium laser, and a blending 20% trichloracetic acid (TCA) peel.RESULTSThe mean improvement after a single treatment, assessed by 3 independent evaluators (2 dermatologist and 1 dermatology physician assistant), was 2.52 (SD = 1.04) on a scale of 1 to 4.CONCLUSIONThe combination of tumescent anesthesia, extensive subcision, fractional ablative erbium laser resurfacing, and a blending 20% TCA peel (combined procedure) is both safe and effective in the treatment of rolling acne scars in ethnic skin types with acceptable temporary adverse effects.

29 The Effectiveness of Laser Therapy for Hypertrophic Burn Scars in Pediatric Patients: A Prospective Investigation

Abstract Introduction Laser therapy has emerged as a valuable treatment option for hypertrophic burn scars over the past decade. Improvements in scar symptoms have been found using the ablative fractional carbon dioxide laser (AFCL) as well as the pulsed dye laser (PDL). However, research regarding the use of laser therapy among pediatric burn patients remains limited. Thus, the aim of this study was to investigate the effectiveness of using laser therapy to improve hypertrophic burn scars in a pediatric population using a comprehensive set of subjective and objective scar assessment tools. Methods A single-center, prospective observational study was carried out at a tertiary pediatric hospital. Twenty participants with hypertrophic burn scars that had not received previous laser treatment were included. Laser procedures were administered at approximately two-month intervals and each participant attended five study visits over the course of one year. A comprehensive set of scar assessment tools including the Vancouver Scar Scale, the Patient and Observer Scar Assessment Scale, conventional ultrasound, ultrasound elastography, and a multi-parameter skin analysis device were used to evaluate scar properties at each study visit. Results Seventy-one laser procedures were carried out with most participants receiving treatment with both the AFCL and the PDL at the same session (83%). All participants underwent at least three laser procedures with no complications noted. From baseline to study completion, statistically significant improvements in all scar measures, both subjective and objective, were observed (p < 0.05). More specifically, improvements in overall scarring and in specific scar properties including thickness (p < 0.05), stiffness (p < 0.05), and color (p < 0.05) were found. Conclusions To our knowledge, this is the most comprehensive study to date to evaluate the effect of laser treatment on hypertrophic burn scars in a pediatric population. Our findings suggest that laser therapy is a highly beneficial treatment for burn-injured children that should be integrated into current scar treatment practices. In addition to obtaining strong evidence to support the use of laser therapy, we utilized rigorous scar assessment and laser treatment protocols that can be easily adopted by other clinicians.

The Rise and Fall of the Pale Puffy Lower Eyelid Pillow.

This case series demonstrates an exaggerated form of the clinical presentation of a known distressing late complication of retained hyaluronic acid filler – the “pale puffy pillow.” This presentation is often, unfortunately for the patient, misdiagnosed as festoons. However, the correction with liberal hyaluronidase is simple. Additionally, we have demonstrated that ablative fractional carbon dioxide laser resurfacing is an excellent tool that may be utilized after hyaluronidase to correct the residual skin laxity.J Drugs Dermatol. 20(4):475-476. doi:10.36849/JDD.5509.

Laser-Assisted Hyaluronic Acid Delivery by Fractional Carbon Dioxide Laser in Facial Skin Remodeling: AProspective Randomized Split-Face Study in France.

Combining the efficacy of ablative fractional carbon dioxide lasers (AFXL) to laser-assisted hyaluronic acid delivery (LAHAD) has not yet beenstudied. The objective of our study was to evaluate the safety and the efficacy of laser-assisted hyaluronic acid (HA) delivery with AFXL in facial skin remodeling. We conducted a prospective, double-blinded, randomized split-face studyon 20 patients from 30 to 70 years old, with a skin phototype from I to IV. Each patient received full-face treatment with AFXL, immediately followed by the application in droplets into the fractional ablative tunnels of 1 mlof HA gel on one hemifaceand 1 mlof physiological saline on the other hemiface. To evaluate postlaser aftermath, the intensity of erythema, edema, and crusts was graded. To assess facial skin remodeling, we scored the improvement of skin texture, firmness, fine lines, and skin radiance from baseline. Patients were evaluated on the3rdand 7thday, 1stand 3rdmonth using clinical evaluations, photographs, and patient questionnaires. We showed equivalence in postlaser aftermath between HA-treated and nontreated hemiface. Trend data analyses at the 3rdmonth suggested that immediate application of HA after AFXL resulted in a greater improvement in facial skin remodeling, especially for skin texture (mean score of 2.60 vs. 2.45) and skin firmness (mean score of 2.55 vs. 2.40). Skin radiance showed the best improvement, reaching almost a score of 5/10. LAHAD with AFXL is a safe treatment showing promising results in facial skin remodeling. These findings need to be confirmed by a larger study to evaluate the value of LAHAD in daily clinical practice. Lasers Surg. Med. © 2021 Wiley Periodicals LLC.

Split-face comparative study of fractional Er:YAG laser versus microneedling radiofrequency in treatment of atrophic acne scars, using optical coherence tomography for assessment.

Efficacy and safety of ablative fractional laser used for treatment of acne scars have been described in several studies. Recently, microneedling radiofrequency treatment has been showing promising results with low risk of side effects and rapid healing time. To study efficacy and safety of ablative fractional Er:YAG laser 2940nm and microneedling radiofrequency for facial atrophic acne scar. 21 patients with atrophic postacne scars were randomized to MRF for one half of the face and laser for the other half. Four sessions were performed monthly. For evaluation, the validated scale "Quantitative Global Grading System for Postacne Scarring" and patient's satisfaction were used before and 3months after treatment. Optical coherence tomography imaging of the skin was used as an objective tool for assessment. Both sides showed significant improvement on clinical evaluation with no significant difference. Optical coherence tomography assessment showed significant increase of both epidermal and dermal thickness compared to baseline. Both MRF and ablative fractional Er. YAG laser 2940nm are effective in the treatment of post acne scars. Microneedling radiofrequency is better tolerated, with lower downtime and fewer side effects.

Fractional Erbium-Doped Yttrium Aluminum Garnet Laser in the Treatment of Primary Cutaneous Amyloidosis.

Although various treatments are currently available for primary cutaneous amyloidosis (PCA), there is no entirely satisfactory treatment. Recently, fractional ablative lasers are claimed to have therapeutic effects for PCA. To evaluate the efficacy and safety of fractional Er:YAG laser for the treatment of PCA. Ten patients with macular and lichen amyloidosis received 4 treatment sessions with 4-week intervals. The outcome was assessed clinically (degree of pigmentation, rippling, lichenification, and itching) through photographs and histologically (amount of amyloid, melanin, epidermal thickness, and depth of rete ridges) through biopsy specimens stained with hematoxylin-eosin, Congo red, and Fontana-Masson stain. Patients were followed up for 3 months after the final treatment. At 3-month follow-up, fractional Er:YAG laser exhibited a significant clinical and histological improvement. Patient satisfaction concurred with physicians' evaluations. Recurrence was detected in 1 patient. In light of the authors' findings, fractional Er:YAG laser offered a great clinical and histological efficacy with excellent safety profile. Careful laser selection based on making a compromise between efficacies and safeties may improve outcome.

Pretreatment with ablative fractional carbon dioxide laser improves treatment efficacy in a synergistic PDT protocol for actinic keratoses on the head.

A recently proposed synergistic photodynamic therapy protocol (s-PDT) combining advantages of both conventional- and daylight-PDT proved to be an effective and almost painless treatment for patients with actinic keratoses (AKs). This study investigated the safety and efficacy of an additional ablative fractional CO2-laser (AFXL) pretreatment. 28 patients with AKs on the head received s-PDT using 5-aminolevulinic acid. AFXL pretreatment was conducted using the following parameters: pulse energy 8 mJ, spot density 50 spots/cm2, power 30 W, beam size 4-18 mm. Outcome was assessed by AK area and severity index (AKASI) and lesion count (LC) before and 3 months after treatment. Safety was monitored by blood pressure and pulse measurements. Intensity of pain was determined by use of a visual analog scale (VAS). Most patients (96.4 %) showed a significant AKASI reduction (P < 0.0001) 3 months after PDT (median AKASI 1.6 [0-2.4]) compared to baseline (5.3 [4-7.75]). Median reduction rate was 75.5 % (61.3 %-100 %). Eleven patients (39.3 %) achieved AKASI 100, three (10.7 %) AKASI 75 and ten (35.7 %) AKASI 50. Blood pressure and pulse did not change significantly throughout treatment. Median VAS for pain during irradiation was 0 (0-0), 0 (0-2) and 0 (0-2) at the beginning, in the meantime and at the end, respectively. Compared to data without AFXL pretreatment, this study showed significantly higher AKASI and LC reduction rates (75.5 % vs. 63.7 % [P = 0.023] and 91.3 % vs. 80.4 % [P = 0.043]). S-PDT with AFXL pretreatment represents a safe and almost painless treatment for patients with AKs on the head and improves treatment efficacy.

The Rise and Fall of the Pale Puffy Lower Eyelid Pillow

This case series demonstrates an exaggerated form of the clinical presentation of a known distressing late complication of retained hyaluronic acid filler – the “pale puffy pillow.” This presentation is often, unfortunately for the patient, misdiagnosed as festoons. However, the correction with liberal hyaluronidase is simple. Additionally, we have demonstrated that ablative fractional carbon dioxide laser resurfacing is an excellent tool that may be utilized after hyaluronidase to correct the residual skin laxity.J Drugs Dermatol. 20(4):475-476. doi:10.36849/JDD.5509

Pulsed dye laser versus ablative fractional CO2 laser in treatment of old hypertrophic scars: Clinicopathological study.

There is a continuous need to find out the best treatment for old hypertrophic scars (OHSs). Thirty patients with OHSs were included. Each scar was divided into right half treated with PDL (handpiece with a 7-mm spot, pulse duration of 1.5 ms and fluence of 6 J/cm2 ) and left half treated with FrCo2 laser (15 W, spacing 800 μm, dwelling time 600 μs and stack 3) once every month for three sessions. Scars were assessed before and after treatment clinically by Vancouver Scar Scale (VSS) and histologically using hematoxylin and eosin (H&E), Masson trichrome and orcein stains. Both halves showed statistically significant improvement after treatment. However, there was no statistically significant difference in VSS between them (P = 0.176). FrCo2 laser showed more significant improvement in pliability and height (Pp = 0.017, Ph = 0,011), while, PDL showed more significant improvement in vascularity (P = 0.039) of OHSs. Both PDL and ablative FrCo2 laser were effective in the treatment of OHSs, however, FrCo2 laser was more effective in improving OHSs pliability, and height which are the main concern in OHSs.

Pulse-Dye Laser Followed by Betamethasone-Calcipotriol and Fractional Ablative CO2-Laser-Assisted Delivery for Nail Psoriasis.

Nail psoriasis is a common and potentially debilitating condition for which no effective and safe nonsystemic therapy is currently available. Recently, laser-assisted drug delivery (LADD) is being increasingly used to facilitate transcutaneous penetration of topical treatments. We set to assess the efficacy and safety of combined pulse-dye laser and fractional CO2 laser-assisted betamethasonecalcipotriol gel delivery for the treatment of nail psoriasis. We conducted a prospective, intrapatient comparative study in a series of 22 patients with bilateral fingernail psoriasis. Nails on the randomized hand were treated with 3 monthly sessions of pulse-dye laser to the proximal and lateral nail folds followed by fractional ablative CO2 laser to the nail plate. Between treatments and one month following the last treatment, the participants applied betamethasone propionate-calcipotriol gel once daily to the nail plate. Clinical outcome was ascertained using nails photography, the Nail Psoriasis Severity Index (NAPSI) and patient satisfaction. Seventeen completed the study. Three participants withdrew from the study because of treatment-associated pain. Treatment was associated with a statistically significant improvement of the NAPSI scale (p < .002). Patient satisfaction was high. Combined PDL and fractional ablative CO2-LADD of betamethasone-calcipotriol gel should be considered for the treatment of nail psoriasis.

Patient Satisfaction and Management of Postoperative Complications Following Ablative Carbon Dioxide Laser Resurfacing of the Lower Eyelids.

To describe postoperative management following ablative carbon dioxide laser resurfacing of the lower eyelids. A retrospective review of patients who consecutively underwent bilateral lower eyelid ablative carbon dioxide laser resurfacing by a single experienced oculoplastic surgeon over a 6-year period was conducted. Patient satisfaction, aesthetic outcomes, and postoperative complications were evaluated as adjunctive or monotherapy. Among 424 patients included in the study, most were female (n = 356, 84.0%) and Caucasian (n = 404, 95.3%), with Fitzpatrick skin types II-III (n = 381, 89.9%). Mean age was 62.8 years (standard deviation: 9.7 years). Most (n = 324, 76.4%) underwent fractional ablative carbon dioxide laser resurfacing of the lower eyelids, whereas 91 (21.5%) received traditional laser resurfacing and 9 (2.1%) had both fractional and traditional laser resurfacing during the same session. At the time of lower eyelid laser resurfacing, most patients also underwent concurrent procedures, including upper (n = 321, 75.7%) and lower blepharoplasty (n = 348, 82.1%); a small proportion of patients (n = 39, 9.2%) did not undergo any concurrent surgical procedure. In addition to ablative laser resurfacing of the lower eyelids, 25 (5.9%) had upper eyelid laser resurfacing, 60 (14.2%) had full-face laser resurfacing, 55 (13.0%) had neck laser resurfacing, and 42 (9.9%) had additional treatment of solar lentigines or dyschromias on the face. Median follow-up duration was 3.9 months (interquartile range: 2.0-11.0 months). In the immediate postoperative period, 22 patients (5.2%) developed contact dermatitis from topical antibiotic eye drops and/or ointment prescribed postblepharoplasty. Postinflammatory hyperpigmentation was observed in 40 patients (9.4%) despite topical prophylaxis; all were eventually successfully treated with a combination of topical nonprescription and prescription creams and/or oral tranexamic acid. A localized herpetic outbreak occurred in 3 (0.7%) who underwent full-face laser resurfacing and 1 (0.2%) who underwent periocular laser resurfacing only; all were successfully treated with oral antiviral therapy. Two (0.5%) developed culture-proven atypical mycobacterial infection of the resurfaced lower eyelid skin and were treated with combination antibiotic therapy for several months until resolution. A small scar was noted in 4 patients (0.9%), which resolved after local corticosteroid injections. No patient developed persistent scarring or ectropion. Patient satisfaction was overall high, with 363 (85.6%) very satisfied and 48 (11.3%) satisfied with the aesthetic outcome of lower eyelid laser resurfacing. Ablative carbon dioxide laser resurfacing of the lower eyelids can be a useful tool in the armamentarium of the experienced oculoplastic surgeon, with excellent aesthetic results, high patient satisfaction, and low complication rates as adjunctive or monotherapy. Proper and timely management of postoperative complications is essential to maximizing successful cosmetic outcomes.

Facilitated delivery of topical steroids after fractional ablative carbon dioxide laser failed to prevent the postthyroidectomy hypertrophic scar

Background: The ablative fractional laser can destroy the epidermal barrier and enhance the infiltration and distribution of drugs into the dermis. Objectives: This study was designed to investigate whether steroid delivery followed by the fractional ablative laser can prevent the formation of postthyroidectomy scar. Methods: This prospective split-scar design study recruited 12 adult female patients who underwent thyroidectomy between March 2018 and December 2018. The whole scar was treated with a fractional ablative carbon dioxide laser with topical 0.05% clobetasol propionate ointment only applied on the treatment side. The Patient and Observer Scar Assessment Scale (POSAS) questionnaire was used for outcome assessment at 1 year following the first treatment. The follow-up assessment by scar esthetic scale using digital photographs at 6 months and 1 year after first treatment was also done by three blinded plastic surgeons. Results: The POSAS revealed the improvement was not significant on vascularity, pigmentation, thickness, relief, pliability, surface area, and overall opinion on the improvement (all P > 0.05). The digital photographs evaluation also did not reveal a significant difference between the treatment side and control side. The overall esthetic score in the assessment of digital photographs was 4.4 ± 1.5, 4.2 ± 1.9, and 3.4 ± 1.9 at 6 months, and 2.8 ± 1.9, 3.1 ± 1.9, and 2.4 ± 2.1 at 1 year, with 0–10 indicating totally identical to significantly different comparing the whole scar with surrounding normal skin. Conclusion: This prospective scar-split study revealed that the application of topical steroid after fractional ablative carbon dioxide laser has no significant effect to prevent the formation of postthyroidectomy scar.

Bleomycin administered by laser-assisted drug delivery or intradermal needle-injection results in distinct biodistribution patterns in skin: in vivo investigations with mass spectrometry imaging

Bleomycin (BLM) is being repositioned in dermato-oncology for intralesional and intra-tumoural use. Although conventionally administered by local needle injections (NIs), ablative fractional lasers (AFLs) can facilitate topical BLM delivery. Adding local electroporation (EP) can augment intracellular uptake in the target tissue. Here, we characterize and compare BLM biodistribution patterns, cutaneous pharmacokinetic profiles, and tolerability in an in vivo pig model following fractional laser-assisted topical drug delivery and intradermal NI, with and without subsequent EP. In vivo pig skin was treated with AFL and topical BLM or NI with BLM, alone or with additional EP, and followed for 1, 2 and 4 h and eventually up to 9 d. BLM biodistribution was assessed by spatiotemporal mass spectrometry imaging. Cutaneous pharmacokinetics were assessed by mass spectrometry quantification and temporal imaging. Tolerability was evaluated by local skin reactions (LSRs) and skin integrity measurements. AFL and NI resulted in distinct BLM biodistributions: AFL resulted in a horizontal belt-shaped BLM distribution along the skin surface, and NI resulted in BLM radiating from the injection site. Cutaneous pharmacokinetic analyses and temporal imaging showed a substantial reduction in BLM concentration within the first few hours following administration. LSRs were tolerable overall, and all interventions permitted almost complete recovery of skin integrity within 9 d. In conclusion, AFL and NI result in distinct cutaneous biodistribution patterns and pharmacokinetic profiles for BLM applied to in vivo skin. Evaluation of LSRs showed that both methods were similarly tolerable, and each method has potential for individualized approaches in a clinical setting.

Combination Treatment of Intra/Perilesional Botulinum Toxin-A Injection and Ablative Fractional Laser for Better Clinical Outcomes of Hypertrophic Fibrotic Thyroidectomy Scars Following Fractional Ablative Laser Resurfacing.

BackgroundRecent reports have shown that intralesional botulinum toxin type-A (BTX-A) works on scar cosmesis.ObjectiveTo evaluate the clinical efficacy of combination treatment of laser and BTX-A injection and compare the effects of conventional intralesional injection and intra- and perilesional BTX-A injection on fibrotic thyroidectomy scars.MethodsPatients with fibrotic thyroidectomy scars showing insufficient responses to previous ablative fractional laser (AFL) treatment were enrolled. Combination treatment with AFL and BTX-A injection was performed. Patients who received intra/perilesional BTX-A injections were classified into group A. Group B was patients in whom the injection was performed only intralesionally. The improvement was assessed based on the Vancouver Scar Scale (VSS).ResultsA total of 24 patients was included. Statistically significant improvement in pliability and total VSS score after the combination treatment were observed in overall patient group. Subgroup analysis demonstrated that pliability, height, and total VSS improved significantly in group A. In group B, only pliability significantly improved.ConclusionBTX-A injection combined with AFL can provide better relief for the previously treated fibrotic thyroidectomy scars. Injection of BTX-A not only into the scar itself, but also into perilesional muscles that can exert tension on the scar site may provide additional benefit in flattening scar height.

Combination of ablative fractional carbon dioxide laser and platelet-rich plasma treatment to improve hypertrophic scars: a retrospective clinical observational study.

BackgroundHypertrophic scars are one of the main complications that affect the quality of life of patients after burns. Many methods have been shown to be effective in the treatment of hypertrophic scars, such as ablative fractional CO2 laser (AFCL) and platelet-rich plasma (PRP). However, there are few studies on the effect of the combined application of these measures. The purpose of this study was to explore the therapeutic effect of AFCL combined with PRP on hypertrophic burn scars.MethodsA retrospective clinical observation study was conducted on 50 patients with hypertrophic burn scars. The AFCL+PRP group included 31 patients who received AFCL combined with PRP treatment; the AFCL group included 19 patients who received AFCL treatment only. The University of North Carolina 4P Scar Scale (UNC4P) and the Vancouver Scar Scale (VSS) scores that were collected before each treatment were used as indicators of the effectiveness of the previous treatment. The scores recorded at the second, fourth and seventh months were analysed.ResultsThe demographic data of the 2 groups were not significantly different. Before treatment, there was no difference in the UNC4P and VSS scores between the 2 groups. There was a significant decline in the UNC4P and VSS total scores over 6 months in both groups (p < 0.05) and scores in the 2 groups were comparable after 3 and 6 months (p < 0.05). UNC4P scores in the AFCL+PRP group decreased from a mean of 8.26 to 2.61 (p < 0.05) with a concomitant drop in VSS scores from a mean of 11.74 to 6.06 (p < 0.01). In the AFCL group UNC4P and VSS scores decreased from 7.68 to 4.63 (p < 0.05) and from 10.89 to 8.16 (p < 0.05), respectively. The sub-items of these 2 assessments were analysed and the results suggest that AFCL combined with PRP can comprehensively improve scarring.ConclusionsThis study shows that PRP is an effective adjunct for AFCL in the treatment of hypertrophic burn scars and that the combination of PRP and AFCL proved to be more useful than AFCL alone. This combination may be a new and effective clinical practice for the treatment of scars. However, larger and higher-level clinical studies are still needed to determine its efficacy and possible mechanisms.

Ablative fractional CO2 laser surgery improving sleep quality, pain and pruritus in adult hypertrophic scar patients: a prospective cohort study.

BackgroundPoor sleep quality is associated with a decrease in quality of life in patients with major burn scars, combined with pruritus and pain. Few interventions have been reported to improve the sleep quality of patients with scars. In the current prospective cohort study, we investigated the efficacy of CO2-ablative fractional laser (AFL) surgery vs conventional surgery in post-burn patients with hypertrophic scars with sleep quality as the primary study outcome.MethodsIn total 68 consecutive patients undergoing scar surgical treatment were recruited, including a CO2-AFL surgery cohort (n = 35) and a conventional surgery cohort (n = 33). A subgroup from the AFL cohort was selected. Sleep quality, pain and pruritus were evaluated. Multiple linear regression analyses were performed to reveal the effect of CO2-AFL surgery.ResultsThe CO2-AFL surgery cohort had significantly lower Pittsburgh sleep quality index (PSQI) global scores than the conventional surgery cohort after the last surgical treatment. In the subgroup of patients receiving hardware sleep monitoring, CO2-AFL markedly increased deep sleep time, deep sleep efficiency and reduced initial sleep latency. Compared to the conventional surgery cohort, the CO2-AFL cohort presented significantly lower pain and pruritus scores. Correlation analysis showed pain and pruritus were significantly associated with PSQI scores, and there were also significant correlations between pain and pruritus scores. Multiple linear regression analysis showed that surgery method was negatively linearly correlated with visual analog scale (VAS) pain score, brief pain inventory (BPI) total, VAS pruritus score, 5-D itch scale total, four-item itch questionnaire (FIIQ) total and PSQI total.ConclusionsCO2-AFL surgery significantly improved sleep quality and reduced pain and pruritus of hypertrophic scar patients. The alleviation of sleep disorder was associated with improvement of deep sleep quality including deep sleep time and deep sleep deficiency.Trial registrationThe Chinese Clinical Trial Registry (ChiCTR200035268) approved retrospectively registration on 5 Aug 2020.

Fractional carbon dioxide laser-assisted topical steroid delivery versus intralesional steroid in the treatment of alopecia areata

Background Alopecia areata is a common disease that affects the psychological well-being of the affected individuals. No single treatment option is proved to be effective and safe in its management. Laser-assisted drug delivery is a new method for the management of different dermatological diseases. Objective To evaluate the effectiveness of fractional carbon dioxide laser-assisted topical steroid delivery in the management of alopecia areata. Patients and methods A total of 30 patients with alopecia areata with two or more nonadjacent patches were included. Patients were randomized and given two separate treatment modalities in two different patches in the same individual. One patch was treated with fractional carbon dioxide laser followed by topical triamcinolone acetonide (group I), and the other was treated with intralesional triamcinolone acetonide (group II). Follow-ups by MacDonald Hull and Norris grading were done every 3 weeks for 3 months. Results The mean grading score in group I patches treated with ablative fractional CO2 laser followed by the topical steroid application at fourth follow-up was 3.37±0.76, and the mean grading score in group II patches treated with intralesional steroid at fourth follow-up was 3.73±0.58. There was significant improvement in the MacDonald Hull and Norris grading score every follow-up in both groups. However, group II patches showed significantly higher mean grading score as compared with group I patches. The mean pain score in group II patches was significantly higher than that in group I patches. Conclusion The use of fractional carbon dioxide laser to assist topical steroid delivery is a promising, safe, and effective method for the treatment of alopecia areata. Although intralesional steroid treatment showed more significant results, we thought that the low pain score in patients treated with laser-assisted drug delivery is more advantage, which increases their compliance to treatment.