Publications by authors named "Gatrell A"

Article Synopsis
  • Doppler ultrasound (DU) is used to detect venous gas emboli (VGE) after diving, but existing automated methods for assessment have limitations due to small datasets and lack of objective evaluation.
  • The authors developed a method to create synthetic DU data based on real signals, allowing variability in bubbling to match established grading systems.
  • This work includes baseline recordings and code for synthetic data generation, aiming to advance research in VGE analysis and improve signal processing methodologies.
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Objective: Doppler ultrasound (DU) is used to detect venous gas emboli (VGE) post dive as a marker of decompression stress for diving physiology research as well as new decompression procedure validation to minimize decompression sickness risk. In this article, we propose the first deep learning model for VGE grading in DU audio recordings.

Methods: A database of real-world data was assembled and labeled for the purpose of developing the algorithm, totaling 274 recordings comprising both subclavian and precordial measurements.

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Article Synopsis
  • Rebreathers are devices that allow divers to recycle exhaled gas, helping them stay underwater longer with less equipment, but they can fail, leading to dangerous conditions like hypoxia.
  • This study aimed to see if pulse oximeters could give divers advance warning of low oxygen levels when the oxygen system in rebreathers fails.
  • Results showed that pulse oximeters placed on the forehead and nasal ala provided about 32 seconds of warning before the risk of unconsciousness, suggesting they could serve as a useful safety feature for divers using rebreathers.
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Objective: Little is known about caregiver attitudes and perceptions towards snacking by toddlers and preschool children outside of the U.S. This qualitative study examined caregiver attitudes and perceptions towards the provision of both foods and beverages in-between meals, along with what constitutes a snack, or snacking occasion, amongst Swiss caregivers.

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There is now an extensive literature on therapeutic landscapes, those settings and places that can contribute to wellbeing and good health. Less attention has been paid to the therapeutic qualities of the act of moving from one place to another. The recent emergence of a significant mobilities 'turn' in social science is welcome, but this has as yet had relatively little to say about the consequences of mobility for health and wellbeing.

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We seek to map and describe variation in geographic access to the set of 189 specialist adult inpatient hospices in England and Wales. Using almost 35,000 small Census areas (Local Super Output Areas: LSOAs) as our units of analysis, the locations of hospices, and estimated drive times from LSOAs to hospices we construct an accessibility 'score' for each LSOA, for England and Wales as a whole. Data on cancer mortality are used as a proxy for the 'demand' for hospice care and we then identify that subset of small areas in which accessibility (service supply) is relatively poor yet the potential 'demand' for hospice services is above average.

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To date, solicited diaries have been relatively neglected as a social science research method. This is particularly true within the field of health research. Yet, these narrative approaches can provide invaluable insights into the health behaviours of individuals and how these are played out across time and space.

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The interest of social scientists in complexity theory has developed rapidly in recent years. Here, I consider briefly the primary characteristics of complexity theory, with particular emphasis given to relations and networks, non-linearity, emergence, and hybrids. I assess the 'added value' compared with other, existing perspectives that emphasise relationality and connectedness.

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There is a growing debate about the question of equity of access to hospice and palliative care services. Even countries with relatively well developed palliative care systems are considered to have problems of access and inequity of provision. Despite these concerns, we still lack a relevant evidence base to serve as a guide to action.

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Considerable research effort has been devoted to describing and explaining, at a variety of spatial scales, geographical inequalities in health outcomes within the developed world. Following Bourdieu, we argue that structures of the social world may be revealed in different kinds of 'social' space. We outline the relational thinking that underlies these ideas.

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While gardening is seen, essentially, as a leisure activity it has also been suggested that the cultivation of a garden plot offers a simple way of harnessing the healing power of nature (The therapeutic garden, Bantam Press, London, 2000). One implication of this is that gardens and gardening activity may offer a key site of comfort and a vital opportunity for an individual's emotional, physical and spiritual renewal. Understanding the extent to which this supposition may be grounded in evidence underpins this paper.

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This paper seeks to contribute to the limited body of work that has directly explored lay understandings of the causes of health inequalities. Using both quantitative and qualitative methodology, the views of people living in contrasting socio-economic neighbourhoods are compared. The findings support previous research in suggesting that lay theories about causality in relation to health inequalities, like lay concepts of health and illness in general, are multi-factorial.

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This paper explores the links between lay knowledge, place and health related social action (or agency) at the individual and collective level. It is based on an analysis of in-depth interviews and neighbourhood survey data across four localities in two cities in the North West of England.The qualitative analysis has identified 'guidelines' that we argue provide socially shared understandings of the normative contours of 'proper places' which shape the way people respond to the everyday lived reality of places.

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Previous evidence for spatial clustering of amyotrophic lateral sclerosis is inconclusive. Studies that have identified apparent clusters have often been based on a small number of cases, which means the results may have occurred by chance processes. Also, most studies have used the geographic location at the time of death as the basis for cluster detection, rather than exploring clusters at other points in the life cycle.

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Background: Relatively little work of a detailed geographical nature has been undertaken on the distribution of place of death. In particular, given evidence that most cancer patients would prefer to die at home there is a need to examine the extent to which this preference is met differentially from place to place.

Methods: Using data on cancer deaths for a single Health Authority in North West England we conducted both small area and individual analyses of place of death, using binomial and binary logistic regression models, respectively.

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Objective: To determine if parental socio-demographic characteristics are associated with dental knowledge and attitude.

Design: A questionnaire survey of 500 consecutive parents with children aged approximately 8-months, attending clinics in 1999/2000, in Burnley, Pendle and Rossendale, for health visitor distraction-hearing tests.

Outcome Measures: Scores were obtained for dental knowledge and attitudes.

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Objectives: To explore the impact of a community neonatal service on high risk infant survivors in the first year of life.

Design: Retrospective multicentre survey. Postal questionnaires were sent to selected parents.

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We assess the extent to which the need for tertiary cardiac care is being met uniformly within two Health Authorities in North-West England. We analyse small-area data from 1993-1996 on standardised rates of investigation (angiography) and surgery (bypass grafts and angioplasty). Utilisation by electoral ward is shown to be related to material deprivation.

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The objective of this study is to explore the effect of lifestyle on the risk of invasive breast carcinoma in women aged 50-65 years. A case-control study using a questionnaire and a semi-structured interview. Cases (n = 67) and controls (n = 134) were closely matched on known risk factors for breast cancer including age, family history, age at menarche, parity, age at first birth and menopausal status.

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Objective: To study the possible changes, between 1986 and 1995, in the mortality due to amyotrophic lateral sclerosis (ALS) among Finnish patients.

Materials And Methods: A total of 1000 deaths from ALS were extracted from the Finnish Death Certificate Register for the study years. General population data were obtained from the Statistical Yearbooks of Finland.

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A previous study showed that variations in deprivation within small localities in England and Wales influenced the rates of self-reported limiting long-term illness, controlling for overall levels of deprivation. These results suggest that while morbidity is related to overall levels of material deprivation, the distribution of resources within small areas have a significant effect on health outcomes. However, it is possible that these area effects become redundant once individual-level characteristics are accounted for.

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This paper addresses the issues surrounding an individual's exposure to potential environmental risk factors, which can be implicated in the aetiology of a disease. We hope to further elucidate the 'lag' or latency period between the initial exposure to potential pathogens and the physical emergence of the disease, with specific reference to the rare neurological condition, motor neurone disease (MND), using a dataset obtained from the Finnish Death Certificate registry, for MND deaths between the period 1985-1995. A space-time approach is adopted, whereby patterns in both time and space are considered.

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This study investigates variations in survival following surgery for colo-rectal cancer in the Wessex region (part of southern England), using 5147 cases diagnosed between 1 September 1991 and 31 August 1995. Survival curve estimation by life tables and Cox's proportional hazards model were used to examine geographical variation in cancer survival, with a specific focus on distance between place of residence and treatment centre, and district of treatment. We also consider whether area deprivation has an impact on survival.

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We seek to determine whether variability in deprivation at small area level, and population stability, influence standardised morbidity ratios in England and Wales. A regression analysis was conducted with data from the 1991 British Census, in order to explain variation in morbidity. Both an area deprivation score (for electoral wards) and the within-area variability of deprivation scores were examined as possible determinants of morbidity (self-reported, limiting, long-term illness).

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