Use of the modified meek technique for the coverage of extensive burn wounds

INTRODUCTION

Autologous split thickness skin grafting using meshing technique remains the preferred option for the management of deep dermal and full thickness burns. The limited donor site availability seen in patients with extensive burns, however, restricts use of the mesh grafting technique for skin expansion. Meek micrografting was developed to allow for greater expansion, and, therefore, more reliable treatment of extensive burns. This study aimed to present our outcomes using the Meek micrografting technique and identify risk factors for graft failure.

METHODS

A retrospective review of patients admitted to our large academic hospital who were treated with the Meek micrografting technique from 2013 to 2022 was conducted. Patient demographics, surgical characteristics and outcomes were reported. Regression analyses were performed to identify factors that influence graft take and reoperation rate.

RESULTS

A total of 73 patients with a mean age of 45.7 ± 19.9 years and mean burn size of 60.0 ± 17.8%TBSA, with 45.3 ± 14.9% TBSA being third degree burns, received Meek transplantation. The mean graft take after removal of the pre-folded polyamide gauze at the tenth post-operative day was 75.8 ± 14.7%. Pre-treatment with use of an allograft, longer waiting time between admission and Meek grafting and transplantation over a dermal matrix were identified as positive predictors for graft take, while age was established as a negative predictor.

CONCLUSION

By examining the outcomes of the Meek micrografting technique in extensive burn wounds we identified that preconditioning of the wound bed, through allograft or negative pressure wound therapy application, positively correlates with improved outcomes, including higher graft take. At the same time, older age was seen to negatively correlate with graft take. Overall, Meek transplantation displays a favorable safety profile with promising outcomes. Future prospective studies and clinical trials can optimize the procedure and help establish it as the golden standard for extensive and complex burns.

Meek Micro-Skin Grafting and Acellular Dermal Matrix in Pediatric Patients: A Novel Approach to Massive Extravasation Injury

(1) Background: Extravasation injuries in pediatric patients can lead to significant harm if they are not promptly diagnosed and treated. However, evidence-based standardization on extravasation management remains limited, particularly for extensive wound necrosis. This case report presents the management of an 8-week-old premature patient with an extensive extravasation injury involving the right forearm and dorsum of the hand. (2) Methods: The patient was evaluated by a multidisciplinary team in our Neonatal Intensive Care Unit. Surgical intervention involved the debridement of necrotic tissues, followed by temporary coverage with an acellular dermal matrix. Definitive coverage was achieved through Meek micrografting after three weeks. Physical therapy was provided with pre- and post-rehabilitation range of motion assessed using goniometric measurements. Scar quality was evaluated using the Vancouver Scar Scale. (3) Results: The engraftment rate of the Meek micrografts was 93%, with 16 out of 226 micrografts lost. The patient achieved a Vancouver Scar Scale score of 6, indicating a moderate degree of scarring. Significant improvements in elbow, wrist, and finger joint range of motion were observed at a 1-year follow-up. (4) Conclusions: Close observation and heightened awareness of extravasation risks by trained personnel are crucial. Meek micrografting combined with dermal substitute coverage represents an innovative approach to managing extravasation wounds in pediatric patients.

Efficacy of two-stage Meek micrografting in patients with severe burns

BACKGROUND

Burns are common injuries associated with high disability and mortality. In recent years, Meek micrografting technique has been gradually applied for the wound treatment of severe burns. However, the efficacy of two-stage Meek micrografting in patients with severe burns keeps unclear.

METHODS

The data of eligible patients with severe burns who were admitted to Southwest Hospital of the Third Military Medical University from January 2013 to December 2019 were retrospectively analysed. The patients were divided into two groups according to the Meek micrografting method: one-stage skin grafting (group A) and two-stage skin grafting (group B). The baseline data, survival rate of skin graft, length of hospital stay, treatment costs, laboratory data and cumulative survival were statistically analysed.

RESULTS

127 patients (91 in group A and 36 in group B) were included in the study. There were no significant difference in the baseline data, the length of hospital stay and treatment costs between the two groups. The survival rate of skin graft was higher in group B. Total protein and albumin level, platelet count in group B were superior to those in group A, while there were no difference in other laboratory data (prealbumin, serum creatinine, urea nitrogen, cystatin C, blood cultures, wound exudate cultures) and cumulative survival between the two groups.

CONCLUSION

Our results demonstrated that staged Meek micrografting could improve the survival rate of skin graft, by reducing the risks of hypoproteinaemia, hypoalbuminemia and low platelet counts after adequate resuscitation.

Prospective observational study comparing burn surgeons' estimations of wound healing after skin grafting to photo-assisted methods

INTRODUCTION

Appropriate graft healing after split-thickness skin graft and early recognition of complications (graft loss) are critical to burn patient management. Larger mesh ratio expansions and Meek micrografting may pose a greater challenge in estimating the percentage of wound healing. This study looks at the reliability of photograph assessments and the concordance of bedside evaluation to photograph assessments of wound healing after skin grafting.

METHODS

Three assessment methods for percentage of wound healing after skin Grafting were assessed: (1) clinicians' bedside rating, (2) clinician assessment of high-definition photographs, and (3) digital image analysis through color subtraction using Adobe Photoshop. We compared each method using a mixed-effects model on absolute agreement using intra-class correlation (ICC) and Bland Altman (BA) plots.

RESULTS

Fourteen burn patients were enrolled with 38 grafted wounds (100 sites). Bedside assessments had a mean ICC of 0.64 (compared to digital image analysis) and 0.69 (compared to photo assessment), with a wide range on BA-plots. Inter-rater reliability of photo assessment was excellent (0.96) among six clinicians. Repeated photo-assisted assessments had good intra-rater reliability (ICC: photo assessment: 0.88; digital analysis: 0.97).

CONCLUSIONS

Bedside wound healing assessments show variability; photograph documentation of sequential wound progression could supplement active clinical management or studies for more reliable assessments.

Experience and outcomes of micrografting for major paediatric burns

BACKGROUND

The deficit of donor sites in major burns over 50% of the total body surface area has necessitated the application of methods besides traditional meshed autografting to achieve definitive skin cover. The Meek micrografting technique was introduced at this hospital in 2011, especially in the absence of a reliable source of deceased donor allograft skin. The purpose of this study was to evaluate this strategy with reference to its technical execution, efficacy and indications in the context of major paediatric burn surgery.

METHODS

A cohort study was performed of all paediatric patients with major burn who underwent Meek micrografting at a dedicated paediatric burn centre in a developing country over a five year period. Demographics, details of their burns, operative management and clinical course and outcomes were collected from patient records and operative notes and analysed.

RESULTS

Thirty-five patients were managed using the micrografting technique during the study period. The mean patient age was 4.1 years (range 3 months-11 years) and their mean total body surface area (TBSA) burn was 49.7% (range 15-86%). Eleven patients sustained inhalation injuries and five developed a re-feeding syndrome on account of delayed referral. The mean abbreviated burn severity index (ABSI) was 8.5 (range 2-13). The hospital length of stay in the 27 survivors was a mean of 75.5 days, equating to 1.4 days per percentage burn. Eight patients died during the course of treatment, with a mean TBSA burn of 67.75% (range 38-86%). Graft take one month after surgery was documented to be more than 90% in 24 patients, of whom 3 subsequently died. Eleven patients had less than 90% graft take at this time, of whom 5 died.

CONCLUSION

There is a considerable 'learning curve' associated with this technique. In order to achieve success one must ensure a completely viable, non-infected bed, obtained by tangential or fascial excision, followed by allografting as temporary coverage and to 'test the wound bed' for definitive coverage. Infection resulted in the majority of autograft loss in this series, and in addition to risk factors like burn size and inhalation injury, accounted for many of the deaths in this series. Meek micrografting offers high expansion ratios, thereby facilitating durable wound cover in the presence of limited donor sites. It is unlikely that a lethal dose, 50% (LD₅₀) of almost 70% TBSA would have been possible in this context without the regular application of this technique. This study advocates for the widespread availability of Meek micrografting and deceased donor allograft skin in developing countries.

MEEK MICROGRAFTING TECHNIQUE AND ITS USE IN THE TREATMENT OF SEVERE BURN INJURIES AT THE UNIVERSITY HOSPITAL OSTRAVA BURN CENTER

BACKGROUND

Early necrectomy and skin autotransplantation are prerequisites for successful treatment of extensive burns. Insufficient autograft donor site availability is a limiting factor. The Meek micrografting technique, published by C. P. Meek in 1958, appears to be a potential solution. Skin grafts are cut into micrografts and expanded at a ratio of 1:3, 1:4, 1:6 or 1:9. Thus, even in cases with limited donor site availability, it is possible to cover large areas after necrectomy.

MATERIAL AND METHODS

Meek micrografting was first used at the University Hospital Ostrava Burns Centre in 2013. To date, 14 operations have been performed in 4 patients with extensive burn trauma. Engraftment, healing rate, and subsequent scarring (with a particular focus on scar contracture formation) were observed postoperatively.

RESULTS

The average micrograft success rate was 86.5%. The best success rates were observed in areas with deferred transplantation after necrectomy. Hypertrophic scarring occurred in both Meek and meshed transplant areas. No scar contractures requiring surgical management developed in micrografted areas. Surgical scar contracture release was required in 1 patient who underwent meshed graft transplantation.

DISCUSSION

The Meek technique demonstrated significant advantages. Micrografts can be prepared with very small skin grafts, which is impossible with the mesh technique. Meshed grafts with expansion ratios of 1:3 or higher require allograft or xenograft coverage. In our experience, overlays were not necessary for micrografts with a 1:6 expansion ratio. Given that no serious scar contractures developed in micrografted areas, we speculate that micrografts may pose a lower risk for their development when compared to meshed grafts. The disadvantage of the Meek technique is greater economic demands.

CONCLUSION

Meek micrografting is effective in the surgical management of deep burns in extensive thermal injuries with limited donor site availability...