Studies examining the pathophysiology of acid-induced distal oesophageal squamous mucosal damage

• Gastro-oesophageal reflux disease (GORD) is the commonest chronic disease in Western countries. Symptomatic GORD is the strongest risk factor for the development of oesophageal adenocarcinoma with obesity and male sex also linked to the development of neoplasia at this site. Recent decades have seen a significant increase in the incidence of this highly lethal cancer among Western populations with Scotland having the highest recorded incidence worldwide. • Human saliva has a high nitrite content derived from the entero-salivary recirculation of nitrate in our diet which has resulted from the increased use of nitrogenous fertilisers over the past 50-60 years. • The luminal chemistry produced at the gastro-oesophageal junction (GOJ) when swallowed salivary nitrite reacts with gastric acid, and most notably the production of nitric oxide (NO), may explain most of the physiological abnormalities that contribute to the pathogenesis of GORD. NO has been shown to reduce lower oesophageal sphincter (LOS) pressure, impair oesophageal clearance, delay gastric emptying and may be the final mediator of transient lower oesophageal sphincter relaxations (TLOSRs). Previous studies to investigate the role of this luminal chemistry in the pathogenesis of GORD show conflicting results. • In addition to the distal oesophageal acidification produced by traditional trans-sphincteric reflux, previous studies suggest ‘splaying open’ of the distal lower oesophageal sphincter following a meal may expose the gastric cardia and the most distal oesophageal squamous mucosa to the noxious effects of gastric acid. • Although the gastric cardia is an important site of pathology in the upper gastrointestinal tract, it is a complex and poorly understood area. It has been proposed, from autopsy studies, that cardia mucosa itself may be pathological and in fact an ‘acquired cardia’ due to metaplasia of the most distal oesophageal squamous mucosa. • A series of studies were designed to examine the effect of salivary nitrite on post-prandial GORD, gastro-oesophageal function and GOJ morphology in 20 healthy, asymptomatic adult volunteers using high-resolution pH manometry, an isotope gastric emptying breath testing and X-ray localisation of the squamo-columnar junction (SCJ). • Despite an excellent range of salivary nitrite concentrations extending over and above the normal physiological range no effect of salivary nitrite on gastro-oesophageal reflux, function or morphology was demonstrated. However, the studies did confirm, for the first time using high-resolution manometry, that distal opening of the LOS occurs after a meal. • The relationship of age and obesity to the SCJ position relative to the proximal border of the gastro-oesophageal high pressure zone (HPZ) was examined in 15 Helicobacter Pylori negative healthy volunteers. Strong negative correlations were seen between SCJ position relative to the proximal HPZ and increasing age, body mass index (BMI) and waist circumference (WC) respectively. These correlations were stronger in the male sub-group. • In 25 healthy volunteers, parietal cell density was measured from endoscopic biopsies taken from the macroscopic SCJ, 1cm distal to the SCJ, the gastric body and the gastric antrum. Again, a strong negative correlation was seen between increasing age and parietal cell density at the SCJ. This effect was localised to the SCJ and not seen at the other biopsy sites. • Our findings suggest that salivary nitrite does not alter gastro-oesophageal function, the integrity of the gastro-oesophageal barrier or gastro-oesophageal reflux in healthy volunteers. They confirm distal opening of the LOS after meals. The strong negative correlations between age and both SCJ position relative to the proximal HPZ and parietal cell density support the hypothesis of an ‘acquired’ cardia. The development of cardia mucosa may also be linked to obesity, visceral obesity and male sex. • Future work could examine the carcinogenic effect of salivary nitrite and its luminal chemistry but this would require large scale epidemiological research. Further, larger clinical studies are needed to investigate the role of distal opening of the LOS after meals and to improve our understanding of the gastric cardia. Such studies should focus on the role of obesity and posture

The introduction of advanced paramedics into primary care in Northern Ireland: a qualitative descriptive study of the experiences of general practitioners

Primary care is dealing with an ever-increasing workload. The causes are multi-factorial but include a decreasing number of General Practitioners (GPs), combined with increased numbers of patients with multiple co-morbidities and an ageing population. As a result of these pressures, nursing and allied health professionals are now working within a growing number of advanced practice roles delivering community-based care. One such example is paramedics taking up advanced roles within General Practice settings in Northern Ireland. What is not known, however, is what GPs' experiences are of these developments. Abstract published with permission

Living a burdensome and demanding life: a qualitative systematic review of the patients experiences of peripheral arterial disease

<div><p>Background</p><p>Peripheral arterial disease (PAD) has a significant negative impact on the quality of life of individuals. Understanding the experiences of people living with PAD will be useful in developing comprehensive patient-centred secondary prevention therapies for this population.</p><p>Aim</p><p>The aim of this study is to identify first-hand accounts of patients’ experiences of living with PAD.</p><p>Methods</p><p>Six databases (CINALH, PsyclNFO, MEDLINE, AMED, EMBASE, Social citation index/Science citation index via Web of Science (WOS)) and reference lists of identified studies were searched until September 2017 (updated February 2018). Qualitative studies reporting patients’ account of living with PAD were eligible for inclusion. A framework thematic synthesis was implemented.</p><p>Results</p><p>Fourteen studies with 360 participants were included. Pain and walking limitation were recurrent among the varied symptom descriptions. Patients’ ignorance and trivialisation of symptoms contributed to delays in diagnosis. Inadequate engagement in disease understanding and treatment decisions meant patients had poor attitudes towards walking treatments and unrealistic expectations about surgery. Depending on symptom progression, patients battle with walking impairment, powerlessness, and loss of independence which were a source of burden to them. Lack of disease understanding is central through patients’ journey with PAD and, although they subsequently began adaptation to long term living with PAD, many worried about their future.</p><p>Conclusions</p><p>Disease understanding is vital across the illness trajectory in patients with PAD. Although certain experiences are common throughout patient journey, some might be unique to a particular stage (e.g. unrealistic expectation about surgery, or rationale of walking in spite of pain in a supervised exercise program). Given that PAD is an overarching construct ranging from the mildest form of intermittent claudication to severe critical limb ischemia with ulceration and gangrene, consideration of important patient constructs specific to each stage of the disease may enhance treatment success. Systematic review registration CRD42017070417.</p></div

Credibility, accuracy, and comprehensiveness of readily available internet-based information on treatment and management of peripheral artery disease and intermittent claudication: review

BACKGROUND: Peripheral artery disease (PAD) affects millions of people worldwide, and a core component of management of the condition is self-management. The internet is an important source of health information for many people. However, the content of websites regarding treatment recommendations for PAD has not been fully evaluated. OBJECTIVE: This study aimed to assess the credibility, accuracy, and comprehensiveness of websites found via a common search engine, by comparing the content to current guidelines for treatment and management of PAD and intermittent claudication (IC). METHODS: A review of websites from hospitals, universities, governments, consumer organizations, and professional associations in the United States and the United Kingdom was conducted. Website recommendations for the treatment of PAD and IC were coded in accordance with the guidelines of the National Institute for Health and Care Excellence (NICE) and the American Heart Association (AHA). Primary outcomes were website credibility (4-item Journal of the American Medical Association benchmark), website accuracy (in terms of the percentage of accurate recommendations), and comprehensiveness of website recommendations (in terms of the percentage of guideline recommendations that were appropriately covered). Secondary outcomes were readability (Flesch–Kincaid grade level) and website quality (Health On the Net Foundation’s code of conduct). RESULTS: After screening, 62 websites were included in this analysis. Only 45% (28/62) of websites met the credibility requirement by stating they were updated after the NICE guidelines were published. Declaration of authorship and funding and the presence of reference lists were less commonly reported. Regarding accuracy, 81% (556/685) of website recommendations were deemed accurate on following NICE’s and the AHA’s recommendations. Comprehensiveness was low, with an average of 40% (25/62) of guideline treatment recommendations being appropriately covered by websites. In most cases, readability scores revealed that the websites were too complex for web-based consumer health information. CONCLUSIONS: Web-based information from reputable sources about the treatment and management of PAD and IC are generally accurate but have low comprehensiveness, credibility, and readability

Barriers and enablers to walking in individuals with intermittent claudication: a systematic review to conceptualize a relevant and patient-centered program

Background: Walking limitation in patients with peripheral arterial disease (PAD) and intermittent claudication (IC) contributes to poorer disease outcomes. Identifying and examining barriers to walking may be an important step in developing a comprehensive patient-centered self-management intervention to promote walking in this population. Aim: To systematically review the literature regarding barriers and enablers to walking exercise in individuals with IC. Methods: A systematic review was conducted utilizing integrative review methodology. Five electronic databases and the reference lists of relevant studies were searched. Findings were categorized into personal, walking activity related, and environmental barriers and enablers using a social cognitive framework. Results: Eighteen studies including quantitative (n = 12), qualitative (n = 5), and mixed method (n = 1) designs, and reporting data from a total of 4376 patients with IC, were included in the review. The most frequently reported barriers to engaging in walking were comorbid health concerns, walking induced pain, lack of knowledge (e.g. about the disease pathology and walking recommendations), and poor walking capacity. The most frequently reported enablers were cognitive coping strategies, good support systems, and receiving specific instructions to walk. Findings suggest additionally that wider behavioral and environmental obstacles should be addressed in a patient-centered self-management intervention. Conclusions: This review has identified multidimensional factors influencing walking in patients with IC. Within the social cognitive framework, these factors fall within patient level factors (e.g. comorbid health concerns), walking related factors (e.g. claudication pain), and environmental factors (e.g. support systems). These factors are worth considering when developing self-management interventions to increase walking in patients with IC. Systematic review registration CRD42018070418

Experiences and psychological distress of fertility treatment and employment

Purpose: This study examined experiences and psychological distress about fertility treatment in people combining work and treatment. Methods: 563 participants in the UK completed an online survey asking about difficulties in combining work and treatment; workplace disclosure, support, absence and policy; and psychological distress about treatment. Results: Absence from work and perceptions that treatment has an impact on work and career prospects were reported by the majority of participants and this was related to the psychological distress of treatment. Around three quarters of participants disclosed to their employer and colleagues. The key reason for disclosure was needing to ask for absence from work and the main reason for non-disclosure was privacy. Workplace policy relating to managing fertility treatment and support from colleagues and their employer was related to reduced psychological distress but workplace policy was reported by less than one quarter of participants. Conclusions: Difficulties experienced in combining work and treatment suggest that support is needed. Specific workplace policy, guidance for supervisors and flexibility in fertility clinic times should help support employees during treatment and reduce psychological distress, thereby potentially influencing physical health and treatment outcomes