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Neonatology 2015The fetal-to-neonatal transition is a complex process that includes changes in cardiac and respiratory systems. (Review)
Review
BACKGROUND
The fetal-to-neonatal transition is a complex process that includes changes in cardiac and respiratory systems.
OBJECTIVE
The aim of this study is to review the different methods of cardiocirculatory monitoring during the immediate neonatal transition period.
METHODS
A systematic search of PubMed and Ovid Embase was performed using the following terms: infant, newborn, newborn infant, neonate, neonates, heart, cardiac, blood pressure, haemodynamic, hemodynamics, blood circulation, circulation, echocardiography, ultrasonography, sonography, electrocardiography, ECG, oximetry, pulse, pulse oximetry, monitoring, measurement, acclimatization, adaptation, transition, after birth and delivery room. Additional articles were identified by manual search of cited references. Only human studies describing cardiocirculatory monitoring during the first 15 min after birth were included.
RESULTS
Thirteen studies were identified that described heart rate (HR). Additional five studies were identified that measured blood pressure. Four studies performed functional echocardiography during neonatal transition; two in addition to blood pressure monitoring and three in addition to HR monitoring.
CONCLUSION
Routine HR monitoring using electrocardiography or pulse oximetry is used to evaluate adequate hemodynamic transition, and reference ranges have been established. Measuring blood pressure noninvasively though noncontinuously might be of some value in future, considering that the normative data have been established recently. Echocardiographic monitoring during the immediate transition period will improve the knowledge about cardiac function changes, but introduction in clinical routine remains questionable.
Topics: Blood Pressure; Echocardiography; Electrocardiography; Female; Heart Function Tests; Heart Rate; Hemodynamics; Humans; Infant, Newborn; Male; Monitoring, Physiologic; Neonatology; Oximetry; Parturition
PubMed: 25412794
DOI: 10.1159/000368042 -
Journal of Sports Science & Medicine Jun 2019The aim of this meta-analysis was to evaluate the effectiveness of heat acclimatization (HA) on time trial (TT) performance, maximum oxygen uptake (VO), exercise heart... (Meta-Analysis)
Meta-Analysis
The aim of this meta-analysis was to evaluate the effectiveness of heat acclimatization (HA) on time trial (TT) performance, maximum oxygen uptake (VO), exercise heart rate (HR), time trials heart rate (HR), maximal heart rate (HR), core temperature (T), mean skin temperature (T), thermal comfort (T), plasma volume (PV), blood lactate concentration and rate of perceived exertion (RPE). Cochrane-CENTRAL, EMBASE, CINAHL and PubMed databases and reference lists of included studies were searched for randomized controlled trials that investigated the efficacy of HA in athletes. Data were then extracted from the entered studies for analyses. A total of 11 randomised controlled trials (215 participants; mean age, 26.09 years; 91% men) were included after screening of 508 titles and abstracts and 19 full-text articles. The pooled standard mean difference (SMD) between the HA and non-HA groups were 0.50 (95% CI: 0.03 to 0.97, p = 0.04) for TT performance and 1 (95% CI: 1 to 2, p = 0.007) for HR. The pooled mean difference (MD) between the HA and non-HA groups were -7 (95% CI: -13 to -1, p = 0.03) for HR. The changes in T and RPE were too small to be meaningful. There were no significant differences between the HA and non-HA groups for VO, HR, T, T, PV and blood lactate concentration (all p > 0.05). This meta-analysis implies that HA may improve tolerance to discomfort during heat exposure, but may not necessarily improve the associated physiological markers of improved performance.
Topics: Acclimatization; Athletic Performance; Body Temperature; Heart Rate; Hot Temperature; Humans; Lactic Acid; Oxygen Consumption; Plasma Volume; Randomized Controlled Trials as Topic; Skin Temperature
PubMed: 31191102
DOI: No ID Found -
Journal of Thermal Biology Feb 2024Cross-adaptation (CA) refers to the successful induction of physiological adaptation under one environmental stressor (e.g., heat), to enable subsequent benefit in... (Meta-Analysis)
Meta-Analysis
Cross-adaptation (CA) refers to the successful induction of physiological adaptation under one environmental stressor (e.g., heat), to enable subsequent benefit in another (e.g., hypoxia). This systematic review and exploratory meta-analysis investigated the effect of heat acclimation (HA) on physiological, perceptual and physical performance outcome measures during rest, and submaximal and maximal intensity exercise in hypoxia. Database searches in Scopus and MEDLINE were performed. Studies were included when they met the Population, Intervention, Comparison, and Outcome criteria, were of English-language, peer-reviewed, full-text original articles, using human participants. Risk of bias and study quality were assessed using the COnsensus based Standards for the selection of health status Measurement INstruments checklist. Nine studies were included, totalling 79 participants (100 % recreationally trained males). The most common method of HA included fixed-intensity exercise comprising 9 ± 3 sessions, 89 ± 24-min in duration and occurred within 39 ± 2 °C and 32 ± 13 % relative humidity. CA induced a moderate, beneficial effect on physiological measures at rest (oxygen saturation: g = 0.60) and during submaximal exercise (heart rate: g = -0.65, core temperature: g = -0.68 and skin temperature: g = -0.72). A small effect was found for ventilation (g = 0.24) and performance measures (peak power: g = 0.32 and time trial time: g = -0.43) during maximal intensity exercise. No effect was observed for perceptual outcome measures. CA may be appropriate for individuals, such as occupational or military workers, whose access to altitude exposure prior to undertaking submaximal activity in hypoxic conditions is restricted. Methodological variances exist within the current literature, and females and well-trained individuals have yet to be investigated. Future research should focus on these cohorts and explore the mechanistic underpinnings of CA.
Topics: Male; Humans; Acclimatization; Adaptation, Physiological; Heat-Shock Response; Exercise; Hypoxia; Heat Stress Disorders
PubMed: 38471285
DOI: 10.1016/j.jtherbio.2024.103793 -
International Journal of Molecular... Nov 2023Brassinosteroids (BRs), the sixth major phytohormone, can regulate plant salt tolerance. Many studies have been conducted to investigate the effects of BRs on plant salt... (Meta-Analysis)
Meta-Analysis Review
Promotion of Ca Accumulation in Roots by Exogenous Brassinosteroids as a Key Mechanism for Their Enhancement of Plant Salt Tolerance: A Meta-Analysis and Systematic Review.
Brassinosteroids (BRs), the sixth major phytohormone, can regulate plant salt tolerance. Many studies have been conducted to investigate the effects of BRs on plant salt tolerance, generating a large amount of research data. However, a meta-analysis on regulating plant salt tolerance by BRs has not been reported. Therefore, this study conducted a meta-analysis of 132 studies to elucidate the most critical physiological mechanisms by which BRs regulate salt tolerance in plants from a higher dimension and analyze the best ways to apply BRs. The results showed that exogenous BRs significantly increased germination, plant height, root length, and biomass (total dry weight was the largest) of plants under salt stress. There was no significant difference between seed soaking and foliar spraying. However, the medium method (germination stage) and stem application (seedling stage) may be more effective in improving plant salt tolerance. BRs only inhibit germination in Solanaceae. BRs (2 μM), seed soaking for 12 h, and simultaneous treatment with salt stress had the highest germination rate. At the seedling stage, the activity of Brassinolide (CHO) was higher than that of Homobrassinolide (CHO), and post-treatment, BRs (0.02 μM) was the best solution. BRs are unsuitable for use in the germination stage when Sodium chloride is below 100 mM, and the effect is also weakest in the seedling stage. Exogenous BRs promoted photosynthesis, and antioxidant enzyme activity increased the accumulation of osmoregulatory and antioxidant substances and reduced the content of harmful substances and Na, thus reducing cell damage and improving plant salt tolerance. BRs induced the most soluble protein, chlorophyll a, stomatal conductance, net photosynthetic rate, Glutathione peroxidase, and root-Ca, with BRs causing Ca signals in roots probably constituting the most important reason for improving salt tolerance. BRs first promoted the accumulation of Ca in roots, which increased the content of the above vital substances and enzyme activities through the Ca signaling pathway, improving plant salt tolerance.
Topics: Brassinosteroids; Antioxidants; Salt Tolerance; Chlorophyll A; Seedlings; Plant Roots
PubMed: 38003311
DOI: 10.3390/ijms242216123 -
International Journal of Environmental... Nov 2019The population of older people is increasing at a rapid rate, with those 80 years and older set to triple by 2050. This systematic review aimed to examine older people's...
The population of older people is increasing at a rapid rate, with those 80 years and older set to triple by 2050. This systematic review aimed to examine older people's perceptions and behaviours against existing heatwaves prevention measures and systematically categorize and analyse those measures using the Ottawa charter for health promotion framework. Peer-reviewed published literature between 22nd September 2006 and 24th April 2018 was retrieved, according to the PRISMA guidelines, from five different databases. Eighteen articles were finally included. There is a lack of published studies from developing countries. Results were categorized and analysed using the Ottawa charter five action areas. Mitigation strategies from current heat action plans are discussed and gaps are highlighted. A lack of systematic evaluation of heat action plans efficacy was identified. Older people are not demonstrating all recommended preventative measures during heatwaves. Support personnel and health professionals are not being pro-active enough in facilitating prevention of adverse effects from heatwaves. Governments are beginning to implement policy changes, but other recommended support measures outlined in the Ottawa charter are still lacking, and hence require further action. Linkage between specific components of heat action plans and outcomes cannot be ascertained; therefore, more systematic evaluation is needed.
Topics: Acclimatization; Aged; Aged, 80 and over; Developing Countries; Health Promotion; Hot Temperature; Humans
PubMed: 31717424
DOI: 10.3390/ijerph16224370 -
Cureus Apr 2024Entering and acclimatizing to a university is crucial for achieving academic goals and graduation. Chronic illnesses can reduce a person's capacity to perform tasks,... (Review)
Review
Entering and acclimatizing to a university is crucial for achieving academic goals and graduation. Chronic illnesses can reduce a person's capacity to perform tasks, whether physically, cognitively, or emotionally, about inflammatory bowel disease (IBD), there is a lack of research about the impact of IBD on the daily lives of students. IBD can be seen as having an adverse effect on the life of college students. The objective of this review was to examine the psychological ramifications, particularly in relation to stress levels, that IBD elicits in the daily lives of students. The elementary search utilized specific databases, including PubMed, Web of Science, and Google Scholar. The search terms employed were "IBD," "University," "Students," and "Stress." We reviewed 80 papers and selected 25 for their applicability and relevance. The current review includes at least a total of 12 articles. The following issues arose: 1) adaption to university, 2) managing IBD individually and from the university setting, 3) social impact, and 4) methods of controlling and coping with the IBD. Students with IBD have a tough time adapting to new situations. Their emotional and social status plays a significant role in this. The proper management and treatment of IBD throughout studies can have a significant impact on student's academic achievement as well as their later lives.
PubMed: 38807823
DOI: 10.7759/cureus.59176 -
Frontiers in Neuroscience 2021Investigating difficulties during activities of daily living is a fundamental first step for the development of vision-related intervention and rehabilitation...
Investigating difficulties during activities of daily living is a fundamental first step for the development of vision-related intervention and rehabilitation strategies. One way to do this is through visual impairment simulations. The aim of this review is to synthesize and assess the types of simulation methods that have been used to simulate age-related macular degeneration (AMD) in normally sighted participants, during activities of daily living (e.g., reading, cleaning, and cooking). We conducted a systematic literature search in five databases and a critical analysis of the advantages and disadvantages of various AMD simulation methods (following PRISMA guidelines). The review focuses on the suitability of each method for investigating activities of daily living, an assessment of clinical validation procedures, and an evaluation of the adaptation periods for participants. Nineteen studies met the criteria for inclusion. Contact lenses, computer manipulations, gaze contingent displays, and simulation glasses were the main forms of AMD simulation identified. The use of validation and adaptation procedures were reported in approximately two-thirds and half of studies, respectively. Synthesis of the methodology demonstrated that the choice of simulation has been, and should continue to be, guided by the nature of the study. While simulations may never completely replicate vision loss experienced during AMD, consistency in simulation methodology is critical for generating realistic behavioral responses under vision impairment simulation and limiting the influence of confounding factors. Researchers could also come to a consensus regarding the length and form of adaptation by exploring what is an adequate amount of time and type of training required to acclimatize participants to vision impairment simulations.
PubMed: 34483815
DOI: 10.3389/fnins.2021.663062 -
Frontiers in Plant Science 2020Plants are key to the functionality of many ecosystem processes. The duration and intensity of water stress are anticipated to increase in the future; however, a...
Plants are key to the functionality of many ecosystem processes. The duration and intensity of water stress are anticipated to increase in the future; however, a detailed elucidation of the responses of plants to water stress remains incomplete. For this study, we present a meta-analysis derived from the 1,301 paired observations of 84 studies to evaluate the responses of plants to water stress. The results revealed that although water stress inhibited plant growth and photosynthesis, it increased reactive oxygen species (ROS), plasma membrane permeability, enzymatic antioxidants, and non-enzymatic antioxidants. Importantly, these responses generally increased with the intensity and duration of water stress, with a more pronounced decrease in ROS anticipated over time. Our findings suggested that the overproduction of ROS was the primary mechanism behind the responses of plants to water stress, where plants appeared to acclimatize to water stress, to some extent, over time. Our synthesis provides a framework for better understanding the responses and mechanisms of plants under drought conditions.
PubMed: 32676096
DOI: 10.3389/fpls.2020.00978 -
Frontiers in Physiology 2019A majority of high profile international sporting events, including the coming 2020 Tokyo Olympics, are held in warm and humid conditions. When exercising in the heat,...
A majority of high profile international sporting events, including the coming 2020 Tokyo Olympics, are held in warm and humid conditions. When exercising in the heat, the rapid rise of body core temperature ( ) often results in an impairment of exercise capacity and performance. As such, heat mitigation strategies such as aerobic fitness (AF), heat acclimation/acclimatization (HA), pre-exercise cooling (PC) and fluid ingestion (FI) can be introduced to counteract the debilitating effects of heat strain. We performed a meta-analysis to evaluate the effectiveness of these mitigation strategies using magnitude-based inferences. A computer-based literature search was performed up to 24 July 2018 using the electronic databases: PubMed, SPORTDiscus and Google Scholar. After applying a set of inclusion and exclusion criteria, a total of 118 studies were selected for evaluation. Each study was assessed according to the intervention's ability to lower before exercise, attenuate the rise of during exercise, extend at the end of exercise and improve endurance. Weighted averages of Hedges' were calculated for each strategy. PC ( = 1.01) was most effective in lowering before exercise, followed by HA ( = 0.72), AF ( = 0.65), and FI ( = 0.11). FI ( = 0.70) was most effective in attenuating the rate of rise of , followed by HA ( = 0.35), AF ( = -0.03) and PC ( = -0.46). In extending at the end of exercise, AF ( = 1.11) was most influential, followed by HA ( = -0.28), PC ( = -0.29) and FI ( = -0.50). In combination, AF ( = 0.45) was most effective at favorably altering T, followed by HA ( = 0.42), PC ( = 0.11) and FI ( = 0.09). AF (1.01) was also found to be most effective in improving endurance, followed by HA (0.19), FI (-0.16) and PC (-0.20). AF was found to be the most effective in terms of a strategy's ability to favorably alter , followed by HA, PC and lastly, FI. Interestingly, a similar ranking was observed in improving endurance, with AF being the most effective, followed by HA, FI, and PC. Knowledge gained from this meta-analysis will be useful in allowing athletes, coaches and sport scientists to make informed decisions when employing heat mitigation strategies during competitions in hot environments.
PubMed: 30842739
DOI: 10.3389/fphys.2019.00071 -
Global Change Biology Jan 2019Rising atmospheric CO concentration is a key driver of enhanced global greening, thought to account for up to 70% of increased global vegetation in recent decades. CO... (Meta-Analysis)
Meta-Analysis
Rising atmospheric CO concentration is a key driver of enhanced global greening, thought to account for up to 70% of increased global vegetation in recent decades. CO fertilization effects have further profound implications for ecosystems, food security and biosphere-atmosphere feedbacks. However, it is also possible that current trends will not continue, due to ecosystem level constraints and as plants acclimate to future CO concentrations. Future predictions of plant response to rising [CO ] are often validated using single-generation short-term FACE (Free Air CO Enrichment) experiments but whether this accurately represents vegetation response over decades is unclear. The role of transgenerational plasticity and adaptation in the multigenerational response has yet to be elucidated. Here, we propose that naturally occurring high CO springs provide a proxy to quantify the multigenerational and long-term impacts of rising [CO ] in herbaceous and woody species respectively, such that plasticity, transgenerational effects and genetic adaptation can be quantified together in these systems. In this first meta-analysis of responses to elevated [CO ] at natural CO springs, we show that the magnitude and direction of change in eight of nine functional plant traits are consistent between spring and FACE experiments. We found increased photosynthesis (49.8% in spring experiments, comparable to 32.1% in FACE experiments) and leaf starch (58.6% spring, 84.3% FACE), decreased stomatal conductance (g , 27.2% spring, 21.1% FACE), leaf nitrogen content (6.3% spring, 13.3% FACE) and Specific Leaf Area (SLA, 9.7% spring, 6.0% FACE). These findings not only validate the use of these sites for studying multigenerational plant response to elevated [CO ], but additionally suggest that long-term positive photosynthetic response to rising [CO ] are likely to continue as predicted by single-generation exposure FACE experiments.
Topics: Acclimatization; Carbon Dioxide; Ecosystem; Environment; Natural Springs; Photosynthesis; Plant Leaves; Plants
PubMed: 30422366
DOI: 10.1111/gcb.14437