The use of NovoSorb biodegradable temporising matrix in wound management: a literature review and case series

OBJECTIVE

NovoSorb (Poly-Novo Ltd, Australia) biodegradable temporising matrix (BTM) is a novel artificial dermal matrix. Previous literature is weighted towards its use in burns reconstruction; however, this paper describes its use within a range of wound aetiologies. The authors present one of the largest and most diverse case series to date, and aim to provide an independent benchmark of clinical practice.

METHOD

A retrospective observational study was performed. Patient demographics and clinical data (wound aetiology, site, total body surface area (TBSA), wound bed, number of debridements, time to BTM integration, time to skin grafting) were collected and subgroup analysis preformed.

RESULTS

The cohort consisted of 37 patients (acute trauma wounds, n=19; hard-to-heal wounds, n=9; acute infections, n=6; cancer, n=3). Successful BTM integration, allowing subsequent split-thickness skin grafting (STSG), occurred in 70% of cases, despite an overall complication rate of 51%. Mean time from BTM application to STSG was 53 days. There was no difference in STSG outcomes when grafting was performed either before or after the six-week BTM application period. There was no difference when various wound beds (fascia, tendon, periosteum) were compared. Patients >65 years of age were more likely to experience complications; however, this did not affect the speed of integration. The relation of diabetes and smoking to overall integration had no statistical significance.

CONCLUSION

In comorbid patients in particular, the time between BTM application and STSG may be longer than the manufacturer's recommendation. Furthermore, data suggest greater wound bed optimisation and closer interval monitoring in hard-to-heal/malignant wounds, and in older patients and patients with comorbidities. However, BTM appears robust (even in infection) and is showing promise as a useful reconstructive tool.

Intra-medullary Cannulated Headless Compression Screw for Bone Graft Fixation in Metacarpal Fractures

High energy metacarpal fracture presenting with critical bone loss requires bone graft and hardware stabilisation. Early bone grafting and rigid internal fixation allow expedited patient recovery. Plate fixation is the most described technique when an autologous bone graft is being used. In this report, we present an alternative technique to secure bone grafts to metacarpal shafts with intra-medullary headless compression screws (HCS). In the presented patient, significant bone defects of the fourth and fifth metacarpals were bridged using iliac crest cortico-cancellous bone grafts and fixed with HCS. This method of fixation allowed controlled early active mobilisation. Bone graft incorporation and excellent active range of motion were demonstrated. Level of Evidence: Level V (Therapeutic).

SP4.1.14 Single centre experience in managing acute appendicitis during COVID-19 pandemic

Background

Given the pressure of COVID pandemic, the UK Intercollegiate guidance encouraged a move towards non-operative or open appendicectomy management of acute appendicitis. The aim of the study was to assess the approaches used to manage acute appendicitis and their outcomes during pandemic peak and after it.

Methods

This was a single-centre retrospective study, 2-observer data collection. We collected and analysed data on acute appendicitis management approaches (surgical and non-surgical) and patient outcomes were compared during the peak of the pandemic (04-2020 to 06-2020) and post-peak (07-2020 to 09-2020) periods.

Results

190 patients - (peak – 88, F:M=1.09, median age – 30.5) and post-peak 102 (F:M=1.12, median age -31)). There were no significant differences for APPY risk score, ASA grade, comorbidities between the groups. There was more diagnostic imaging performed during the peak of the pandemic (peak 71.6%, post-peak – 56.9%) (p = 0.035 X2=4.431). Comparison between managing patients during peak and post-peak showed that approaches were the following: conservative (14.8% vs 14.7%, P = 0.998), laparoscopic appendicectomy (65.3% vs 96.6% P = <0.001), open appendicectomy (34.7% vs 3.4% P = <0.001). There was no significant difference in postoperative complications (Clavien-Dindo II-IIIb), readmission to hospital, or total LoS (median=3 days) between the groups (p > 0.05). Median LoS for patients treated conservatively was 1 day. Only 1 patient developed COVID postoperatively, the mortality was 0%.

Conclusions

Treatment strategies adapted and modified in COVID peak were effective and safe in managing acute appendicitis. Laparoscopic surgery remained a safe practice even in the peak of COVID pandemic.

SP2.2.18UK Surgical Training in the Independent Sector During COVID-19 – A Snapshot Survey

Aims

In response to the COVID-19 pandemic and the cancellation of elective surgery, the Independent sector (IS) has been utilised to provide COVID-light sites. On average operative log book numbers have been reduced by 50% due to a reduction in operative exposure. The Four Educational Bodies continue to support training within the independent sector. This study aimed to qualitatively assess access and barriers to UK surgical training in the Independent Sector.

Methods

A snap-shot online survey was distributed to ASIT members of all training specialities and grades between 21/10/2020-11/11/2020 . Data measures included participant demographics, frequency of access, participation in training opportunities including outpatient clinic, theatre lists and endoscopy and any barriers encountered. A mixture of Likert scale and short answer questions were utilised.

Results

249 complete responses representing all grades and specialities were included in the final analysis (34.29% CST and 56.3% HST). 35.7% of trainees reported access to the IS. 22.9% had access to at least one operating list whilst 70.3% had none. Access to outpatient clinics and endoscopy was negligible. 75% of trainees ‘strongly agreed’ that when access was achievable, it was beneficial to their training. Multiple barriers were identified including Human Resource requirements and local service provision.

Conclusions

Within the sample, access to the IS has been poor. There is wide variation in barriers to access across the 4 nations and IS providers. Trainees and Trainers should maximise training opportunities in the IS. Where barriers exist, they should be reported to local Training Programme Directors.