32 results on '"Raepsaet, C."'
Search Results
2. Magmatic water content in HIMU basalts from the Cook-Austral Islands: constraints on degassing processes and source composition from clinopyroxene phenocrysts.
- Author
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Bruce-Etzel, Leslie A., Marshall, Edward W., and Lassiter, John C.
- Abstract
The amount of water recycled during subduction is unclear. Water/Ce estimates in HIMU (high-
238 U/204 Pb) basalts are variable, ranging from < 100 to > 250 in glasses and melt inclusions. Because clinopyroxene (cpx) is a common early liquidus phase and the cpx/melt partitioning of water is well constrained, cpx phenocrysts provide an additional constraint on magmatic water contents. We present water and trace element concentrations in HIMU-basalt-hosted cpx phenocrysts from the Austral Islands. Calculated melt [H2 O] (up to 4.3 wt.%) and H2 O/Ce ratios (22–825) are higher than in olivine-hosted inclusions, as are estimated equilibration pressures. Correlation between estimated melt [H2 O] and crystallization or entrapment pressure suggests significant water loss during magma ascent. Most ocean island basalts (OIBs) span a limited range in H2 O (~ 1–1.5 wt.%), and low (< 100) H2 O/Ce ratios are primarily observed in melts with unusually high [Ce] (up to 350 ppm). Additionally, [H2 O] and H2 O/Ce in some suites correlate with entrapment pressure despite having quench pressures high enough to prevent significant water loss from open- or closed-system degassing (< 100 MPa). Polybaric "sparging", whereby low-P melts re-equilibrate with CO2 -rich fluids exsolved at higher pressure, may result in water loss at pressures less than CO2 saturation. This may more accurately describe OIB degassing processes than open or closed system degassing. After correcting for degassing, primary Australs melts likely have H2 O/Ce of ~ 300–600. If applicable to OIB sources in general, this limits the total water budget of the mantle, including the mantle transition zone, to < 2.4 ocean masses. [ABSTRACT FROM AUTHOR]- Published
- 2024
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3. Thermodynamic and kinetic controls on phase stability and incorporation of water in larnite (β-Ca2SiO4): implications for calcium silicate inclusions in diamonds.
- Author
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Gregson, Chris, Brooker, Richard A., Kohn, Simon C., and Lord, Oliver T.
- Abstract
Larnite (β-Ca
2 SiO4 ) has previously been reported as an inclusion in sub-lithospheric diamonds and is generally interpreted as a retrograde reaction product of calcium silicate perovskite. In this study, we review the controls on the stability of the Ca2 SiO4 polymorphs and show that phosphorus is likely essential for the preservation of β-Ca2 SiO4 . We also report a detailed study of the solubility of water and its incorporation mechanisms in γ-Ca2 SiO4 and phosphorus-doped β-Ca2 SiO4 using FTIR spectroscopy on high-pressure experiments quenched from 4–9.5 GPa and 1000–1200 °C combined with ab initio calculations. The experimentally determined water solubilities are in the range of 107–178 ppm. Our FTIR spectra and ab initio calculations indicate that for phosphorus-free γ-Ca2 SiO4 the incorporation mechanism involves protonated Si and Ca1 vacancies. For phosphorus-bearing β-Ca2 SiO4 , our preferred incorporation mechanism involves one Si4+ ion replaced by one P5+ ion with a single protonated Ca2 vacancy. The low water solubility observed here for larnite implies that if primary calcium silicate perovskite inclusions trap high water concentrations during diamond growth from a volatile-rich fluid, measurements of the concentration of water in larnite will not provide a useful record of the initial volatile concentration. Instead, water would be hosted in other retrograde reaction products, possibly including exsolved fluids. [ABSTRACT FROM AUTHOR]- Published
- 2024
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4. Temperature and compositional dependences of H2O solubility in majorite.
- Author
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Liu, Dan, Purevjav, Narangoo, Fei, Hongzhan, Withers, Anthony C., Ye, Yu, and Katsura, Tomoo
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SLABS (Structural geology) ,ZONE melting ,HYDROUS ,SOLUBILITY ,ALUMINUM oxide - Abstract
We systematically investigated H
2 O solubility in majorite as a function of temperature from 1670–2270 K under a pressure of 20 GPa using multi-anvil techniques. The H2 O solubility in majorite decreases with increasing temperature. In addition, the H2 O content is relatively independent of the concentrations of Al2 O3 and SiO2 in majorite. Majorite can store more H2 O than bridgmanite in the lower mantle. Therefore, when a slab sinks into the lower mantle, hydrous melt could be produced not only by the phase transformation from ringwoodite to bridgmanite + ferropericlase near 660 km depth but also by the majorite to bridgmanite transformation over a wide range of depths from 660 km up to ~800 km, at which majorite dissolves completely in bridgmanite. [ABSTRACT FROM AUTHOR]- Published
- 2024
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5. Charge Phenomena in the Elastic Backscattering of Electrons from Insulating Polymers.
- Author
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Dapor, Maurizio
- Subjects
MONTE Carlo method ,ELECTRON spectroscopy ,CARBON-based materials ,ELECTRON backscattering ,ELECTRON kinetic energy - Abstract
Elastic peak electron spectroscopy (EPES) analyzes the line shape of the elastic peak. The reduction in energy of the elastic peak electrons is the result of energy transfer to the target atoms, a phenomenon known as recoil energy. EPES differs from other electron spectroscopies in its unique ability to identify hydrogen in polymers and hydrogenated carbon-based materials. This feature is particularly noteworthy as lighter elements exhibit stronger energy shifts. The energy difference between the positions of the elastic peak of carbon and the elastic peak of hydrogen tends to increase as the kinetic energy of the incident electrons increases. During electron irradiation of an insulating polymer, if the number of secondary electrons emitted from the surface is less than the number of electrons absorbed in the sample, the surface floats energetically until it stabilizes at a potential energy e V s . As a result, the interaction energy changes and modifies the energy difference between the elastic peaks of hydrogen and carbon. In this study, the charge effects are evaluated using the Monte Carlo method to simulate the EPES spectra of electrons interacting with polystyrene and polyethylene. [ABSTRACT FROM AUTHOR]
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- 2024
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6. Prognostic factors for the development of incontinence‐associated dermatitis (IAD): A systematic review.
- Author
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Deprez, Julie, Ohde, Nils, Eilegård Wallin, Alexandra, Bååth, Carina, Hommel, Ami, Hultin, Lisa, Josefson, Anna, Kottner, Jan, and Beeckman, Dimitri
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RISK assessment ,MEDICAL information storage & retrieval systems ,SKIN inflammation ,RESEARCH funding ,CINAHL database ,DESCRIPTIVE statistics ,DECISION making in clinical medicine ,SYSTEMATIC reviews ,MEDLINE ,MEDICAL databases ,QUALITY of life ,DATA analysis software ,DISEASE susceptibility ,DISEASE risk factors - Abstract
Incontinence‐associated dermatitis (IAD) is an irritant contact dermatitis from prolonged contact with urine or faeces, which can significantly impact patient comfort and quality of life. The identification of prognostic factors for the development of IAD has the potential to enhance management, support preventive measures and guide future research. The objective of this systematic review was to summarize the empirical evidence of prognostic factors for the development of IAD. This study included prospective and retrospective observational studies or clinical trials that described prognostic factors associated with IAD. There were no restrictions on setting, time, language, participants or geographical regions. Exclusion criteria included reviews, editorials, commentaries, methodological articles, letters to the editor, cross‐sectional and case–control studies, and case reports. Searches were conducted from inception to April 2024 on MEDLINE, CINAHL, EMBASE and the Cochrane Library. The studies were assessed by two independent reviewers using the QUIPS and the CHARMS‐PF for data extraction. A narrative synthesis approach was employed due to study heterogeneity and using the 'vote counting based on direction' method and the sign test. The overall certainty of evidence was assessed using adapted GRADE criteria. The review included 12 studies and identified 15 potential predictors. Moderate‐quality evidence suggests that increased stool frequency, limited mobility and friction/shear problems are risk factors for IAD development. Female sex, older age, vasopressor use and loose/liquid stool are risk factors supported by low‐quality evidence. Increased stool frequency, limited mobility and friction/shear problems seem to be risk factors for the development of IAD. There is insufficient evidence to support the predictive validity of female sex, older age, loose/liquid stool and vasopressor use. There is substantial methodological variability across studies, making it challenging to make comparisons. Large‐scale cohort studies in different settings that incorporate our review findings should be conducted in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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7. Exploring the effect of wound related pain on psychological stress, inflammatory response, and wound healing.
- Author
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Woo, Kevin, González, Carol Viviana Serna, Amdie, Fisseha Zewdu, and de Gouveia Santos, Vera Lúcia Conceição
- Subjects
WOUND healing ,PAIN measurement ,WOUNDS & injuries ,STATISTICAL correlation ,RESEARCH funding ,SCIENTIFIC observation ,STATISTICAL sampling ,DIABETIC neuropathies ,QUESTIONNAIRES ,LOGISTIC regression analysis ,TREATMENT effectiveness ,DESCRIPTIVE statistics ,BRIEF Pain Inventory ,MCGILL Pain Questionnaire ,LONGITUDINAL method ,PSYCHOLOGICAL stress ,PROTEOLYTIC enzymes ,INFLAMMATION ,BIOPSYCHOSOCIAL model ,CHRONIC wounds & injuries - Abstract
Aims and Objectives: The relationship between pain and poor healing is intricate, potentially mediated by psychological stress and aberrations in inflammatory response. The purpose of this study was to examine the biopsychosocial model of pain by assessing the relationships between pain, stress, inflammation and healing in people with chronic wounds. Design: This was a 4‐week prospective observational study to explore the relationship of pain, stress, inflammation and wound healing in a convenience sample of patients with chronic wounds in a chronic care hospital in Canada. Methods: Only subjects over 18 with chronic wounds were recruited into the study. Chronic wounds were defined by the duration of wounds for more than 4 weeks of various aetiologies including wounds caused by pressure injuries, venous disease, arterial insufficiency, surgery or trauma and diabetic neuropathy. Participants were evaluated for pain by responding to the Brief Pain Inventory‐Short Form, the McGill Pain Questionnaire‐Short Form and the Leeds Assessment of Neuropathic Symptoms and Signs scale. Stress was measured by the Perceived Stress Scale (PSS). All wounds were assessed with the Pressure Ulcer Scale for Healing tool. The levels of matrix metalloproteinases were analysis by obtaining wound fluid from all participants. Results: A total of 32 individuals with chronic wounds participated in the study. Correlation analysis indicated pain severity was positively and significantly related to pain interference, McGill Pain Questionnaire scores, neuropathic pain and matrix metalloproteinase levels. Logistic regression was used to determine the predictors for high or low perceived stress. The only significant variable that contributed to the stress levels was BPI‐I. Results suggested that participants who experienced higher levels of pain interference also had an increased odds to report high level of stress by 1.6 times controlling for all other factor in the model. Conclusion: Pain is a complex biopsychosocial phenomenon affecting quality of life in people with chronic wounds. Results of this study identified a significant relationship between pain, stress and wound healing. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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8. Pressure-induced large volume collapse and possible spin transition in HP-PdF2-type FeCl2.
- Author
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Yao, Yao, Liu, Xi, Du, Xueyan, Zhang, Lili, and Yuan, Hongsheng
- Abstract
Iron hydroxide FeO
2 Hx (x ≤ 1) and ferrous iron chloride FeCl2 can adopt the HP-PdF2 -type (space group: , Z = 4) structure in the lowermost mantle, potentially contributing to the geochemical cycles of hydrogen and chlorine within Earth’s deep interior, respectively. Here we investigate the high-pressure behavior of HP-PdF2 -type FeCl2 by X-ray diffraction (XRD) and Raman measurements in laser-heated diamond anvil cells. Our results show that HP-PdF2 -type FeCl2 can be formed at 60‒67 GPa and 1650‒1850 K. Upon cold decompression, the diffraction peaks at pressures above 10 GPa can be indexed to the HP-PdF2 -type structure. Intriguingly, the calculated cell volumes reveal a remarkable decrease of ΔV / V = ∼ 14% between 36 and 40 GPa, which is possibly caused by a pressure-induced spin transition of Fe2+ (HS: high-spin → LS: low-spin). We also observe distinct changes in Raman spectra at 33‒35 GPa, practically coinciding with the onset pressures of isostructural phase transition in XRD results. Our observations combined with previous studies conducted at megabar pressures suggest that HP-PdF2 -type FeCl2 , with a wide pressure stability range, if present in subducting slabs, could facilitate the transport of chlorine from the middle lower mantle to the outer core. [ABSTRACT FROM AUTHOR]- Published
- 2024
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9. The Precipitation and Redistribution of Alloying Element in Zircaloy-4 Cladding Tube Oxidized in High-Temperature Steam.
- Author
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Amaya, Masaki
- Subjects
NUCLEAR fuel claddings ,LIGHT water reactors ,ZIRCONIUM alloys ,MELTING points ,PHASE diagrams ,ZIRCONIUM oxide ,ALLOYS - Abstract
Zirconium (Zr)-based alloys are widely used as fuel cladding material for light water reactors. Under a loss-of-coolant accident (LOCA) condition, the oxidation of fuel cladding by high-temperature steam induces the degradation of mechanical properties of the cladding and would affect the integrity of fuel rods and/or assemblies, etc., during LOCA. In this study, the distribution of the elements (zirconium, oxygen, tin, iron and chromium) in Zircaloy-4 cladding specimens oxidized in the temperature range of ~ 1350– ~ 1700 K in steam was analyzed along the radial direction of the specimens by using SEM/EPMA, and the cause of element distribution in the specimens was discussed in consideration of the morphology of precipitates in the specimens and hypothesized phase diagrams related to the elements contained in the specimens. The form of the particles precipitated and the comparison between SEM/EPMA results and hypothesized phase diagrams of Zr–Sn–O system suggested that the liquefaction of tin-rich material and/or Zr–(Fe,Cr) compounds occurred during the oxidation test. The results obtained indicate that Zircaloy-4 cladding tubes would start melting at the melting point of tin-oxide and the eutectic point of Zr-(Fe,Cr) compounds, which is much lower than the melting point of Zr, α-Zr(O), or zirconium oxide (ZrO
2 ). [ABSTRACT FROM AUTHOR]- Published
- 2024
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10. Deutsche Übersetzung des Know-IAD-Instrumentes.
- Author
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Durakovic, Haris, Gaugl, Patricia, Klug, Lena, Stark, Matthias, and Bauer, Silvia
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- 2024
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11. Review of experimental and analytical techniques to determine H, C, N, and S solubility and metal–silicate partitioning during planetary differentiation.
- Author
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Dalou, Celia, Suer, Terry-Ann, Tissandier, Laurent, Ofierska, Weronika L., Girani, Alice, and Sossi, Paolo A.
- Subjects
SIDEROPHILE elements ,ORIGIN of planets ,INNER planets ,SOLUBILITY ,RESEARCH personnel ,MAGMAS - Abstract
During their formation, terrestrial planets underwent a magma ocean phase during which their metallic cores segregated from their silicate mantles and their early atmospheres formed. These planetary formation processes resulted in a redistribution of the abundances of highly volatile elements (HVEs, such as H, C, N, and S) between the planets' metallic cores, silicate mantles, and atmospheres. This review presents the numerous experimental techniques used to simulate the conditions and identify the parameters that influenced the behavior of HVEs during planetary formation. We also review the analytical techniques used to characterize the different types of experimental samples and quantify the distribution of HVEs between metallic and silicate phases, as well as their solubilities in silicate glasses. This exhaustive review targets students and young researchers beginning their work on the subject, or, more generally, scientists seeking a better understanding of this field of research. [ABSTRACT FROM AUTHOR]
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- 2024
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12. Characterization of Biodegradable Polymers for Porous Structure: Further Steps toward Sustainable Plastics.
- Author
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Lima, Guilherme M. R., Mukherjee, Adrivit, Picchioni, Francesco, and Bose, Ranjita K.
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POROUS polymers ,POLYMER structure ,SUPERCRITICAL carbon dioxide ,FOAM ,POROUS materials ,BIODEGRADABLE plastics ,POLYBUTYLENE terephthalate - Abstract
Plastic pollution poses a significant environmental challenge, necessitating the investigation of bioplastics with reduced end-of-life impact. This study systematically characterizes four promising bioplastics—polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), and polylactic acid (PLA). Through a comprehensive analysis of their chemical, thermal, and mechanical properties, we elucidate their structural intricacies, processing behaviors, and potential morphologies. Employing an environmentally friendly process utilizing supercritical carbon dioxide, we successfully produced porous materials with microcellular structures. PBAT, PBS, and PLA exhibit closed-cell morphologies, while PHBV presents open cells, reflecting their distinct overall properties. Notably, PBAT foam demonstrated an average porous area of 1030.86 μm
2 , PBS showed an average porous area of 673 μm2 , PHBV displayed open pores with an average area of 116.6 μm2 , and PLA exhibited an average porous area of 620 μm2 . Despite the intricacies involved in correlating morphology with material properties, the observed variations in pore area sizes align with the findings from chemical, thermal, and mechanical characterization. This alignment enhances our understanding of the morphological characteristics of each sample. Therefore, here, we report an advancement and comprehensive research in bioplastics, offering deeper insights into their properties and potential morphologies with an easy sustainable foaming process. The alignment of the process with sustainability principles, coupled with the unique features of each polymer, positions them as environmentally conscious and versatile materials for a range of applications. [ABSTRACT FROM AUTHOR]- Published
- 2024
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13. The frictional energy absorber effectiveness and its impact on the pressure ulcer prevention performance of multilayer dressings.
- Author
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Marché, Cécile, Creehan, Sue, and Gefen, Amit
- Subjects
HEEL (Anatomy) ,WOUND healing ,LEG ulcers ,RESEARCH funding ,BANDAGES & bandaging ,HEEL bone fractures ,FOAMED materials ,TREATMENT effectiveness ,DESCRIPTIVE statistics ,BIOMEDICAL engineering ,SURGICAL dressings ,FRICTION ,WOUND care ,PRESSURE ulcers ,CHRONIC wounds & injuries - Abstract
Pressure ulcers including heel ulcers remain a global healthcare concern. This study comprehensively evaluates the biomechanical effectiveness of the market‐popular ALLEVYN® LIFE multilayer dressing in preventing heel ulcers. It focuses on the contribution of the frictional sliding occurring between the non‐bonded, fully independent layers of this dressing type when the dressing is protecting the body from friction and shear. The layer‐on‐layer sliding phenomenon, which this dressing design enables, named here the frictional energy absorber effectiveness (FEAE), absorbs approximately 30%–45% of the mechanical energy resulting from the foot weight, friction and shear acting to distort soft tissues in a supine position, thereby reducing the risk of heel ulcers. Introducing the novel theoretical FEAE formulation, new laboratory methods to quantify the FEAE and a review of relevant clinical studies, this research underlines the importance of the FEAE in protecting the heels of at‐risk patients. The work builds on a decade of research published by our group in analysing and evaluating dressing designs for pressure ulcer prevention and will be useful for clinicians, manufacturers, regulators and reimbursing bodies in assessing the effectiveness of dressings indicated or considered for prophylactic use. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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14. Skin integrity, antimicrobial stewardship and infection control: a critical review of current best practice.
- Author
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Blackburn, Joanna, Kopecki, Zlatko, and Ousey, Karen J.
- Abstract
'Skin integrity' refers to intact, unbroken, and healthy skin. Disruption of skin integrity can be caused by intrinsic and extrinsic factors including altered nutritional status, vascular disease, diabetes, and tissue injury, and this is often associated with development of localised clinical infection. Skin health and hygiene is important for preventing wounds and development of localised clinical infection or sepsis. Clinical wound infection is an increasing problem in healthcare, with the potential for increasing the burden of antimicrobial resistance (AMR), if antimicrobials are overused to treat wound infection. In this review we discuss skin integrity and wound infection prevention and outline the guiding principles of antimicrobial resistance and antimicrobial stewardship for infection control. Additionally, we provide a critical review of current best practice, highlighting the pathway to guide management of patients at risk of infection development, and discuss the latest research progress on antimicrobial resistance and skin integrity. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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15. What is the evidence on skin care for maintaining skin integrity and prevention of wounds? An integrative review.
- Author
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O'Brien, Jane, Parker, Christina N., Bui, Ut, MacAndrew, Margaret, Mitchell, Jack, and Finlayson, Kathleen J.
- Abstract
Aim To synthesise evidence regarding skin care to maintain skin integrity and prevent wounds. Methods An electronic search of key terms (skin care or skin integrity) was undertaken of articles published between 1 January 2018 until 30 September 2023. A narrative integrative review synthesised results. Results In all 73 articles met the inclusion criteria. The topics included cleansers, moisturisers, and/or barrier products (n=33), health service interventions related to skin care (n=15), and the impact of dressings on skin integrity (n=12). Eight encompassed multiple interventions, three examined self-management and two foot skin care. Conclusion Strong evidence on skin management to prevent wounds is limited. Moderate evidence supported the use of mild, non-alkaline cleansers and low pH moisturisers with humectants to improve skin integrity and prevent skin tears; in addition to prompt cleansing, use of topical barrier leave-on products and absorbent products to prevent incontinenceassociated dermatitis. The choice of prophylactic dressing is not a one-size-fits-all decision but rather a nuanced clinical decision that must consider the specific needs and circumstances of each patient. Use of person-centred care, evidencebased interventions by healthcare providers, and involvement of the interprofessional teams emerged as central themes of skin care for prevention of wounds. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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16. La trilogía del enfermero de práctica avanzada para mejorar la efectividad en las heridas crónicas en el Distrito Sanitario Almería.
- Author
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Jiménez García, Juan Francisco, Zapata López, Miguel, Jiménez Abad, Juan Francisco, Ardít Lucas, Rafael Amaro, and García Fernández, Francisco Pedro
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COST effectiveness ,BANDAGES & bandaging ,RETROSPECTIVE studies ,DESCRIPTIVE statistics ,TEACHING methods ,NURSE practitioners ,PROFESSIONS ,MEDICAL records ,ACQUISITION of data ,RESEARCH methodology ,SURGICAL dressings ,WOUND care ,CHRONIC wounds & injuries ,COMPUTER assisted testing (Education) ,MEDICAL care costs - Abstract
Copyright of Gerokomos is the property of Indemm Farma SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
17. Halogen fractionation during vapor-brine phase separation revealed by in situ Cl, Br, and I analysis of scapolite from the Yixingzhai gold deposit, North China Craton.
- Author
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Gao, Wen-Sheng, Deng, Xiao-Dong, Chen, Lei, Zhang, Li-Zhong, Li, Yu-Xiang, Luo, Tao, and Li, Jian-Wei
- Subjects
PHASE separation ,HALOGENS ,BROMINE ,STRONTIUM isotopes ,FLUID inclusions ,PRECIPITATION (Chemistry) ,ISOTOPIC analysis - Abstract
Halogens (Cl, Br, and I) are major complexing agents for metal ions, and their ratios (Br/Cl and I/Cl) have been used to determine the source and evolution of hydrothermal fluid. Halogen fractionation during hydrothermal fluid evolution, however, has been inferred from several studies, which poses problems in using halogen ratios as a fluid tracer. The Br/Cl and I/Cl ratios of scapolite are consistent with those ratios present in the coexisting fluid during scapolite formation, making this mineral particularly useful for understanding hydrothermal fluid evolution. To better understand halogen fractionation during vapor-brine phase separation, we conducted fluid inclusion microthermometry, major elements, and in situ halogens and Sr isotope analysis of scapolite formed from a high-salinity hydrothermal fluid during the vapor-brine phase separation at the Yixingzhai gold deposit, North China Craton. The studied scapolite has 1.84–3.41 wt% Cl, 389–806 ppm Br, 8.4–24.4 ppm I, and significantly high Br/Cl (6.1–14.7 × 10
–3 ) and high I/Cl (91–302 × 10–6 ) molar ratios that likely result from the preferential incorporation of Br and I into the brine phase compared to Cl entering the vapor phase during fluid phase separation. Based on fluid inclusion microthermometry results, the Rayleigh fractionation simulation shows that the Br/Cl and I/Cl ratios of the brine are estimated to be up to 18 × 10–3 and 500 × 10–6 during the formation of scapolite. These results reveal halogen fractionation during the vapor-brine phase separation of hydrothermal fluids. This view has implications for interpreting the halogen systematics of scapolite and other minerals formed in similar environments, particularly when they are used as a fluid tracer. [ABSTRACT FROM AUTHOR]- Published
- 2024
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18. Investigating Hydrogen in Zirconium Alloys by Means of Neutron Imaging.
- Author
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Weick, Sarah and Grosse, Mirco
- Subjects
ZIRCONIUM alloys ,LIGHT water reactors ,NUCLEAR fuel claddings ,NEUTRONS ,HYDROGEN content of metals - Abstract
Neutrons interact with the magnetic moment of the atomic shell of an atom, as is common for X-rays, but mainly they interact directly with the nucleus. Therefore, the atomic number and the related number of electrons does not play a role in the strength of an interaction. Instead, hydrogen that is nearly invisible for X-rays has a higher attenuation for neutrons than most of the metals, e.g., zirconium, and thus would be visible through dark contrast in neutron images. Consequently, neutron imaging is a precise, non-destructive method to quantify the amount of hydrogen in materials with low attenuation. Because nuclear fuel cladding tubes of light water reactors are made of zirconium (98%), the hydrogen amount and distribution in metallic claddings can be investigated. Even hydrogen concentrations smaller than 10 wt.ppm can be determined locally with a spatial resolution of less than 10 μm (with a high-resolution neutron microscope). All in all, neutron imaging is a very fast and precise method for several applications. This article explains the basics of neutron imaging and provides samples of investigation possibilities, e.g., for hydrogen in zirconium alloy cladding tubes or in situ investigations of hydrogen diffusion in metals. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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19. An objective comparative study of non‐surgical cleansing techniques and cleanser types in bacterial burden management.
- Author
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Oropallo, Alisha, Rao, Amit S., Del Pin, Christina, Ranire‐Maguire, Marisa, and Mathew, Angelin
- Subjects
BACTERIAL disease prevention ,WOUND healing ,HYGIENE ,BIOFILMS ,QUANTITATIVE research ,POVIDONE-iodine ,COMPARATIVE studies ,PSEUDOMONAS diseases ,ACETIC acid ,PHYSIOLOGIC salines ,ALGORITHMS - Abstract
Cleansing is a vital component of effective wound hygiene and biofilm management, often accomplished through vigorous mechanical action or through soaking with moistened gauze. In the present study, a quantitative comparison of the effectiveness of different cleansing techniques and solutions in removing bacteria was conducted on 71 chronic wounds using bacterial fluorescence imaging as a real‐time diagnostic for moderate to high bacterial loads. Vigorous gauze cleansing for 30 s proved most effective by reducing bacterial fluorescence by 33.99%, surpassing 10‐min soaking in bacterial reduction (13.24%). Among different cleansers, no statistically significant differences in effectiveness were observed, but povidone‐iodine showed the strongest trend towards bacterial reduction. Sub‐analysis highlighted the superiority of antiseptic cleansers over saline and gentle soap (−33.30% vs. −1.80% bacterial reduction respectively). Five percent acetic acid was also shown to be more effective in removing specific bacterial strains (Pseudomonas aeruginosa). Findings from studies like this contribute to refining wound hygiene guidelines and clinical algorithms for bacterial and biofilm management. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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20. Fluid handling by foam wound dressings: From engineering theory to advanced laboratory performance evaluations.
- Author
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Gefen, Amit, Alves, Paulo, Beeckman, Dimitri, Cullen, Breda, Lázaro‐Martínez, José Luis, Lev‐Tov, Hadar, Santamaria, Nick, Swanson, Terry, Woo, Kevin, Söderström, Bengt, Svensby, Anna, Malone, Matthew, and Nygren, Erik
- Subjects
EVALUATION of medical care ,WOUND healing ,DRINKING (Physiology) ,LABORATORIES ,ENGINEERING ,VISCOSITY ,SURGICAL dressings ,FOAMED materials ,WOUND care - Abstract
This article describes the contemporary bioengineering theory and practice of evaluating the fluid handling performance of foam‐based dressings, with focus on the important and clinically relevant engineering structure–function relationships and on advanced laboratory testing methods for pre‐clinical quantitative assessments of this common type of wound dressings. The effects of key wound dressing material‐related and treatment‐related physical factors on the absorbency and overall fluid handling of foam‐based dressings are thoroughly and quantitively analysed. Discussions include exudate viscosity and temperature, action of mechanical forces and the dressing microstructure and associated interactions. Based on this comprehensive review, we propose a newly developed testing method, experimental metrics and clinical benchmarks that are clinically relevant and can set the standard for robust fluid handling performance evaluations. The purpose of this evaluative framework is to translate the physical characteristics and performance determinants of a foam dressing into achievable best clinical outcomes. These guiding principles are key to distinguishing desirable properties of a dressing that contribute to optimal performance in clinical settings. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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21. The efficacy of sacral foam dressing in preventing sacral pressure injury: A systematic review and meta‐analysis.
- Author
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Xia, Jing, Huang, Kai, Jiang, Qiting, and Wang, Wen
- Subjects
ONLINE information services ,META-analysis ,MEDICAL information storage & retrieval systems ,CONFIDENCE intervals ,ERYTHEMA ,PRESSURE ulcers ,SYSTEMATIC reviews ,TREATMENT effectiveness ,COMPARATIVE studies ,SACRUM ,RESEARCH funding ,MEDLINE ,ODDS ratio ,SURGICAL dressings ,FOAMED materials - Abstract
Purpose: We aim to evaluate the efficacy of sacral foam dressings in preventing sacral pressure injury. Methods: The PubMed, Embase and Web of Science databases were searched for relevant publications until October 2023. All studies evaluating the efficacy of sacral foam dressings in preventing sacral pressure injury were included. We calculated pooled risk ratio (RR) with 95% confidence intervals (CIs) for binary outcomes. The Cochrane's Risk of Bias Tool were used to evaluate the quality of studies. Results: A total of 9 randomized controlled studies with 3972 patients were included in this analysis. Sacral pressure injury rate was significantly lower in the sacral foam dressing group compared with the standard care group (RR: 0.37, 95% CI: 0.17–0.82). Furthermore, the rate of ≥stage II sacral pressure injury was also significantly reduced (RR: 0.56, 95% CI: 0.37–0.83), along with a lower blanching erythema rate (RR: 0.64, 95% CI: 0.42–0.97). No obvious publication bias was observed in the funnel plot (Egger's p values = 0.91). Conclusions: Sacral foam dressing significantly reduced the incidence of sacral pressure injuries, including those of stage II or higher, and blanching erythema when compared to standard care without sacral foam dressing. However, the results should be interpreted with cautious because of the observed heterogeneity and the diverse patient population. Further larger, well‐designed randomized control studies are needed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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22. The incidence of intraoperatively acquired pressure injuries in the park‐bench position was reduced by applying soft silicone multilayer foam dressings.
- Author
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Yoshimura, Mine, Kohno, Michihiro, Okamoto, Yukako, Tsuchiya, Sakura, Ogawa, Kyoko, Fukuma, Akane, Kurihara, Chie, Miyama, Mari, and Matsumura, Hajime
- Subjects
PREVENTION of surgical complications ,INDUCED hypothermia ,ELECTIVE surgery ,RESEARCH ,STATISTICS ,SURGICAL blood loss ,WOUND healing ,BODY temperature ,ACADEMIC medical centers ,CONFIDENCE intervals ,HEMOGLOBINS ,SCIENTIFIC observation ,PRESSURE ulcers ,NEUROSURGERY ,MULTIPLE regression analysis ,MULTIVARIATE analysis ,TIME ,POSTOPERATIVE care ,DISEASE incidence ,HEALTH status indicators ,ACQUISITION of data ,FISHER exact test ,MANN Whitney U Test ,RISK assessment ,SERUM albumin ,MEDICAL protocols ,T-test (Statistics) ,SEX distribution ,BRAIN tumors ,TREATMENT effectiveness ,COMPARATIVE studies ,SURGICAL site ,RESEARCH funding ,DESCRIPTIVE statistics ,MEDICAL records ,CHI-squared test ,ODDS ratio ,RECEIVER operating characteristic curves ,DATA analysis ,DATA analysis software ,PATIENT positioning ,SURGICAL dressings ,FOAMED materials ,LONGITUDINAL method ,BEDSORE risk factors ,DISEASE risk factors - Abstract
The Park‐Bench Position (PBP) is associated with a high incidence rate of intraoperatively acquired pressure injuries (IAPIs). Preventive measures must be established to prevent the development of IAPIs. We investigated the risk factors for PBP by applying a soft silicone multilayered foam dressing (SMD) under core temperature management to prevent IAPIs. We conducted a prospective, single‐centre, open‐label observational study of patients undergoing elective neurosurgery operations using PBP in a university hospital in Japan. The incidence rate of IAPIs in this study was compared with that in our two previous studies, in which a film dressing was applied and core temperature management was not performed. IAPIs developed in 90 patients (6.7%); in the lateral thoracic region in five patients and the iliac crest region in one patient. The operative time (every 1 h: p = 0.0001, OR: odds ratio 3.62, 95% CI: confidence interval 1.73–11.42) was significantly associated with the incidence of IAPIs. In our two previous studies, the incidence rate of IAPIs was 11.0% and 24.1%, respectively, when film dressing was used. SMD may weaken the involvement of risk factors in IAPIs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
23. Water Speciation and Storage Capacity of Olivine under the Reduced Fluid—Peridotite Interaction.
- Author
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Kupriyanov, Igor N., Sokol, Alexander G., and Kruk, Alexey N.
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OLIVINE ,WATER storage ,PERIDOTITE ,REGOLITH ,STEARIC acid ,INFRARED spectra - Abstract
The key features of the interaction between peridotites of the continental lithospheric mantle and reduced hydrocarbon-rich fluids have been studied in experiments conducted at 5.5 GPa and 1200 °C. Under this interaction, the original harzburgite undergoes recrystallization while the composition of the fluid changes from CH
4 -H2 O to H2 O-rich with a small amount of CO2 . The oxygen fugacity in the experiments varied from the iron-wustite (IW) to enstatite-magnesite-olivine-graphite/diamond (EMOG) buffers. Olivines recrystallized in the interaction between harzburgite and a fluid generated by the decomposition of stearic acid contain inclusions composed of graphite and methane with traces of ethane and hydrogen. The water content of such olivines slightly exceeds that of the original harzburgite. Redox metasomatism, which involves the oxidation of hydrocarbons in the fluid by reaction with magnesite-bearing peridotite, leads to the appearance of additional OH absorption bands in the infrared spectra of olivines. The water content of olivine in this case increases by approximately two times, reaching 160–180 wt. ppm. When hydrocarbons are oxidized by interaction with hematite-bearing peridotite, olivine captures Ca-Mg-Fe carbonates, which are products of carbonate melt quenching. This oxidative metasomatism is characterized by the appearance of specific OH absorption bands and a significant increase in the total water content in olivine of up to 500–600 wt. ppm. These findings contribute to the development of criteria for reconstructing metasomatic transformations in mantle rocks based on the infrared spectra and water content of olivines. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
24. Benefits of a digital health technology for older nursing home residents. A de-novo cost-effectiveness model for digital health technologies to aid in the assessment of toileting and containment care needs.
- Author
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Abraham, Katharina, Kanters, Tim Andre, Wagg, Adrian Stuart, Huige, Nicole, Hutt, Edward, and Al, Maiwenn Johanna
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NURSING care facilities ,NURSING home residents ,DIGITAL health ,MEDICAL technology ,TECHNOLOGY assessment ,QUALITY-adjusted life years ,GROUP homes - Abstract
The aim of this study was first, to introduce a comprehensive, de-novo health economic (HE) model incorporating the full range of activities involved in toileting and containment care (T&CC) for people with incontinence, capturing all the potential benefits and costs of existing and future Digital Health Technologies (DHT) aimed at improving continence care, for both residential care and home care. Second, to use this novel model to evaluate the cost-effectiveness of the DHT TENA SmartCare Identifi in the implementation of person-centred continence care (PCCC), compared with conventional continence care for Canadian nursing home residents. The de-novo HE model was designed to evaluate technologies across different care settings from the perspective of several stakeholders. Health states were based on six care need profiles with increasing need for toileting assistance, three care stages with varying degrees of toileting success, and five levels of skin health. The main outcomes were incremental costs and quality-adjusted life years. The effectiveness of the TENA SmartCare Identifi was based primarily on trial data combined with literature and expert opinion where necessary. Costs were reported in CAD 2020. After 2 years, 21% of residents in the DHT group received mainly toileting as their continence care strategy compared with 12% in the conventional care group. Conversely, with the DHT 15% of residents rely mainly on absorbent products for incontinence care, compared with 40% with conventional care. On average, residents lived for 2.34 years, during which the DHT resulted in a small gain in quality-adjusted life years of 0.015 and overall cost-savings of $1,467 per resident compared with conventional care. Most cost-savings were achieved through reduced costs for absorbent products. Since most, if not all, stakeholders gain from use of the DHT-assisted PCCC, widespread use in Canadian residential care facilities should be considered, and similar assessments for other countries encouraged. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
25. Role of Metasomatism in the Development of the East African Rift at the Northern Tanzanian Divergence: Insights From 3D Magnetotelluric Modeling.
- Author
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Özaydın, Sinan, Selway, Kate, Foley, Stephen F., Ezad, Isra S., Griffin, William L., Tarits, Pascal S., and Hautot, Sophie
- Subjects
METASOMATISM ,RIFTS (Geology) ,MAGNETOTELLURIC prospecting ,PLATE tectonics ,ELECTRIC conductivity ,PETROLOGY - Abstract
The Northern Tanzanian Divergence in the East Africa Rift is arguably the best place on Earth to study the controls on rifting of thick lithosphere. Here, where the East Africa Rift intersects the Tanzanian Craton and the Mozambique Belt, the relationships between volcanism, faulting, pre‐existing structures and lithospheric thickness and composition can be observed. In this work, we carry out the first lithospheric‐scale 3D magnetotelluric modeling of the Northern Tanzanian Divergence and combine the results with experimental electrical conductivity and petrology models to calculate mantle composition, which is also inferred in the craton from reanalysis of garnet xenocryst data. Our results show that metasomatic materials exist in the cratonic lithospheric mantle and the relatively undeveloped southern part of the rift zone. However, the lithospheric mantle of the Mozambique Belt and the more developed northern section of the rift is more resistive and does not contain metasomatic phases. Combined with geochemical data from erupted lavas, these results suggest that, in zones that have experienced voluminous Cenozoic magmatism, melting events have destroyed the metasomes and dehydrated the mantle. Since the presence of magma is a primary control of lithospheric strength, rifting may become limited as the lithospheric mantle becomes dehydrated and harder to melt. Plain Language Summary: The motion of tectonic plates relies on a specific set of physical conditions. Continental breakup or rifting occurs when certain parts of the lithosphere are weak, and when stress applied to these regions is sufficient. Weaknesses in the lithosphere rely on its composition and pre‐existing structures. We can image and analyze these features using the magnetotelluric method, a geophysical technique that maps electrical conductivity variations within the Earth. Our results show that compositionally weakening agents (metasomes) play an essential role in the development of the rift by making the mantle easier to melt. We also image some portions of the rift that do not contain such agents, suggesting that melts may have dried out these parts of the lithosphere, leaving a dry and resistive residue. This situation may indicate that melting in the region might be limited in the long run due to the absence of these materials. Key Points: 3D magnetotelluric models of North Tanzanian Divergence are converted to water in mantle models to map metasomatism in the regionMelting events in the Mozambique Belt caused metasomes to be destroyed and the lithospheric mantle to be dehydratedThe rifting in the region might be limited if there is no supply of metasomatic material toward the rift zone [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
26. Is the varying management of incontinence-associated dermatitis due to a lack of understanding of etiology?
- Author
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Porter, Michelle
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TREATMENT of contact dermatitis ,CONTACT dermatitis diagnosis ,CONTACT dermatitis ,RISK assessment ,FECAL incontinence ,EXPERIENCE ,PRESSURE ulcers ,DISEASE risk factors ,ADULTS - Abstract
Incontinence-associated dermatitis, previously and sometimes still referred to as moisture lesions or moisture damage, is a commonly seen contact dermatitis that is a reactive response of the skin to chronic contact to urine and faecal matter. Understanding the etiology is fundamental to creating a skin care plan and successfully prevention. Systemic reviews and studies have shown that the continued variability in management results from a combination of knowledge base, observation, diagnosis, and product selection. This article aims to improve clinicians' understanding of incontinence-associated dermatitis and its management. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. Haut.
- Author
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Teigeler, Brigitte, Staudacher, Diana, Gethin, Georgina, Probst, Sebastian, Weller, Carolina, Kottner, Jan, Beeckman, Dimitri, Peterzelka, Regula, Huhn, Siegfried, Schönberger, Franziska, Bierkamp, Nathalie, Kreße, Heide, Löseke, Eveline, Mauter, Daniel, Paul, Petra, Szallies, Tim, Wolff, Birgit, Vujic, Gabriel, Steudter, Elke, and Fröhlich, Andreas
- Subjects
DERMATOLOGIC nursing ,THERAPEUTICS ,OLDER people ,SKIN diseases ,ANTIFUNGAL agents - Abstract
Copyright of NovaCura is the property of Hogrefe AG and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
28. Thermodynamic and kinetic controls on phase stability and incorporation of water in larnite (β-Ca2SiO4): implications for calcium silicate inclusions in diamonds
- Author
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Gregson, Chris, Brooker, Richard A., Kohn, Simon C., and Lord, Oliver T.
- Published
- 2024
- Full Text
- View/download PDF
29. Pressure-induced large volume collapse and possible spin transition in HP-PdF2-type FeCl2
- Author
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Yao, Yao, Liu, Xi, Du, Xueyan, Zhang, Lili, and Yuan, Hongsheng
- Published
- 2024
- Full Text
- View/download PDF
30. 10 Nursing Interventions for Family Caregivers : Guide to Best Practices in Adult-Gerontology Patient Care
- Author
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Mitzi M. Saunders and Mitzi M. Saunders
- Subjects
- Nursing, Medical personnel-caregiver relationships, Nursing services
- Abstract
This book shines a light on the family caregiver, who cares for their loved one when nurses are not involved. It guides nurses to identify and partner with family caregivers and infuses confidence and desire to support them. The unique feature of this book is to provide nurses with the ability to see themselves in the role of supporting the family caregiver in their own practices with older people. Written in story form with teachable moments interjected within, it develops on the struggles and needs of the family caregiver. This book draws the nurse closer to the family caregiver using empathy, compassion, and competency; it elaborates on best practices to support key interventions that every professional nurse can do. Narrowing to 10 key nursing interventions helps establish the scope of family caregiver nursing care. Much of family caregiver care stems from compassion and “being with” and supporting the patient through difficult times. This is both an art and a skill. This much needed book guides nurses towards the family caregiver, the silent patient.
- Published
- 2024
31. Treatise on Geochemistry
- Abstract
Treatise on Geochemistry, Third Edition, 8 volume set is an invaluable resource for geoscientists and others seeking to understand the origin, evolution, and functioning of our inhabited world, in service of a sustainable future.Our need to understand our planet is being reshaped by two ongoing scientific revolutions: the discovery of thousands of exoplanets and the advent of the Anthropocene. These seemingly disparate revolutions challenge us to deepen our understanding of Earth, as our best path to understanding how inhabited planets work. Geochemical knowledge and discovery are at the heart of this challenge, the crossroads where all geoscience subdisciplines meet – much as chemistry is often said to be the'central science', geochemistry is the'central geoscience'. Treatise on Geochemistry fills the gap between mature and established geochemical knowledge, including analytical developments and the rapidly evolving frontiers of the field. - Provides complete and comprehensive coverage of all aspects of the multi-disciplinary field of geochemistry - Restructured to streamline and consolidate topics and draw explicit connections to the twin revolutions of Astrobiology and the Anthropocene in each volume's introductory chapter - Updates to the new edition include new and expanded coverage of emerging topics like cosmochemistry, planetary geochemistry, and exoplanets - Follows a common template, making the work consistent and easier to navigate
- Published
- 2024
32. Acute and Chronic Wounds - E-Book : Acute and Chronic Wounds - E-Book
- Author
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Ruth Bryant, Denise Nix, Ruth Bryant, and Denise Nix
- Subjects
- Skin--Ulcers--Nursing, Wounds and injuries--Nursing, Surgical wound infections--Nursing, Nursing care plans, Wound healing
- Abstract
Acute & Chronic Wounds, 6th Edition provides the latest diagnostic and treatment guidelines to help novice to expert clinicians provide evidence-based, high-quality care for patients with wounds. This textbook presents an interprofessional approach to maintaining skin integrity and managing the numerous types of skin damage, including topics that range from the physiology of wound healing, general principles of wound management, special patient populations, management of percutaneous tubes, and specific care instructions to program development. Written by respected wound experts Ruth Bryant and Denise Nix, this bestselling reference also provides excellent preparation for all wound certification exams. - Comprehensive approach addresses the prevention and management of acute and chronic wounds, making it the preeminent resource for skin health and wound management across all disciplines involved in wound care, from novice to expert. - Learning Objectives at the beginning of each chapter emphasize the most important content. - Clinical Consult feature in each chapter provides a synthesis of the chapter content, illustrating how to assess, manage, and document a realistic clinical encounter using the ADPIE or SBAR framework. - Checklists provide a concise list of actions necessary to achieve the best patient care outcomes or satisfy a particular objective. - Practical tools and algorithms help in performing risk assessment, differential diagnosis, classification, treatment, and documentation. - Coverage of practice development issues addresses outcomes and productivity in agencies and institutions, home care, acute care, long-term care, and long-term acute care settings. - Self-assessment questions help you test your knowledge and prepare for certification exams. - Helpful appendices provide answers to self-assessment questions, as well as various tools, policies and procedures, competencies, patient and family education guidance, and more. - NEW! Chapters on Postacute Care Settings; Telehealth and Wound Management; Quality Tracking Across the Continuum; and Medications and Phytotherapy: Impact on Wounds provide evidence-based coverage of these important topics. - UPDATED! Consolidated pressure injuries content puts everything you need to know into one chapter. - Expanded full-color insert includes 50 new images — for a total of 95 color plates with more than 160 images — that visually reinforce key concepts. - New information presents the latest developments in biofilm assessment and management, topical oxygen therapy, skin manifestations related to COVID-19, and strategies to enhance engagement, as well as updated product photos and more authors who are clinical experts and providers.
- Published
- 2024
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