Yaron Shoham

A novel rapid and selective enzymatic debridement agent for burn wound management: A multi-center RCT

OBJECTIVES Excisional debridement followed by autografting is the standard of care (SOC) for deep burns, but is associated with serious potential complications. Conservative, non-surgical and current enzymatic debridement methods are inefficiently slow. We determined whether a non-surgical option of rapid enzymatic debridement with the debriding enzyme NexoBrid™ (NXB) would reduce need for surgery while achieving similar esthetic and functional outcomes as SOC. METHODS We conducted a multi-center, open-label, randomized, controlled clinical trial including patients aged 4-55 years with deep partial and full thickness burns covering 5-30% of their total body surface area (TBSA). Patients were randomly assigned to burn debridement with NXB (applied for 4h) or SOC, which included surgical excisional or non-surgical debridement. RESULTS NXB significantly reduced the time from injury to complete débridement (2.2 vs. 8.7 days, P<0.0001), need for surgery (24.5% vs. 70.0%, P<0.0001), the area of burns excised (13.1% vs. 56.7%, P<0.0001) and the need for autografting (17.9% vs. 34.1%, P=0.01). Scar quality and quality of life scores were similar in both study groups as were the rates of adverse events. CONCLUSIONS Enzymatic débridement with NXB resulted in reduced need for and extent of surgery compared with SOC while achieving comparable long-term results in patients with deep burns. TRIAL REGISTRATION Clinical Trials.gov NCT00324311.

Aplasia cutis congenita: clinical management and a new classification system.

Background: Aplasia cutis congenita is a rare, congenital disorder. In its severe phenotype, it is potentially life threatening. Its management and the timing of surgery remain controversial because of the risks involved with both conservative and surgical approaches. Most literature is based on case reports and very small case series because of the rarity of the disorder. The authors present their experience treating newborns with aplasia cutis congenita and its progressive development. Methods: Using a hospital registry, the authors found all cases of newborns diagnosed with aplasia cutis congenita during the years 2000 to 2013. Clinical data were gathered from hospital and clinic records, and photographs were obtained by the plastic surgery team. Results: Twenty-two cases of aplasia cutis congenita were included in this study: 21 on the scalp and one on the foot heel. Eleven patients were male and 11 were female. Defect size ranged from 1 to 150 cm2 (average, 29 cm2). Three patients died as a result of uncontrollable hemorrhage. Six patients underwent emergency coverage, one with allografts later replaced by split-thickness skin grafts and five by immediate split-thickness skin grafting. All of the patients who underwent immediate skin grafting survived and thrived. Conclusions: The authors emphasize the role of emergency split-thickness skin grafting in the treatment of large aplasia cutis congenita or ones with large veins or sagittal sinus exposure. The authors also present a practical, treatment-oriented classification that could assist physicians in estimating the severity and therefore prognosis of the disease and offer a treatment guideline. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.

Our initial learning curve in the enzymatic debridement of severely burned hands—Management and pit falls of initial treatments and our development of a post debridement wound treatment algorithm

INTRODUCTION Excisional surgical debridement (SD) is still the gold standard in the treatment of deeply burned hands, though the intricate anatomy is easily damaged. Previous studies demonstrated that enzymatic debridement with the bromelain debriding agent NexoBrid® (EDNX) is more selective and thus can preserve viable tissue with excellent outcome results. So far no method paper has been published presenting different treatment algorithms in this new field. Therefore our aim was to close this gap by presenting our detailed learning curve in EDNX of deeply burned hands. METHODS We conducted a single-center prospective observational clinical trial treating 20 patients with deeply burned hands with EDNX. Different anaesthetic procedures, debridement and wound treatment algorithms were compared and main pitfalls described. RESULTS EDNX was efficient in 90% of the treatments though correct wound bed evaluation was challenging and found unusual compared to SD. Post EDNX surprisingly the majority of the burn surface area was found overestimated (18 wounds). Finally we simplified our process and reduced treatment costs by following a modified treatment algorithm and treating under plexus anaesthesia bedside through a single nurse and one burn surgeon solely. Suprathel® could be shown to be an appropriate dressing for wound treatment after EDNX. Complete healing (less 5% rest defect) was achieved at an average of day 28. CONCLUSION EDNX in deep burned hands is promising regarding handling and duration of the treatment, efficiency and selectivity of debridement, healing potential and early rehabilitation. Following our treatment algorithm EDNX can be performed easily and even without special knowledge in burn wound depth evaluation.

Admission Cell Free DNA as a Prognostic Factor in Burns: Quantification by Use of a Direct Rapid Fluorometric Technique

Background. Despite great advances in the treatment of burn patients, useful prognostic markers are sparse. During the past years there has been increasing interest in circulating plasma cell free DNA as a potential marker for tissue injury. We have developed a rapid direct fluorescent assay for cell free DNA quantification that allows obtaining accurate, fast, and inexpensive measurements. Objective. To use this technique for measuring plasma cell free DNA levels in burn patients and to further explore the use of cell free DNA as a potential marker of patient outcome in burns. Methods. Cell free DNA levels obtained from 14 burn victims within 6 hours of injury and 14 healthy controls were quantified by a direct rapid fluorometric assay. Results. Patient admission cell free DNA levels were significantly elevated compared with that of controls (1797 ± 1523 ng/mL versus 374 ± 245 ng/mL, P = 0.004). There are statistically significant correlations between cell free DNA admission levels and burn degree (Spearmans correlation = 0.78, P = 0.001), total body surface area (Spearmans correlation = 0.61, P = 0.02), and total burn volume (Spearmans correlation = 0.64, P = 0.014). Conclusions. Admission cell free DNA levels can serve as a prognostic factor in burns and future routine use can be made possible by use of our direct rapid fluorometric assay.

BurnCase 3D software validation study: Burn size measurement accuracy and inter-rater reliability

OBJECTIVE The aim of this study was to compare the accuracy of burn size estimation using the computer-assisted software BurnCase 3D (RISC Software GmbH, Hagenberg, Austria) with that using a 2D scan, considered to be the actual burn size. METHODS Thirty artificial burn areas were pre planned and prepared on three mannequins (one child, one female, and one male). Five trained physicians (raters) were asked to assess the size of all wound areas using BurnCase 3D software. The results were then compared with the real wound areas, as determined by 2D planimetry imaging. To examine inter-rater reliability, we performed an intraclass correlation analysis with a 95% confidence interval. RESULTS The mean wound area estimations of the five raters using BurnCase 3D were in total 20.7±0.9% for the child, 27.2±1.5% for the female and 16.5±0.1% for the male mannequin. Our analysis showed relative overestimations of 0.4%, 2.8% and 1.5% for the child, female and male mannequins respectively, compared to the 2D scan. The intraclass correlation between the single raters for mean percentage of the artificial burn areas was 98.6%. There was also a high intraclass correlation between the single raters and the 2D Scan visible. CONCLUSION BurnCase 3D is a valid and reliable tool for the determination of total body surface area burned in standard models. Further clinical studies including different pediatric and overweight adult mannequins are warranted.

Capsular Flap: New Applications

Breast augmentation with silicone implants is one of the most commonly performed procedures for women seeking improvement in their body image. Because the number of breast augmentation operations is growing, the number of subsequent reoperations is increasing. Causes for repeated operative procedures include infection, capsular contracture, silicone implant replacement, and breast reaugmentation. As the average volume of silicone implants used is steadily growing according to patients’ wishes and fashion requirements, the plastic surgeon often is asked to replace the silicone implants with larger implants. Replacing breast implants with a similar sized implant is a relatively simple operation, but insertion of larger implants may present a challenge due to insufficient soft tissue coverage of the lower pole of the larger breast implant, especially in thin subjects. Total coverage of the breast implant can be achieved by use of tissue substitutes (TS), such as acellular dermal matrices. Usage of TS, however, is prone to complications and very costly, and these factors influence the implementation of TS in a private practice setup. This report describes a capsular flap used to cover the lower pole of breast implants. The flap guarantees multilayered stable wound closure and prevents displacement of the inframammary fold. The capsular flap also was used to correct an inferiorly displaced inframammary fold as a consequence of the breast augmentation.Level of Evidence VThis journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

Enzymatic Versus Traditional Surgical Debridement of Severely Burned Hands: A Comparison of Selectivity, Efficacy, Healing Time, and Three-Month Scar Quality

Severe burns of the hands are extremely challenging, given their anatomic complexity and vulnerability. Although excisional debridement with autografting remains the standard of care (SOC), previous studies have shown that use of enzymatic debridement with bromelain (NexoBrid, EDNX) enables rapid, selective enzymatic debridement, preserving viable tissue. To date, only two studies accruing data on EDNX in this setting have been published. The current study was conducted to compare EDNX with traditional surgical debridement (TSD) of deep dermal and full-thickness hand burns. This single-center, controlled clinical trial included 40 patients, aged 18 to 76 years, with deep dermal burns of the hand. The first 20 patients were debrided surgically, and the other 20 patients were using EDNX for debridement. Therapeutic selectivity, time to complete debridement and healing, complications, and 3-month functional/esthetic outcomes were compared by group. EDNX (vs TSD) significantly reduced time to complete debridement after admission (0.95 day vs 7.750 days; P < .001) and treatments needed for complete debridement (1.05 vs 1.45; P < .001), improving burn depth evaluation (initially overestimated in 55% of EDNX-treated patients). The number of wounds requiring autografting was certainly reduced (15% vs 95%; P = .034), as was time to complete healing after first debridement (23.30 vs 32.00 days; P < .001), and early scar quality after 3 months was nearly equivalent, with only heightened local redness in the EDNX group (P < .001). Compared with TSD, EDNX was superior in burn depth evaluation, tissue preservation, completeness of debridement, and wound closure. Scar quality after 3 months did not differ substantially.

Facial Reconstruction of a Mucormycosis Survivor by Free Rectus Abdominis Muscle Flap, Tissue Expansion, and Ocular Prosthesis.

Invasive sinonasal mucormycosis is a rare fungal infection that usually occurs in immunocompromised or diabetic patients, and it is often fatal. The authors present a case of a woman patient suffering from systemic lupus erythematosus and diabetes mellitus treated with prednisone, presenting with a rapidly progressive rhino-orbital-cerebral mucormycosis. She was successfully treated with combined intravenous antifungal therapy and radical debridement followed by complex defect reconstruction with a free vertical rectus abdominis myocutaneous flap, tissue expander, and ophthalmic prosthesis.

Double Back Cut in Post-mastectomy Breast Skin (Fish-Shaped Skin Paddle) in Delayed Pedicled TRAM Flap Breast Reconstruction

AbstractBreast reconstruction has become standard of care for female patients with breast cancer. The transverse rectus abdominis musculo-cutaneous flap (TRAMf) is the most common method of immediate or delayed autologous breast reconstruction following mastectomy. We share our experience with modified, double back cut of post-mastectomy skin in delayed pedicled TRAMf breast reconstruction, resulting in fish-shaped skin paddle. This sort of back cut is a simple, reliable way to obtain a natural, esthetically pleasant breast mound with inconspicuous hidden scars.Level of Evidence VThis journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

Effect of Botulinum Toxin A on Muscle Healing and its Implications in Aesthetic and Reconstructive Surgery

Background Muscle activity contributes to the enhancement of facial aging deformity, blepharospasm, cerebral palsy spasticity, trismus, torticollis, and other conditions. Myotomy of the involved muscles in order to reduce the deformity has variable success rates due to muscle healing and regeneration of activity. Objectives The goal of this study was to investigate whether blocking striated muscle activity with Botulinum toxin (BtxA) during the healing time after myotomy alters the healing process and reduces long-term muscle activity. Methods Eighteen Sprague Dawley rats where divided into 3 groups: group A (n = 7) underwent myotomy of their Latisimus Dorsi muscle; group B (n = 7) underwent myotomy and injection of BtxA into their severed muscle; group C (n = 4) injection of BtxA only. Muscle strength was tested periodically using a grip test. Results Starting at week 16 and until the termination of study at week 22, group B (Myotomy + BtxA) showed significant reduction in muscle power compared to the two control groups. Conclusions Addition of BtxA injection into a muscle immediately after myotomy may interfere with muscle healing and contribute to a more successful long-term result.