Dynamics of magnetization at infinite temperature in a Heisenberg spin chain

Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the one-dimensional Heisenberg model were conjectured as to belong to the Kardar-Parisi-Zhang (KPZ) universality class based on the scaling of the infinite-temperature spin-spin correlation function. In a chain of 46 superconducting qubits, we studied the probability distribution of the magnetization transferred across the chain's center, [Formula: see text]. The first two moments of [Formula: see text] show superdiffusive behavior, a hallmark of KPZ universality. However, the third and fourth moments ruled out the KPZ conjecture and allow for evaluating other theories. Our results highlight the importance of studying higher moments in determining dynamic universality classes and provide insights into universal behavior in quantum systems.

Surgical treatment of canine urethral prolapse via urethropexy or resection and anastomosis

OBJECTIVES

The objective was to report and compare the complications and recurrence rates of urethral prolapse in dogs when treated with urethropexy, resection and anastomosis or a combined surgical technique.

STUDY DESIGN

Retrospective study.

MATERIALS AND METHODS

A total of 86 dogs were identified from the medical records of 10 veterinary referral hospitals from February 2012 and October 2022. Dogs were included if they underwent surgery for a urethral prolapse at first presentation. Complications were classified as minor or major based on the necessity of further surgical intervention. Complications leading to death were also considered major complications.

RESULTS

Seventy-nine dogs were included, urethropexy (n=44), resection and anastomosis (n=27) and a combined surgical technique (n=8). Minor complications were identified in 41 of 79 dogs (51.9%): urethropexy 19 of 44 (43.2%), resection and anastomosis 18 of 27 (66.6%) and a combined surgical technique four of eight (50%). Major complications occurred in 23 dogs (29.1%), of which 21 were recurrence (26.6%). Recurrence occurred in 17 of 44 dogs following a urethropexy (38.6%), three of 27 dogs following resection and anastomosis (11.1%) and one of eight dogs treated with a combined surgical technique (12.5%). Recurrence of a urethral prolapse was significantly more likely following urethropexy in comparison to resection and anastomosis.

CLINICAL SIGNIFICANCE

Resection and anastomosis was associated with a lower recurrence rate in comparison to urethropexy for the surgical treatment of urethral prolapse. Based on these results, we concluded that resection and anastomosis may be preferable to urethropexy for treatment of urethral prolapse at first presentation. Urethropexy, and resection and anastomosis combined surgical technique was associated with low recurrence rate; however, further studies will be needed to clarify if it provides any benefit over resection and anastomosis.

Athletes who have already experienced an injury are more prone to adhere to an injury risk reduction approach than those who do not: an online survey of 7870 French athletics (track and field) athletes

Objective

To compare the perception towards injury risk reduction approach between athletes who have already experienced an injury and those who have not.

Methods

We conducted a cross-sectional study using a one-time online survey asking athletics athletes licensed at the French Federation of Athletics (http://www.athle.fr) about their perceptions regarding injuries and injury risk reduction behaviours. We statistically compared athletes who already experienced an injury and those who did not.

Results

A total of 7870 athletes were included. 90% of athletes declared having experienced at least one injury. They (1) were proportionally more men than women, (2) had significantly more years of experience in athletics, (3) had a significant difference in disciplines (more hurdles, jumps and combined events and fewer sprint athletes), (4) had a significant difference in competition levels (more national and less departmental levels) and (5) reported significantly higher values or agreements in favour of injury risk reduction approach, compared with uninjured athletes. There were significantly more athletes declaring following injury risk reduction programmes among athletes who experienced at least one injury than those who did not.

Conclusions

Athletes who experienced at least one injury during their lifetime were more prone to adhere to injury risk reduction strategies than athletes who have never experienced an injury. Their entourage (coaches and health professionals) should use this fertile ground to implement injury risk reduction strategies. In addition, their experience should be disseminated to uninjured athletes to help them adhere to injury risk reduction without injury experience.

The 7th National Audit Project (NAP7) baseline survey of individual anaesthetists: preparedness for and experiences of peri-operative cardiac arrest

The Royal College of Anaesthetists' 7th National Audit Project baseline survey assessed knowledge, attitudes, practices and experiences of peri-operative cardiac arrests among UK anaesthetists and Anaesthesia Associates. We received 10,746 responses, representing a 71% response rate. In-date training in adult and paediatric advanced life support was reported by 9646 (90%) and 7125 (66%) anaesthetists, respectively. There were 8994 (84%) respondents who were confident in leading a peri-operative cardiac arrest, with males more confident than females, but only 5985 (56%) were confident in leading a debrief and 7340 (68%) communicating with next of kin. In the previous two years, 4806 (46%) respondents had managed at least one peri-operative cardiac arrest, of which 321 (7%) and 189 (4%) of these events involved a child or an obstetric patient, respectively. Respondents estimated the most common causes of peri-operative cardiac arrest to be hypovolaemia, hypoxaemia and cardiac ischaemia, with haemorrhage coming fifth. However, the most common reported causes for the most recently attended peri-operative cardiac arrest were haemorrhage; (927, 20%); anaphylaxis (474, 10%); and cardiac ischaemia (397, 9%). Operating lists or shifts were paused or stopped after 1330 (39%) cardiac arrests and 1693 (38%) respondents attended a debrief, with 'hot' debriefs most common. Informal wellbeing support was relatively common (2458, 56%) and formal support was uncommon (472, 11%). An impact on future care delivery was reported by 196 (4%) anaesthetists, most commonly a negative psychological impact. Management of a peri-operative cardiac arrest during their career was reported by 8654 (85%) respondents. The overall impact on professional life was more often judged positive (2630, 30%) than negative (1961, 23%), but impact on personal life was more often negative.

Bringing uncertainty quantification to the extreme-edge with memristor-based Bayesian neural networks

Safety-critical sensory applications, like medical diagnosis, demand accurate decisions from limited, noisy data. Bayesian neural networks excel at such tasks, offering predictive uncertainty assessment. However, because of their probabilistic nature, they are computationally intensive. An innovative solution utilizes memristors' inherent probabilistic nature to implement Bayesian neural networks. However, when using memristors, statistical effects follow the laws of device physics, whereas in Bayesian neural networks, those effects can take arbitrary shapes. This work overcome this difficulty by adopting a variational inference training augmented by a "technological loss", incorporating memristor physics. This technique enabled programming a Bayesian neural network on 75 crossbar arrays of 1,024 memristors, incorporating CMOS periphery for in-memory computing. The experimental neural network classified heartbeats with high accuracy, and estimated the certainty of its predictions. The results reveal orders-of-magnitude improvement in inference energy efficiency compared to a microcontroller or an embedded graphics processing unit performing the same task.

A multi-organ, lung-derived inflammatory response following in vitro airway exposure to cigarette smoke and next-generation nicotine delivery products

Despite increasing use of in vitro models that closely resemble in vivo human biology, their application in understanding downstream effects of airway toxicity, such as inflammation, are at an early stage. In this study, we used various assays to examine the inflammatory response induced in MucilAir™ tissues and A549 cells exposed to three products known to induce toxicity. Reduced barrier integrity was observed in tissues following exposure to each product, with reduced viability and increased cytotoxicity also shown. Similar changes in viability were also observed in A549 cells. Furthermore, whole cigarette smoke (CS) induced downstream phenotypic THP-1 changes and endothelial cell adhesion, an early marker of atherosclerosis. In contrast, exposure to next-generation delivery product (NGP) aerosol did not induce this response. Cytokine, histological and RNA analysis highlighted increased biomarkers linked to inflammatory pathways and immune cell differentiation following exposure to whole cigarette smoke, including GM-CSF, IL-1β, cleaved caspase-3 and cytochrome P450 enzymes. As a result of similar observations in human airway inflammation, we propose that our exposure platform could act as a representative model for studying such events in vitro. Furthermore, this model could be used to test the inflammatory or anti-inflammatory impact posed by inhaled compounds delivered to the lung.

Comparing in-person, blended and virtual training interventions; a real-world evaluation of HIV capacity building programs in 16 countries in sub-Saharan Africa

We sought to evaluate the impact of transitioning a multi-country HIV training program from in-person to online by comparing digital training approaches implemented during the pandemic with in-person approaches employed before COVID-19. We evaluated mean changes in pre-and post-course knowledge scores and self-reported confidence scores for learners who participated in (1) in-person workshops (between October 2019 and March 2020), (2) entirely asynchronous, Virtual Workshops [VW] (between May 2021 and January 2022), and (3) a blended Online Course [OC] (between May 2021 and January 2022) across 16 SSA countries. Learning objectives and evaluation tools were the same for all three groups. Across 16 SSA countries, 3023 participants enrolled in the in-person course, 2193 learners participated in the virtual workshop, and 527 in the online course. The proportions of women who participated in the VW and OC were greater than the proportion who participated in the in-person course (60.1% and 63.6%, p<0.001). Nursing and midwives constituted the largest learner group overall (1145 [37.9%] vs. 949 [43.3%] vs. 107 [20.5%]). Across all domains of HIV knowledge and self-perceived confidence, there was a mean increase between pre- and post-course assessments, regardless of how training was delivered. The greatest percent increase in knowledge scores was among those participating in the in-person course compared to VW or OC formats (13.6% increase vs. 6.0% and 7.6%, p<0.001). Gains in self-reported confidence were greater among learners who participated in the in-person course compared to VW or OC formats, regardless of training level (p<0.001) or professional cadre (p<0.001). In this multi-country capacity HIV training program, in-person, online synchronous, and blended synchronous/asynchronous strategies were effective means of training learners from diverse clinical settings. Online learning approaches facilitated participation from more women and more diverse cadres. However, gains in knowledge and clinical confidence were greater among those participating in in-person learning programs.

Subtle introgression footprints at the end of the speciation continuum in a clade of Heliconius butterflies

Quantifying gene flow between lineages at different stages of the speciation continuum is central to understanding speciation. Heliconius butterflies have undergone an adaptive radiation in wing colour patterns driven partly by natural selection for local mimicry. Colour patterns are also known to be used as assortative mating cues. Therefore, wing pattern divergence is considered to play a role in speciation. A corollary is that mimicry between closely-related species may be associated with hybridization and interfere with reproductive isolation. Here, we take a multifaceted approach to explore speciation history, species boundaries, and traits involved in species differentiation between the two closely-related species H. hecale and H. ismenius. We focus on geographic regions where the two species mimic each other, and contrast this with geographic regions where they do not mimic each other. To examine population history and patterns of gene flow, we tested and compared a four-population model accounting for linked selection. This model suggests that the two species have remained isolated for a large part of their history, yet with a small amount of gene exchange. Accordingly, signatures of genomic introgression were small except at a major wing pattern allele and chemosensing genes, and stronger in the mimetic populations compared to non-mimetic populations. Behavioural assays confirm that visual confusion exists but that short-range cues determine strong sexual isolation. Tests for chemical differentiation between species identified major differences in putative pheromones which likely mediate mate choice and the maintenance of species differences.

Multimodality Imaging in HIV-Associated Cardiovascular Complications: A Comprehensive Review

Human immunodeficiency virus (HIV) infection is a leading cause of mortality and morbidity worldwide. The introduction of antiretroviral therapy (ART) has significantly reduced the risk of developing acquired immune deficiency syndrome and increased life expectancy, approaching that of the general population. However, people living with HIV have a substantially increased risk of cardiovascular diseases despite long-term viral suppression using ART. HIV-associated cardiovascular complications encompass a broad spectrum of diseases that involve the myocardium, pericardium, coronary arteries, valves, and systemic and pulmonary vasculature. Traditional risk stratification tools do not accurately predict cardiovascular risk in this population. Multimodality imaging plays an essential role in the evaluation of various HIV-related cardiovascular complications. Here, we emphasize the role of multimodality imaging in establishing the diagnosis and aetiopathogenesis of various cardiovascular manifestations related to chronic HIV disease. This review also provides a critical appraisal of contemporary data and illustrative cases.

Non-overweight depressed patients who respond to antidepressant treatment have a higher risk of later metabolic syndrome: findings from the METADAP cohort

BACKGROUND

Major depressive disorder (MDD) is a complex disorder with a significant public health burden. Depression remission is often associated with weight gain, a major risk factor for metabolic syndrome (MetS). The primary objective of our study was to assess prospectively the impact of response to antidepressant treatment on developing MetS in a sample of MDD patients with a current major depressive episode (MDE) and who are newly initiating their treatment.

METHODS

In the 6-month prospective METADAP cohort, non-overweight patients, body mass index <25 kg/m2, with MDD and a current MDE were assessed for treatment response after 3 months of treatment, and incidence of MetS after 3 and 6 months of treatment. Outcome variables were MetS, number of MetS criteria, and each MetS criterion (high waist circumference, high blood pressure, high triglyceridemia, low high-density lipoprotein-cholesterolemia, and high fasting plasma glucose).

RESULTS

In total, 98/169 patients (58%) responded to treatment after 3 months. A total of 2.7% (1/38) developed MetS out of which 12.7% (10/79) (p value < 0.001) had responded to treatment after 3 months. The fixed-effect regression models showed that those who responded to treatment after 3 months of follow-up had an 8.6 times higher odds of developing MetS (odds ratio = 8.58, 95% confidence interval 3.89-18.93, p value < 0.001).

CONCLUSION

Compared to non-responders, non-overweight patients who responded to treatment after 3 months of antidepressant treatment had a significantly higher risk of developing MetS during the 6 months of treatment. Psychiatrists and nurses should closely monitor the metabolic profile of their patients, especially those who respond to treatment.

Coronary angiography using spectral detector dual-energy CT: is it the time to assess myocardial first-pass perfusion?

Coronary computed tomography angiography (CCTA) represents a common approach to the diagnostic workup of patients with suspected coronary artery disease. Technological development has recently allowed the integration of conventional CCTA information with spectral data. Spectral CCTA used in clinical routine may allow for improving CCTA diagnostic performance by measuring myocardial iodine distribution as a marker of first-pass perfusion, thus providing additional functional information about coronary artery disease.

Methods of the 7th National Audit Project (NAP7) of the Royal College of Anaesthetists: peri-operative cardiac arrest

Cardiac arrest in the peri-operative period is rare but associated with significant morbidity and mortality. Current reporting systems do not capture many such events, so there is an incomplete understanding of incidence and outcomes. As peri-operative cardiac arrest is rare, many hospitals may only see a small number of cases over long periods, and anaesthetists may not be involved in such cases for years. Therefore, a large-scale prospective cohort is needed to gain a deep understanding of events leading up to cardiac arrest, management of the arrest itself and patient outcomes. Consequently, the Royal College of Anaesthetists chose peri-operative cardiac arrest as the 7th National Audit Project topic. The study was open to all UK hospitals offering anaesthetic services and had a three-part design. First, baseline surveys of all anaesthetic departments and anaesthetists in the UK, examining respondents' prior peri-operative cardiac arrest experience, resuscitation training and local departmental preparedness. Second, an activity survey to record anonymised details of all anaesthetic activity in each site over 4 days, enabling national estimates of annual anaesthetic activity, complexity and complication rates. Third, a case registry of all instances of peri-operative cardiac arrest in the UK, reported confidentially and anonymously, over 1 year starting 16 June 2021, followed by expert review using a structured process to minimise bias. The definition of peri-operative cardiac arrest was the delivery of five or more chest compressions and/or defibrillation in a patient having a procedure under the care of an anaesthetist. The peri-operative period began with the World Health Organization 'sign-in' checklist or first hands-on contact with the patient and ended either 24 h after the patient handover (e.g. to the recovery room or intensive care unit) or at discharge if this occured earlier than 24 h. These components described the epidemiology of peri-operative cardiac arrest in the UK and provide a basis for developing guidelines and interventional studies.

Smoking during pregnancy and children’s emotional and behavioural trajectories

Background

The nature of the relationship between maternal tobacco smoking during pregnancy and the occurrence of children's behavioural problems is still a matter of controversy. We tested this association using data collected among a sample of children followed from pregnancy to early adolescence (age 11.5 years), accounting for multiple parents’, children's and family characteristics.

Methods

Data come from 1424 mother-child pairs participating in the EDEN mother-child cohort set up in France. Using repeated measures (3, 5.5, 8 and 11.5 years) of the mother-reported Strengths and Difficulties Questionnaire, we estimated trajectories of children's emotional and behavioural difficulties. Two aspects of maternal smoking were studied: the timing and the level of use (cigarettes/day) during the first trimester of pregnancy. Multinomial regression models controlled for confounding factors including maternal mental health and socioeconomic characteristics using propensity scores with the overlap weighting technique.

Results

Contrary to bivariate analyses, in propensity score-controlled regression models, maternal smoking throughout pregnancy was no longer significantly associated with offspring emotional or behavioural difficulties. Maternal heavy smoking (≥10cigarettes/day) remained significantly associated with intermediate levels of overall emotional and behavioural difficulties (OR 1.64, 95%CI 1.04-2.58) and conduct problems (OR 3.05 95%CI 1.22-7.61), as well as with high levels of conduct problems symptoms (OR 2.82 95%CI 0.88-9.06) - although the latter did not reach statistical significance.

Conclusions

The association between maternal smoking in pregnancy and offspring emotional and behavioural difficulties appears to be largely explained by women's other characteristics. However, maternal heavy smoking appears to be related to offspring behavioural difficulties beyond the role of confounding characteristics.

Key messages

• The association between maternal smoking in pregnancy and offspring emotional and behavioural difficulties seem largely explained by the family's socio-demographic and behavioural characteristics.

• Maternal heavy smoking appears to be related to offspring behavioural difficulties beyond the role of confounding characteristics.

Comparison of low-density lipoprotein cholesterol equations in patients with dyslipidaemia receiving cholesterol ester transfer protein inhibition

Background

Low-density lipoprotein (LDL-C) lowering is imperative in cardiovascular disease prevention. Effectively translating the evidence for LDL-C lowering to maximize clinical and public health benefits depends on the availability of accurate LDL-C results from clinical laboratories to guide therapy. Furthermore, prior work has raised the possibility that cholesterol esterase transfer protein (CETP) inhibition could interfere with accurate assessment of LDL-C.

Purpose

We aimed to compare accuracy of three clinically implemented LDL-C equations in a clinical trial of CETP inhibition.

Methods

Men and women aged 18–75 years with dyslipidaemia were recruited from 17 sites in the Netherlands and Denmark. Patients were randomly assigned to one of nine groups using various combinations of the CETP inhibitor TA-8995, statin therapy, and placebo. In pooled measurements over 12 weeks, we calculated LDL-C by the Friedewald, Martin/Hopkins, and Sampson equations, and compared values with preparative ultracentrifugation (PUC) LDL-C as the reference measure (also known as “beta quantification”). Based on prior literature and dyslipidaemia guidelines, we examined correct classifications across the LDL-C 1.81 mmol/L cutpoint in the subgroup of patients with triglycerides of 1.69–4.51 mmol/L.

Results

The analysis included 242 patients contributing 921 observations. The full distributions of differences between LDL-C estimates and PUC are shown in Figure 1. Overall median LDL-C differences between estimates and PUC were small: Friedewald, 0.00 (25th, 75th: −0.10, 0.08) mmol/L; Martin/Hopkins, 0.02 (−0.08, 0.10) mmol/L; and Sampson, 0.05 (−0.03, 0.15) mmol/L. In the subgroup with estimated LDL-C &lt;1.81 mmol/L and triglycerides 1.69–4.51 mmol/L, the Friedewald equation underestimated LDL-C with a median difference versus PUC of −0.25 (−0.33, −0.10) mmol/L, whereas the Martin/Hopkins equation corrected this issue with a median difference of 0.00 (−0.08, 0.10) mmol/L and the Sampson equation showed tendency towards underestimation with a median difference of −0.06 (−0.13, 0.00) mmol/L. In patients with triglyceride levels of 1.69–4.51 mmol/L, Figure 2 shows the proportion of LDL-C levels classified by the equations as &lt; or ≥1.81 mmol/L that were correctly classified when compared with PUC. All three equations showed &gt;95% accuracy when estimated LDL-C levels were ≥1.81 mmol/L. However, the proportion of LDL-C observations &lt;1.81 mmol/L that were correctly classified compared with PUC was 71.4% by Friedewald versus 100.0% by Martin/Hopkins and 93.1% by Sampson.

Conclusion

In Europeans with dyslipidaemia, our analysis shows improved accuracy in LDL-C when using contemporary LDL-C equations over the Friedewald equation, particularly when using the Martin/Hopkins equation. High levels of accuracy with the Martin/Hopkins equation were seen in individuals treated with CETP inhibition and even in the context of low LDL-C and high triglyceride levels.

Funding Acknowledgement

Type of funding sources: Private company. Main funding source(s): Dezima and NewAmsterdam Pharma

Long-term cardiac pathology in individuals with mild initial COVID-19 illness

Cardiac symptoms are increasingly recognized as late complications of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in previously well individuals with mild initial illness, but the underlying pathophysiology leading to long-term cardiac symptoms remains unclear. In this study, we conducted serial cardiac assessments in a selected population of individuals with Coronavirus Disease 2019 (COVID-19) with no previous cardiac disease or notable comorbidities by measuring blood biomarkers of heart injury or dysfunction and by performing magnetic resonance imaging. Baseline measurements from 346 individuals with COVID-19 (52% females) were obtained at a median of 109 days (interquartile range (IQR), 77-177 days) after infection, when 73% of participants reported cardiac symptoms, such as exertional dyspnea (62%), palpitations (28%), atypical chest pain (27%) and syncope (3%). Symptomatic individuals had higher heart rates and higher imaging values or contrast agent accumulation, denoting inflammatory cardiac involvement, compared to asymptomatic individuals. Structural heart disease or high levels of biomarkers of cardiac injury or dysfunction were rare in symptomatic individuals. At follow-up (329 days (IQR, 274-383 days) after infection), 57% of participants had persistent cardiac symptoms. Diffuse myocardial edema was more pronounced in participants who remained symptomatic at follow-up as compared to those who improved. Female gender and diffuse myocardial involvement on baseline imaging independently predicted the presence of cardiac symptoms at follow-up. Ongoing inflammatory cardiac involvement may, at least in part, explain the lingering cardiac symptoms in previously well individuals with mild initial COVID-19 illness.

POS1052 DEVELOPING EVIDENCE-BASED PATIENT FOCUSED LEARNING MATERIALS TO SUPPORT HEALTH BEHAVIOUR CHANGE FOR PEOPLE LIVING WITH PSORIATIC ARTHRITIS

Background

Psoriatic arthritis (PsA) is a complex condition that requires high levels of self-management from those living with the condition. It is associated with many comorbidities, including depression, metabolic syndrome, and increased cardiovascular disease risk and can adversely affect quality of life. There is growing evidence that people living with psoriatic arthritis (PsA) are more likely to be overweight, consume alcohol above recommended levels, smoke, be affected by poor sleep, fatigue, anxiety, and take insufficient exercise for healthy living. These modifiable health behaviours further increase the already known risk of cardiovascular morbidity and mortality. These issues are not systematically addressed in routine clinical care due to low confidence in effective delivery and time constraints.

Objectives

To co-develop evidence-based patient-focused learning materials to support healthy lifestyle changes for people living with PsA.

Methods

The development of the materials was overseen by a steering group of people living with PsA, psychologists, rheumatologists, and researchers. The COM-B model was used in the development of the materials, and they are designed around motivational interviewing principles. Firstly, a systematic literature review was performed to establish the evidence for the current burden and potential interventions aimed at these issues in PsA. These included diet, weight, alcohol, smoking, exercise, anxiety, depression, and stress. An initial focus group of people living with PsA was used to identify priority behaviours and ideas for content.

The steering group developed draft materials, and we partnered with a design agency to create engaging materials. They developed a website and downloadable postcards. A second focus made up of people living with PsA was held for people to give their views on the draft content for the materials and initial design ideas. A third focus group was held with people living with PsA and a fourth with clinicians to refine the design materials and ensure they were accessible, interesting, and helpful to initiate and maintain change. A final evaluation survey was performed to review the draft website before launching the final materials. The Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) approved the final materials.

Results

Following the steering and focus groups’ input, 15 candidate topics were prioritised (Table 1). A website and downloadable postcards summarising each of the topics were developed by the design team and refined following feedback from the patient focus groups. An example of the postcard for ‘keeping active’ can be found in Figure 1. The resources are free to use and can be accessed at https://www.informatree.org.

Table 1.Topics1Pain2Fatigue3Healthcare appointments4Tobacco5Different treatments6Alcohol7Work8Social support9Food and weight10Sleep11Keeping active12Mood13Intimacy14Travel15Using treatmentsFigure 1.

During the development of the website and downloadable postcards, particular attention was paid to making the material as accessible and as friendly as possible for patients.

Conclusion

This project created patient-focused information to support behaviour change in clinical practice. It addresses common concerns of people living with PsA about how they may optimise their health by providing practical and brief interventions to challenge and support them to make personal changes. Future research is needed to test the impact of the resource.

Acknowledgements

This research project was funded by a Medical Education Grant from Pfizer. SK was funded by Cancer Research UK (grant C49297/A27294).

Disclosure of Interests

Louise Hailey: None declared, Christine Bundy Consultant of: Over the last 3 years, I have received funds for consultancy from the following pharmaceutical companies: Abbvie, Almirall, Amgen (was Celgene), Beiersdorf, Janssen, Novartis, Pfizer, UCB., Grant/research support from: Over the last 3 years, I have received funds for research and honoraria from the following pharmaceutical companies: Abbvie, Almirall, Amgen (was Celgene), Beiersdorf, Janssen, Novartis, Pfizer, UCB., Laura Howells: None declared, Shona Kirtley: None declared, Sam Martin: None declared, Denis O’Sullivan: None declared, Ingrid Steinkoenig: None declared, Melissa Stepney: None declared, Laura Coates Speakers bureau: LCC has been paid as a speaker for AbbVie, Amgen, Biogen, Celgene, Eli Lilly, Galapagos, Gilead, GSK, Janssen, Medac, Novartis, Pfizer and UCB.

, Consultant of: LCC has worked as a paid consultant for AbbVie, Amgen, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Eli Lilly, Gilead, Galapagos, Janssen, Moonlake, Novartis, Pfizer and UCB., Grant/research support from: LCC has received grants/research support from AbbVie, Amgen, Celgene, Eli Lilly, Janssen, Novartis, Pfizer and UCB.

A case of myocarditis after COVID-19 vaccination: incidental or consequential?

Vaccination represents one of the fundamentals in the fight against SARS-CoV-2. Myocarditis has been reported as a rare but possible adverse consequence of different vaccines, and its clinical presentation can range from mild symptoms to acute heart failure. We report a case of a 29-year-old man who presented with fever and retrosternal pain after receiving SARS-CoV-2 vaccine. Cardiac magnetic resonance imaging and laboratory data revealed typical findings of acute myocarditis.

Salvaging low contrast abdominal CT studies using noise-optimised virtual monoenergetic image reconstruction

Objectives

To assess the impact of noise-optimised virtual monoenergetic imaging (VMI+) on image quality and diagnostic evaluation in abdominal dual-energy CT scans with impaired portal-venous contrast.

Methods

We screened 11,746 patients who underwent portal-venous abdominal dual-energy CT for cancer staging between 08/2014 and 11/2019 and identified those with poor portal-venous contrast.Standard linearly-blended image series and VMI+ image series at 40, 50, and 60 keV were reconstructed. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of abdominal organs and vascular structures were calculated. Image noise, image contrast and overall image quality were rated by three radiologists using 5-point Likert scale.

Results

452 of 11,746 (4%) exams were poorly opacified. We excluded 190 cases due to incomplete datasets or multiple exams of the same patient with a final study group of 262. Highest CNR values in all abdominal organs (liver, 6.4 ± 3.0; kidney, 17.4 ± 7.5; spleen, 8.0 ± 3.5) and vascular structures (aorta, 16.0 ± 7.3; intrahepatic vein, 11.3 ± 4.7; portal vein, 15.5 ± 6.7) were measured at 40 keV VMI+ with significantly superior values compared to all other series. In subjective analysis, highest image contrast was seen at 40 keV VMI+ (4.8 ± 0.4), whereas overall image quality peaked at 50 keV VMI+ (4.2 ± 0.5) with significantly superior results compared to all other series (p < 0.001).

Conclusions

Image reconstruction using VMI+ algorithm at 50 keV significantly improves image contrast and image quality of originally poorly opacified abdominal CT scans and reduces the number of non-diagnostic scans.

Advances in knowledge

We validated the impact of VMI+ reconstructions in poorly attenuated DECT studies of the abdomen in a big data cohort.

French athletics stakeholders' perceptions of relevance and expectations on injury prevention

This study aimed to explore how stakeholders in athletics perceived the relevance of injury prevention, determine their communication preferences, and describe their expectations regarding injury prevention. We conducted a cross-sectional study using an exploratory online survey with high-level athletes (i.e., listed by the French ministry of sports), non-high-level athletes (i.e., all competitive level except high-level athletes), coaches, and health professionals licensed with the French Federation of Athletics. There were 2,864 responders to the survey. Almost all responders found that injury prevention is relevant (97.7% [95% CI 97.0% to 98.2%]), without any significant differences in the distribution between stakeholders' age, experience and sex (p > 0.05). About three-quarters of the stakeholders preferred to find injury prevention information on a website (77.4%) without significant differences between stakeholders' categories (p > 0.05); other media to find injury prevention information was chosen by less than 50% of responders. Expectations about injury prevention were mainly explanations, advice and tips about injury knowledge, management and prevention, based on expert opinion and/or scientific research. In conclusion, these results confirm that injury prevention is a challenge shared by numerous stakeholders in athletics, within France, and provide some orientation on how and what information to disseminate to these stakeholders.

177Lu-DOTA-0-Tyr3-octreotate infusion modeling for real-time detection and characterization of extravasation during PRRT

PURPOSE

Given the recent and rapid development of peptide receptor radionuclide therapy (PRRT), increasing emphasis should be placed on the early identification and quantification of therapeutic radiopharmaceutical (thRPM) extravasation during intravenous administration. Herein, we provide an analytical model of 177Lu-DOTA0-Tyr3-octreotate (Lutathera®) infusion for real-time detection and characterization of thRPM extravasation.

METHODS

For 33 Lutathera®-based PRRT procedures using the gravity infusion method, equivalent dose rates (EDRs) were monitored at the patient's arm. Models of flow dynamics for nonextravasated and extravasated infusions were elaborated and compared to experimental data through an equivalent dose rate calibration. Nonextravasated infusion was modeled by assuming constant volume dilution of 177Lu activity concentration in the vial and Poiseuille-like laminar flow through the tubing and patient vein. Extravasated infusions were modeled according to their onset times by considering elliptically shaped extravasation region with different aspect ratios.

RESULTS

Over the 33 procedures, the peak of the median EDR was reached 14 min after the start of the infusion with a value of 450 µSv h-1. On the basis of experimental measurements, 1 mSv h-1 was considered the empirical threshold for Lutathera® extravasation requiring cessation of the infusion and start again with a new route of injection. According to our model, the concentration of extravascular activity was directly related to the time of extravasation onset and its duration, a finding inherent in the gravity infusion method. This result should be considered when planning therapeutic strategy in the case of RPM extravasation because the local absorbed dose for β-emitters is closely linked to activity concentration. For selected EDR values, charts of extravasated activity, volume, and activity concentration were computed for extravasation characterization.

CONCLUSION

We proposed an analytical model of Lutathera® infusion and extravasation (gravity method) based on EDR monitoring. This approach could be useful for the early detection of thRPM extravasation and for the real-time assessment of activity concentration and volume accumulation in the extravascular medium.

With a new role comes new responsibilities: interviews to explore what Emergency Department Pharmacist Practitioners know and understand about patient safeguarding

Introduction

In the UK, pharmacists with additional clinical skills now work in emergency departments (1). Known as Emergency Department Pharmacist Practitioners (EDPPs), the role was developed in response to a shortage of doctors and nurses. EDPPs carry out activities typical of traditional hospital pharmacists, but also novel ‘practitioner’ activities such as examining patients. They also may act as designated care providers with overall responsibility for patients, which includes a responsibility to safeguard patients (children and vulnerable adults) from harm – as is required of other healthcare professionals who take on that role. The initial safeguarding process comprises four stages: recognition, ensuring safety, documentation and escalation. Professional competence, i.e. to safeguard patients, is underpinned by knowledge of the subject, but also the ability to apply that knowledge (2).

Aim

To investigate what EDPPs know and understand about safeguarding vulnerable children and adults.

Methods

Past and current students of an ‘Advanced Specialist Training in Emergency Medicine’ programme, which delivers additional clinical skills to pharmacists, were interviewed to explore their knowledge and understanding of safeguarding. Interview questions were developed from review of relevant literature, as were four vignettes which were used to further explore participants’ understanding i.e. apply their knowledge of safeguarding to realistic scenarios. Vignettes concerned victims of: theft, sexual abuse, physical abuse and a medication error. A Social Worker reviewed the vignettes for plausibility, suggesting changes e.g. to victim characteristics. The interview schedule and vignettes were then piloted by two acute medicine pharmacists. For analysis, interview transcripts were reviewed with template analysis used to code data to four a priori themes (stages of the initial safeguarding process), and new themes that emerged throughout the process.

Results

Thirteen EDPPs were interviewed (four in 2016, and then a further nine in 2019 following delays due to competing research commitments). In addition to the four a priori themes, a further six themes were identified: scope of safeguarding; responsibility to safeguard; resources and setting; education, training and experiential learning; multidisciplinary working and communication; and culture. Overall, participants had a broad and often detailed knowledge of safeguarding. All four stages were frequently described which demonstrates EDPPs awareness of how safeguarding concerns are both recognised and responded to. Somewhat unsurprisingly, participants were generally more comfortable when responding to medicines related concerns although whether these should be reported via safeguarding or error systems is currently unclear. Several participants were more involved with the formal escalation of issues, and one participant had safeguarding issues escalated to them and had given evidence in court.

Conclusion

Although interview phases were three years apart, no thematic differences were identified between these phases and thematic saturation was also achieved. EDPPs interviewed were aware of the different types of maltreatment and the safeguarding process. Safeguarding training for pharmacists should include a focus on the importance of good inter-professional communication. Training should also include information about the types of medication error (e.g. type and severity) that require escalation via safeguarding, but these first need to be confirmed through future research.

References

(1) Greenwood D, Tully MP, Martin S, Steinke D. The description and definition of Emergency Department Pharmacist Practitioners in the United Kingdom (the ENDPAPER study). International journal of clinical pharmacy. 2019 Apr;41(2):434-44.

(2) James KL, Davies JG, Kinchin I, Patel JP, Whittlesea C. Understanding vs. competency: the case of accuracy checking dispensed medicines in pharmacy. Advances in health sciences education. 2010 Dec;15(5):735-47.

Nitric Oxide Synthase activity in major depressive episodes before and after antidepressant treatment: Results of a large case-control treatment study

BACKGROUND

Nitric oxide synthase (NOS) activity, an enzyme potentially involved in the major depressive episodes (MDE), could be indirectly measured by the L-Citrulline/L-Arginine ratio (L-Cit/L-Arg). The aim of this study was: (1) to compare the NOS activity of patients with a MDE to that of healthy controls (HC); (2) to assess its change after antidepressant treatment.

METHODS

A total of 460 patients with a current MDE in a context of major depressive disorder (MDD) were compared to 895 HC for NOS activity (L-Cit/L-Arg plasma ratio). L-Arg and L-Cit plasma levels were measured using a MS-based liquid chromatography method. Depressed patients were assessed at baseline, and after 3 and 6 months of antidepressant treatment for depression severity and clinical response.

RESULTS

Depressed patients had a lower NOS activity than HC at baseline [0.31 ± 0.09 v. 0.38 ± 0.12; 95% confidence interval (CI) -0.084 to -0.062, p < 0.0001]. Lower NOS activity at baseline predicted a higher response rate [odds ratio (OR) = 29.20; 95% CI 1.58-536.37; p = 0.023]. NOS activity in depressed patients increased significantly up to 0.34 ± 0.08 after antidepressant treatment (Est = 0.0034; 95% CI 0.0002-0.0067; p = 0.03).

CONCLUSIONS

Depressed patients have a decreased NOS activity that improves after antidepressant treatment and predicts drug response. NOS activity may be a promising biomarker for MDE in a context of MDD.

Development of the Manchester framework for the evaluation of emergency department pharmacy services

BACKGROUND

Many countries, including the United Kingdom, have established Emergency Department (ED) pharmacy services where some ED pharmacists now work as practitioners. They provide both traditional pharmaceutical care and novel practitioner care i.e. clinical examination, yet their impact on quality of care is unknown.

AIM

To develop a framework of structures, processes and potential outcome indicators to support evaluation of the quality of ED pharmacy services in future studies.

METHOD

Framework components (structures, processes and potential outcome indicators) were identified in three ways: from a narrative review of relevant international literature, and separate panel meetings with ED pharmacists and then other ED healthcare professionals. Structures and processes were collated into categories developed iteratively throughout data collection, with outcome indicators collated into six domains of quality as proposed by the Institute of Medicine. These raw data were then processed e.g. outcome indicators screened for clarity i.e. those which explicitly stated what would be measured were included in the framework.

RESULTS

A total of 190 structures, 533 processes, and 503 outcome indicators were identified. Through data processing a total of 153 outcome indicators were included in the final framework divided into the domains safe (32), effective (50), patient centred (18), timely (24), efficient (20) and equitable (9).

CONCLUSION

The first framework specific to the quality evaluation ED pharmacy services, service evaluators should validate potential outcome indicators prior to their use. The minimum expected of a high-quality service should also be defined to enable interpretation of relevant measurements.

Determinants of the adoption of injury risk reduction programmes in athletics (track and field): an online survey of 7715 French athletes

OBJECTIVES

To identify individual characteristics associated with the adoption of injury risk reduction programmes (IRRP) and to investigate the variations in sociocognitive determinants (ie, attitudes, subjective norms, perceived behavioural control and intentions) of IRRP adoption in athletics (track and field) athletes.

METHODS

We conducted a cross-sectional study using an online survey sent to athletes licensed with the French Federation of Athletics to investigate their habits and sociocognitive determinants of IRRP adoption. Sociodemographic characteristics, sports practice and history of previous injuries were also recorded. Logistic regression analyses and group comparisons were performed.

RESULTS

The final sample was composed of 7715 athletes. From the multivariable analysis, competing at the highest level was positively associated with IRRP adoption (adjusted OR (AOR)=1.66; 99.9% CI 1.39 to 1.99 and AOR=1.48; 99.9% CI 1.22 to 1.80) and presenting a low number of past injuries was negatively associated with IRRP adoption (AOR=0.48; 99.9% CI 0.35 to 0.65 and AOR=0.61; 99.9% CI 0.44 to 0.84), both during their lifetime and the current season, respectively. These results were supported by higher scores of sociocognitive determinants among athletes who reported IRRP adoption compared with other athletes.

CONCLUSION

Some characteristics of athletes seem to be associated with IRRP adoption either positively (competing at the highest level) or negatively (presenting a lower number of past injuries), whereas all the sociocognitive determinants tested appear to be linked to IRRP adoption. Since many athlete characteristics are difficult or impossible to change, IRRP promotion may be enhanced by targeting athletes' beliefs and intentions to adopt an IRRP.

Mechanical modifications of soft actuators for the use as a dynamic iris implant

Aniridia is a condition characterized by defects or absence of the iris. Since the eyes are a central point of attention in the human face, these deformities are often covered with cosmetic implants. However, patients suffer from the static pupil diameter of these implants, resulting in high light sensitivity or inadequate night vision. Therefore, we present a functional iris implant based on dielectric elastomer actuators. These electric drives are characterized by a silent and continuous adaptation as well as a small construction volume and a low heat emission. Since they normally exhibit in-plane uniaxial motion, this displacement must be focused to operate similarly to the iris sphincter. Therefore, we investigated possible mechanical modifications of the setups to generate a directional motion. The results of the study are presented and discussed.Clinical Relevance- The proposed system design enables the functional treatment of aniridia and other accidental iris defects. In addition, the system serves as a basis for later developments of e.g. functional lenses that allow focus adjustment.

Intraurethral Energy Harvesting from Urine Flow as an Approach to Power Urologic Implants

Active urologic implants, such as bladder stimulators or artificial sphincters, are a widely-used approach for therapy of urinary incontinence. At present these devices are powered by primary batteries or conventional wireless power transferring techniques. As these methods are associated with several limitations, human body energy harvesting can be a promising alternative or complement for power supply. This paper introduces an approach to harvest energy from the urine flow inside the urethra with a mechatronic harvesting system based on a hubless flow turbine. Using a test bench approximating the flow conditions of the lower urinary tract, the feasibility of the harvesting principle is shown in-vitro.

Bacillus cereus Bacteremia: An Unusual Case Following Food Poisoning

Introduction/Objective

Bacillus cereus is a spore-forming, gram-positive rod, well known for causing food poisoning. In addition, this bacterium often presents as a contaminant of blood cultures. Differentiating true bacteremia from contamination of blood samples is important as it has treatment implications. Early recognition is necessary, as it can cause septic shock if untreated. We present a challenging case of food poisoning with concomitant bacteremia in a young patient with a history of diabetes mellitus (DM), celiac disease, and new-onset chronic kidney disease (CKD).

Methods/Case Report

A 23-year-old adult male with a history of DM, new-onset CKD, and celiac disease presented with nausea, intermittent vomiting, and lower abdominal pain for 2 weeks. On initial evaluation, he had normal blood pressure but tachypnea and tachycardia. Physical examination was significant for left lower quadrant and flank tenderness. The symptoms were persistent and progressed to point that he could not tolerate meals due to vomiting. Two weeks earlier, he presented with similar complaints along with dysuria and was treated for suspected urinary tract infection with Co-trimoxazole. This time, further workup revealed normal white blood cell count (11.8 k/µL) with 81% neutrophils, elevated creatinine (3.56 mg/dL), blood urea nitrogen (49 mg/dL), and procalcitonin (0.39 ng/mL), with abnormal urinalysis showing increased turbidity, pyuria, and nitrituria. He was started on ceftriaxone, fluids, antiemetics and was admitted to the hospital for further management. The urine culture had no bacterial growth. Two sets of peripheral blood cultures (different sites at different times) had gram-positive rods which eventually turned out to be B. cereus, identified by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). Levofloxacin was started, and he reported improvement in nausea and vomiting by the next day of admission and was discharged.

Results (if a Case Study enter NA)

NA

Conclusion

Differentiating true B. cereus bacteremia from blood sample contamination is important. Additionally, no symptoms are specific for B. cereus-associated food poisoning, and the presence of risk factors doesn’t always favor this entity over other entities, hence adding difficulty to the diagnosis. A high index of suspicion is needed, as early intervention can prevent the development of life-threatening complications.

Adopting digital health interventions for secondary prevention of cardiovascular disease: clinician perspectives

Background

Cardiovascular disease (CVD) remains the leading cause of death globally, taking an estimated 18 million lives each year. Digital health interventions (DHI), such as wearables and smartphone applications, have shown promise in CVD detection, prevention, and management. However, there are scarce data regarding clinician perspectives on the utility of DHI and identification of key elements to support adoption in clinical practice.

Method

In this cross-sectional study, a web-based survey was administered to 107 clinicians directly involved in the care of cardiac inpatients across multiple academic health care systems in the United States, between January 2020 and March 2021. Participants (1) reported their perceptions of DHI impact on their ability to care for patients with CVD, (2) rated the importance of factors related to DHI adoption, and (3) shared perspectives on using DHI for secondary CVD prevention to support guideline-directed medical therapy in patients after acute myocardial infarction. Descriptive statistics were analyzed and summarized as frequencies with percentages.

Results

Among survey respondents, 41% were women; 22% specialized in cardiovascular medicine; and 31% were practicing attendings (Table). Overall, 92% (86/94) of respondents believed that DHI would be important in offering advantages in cardiovascular patient care (Figure). Increasing patient adherence was reported as the most important benefit of DHI adoption by 39% of clinicians, followed by improvement in the patient-clinician relationship (29%), enabling remote care (18%), and improving patient experience (14%). Clinicians under age 40 years old, cardiologists, and internists were the groups more likely to consider DHI important in remote patient care, disease monitoring, and tele-visits, as compared to clinicians over age 40 years old or in other clinical specialties.

Conclusion

Our results highlight clinician perspectives on the advantages of DHI and the potential for its adoption for secondary prevention of CVD.

Funding Acknowledgement

Type of funding sources: None. Table 1. Characteristics of RespondentsFigure 1. Clinician Survey

Patterns of cardiac involvement in patients with long COVID syndrome using cardiovascular magnetic resonance

Background

Long COVID (LC) is an increasingly recognized late complication of COVID-19 infection. Cardiovascular involvement has also been implicated, however, the type and extent of the underlying cardiovascular injury remains unknown.

Purpose

To evaluate the association between ongoing symptoms and findings with cardiovascular magnetic resonance (CMR) in consecutive patients recently recovered from COVID-19 illness.

Methods

Prospective observational cohort study of patients recently recovered from COVID-19 illness and no previously known cardiovascular disease were included between April 2020 and April 2021. Demographic characteristics, cardiac blood markers, and CMR imaging a minimum of 4 weeks from the diagnosis were obtained.

Results

Of the 389 included patients, 192 (49%) were male, the mean (±standard deviation) age was 44 (±13) years and 61 (16%) required hospitalization during the acute illness. The median (IQR) time interval between COVID-19 diagnosis and CMR was 94 (71–165) days. 298 (77%) of patients continued to experience ongoing cardiovascular symptoms (long COVID, LC), including dyspnea, palpitations, atypical chest pain and fatigue at the time of CMR at least 4 weeks after the infection. In most patients, the symptoms were only effort related 137 (46%), whereas in 98 (33%) the symptoms affected the activities of daily life; 10 (3%) had severe and debilitating symptoms at rest. Compared to those with no LC (NLC, n=91), LC patients were more commonly hospitalized, had significantly higher native T1, native T2, and showed pericardial enhancement and effusion (Figure 1). There were no differences in cardiac biomarkers, left ventricular (LV) and right ventricular ejection fraction and mass. Proportionally, men and women were similarly affected (n=144 (73%) vs. n=157 (80%), p=0.18). Previous hospitalization was associated with hypertension and ongoing detectable troponin. LC status was associated with previous hospitalization and CMR findings of raised native T1 and native T2, and in females also pericardial enhancement. Severity of symptoms were associated with increased native T1 and T2 and decreased end-diastolic volume, whereas cardiac function showed no significant difference.

Conclusions

In this cohort of patients recently recovered from COVID-19 infection, ongoing cardiovascular symptoms were common. The LC status was related to previous hospitalization and CMR imaging findings of myopericardial inflammation. The extent and type of cardiovascular findings was associated with the severity of symptoms. These findings indicate the need for ongoing investigation of the long-term cardiovascular consequences of COVID-19.

Funding Acknowledgement

Type of funding sources: Foundation. Main funding source(s): The German Heart Foundation (Deutsche Herzstiftung) and Bayer AG, Leverkusen, Germany

Clinical risk score for individualized risk stratification of patients with clinically suspected myocardial inflammation

Objective

To develop a clinical risk score for individualized risk stratification of patients with clinically suspected myocardial inflammation.

Background

Myocardial inflammation is a prominent cause of non-ischaemic dilated cardiomyopathy, heart failure (HF) and sudden cardiac death.

Methods

This is a prospective multicentre longitudinal study of consecutive patients referred to cardiac magnetic resonance (CMR) with clinically suspected myocardial inflammation between October 2011 and December 2019 as a part of standard diagnostic pathway. Patients were followed up from the date of CMR. The outcome endpoints included major adverse cardiovascular event (MACE, cardiovascular mortality, sudden cardiac death, appropriate device discharge); or death or hospitalisation due to HF). A prognostic model was developed using Cox proportional hazards analysis and validated internally and externally.

Results

The final dataset included 722 subjects (50 years (40–61); males 422 (58%)). During a follow-up period of median 19 (15–23) months, there were 64 (9%) MACE and 130 (18%) HF events. Ten predictor variables qualified for entry into the prognostic model: age, sex, hematocrit, C-reactive protein, high-sensitive troponin-T (TNT), left and right ventricular ejection fraction, native T1 and T2, and late gadolinium enhancement (LGE). The final multivariable Cox regression model included native T2 (Figure 1A), TNT and LGE (Figure 1B) for the primary (Chi-square: 102.0, p&lt;0.001) and secondary endpoint (Chi-square: 166.9, p&lt;0.001), respectively. Cross-validation as well as external validation of the secondary models revealed good performance and no healthcare system effect. Based on the MyoRISK Score, patients were classified into three risk groups with respective event rates for MACE of 0%, 6.3% and 25.1%, and HF endpoint of 1.8%, 17.3% and 44.2%. TNT≥7 pg/ml allowed to efficiently preselect patients prior to CMR.

Conclusions

This is the first systematic assessment of outcomes in patients with clinically suspected myocardial inflammation, providing a non-invasive estimation of the probability of adverse events based on a score using readily available clinical parameters.

Funding Acknowledgement

Type of funding sources: Public Institution(s). Main funding source(s): DZHK

935 Identification and Management of Electrolyte Abnormalities in Surgical Patients Requiring Total Parenteral Nutrition: An Audit of Current Practice at A University Hospital

Aim

Electrolyte abnormalities are a common and serious consequence of nutritional deficiencies when patients are nil-by-mouth. Timely intervention with a multidisciplinary approach is known to improve outcome. This audit aimed to assess adequacy of initial electrolyte management and timing of dietetics referral in acute surgical patients requiring total parenteral nutrition in a university hospital.

Method

A retrospective audit of all general surgery patients referred to dietetics for total parenteral nutrition between January-December 2019 was performed. The following audit standards (from the time following admission) were applied: monitoring of electrolytes every 48-hours, treatment of electrolyte abnormalities within 24-hours of discovery; and referral to the dietetics service within 48-hours of nil-by-mouth being commenced.

Results

Data from 52 patients (27 females, median age 66) were analysed. Fifty-one (98%) had electrolytes measured every 48-hours, however magnesium, phosphate and/or calcium were not measured prior to dietetics input in 9 (17%). Forty electrolyte abnormalities requiring treatment were found in 28 patients (54%), though only 18 (64%) commenced treatment within 24-hours. The most common electrolyte abnormalities not corrected within 24-hours were phosphate and calcium (50%). 46% of patients were referred to dietetics after 48-hours of nil-by-mouth status.

Conclusions

In our unit, we found that basic electrolytes were frequently monitored in patients placed nil-by-mouth, however calcium, phosphate and magnesium were often omitted prior to dietetics input, and correction of abnormalities was sometimes delayed. Introduction of a local protocol-based approach for electrolyte monitoring with streamlined dietetics referrals is likely to improve adherence to best practice.

779 An Unusual Manifestation of Tophaceous Gout in The Flexor Digitorum Superficialis Tendon of An Immunocompromised Patient: A Case Report and Literature Review

Aim

This case report showcases an unusual presentation of tophaceous gout, in an immunocompromised patient. Furthermore, through a literature review, we highlight challenges posed by immunocompromised patients, the clinical manifestations of gout in the hand and principles of management.

Method

We report the case of a 62-year-old lady with previous liver transplant on immunosuppressants. She was admitted with a left palmar abscess, pyogenic tenosynovitis of the index finger and was taken to theatre for debridement and washout. Superimposed infection was apparent. This originated from an exophytic mass extending from the palm to FDS tendon insertion. This was debulked and histologically confirmed as gout. A review of the literature was performed using key search terms on PubMed relating to manifestations of gout in the tendons of the hand, and in patients on immunosuppression.

Results

Reports in the literature describe cases of gouty tendinopathy in both flexor and extensor tendons. Reported symptoms include triggering, tendon rupture and tenosynovitis. Gout occurs in a higher frequency in transplant patients. This can be attributed to medications such as cyclosporine which predispose to hyperuricaemia. Management of this condition involves medical optimisation. Despite concurrent problems with wound healing in the immunocompromised with gout, surgical intervention may be required. Indications include superimposed infection, attenuated tendon glide, joint movement, and neuropathy. Perioperative antibiotics are recommended in all immunocompromised patients.

Conclusions

This case highlights an unusual presentation of gout and the challenges of managing patients on immunosuppressant therapy. A greater awareness of this condition will allow for appropriate management in this high-risk patient cohort.

1488 Cosmetic Tourism in Aesthetic Breast Surgery

Introduction

Medical tourism is expanding on a global basis, with patients seeking cosmetic surgery in countries abroad. Little information is known regarding the risks and outcomes of cosmetic tourism, in particular, for aesthetic breast surgery.

Method

A systematic-review was conducted using the PRISMA (Preferred Reporting Items for Systematic-reviews and Meta-analyses) guidelines. Fifty-seven titles were screened, 42 abstracts were reviewed leaving 30 full texts. Twenty-one of these met the inclusion criteria.

Results

One-hundred and fifty patients partook in cosmetic tourism for aesthetic breast surgery. Forty-two percent of patients had an implant-based procedure. Other procedures included mastopexy (n = 4), bilateral breast reduction (n = 10) and silicone injections (n = 2). One-hundred and sixty complications were recorded, common complications included wound infection 31% (n = 46), breast abscess/ collection 14% (n = 21), wound dehiscence 12% (n = 18) and ruptured implant 9% (n = 13). Clavien-Dindo classification of complications includes 67 (45%) IIIb-complications with 78 returns-to-theatre, 2 class-IV complications (ICU stay) and one class-V-death of a patient. Explanation occurred in 38% (n = 24) of implant-based augmentation patients.

Conclusions

Aesthetic breast surgery tourism is popular within the cosmetic tourism industry. However, with infective complications (31%) and return-to-theatre rates (45%) significantly higher than expected, it is clear that having these procedures abroad significantly increases the risks involved. Professional bodies for cosmetic surgery in each country must highlight and educate patients how to lower this risk if they do choose to have cosmetic surgery abroad. In this current era of an intra-pandemic world where healthcare is already stretched, the burden from cosmetic tourism complications must be minimised.

1337 A Regional Review of The Epidemiology and Pathological Characteristics of Malignant Melanoma in Northern Ireland (NI), And Correlation with Socio-Economic Status

Introduction

The incidence of cutaneous malignant melanoma is increasing. Internationally, there is evidence of an association between melanoma incidence and higher socioeconomic status (SES). This study aims to assess the characteristics of patients with melanoma in NI, and correlate to SES.

Method

Retrospective review of electronic records for patients undergoing surgery for melanoma at the Northern Ireland Plastic Surgery Unit from August 2015 to March 2020. Patients were identified from theatre records and a prospectively collected sentinel lymph node database. The NI Multiple Deprivation Measure 2017 was used to measure SES.

Results

440 patients were included (F = 54%, M = 46%). Mean age=63 (M = 67, F = 59). Mean Breslow Depth (BD) = 2.61mm (Range 0.17 – 27mm). Females had significantly thinner tumours at presentation (mean BD 2.16mm. vs 3.1mm in males, p = 0.001). In males the commonest sites were head and neck (36%) and back (23%). In females, the commonest sites were lower limb (42%) and upper limb (23%). There was a positive correlation between higher SES and increased incidence of melanoma (correlation coefficient (CC) 0.922), but this did not correlate with an increase in Breslow depth (CC -0.020).

Conclusions

This study provides important information on melanoma in NI, including gender and site variances. Females were more commonly affected and were a mean of 8 years younger than males at diagnosis but presented with significantly thinner tumours. Unlike the rest of the UK, the commonest site in males was the head and neck. Higher SES was related to higher incidence of melanoma but with presentation at an earlier stage of disease.

Transitioning into the workforce during the COVID-19 pandemic: Understanding the experiences of student diagnostic radiographers

Introduction

The COVID-19 pandemic, with associated pressures on healthcare services and workforce, had implications for final year Diagnostic Radiography students completing their training and transitioning into employment. The aim of this study was to explore their experience as novice practitioners starting work and integrating into the workforce during a time of national crisis.

Methods

Five early career Diagnostic Radiographers, eligible to join the temporary HCPC register, were recruited. One to one interviews were completed online exploring their thoughts, feelings and experiences. Participants had the option of using photographs to aid communication.

Results

Interviews were transcribed, emerging themes identified and coded. Four main themes emerged specifically related to the COVID-19 pandemic, (i) perceived challenges associated with joining the workforce, (ii) managing expectations and unexpected outcomes during transition, (iii) adapting to changes in systems and structures, (iv) sense of uncertainty relating to professional identity. The impacts were experienced beyond the work environment into social and personal lives. Participants demonstrated resilience as they adapted to their shifting lives and drew on the support of clinical colleagues and University academics for help. They did report feelings of concern and anxiety. The participants all expressed a sense of feeling valued and supported in their new roles.

Conclusion

The Pandemic was unprecedented and created uncertainty in terms of workforce requirements. This study highlights the personal impact and professional responses of novice practitioners, who felt a sense of duty and care to help support the NHS and others.

Implications for practice

This will help in the understanding of the transition of student into employment and what wider support needs to be in place prior, during and after this phase.

Virtual non-calcium dual-energy CT: clinical applications

Dual-energy CT (DECT) has emerged into clinical routine as an imaging technique with unique postprocessing utilities that improve the evaluation of different body areas. The virtual non-calcium (VNCa) reconstruction algorithm has shown beneficial effects on the depiction of bone marrow pathologies such as bone marrow edema. Its main advantage is the ability to substantially increase the image contrast of structures that are usually covered with calcium mineral, such as calcified vessels or bone marrow, and to depict a large number of traumatic, inflammatory, infiltrative, and degenerative disorders affecting either the spine or the appendicular skeleton. Therefore, VNCa imaging represents another step forward for DECT to image conditions and disorders that usually require the use of more expensive and time-consuming techniques such as magnetic resonance imaging, positron emission tomography/CT, or bone scintigraphy. The aim of this review article is to explain the technical background of VNCa imaging, showcase its applicability in the different body regions, and provide an updated outlook on the clinical impact of this technique, which goes beyond the sole improvement in image quality.

Postoperative radiological assessment of the mastoid facial canal in cochlear implant patients in correlation with facial nerve stimulation

Objectives

To correlate the radiological assessment of the mastoid facial canal in postoperative cochlear implant (CI) cone-beam CT (CBCT) and other possible contributing clinical or implant-related factors with postoperative facial nerve stimulation (FNS) occurrence.

Methods

Two experienced radiologists evaluated retrospectively 215 postoperative post-CI CBCT examinations. The mastoid facial canal diameter, wall thickness, distance between the electrode cable and mastoid facial canal, and facial-chorda tympani angle were assessed. Additionally, the intracochlear position and the insertion angle and depth of electrodes were evaluated. Clinical data were analyzed for postoperative FNS within 1.5-year follow-up, CI type, onset, and causes for hearing loss such as otosclerosis, meningitis, and history of previous ear surgeries. Postoperative FNS was correlated with the measurements and clinical data using logistic regression.

Results

Within the study population (mean age: 56 ± 18 years), ten patients presented with FNS. The correlations between FNS and facial canal diameter (p = 0.09), wall thickness (p = 0.27), distance to CI cable (p = 0.44), and angle with chorda tympani (p = 0.75) were statistically non-significant. There were statistical significances for previous history of meningitis/encephalitis (p = 0.001), extracochlear-electrode-contacts (p = 0.002), scala-vestibuli position (p = 0.02), younger patients’ age (p = 0.03), lateral-wall-electrode type (p = 0.04), and early/childhood onset hearing loss (p = 0.04). Histories of meningitis/encephalitis and extracochlear-electrode-contacts were included in the first two steps of the multivariate logistic regression.

Conclusion

The mastoid-facial canal radiological assessment and the positional relationship with the CI electrode provide no predictor of postoperative FNS. Histories of meningitis/encephalitis and extracochlear-electrode-contacts are important risk factors.

Key Points

• Post-operative radiological assessment of the mastoid facial canal and the positional relationship with the CI electrode provide no predictor of post-cochlear implant facial nerve stimulation.

• Radiological detection of extracochlear electrode contacts and the previous clinical history of meningitis/encephalitis are two important risk factors for postoperative facial nerve stimulation in cochlear implant patients.

• The presence of scala vestibuli electrode insertion as well as the lateral wall electrode type, the younger patient’s age, and early onset of SNHL can play important role in the prediction of post-cochlear implant facial nerve stimulation.