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The inter-relationship between marginal vitamin D deficiency and muscle.
No full textPURPOSE OF REVIEW
We review the recent literature on the interplay between mild vitamin D deficiency and skeletal muscle strength and performance.
RECENT FINDINGS
Preclinical studies indicate that vitamin D is important in muscle proliferation, differentiation and mitochondrial function, whereas some epidemiological studies demonstrate associations with muscle strength and low physical performance. Recent studies have implicated vitamin D deficiency development of frailty and sarcopenia in the older population. Some small studies have assessed its impact on muscle function in special circumstances such as elite sport and critical illness. Advances in liquid chromatography/mass spectrometry technologies have allowed the inter-relationships between the vitamin D metabolome and muscle phenotype to be characterized. There is evidence of distinct effects on human skeletal muscle gene expression between vitamin D metabolites.
SUMMARY
Large-scale clinical trials with well defined cohorts and outcomes are needed to provide clinically meaningful insights into this area. Care should be taken to stratify participants by vitamin D status at baseline and over follow-up in addition to observing a range of measures of muscle function
Towards viscoelastic characterisation of the human ulnar nerve: An early assessment using embalmed cadavers.
No full textCubital tunnel syndrome is the most prevalent neuropathy of the ulnar nerve and its aetiology is controversial. Potential replacement materials should display similar viscoelastic properties. The purpose of this study was to assess the feasibility and merit of quantifying the frequency-dependent viscoelastic properties of proximal and distal sections of the human ulnar nerve. Four ulnar nerves (n = 4) were dissected from the elbows of human cadavers and sectioned at the level of the cubital tunnel into proximal and distal sections. These eight sections of the ulnar nerve were sinusoidally loaded to induce stresses between 0.05 and 0.27 MPa and the viscoelastic properties were measured between 0.5 and 24 Hz using dynamic mechanical analysis. The nerves were found to exhibit frequency-dependent viscoelastic behaviour throughout this frequency range. The median storage moduli of the proximal nerves ranged between 7.03 and 8.18 MPa, and 8.85-10.19 MPa for distal nerves, over the frequency-sweep tested. The median loss moduli of the proximal nerves ranged between 0.46 and 0.81 MPa and between 0.51 and 0.80 MPa for distal nerves. Ulnar nerves display frequency dependency viscoelasticity. Such characterisation is feasible with potential applications to suitable nerve grafts
Under-utilisation of reproducible, child appropriate or patient reported outcome measures in childhood uveitis interventional research.
No full textBACKGROUND
Childhood uveitis is a collection of chronic rare inflammatory eye disorders which result in visual loss in at least one eye of one fifth of affected children. Despite the introduction of novel systemic immunochemotherapies, it remains a blinding disease. We have undertaken a systematic review of outcome measures used in interventional trials of children with, or at risk of uveitis, in order to investigate metric quality and heterogeneity, as possible barriers to the translation of clinical research into improved outcomes.
METHODS
Systematic review of trials registered within databases approved by the International Committee of Medical Journal Editors (ICMJE). Eligible trials for were those which involved participants aged under 18 years with or at risk of non-infectious uveitis. Data on date of study commencement, uveitis site, inclusion age criteria, and outcome measure characteristics including type, dimension and quality were extracted independently by two authors. Quality was determined using the reproducibility, validity and age-appropriateness of the metric.
RESULTS
Of 917 identified trials, 57 were eligible for inclusion. Twenty different domains across five dimensions were used as primary outcome measures. The structure most commonly used was multiple separate outcome measures. In a quarter of studies, outcomes were assessed less than 3 months following the intervention. Disease activity was the most commonly assessed dimension, with only 30 studies (60%) using reproducible methodologies to assess activity. Only 2/12 (18%) studies on intermediate or posterior uveitis used reproducible activity grading schemes. Of 18 studies involving children aged under 6 years old which used outcome measures related to visual function, only 8/18 (44%) described the use of age-appropriate acuity assessment measures. None of the studies used a vision related quality of life metrics which had been validated for use in childhood.
CONCLUSION
This review of outcome measures in childhood uveitis interventional trials has identified under-utilisation of reproducible or child appropriate measures, and considerable heterogeneity in metric type, and structure. Clinicians and researchers interested in improving outcomes for affected children must identify a patient and family centred core outcome set, and work to validate both objective and patient (or proxy) reported disease age appropriate outcome measures
Negative Pressure Wound Therapy Instillation for Management of Intrathoracic Chronic Infection.
No full text
Finger-Prick Autologous Blood in the Treatment of Persistent Corneal Epithelial Defects.
No full textPURPOSE
Autologous hemoderivative eye drops have a role in the management of persistent epithelial defects (PEDs), but their use may be limited by cost and availability. Finger-prick autologous blood (FAB) treatment uses whole capillary blood, obtained from a sterilized fingertip, as an alternative form of hemoderivative eye drop therapy. To date, 1 report has described the safe and effective use of FAB for dry eye and PEDs. We report the results of 10 eyes (10 patients) treated with FAB for PEDs.
METHODS
Ten patients with PEDs in 1 eye for a mean of 259 ± 201 days due to diabetic neurotrophic keratopathy (n = 3), herpetic keratitis (n = 3), postpenetrating keratoplasty (n = 1), keratoconjunctivitis sicca (n = 1), postradiotherapy (n = 1), and neuropathic ulcer (n = 1) were treated with FAB 4 times a day for 28 days in addition to conventional therapies. All patients had been unsuccessfully treated with conventional therapy before commencing on FAB. None of the patients had received any surgical treatment for PED.
RESULTS
At day 28, the PED had healed in 60% (n = 6) of the eyes. In 1 eye, the PED reduced in size by half. Thirty percent (n = 3) of patients had incomplete follow-up data at the end of the study.
CONCLUSIONS
FAB in combination with conventional treatment may be successfully used in the management of refractory PEDs. No adverse effects arising from FAB treatment were observed
Reflection in practice: How can patient experience feedback trigger staff reflection in hospital acute care settings?
No full textBACKGROUND
Patient and staff experiences provide important insights into care quality, but health systems have difficulty using these data to improve care. Little attention has been paid to understanding how patient experience feedback can act as a prompt to reflection in practice in the clinical setting.
OBJECTIVE
We aimed to identify the ways in which different types of patient experience feedback act as a trigger or prompt for engagement in reflection in clinical practice in acute hospital settings and identify important considerations for enhancing the value of patient experience data for reflective learning.
METHODS
We conducted an ethnographic study in eight acute care units in three NHS hospital trusts in England, including 140 hours of observations and 45 semi-structured interviews with nursing, medical and managerial staff working in acute medical units and intensive care units. The data were analysed thematically.
FINDINGS
We distinguished between formal patient experience data sources: data purposively collected and collated to capture the patient experience of care, generally at organizational level, including surveys, complaints and comments; and informal sources of feedback on the patient experience recognized by staff alongside the formal data. We also identified patient narratives as an 'in between' source of data. The impact of different types of patient feedback in triggering reflection primarily depended on the extent to which the feedback was experienced as personally relevant, meaningful and emotionally salient.
DISCUSSION
Patient experience feedback is multi-faceted, but our study suggests that all types of feedback could be harnessed more effectively to prompt reflection
United Kingdom Diabetic Retinopathy Electronic Medical Record (UK DR EMR) Users Group: report 4, real-world data on the impact of deprivation on the presentation of diabetic eye disease at hospital services.
No full textAIM
To assess the impact of deprivation on diabetic retinopathy presentation and related treatment interventions, as observed within the UK hospital eye service.
METHODS
This is a multicentre, national diabetic retinopathy database study with anonymised data extraction across 22 centres from an electronic medical record system. The following were the inclusion criteria: all patients with diabetes and a recorded, structured diabetic retinopathy grade. The minimum data set included, for baseline, age and Index of Multiple Deprivation, based on residential postcode; and for all time points, visual acuity, ETDRS grading of retinopathy and maculopathy, and interventions (laser, intravitreal therapies and surgery). The main outcome measures were (1) visual acuity and binocular visual state, and (2) presence of sight-threatening complications and need for early treatment.
RESULTS
79 775 patients met the inclusion criteria. Deprivation was associated with later presentation in patients with diabetic eye disease: the OR of being sight-impaired at entry into the hospital eye service (defined as 6/18 to better than 3/60 in the better seeing eye) was 1.29 (95% CI 1.20 to 1.39) for the most deprived decile vs 0.77 (95% CI 0.70 to 0.86) for the least deprived decile; the OR for being severely sight-impaired (3/60 or worse in the better seeing eye) was 1.17 (95% CI 0.90 to 1.55) for the most deprived decile vs 0.88 (95% CI 0.61 to 1.27) for the least deprived decile (reference=fifth decile in all cases). There is also variation in sight-threatening complications at presentation and treatment undertaken: the least deprived deciles had lower chance of having a tractional retinal detachment (OR=0.48 and 0.58 for deciles 9 and 10, 95% CI 0.24 to 0.90 and 0.29 to 1.09, respectively); in terms of accessing treatment, the rate of having a vitrectomy was lowest in the most deprived cohort (OR=0.34, 95% CI 0.19 to 0.58).
CONCLUSIONS
This large real-world study suggests that first presentation at a hospital eye clinic with visual loss or sight-threatening diabetic eye disease is associated with deprivation. These initial hospital visits represent the first opportunities to receive treatment and to formally engage with support services. Such patients are more likely to be sight-impaired or severely sight-impaired at presentation, and may need additional resources to engage with the hospital eye services over complex treatment schedules
Evaluation of Response to Stereotactic Radiosurgery in Brain Metastases Using Multiparametric Magnetic Resonance Imaging and a Review of the Literature.
No full textAIMS
Following stereotactic radiosurgery (SRS), brain metastases initially increase in size in up to a third of cases, suggesting treatment failure. Current imaging using structural magnetic resonance imaging (MRI) cannot differentiate between tumour recurrence and SRS-induced changes, creating difficulties with patient management. Combining multiparametric MRI techniques, which assess tissue physiological and metabolic information, has shown promise in answering this clinical question.
MATERIALS AND METHODS
Multiparametric MRI techniques, including spectroscopy, diffusion and perfusion imaging, were used for the differentiation of radiation-related changes and tumour recurrence after SRS for intracranial metastases in six cases. All patients presented with enlargement of the treated lesion, an increase in perilesional brain oedema and aggravation or appearance of neurological signs and symptoms from 7 to 29 weeks after primary treatment.
RESULTS
Multiparametric imaging helped to differentiate features of tumour progression (n = 4) from radiation-related changes (n = 2). A low apparent diffusion coefficient (ADC) 2.1, high choline:creatine (Cho:Cr) ratio > 1.8 suggested tumour recurrence. A high ADC > 1000 × 10 mm/s, low rCBV ratio < 2.1, Cho:Cr ratio < 1.8 suggested SRS-induced radiation changes. Multiparametric MRI diagnosis was confirmed by histology or radiological and clinical follow-up.
CONCLUSION
Multiparametric MRI was helpful in the early identification of radiation-related changes and tumour recurrence and may be useful for monitoring treatment changes in intracranial neoplasms after SRS treatment