First experience in laparoscopic surgery in low and middle income countries: A systematic review

BACKGROUND

Laparoscopic surgery has reduced morbidity and mortality rates, shorter postoperative recovery periods and lower complication rates than open surgery. It is routine practice in high-income countries and is becoming increasingly common in countries with limited resources. However, introducing laparoscopic surgery in low-and-middle-income countries (LMIC) can be expensive and requires resources, equipment, and trainers.

AIM

To report the challenges and benefits of introducing laparoscopic surgery in LMIC as well as to identify solutions to these challenges for countries with limited finances and resources.

METHODS

MEDLINE, EMBASE and Cochrane databases were searched for studies reporting first experience in laparoscopic surgery in LMIC. Included studies were published between 1996 and 2022 with full text available in English. Exclusion criteria were studies considering only open surgery, ear, nose, and throat, endoscopy, arthroscopy, hysteroscopy, cystoscopy, transplant, or bariatric surgery.

RESULTS

Ten studies out of 3409 screened papers, from eight LMIC were eligible for inclusion in the final analysis, totaling 2497 patients. Most reported challenges were related to costs of equipment and training programmes, equipment problems such as faulty equipment, and access to surgical kits. Training-related challenges were reliance on foreign trainers and lack of locally trained surgeons and theatre staff. The benefits of introducing laparoscopic surgery were economic and clinical, including a reduction in hospital stay, complications, and morbidity/mortality. The introduction of laparoscopic surgery also provided training opportunities for junior doctors.

CONCLUSION

Despite financial and technical challenges, many studies emphasise the overall benefit of introducing laparoscopic surgery in LMICs such as reduced hospital stay and the related lower cost for patients. While many of the clinical centres in LMICs have proposed practical solutions to the challenges reported, more support is critically required, in particular regarding training.

Examining medical student volunteering during the COVID-19 pandemic as a prosocial behaviour during an emergency

PURPOSE

Understanding the factors that influence prosocial behaviour during the COVID-19 pandemic is essential due to the disruption to healthcare provision.

METHODS

We conducted an in-depth, mixed-methods cross-sectional survey, from 2 May 2020 to 15 June 2020, of medical students at medical schools in the United Kingdom. Data analysis was informed by Latané and Darley's theory of prosocial behaviour during an emergency.

RESULTS

A total of 1145 medical students from 36 medical schools responded. Although 947 (82.7%) of students were willing to volunteer, only 391 (34.3%) had volunteered. Of the students, 92.7% understood they may be asked to volunteer; however, we found deciding one's responsibility to volunteer was mitigated by a complex interaction between the interests of others and self-interest. Further, concerns revolving around professional role boundaries influenced students' decisions over whether they had the required skills and knowledge.

CONCLUSION

We propose two additional domains to Latané and Darley's theory that medical students consider before making their final decision to volunteer: 'logistics' and 'safety'. We highlight modifiable barriers to prosocial behaviour and provide suggestions regarding how the conceptual framework can be operationalized within educational strategies to address these barriers. Optimizing the process of volunteering can aid healthcare provision and may facilitate a safer volunteering process. Key messages  What is already known on this topic: There is a discrepancy between the number of students willing to volunteer during pandemics and disasters, and those who actually volunteer. Understanding the factors that influence prosocial behaviour during the current COVID-19 pandemic and future pandemics and disasters is essential. What this study adds: We expanded on Latané and Darley's theory of prosocial behaviour in an emergency and used this to conceptualize students' motivations to volunteer, highlighting a number of modifiable barriers to prosocial behaviour during the COVID-19 pandemic. How this study might affect research, practice, or policy: We provide suggestions regarding how the conceptual framework can be operationalized to support prosocial behaviours during emergencies for the ongoing COVID-19 pandemic and future crises.

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

BACKGROUND

Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres.

METHODS

This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low-middle-income countries.

RESULTS

In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of 'single-use' consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low-middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia.

CONCLUSION

This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high- and low-middle-income countries.

Clinical support during covid-19: An opportunity for service and learning? A cross-sectional survey of UK medical students

PURPOSE

Medical students providing support to clinical teams during Covid-19 may have been an opportunity for service and learning. We aimed to understand why the reported educational impact has been mixed to inform future placements.

METHODS

We conducted a cross-sectional survey of medical students at UK medical schools during the first Covid-19 'lockdown' period in the UK (March-July 2020). Analysis was informed by the conceptual framework of service and learning.

RESULTS

1245 medical students from 37 UK medical schools responded. 57% of respondents provided clinical support across a variety of roles and reported benefits including increased preparedness for foundation year one compared to those who did not (p < 0.0001). However, not every individual's experience was equal. For some, roles complemented the curriculum and provided opportunities for clinical skill development, reflection, and meaningful contribution to the health service. For others, the relevance of their role to their education was limited; these roles typically focused on service provision, with few opportunities to develop.

CONCLUSION

The conceptual framework of service and learning can help explain why student experiences have been heterogeneous. We highlight how this conceptual framework can be used to inform clinical placements in the future, in particular the risks, benefits, and structures.[Box: see text].

The Role of Preoperative Imaging in the Detection of Lateral Lymph Node Metastases in Rectal Cancer: A Systematic Review and Diagnostic Test Meta-analysis

BACKGROUND

Different techniques exist for the imaging of lateral lymph nodes in rectal cancer.

OBJECTIVE

This study aimed to compare the diagnostic accuracy of pelvic MRI, 18 F-FDG-PET/CT, and 18 F-FDG-PET/MRI for the identification of lateral lymph node metastases in rectal cancer.

DATA SOURCES

Data sources include PubMed, Embase, Cochrane Library, and Google Scholar.

STUDY SELECTION

All studies evaluating the diagnostic accuracy of pelvic MRI, 18 F-FDG-PET/CT, and 18 F-FDG-PET/MRI for the preoperative detection of lateral lymph node metastasis in patients with rectal cancer were selected.

INTERVENTIONS

The interventions were pelvic MRI, 18 F-FDG-PET/CT, and/or 18 F-FDG-PET/MRI.

MAIN OUTCOME MEASURES

Definitive histopathology was used as a criterion standard.

RESULTS

A total of 20 studies (1,827 patients) were included out of an initial search yielding 7,360 studies. The pooled sensitivity of pelvic MRI was 0.88 (95% CI, 0.85-0.91), of 18 F-FDG-PET/CT was 0.83 (95% CI, 0.80-0.86), and of 18 F-FDG-PET/MRI was 0.72 (95% CI, 0.51-0.87) for the detection of lateral lymph node metastasis. The pooled specificity of pelvic MRI was 0.85 (95% CI, 0.78-0.90), of 18 F-FDG-PET/CT was 0.95 (95% CI, 0.86-0.98), and of 18 F-FDG-PET/MRI was 0.90 (95% CI, 0.78-0.96). The area under the curve was 0.88 (95% CI, 0.85-0.91) for pelvic MRI and was 0.83 (95% CI, 0.80-0.86) for 18 F-FDG-PET/CT.

LIMITATIONS

Heterogeneity in terms of patients' populations, definitions of suspect lateral lymph nodes, and administration of neoadjuvant treatment.

CONCLUSIONS

For the preoperative identification of lateral lymph node metastasis in rectal cancer, this review found compelling evidence that pelvic MRI should constitute the imaging modality of choice. In contrast, to confirm the presence of lateral lymph node metastasis, 18 F-FDG-PET/MRI modalities allow discarding false positive cases because of increased specificity.

PROSPERO REGISTRATION NUMBER

CRD42020200319.

231 Diagnostic Outcomes in Suspected Appendicitis Before and During the COVID-19 Pandemic

Introduction

Routine operative treatment of appendicitis was temporarily interrupted during the COVID-19 pandemic. Non-operative management in suspected appendicitis makes a definitive diagnosis difficult. This study investigated diagnostic outcomes of suspected appendicitis patients before and during COVID-19.

Method

A retrospective review of patients aged 16–45 undergoing treatment for suspected appendicitis pre-COVID-19 (1st January 2019–1st January 2020) and during the COVID-19 pandemic (1st March 2020 to 31st June 2020) was performed. Patients were followed up for one year (31st June 2021) to explore diagnostic outcomes.

Results

At one year follow up, 206 patients were identified in the pre-COVID-19 cohort with 100% (n = 206) undergoing an appendicectomy. On histopathological examination 77.2% (n = 159) had appendicitis; 10.7% (n = 22) another pathology; 2.9% (n = 6) neuroendocrine tumour. There were 62 patients in the COVID-19 cohort in which 79% (n = 49) underwent appendicectomy (56% (n = 35) immediate appendicectomy; 23% (n = 13) interval appendicectomy). On histopathological examination 61% (n = 38) had appendicitis; 13% (n = 8) another pathology; 5% (n = 3) neuroendocrine tumour.

Of the remaining 13/62 patients, one had undergone a CT scan and colonoscopy for gastrointestinal symptoms demonstrating signs of chronic caecal inflammation treated conservatively. One underwent a CT scan alone for gastrointestinal symptoms finding no pathology. The remaining 11/62 patients had no further reported symptoms or diagnostics.

Conclusions

This study demonstrates that the risk of appendiceal malignancy and chronic inflammation is important in non-operative management of suspected appendicitis and establishing consistent follow up pathways is essential.

Strategies for giving feedback in the operating room

Feedback is crucial to learning and is a difficult concept to define, occurring as a consequence of learner performance with the ultimate aim of influencing change in the learner. Here, we discuss strategies for giving feedback in the operating room revolving around the following themes: encouraging a sociocultural process, forming an educational alliance, sharing training goals, finding the appropriate time, giving task-specific feedback, approaching unsatisfactory performance and providing follow-up. It is essential that surgeons understand the fundamental feedback theories at play in the operating room described in this article and how they influence surgical training at all stages.

Strategies for giving feedback in the operating room

Feedback is crucial to learning and is a difficult concept to define, occurring as a consequence of learner performance with the ultimate aim of influencing change in the learner. Here, we discuss strategies for giving feedback in the operating room revolving around the following themes: encouraging a sociocultural process, forming an educational alliance, sharing training goals, finding the appropriate time, giving task-specific feedback, approaching unsatisfactory performance and providing follow-up. It is essential that surgeons understand the fundamental feedback theories at play in the operating room described in this article and how they influence surgical training at all stages.

P-L17 Post-liver transplant inferior vena cava stenosis in a large volume UK centre

Background

Inferior vena cava stenosis (IVCS) is a rare complication of liver transplantation with a reported incidence rate of 3%. Limited clinical consensus exists on the management of IVCS. We report the management and outcomes of patients with IVCS at our transplant centre. 

Methods

Relevant data were collected from adult patients who underwent liver transplantation at our centre between October 2014 and August 2020. These included demographics, investigation and management details with regards to IVCS. Values presented as % of total and median with interquartile range (IQR). 

Results

A total of 636 liver transplants were performed during the study period, of which 48 (7.6%) patients were investigated for possible IVCS. Of those, 14 (2.2% of total) were found to have IVCS, 85.7% (n = 12) were female. Only 2/14 were re-transplants and pre-transplant portal vein thrombus was present in 3 cases (21.4%). 10 livers (71.4%) were DBD donors. Normothermic machine perfusion was used in 4/14 patients. All 14 recipients found to have IVCS had had an implantation using a modified piggyback cavocavostomy technique. The IVCS was identified at a median of 25.5 days (19.7-30.8 days) following transplantation within the suprahepatic IVC in 92.9% (n = 13). Hemi-azygos collateralisation was seen in 4 cases (28.6%). 8 of the 14 recipients underwent intervention for IVCS, 6 patients were managed with balloon venoplasty, 1 patient required an IVC stent and 1 was managed surgically. Six of the recipients with IVCS died, 4 of whom had an intervention for their stenosis and 3 of these were within 90 days of their transplant. Pressures measured at the anastomotic stricture were higher in those who succumbed (median of 21 Vs 12.5 mmHg; p=.017). 

Conclusions

At our centre, cava-replacement technique was not associated with IVCS. Patients with more significant strictures (as evidenced by higher pressures at the anastomotic stenosis) may have an increased mortality risk.

Extracellular vesicles in kidney transplantation: a state-of-the-art review

Kidney transplantation is the optimal treatment for patients with kidney failure; however, early detection and timely treatment of graft injury remain a challenge. Precise and noninvasive techniques of graft assessment and innovative therapeutics are required to improve kidney transplantation outcomes. Extracellular vesicles (EVs) are lipid bilayer-delimited particles with unique biosignatures and immunomodulatory potential, functioning as intermediaries of cell signalling. Promising evidence exists for the potential of EVs to develop precision diagnostics of graft dysfunction, and prognostic biomarkers for clinician decision making. The inherent targeting characteristics of EVs and their low immunogenic and toxicity profiles combined with their potential as vehicles for drug delivery make them ideal targets for development of therapeutics to improve kidney transplant outcomes. In this review, we summarize the current evidence for EVs in kidney transplantation, discuss common methodological principles of EV isolation and characterization, explore upcoming innovative approaches in EV research, and discuss challenges and opportunities to enable translation of research findings into clinical practice.

729 “I Don’t Feel Like I’m Learning How to Be A Doctor:” The Impact of Disruptions Due to Covid-19 On Professional Identity Formation in UK Medical Students

Introduction

Professional identity formation (PIF) is a priority of medical training. Covid-19 caused disruption to medical education. We ask how this disruption impacted PIF through the lens of the activities performed – or not performed – by medical students during the first wave of the covid-19 pandemic, and perceptions of conflicts between activities.

Method

A pragmatic survey was distributed in spring 2020. Thematic analysis was performed of qualitative responses to two open questions. A social constructivist approach linked participants’ comments to PIF theory.

Results

We analysed 928 responses. Three themes surrounding students’ activities during covid-19 and their impact on identity were constructed:

Conflict arose at the intersections between these themes. Students noted lack of clinical exposure was detrimental, implicitly recognising that aspects of PIF require the clinical environment. Participants were keen to volunteer but struggled with balancing academic work. Participants worried about risk to their households and the wider community and wanted their skills to add value in the clinical environment. Volunteers felt frustrated when they were unable to perform tasks aligning with their identity as a future doctor. An exception was participants who worked as interim FY1s, aligned with the role of an FY1.

Conclusions

Medical students feel a duty to help during crises. Conflict arises when different aspects of their identity demand different actions. Care must be taken to nurture PIF during periods of disruption.

Does the Choice of Extraction Site During Minimally Invasive Colorectal Surgery Change the Incidence of Incisional Hernia? Protocol for a Systematic Review and Network Meta-Analysis

Background

Various sites are used for specimen extraction in oncological minimally invasive colorectal surgery. The objective is to determine if the choice of extraction site modulates the incidence of incisional hernia (IH).

Methods/design

A systematic review will be performed in accordance to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. MEDLINE, Embase and CENTRAL will be searched to look for original studies reporting the incidence of IH after minimally invasive colorectal surgery. Studies will be excluded from the analysis if: 1) they do not report original data, 2) the outcome of interest (incidence of incisional hernia) is not clearly reported and does not allow to extrapolate and/or calculate the required data for network meta-analysis, 3) they include pediatric patients, 4) they include a patients' population with a conversion rate to laparotomy >10%, 5) they do not compare at least two different extraction sites for the operative specimen, 6) they report patients who underwent pure (and not hybrid) natural orifice transluminal endoscopic surgery (NOTES). Network meta-analysis will be performed to determine the incidence of IH per extraction site.

Discussion

By determining which specimen extraction site leads to reduced rate of IH, this systematic review and network meta-analysis will help colorectal surgeons to choose their extraction site and reduce the morbidity and costs associated with IH.

Registration

The systematic review and meta-analysis protocol is registered in the International Prospective Register of Ongoing Systematic Reviews (PROSPERO) with number CRD42021272226.

Highlights

Various sites are used for specimen extraction in oncological minimally invasive colorectal surgery, and the choice of the site may probably modulate the incidence of incisional hernia.The present protocol aims to design a systematic review which will identify original studies comparing two extraction sites during minimally invasive colorectal surgery in terms of incidence of incisional hernia.Network meta-analysis will be performed to determine the incidence of IH per extraction site.

Systematic review of medical student willingness to volunteer and preparedness for pandemics and disasters

OBJECTIVE

This systematic review aimed to estimate the willingness of students to volunteer during a disaster, and how well-prepared medical students are for volunteering by assessing their knowledge and medical school curriculum of disaster and pandemic medicine.

RESULTS

A total of 37 studies met inclusion criteria including 11 168 medical students and 91 medical schools. 24 studies evaluated knowledge (64.9%), 16 evaluated volunteering (43.2%) and 5 evaluated medical school curricula (13.5%). Weighted mean willingness to volunteer during a disaster was 68.4% (SD=21.7%, range=26.7%-87.8%, n=2911), and there was a significant difference between those planning to volunteer and those who actually volunteered (p<0.0001). We identified a number of modifiable barriers which may contribute to this heterogeneity. Overall, knowledge of disasters was poor with a weighted mean of 48.9% (SD=15.1%, range=37.1%-87.0%, n=2985). 36.8% of 76 medical schools curricula included teaching on disasters. However, students only received minimal teaching (2-6 hours).

CONCLUSIONS

This study demonstrates that there is a large number of students who are willing to volunteer during pandemics. However, they are unlikely to be prepared for these roles as overall knowledge is poor, and this is likely due to minimal teaching on disasters at medical school. During the current COVID-19 pandemic and in future disasters, medical students may be required to volunteer as auxiliary staff. There is a need to develop infrastructure to facilitate this process as well as providing education and training to ensure students are adequately prepared to perform these roles safely.

Using a Scenario-Based Approach to Teaching Professionalism to Medical Students: Course Description and Evaluation

BACKGROUND

Doctors play a key role in individuals' lives undergoing a holistic integration into local communities. To maintain public trust, it is essential that professional values are upheld by both doctors and medical students. We aimed to ensure that students appreciated these professional obligations during the 3-year science-based, preclinical course with limited patient contact.

OBJECTIVE

We developed a short scenario-based approach to teaching professionalism to first-year students undertaking a medical course with a 3-year science-based, preclinical component. We aimed to evaluate, both quantitatively and qualitatively, student perceptions of the experience and impact of the course.

METHODS

An interactive professionalism course entitled Entry to the Profession was designed for preclinical first-year medical students. Two scenario-based sessions were created and evaluated using established professionalism guidance and expert consensus. Quantitative and qualitative feedback on course implementation and development of professionalism were gathered using Likert-type 5-point scales and debrief following course completion.

RESULTS

A total of 70 students completed the Entry to the Profession course over a 2-year period. Feedback regarding session materials and logistics ranged from 4.16 (SD 0.93; appropriateness of scenarios) to 4.66 (SD 0.61; environment of sessions). Feedback pertaining to professionalism knowledge and behaviors ranged from 3.11 (SD 0.99; need for professionalism) to 4.78 (SD 0.42; relevance of professionalism). Qualitative feedback revealed that a small group format in a relaxed, open environment facilitated discussion of the major concepts of professionalism.

CONCLUSIONS

Entry to the Profession employed an innovative approach to introducing first-year medical students to complex professionalism concepts. Future longitudinal investigations should aim to explore its impact at various stages of preclinical, clinical, and postgraduate training.

Reducing ileus after colorectal surgery: A network meta-analysis of therapeutic interventions

BACKGROUND

Several treatment strategies for avoiding post-operative ileus have been evaluated in randomised controlled trials. This network meta-analysis aimed to explore the relative effectiveness of these different therapeutic interventions on ileus outcome measures.

METHODS

A systematic literature review was performed to identify randomized controlled trials (RCTs) comparing treatments for post-operative ileus following colorectal surgery. A Bayesian network meta-analysis was performed using the Markov chain Monte Carlo method. Direct and indirect comparisons of all regimens were simultaneously compared using random-effects network meta-analysis.

RESULTS

A total of 48 randomised controlled trials were included in this network meta-analysis reporting on 3614 participants. Early feeding was found to be the best treatment for time to solid diet tolerance and length of hospital stay with a probability of P = 0.96 and P = 0.47, respectively. Early feeding resulted in significantly shorter time to solid diet tolerance (Mean Difference (MD) 58.85 h; 95% Credible Interval (CrI) -73.41, -43.15) and shorter length of hospital stay (MD 2.33 days; CrI -3.51, -1.18) compared to no treatment. Epidural analgesia was ranked best treatment for time to flatus (P = 0.29) and time to stool (P = 0.268). Epidural analgesia resulted in significantly shorter time to flatus (MD -18.88 h; CrI -33.67, -3.44) and shorter time to stool (MD -26.05 h; 95% CrI -66.42, 15.65) compared to no intervention. Gastrograffin was ranked best treatment to avoid the requirement for post-operative nasogastric tube insertion (P = 0.61) however demonstrated limited efficacy (OR 0.50; CrI 0.143, 1.621) compared to no intervention. Nasogastric and nasointestinal tube insertion, probiotics, and acupuncture were found to be least efficacious as interventions to reduce ileus.

CONCLUSION

This network meta-analysis identified early feeding as the most efficacious therapeutic intervention to reduce post-operative ileus in patients undergoing colorectal surgery, in addition to highlighting other therapies that require further investigation by high quality study. In patients undergoing colorectal surgery, emphasis should be placed on early feeding as soon as can be appropriately initiated to support the return of gastrointestinal motility.

986 A Systematic Review of Medical Student Willingness to Volunteer and Preparedness for Pandemics and Disasters

Introduction

We aimed to identify motivators and barriers to volunteering during a disaster and knowledge and medical school curriculum of disaster and pandemic medicine.

Method

We systematically searched the literature on 28/6/2020, following PRISMA guidelines.

Results

A total of 37 studies met inclusion criteria including 11,168 medical students and 91 medical schools. 24 studies evaluated knowledge (64.9%), 16 evaluated volunteering (43.2%), and five evaluated medical school curricula (13.5%). Weighted mean willingness to volunteer during a disaster was 68.4% (SD = 21.7%, n = 2911), and there was a significant difference between those planning to volunteer and those who actually volunteered (P<.001). We identified a number of modifiable barriers which may contribute to this difference. Overall, knowledge of disasters was poor with a weighted mean of 48.9% (SD = 15.1%, n = 2985).

Conclusions

There is a large number of students who are willing to volunteer during pandemics. However, they are likely to be under-prepared for these roles due to poor overall knowledge and limited teaching. During the current COVID-19 pandemic and in future disasters, medical students may be required to volunteer as auxiliary staff. Medical schools need to develop infrastructure to facilitate this process as well as providing education and training to ensure students are adequately prepared for these roles.

967 COVID READY Study: Cross-Sectional Survey of Medical Students Volunteering During the Coronavirus Pandemic (COVID-19) In the United Kingdom

Introduction

We aimed to identify the willingness, attitudes, and practice of medical students towards volunteering in a clinical capacity during the COVID-19 pandemic.

Method

We distributed a cross-sectional survey from 2/5/2020 to 14/6/2020 to all medical students at UK medical schools.

Results

A total of 1145 medical students from 36 medical schools completed the questionnaire. 82.7% of students were willing to volunteer, but only 34.3% had volunteered. The strongest predictors of willingness to volunteer on multiple linear regression were the beliefs that volunteering to work would benefit their medical education (estimate=0.35±0.03, adjusted P < 0.001) and that they would have a positive impact (estimate=0.33±0.03, adjusted P < 0.001). The majority of students were willing to take up a clinical role and were confident in having the necessary skills, but there was a discrepancy between the role’s students were comfortable performing and those they were assigned. Thematic analysis of the issue’s students would face when volunteering identified five themes: safety, professional practice, pressure to volunteer, finances and logistics, and education.

Conclusions

This study identifies areas for consideration from those responsible for workforce planning, healthcare provision, and student safety. We provide recommendations to facilitate a volunteering process that is safer for students, staff, and patients.

11 A Sequential Simulation Experience for Interim Foundation Doctors and Analysis of Preparedness to Practice Early

Introduction

Covid-19 necessitated the early graduation of medical students to join the healthcare workforce as Foundation Interim Year 1 (FiY1) doctors. A sequential simulation session was implemented to improve and assess FiY1 preparedness towards approaching deteriorating patients.

Method

12 FiY1 doctors participated in the session containing three sequential major stations: complex new admission, ward-based management, and acute deterioration. Participants interpreted investigations, performed examinations, created management plans, and escalated using a pager.

Results

There was a significant improvement in preparedness for giving treatment (median(IQR): pre-simulation 3(3-4) vs. post-simulation 4(4-4.75); p = 0.04) and paperwork (2(2-3.75) vs. 4(3.25-4.75); p = 0.03). Following four weeks of FiY1 participants demonstrated significant improvement in preparedness for giving treatment (median(IQR): pre-simulation 3(3-4) vs. post-FiY1 4.5(4-5); p = 0.01), communication and teamworking (4(3.25-4.75) vs. 5(5-5.75); p = 0.01), and paperwork (2(2-3.75) vs. 5(5-5); p = 0.01). The FiY1 programme improved integration within teams and facilitated training whilst medical school placements left participants feeling apprehensive and unprepared to practice.

Conclusions

This session provided an engaging method of increasing preparedness towards common challenges new physicians face. This study suggests future senior medical student apprenticeships should give the same investment, opportunities, and responsibilities as that of the FiY1 programme.

COVIDReady2 study protocol: cross-sectional survey of medical student volunteering and education during the COVID-19 pandemic in the United Kingdom

BACKGROUND

The coronavirus disease 2019 pandemic has led to global disruption of healthcare. Many students volunteered to provide clinical support. Volunteering to work in a clinical capacity was a unique medical education opportunity; however, it is unknown whether this was a positive learning experience or which volunteering roles were of most benefit to students.

METHODS

The COVIDReady2 study is a national cross-sectional study of all medical students at medical schools in the United Kingdom. The primary outcome is to explore the experiences of medical students who volunteered during the pandemic in comparison to those who did not. We will compare responses to determine the educational benefit and issues they faced. In addition to quantitative analysis, thematic analysis will be used to identify themes in qualitative responses.

DISCUSSION

There is a growing body of evidence to suggest that service roles have potential to enhance medical education; yet, there is a shortage of studies able to offer practical advice for how these roles may be incorporated in future medical education. We anticipate that this study will help to identify volunteer structures that have been beneficial for students, so that similar infrastructures can be used in the future, and help inform medical education in a non-pandemic setting.

TRIAL REGISTRATION

Not Applicable.

P8 A single centre evaluation of risk prediction models and imaging modalities in acute appendicitis

Objective

Patients with suspected appendicitis remain a diagnostic challenge. This study aims to validate risk prediction models and to investigate diagnostic accuracy of ultrasonography (US) and computed tomography (CT) in adults undergoing an appendicectomy.

Materials and Methods

A retrospective case review of patients aged 16-45 undergoing an appendicectomy between January 2019 to January 2020 at a tertiary referral centre was performed. Primary outcomes were the accuracy of a high-risk appendicitis risk score and US and CT imaging modalities when compared to histological reports following appendicectomy.

Results

A total of 206 patients (107/205, 51.9% women) were included. Removal of histologically normal appendix was equally likely in men and women (13.1 versus 11.2%, relative risk 1.17, 95% c.i. 0.56 to 2.44; P =0.67). A high-risk appendicitis score correctly identified 84.0% (79/94) of cases in men and 85.9% (67/78) of cases in women. US was reported as equivocal in 85.7% (18/21) of low-risk women and 59.0% (23/39) of high-risk women. CT in low-risk women resulted in 25.0% (2/8) equivocal results whilst correctly diagnosing (5/6) or excluding (1/2) appendicitis in 75.0% of the total cohort (6/8). In high-risk women CT resulted in 3.8% (1/26) equivocal results whilst correctly detecting (22/23) or excluding (1/3) appendicitis in 88.5% of total high-risk patients (23/26).

Conclusions

This study suggests that risk prediction models may be useful in both women and men to identify appendicitis. US imaging gave high rates of equivocal results and should not be relied upon for the diagnosis of appendicitis but may be useful to exclude other differential diagnoses. CT imaging is a highly accurate diagnostic tool and could be considered in those at low-risk where clinical suspicion remains to reduce negative appendicectomy rates.

P78 MedEd Collaborative: a new research collaborative to promote medical education research

Introduction

In response to the disruption to medical education caused by COVID-19, there is a need for wide-scale robust medical education research and the generation of research capacity for the future. Trainee research collaboratives have demonstrated they can nurture the research skills of students and trainees while delivering high quality research outputs. However, we have been unable to identify a permanent medical education research collaborative for trainees and students.

Methods

We started the MedEd Collaborative in September 2020 to fill this gap, consisting of a trainee- and student-led medical education research collaborative supported by senior medical education experts and clinicians.

Results

Our vision is to increase engagement of students and trainees in high-quality medical education research that informs practice. The MedEd Collaborative will engage students and trainees in medical education research by completing at least one national multicentre study per year, the first being the COVID Ready 2 study. This is a national cross-sectional survey of the educational impact of medical student volunteering during the COVID-19 pandemic.

Conclusions

We anticipate the MedEd collaborative will: increase exposure to medical education research, thereby increasing the number of medical students and trainees aiming to pursue an academic medical education career; provide training in medical education research methodologies, such as qualitative analysis; improve the quality of medical education research outputs from students and trainees; encourage collaboration between medical schools and deaneries; and provide support to other trainee research collaboratives that aim to explore education research in their own specialties.

P39 Cross sectional survey of medical student volunteering and education during the coronavirus pandemic in the United Kingdom

Introduction

COVID-19 led to global disruption of healthcare and many students volunteered to provide clinical support. Volunteering to work was a unique medical education opportunity; however, it is unknown whether this was a positive learning experience.

Methods

The COVID Ready 2 study is a national cross-sectional study of all medical students at UK medical schools. We will compare opinions of those who did and did not volunteer to determine the educational benefit and issues they faced. We will use thematic analysis to identify themes in qualitative responses, in addition to quantitative analysis.

Results

The primary objective is to explore the effect of volunteering during the pandemic on medical education in comparison to those who did not volunteer. Our secondary objectives are to identify: whether students would be willing to assume similar roles in a non-pandemic setting; if students found the experience more or less beneficial than traditional hospital placements and reasons for this; what the perceived benefits and disadvantages of volunteering were; the difference in perceived preparedness between students who did and did not volunteer for foundation training year one and the next academic year; training received by volunteers; and to explore issues associated with volunteering, including safety issues and issues with role and competence.

Conclusions

We anticipate this study will help identify volunteer structures that have been beneficial for students, so that similar infrastructures can be used in the future; and help determine whether formal voluntary roles should be introduced into the non-pandemic medical curriculum.

P21 Appendicitis during the COVID-19 pandemic: to operate or not to operate, that is the question

Background

During the Covid-19 pandemic, non‐operative management for acute appendicitis (AA) was implemented in the UK. Aim of this study was to determine the efficacy and outcomes of conservative versus surgical management of AA during the pandemic.

Materials & Methods

We conducted an observational study in a tertiary referral centre. Data was collected from patients (≥16 years) with a diagnosis of AA between 1st November 2019 to 10th March 2020 (pre-COVID period) and 10th March 2020 to 5th July 2020 (COVID period).

Results

A total of 116 patients in the pre-COVID period were included versus 91 in the COVID period. 43.1% (n = 50) of patients pre-COVID were classified as ASA 2 compared to 26.4% (n = 24) during the COVID period (p-value=0.042). 72.5% (n = 66) of the patients during the COVID period scored as high risk using the Alvarado score compared to 24.1% (n = 28) in the pre-COVID period (p-value<0.001). We observed a significant increase in radiological evaluation, 69.8% versus 87.5% of patients had a CT in the pre-COVID and COVID periods respectively (p-value=0.008). 94.9% of patients were managed operatively in the pre-COVID period compared to 60.4% in the COVID period (p-value<0.001). We observed more open appendicectomies (37.3% versus 0.9%; p-value<0.001) during the COVID period compared to the pre-COVID period. More abscess formation and free fluid were found intraoperatively in the COVID period (p-value= 0.021 and 0.023 respectively). Re-attendance rate due to appendicitis-related issues was significantly higher in the COVID period (p = 0.027).

Conclusion

Radiological diagnosis of AA was more frequent during the COVID period. More conservative management for AA was employed during the COVID-19 pandemic, and for those managed operatively an open approach was preferred. Intra-operative findings were suggestive of delayed presentation during the COVID period without this affecting the length of hospital stay.

A foundation interim year 1 sequential simulation experience and analysis of preparedness to practice early

This project involved the implementation of a simulation session followed by interviews to assess and improve foundation interim year 1 (FiY1) preparedness. The session focused on the interpretation of investigations, clinical examinations, the implementation of management plans and appropriate escalation. Preparedness was measured quantitatively using Likert-type scales and qualitatively using interviews. Following the simulation, there was a significant increase in median preparedness for giving treatment (3 vs 4; p=0.04), paperwork (2 vs 4; p=0.03) and independent, responsible working (3 vs 4.5; p=0.03), before and after, respectively. Following the FiY1 period, participants demonstrated significant improvement in median preparedness for giving treatment (3 vs 4.5; p=0.01), paperwork (2 vs 5; p=0.01), independent, responsible working (3 vs 4.5; p=0.02), and communication and teamworking (4 vs 5; p=0.01), before and after, respectively. This simulation and the FiY1 period increased preparedness. This study suggests that future medical apprenticeships should provide the same opportunities and responsibilities as the FiY1 programme.

A new clinical presentation: breast implant pneumocapsule and pneumothorax following penetrating chest wall trauma

Pneumothorax resulting from traumatic thoracic injury is a potentially life-threatening emergency requiring prompt recognition and management with an intercostal drain. A 34-year-old woman was brought into the emergency department after sustaining a stab injury to the right upper outer quadrant of the right breast. She described noticing a jelly-like substance from her wound, on the background of a prior cosmetic breast augmentation. On examination, it was noted that the right breast was significantly swollen. Computed tomography demonstrated a large right sided pneumothorax with associated punctured right breast implant, a 'pneumocapsule' and extensive subcutaneous emphysema of the breast. This case highlights that the fibrous tissue capsule around a breast implant can function as an anatomical space in continuity with the thoracic cavity, masking the diagnosis of pneumothorax in penetrating trauma.

A single centre evaluation of risk prediction models and imaging modalities in acute appendicitis

INTRODUCTION

Patients with suspected appendicitis remain a diagnostic challenge. The aim of this study was to validate risk prediction models, and to investigate diagnostic accuracy of ultrasonography and computed tomography (CT) in adults undergoing appendicectomy.

METHODS

A retrospective case review was performed of patients aged 16-45 years having an appendicectomy between January 2019 and January 2020 at a tertiary referral centre. Primary outcomes were the accuracy of a high risk appendicitis risk score and ultrasonography and CT imaging modalities compared with histological reports following appendicectomy.

RESULTS

A total of 206 patients (52% female) were included in the study. Removal of a histologically normal appendix was equally likely in men and women (13.1% vs 11.2% respectively, relative risk: 1.17, 95% confidence interval: 0.56-2.44, p=0.674). A high risk appendicitis score correctly identified 84.0% (79/94) of cases in men and 85.9% (67/78) of cases in women. Ultrasonography was reported as equivocal in 85.7% (18/21) of low risk women and 59.0% (23/39) of high risk women. CT correctly detected or excluded appendicitis in 75.0% (6/8) of low risk women and 88.5% (23/26) of high risk women.

CONCLUSIONS

This study suggests that risk prediction models may be useful in both women and men to identify appendicitis. Ultrasonography gave high rates of equivocal results and should not be relied on for the diagnosis of appendicitis. CT is a highly accurate diagnostic tool and could be considered in those at low risk where clinical suspicion remains to reduce negative appendicectomy rates.

Dataset of prefrontal transcranial direct-current stimulation to improve early surgical knot-tying skills

Transcranial direct-current stimulation (tDCS) has previously demonstrated promising effects in improving surgical performance with motor region stimulation [1], [2], [3], [4]. However, extensive prior research has revealed an important role of the prefrontal cortex in surgical skill development [5,6]. This article presents the data of a double-blind randomized sham-controlled trial investigating the effect of prefrontal tDCS on knot-tying performance [7]. Data was collected from an active (n = 20) and sham (n = 20) group across three blocks: pre-, online- (during) and post-tDCS. Group and block differences of knot-tying performance were analyzed using a Generalized linear mixed model and supported with a Friedman's test. Further sub-analyses were conducted to compare high vs. low skilled individuals and initial vs. last knots. Subjective workload was assessed after each block using a SURG-TLX questionnaire and side-effects of the tDCS block were recorded using an additional survey.

Acute appendicitis management during the COVID-19 pandemic: A prospective cohort study from a large UK centre

BACKGROUND

During the Covid-19 pandemic, non-operative management for acute appendicitis (AA) was implemented in the UK. The aim of this study was to determine the efficacy and outcomes of conservative versus surgical management of AA during the pandemic.

MATERIALS & METHODS

We conducted an observational study in a tertiary referral centre. Data was collected from all patients (≥16 years) with a diagnosis of AA between November 1, 2019 to March 10, 2020 (pre-COVID period) and March 10, 2020 to July 5, 2020 (COVID period).

RESULTS

A total of 116 patients in the pre-COVID period were included versus 91 in the COVID period. 43.1% (n = 50) of patients pre-COVID were classified as ASA 2 compared to 26.4% (n = 24) during the COVID period (p-value = 0.042). 72.5% (n = 66) of the patients during the COVID period scored as high risk using the Alvarado score compared to 24.1% (n = 28) in the pre-COVID period (p-value<0.001). We observed a significant increase in radiological evaluation, 69.8% versus 87.5% of patients had a CT in the pre-COVID and COVID periods respectively (p-value = 0.008). 94.9% of patients were managed operatively in the pre-COVID period compared to 60.4% in the COVID period (p-value<0.001). We observed more open appendicectomies (37.3% versus 0.9%; p-value<0.001) during the COVID period compared to the pre-COVID period. More abscess formation and free fluid were found intraoperatively in the COVID period (p-value = 0.021 and 0.023 respectively). Re-attendance rate due to appendicitis-related issues was significantly higher in the COVID period (p = 0.027).

CONCLUSION

Radiological diagnosis of AA was more frequent during the COVID period. More conservative management for AA was employed during the COVID-19 pandemic, and for those managed operatively an open approach was preferred. Intra-operative findings were suggestive of delayed presentation during the COVID period without this affecting the length of hospital stay.

Unusual presentation of appendicitis as soft tissue infection of the thigh

Appendicitis remains one of the most common causes of abdominal pain across the world typically presenting with right iliac fossa pain, fever and nausea or vomiting. We describe an unusual case of appendicitis presenting as a soft tissue infection of the thigh, thereby causing a delayed diagnosis from presentation. We discuss the pathophysiological process behind soft tissue infections caused by appendicitis and highlight investigation and management strategies to ensure prompt treatment to reduce patient mortality.

A Systematic Review of Trauma Crew Resource Management Training: What Can the United States and the United Kingdom Learn From Each Other?

OBJECTIVE

Crew Resource Management (CRM) training incorporates methods such as simulation, debrief, and teamwork training to emphasize human factors skills. This systematic review aimed to assess differences in CRM between UK and USA trauma personnel.

DESIGN

A structured search of the databases MEDLINE and Embase in addition to unstructured reference review and Google Scholar search was undertaken without time restraint to identify articles describing CRM training courses of trauma personnel. Predetermined criteria for inclusion included comprehensive reports of CRM training in trauma personnel with participant assessment. Articles were analyzed for course details and descriptions, Kirkpatrick domains and levels utilized, and measure items and outcomes.

RESULTS

Twenty-nine full-text articles (24 USA, 5 UK) met predetermined criteria. UK-based CRM had a heavy emphasis on doctors while USA-based CRM reached a range of multidisciplinary civilian and military professionals. UK-based CRM focused on skills outcomes using pre- and post-training questionnaires, whereas USA-based training focused on behavior and nontechnical skills utilizing validated standardized measures. CRM-based training, and particularly courses incorporating simulation and multidisciplinary methods, resulted in significantly improved preparedness for trauma, emergency skills, and clinical behavioral change.

CONCLUSIONS

CRM training has the potential to give significant benefits to participant learning, teamwork behaviors, and clinical care outcomes. The USA appears to utilize a focused multidisciplinary and human factors approach to trauma training, which could be adopted by UK institutions to improve cohesive team performance and patient care.

Ligation Alone Versus Immediate Revascularization for Femoral Artery Pseudoaneurysms Secondary to Intravascular Drug Use: A Systematic Review and Meta-Analysis

BACKGROUND

Femoral artery pseudoaneurysms (FA-PSAs) remain a common vascular aneurysmal pathology associated with intravascular drug use (IVDU). To date no internationally agreed consensus regarding optimal surgical management of FA-PSAs exists. The aim of this systematic review and meta-analysis was to determine the optimal surgical treatment of FA-PSAs associated with IVDU.

METHODS

A systematic search was undertaken following PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) guidelines identifying original studies reporting outcomes of ligation-debridement and/or excision-revascularization of FA-PSAs secondary to IVDU. Outcomes of interest were 30-day mortality, incidence of amputation at 12 months, chronic limb threatening ischemia (CLTI) at any follow-up appointment, reintervention, and bleeding.

RESULTS

A total of 39 cohort studies describing 1,217 FA-PSA operative outcomes met inclusion criteria, 993 (81.6%) treated by ligation-debridement and 224 (18.4%) by excision-revascularization. The incidence of 30-day mortality was 0.8% (n = 8) and 1.3% (n = 3) in the ligation-debridement and excision-revascularization groups, respectively, with only one study reporting mortality in both groups. This meta-analysis found no difference in amputation (8.89% vs. 8.03%, odds ratio (OR) 0.74 95% confidence interval (CI) 0.35-1.56, P = 0.42, 11 studies) or CLTI (21.5% vs. 12.4%, OR 1.24 95% CI 0.35-4.38, P = 0.74, 9 studies) after ligation and debridement compared with excision and revascularization. There was a higher incidence of reintervention (24.7% vs. 10.6%, OR 0.31 [95% CI 0.16, 0.62], P = 0.0009, 13 studies) and rebleeding (7.1% vs. 1.6%, OR 0.61 [95% CI 0.16, 2.38], P = 0.48, 5 studies) after excision and revascularization compared with ligation alone.

CONCLUSIONS

For treatments of IVDU-related FA-PSAs, this study suggests no significant difference in association of mortality, incidence of amputation, or CLTI with ligation-debridement or excision-revascularization, but a significantly higher reintervention rate and greater rebleeding rate for revascularized patients.

Pneumomediastinum following spontaneous vaginal delivery: report of a rare phenomenon

Pneumomediastinum is the presence of mediastinal air, which raises concern for life-threatening conditions such as esophageal perforation and mediastinitis. Here, we described the case of a young female with no previous past medical history, who developed spontaneous pneumomediastinum following uncomplicated spontaneous vaginal delivery (SVD) giving birth to a healthy newborn at full term. The incidence of benign pneumomediastinum following SVD is estimated at 1 in 100 000 deliveries. This case explores the etiology of this rare presentation, recommends essential investigations and advises on pertinent clinical considerations.

Preparing medical students for a pandemic: a systematic review of student disaster training programmes

OBJECTIVE

To identify pandemic and disaster medicine-themed training programmes aimed at medical students and to assess whether these interventions had an effect on objective measures of disaster preparedness and clinical outcomes. To suggest a training approach that can be used to train medical students for the current COVID-19 pandemic.

RESULTS

23 studies met inclusion criteria assessing knowledge (n=18, 78.3%), attitude (n=14, 60.9%) or skill (n=10, 43.5%) following medical student disaster training. No studies assessed clinical improvement. The length of studies ranged from 1 day to 28 days, and the median length of training was 2 days (IQR=1-14). Overall, medical student disaster training programmes improved student disaster and pandemic preparedness and resulted in improved attitude, knowledge and skills. 18 studies used pretest and post-test measures which demonstrated an improvement in all outcomes from all studies.

CONCLUSIONS

Implementing disaster training programmes for medical students improves preparedness, knowledge and skills that are important for medical students during times of pandemic. If medical students are recruited to assist in the COVID-19 pandemic, there needs to be a specific training programme for them. This review demonstrates that medical students undergoing appropriate training could play an essential role in pandemic management and suggests a course and assessment structure for medical student COVID-19 training.

REGISTRATION

The search strategy was not registered on PROSPERO-the international prospective register of systematic reviews-to prevent unnecessary delay.

All hands on deck: early graduation of senior medical students in the COVID-19 pandemic

This article was migrated. The article was marked as recommended. During the COVID-19 pandemic, early graduation of senior medical students simultaneously offers useful clinical experience in preparation for junior doctor posts, whilst helping address staffing shortages due to illness or self-isolation. Having recently graduated early from medical school, we offer our reflections on the obstacles and opportunities associated with working in an uncharted clinical environment. We are not the only ones on a steep learning curve at this time: this pandemic will challenge and provide learning for staff of all levels.

Neuroenhancement in surgeons: benefits, risks and ethical dilemmas

Background

Surgeons traditionally aim to reduce mistakes in healthcare through repeated training and advancement of surgical technology. Recently, performance-enhancing interventions such as neurostimulation are emerging which may offset errors in surgical practice.

Methods

Use of transcranial direct-current stimulation (tDCS), a novel neuroenhancement technique that has been applied to surgeons to improve surgical technical performance, was reviewed. Evidence supporting tDCS improvements in motor and cognitive performance outside of the field of surgery was assessed and correlated with emerging research investigating tDCS in the surgical setting and potential applications to wider aspects of healthcare. Ethical considerations and future implications of using tDCS in surgical training and perioperatively are also discussed.

Results

Outside of surgery, tDCS studies demonstrate improved motor performance with regards to reaction time, task completion, strength and fatigue, while also suggesting enhanced cognitive function through multitasking, vigilance and attention assessments. In surgery, current research has demonstrated improved performance in open knot-tying, laparoscopic and robotic skills while also offsetting subjective temporal demands. However, a number of ethical issues arise from the potential application of tDCS in surgery in the form of safety, coercion, distributive justice and fairness, all of which must be considered prior to implementation.

Conclusion

Neuroenhancement may improve motor and cognitive skills in healthcare professions with impact on patient safety. Implementation will require accurate protocols and regulations to balance benefits with the associated ethical dilemmas, and to direct safe use for clinicians and patients.

Bed rest: outdated following traumatic solid organ injury?

INTRODUCTION

This systematic review aimed to evaluate early ambulation protocols implemented for traumatic solid organ injury.

METHODS

The electronic databases PubMed, Medline (Ovid), Embase and Cochrane Library were searched without time constraint to identify prospective and retrospective analyses, randomised controlled trials, cohort studies, and case series that investigated early ambulation in solid organ trauma.

RESULTS

Six studies met the predefined inclusion criteria and were reviewed. Three studies investigated early ambulation protocols in direct comparison with bed rest. The remaining three studies were early ambulation case series. In all studies there was no convincing evidence to suggest differences in clinical outcomes between early ambulation and bed rest protocols. In all studies early ambulation resulted in a reduced length of hospitalisation and decreased cost to national healthcare services.

CONCLUSIONS

This systematic review has found preliminary evidence that suggests bed rest has no clinical benefit in those with low-grade to mid-grade (grades 1-2) solid organ injury. Further studies are required to inform guidance to improve trauma patient outcomes.

Intersphincteric epidermoid inclusion cyst: report of a rare case

Epidermoid inclusion cysts of the perineal region are a rare entity, which require appropriate diagnosis and management. Here we describe the unusual case of a large protruding epidermoid inclusion cyst originating from the intersphincteric anal plane, which was mobilized and excised successfully. Essential investigations to ensure accurate diagnosis in addition to surgical technique to reduce recurrence and patient morbidity are described in this case report.

Opportunities and Obstacles for Providing Medical Education Through Social Media

Social media has infiltrated almost every sector of life, and medical education is no exception. As this technology becomes mainstream within society, an increasing number of health care students and professionals are using it for learning. Several important considerations for the risks of this technology are discussed here.

The Impact of Transcranial Direct Current Stimulation on Upper-Limb Motor Performance in Healthy Adults: A Systematic Review and Meta-Analysis

Background: Transcranial direct current stimulation (tDCS) has previously been reported to improve facets of upper limb motor performance such as accuracy and strength. However, the magnitude of motor performance improvement has not been reviewed by contemporaneous systematic review or meta-analysis of sham vs. active tDCS.

Objective: To systematically review and meta-analyse the existing evidence regarding the benefits of tDCS on upper limb motor performance in healthy adults.

Methods: A systematic search was conducted to obtain relevant articles from three databases (MEDLINE, EMBASE, and PsycINFO) yielding 3,200 abstracts. Following independent assessment by two reviewers, a total of 86 articles were included for review, of which 37 were deemed suitable for meta-analysis.

Results: Meta-analyses were performed for four outcome measures, namely: reaction time (RT), execution time (ET), time to task failure (TTF), and force. Further qualitative review was performed for accuracy and error. Statistically significant improvements in RT (effect size −0.01; 95% CI −0.02 to 0.001, p = 0.03) and ET (effect size −0.03; 95% CI −0.05 to −0.01, p = 0.017) were demonstrated compared to sham. In exercise tasks, increased force (effect size 0.10; 95% CI 0.08 to 0.13, p < 0.001) and a trend towards improved TTF was also observed.

Conclusions: This meta-analysis provides evidence attesting to the impact of tDCS on upper limb motor performance in healthy adults. Improved performance is demonstrable in reaction time, task completion time, elbow flexion tasks and accuracy. Considerable heterogeneity exists amongst the literature, further confirming the need for a standardised approach to reporting tDCS studies.

Use of Near-infrared Spectroscopy and Implantable Doppler for Postoperative Monitoring of Free Tissue Transfer for Breast Reconstruction: A Systematic Review and Meta-analysis

BACKGROUND

Failure to accurately assess the perfusion of free tissue transfer (FTT) in the early postoperative period may contribute to failure, which is a source of major patient morbidity and healthcare costs. This systematic review and meta-analysis aim to evaluate and appraise current evidence for the use of near-infrared spectroscopy (NIRS) and/or implantable Doppler (ID) devices compared with conventional clinical assessment (CCA) for postoperative monitoring of FTT in reconstructive breast surgery.

METHODS

A systematic literature search was performed in accordance with the preferred reporting items for systematic reviews guidelines. Studies in human subjects published within the last decade relevant to the review question were identified. Meta-analysis using random-effects models of FTT failure rate and STARD scoring was then performed on the retrieved publications.

RESULTS

Nineteen studies met the inclusions criteria. For NIRS and ID, the mean sensitivity for the detection of FTT failure is 99.36% and 100% respectively, with average specificity of 99.36% and 97.63%, respectively. From studies with sufficient reported data, meta-analysis results demonstrated that both NIRS [OR = 0.09 (0.02-0.36); P < 0.001] and ID [OR = 0.39 (0.27-0.95); P = 0.04] were associated with significant reduction of FTT failure rates compared with CCA.

CONCLUSIONS

The use of ID and NIRS provided equivalent outcomes in detecting FTT failure and were superior to CCA. The ability to acquire continuous objective physiological data regarding tissue perfusion is a perceived advantage of these techniques. Reduced clinical staff workload and minimized hospital costs are also perceived as positive consequences of their use.