Pituitary hypophysitis in granulomatosis with polyangiitis (GPA): a case series

Granulomatosis with polyangiitis (GPA) rarely involves the pituitary gland. Pituitary involvement has been reported in ~ 1% of all cases of GPA. Most commonly, pituitary swelling and inflammation results in symptoms due to pituitary mass effect and arginine vasopressin deficiency. To date, there are no pituitary-specific treatment guidelines for this rare condition. We present three patients with GPA-related hypophysitis highlighting the spectrum of pituitary involvement. All three patients were successfully treated with immunosuppressive regimens that included rituximab (RTX). Following remission induction with high-dose glucocorticoids, patients received 6 monthly RTX for remission maintenance. RTX was well tolerated without significant side effects.

Educational interventions for imposter phenomenon in healthcare: a scoping review

BACKGROUND

Imposter Phenomenon (IP) is a subjective feeling of intellectual fraudulence and self-doubt experienced by individuals in goal-orientated high-achieving professions. The impact of IP within healthcare has been associated with individual physical and mental health and concerns around training, career progression and DEI at an institutional level. To effectively address IP in healthcare, this scoping review aims to explore educational interventions designed to empower high-achieving individuals with the tools needed to confront and overcome IP.

METHODS

The scoping review adhered to a predetermined protocol informed by the JBI methodology and PRISMA-ScR guidelines in order to identify educational interventions addressing IP in high-achieving industries. Articles were searched across multiple databases, including MEDLINE (Ovid), PsychINFO, SCOPUS, and Web of Science, alongside grey literature, without imposing any time constraints. A systematic approach including a thematic analysis allowed for a nuanced exploration and interpretation of the identified educational interventions and their impact on addressing IP.

RESULTS

Seventeen articles were incorporated into the review, with the majority originating from the USA and majority being published since 2020. Ten studies targeted healthcare professionals, undergraduate and postgraduate healthcare students. Majority of studies aimed at addressing IP, featured a larger number of female participants than males. Workshops with self-reflection and group-guided exercises to overcome IP were the most popular educational interventions. Coaching and structured supervision were also suggested. Across all papers, three themes emerged for coping strategies: individual, peer-to-peer, and institutional.

CONCLUSIONS

This scoping review suggests how group and individual interventions such as workshops, small group discussions and coaching can be used to overcome IP in healthcare. Institutional changes like diversity promotion, supervisor education, and support networks are crucial in addressing IP. Further long term and speciality specific assessments are needed to measure impact. Overall, the review highlights how educational awareness and a variety of strategies can be implemented to create a supportive environment for professionals dealing with IP, promoting their well-being and success.

Effects of empagliflozin on progression of chronic kidney disease: a prespecified secondary analysis from the empa-kidney trial

BACKGROUND

Sodium-glucose co-transporter-2 (SGLT2) inhibitors reduce progression of chronic kidney disease and the risk of cardiovascular morbidity and mortality in a wide range of patients. However, their effects on kidney disease progression in some patients with chronic kidney disease are unclear because few clinical kidney outcomes occurred among such patients in the completed trials. In particular, some guidelines stratify their level of recommendation about who should be treated with SGLT2 inhibitors based on diabetes status and albuminuria. We aimed to assess the effects of empagliflozin on progression of chronic kidney disease both overall and among specific types of participants in the EMPA-KIDNEY trial.

METHODS

EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA), and included individuals aged 18 years or older with an estimated glomerular filtration rate (eGFR) of 20 to less than 45 mL/min per 1·73 m2, or with an eGFR of 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher. We explored the effects of 10 mg oral empagliflozin once daily versus placebo on the annualised rate of change in estimated glomerular filtration rate (eGFR slope), a tertiary outcome. We studied the acute slope (from randomisation to 2 months) and chronic slope (from 2 months onwards) separately, using shared parameter models to estimate the latter. Analyses were done in all randomly assigned participants by intention to treat. EMPA-KIDNEY is registered at ClinicalTrials.gov, NCT03594110.

FINDINGS

Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and then followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroups of eGFR included 2282 (34·5%) participants with an eGFR of less than 30 mL/min per 1·73 m2, 2928 (44·3%) with an eGFR of 30 to less than 45 mL/min per 1·73 m2, and 1399 (21·2%) with an eGFR 45 mL/min per 1·73 m2 or higher. Prespecified subgroups of uACR included 1328 (20·1%) with a uACR of less than 30 mg/g, 1864 (28·2%) with a uACR of 30 to 300 mg/g, and 3417 (51·7%) with a uACR of more than 300 mg/g. Overall, allocation to empagliflozin caused an acute 2·12 mL/min per 1·73 m2 (95% CI 1·83-2·41) reduction in eGFR, equivalent to a 6% (5-6) dip in the first 2 months. After this, it halved the chronic slope from -2·75 to -1·37 mL/min per 1·73 m2 per year (relative difference 50%, 95% CI 42-58). The absolute and relative benefits of empagliflozin on the magnitude of the chronic slope varied significantly depending on diabetes status and baseline levels of eGFR and uACR. In particular, the absolute difference in chronic slopes was lower in patients with lower baseline uACR, but because this group progressed more slowly than those with higher uACR, this translated to a larger relative difference in chronic slopes in this group (86% [36-136] reduction in the chronic slope among those with baseline uACR <30 mg/g compared with a 29% [19-38] reduction for those with baseline uACR ≥2000 mg/g; ptrend<0·0001).

INTERPRETATION

Empagliflozin slowed the rate of progression of chronic kidney disease among all types of participant in the EMPA-KIDNEY trial, including those with little albuminuria. Albuminuria alone should not be used to determine whether to treat with an SGLT2 inhibitor.

FUNDING

Boehringer Ingelheim and Eli Lilly.

Impact of primary kidney disease on the effects of empagliflozin in patients with chronic kidney disease: secondary analyses of the EMPA-KIDNEY trial

BACKGROUND

The EMPA-KIDNEY trial showed that empagliflozin reduced the risk of the primary composite outcome of kidney disease progression or cardiovascular death in patients with chronic kidney disease mainly through slowing progression. We aimed to assess how effects of empagliflozin might differ by primary kidney disease across its broad population.

METHODS

EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA). Patients were eligible if their estimated glomerular filtration rate (eGFR) was 20 to less than 45 mL/min per 1·73 m2, or 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher at screening. They were randomly assigned (1:1) to 10 mg oral empagliflozin once daily or matching placebo. Effects on kidney disease progression (defined as a sustained ≥40% eGFR decline from randomisation, end-stage kidney disease, a sustained eGFR below 10 mL/min per 1·73 m2, or death from kidney failure) were assessed using prespecified Cox models, and eGFR slope analyses used shared parameter models. Subgroup comparisons were performed by including relevant interaction terms in models. EMPA-KIDNEY is registered with ClinicalTrials.gov, NCT03594110.

FINDINGS

Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroupings by primary kidney disease included 2057 (31·1%) participants with diabetic kidney disease, 1669 (25·3%) with glomerular disease, 1445 (21·9%) with hypertensive or renovascular disease, and 1438 (21·8%) with other or unknown causes. Kidney disease progression occurred in 384 (11·6%) of 3304 patients in the empagliflozin group and 504 (15·2%) of 3305 patients in the placebo group (hazard ratio 0·71 [95% CI 0·62-0·81]), with no evidence that the relative effect size varied significantly by primary kidney disease (pheterogeneity=0·62). The between-group difference in chronic eGFR slopes (ie, from 2 months to final follow-up) was 1·37 mL/min per 1·73 m2 per year (95% CI 1·16-1·59), representing a 50% (42-58) reduction in the rate of chronic eGFR decline. This relative effect of empagliflozin on chronic eGFR slope was similar in analyses by different primary kidney diseases, including in explorations by type of glomerular disease and diabetes (p values for heterogeneity all >0·1).

INTERPRETATION

In a broad range of patients with chronic kidney disease at risk of progression, including a wide range of non-diabetic causes of chronic kidney disease, empagliflozin reduced risk of kidney disease progression. Relative effect sizes were broadly similar irrespective of the cause of primary kidney disease, suggesting that SGLT2 inhibitors should be part of a standard of care to minimise risk of kidney failure in chronic kidney disease.

FUNDING

Boehringer Ingelheim, Eli Lilly, and UK Medical Research Council.

Learning Curves in Establishing a New Minimally Invasive Pancreas Program

INTRODUCTION

Robotic pancreaticoduodenectomy (rPD) is a complex operation with a reported learning curve of 80 cases. Two recent graduates of a formal robotic complex general surgical oncology training program have been performing rPD at our institution since 2016, which had no previous institutional experience with rPD.

OBJECTIVE

To evaluate the learning curve associated with developing a new robotic pancreaticoduodenectomy (rPD) program by fellowship trained surgeons with institutional support.

METHODS

Sixty patients undergoing rPD from 2016 to 2022 were reviewed for and compared with proficiency benchmarks set by the University of Pittsburg experience.

RESULTS

By 30 cases, operative time met the proficiency benchmark of 391 minutes. Additionally, the entire cohort had comparable rates of clinically relevant postoperative pancreatic fistula (6.7% vs 3%, P = .6), 30-day mortality (0% vs 3%, P = .18), major complications (Clavien >2; 23% vs 17%, P = .14), and length of stay (6 vs 7 days, P = .49) when compared to the benchmark.

CONCLUSION

Perioperative outcomes were comparable to proficiency benchmarks from initiation of the new rPD program, and operative time reached proficiency benchmark by 30 cases. This data suggests that graduates of formal rPD training programs can safely establish new minimally invasive pancreas programs at sites with no previous institutional rPD experience.

PRESS survey: PREvention of surgical site infection-a global pan-specialty survey of practice protocol

Background

Surgical site infections (SSI) complicate up to 40% of surgical procedures, leading to increased patient morbidity and mortality. Previous research identified disparities in SSI prevention guidelines and clinical practices across different institutions. The study aims to identify variations in SSI prevention practices within and between specialties and financial systems and provide a representation of existing SSI preventative measures to help improve the standardization of SSI prevention practices.

Methods

This collaborative cross-sectional survey will be aimed at pan-surgical specialties internationally. The study has been designed and will be reported in line with the CROSS and CHERRIES standards. An international study steering committee will design and internally validate the survey in multiple consensus-based rounds. This will be based on SSI prevention measures outlined in the CDC (2017), WHO (2018), NICE (2019), Wounds UK (2020) and the International Surgical Wound Complications Advisory Panel (ISWCAP) guidelines. The questionnaire will include demographics, SSI surveillance, preoperative, peri-operative and postoperative SSI prevention. Data will be collected on participants' surgical specialty, operative grade, of practice and financial healthcare system of practice. The online survey will be designed and disseminated using QualtricsXM Platform™ through national and international surgical colleges and societies, in addition to social media and snowballing. Data collection will be open for 3 months with reminders, and raking will be used to ascertain the sample. Responses will be analyzed, and the chi-square test used to evaluate the impact of SSI prevention variables on responses.

Discussion

Current SSI prevention practice in UK Vascular surgery varies considerably, with little consensus on many measures. Given the inconsistency in guidelines on how to prevent SSIs, there is a need for standardization. This survey will investigate the disparity in SSI preventative measures between different surgical fields and countries.

Imaging manifestations of IgG4-related disease

IgG4-related disease is a multisystem immune-mediated disorder associated with lesions manifesting an IgG4-rich plasma cell infiltrate and often raised serum IgG4 concentrations. The disease can mimic neoplastic, infective, and inflammatory processes due to features such as development of masses or organ enlargement. Prompt consideration of this diagnosis is essential to avoid unnecessary investigations and offer appropriate treatments, which can include steroids and other immunosuppressive agents. Although histology is typically diagnostic, imaging is critical to assess disease burden, determine biopsy targets, and evaluate response to treatment. Characteristic imaging features can also point towards the diagnosis in the absence of biopsy. This review highlights these features, as well as more atypical findings, grouped by organ or system. Differential diagnoses are emphasised. The full spectrum of imaging methods is discussed. Whole-body imaging with integrated 2-[18F]-fluoro-2-deoxy-d-glucose (FDG) positron-emission tomography (PET)/computed tomography (CT) has an evolving role in the detection of multi-organ involvement and subsequent follow-up.

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.

Innovation in gastrointestinal surgery: the evolution of minimally invasive surgery-a narrative review

Background

Minimally invasive (MI) surgery has revolutionised surgery, becoming the standard of care in many countries around the globe. Observed benefits over traditional open surgery include reduced pain, shorter hospital stay, and decreased recovery time. Gastrointestinal surgery in particular was an early adaptor to both laparoscopic and robotic surgery. Within this review, we provide a comprehensive overview of the evolution of minimally invasive gastrointestinal surgery and a critical outlook on the evidence surrounding its effectiveness and safety.

Methods

A literature review was conducted to identify relevant articles for the topic of this review. The literature search was performed using Medical Subject Heading terms on PubMed. The methodology for evidence synthesis was in line with the four steps for narrative reviews outlined in current literature. The key words used were minimally invasive, robotic, laparoscopic colorectal, colon, rectal surgery.

Conclusion

The introduction of minimally surgery has revolutionised patient care. Despite the evidence supporting this technique in gastrointestinal surgery, several controversies remain. Here we discuss some of them; the lack of high level evidence regarding the oncological outcomes of TaTME and lack of supporting evidence for robotic colorectalrectal surgery and upper GI surgery. These controversies open pathways for future research opportunities with RCTs focusing on comparing robotic to laparoscopic with different primary outcomes including ergonomics and surgeon comfort.

Can educational video resources improve learning when used to augment traditional teaching of clinical examination? A randomized control trial of novice medical students

BACKGROUND

Good clinical examination skills can both increase the quality of patient care and reduce its cost. A previous study by our group demonstrated that face-to-face training is the gold standard for teaching these skills. It is unclear if high quality educational videos can augment this teaching.

METHODS

Forty-two Medical Students naïve to large joint examination were recruited and block randomised to two groups. The control group had face-to-face teaching alone. The intervention group had their teaching augmented with a custom educational video accessed via a web portal. Participants were assessed on their examination of a large joint using a previously standardised assessment tool at baseline and 7 days post intervention. Assessors were blinded to intervention type.

RESULTS

There was no significant difference in the mean baseline scores. Mean baseline scores were 3.35 (11.2%, SD = 2.2, SE = 0.49) for the face-to-face only group and 2.65 (8.8%, SD = 1.39, SE = 0.31) for the video adjunct group [p = 0.137]. There was a significant difference in the improvement in score after intervention between each group [p = 0.005]. The mean improvement in score was 15.42 (SD = 5.64, SE = 1.29) for the face-to-face only group and 20.68 (SD = 4.33,SE = 0.99) for the video adjunct group.

CONCLUSION

When used as an adjunct to more traditional face-to-face teaching methods, a custom-made educational video significantly improves the teaching of clinical examination skills and there is a role for these resources in augmenting traditional teaching methods.

The barriers and facilitators to research in practice: the experiences of a medicines optimisation team within a clinical commissioning group

Introduction

Research active healthcare organisations and staff have been shown to significantly improve performance and patient outcomes1. Undertaking research is a core element of the pharmacist role, however many pharmacists report not having the skills, knowledge and/or resources to take part2. There are many opportunities for the delivery of transformational research within primary care, however pharmacy team engagement is lacking.

Aim

To explore the barriers and facilitators to research engagement within a Clinical Commissioning Group (CCG) Medicines Optimisation team.

Methods

Twelve focus groups, guided by a semi-structured topic guide, were held over MS Teams between October 2021 and February 2022. 37 participants (pharmacists, pharmacy technicians and administrative support roles) attended and discussed topics relating to their experiences of engaging with research, as well as what helped or hindered them. Detailed notes were taken and analysed using Thematic Analysis. Following this inductive analysis, which aimed to capture all themes arising from the data, the Consolidated Framework for Implementation Research (CFIR)3 was applied. This helped to categorise the barriers and facilitators into domains which influence to what extent research is undertaken. The analysis was validated by the CCG team. This study was deemed to be service evaluation and therefore no ethical approval was needed.

Results

Three core themes emerged: People, Place and Practicalities. Individuals felt they had limited knowledge and capabilities in the field of research, despite having an internal motivation to engage in research activity. The perception of research was often linked in peoples’ thoughts to academia or secondary care/ acute Trusts or lab-based, and therefore not really something they would engage with in their current role. A lack of research culture, leadership and visibility of projects were all thought to hinder the team. A clear need for training and education in research (what it is, how it can be done, and available tools) was expressed, as well as appropriate resource allocation. Mapping to the CFIR illustrated that most barriers fell within the inner setting (i.e. the organisation itself) and with the process of conducting research, such as limited time, lack of encouragement from champions and poor feedback from projects. Enablers were also identified which included advice offered by external organisations, dissemination about work conducted in other primary care organisations and beliefs about the benefits of being research active.

Discussion/Conclusion

Participants perceived there to be many more barriers to research engagement than enablers, and these ranged from challenges with the individual projects, the process of conducting research within the organisation, things about the person themselves, their organisation or the wider setting of primary care. Areas for improvement were identified, mainly through increased training, visibility of projects and interested people, development of champions and role models, and stronger links with academia. This study was conducted with only one CCG and therefore further work needs to explore the experience within other integrated care boards and across secondary and community practice.

References

1. Hanney, S., Boaz, A., Soper, B. and Jones, T. Engagement in research: an innovative three-stage review of the benefits for health-care performance. Health Services and Delivery Research, 2013;1(8). ISSN (print) 2050-4349

2. Crilly P, Patel N, Ogunrinde A, Berko D, Kayyali R. Community Pharmacists’ Involvement in Research in the United Kingdom. Pharmacy. 2017;5(3):48. https://doi.org/10.3390/pharmacy5030048

3. Damschroder, L.J., Aron, D.C., Keith, R.E. et al. Fostering implementation of health services research findings into practice: a consolidated framework for advancing implementation science. Implementation Sci 2009;4:50. https://doi.org/10.1186/1748-5908-4-50

Clinical characteristics with inflammation profiling of long COVID and association with 1-year recovery following hospitalisation in the UK: a prospective observational study

BACKGROUND

No effective pharmacological or non-pharmacological interventions exist for patients with long COVID. We aimed to describe recovery 1 year after hospital discharge for COVID-19, identify factors associated with patient-perceived recovery, and identify potential therapeutic targets by describing the underlying inflammatory profiles of the previously described recovery clusters at 5 months after hospital discharge.

METHODS

The Post-hospitalisation COVID-19 study (PHOSP-COVID) is a prospective, longitudinal cohort study recruiting adults (aged ≥18 years) discharged from hospital with COVID-19 across the UK. Recovery was assessed using patient-reported outcome measures, physical performance, and organ function at 5 months and 1 year after hospital discharge, and stratified by both patient-perceived recovery and recovery cluster. Hierarchical logistic regression modelling was performed for patient-perceived recovery at 1 year. Cluster analysis was done using the clustering large applications k-medoids approach using clinical outcomes at 5 months. Inflammatory protein profiling was analysed from plasma at the 5-month visit. This study is registered on the ISRCTN Registry, ISRCTN10980107, and recruitment is ongoing.

FINDINGS

2320 participants discharged from hospital between March 7, 2020, and April 18, 2021, were assessed at 5 months after discharge and 807 (32·7%) participants completed both the 5-month and 1-year visits. 279 (35·6%) of these 807 patients were women and 505 (64·4%) were men, with a mean age of 58·7 (SD 12·5) years, and 224 (27·8%) had received invasive mechanical ventilation (WHO class 7-9). The proportion of patients reporting full recovery was unchanged between 5 months (501 [25·5%] of 1965) and 1 year (232 [28·9%] of 804). Factors associated with being less likely to report full recovery at 1 year were female sex (odds ratio 0·68 [95% CI 0·46-0·99]), obesity (0·50 [0·34-0·74]) and invasive mechanical ventilation (0·42 [0·23-0·76]). Cluster analysis (n=1636) corroborated the previously reported four clusters: very severe, severe, moderate with cognitive impairment, and mild, relating to the severity of physical health, mental health, and cognitive impairment at 5 months. We found increased inflammatory mediators of tissue damage and repair in both the very severe and the moderate with cognitive impairment clusters compared with the mild cluster, including IL-6 concentration, which was increased in both comparisons (n=626 participants). We found a substantial deficit in median EQ-5D-5L utility index from before COVID-19 (retrospective assessment; 0·88 [IQR 0·74-1·00]), at 5 months (0·74 [0·64-0·88]) to 1 year (0·75 [0·62-0·88]), with minimal improvements across all outcome measures at 1 year after discharge in the whole cohort and within each of the four clusters.

INTERPRETATION

The sequelae of a hospital admission with COVID-19 were substantial 1 year after discharge across a range of health domains, with the minority in our cohort feeling fully recovered. Patient-perceived health-related quality of life was reduced at 1 year compared with before hospital admission. Systematic inflammation and obesity are potential treatable traits that warrant further investigation in clinical trials.

FUNDING

UK Research and Innovation and National Institute for Health Research.

Duration of External Neck Stabilisation (DENS) following odontoid fracture in older or frail adults: protocol for a randomised controlled trial of collar versus no collar

INTRODUCTION

Fractures of the odontoid process frequently result from low impact falls in frail or older adults. These are increasing in incidence and importance as the population ages. In the UK, odontoid fractures in older adults are usually managed in hard collars to immobilise the fracture and promote bony healing. However, bony healing does not always occur in older adults, and bony healing is not associated with quality of life, functional, or pain outcomes. Further, hard collars can cause complications such as skin pressure ulcers, swallowing difficulties and difficulties with personal care. We hypothesise that management with no immobilisation may be superior to management in a hard collar for older or frail adults with odontoid fractures.

METHODS AND ANALYSES

This is the protocol for the Duration of External Neck Stabilisation (DENS) trial-a non-blinded randomised controlled trial comparing management in a hard collar with management without a collar for older (≥65 years) or frail (Rockwood Clinical Frailty Scale ≥5) adults with a new odontoid fracture. 887 neurologically intact participants with any odontoid process fracture type will be randomised to continuing with a hard collar (standard care) or removal of the collar (intervention). The primary outcome is quality of life measured using the EQ-5D-5L at 12 weeks. Secondary outcomes include pain scores, neck disability index, health and social care use and costs, and mortality.

ETHICS AND DISSEMINATION

Informed consent for participation will be sought from those able to provide it. We will also include those who lack capacity to ensure representativeness of frail and acutely unwell older adults. Results will be disseminated via scientific publication, lay summary, and visual abstract. The DENS trial received a favourable ethical opinion from the Scotland A Research Ethics Committee (21/SS/0036) and the Leeds West Research Ethics Committee (21/YH/0141).

TRIAL REGISTRATION NUMBER

NCT04895644.

Management of C2 odontoid peg fragility fractures - A UK survey of spinal surgeons

PURPOSE

Patients sustaining fragility fractures of the C2 odontoid peg have 30-day mortality rates as high as 10% rising up to 34.1% at 1 year. Substantial controversy exists regarding optimal management of these fractures and there is a lack of national guidance to inform best practice. The aim of this study was to determine current practice in the management of these fractures throughout the United Kingdom.

METHODS

A UK wide, cross sectional survey was conducted, asking 10 questions regarding the initial management, imaging and follow-up of an elderly patient with a type 2 fragility odontoid peg fracture. This was publicised through the British Orthopaedic Association website and sent to all members of the Society of British Neurological Surgeons (SBNS) via email.

RESULTS

107 Responses were received. 56% from orthopaedic consultants, 29% from neurosurgical consultants and 15% from senior spine fellows. 86% (92) of respondents choose treatment with a cervical orthosis, with 84% (77) of these opting for a semi rigid Aspen or Philadelphia collar compared to 16% (15) opting for a soft cervical collar. Three (3%) opted for operative intervention with a further three (3%) choosing Halo fixation. Nine respondents (8%) opted for no orthosis and treatment with analgesia alone. Length of immobilisation in cervical orthosis ranged from 6 to 12 weeks. Initial follow-up ranged from 1 week to 6 weeks, with 6% (6) discharged without follow up. There was also marked variation in the use of follow-up imaging with 17% (18) using plain radiographs, 62% (66) requesting lateral flexion / extension radiographs, 10% (11) using CT and 11% (12) not performing any imaging at final follow up. In 60% (64) of cases respondents did not change subsequent management as a result of imaging.

CONCLUSION

Type-2 fragility peg fractures have high morbidity and mortality. There is marked variation in the treatment modalities used, follow-up regime and use of imaging throughout the UK. Given the rapidly increasing incidence of these injuries and the associated mortality this should be a high priority field for further research. Further large scale studies are urgently required to inform best practice and standardise management of these injuries.

Chronic kidney disease mediates cardiac dysfunction associated with increased resident cardiac macrophages

BACKGROUND

The leading cause of death in end-stage kidney disease is related to cardiovascular disease. Macrophages are known to be involved in both chronic kidney disease (CKD) and heart failure, however their role in the development of cardiorenal syndrome is less clear. We thus sought to investigate the role of macrophages in uremic cardiac disease.

METHODS

We assessed cardiac response in two experimental models of CKD and tested macrophage and chemokine implication in monocytopenic CCR2-/- and anti-CXCL10 treated mice. We quantified CXCL10 in human CKD plasma and tested the response of human iPSC-derived cardiomyocytes and primary cardiac fibroblasts to serum from CKD donors.

RESULTS

We found that reduced kidney function resulted in the expansion of cardiac macrophages, in particular through local proliferation of resident populations. Influx of circulating monocytes contributed to this increase. We identified CXCL10 as a crucial factor for cardiac macrophage expansion in uremic disease. In humans, we found increased plasma CXCL10 concentrations in advanced CKD, and identified the production of CXCL10 in cardiomyocytes and cardiac fibroblasts.

CONCLUSIONS

This study provides new insight into the role of the innate immune system in uremic cardiomyopathy.

SP4.1.1 The impact of the SARS-CoV-2 (COVID-19) crisis on surgical training: a global survey and a proposed framework for recovery

Background

The SARS-Cov-2 pandemic had a profound impact on surgical services, potentially causing a detrimental impact on training opportunities. The aim of this global survey was to assess the impact of the COVID-19 crisis on surgical training and develop a framework for recovery.

Methods

A cross-sectional, web-based survey was conducted. This was designed by a steering committee of medical educationalists and validated by a group of trainees prior to dissemination.

Results

608 responses were obtained from 34 countries and 15 specialties. The results demonstrated major disruptions in all aspects of training. The impact was highest for conferences (525/608) and hands-on courses (517/608), but less for in-patient care related training (268/608). European trainees were significantly more likely to experience direct training disruption than trainees in Asia (O.R 0.148, 95% C.I -2.443, -1.378) or Australia (O.R 0.097, -2.981, -1.678) (c²⁼ 87.162 p < 0.001). Alternative training resources (webinars: 359/608, educational videos: 234/608) have emerged, although trainees expressed some dissatisfaction with them.

The collective responses generated a five-pillar framework for training recovery: that involved; prioritisation of trainee and public safety; guidance from training stakeholders with the involvement of trainees; prioritisation of training especially the roles of senior surgeons/trainers; provision of access to alternative/new teaching methods and measures to address trainee anxiety.

Conclusions

Training has been greatly affected. The introduction of new teaching methods and focus on training after the pandemic are imperative.

Impact of the SARS-CoV-2 (COVID-19) crisis on surgical training: global survey and a proposed framework for recovery

Background

The SARS-CoV-2 pandemic had a profound impact on surgical services, potentially having a detrimental impact on training opportunities. The aim of this global survey was to assess the impact of the COVID-19 crisis on surgical training and to develop a framework for recovery.

Methods

A cross-sectional, web-based survey was conducted. This was designed by a steering committee of medical educationalists and validated by a group of trainees before dissemination.

Results

A total of 608 responses were obtained from 34 countries and 15 specialties. The results demonstrated major disruption in all aspects of training. The impact was greatest for conferences (525 of 608) and hands-on courses (517 of 608), but less for inpatient care-related training (268 of 608). European trainees were significantly more likely to experience direct training disruption than trainees in Asia (odds ratio 0.15) or Australia (OR 0.10) (χ² = 87.162, P < 0.001). Alternative training resources (webinars, 359 of 608; educational videos, 234 of 608) have emerged, although trainees expressed some dissatisfaction with them. The collective responses generated a four-pillar framework for training recovery that involved: guidance from training stakeholders with the involvement of trainees; prioritization of training, especially the roles of senior surgeons/trainers; provision of access to alternative/new teaching methods; and measures to address trainee anxiety.

Conclusion

Training has been greatly affected by the COVID-19 pandemic. The introduction of new teaching methods and a focus on training after the pandemic are imperative.

New Treatment Options for Pituitary Granulomatosis With Polyangiitis

Background: Granulomatosis with polyangiitis (GPA) rarely involves the pituitary gland and has been reported in 1% of all cases of GPA. Most frequently, it presents with pituitary mass effect and diabetes insipidus (DI). To date, there are no treatment guidelines for this rare condition. Case Presentation: Case 1: A 55 year old female with a history of ANCA-positive pulmonary GPA, previously treated with glucocorticoids and immunosuppressants, presented two years later with cranial DI and bitemporal hemianopia. MRI showed a large sellar mass with suprasellar extension. High dose glucocorticoids resulted in good clinical and radiological response. Further treatment consisted in a combination of Cyclophosphamide and Rituximab (RTX). Further doses of RTX are planned aiming for a period of B-cell depletion. Case 2: A 38 year old female, presented with polyuria, recurrent nosebleeds, headaches and a left visual field defect. Pituitary profile revealed ACTH deficiency and MRI showed a heterogenous cystic lesion with peripheral enhancement and stalk thickening. Steroid replacement led to immediate improvement in her symptoms. Cranial DI was confirmed and raised Proteinase 3 (PR3) antibody suggested GPA. A combination of prednisolone and Methotrexate led to significant improvement of MRI appearances and declining PR3 antibody levels. For remission maintenance, two cycles of RTX were given with further radiological and biochemical improvement, and, following dynamic assessment of her HPA axis, she could be fully weaned off steroids. Case 3 is a 47 year old female with a history of childhood asthma. She was found to have cavitating lung lesions. ANCA positivity confirmed GPA and she was commenced on high-dose steroids. During follow-up, she developed headache, polyuria and polydipsia. MRI pituitary showed a suprasellar lesion and pituitary biopsy revealed inflammatory hypophysitis. Cranial DI was confirmed by water deprivation testing. Previous allergic reactions to both RTX and Ofatumumab precluded anti-CD40 monoclonal antibodies and she was commenced on Azathioprine. A further recurrence of pituitary GPA necessitated escalation of the steroid dose and switch of azathioprine to mycophenolate mofetil. She remains in remission and her steroids reduced to a maintenance dose. Conclusion: GPA pituitary has been observed to occur at variable time after diagnosis often in the absence of any other systemic features. A combination of glucocorticoids and RTX has been approved for severe relapsing pulmonary GPA, however, limited data is available for pituitary GPA. In this case series, the response to high dose steroids and RTX for remission maintenance has been encouraging. Experience with ‘conventional’ immunosuppresants remains limited and therapeutic responses remain variable. Further clinical studies are required to establish effective treatment for pituitary GPA.

Development and Validation of a Virtual Reality Haptic Femoral Nailing Simulator

OBJECTIVE

To create a virtual reality (VR) femoral nailing simulator combining haptics and image intensifier functionality and then carry out validation studies to assess its educational value.

DESIGN

The simulator consisted of a 3D virtual environment, a haptic device and 3D printed drill handle and a VR headset. The environment was created using a video game development engine, interfaced with plugins to allow haptic feedback and image intensifier functionality. Two tasks were created within the simulator as part of an antegrade femoral intramedullary (IM) nail procedure: proximal guidewire entry and distal locking.For the validation study, participants performed the above tasks on the simulator. Metrics were collected including time taken, number of X-rays and tool distance travelled and used to assess construct validity. A questionnaire was then completed to assess authenticity and content validity.

SETTING

Simulator development in centre for simulation and engagement science laboratory. Validation study in a teaching hospital environment.

PARTICIPANTS

Orthopedic specialist trainees and consultants.

RESULTS

Surgeon experience (number of IM nails performed/postgraduate year) correlated with significantly improved task performance. More experienced surgeons took less time, used fewer X-rays and had greater economy of movement than less experienced surgeons. Authenticity and content validity were well rated, with criticisms primarily due to hardware limitations.

CONCLUSIONS

To our knowledge this is the first orthopedic simulator to combine immersive VR with haptics and full image intensifier functionality. By combining multiple aspects of surgical practice within a single device, we aimed to improve participant immersion and educational value. Our work so far has focused on technical skills, demonstrating good authenticity, content and construct validity, however our findings show promise in other applications such as nontechnical skill development and assessment.

Identifying behaviour change techniques to support medicines management for older people at care transitions

Introduction

Older patients are at significant risk of medicines-related harm following a hospital to home transition [1]. Strategies, such as information transfer and medicines reconciliation, have been suggested to promote successful transitions through better medicines management [2]. These interventions, however, are not often underpinned by patient experience or grounded in theory, and therefore have variable effects in real-world contexts.

Aim

To identify which behaviour change techniques (BCTs) could be combined within a complex intervention to support post-discharge medicines management.

Methods

Barriers and facilitators to post-discharge medicines management behaviours were identified from an analysis of interviews with twenty-seven older people (aged 75 years plus) and mapped to the Theoretical Domains Framework (TDF). These participants were recruited during a stay in two large hospitals in the North of England. All potential BCTs targeting the identified TDF domains were found using validated mapping exercises and refined by panel consensus. The panel consisted of two pharmacists, two health services researchers, a social work academic and a patient representative. Next, a convenience sample of key stakeholders (n=40; patients and family carers, healthcare professionals and researchers) were invited to take part in an online survey to prioritise remaining techniques. A total score for each BCT was calculated based on its potential i) effectiveness, ii) acceptability and iii) ability to cause unintended consequences. The BCTs were ranked from lowest to highest scores. As validation, the final selection of BCTs was assessed using the APEASE criteria and mapped back to the behavioural determinants to check the components would enhance facilitators and overcome barriers (Figure 1).

Results

Forty-six behavioural determinants were identified within interviews and classified as barriers (n=19), facilitators (n=10), or both (n=17). These were deductively mapped onto 11 domains of the TDF. Following the mapping, 50 discrete BCTs were identified, which were reduced to 35 after subsequent consensus discussions between panel members to remove any deemed inappropriate. The survey resulted in 25 responses (62.5% response rate). Following visual inspection of the ranking, a natural cut-off was identified by panel consensus at 88% of the total score. This, and further assessment using the APEASE criteria, prioritised eight BCTs that were highly rated to be effective in promoting post-discharge medicines management when combined within a complex intervention. These were: practical social support, goal/ target specified, prompts, triggers or cues, social processes of encouragement, motivational interviewing, rehearsal, review goals, and comparative imagining of future outcomes.

Conclusion

This study has identified eight BCTs that could be valuable when combined within a complex intervention to support post-discharge medicines management for older people. Consensus allowed prioritisation of BCTs that were likely to be effective, acceptable to older people, practical and cost-effective to deliver within current healthcare organisations. Limitations included challenges of coding complex behavioural determinants to the TDF, defining the BCTs within the medicines management context and modest survey sample size. To overcome these limitations, input was sought from a health psychologist with expertise and consensus involved all relevant stakeholders.

References

1. Parekh, N., Ali, K., Stevenson, J. M., et al. Incidence and cost of medication harm in older adults following hospital discharge: a multicentre prospective study in the UK. British journal of clinical pharmacology 2018;84(8):1789–1797.

2. Tomlinson, J., Cheong, V., Fylan, B., et al. Successful care transitions for older people: a systematic review and meta-analysis of the effects of interventions that support medication continuity. Age and Ageing 2020;00:1–12.

The mixed reality medical ward round with the MS HoloLens 2: Innovation in reducing COVID-19 transmission and PPE usage

Background

The COVID-19 pandemic necessitated changes to the traditional medical ward round to protect staff and patients. This study investigated the value and acceptability of using the Microsoft HoloLens 2 mixed reality headset in a COVID-19 renal medicine ward.

Methods

The HoloLens 2 was used during the height of the COVID-19 pandemic and it was compared with the days prior to its introduction. Staff exposure to COVID-19 and PPE usage were measured, and staff and patients were surveyed on the HoloLens 2 experience.

Results

The average ward round was significantly shorter with the use of the HoloLens 2 (94 minutes vs 137 minutes; p=0.006). With the HoloLens 2, only the consultant was in direct contact with COVID-19 patients compared with up to seven staff members on a normal ward round. Personal protective equipment usage was reduced by over 50%. Both staff and patients were positive about its use but raised some important concerns.

Conclusion

The HoloLens 2 mixed reality technology is an innovative solution to the challenges posed by COVID-19 to the traditional medical ward round.

22 Coping with Medicines After Hospital Discharge; the Invisible Work of Older Patients and Their Care-Givers

Introduction

Older patients often experience medication-related problems following discharge from hospital. These can be categorised as issues with obtaining medication, taking medication, medication effects or problems with communication or care co-ordination (Nicosia et al., Journal of General Internal Medicine, 2019, https://doi.org/10.1007/s11606-019-05463-z). The aim of this study was to explore older adults’ experiences of post-discharge medicines management, including the strategies they use to safely manage their changed medicines.

Methods

Following ethical approval, patients aged 75 and above, with a change in their long term medicines, were recruited during admission to one of two hospitals in Yorkshire. Semi-structured interviews took place with the participants in their own homes, approximately two weeks after discharge. Interviews were audio recorded and transcribed. Data were analysed using the Framework method.

Results

Twenty-seven patients (mean age 85 years; 6 males) consented to be interviewed. They described multiple self-management and safety strategies used to support medicines management in the early post-discharge phase. The work done included adaptations (to routines, the home environment and action plans), scaffolding (where patients and their care-givers support the primary care system by providing additional documentation or prompts to ensure medicines were supplied on time and were correct) and error avoidance (seeking information, performing checks and balances).

Conclusion

Older patients experience gaps in their post-discharge medicines-related care which they had to bridge through implementing their own strategies or by enlisting support from others. This study shines a spotlight on to the invisible work that patients have to do in order to make post-discharge medicines management fit for purpose. Further work should consider those patients who are not able to carry out these tasks or who do not have any care-givers available for support and how this potential gap in care can be addressed.

Incorporating SPACES recommendations to the COVID-19 ward care approach at the Royal Bournemouth Hospital

The British Thoracic Society have published SPACES (Sharing Patient Assessments Cuts Exposure for Staff) guidance recommending the use of telecommunications as a means of inpatient clinical assessment during the COVID-19 pandemic. The aim of this audit was to reduce face-to-face exposure time during inpatient care of patients with suspected/confirmed COVID-19 using a telecommunications-based approach. 76 patients were included in the audit. 46 patients were included in cycle 1, which measured the average face-to-face time for clinical consultation per patient. 30 patients were included in cycle 2, whereby history-taking was conductedusing telecommunications and, if required, face-to-face physical examination.Average face-to-face exposure time was reduced to a median of 0 seconds (IQR 0-146.3 seconds) in the telecommunications group, from a median of 312.5 seconds (IQR 178.8-442.3 seconds) in the comparator group (p<0.0001). Patient satisfaction was high with individuals' responses revealing a perception of improved safety by maintaining social distancing. No adverse events were noted.The audit confirms telecommunications can be integrated successfully into the daily inpatient ward round structure, reducing face-to-face exposure time while maintaining patient satisfaction and safety.

A Case Series of Patients with Isolated IgG4-related Hypophysitis Treated with Rituximab

Context

The acute presentation of immunoglobulin G4 (IgG4)-related hypophysitis can be indistinguishable from other forms of acute hypophysitis, and histology remains the diagnostic gold standard. The high recurrence rate necessitates long-term immunosuppressive therapy. Rituximab (RTX) has been shown to be effective in systemic IgG4-related disease (IgG4-RD), but experience with isolated pituitary involvement remains limited.

Case Description

We report 3 female patients with MRI findings suggestive of hypophysitis. All patients underwent transsphenoidal biopsy and fulfilled diagnostic criteria for IgG4-related hypophysitis. Treatment with glucocorticoids (GCs) resulted in good therapeutic response in Patients 1 and 2, but the disease recurred on tapering doses of GCs. GC treatment led to emotional lability in Patient 3, necessitating a dose reduction. All 3 patients received RTX and Patients 2 and 3 received further courses of treatment when symptoms returned and B-cells repopulated. Patient 3 did not receive RTX until 12 months from the onset of symptoms. Patient 1 was not able to have further RTX treatments due to an allergic reaction when receiving the second dose. Rituximab treatment resulted in sustained remission and full recovery of anterior pituitary function in Patients 1 and 2, with complete resolution of pituitary enlargement. By contrast, Patient 3 only showed a symptomatic response following RTX treatment, but pituitary enlargement and hypofunction persisted.

Conclusion

Rituximab treatment for IgG4-related hypophysitis resulted in sustained remission in 2 patients treated early in the disease process but only achieved partial response in a patient with chronic disease, suggesting that early therapeutic intervention may be crucial in order to avoid irreversible changes.

Minimally Invasive Repair of Sacroiliac Luxation

Sacroiliac fracture-luxation is a common injury that is associated with ilial and acetabular fractures of the opposite hemipelvis. Sacroiliac fracture-luxation results in an unstable pelvis and potentially collapse of the pelvic canal. A minimally invasive approach to the reduction and insertion of a screw for fixation of sacroiliac fracture-luxation using fluoroscopic guidance is viable. The advantages of using this technique are that a small incision is made with minimal soft tissue disruption and the surgical time is short. Recent publications have documented that this technique provided superior repair of sacroiliac fracture-luxations.

Evidence for a protective role for the rs805305 single nucleotide polymorphism of dimethylarginine dimethylaminohydrolase 2 (DDAH2) in septic shock through the regulation of DDAH activity

BACKGROUND

Dimethylarginine dimethylaminohydrolase 2 (DDAH2) regulates the synthesis of nitric oxide (NO) through the metabolism of the endogenous inhibitor of nitric oxide synthase, asymmetric dimethylarginine (ADMA). Pilot studies have associated the rs805305 SNP of DDAH2 with ADMA concentrations in sepsis. This study explored the impact of the rs805305 polymorphism on DDAH activity and outcome in septic shock.

METHODS

We undertook a secondary analysis of data and samples collected during the Vasopressin versus noradrenaline as initial therapy in septic shock (VANISH) trial. Plasma and DNA samples isolated from 286 patients recruited into the VANISH trial were analysed. Concentrations of L-Arginine and the methylarginines ADMA and symmetric dimethylarginine (SDMA) were determined from plasma samples. Whole blood and buffy-coat samples were genotyped for polymorphisms of DDAH2. Clinical data collected during the study were used to explore the relationship between circulating methylarginines, genotype and outcome.

RESULTS

Peak ADMA concentration over the study period was associated with a hazard ratio for death at 28 days of 3.3 (95% CI 2.0-5.4), p < 0.001. Reduced DDAH activity measured by an elevated ADMA:SDMA ratio was associated with a reduced risk of death in septic shock (p = 0.03). The rs805305 polymorphism of DDAH2 was associated with reduced DDAH activity (p = 0.004) and 28-day mortality (p = 0.02). Mean SOFA score and shock duration were also reduced in the less common G:G genotype compared to heterozygotes and C:C genotype patients (p = 0.04 and p = 0.02, respectively).

CONCLUSIONS

Plasma ADMA is a biomarker of outcome in septic shock, and reduced DDAH activity is associated with a protective effect. The polymorphism rs805305 SNP is associated with reduced mortality, which is potentially mediated by reduced DDAH2 activity.

TRIAL REGISTRATION

ISRCTN Registry, ISRCTN20769191 . Registered on 20 September 2012.

Motion-corrected multiparametric renal arterial spin labelling at 3 T: reproducibility and effect of vasodilator challenge

OBJECTIVES

We investigated the feasibility and reproducibility of free-breathing motion-corrected multiple inversion time (multi-TI) pulsed renal arterial spin labelling (PASL), with general kinetic model parametric mapping, to simultaneously quantify renal perfusion (RBF), bolus arrival time (BAT) and tissue T₁.

METHODS

In a study approved by the Health Research Authority, 12 healthy volunteers (mean age, 27.6 ± 18.5 years; 5 male) gave informed consent for renal imaging at 3 T using multi-TI ASL and conventional single-TI ASL. Glyceryl trinitrate (GTN) was used as a vasodilator challenge in six subjects. Flow-sensitive alternating inversion recovery (FAIR) preparation was used with background suppression and 3D-GRASE (gradient and spin echo) read-out, and images were motion-corrected. Parametric maps of RBF, BAT and T₁ were derived for both kidneys. Agreement was assessed using Pearson correlation and Bland-Altman plots.

RESULTS

Inter-study correlation of whole-kidney RBF was good for both single-TI (r² = 0.90), and multi-TI ASL (r² = 0.92). Single-TI ASL gave a higher estimate of whole-kidney RBF compared to multi-TI ASL (mean bias, 29.3 ml/min/100 g; p <0.001). Using multi-TI ASL, the median T₁ of renal cortex was shorter than that of medulla (799.6 ms vs 807.1 ms, p = 0.01), and mean whole-kidney BAT was 269.7 ± 56.5 ms. GTN had an effect on systolic blood pressure (p < 0.05) but the change in RBF was not significant.

CONCLUSIONS

Free-breathing multi-TI renal ASL is feasible and reproducible at 3 T, providing simultaneous measurement of renal perfusion, haemodynamic parameters and tissue characteristics at baseline and during pharmacological challenge.

KEY POINTS

• Multiple inversion time arterial spin labelling (ASL) of the kidneys is feasible and reproducible at 3 T. • This approach allows simultaneous mapping of renal perfusion, bolus arrival time and tissue T ₁ during free breathing. • This technique enables repeated measures of renal haemodynamic characteristics during pharmacological challenge.

Regulation of fluid reabsorption in rat or mouse proximal renal tubules by asymmetric dimethylarginine and dimethylarginine dimethylaminohydrolase 1

Nitric oxide prevents hypertension yet enhances proximal tubule Na⁺ reabsorption. Nitric oxide synthase is inhibited by asymmetric dimethylarginine (ADMA) that is metabolized by dimethylarginine dimethylaminohydrolase (DDAH) whose type 1 isoform is expressed abundantly in the proximal tubule (PT). We hypothesize that ADMA metabolized by DDAH-1 inhibits fluid reabsorbtion (Jv) by the proximal tubule. S2 segments of the PT were microperfused between blocks in vivo to assess Jv in anesthetized rats. Compared with vehicle, microperfusion of ADMA or N^ω-nitro-l-arginine methyl ester (l-NAME) in the proximal tubule reduced Jv dose dependently. At 10^-4 mol/l both reduced Jv by ~40% (vehicle: 3.2 ± 0.7 vs. ADMA: 2.1 ± 0.5, P < 0.01 vs. l-NAME: 1.9 ± 0.4 nl·min^-1·mm^-1, P < 0.01; n = 10). Selective inhibition of DDAH-1 in rats with intravenous L-257 (60 mg/kg) given 2 h before and L-257 (10^-5 mol/l) perfused in the proximal tubule for 5 min reduced Jv by 32 ± 4% (vehicle: 3.2 ± 0.5 vs. L-257: 2.2 ± 0.5 nl·min^-1·mm^-1; P < 0.01) and increased plasma ADMA by ≈50% (vehicle: 0.46 ± 0.03 vs. L-257: 0.67 ± 0.03 µmol/l, P < 0.0001) without changing plasma symmetric dimethylarginine. Compared with nontargeted control small-interference RNA, knock down of DDAH-1 in mice by 60% with targeted small-interference RNAs (siRNA) reduced Jv by 29 ± 5% (nontargeted siRNA: 2.8 ± 0.20 vs. DDAH-1 knockdown: 1.9 ± 0.31 nl·min^-1·mm^-1, P < 0.05). In conclusion, fluid reabsorption in the proximal tubule is reduced by tubular ADMA or by blocking its metabolism by DDAH-1. L-257 is a novel regulator of proximal tubule fluid reabsorption.

NRF2 prevents hypertension, increased ADMA, microvascular oxidative stress, and dysfunction in mice with two weeks of ANG II infusion

Nuclear factor erythyroid factor 2 (Nrf2) transcribes genes in cultured endothelial cells that reduce reactive oxygen species (ROS) and generate nitric oxide (NO) or metabolize asymmetric dimethylarginine (ADMA), which inhibits NO synthase (NOS). Therefore, we undertook a functional study to test the hypothesis that activation of Nrf2 by tert-butylhydroquinone (tBHQ) preserves microvascular endothelial function during oxidative stress. Wild-type CB57BL/6 (wt), Nrf2 wt (+/+), or knockout (-/-) mice received vehicle (Veh) or tBHQ (0.1%; activator of Nrf2) during 14-day infusions of ANG II (to induce oxidative stress) or sham. MAP was recorded by telemetry. Mesenteric resistance arterioles were studied on isometric myographs and vascular NO and ROS by fluorescence microscopy. ANG II increased the mean arterial pressure (112 ± 5 vs. 145 ± 5 mmHg; P < 0.01) and excretion of 8-isoprostane F_2α (2.8 ± 0.3 vs. 3.8 ± 0.3 ng/mg creatinine; P < 0.05) at 12-14 days. However, 12 days of ANG II reduced endothelium-derived relaxation (27 ± 5 vs. 17 ± 3%; P < 0.01) and NO (0.38 ± 0.07 vs. 0.18 ± 0.03 units; P < 0.01) but increased microvascular remodeling, endothelium-derived contractions (7.5 ± 0.5 vs. 13.0 ± 1.7%; P < 0.01), superoxide (0.09 ± 0.03 vs. 0.29 ± 0.08 units; P < 0.05), and contractions to U-46,619 (87 ± 6 vs. 118 ± 3%; P < 0.05), and endothelin-1(89 ± 4 vs. 123 ± 12%; P < 0.05). tBHQ prevented all of these effects of ANG II at 12-14 days in Nrf2^+/+ mice but not in Nrf2^-/- mice. In conclusion, tBHQ activates Nrf2 to prevent microvascular endothelial dysfunction, remodeling, and contractility, and moderate ADMA and hypertension at 12-14 days of ANG II infusion, thereby preserving endothelial function and preventing hypertension.

New ways of working; delivering better care for people with long-term conditions

Background

The cost-effectiveness of the traditional outpatient model for specialist care provision is increasingly being questioned in view of the changing patient needs, workforce challenges and technological advances.

Setting

This report summarises two RCGP London events showcasing new ways of delivering care for long-term conditions.

Questions

What are the alternative approaches to the traditional outpatient model and do they have common themes? What are the challenges and opportunities of these new models of care?

Methods

Presentation of examples of new ways of long-term condition care delivery and round-table facilitative discussion and reflection on the challenges and solutions around service re-design and implementation, the commissioning and funding of new models of care, the facilitation of system-wide learning and the collection of data for evaluation.

Results

Different ways of delivering care for people with Chronic Kidney Disease (CKD) and Chronic Obstructive Pulmonary Disease (COPD) were presented. Most of the interventions included virtual clinics (during which patient care was reviewed by a specialist remotely without the need for a face-to-face consultation), improved communication between primary and secondary care clinicians, an element of referral triage/prioritisation, the use of trigger tools to identify people at risk of deterioration, patient education and a multi-disciplinary approach.

Discussion-conclusions

Different models to the traditional outpatient long-term condition care are feasible and can result in improvements in the quality of care and staff satisfaction. However, such initiatives require careful planning, close collaboration between health care professionals and allocation of appropriate resources and training within primary care. There is also a need for systematic evaluation of such pilots to assess their cost-effectiveness and their acceptability to clinicians and patients. This requires systematic collection of population level data, agreement on the key outcomes for evaluation and a commitment of all stakeholders to sharing learning and resources to enable continuous improvement.

Abstract P344: Nuclear Factor E2-related Factor 2 (nrf2) Causes Early Microvascular Endothelial Dysfunction and Increased Adma by Activation of the Cox2/tp Receptor Pathway in Mice Infused With Angiotensin II for Three Days

Background: Activation of Nrf2 by tert-buthylhydroquinone (tBHQ) prevents hypertension, oxidative stress, endothelial dysfunction and ADMA in mice infused with angiotensin II (Ang II) for 12 days. However, Nrf2 activation with bardoxolone methyl increased cardiovascular events in diabetic patients within one week. Since we found that tBHQ activated cyclooxygenase (COX)-2 within 3 days, we tested the hypothesis that short-term tBHQ administration to Ang II infused mice increases microvascular dysfunction via COX dependent of PGs and TxA 2 that activate thromboxane-prostanoid receptors (TP-Rs).

Methods: Mesenteric resistance arterioles(MRAs)were isolated from mice infused for 3 days with ANG II (400 ng/kg/min) or vehicle and given oral tBHQ (0.1% of water) or vehicle (n=6 mice/group). Endothelial derived relaxation factor (EDRF) was assessed by a myograph and NO and ROS by RatioMaster TM .

Results: Compared to vehicle, Ang II infused mice given tBHQ had increased (P<0.05) conscious mean arterial pressure (135±6 vs 115±7 mmHg), urinary 8-Iso prostane (1.5±0.4 vs 1.1±0.2ng/mg creatinine), and decreased EDRF (17± 3 vs 23± 2%) and NO (0.23 ± 0.02 vs 0.35 ± 0.02 Δunits), and enhanced ( P<0.05, ) cellular ROS (0.27 ± 0.02 vs 0.12 ± 0.03 Δunits), mitochondria ROS (0.24 ± 0.02 vs 0.1 ± 0.02 Δunit) and microvascular asymmetric dimethylarginine (ADMA, 77 ± 6 vs 55 ± 7 nmol/mg protein). All these effects of tBHQ were prevented in COX-1 knockout mice drinking parecoxib (COX-2 inhibitor) and in TPR and Nrf2 knockout mice.

Conclusions: Activation of Nrf2 increases short term Ang II-induced increases in BP, oxidative stress, ADMA and endothelial dysfunction. These depend on signaling via COX 1 + 2 and TP receptors. Our studies reveal novel dual effects of Nrf2 in Ang II infused mice: increased BP, ROS, ADMA and endothelial dysfunction within 3 days secondary to activation of COX/TPR signaling follow by the opposite effects of Nrf2 on BP, ADMA and vascular function within 12 days. Therefore, blockade of COX-2/TPRs pathway during initiation of Nrf2 therapy may prevent the devastating early adverse effects that have prevented its use in hypertension or diabetes.

"Take-home" box trainers are an effective alternative to virtual reality simulators

BACKGROUND

Practice on virtual reality simulators (VRSs) has been shown to improve surgical performance. However, VRSs are expensive and usually housed in surgical skills centers that may be inaccessible at times convenient for surgical trainees to practice. Conversely, box trainers (BT) are inexpensive and can be used anywhere at anytime. This study assesses "take-home" BTs as an alternative to VRS.

METHODS

After baseline assessments (two simulated laparoscopic cholecystectomies, one on a VRS and one on a BT), 25 surgical trainees were randomized to two groups. Trainees were asked to practice three basic laparoscopic tasks for 6 wk (BT group using a "take-home" box trainer; VR group using VRS in clinical skills centers). After the practice period, all performed two laparoscopic cholecystectomy, one on a VRS and one on a BT; (i.e., posttraining assessment). VRS provided metrics (total time [TT], number of movements instrument tip path length), and expert video assessment of cholecystectomy in a BT (Global Operative Assessment of Laparoscopic Skills [GOALS] score) were recorded. Performance during pretraining and posttraining assessment was compared.

RESULTS

The BT group showed a significant improvement for all VRS metrics (P = 0.008) and the efficiency category of GOALS score (P = 0.03). Only TT improved in the VRS group, and none of the GOALS categories demonstrated a statistically significant improvement after training. Finally, the improvement in VRS metrics in the BT group was significantly greater than in the VR group (TT P = 0.005, number of movements P = 0.042, path length P = 0.031), although there were no differences in the GOALS scores between the groups.

CONCLUSIONS

This study suggests that a basic "take-home" BT is a suitable alternative to VRS.

Perceptions About the Present and Future of Surgical Simulation: A National Study of Mixed Qualitative and Quantitative Methodology

OBJECTIVES

Assess expert opinion on the current and future role of simulation in surgical education.

DESIGN

Expert opinion was sought through an externally validated questionnaire that was disseminated electronically.

PARTICIPANTS

Heads of Schools of Surgery (HoS) (and deputies) and Training Program Directors (TPD) (and deputies).

RESULTS

Simulation was considered a good training tool (HoS: 15/15, TPD: 21/21). The concept that simulation is useful mostly to novices and for basic skills acquisition was rejected (HoS: 15/15, TPDs: 21/21; HoS: 13/15, TPDs: 18/21). Further, simulation is considered suitable for teaching nontechnical skills (HoS: 13/15, TPDs: 20/21) and re-enacting stressful situations (HoS: 14/15, TPDs: 15/21). Most respondents also felt that education centers should be formally accredited (HoS: 12/15, TPDs: 16/21) and that consultant mentors should be appointed by every trust (HoS: 12/15, TPDs: 19/21). In contrast, there were mixed views on its use for trainee assessment (HoS: 6/15, TPDs: 14/21) and whether it should be compulsory (HoS: 8/15, TPDs: 11/21).

CONCLUSION

The use of simulation for the acquirement of both technical and nontechnical skills is strongly supported while views on other applications (e.g., assessment) are conflicting. Further, the need for center accreditation and supervised, consultant-led teaching is highlighted.

Managing Developmental Dysplasia of the Hip

Developmental dysplasia of the hip (DDH) involves a spectrum of hip disorders that affect hip anatomy and development and can range from mild anatomical deformity with a reduced but subluxatable hip to a frankly dislocated hip. It was previously known as congenital dislocation of the hip (CDH) but this name is no longer used due to the fact that the hip may be anatomically abnormal whilst not being dislocated. The key aim of clinical management of DDH is early diagnosis and referral as this can often mean less invasive treatment is possible, and outcomes are significantly improved if treatment is initiated at an early stage and certainly before 6 wk of age.

Abstract P623: Endothelial Dysfunction and Abnormal Perivascular Adipose Tissue Signaling in Subcutaneous Vessels from HIV-infected individuals

Objective: Perivascular adipose tissue (PVAT) normally promotes vascular endothelial function, whereas is impaired by reactive oxygen species (ROS) in CVD. But PVAT effects on microvessels in HIV are unexplored. We previously reported endothelial dysfunction in living subcutaneous microvascular arterioles (SMAs) dissected from a gluteal biopsy in HIV infected individuals. We test hypothesis that HIV increases microvascular ROS and asymmetric dimethylarginine (ADMA) leading to impair microvascular function and PVAT signaling.

Methods: Isolated SMAs with or without PVAT were prepared from young African American HIV-infected (n=8) and matched HIV-uninfected women (n=6) enrolled in the DC Women’s Interagency HIV Study (DC-WIHS). HIV-infected participants were virally suppressed on HAART without identified CVD risk factors (except obesity). SMA’s acetylcholine (ACh)-induced endothelium dependent relaxation (EDR), nitric oxide (NO) activity (DAF-FM), ACh-induced endothelium dependent contractions (EDC) and ROS generation (temp-9AC), plasma L-arginine, ADMA and adipose adipokines and malondialdehyde (MDA) were measured.

Results: HIV-infected participants had significantly ( p <0.05) reduced plasma ratio of L-arginine : ADMA (99 ± 13 vs 182 ± 32 μmol/μmol), increased adipose MDA (15.1 ± 2.5 vs 10.9 ± 2.6 ng/mg protein) and leptin (40 ± 9 vs 28 ± 7 ng/mg protein); and reduced adiponectin in plasma (14 ± 2 vs 23 ± 2 ng/ml) and in adipose (2.1 ± 0.3 vs 4.6 ± 1.3 ng/mg protein). ACh-induced EDR (57 ± 4 vs 71± 4%) and NO (0.20 ± 0.03 vs 0.58 ± 0.07 Δfluoresce unit) were significantly attenuated (p<0.05) in vessels from HIV-infected participants, whereas EDC (22 ± 2 vs 7 ± 2%) and O 2 - (0.17 ± 0.02 vs 0.09 ± 0.02 Δfluoresce unit) were significantly increased ( p <0.05) . PVAT significantly increased ( p <0.05) EDR (87 ± 3 vs 72 ± 4%) and NO (0.84 ± 0.09 vs 0.58 ± 0.08 Δfluoresce unit) only in control vessels.

Conclusion: HIV-infected individuals have reductions in NO synthase substrate: inhibitor ratio (L-arginine:ADMA) and consequent increased intrinsic vascular effects of ROS leading to disruption of the beneficial microvascular PVAT signaling pathway. Therapeutic targets for vascular dysfunction in HIV should include ROS and its extravascular actions on ADMA and PVAT.

Retrospective Evaluation of Horses Diagnosed with Neuroborreliosis on Postmortem Examination: 16 Cases (2004-2015)

BACKGROUND

Equine neuroborreliosis (NB), Lyme disease, is difficult to diagnose and has limited description in the literature.

OBJECTIVE

Provide a detailed description of clinical signs, diagnostic, and pathologic findings of horses with NB.

ANIMALS

Sixteen horses with histologically confirmed NB.

METHODS

Retrospective review of medical records at the University of Pennsylvania and via an ACVIM listserv query with inclusion criteria requiring possible exposure to Borrelia burgdorferi and histologic findings consistent with previous reports of NB without evidence of other disease.

RESULTS

Sixteen horses were identified, 12 of which had additional evidence of NB. Clinical signs were variable including muscle atrophy or weight loss (12), cranial nerve deficits (11), ataxia (10), changes in behavior (9), dysphagia (7), fasciculations (6), neck stiffness (6), episodic respiratory distress (5), uveitis (5), fever (2), joint effusion (2), and cardiac arrhythmias (1). Serologic analysis was positive for B. burgdorferi infection in 6/13 cases tested. CSF abnormalities were present in 8/13 cases tested, including xanthochromia (4/13), increased total protein (5/13; median: 91 mg/dL, range: 25-219 mg/dL), and a neutrophilic (6/13) or lymphocytic (2/13) pleocytosis (median: 25 nucleated cells/μL, range: 0-922 nucleated cells/μL). PCR on CSF for B. burgdorferi was negative in the 7 cases that were tested.

CONCLUSION AND CLINICAL IMPORTANCE

Diagnosis of equine NB is challenging due to variable clinical presentation and lack of sensitive and specific diagnostic tests. Negative serology and normal CSF analysis do not exclude the diagnosis of NB.

Hypoxia causes increased monocyte nitric oxide synthesis which is mediated by changes in dimethylarginine dimethylaminohydrolase 2 expression in animal and human models of normobaric hypoxia

BACKGROUND

Tissue hypoxia is a cardinal feature of inflammatory diseases and modulates monocyte function. Nitric oxide is a crucial component of the immune cell response. This study explored the metabolism of the endogenous inhibitor of nitric oxide production asymmetric dimethylarginine(ADMA) by monocyte dimethylarginine dimethylaminohydrolase 2(DDAH2), and the role of this pathway in the regulation of the cellular response and the local environment during hypoxia.

METHODS

Peritoneal macrophages were isolated from a macrophage-specific DDAH2 knockout mouse that we developed and compared with appropriate controls. Cells were exposed to 3% oxygen followed by reoxygenation at 21%. Healthy volunteers underwent an 8 h exposure to normobaric hypoxia with an inspired oxygen percentage of 12%. Peripheral blood mononuclear cells were isolated from blood samples taken before and at the end of this exposure.

RESULTS

Intracellular nitrate plus nitrite(NOx) concentration was higher in wild-type murine monocytes after hypoxia and reoxygenation than in normoxia-treated cells (mean(SD) 13·2(2·4) vs 8·1(1·7) pmols/mg protein, p = 0·009). DDAH2 protein was 4·5-fold (SD 1·3) higher than in control cells (p = 0·03). This increase led to a 24% reduction in ADMA concentration, 0·33(0.04) pmols/mg to 0·24(0·03), p = 0·002). DDAH2-deficient murine monocytes demonstrated no increase in nitric oxide production after hypoxic challenge. These findings were recapitulated in a human observational study. Mean plasma NOx concentration was elevated after hypoxic exposure (3·6(1.8)μM vs 6·4(3·2), p = 0·01), which was associated with a reduction in intracellular ADMA in paired samples from 3·6(0.27) pmols/mg protein to 3·15(0·3) (p < 0·01). This finding was associated with a 1·9-fold(0·6) increase in DDAH2 expression over baseline(p = 0·03).

DISCUSSION

This study shows that in both human and murine models of acute hypoxia, increased DDAH2 expression mediates a reduction in intracellular ADMA concentration which in turn leads to elevated nitric oxide concentrations both within the cell and in the local environment. Cells deficient in DDAH2 were unable to mount this response.