Augmented Reality and Plastic Surgery Training: A Qualitative Study.

Background and objective The coronavirus disease 2019 (COVID-19) pandemic has led to many challenges in face-to-face teaching and training in plastic surgery. However, it has also proved to be an incubator for many technological solutions. Augmented reality (AR) platforms may offer a safe, equitable, and efficient means to provide training in plastic surgery. This study aimed to explore the user's experience of AR as an educational intervention during the COVID-19 pandemic in the United Kingdom (UK). Materials and methods The Proximie® AR platform (Proximie Limited, London, UK) has been in use in a UK plastic surgical department for facilitating webinars, visual libraries, and streamed procedures. The experience of a range of trainers and trainees was qualitatively explored through 10 individual interviews. Data-emergent theme analysis was also performed. Results AR was well-received in the context of COVID-19 and training in general as a means to enable theatre access, and visual revision, remotely. The potential for its use in remote coaching and telementoring was also discussed. Recommendations were made by the users to optimise the experience both from the trainer and learner perspectives. Data were presented pertaining to the following themes: surgical AR as a substitute for hands-on learning; surgical AR and theoretical learning; considerations specific to streamed procedures using Proximie®; considerations in the use of technology in general. Conclusion Harnessing novel technologies in surgical education offers an exciting opportunity, fast-tracked by COVID-19, but applicable beyond it. Though this study includes a small sample size, its findings suggest that AR platforms may offer a uniquely interactive remote educational experience in surgical training. Strategies and suggestions for its use are discussed, as well as broader considerations in using technology in surgical education.

Risk factors and timing of postoperative hematomas following microvascular breast reconstruction: A prospective cohort study.

BACKGROUND: Microvascular free tissue transfer has become the gold standard for breast reconstruction. While safe and reliable, there are operative complications, with hematomas developing under the free flap among the more common. These can compromise flap viability, lead to hemodynamic instability and infection. This study aims to identify predictors of hematomas following free-flap breast reconstruction. METHODS: A prospective study was undertaken of patients undergoing autologous free-flap breast reconstruction over a 4-year period. Precise times to hematoma formation, age, arterial and venous anastomosis time, and anastomosis length were recorded and analyzed for association with time to hematoma formation. RESULTS: One thousand two hundred twelve flaps were undertaken in 1,070 patients during the period of review. Seventy-one (5.8%) flaps were taken back to theater for hematomas. Immediate reconstruction had a significantly higher hematoma rate compared to delayed reconstruction 7.4% versus 5.2% (p < .001). It is noted that there were two main peaks for time to develop hematomas-less than 4 hr postsurgery and between 12 and 15 hr postsurgery. CONCLUSION: Hematomas are a complication, which must be managed with prompt return to theater to ensure flap salvage and patient stabilization. Predictors for hematoma are presented, with hematomas most likely encountered within the first 12 hr of surgery.

Technical refinements of the free medial sural artery perforator (MSAP) flap in reconstruction of multifaceted ankle soft tissue defects.

BACKGROUND: Peri-ankle defects are difficult to reconstruct due to sharp contours, thin skin, aesthetic value, function and footwear impact. The medial sural artery perforator flap (MSAP) is increasing in popularity as a thin and pliable flap. This study aims to demonstrate its versatility in reconstructing defects around the ankle area and our approach to insetting these flaps in difficult areas around the ankle without the need for subsequent flap revisions. METHODS: A retrospective review of the senior author's series of peri-ankle reconstructions using the MSAP flap was undertaken. RESULTS: Between 2011-2015, 15 patients underwent peri-ankle reconstruction with the MSAP flap. There were 4 dorsal foot, 4 medial malleolar, 4 lateral malleolar, and 3 tendo-achilles defects. All flaps in this series survived. There was one episode of partial flap necrosis in one patient and no incidences of donor site dehiscence. All patients returned to full ambulation and none required subsequent flap revision. CONCLUSIONS: The MSAP flap offers the benefits of a fasciocutaneous flap, whilst providing a thin, pliable, single stage and robust reconstruction for peri-ankle defects, with a cosmetically ideal donor site.

Development and validation of the Burnt Hand Outcome Tool (BHOT): A patient-led questionnaire for adults with hand burns.

Hand burns are unique in their functional, aesthetic and emotional impact on patients. Measuring the progress of a patient's ability to carry out essential and desired tasks, their emotional state, interaction with society as well as scar, pain and itch as their burn heals, has until now relied on the use of a combination of several different tools. We have developed a questionnaire specifically to address the multiple different aspects of the impact of a hand burn on a patient. This has been validated in a study of adult patients with hand burns in a UK unit, by a variety of psychometric tests. Ninety-four patients entered the study and questionnaires were completed over the course of a year at five time points. The total BHOT and DASH questionnaires completed at each time point was as follows: 86 before; 52 healed; 29 at 3 months; 31 at 6 months; 28 at 1 year, i.e. 226 DASH and 226 BHOT questionnaires in total. The questionnaire has been shown to have excellent reliability, criterion validity, construct validity, and responsiveness. The result is the Burnt Hand Outcome Tool (BHOT), a patient reported, quick and easy to use yet comprehensive questionnaire specifically for adult patients with burns to the hand.

The Hand Burn Severity (HABS) score: A simple tool for stratifying severity of hand burns.

Hand burns represent a unique challenge to the burns team due to the intricate structure and unrivalled functional importance of the hand. The initial assessment and prognosis relies on consideration of the specific site involved as well as depth of the burn. We created a simple severity score that could be used by referring non-specialists and researchers alike. The Hand Burn Severity (HABS) score stratifies hand burns according to severity with a numerical value of between 0 (no burn) and 18 (most severe) per hand. Three independent assessors scored the photographs of 121 burned hands of 106 adult and paediatric patients, demonstrating excellent inter-rater reliability (r=0.91, p<0.0001 on testing with Lin's correlation coefficient). A significant relationship was shown between the HABS score and a reliable binary outcome of the requirement for surgical excision on Mann-Whitney U testing (U=152; Z=9.8; p=0.0001). A receiver operator characteristic (ROC) curve analysis found a cut off score of 5.5, indicating that those with a HABS score below 6 did not require an operation, whereas those with a score above 6 did. The HABS score was shown to be more sensitive and specific that assessment of burn depth alone. The HABS score is a simple to use tool to stratify severity at initial presentation of hand burns which will be useful when referring, and when reporting outcomes.

The microvascular anastomotic coupler for venous anastomoses in free flap breast reconstruction improves outcomes.

BACKGROUND: Venous couplers are ubiquitous around the world and are a useful tool for the reconstructive microsurgeon. A systematic review of coupler performance studies demonstrated a thrombosis rate range of 0% to 3%, whilst the average time of using the device is 5 minutes. There is sparse published data on cost analysis and the impact of operator experience on the anastomotic coupler device success. Improvements in outcomes other than time benefits have also not been shown. This study aims to address these deficiencies in the literature. METHODS: A retrospective clinical study was undertaken, aiming to compare equivalent groups of patients that had free flap surgery with venous micro-anastomoses with those that had sutured anastomoses. The cohort comprised all patients undergoing microsurgical breast reconstruction at the St Andrew's Centre for Plastic Surgery & Burns from January 2009 to December 2014. RESULTS: Between January 2010 to December 2014, 1,064 patients underwent 1,206 free flap breast reconstructions. The average age of patients was 50 years. Seventy percent of patients underwent mastectomy and immediate reconstruction during this period with the remaining 30% having a delayed reconstruction. The 1,206 free flaps comprised of 83 transverse myocutaneous gracilis (TMG) flaps, and 1,123 deep inferior epigastric artery perforator (DIEP) flaps. In total the coupler was used in 319 flaps, 26% of the cohort. There was a statistically significant clinical benefit in using the anastomotic coupler for venous anastomosis. Overall, the return to theatre rate was 12.69% whilst the overall flap loss rate was 0.75%. The overall coupler failure rate was significantly less at 1.4% whilst sutured vein failure rate was 3.57% (P=0.001). CONCLUSIONS: The anastomotic coupler for venous anastomosis in free flap surgery is associated with reduced operating times, reduced take-backs to theatre and cost benefits. This is the first study to demonstrate clear clinical benefits to anastomotic couplers, and suggests that these may be the gold standard for venous microanastomosis. With increasing experience with their use and technological advances, these outcomes may continue to improve.

Preoperative computed tomography angiography for planning DIEP flap breast reconstruction reduces operative time and overall complications.

BACKGROUND: The approach and operative techniques associated with breast reconstruction have steadily been refined since its inception, with abdominal perforator-based flaps becoming the gold standard reconstructive option for women undergoing breast cancer surgery. The current study comprises a cohort of 632 patients, in whom specific operative times are recorded by a blinded observer, and aims to address the potential benefits seen with the use of computer tomography (CT) scanning preoperatively on operative outcomes, complications and surgical times. METHODS: A prospectively recorded, retrospective review was undertaken of patients undergoing autologous breast reconstruction with a DIEP flap at the St Andrews Centre over a 4-year period from 2010 to 2014. Computed tomography angiography (CTA) scanning of patients began in September 2012 and thus 2 time periods were compared: 2 years prior to the use of CTA scans and 2 years afterwards. For all patients, key variables were collected including patient demographics, operative times, flap harvest time, pedicle length, surgeon experience and complications. RESULTS: In group 1, comprising patients within the period prior to CTA scans, 265 patients underwent 312 flaps; whilst in group 2, the immediately following 2 years, 275 patients had 320 flaps. The use of preoperative CTA scans demonstrated a significant reduction in flap harvest time of 13 minutes (P<0.013). This significant time saving was seen in all flap modifications: unilateral, bilateral and bipedicled DIEP flaps. The greatest time saving was seen in bipedicle flaps, with a 35-minute time saving. The return to theatre rate significantly dropped from 11.2% to 6.9% following the use of CTA scans, but there was no difference in the total failure rate. CONCLUSIONS: The study has demonstrated both a benefit to flap harvest time as well as overall operative times when using preoperative CTA. The use of CTA was associated with a significant reduction in complications requiring a return to theatre in the immediate postoperative period. Modern scanners and techniques can reduce the level of ionising radiation, facilitating patients being able to benefit from the advantages that this preoperative planning can convey.

Stacked and bipedicled abdominal free flaps for breast reconstruction: considerations for shaping.

BACKGROUND: Stacked and bipedicled abdominal flaps are useful in women who require a large breast reconstruction but have relative paucity of abdominal tissue. A new classification system is described to assist the surgeon in achieving the best possible aesthetic outcome. METHODS: A retrospective review of 25 consecutive stacked and/or bipedicled deep inferior epigastric perforator (DIEP) flap reconstructions was assessed from 2009 to 2014. Demographic data and key variables were prospectively collected in our breast reconstruction database and an aesthetic classification devised. There are four main subtypes, (I) folded; (II) divided; (III) coned; and (IV) divided and folded. Each of these subtypes can be moulded in a symmetrically or asymmetrically fashion depending on the contralateral breast shape together with distribution and consistency of fat within the abdominal flap. RESULTS: Of the 25 patients, three-quarter were immediate reconstruction, with an average age of 48 years and a median follow-up of 2 years 10 months. Just over half the patients (57%) had bipedicle flaps with two recipient donor vessels with the remaining 43% had stacked flaps. The most common recipient sites are the thoracodorsal vessels (62%) and intercostal perforators (26%). The average abdominal pannus weight was 610 grams (SD: 320 grams), with a hemi-abdominal weight of 305 grams. Two patients had haematomas, of which one lost their reconstruction. Another patient had a venous congestion flap which was salvaged. CONCLUSIONS: Bipedicled or stacked abdominal flaps allow the all four zones of the abdominal tissue to be used in unilateral breast reconstruction. The approach of tailoring the abdominal flaps to match the contralateral breast reconstruction is largely an art form. The paper aims to bring some meaningful system to aid the surgeon to achieve the best possible outcome with the components presented to them.

Periorbital burns ­ a 6 year review of management and outcome.

INTRODUCTION: Periorbital burns are an infrequent but potentially devastating injury. This study aimed to elucidate the spectrum of such injuries presenting to a UK burns centre and the outcome achieved in the cases requiring periorbital reconstruction for the restoration of function and form. METHODS: Patients admitted to a UK regional burns centre between January 2005 and January 2011 with periorbital burns were identified from the Patient Administration System (PAS), theatre logs and the International Burns Injury database (IBID). Multiple parameters were assessed using patient notes, ITU and hospital image databases. RESULTS: Over 6 years, 167 patients with facial burns requiring surgery were treated, including 103 patients with eyelid burns. The mean burn size was 33% total body surface area. The eyelid burn depth varied; 67% superficial partial thickness, 17% deep dermal and 16% full thickness. Two patients lost complete vision in one eye, one patient underwent amniotic membrane grafting. In total 16 patients required periorbital reconstruction to maintain eye closure, with 1.8 operations on average per patient. Acute surgery was required in 11 patients, whilst late intervention (>3 months) was needed in 5, 2 patients had both acute and delayed surgery. Of the 5 late intervention patients 4 were treated with full thickness skin grafts and 1 with a Z plasty. Average time for final reconstruction with delayed surgery was 4.5 months. CONCLUSION: The goal in management of periorbital burns is preservation of vision, prevention of future complications and restoration of an acceptable aesthetic outcome. Total visual loss is thankfully rare, but early ophthalmology intervention is vital given the evidence of corneal damage as a brief therapeutic window exists.

A systematic review of the applications of free tissue transfer for paediatric lower limb salvage following trauma.

BACKGROUND: Since the advent of microsurgical free tissue transfer in the 1960s, it has now become an indispensable part of limb salvage surgery. However, its application in children was initially met with concerns regarding vessel diameter, increased potential for vasospasm and its potential impact on normal growth and development. This resulted in its restriction to specialist paediatric facilities. With improvements and greater confidence in microsurgical techniques, more units are starting to rewrite the initially popularised narrative regarding free tissue transfer in paediatric limb salvage following trauma. A systematic review was undertaken, using the PRISMA criteria for systematic reviews, of all published literature relating to the use of free flaps in paediatric lower limb salvage following trauma. METHODS: Inclusion and exclusion criteria were defined and Medline, Embase, PubMed and Google Scholar databases were searched from inception to September 2014 with the following search terms: "free tissue transfer", "free flaps", "microvascular free tissue transfer", "paediatric/pediatric", "children", "lower limb", "trauma" and "reconstruction". RESULTS: A total of 375 studies were retrieved following the electronic database search, of which 23 studies met the inclusion criteria. Two further studies were found via a hand-search of the reference lists of the retrieved studies. A total of 25 studies were, thus, included in the review. CONCLUSIONS: This study presents a synthesis of the literature available on the indications, timing, selection, viability, complications and functional outcome of free tissue transfer following lower limb trauma in paediatric patients. Limitations of current studies with potential areas for further research are also discussed.

A systematic review of the evolution of laser Doppler techniques in burn depth assessment.

Aims. The introduction of laser Doppler (LD) techniques to assess burn depth has revolutionized the treatment of burns of indeterminate depth. This paper will systematically review studies related to these two techniques and trace their evolution. At the same time we hope to highlight current controversies and areas where further research is necessary with regard to LD imaging (LDI) techniques. Methods. A systematic search for relevant literature was carried out on PubMed, Medline, EMBASE, and Google Scholar. Key search terms included the following: "Laser Doppler imaging," "laser Doppler flow," and "burn depth." Results. A total of 53 studies were identified. Twenty-six studies which met the inclusion/exclusion criteria were included in the review. Conclusions. The numerous advantages of LDI over those of LD flowmetry have resulted in the former technique superseding the latter one. Despite the presence of alternative burn depth assessment techniques, LDI remains the most favoured. Various newer LDI machines with increasingly sophisticated methods of assessing burn depth have been introduced throughout the years. However, factors such as cost effectiveness, scanning of topographically inconsistent areas of the body, and skewing of results due to tattoos, peripheral vascular disease, and anaemia continue to be sighted as obstacles to LDI which require further research.

Hearing preservation surgery: current opinions.

BACKGROUND/AIMS: Although the indications and surgical technique for cochlear implantation are well formalized, the introduction of hearing preservation surgery and electric acoustic stimulation have posed new questions for the cochlear implant clinician. This study was designed to crystallize the contemporary views of the implant community on how best to implement these new strategies. METHOD: An anonymized questionnaire was made available to members of the Politzer Society and a selected group of implant surgeons via the Internet. Five questions required the respondent to choose a specific answer from the text on technique and 17 questions assessed the relative importance attached to the statements relating to the surgical process. A final question inquired on what basis the opinions were derived. The country of origin was also identified. RESULTS: The questionnaire was sent to 180 clinicians of whom 62 replied (34%). Tacit agreement was obtained in 2 of the specific questions and in 10 of the relative importance inquiries. There were varying degrees of opinions on the remaining questions. CONCLUSION: It is clear that there is still limited consensus between surgeons when considering ways of maximizing outcomes in hearing preservation surgery and electric acoustic stimulation. More protocol-driven studies are required before an accepted gold standard approach can be achieved.

Frontofacial monobloc distraction using the StealthStation intraoperative navigation system: the ability to see where you are cutting.

The frontofacial monobloc advancement is a safe, effective, and cosmetically acceptable treatment of frontal and midface retrusions present in craniofacial syndromes. Although a number of modifications have been put forward to supplement this procedure, the basic steps of cleaving the facial skeleton from the skull base remain the same. We present a case where intraoperative navigation was used to visualize the craniofacial anatomy while the bone cuts were made for this cleaving process. This technique visually demonstrates parts of this procedure that were hitherto performed solely using tactile and auditory inputs superimposed on a 3-dimensional model of the craniofacial anatomy in the surgeon's mind. This technique offers a significant advantage for teaching purposes, in performing cases with complex anatomy and for accurate positioning of the distractor devices.

Venepuncture technique training vs practice: a survey of foundation year 1 doctors.

This survey investigated potential disparity between foundation year 1 doctors' formal undergraduate venepuncture training and their actual clinical practice. Is there still a high prevalence of needle and syringe use?