Showing papers by "St Thomas' Hospital published in 2022"

An MR fingerprinting approach for quantitative inhomogeneous magnetization transfer imaging.

Abstract: PURPOSE Magnetization transfer (MT) and inhomogeneous MT (ihMT) contrasts are used in MRI to provide information about macromolecular tissue content. In particular, MT is sensitive to macromolecules, and ihMT appears to be specific to myelinated tissue. This study proposes a technique to characterize MT and ihMT properties from a single acquisition, producing both semiquantitative contrast ratios and quantitative parameter maps. THEORY AND METHODS Building on previous work that uses multiband RF pulses to efficiently generate ihMT contrast, we propose a cyclic steady-state approach that cycles between multiband and single-band pulses to boost the achieved contrast. Resultant time-variable signals are reminiscent of an MR fingerprinting acquisition, except that the signal fluctuations are entirely mediated by MT effects. A dictionary-based low-rank inversion method is used to reconstruct the resulting images and to produce both semiquantitative MT ratio and ihMT ratio maps, as well as quantitative parameter estimates corresponding to an ihMT tissue model. RESULTS Phantom and in vivo brain data acquired at 1.5 Tesla demonstrate the expected contrast trends, with ihMT ratio maps showing contrast more specific to white matter, as has been reported by others. Quantitative estimation of semisolid fraction and dipolar T1 was also possible and yielded measurements consistent with literature values in the brain. CONCLUSION By cycling between multiband and single-band pulses, an entirely MT-mediated fingerprinting method was demonstrated. This proof-of-concept approach can be used to generate semiquantitative maps and quantitatively estimate some macromolecular-specific tissue parameters.

Rapid risk stratification of acute coronary syndrome: adoption of an adapted European Society of Cardiology 0/1-hour troponin algorithm in a real-world setting

Abstract: To evaluate the clinical feasibility of implementing the 2020 ESC 0/1 hr algorithm for rapid rule-out/rule-in of acute coronary syndrome (ACS).Data were collected retrospectively from 5496 patients in 2020 and 7363 patients in 2021 who received cardiac troponin measurements through the ACS algorithm in acute care settings within a large tertiary cardiac centre in the United Kingdom. This period overlapped the introduction of the 2020 ESC 0/1 hr algorithm. After exclusion of haemolysis, 1905 patients underwent repeat troponin measurement within the study period in 2020 and 2658 in 2021. Median time to repeat was significantly reduced from 3 h 14 min for intermediate low risk patients (5-12 ng/L) in 2020 to 1 h 22 min in 2021, and from 3 h 30 min to 1 h 59 min in intermediate high-risk patients (12-51 ng/L). Less than 15% of patients requiring repeat testing had dynamic changes in troponin of sufficient magnitude to change their initial risk category. Of all patients, 58.1% of patients in 2020 were ultimately classified as 'low risk', 19.2% deemed 'ACS likely', and 22.7% as 'ACS possible', with similar distributions in 2021.Whilst an efficient algorithm, our study demonstrates multi-faceted, practical limitations of achieving the 1 h target for the triage of patients with suspected ACS. Despite challenges predominantly of logistic nature, the algorithm enables rapid, streamlined, and efficient triage of large patient cohorts. Further work is required to streamline this process and achieve the targeted 1 h repeat in a resource-constrained healthcare environment, which would invariably require second blood draw before the result of first, as recommended by the ESC.

Transfer of thawed frozen embryo versus fresh embryo to improve the healthy baby rate in women undergoing IVF: the E-Freeze RCT

Abstract: Background Freezing all embryos, followed by thawing and transferring them into the uterine cavity at a later stage (freeze-all), instead of fresh-embryo transfer may lead to improved pregnancy rates and fewer complications during in vitro fertilisation and pregnancies resulting from it. Objective We aimed to evaluate if a policy of freeze-all results in a higher healthy baby rate than the current policy of transferring fresh embryos. Design This was a pragmatic, multicentre, two-arm, parallel-group, non-blinded, randomised controlled trial. Setting Eighteen in vitro fertilisation clinics across the UK participated from February 2016 to April 2019. Participants Couples undergoing their first, second or third cycle of in vitro fertilisation treatment in which the female partner was aged < 42 years. Interventions If at least three good-quality embryos were present on day 3 of embryo development, couples were randomly allocated to either freeze-all (intervention) or fresh-embryo transfer (control). Outcomes The primary outcome was a healthy baby, defined as a live, singleton baby born at term, with an appropriate weight for their gestation. Secondary outcomes included ovarian hyperstimulation, live birth and clinical pregnancy rates, complications of pregnancy and childbirth, health economic outcome, and State–Trait Anxiety Inventory scores. Results A total of 1578 couples were consented and 619 couples were randomised. Most non-randomisations were because of the non-availability of at least three good-quality embryos ( n = 476). Of the couples randomised, 117 (19%) did not adhere to the allocated intervention. The rate of non-adherence was higher in the freeze-all arm, with the leading reason being patient choice. The intention-to-treat analysis showed a healthy baby rate of 20.3% in the freeze-all arm and 24.4% in the fresh-embryo transfer arm (risk ratio 0.84, 95% confidence interval 0.62 to 1.15). Similar results were obtained using complier-average causal effect analysis (risk ratio 0.77, 95% confidence interval 0.44 to 1.10), per-protocol analysis (risk ratio 0.87, 95% confidence interval 0.59 to 1.26) and as-treated analysis (risk ratio 0.91, 95% confidence interval 0.64 to 1.29). The risk of ovarian hyperstimulation was 3.6% in the freeze-all arm and 8.1% in the fresh-embryo transfer arm (risk ratio 0.44, 99% confidence interval 0.15 to 1.30). There were no statistically significant differences between the freeze-all and the fresh-embryo transfer arms in the live birth rates (28.3% vs. 34.3%; risk ratio 0.83, 99% confidence interval 0.65 to 1.06) and clinical pregnancy rates (33.9% vs. 40.1%; risk ratio 0.85, 99% confidence interval 0.65 to 1.11). There was no statistically significant difference in anxiety scores for male participants (mean difference 0.1, 99% confidence interval –2.4 to 2.6) and female participants (mean difference 0.0, 99% confidence interval –2.2 to 2.2) between the arms. The economic analysis showed that freeze-all had a low probability of being cost-effective in terms of the incremental cost per healthy baby and incremental cost per live birth. Limitations We were unable to reach the original planned sample size of 1086 and the rate of non-adherence to the allocated intervention was much higher than expected. Conclusion When efficacy, safety and costs are considered, freeze-all is not better than fresh-embryo transfer. Trial registration This trial is registered as ISRCTN61225414. Funding This project was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment ; Vol. 26, No. 25. See the NIHR Journals Library website for further project information.

Measures Against Antimicrobial Resistance in Children in Japan: Current Status and Future Prospects

Abstract: Antimicrobial resistance (AMR) is a major problem in public health. Japan is addressing this problem with various measures based on the National Action Plan on AMR, published in 2016. In Japan, the fight against AMR is hindered by issues with the health care system, including the lack of a general practitioner registration system, an abundance of private clinics and health care for infants and toddlers being essentially free of charge. As measures against AMR in inpatient care, thorough infection prevention and the Japanese government's incentivization of collaboration in infection prevention among hospitals and regions have helped to improve infection prevention. As measures against AMR in outpatient care, the creation of official Japanese government guidelines on antimicrobial stewardship has facilitated the implementation of antimicrobial stewardship in clinics. Another unique measure taken in Japan is incentivizing the nonprescription of antimicrobials for respiratory tract infections and diarrhea. Although Asia is a hot spot for AMR bacteria, the fight against AMR is affected by various factors, including insufficient precautions against nosocomial infections and the absence of surveillance systems. To combat these problems, Japan must take a strong leadership role. AMR is a problem not only at the level of individual countries but on a global scale and should, therefore, be addressed through joint action among nations.

Peripapillary and optic nerve head vessel density of glaucoma and healthy subjects from Afro-Caribbean and European descent: A pilot study

Abstract: To compare the peripapillary and optic nerve head vessel density (PP-ONH VD) between glaucoma patients (all, early, moderated, and advanced) and healthy subjects of Afro-Caribbean descent (AD) and European descent (ED).This was a cross-sectional study. One eye was evaluated in 90 subjects, including 66 glaucoma patients and 24 healthy subjects, who underwent PP-ONH VD imaging using SPECTRALIS® Optical Coherence Tomography Angiography (OCT-A). We analysed the superficial vascular complex using the AngioTool version 0.6a software. The correlation between the PP-ONH VD and visual field mean deviation (MD) was evaluated using a scatter plot and Spearman's rho correlation coefficient.Among the healthy subjects, the AD group had a lower superficial PP-ONH VD [43.29±3.25% (mean±standard deviation)] than the ED group (46.06±1.75%) (P=0.016). Overall, superficial PP-ONH VD did not show any significant differences between the total AD and ED glaucoma patients or in the subgroup analyses (early/moderate/advanced) (AD: 32.73±6.70%, 37.11±5.72%, 32.48±5.73%, 27.76±4.74%, respectively; ED: 33.94±6.89%, 38.52±3.82%, 35.56±4.18%; 27.65±6.31%, respectively) (P>0.05 for all). A strong, statistically significant correlation was established between vessel density and mean deviation among AD and ED glaucoma patients (r=0.709 and r=0.704, respectively) (P<0.001 for both).This pilot study shows that healthy subjects of AD had lower peripapillary and optic nerve head superficial vessel density than healthy subjects of ED, but no significant differences were found between AD and ED glaucoma groups (all, early, moderate, or advanced).

Indications for and Timing of Initiation of KRT

Abstract: KRT is considered for patients with severe AKI and associated complications. The exact indications for initiating KRT have been debated for decades. There is a general consensus that KRT should be considered in patients with AKI and medically refractory complications ("urgent indications"). "Relative indications" are more common but defined with less precision. In this review, we summarize the latest evidence from recent landmark clinical trials, discuss strategies to anticipate the need for KRT in individual patients, and propose an algorithm for decision making. We emphasize that the decision to consider KRT should be made in conjunction with other forms of organ support therapies and important nonkidney factors, including the patient's preferences and overall goals of care. We also suggest future research to differentiate patients who benefit from timely initiation of KRT from those with imminent recovery of kidney function. Until then, efforts are needed to optimize the initiation and delivery of KRT in routine clinical practice, to minimize nonessential variation, and to ensure that patients with persistent AKI or progressive organ failure affected by AKI receive KRT in a timely manner.

Tissue engineered in-vitro vascular patch fabrication using hybrid 3D printing and electrospinning

Abstract: Three-dimensional (3D) engineered cardiovascular tissues have shown great promise to replace damaged structures. Specifically, tissue engineering vascular grafts (TEVG) have the potential to replace biological and synthetic grafts. We aimed to design an in-vitro patient-specific patch based on a hybrid 3D print combined with vascular smooth muscle cells (VSMC) differentiation. Based on the medical images of a 2 months-old girl with aortic arch hypoplasia and using computational modelling, we evaluated the most hemodynamically efficient aortic patch surgical repair. Using the designed 3D patch geometry, the scaffold was printed using a hybrid fused deposition modelling (FDM) and electrospinning techniques. The scaffold was seeded with multipotent mesenchymal stem cells (MSC) for later maturation to derived VSMC (dVSMC). The graft showed adequate resistance to physiological aortic pressure (burst pressure 101 ​± ​15 ​mmHg) and a porosity gradient ranging from 80 to 10 ​μm allowing cells to infiltrate through the entire thickness of the patch. The bio-scaffolds showed good cell viability at days 4 and 12 and adequate functional vasoactive response to endothelin-1. In summary, we have shown that our method of generating patient-specific patch shows adequate hemodynamic profile, mechanical properties, dVSMC infiltration, viability and functionality. This innovative 3D biotechnology has the potential for broad application in regenerative medicine and potentially in heart disease prevention.

Test–retest repeatability and interobserver variation of healthy tissue metabolism using 18F-FDG PET/CT of the thorax among lung cancer patients

Abstract: Objectives The aim of this study was to assess the test–retest repeatability and interobserver variation in healthy tissue (HT) metabolism using 2-deoxy-2-[18F]fluoro-d-glucose (18F-FDG) PET/computed tomography (PET/CT) of the thorax in lung cancer patients. Methods A retrospective analysis was conducted in 22 patients with non-small cell lung cancer who had two PET/CT scans of the thorax performed 3 days apart with no interval treatment. The maximum, mean and peak standardized uptake values (SUVs) in different HTs were measured by a single observer for the test–retest analysis and two observers for interobserver variation. Bland–Altman plots were used to assess the repeatability and interobserver variation. Intrasubject variability was evaluated using within-subject coefficients of variation (wCV). Results The wCV of test–retest SUVmean measurements in mediastinal blood pool, bone marrow, skeletal muscles and lungs was less than 20%. The left ventricle (LV) showed higher wCV (>60%) in all SUV parameters with wide limits of repeatability. High interobserver agreement was found with wCV of less than 10% in SUVmean of all HT, but up to 22% was noted in the LV. Conclusion HT metabolism is stable in a test–retest scenario and has high interobserver agreement. SUVmean was the most stable metric in organs with low FDG uptake and SUVpeak in HTs with moderate uptake. Test–retest measurements in LV were highly variable irrespective of the SUV parameters used for measurements.

Reporting errors in plain radiographs for lower limb trauma—a systematic review and meta-analysis

Abstract: Plain radiographs are a globally ubiquitous means of investigation for injuries to the musculoskeletal system. Despite this, initial interpretation remains a challenge and inaccuracies give rise to adverse sequelae for patients and healthcare providers alike. This study sought to address the limited, existing meta-analytic research on the initial reporting of radiographs for skeletal trauma, with specific regard to diagnostic accuracy of the most commonly injured region of the appendicular skeleton, the lower limb. A prospectively registered, systematic review and meta-analysis was performed using published research from the major clinical-science databases. Studies identified as appropriate for inclusion underwent methodological quality and risk of bias analysis. Meta-analysis was then performed to establish summary rates for specificity and sensitivity of diagnostic accuracy, including covariates by anatomical site, using HSROC and bivariate models. A total of 3887 articles were screened, with 10 identified as suitable for analysis based on the eligibility criteria. Sensitivity and specificity across the studies were 93.5% and 89.7% respectively. Compared with other anatomical subdivisions, interpretation of ankle radiographs yielded the highest sensitivity and specificity, with values of 98.1% and 94.6% respectively, and a diagnostic odds ratio of 929.97. Interpretation of lower limb skeletal radiographs operates at a reasonably high degree of sensitivity and specificity. However, one in twenty true positives is missed on initial radiographic interpretation and safety netting systems need to be established to address this. Virtual fracture clinic reviews and teleradiology services in conjunction with novel technology will likely be crucial in these circumstances.

Infective endocarditis following invasive dental procedures: IDEA case-crossover study

Abstract: Background Infective endocarditis is a heart infection with a first-year mortality rate of ≈ 30%. It has long been thought that infective endocarditis is causally associated with bloodstream seeding with oral bacteria in ≈ 40–45% of cases. This theorem led guideline committees to recommend that individuals at increased risk of infective endocarditis should receive antibiotic prophylaxis before undergoing invasive dental procedures. However, to the best of our knowledge, there has never been a clinical trial to prove the efficacy of antibiotic prophylaxis and there is no good-quality evidence to link invasive dental procedures with infective endocarditis. Many contend that oral bacteria-related infective endocarditis is more likely to result from daily activities (e.g. tooth brushing, flossing and chewing), particularly in those with poor oral hygiene. Objective The aim of this study was to determine if there is a temporal association between invasive dental procedures and subsequent infective endocarditis, particularly in those at high risk of infective endocarditis. Design This was a self-controlled, case-crossover design study comparing the number of invasive dental procedures in the 3 months immediately before an infective endocarditis-related hospital admission with that in the preceding 12-month control period. Setting The study took place in the English NHS. Participants All individuals admitted to hospital with infective endocarditis between 1 April 2010 and 31 March 2016 were eligible to participate. Interventions This was an observational study; therefore, there was no intervention. Main outcome measure The outcome measure was the number of invasive and non-invasive dental procedures in the months before infective endocarditis-related hospital admission. Data sources NHS Digital provided infective endocarditis-related hospital admissions data and dental procedure data were obtained from the NHS Business Services Authority. Results The incidence rate of invasive dental procedures decreased in the 3 months before infective endocarditis-related hospital admission (incidence rate ratio 1.34, 95% confidence interval 1.13 to 1.58). Further analysis showed that this was due to loss of dental procedure data in the 2–3 weeks before any infective endocarditis-related hospital admission. Limitations We found that urgent hospital admissions were a common cause of incomplete courses of dental treatment and, because there is no requirement to record dental procedure data for incomplete courses, this resulted in a significant loss of dental procedure data in the 2–3 weeks before infective endocarditis-related hospital admissions. The data set was also reduced because of the NHS Business Services Authority’s 10-year data destruction policy, reducing the power of the study. The main consequence was a loss of dental procedure data in the critical 3-month case period of the case-crossover analysis (immediately before infective endocarditis-related hospital admission), which did not occur in earlier control periods. Part of the decline in the rate of invasive dental procedures may also be the result of the onset of illness prior to infective endocarditis-related hospital admission, and part may be due to other undefined causes. Conclusions The loss of dental procedure data in the critical case period immediately before infective endocarditis-related hospital admission makes interpretation of the data difficult and raises uncertainty over any conclusions that can be drawn from this study. Future work We suggest repeating this study elsewhere using data that are unafflicted by loss of dental procedure data in the critical case period. Trial registration This trial is registered as ISRCTN11684416. Funding This project was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment ; Vol. 26, No. 28. See the NIHR Journals Library website for further project information.

Priorities and Understanding of Pregnancy Among Women With Congenital Heart Disease

Abstract: Many women with congenital heart disease (CHD) desire safe and successful pregnancies, but a significant proportion does not seek prepregnancy counseling. This study aims to distinguish the personal priorities and perceptions about pregnancy in this growing population. Women aged 18 to 50 years with CHD were enrolled from 2 sites. Using a mixed-methods approach (Q-methodology), 179 participants sorted 23 statements representing a collection of views on pregnancy using priority forced ranking along a scale from “strongly agree” to “strongly disagree.” Majority of women were between 25 and 29 years of age, had moderate or severely complex CHD, and were married. Five unique group identities were elucidated from patient responses. Group 1 was centered around a strong desire to start a family. Women in group 2 had significant anxiety, and their psychological wellbeing interfered with their decision to start a family. Women in group 3 were concerned about premature death; if they do have kids, they want to be alive to see them grow old. Women in group 4 had strong objections to termination. Group 5 valued health care engagement. Group identities were unrelated to CHD complexity and demographic factors such as age and marital status. Six differentiating statements were identified that help distinguish which group a woman aligns with. Women with CHD have diverse priorities and values relating to pregnancy and heart disease. This study used a mixed-methods approach to provide a framework identifying several domains for targeted prepregnancy counseling in women with CHD.

Efficacy of attention bias modification via smartphones in a large population sample

Abstract: Negative affective biases are a key feature of anxiety and depression that uphold and promote negative mood. Bias modification aims to reduce these biases using computerized training, but shows mixed success and has not been tested at scale. The aim was to determine whether bias modification delivered via smartphones can improve mood in a large sample. In total, 153 385 self-referring participants were randomly assigned to modification or sham bias training on a dot-probe or visual-search task. The primary outcome of interest was balance of mood, assessed on the Positive and Negative Affect Schedule. In total, 22 933 participants who provided at least two mood ratings were included in analyses. There was a large amount of participant attrition. In the remaining smaller sample, results supported the prediction that visual-search modification would result in improved mood (95%CI [0.10, 0.82]; p = 0.01, d = 0.05, N = 2588 after two ratings; 95%CI [1.75,6.54]; p = 0.001, d = 0.32, N = 118 after six ratings), which was not seen for the sham version (N = 4818 after two ratings; N = 138 after six ratings). Dot-probe modification was not associated with mood improvements (p = 0.52). Visual-search, but not dot-probe, bias modification slightly but significantly improved mood. Although this effect size is very small and subject to large participant drop-off, it might be worth considering an adjunct to current treatments.

Post-tonsillectomy advice: the UK patient experience

Abstract: Abstract Objective Tonsillectomy is a common surgical procedure in the UK. This study critically examined the current advice provided by UK hospitals to patients about post-operative care. Method Post-tonsillectomy patient advice sheets were obtained from 110 UK National Health Service trusts and equivalent organisations. Their contents were analysed and compared with published literature to determine whether the advice being given to patients was evidence-based. Results Post-tonsillectomy dietary and fluid intake advice varied between hospitals; although many recommended eating and drinking a normal diet (88 per cent), some recommended eating ‘hard’ (26 per cent) or ‘soft’ (8 per cent) foods. Non-evidence based advice given included avoiding fizzy drinks (21 per cent), fruit juices (9 per cent) and using chewing gum (51 per cent). Reported post-operative risks and safety-netting also varied. Conclusion Much of the advice in the available printed information appeared to be anecdotal and not based on, or was contrary to, published evidence. After review of the literature, an evidence-based post-tonsillectomy patient advice sheet was generated for dissemination.

Mediterranean climates during Dansgaard-Oechger cycles in the last glacial period

Abstract: &lt;p&gt;We investigate the impact of rapid climate changes during the Dansgaard-Oeschger cycles of the last glacial on the climate of the Mediterranean region. We reconstructed the temperature of the coldest and warmest months, growing season warmth, and plant-available moisture (MI) from 20 published pollen cores from Iberia to Iran, using frequency corrected tolerance-weighted weighted average partial least squares (fxTWA-PLS) method. We corrected the MI reconstructions to account for the direct physiological impact of changing CO&lt;sub&gt;2&lt;/sub&gt; levels on plant water-use efficiency. We found warm intervals &amp;#8211; probable GIs - by identifying potential D-O warmings using their signature asymmetrical rise and fall. Cold climate intervals &amp;#8211; considered as the most extreme expression of the GSs - were defined as periods when growing season warmth was below the long-term average value for each individual record.&lt;/p&gt;&lt;p&gt;Warm intervals are characterised by a decrease in moisture in the western Mediterranean compared to the preceding cold interval. Sites in the eastern Mediterranean show either no change in moisture between the two states or are characterised by a slight increase in moisture during the warm intervals compared to the cold intervals. There is also a marked west-east difference in temperature seasonality, with warmer intervals showing increased seasonality in the western and northwestern region compared to the eastern Mediterranean. The increased seasonality is largely driven by changes in summer temperature since the degree of winter warming during warm intervals is similar across the whole region. Changes in all of the bioclimatic variables between cold and warm intervals show a strong relationship with latitude: the latitudinal gradient is steeper in cold climates than in warm climates. The relative homogeneity of changes during the cold intervals is consistent with a more zonal circulation pattern than during warm intervals. This change in circulation patterns could help to explain the west-east patterns in the changes in moisture between cold and warm intervals.&lt;/p&gt;

‘Metamyth Therapy through the Arts in Museums'©

Abstract: This chapter presents a story about a dramatherapist, Thalia, who liked museums from a young age. Later when she became an actress and a dramatherapist she created a psychological method ‘Metamyth’. ‘Metamyth’© brings focus and quality of attention to self, others, and the cultural context of museums. ‘Metamyth’© is both a therapy and an art form and has a poetic basis which contributes to the thinking and practice of therapy. ‘Metamyth Therapy through the Arts in the Museums’© is a branch of ‘Metamyth’© that has a cultural, artistic, and psychosocial aspect which links to history and aesthetics, philosophy and the arts, including museums, galleries, music, and culture. In a ‘Metamyth in Museums’© session firstly comes the plot, that is the way the therapist/director conceptualises, dreams, and plans the work. The purpose of ‘Metamyth’© for the museum practitioner is to guide or facilitate the subject, who trusts the practitioner to hold the process with the group, who witness as a Chorus.

Left Ventricle Contouring of Apical Three-Chamber Views on 2D Echocardiography

Abstract: Abstract We propose a new method to automatically contour the left ventricle on 2D echocardiographic images. Unlike most existing segmentation methods, which are based on predicting segmentation masks, we focus at predicting the endocardial contour and the key landmark points within this contour (basal points and apex). This provides a representation that is closer to how experts perform manual annotations and hence produce results that are physiologically more plausible. Our proposed method uses a two-headed network based on the U-Net architecture. One head predicts the 7 contour points, and the other head predicts a distance map to the contour. This approach was compared to the U-Net and to a point based approach, achieving performance gains of up to 22% in terms of landmark localisation ( $${<}4.5$$ < 4.5 mm) and distance to the ground truth contour ( $${<}3.0$$ < 3.0 mm).

Use of a Single Radial Incision to Improve Curvature Matching and Graft Adhesion in Descemet Membrane Endothelial Keratoplasty in a Patient With Keratoconus

Abstract: The purpose of this study was to report a novel surgical technique for altering donor Descemet membrane endothelial keratoplasty (DMEK) curvature to match host posterior stroma in a patient with advanced keratoconus (KC) and endothelial decompensation.We report a 56-year-old man with Fuch endothelial dystrophy and KC, who underwent DMEK due to endothelial decompensation. A triangular area of graft detachment centered on the apex of cones persisted after repeat gas tamponade. A radial incision from the graft edge to the apex was used to allow overlapping of the graft, thereby increasing the grafts curvature.The use of a radial incision in the Descemet membrane (DM) graft was made to allow the graft overlap and adapt to the new shape. By matching the donor curvature to that of the hosts posterior curvature, full adhesion of the graft was achieved with the use of a short-acting air bubble by 1 week after the procedure.The mismatch in the curvature of the DM graft and the host posterior corneal surface, in cases with KC or very steep corneas, should be taken into consideration because it can lead to redundancy folds. These can result in atypical, conical detachments, distinct from the typical peripheral detachments seem commonly in DMEK. A single radial incision in the DM graft combined with air tamponade is a feasible treatment option in cases where DMEK fails to attach because of apparent curvature mismatch between the donor and host.

Multimodal body, multimodal mind, multimodal communication

Abstract: This chapter reviews prospects for improving the scientific study of communication by developing big data infrastructure and computational, technical, and statistical tools. Such big data systems are typically free of the methodological threats to validity and underpowered datasets common in lab experiments.

Differences in the Surgical Outcomes of Glaucoma Surgery in Patients of African Caribbean Descent

Abstract: People of African Caribbean Descent (ACD) have a higher prevalence of glaucoma compared to people of European Descent (ED) and there is uncertainty if treatment outcomes are equivalent between the two groups. To assess surgical failure rates comparing ACD with ED focusing on trabeculectomy, aqueous shunt implantation, non-penetrating filtering surgery (NPFS), and minimally invasive glaucoma surgery (MIGS) by performing a systematic review in accordance with the PRISMA guidelines and to determine whether there is any evidence in to show a difference in success rates based on race.A systematic review of articles using the CENTRAL, Ovid MEDLINE, PubMed, EMBASE, and ClinicalTrials.gov databases was completed. Additional studies were identified by contacting clinical experts and searching bibliographies. All retrospective and prospective studies on trabeculectomy, aqueous shunt implantation, NPFS, and MIGS that included at least 20% ACD were included. Two review authors independently screened search results for eligibility and inclusion and extracted the data using pre-determined fields.A total of 76 studies were identified for inclusion in the review. Glaucoma surgical outcomes in ACD appear to be poorer compared to ED overall, particularly for trabeculectomy. Data on NPFS are limited, but the studies completed thus far demonstrate surprisingly good results for ACD, particularly when compared to ED, who have significantly lower pre-operative IOPs. Evidence from studies investigating aqueous shunts does not suggest that ACD have poorer outcomes than ED. There is not enough data on MIGS to provide a significant conclusion.In a population where trabeculectomy may no longer be the gold standard, sufficiently powered studies assessing surgical outcomes in aqueous shunts, NPFS, and MIGS are needed to guide clinicians.

Extracorporeal Blood Purification Is Appropriate in Critically Ill Patients with COVID-19 and Multiorgan Failure: COMMENTARY

Abstract: This is an Early Access article. Please select the PDF button, above, to view it. Be sure to also read the PRO: 10.34067/KID.0006632020 and the CON: 10.34067/KID.0007382020

Diagnostic elimination diets

Abstract: A diagnostic elimination diet is the process of eliminating, then reintroducing, different food/s, for a defined period of time, to help identify the presence of food allergies, intolerances or sensitivities. Diagnostic elimination diets are often combined with allergy testing to fill in diagnostic gaps. During this chapter we review the diagnostic elimination diet pathway, consider situations in allergy where a diagnostic elimination diet may be indicated, and practical strategies for undertaking them.

Media Coverage of Sports Fans

Abstract: News framing is a routine journalism practice. From business to entertainment to sports, media coverage is filled with journalists’ attempts to organize information in a way that will help people understand and evaluate an issue or event. News framing constructs specific views of the world, helping individuals to evaluate and interpret messages found in news. Framing is grounded in media studies surrounding political messages but the ubiquity of news framing has spread across the communication research field. This chapter explores the rich opportunities to use framing theory and analysis to understand the intersection of news framing and sports fandom. Questions persist in framing effects research, such as whether frames activate emotional reactions that mediate cognitive processes of framing effects and whether there are limits of framing effects and what factors impose those limits. This article lays out how these questions and others might be further applied in context of the world of sports.