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1.
Environ Sci Technol ; 58(5): 2271-2281, 2024 Feb 06.
Artigo em Inglês | MEDLINE | ID: mdl-38270974

RESUMO

To mitigate methane emission from urban natural gas distribution systems, it is crucial to understand local leak rates and occurrence rates. To explore urban methane emissions in cities outside the U.S., where significant emissions were found previously, mobile measurements were performed in 12 cities across eight countries. The surveyed cities range from medium size, like Groningen, NL, to large size, like Toronto, CA, and London, UK. Furthermore, this survey spanned across European regions from Barcelona, ES, to Bucharest, RO. The joint analysis of all data allows us to focus on general emission behavior for cities with different infrastructure and environmental conditions. We find that all cities have a spectrum of small, medium, and large methane sources in their domain. The emission rates found follow a heavy-tailed distribution, and the top 10% of emitters account for 60-80% of total emissions, which implies that strategic repair planning could help reduce emissions quickly. Furthermore, we compare our findings with inventory estimates for urban natural gas-related methane emissions from this sector in Europe. While cities with larger reported emissions were found to generally also have larger observed emissions, we find clear discrepancies between observation-based and inventory-based emission estimates for our 12 cities.


Assuntos
Poluentes Atmosféricos , Gás Natural , Cidades , Gás Natural/análise , Metano/análise , Poluentes Atmosféricos/análise , Londres
2.
Animal ; 17(7): 100867, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37329845

RESUMO

Dietary fibres impact multiple digestive processes, and insights into the effects of various types of fibre on digesta retention time are required to optimise current feed formulation systems. Therefore, the objective of this study was to apply a dynamic modelling approach to generate estimates for the retention time of solid and liquid digesta in broilers fed different fibre sources. A maize-wheat-soybean meal control diet was compared against three diets in which wheat was partially substituted with oat hulls, rice husks, or sugar beet pulp (3% w/w). Non-starch polysaccharide (NSP) digestibility was evaluated in broilers between 23 and 25 days of age (n = 60 birds/treatment) using titanium dioxide (TiO2, 0.5 g/kg) as a marker, after feeding the experimental diets for 21 days. Digesta mean retention time (MRT) was measured in another 108 birds at 30 days of age by the administration of an oral pulse dose of chromium sesquioxide (Cr2O3) as solid marker and Cobalt-EDTA as liquid marker, and subsequent measurement of marker recovery in compartments of the digestive tract (n = 2 or 3 replicate birds/time point/treatment). Marker recovery models to estimate fractional passage rates for solid and liquid digesta in crop, gizzard, small intestine, and caeca compartments of the gastrointestinal tract were developed to predict MRT of solid and liquid digesta for each dietary treatment. The models were composed of a series of first-order differential equations, representing the variation of marker concentration in a compartment over time. Estimated MRT of solid and liquid digesta in the gizzard varied from 20 min for oat hulls and 34 min for rice husks diets to 14 min for sugar beet pulp and 12 min for control diets. In the caeca, liquid MRT was decreased compared to the control diet (989 min) for the sugar beet pulp diet (516 min), while it was increased for both the oat hulls and rice husks diets (≈1 500 min). Overall, these estimates are greater than those previously reported, suggesting that liquid digesta retention in the caeca previously has been underestimated. Digestibility of total NSP was increased by dietary fibre inclusion, regardless of the fibre type, although degradation of constituent sugars of NSP varied among diets. In conclusion, the inclusion of fibre sources at a low level (3% w/w) in the diet of broiler modulated retention time mainly in the gizzard and caeca, and increased digestibility of NSP.


Assuntos
Galinhas , Digestão , Animais , Galinhas/metabolismo , Dieta/veterinária , Trato Gastrointestinal/metabolismo , Fibras na Dieta/metabolismo , Açúcares/metabolismo , Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal
4.
Crit Care Explor ; 4(12): e0808, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36506834

RESUMO

Proliferation of COVID-19 research underscored the need for improved awareness among investigators, research staff and bedside clinicians of the operational details of clinical studies. The objective was to describe the genesis, goals, participation, procedures, and outcomes of two research operations committees in an academic ICU during the COVID-19 pandemic. DESIGN: Two-phase, single-center multistudy cohort. SETTING: University-affiliated ICU in Hamilton, ON, Canada. PATIENTS: Adult patients in the ICU, medical stepdown unit, or COVID-19 ward. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: An interprofessional COVID Collaborative was convened at the pandemic onset within our department, to proactively coordinate studies, help navigate multiple authentic consent encounters by different research staff, and determine which studies would be suitable for coenrollment. From March 2020 to May 2021, five non-COVID trials continued, two were paused then restarted, and five were launched. Over 15 months, 161 patients were involved in 215 trial enrollments, 110 (51.1%) of which were into a COVID treatment trial. The overall informed consent rate (proportion agreed of those eligible and approached including a priori and deferred consent models) was 83% (215/259). The informed consent rate was lower for COVID-19 trials (110/142, 77.5%) than other trials (105/117, 89.7%; p = 0.01). Patients with COVID-19 were significantly more likely to be coenrolled in two or more studies (29/77, 37.7%) compared with other patients (13/84, 15.5%; p = 0.002). Review items for each new study were collated, refined, and evolved into a modifiable checklist template to set up each study for success. The COVID Collaborative expanded to a more formal Department of Critical Care Research Operations Committee in June 2021, supporting sustainable research operations during and beyond the pandemic. CONCLUSIONS: Structured coordination and increased communication about research operations among diverse research stakeholders cultivated a sense of shared purpose and enhanced the integrity of clinical research operations.

5.
Int J Psychophysiol ; 178: 90-98, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35718286

RESUMO

Intolerance of uncertainty is a transdiagnostic risk factor for fear-related disorders and is associated with higher levels of anxiety in children and adolescents. It is unclear how uncertainty relates to development of psychopathology in children who have experienced trauma in early life. The present study used a fear-potentiated startle paradigm in children to examine associations between uncertainty (assessed as unawareness of a change in reinforcement during fear extinction) and symptoms of anxiety and posttraumatic stress disorder (PTSD), as well as startle potentiation to threat and safety cues. Results showed that unaware children had strong positive associations between trauma exposure and PTSD symptoms, whereas aware children did not. Uncertainty interacted with anxiety in that children who were both unaware and had higher anxiety displayed higher fear-potentiated startle to safety cues and did not show discrimination between threat and safety during fear conditioning. These results suggest that anxious children who persist in associating a threat cue with an aversive event during extinction, after repeated presentations of the no longer reinforced conditioned stimulus, may express psychophysiological phenotypes related to PTSD.


Assuntos
Transtornos de Estresse Pós-Traumáticos , Adolescente , Criança , Extinção Psicológica/fisiologia , Medo/fisiologia , Humanos , Transtornos Fóbicos , Reflexo de Sobressalto/fisiologia , Incerteza
6.
J Crit Care ; 71: 154094, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35724443

RESUMO

PURPOSE: To categorize, quantify and interpret findings documented in feedback letters of monitoring or auditing visits for an investigator-initiated, peer-review funded multicenter randomized trial testing probiotics for critically ill patients. MATERIALS & METHODS: In 37 Canadian centers, monitoring and auditing visits were performed by 3 trained individuals; findings were reported in feedback letters. At trial termination, we performed duplicate content analysis on letters, categorizing observations first into unique findings, followed by 10 pre-determined trial quality management domains. We further classified each observation into a) missing operational records, b) errors in process, and potential threats to c) data integrity, d) patient privacy or e) safety. RESULTS: Across 37 monitoring or auditing visits, 75 unique findings were categorized into 10 domains. Most frequently, observations were in domains of training documentation (180/566 [32%]) and the informed consent process (133/566 [23%]). Most observations were missing operational records (438/566 [77%]) rather than errors in process (128/566 [23%]). Of 75 findings, 13 (62/566 observations [11%]) posed a potential threat to data integrity, 1 (1/566 observation [0.18%]) to patient privacy, and 9 (49/566 observations [8.7%]) to patient safety. CONCLUSIONS: Monitoring and auditing findings predominantly concerned missing documentation with minimal threats to data integrity, patient privacy or safety. TRIAL REGISTRATION: PROSPECT (Probiotics: Prevention of Severe Pneumonia and Endotracheal Colonization Trial): NCT02462590.


Assuntos
Consentimento Livre e Esclarecido , Segurança do Paciente , Canadá , Humanos , Estudos Multicêntricos como Assunto
7.
BMJ Open ; 12(1): e058768, 2022 01 19.
Artigo em Inglês | MEDLINE | ID: mdl-35046010

RESUMO

BACKGROUND: Pandemic-related restrictions are expected to continue to shape end-of-life care and impact the experiences of dying hospitalised patients and their families. OBJECTIVE: To understand families' experiences of loss and bereavement during and after the death of their loved one amidst the SARS-CoV-2 (COVID-19) pandemic. DESIGN: Qualitative descriptive study. SETTING: Three acute care units in a Canadian tertiary care hospital. PARTICIPANTS: Family members of 28 hospitalised patients who died from March-July 2020. MAIN OUTCOME MEASURES: Qualitative semistructured interviews conducted 6-16 months after patient death inquired about family experiences before and beyond the death of their loved one and garnered suggestions to improve end-of-life care. RESULTS: Pandemic restrictions had consequences for families of dying hospitalised patients. Most family members described an attitude of acquiescence, some framing their experience as a sacrifice made for the public good. Families appreciated how clinicians engendered trust in the name of social solidarity while trying to mitigate the negative impact of family separation. However, fears about the patient's experience of isolation and changes to postmortem rituals also created despair and contributed to long-lasting grief. CONCLUSION: Profound loss and enduring grief were described by family members whose final connections to their loved one were constrained by pandemic circumstances. Families observed solidarity among clinical staff and experienced a sense of unity with staff, which alleviated some distress. Their suggestions to improve end-of-life care given pandemic restrictions included frequent, flexible communication, exceptions for family presence when safe, and targeted efforts to connect patients whose isolation is intensified by functional impairment or limited technological access. TRIAL REGISTRATION NUMBER: NCT04602520; Results.


Assuntos
Luto , COVID-19 , Canadá , Cuidados Críticos , Família , Pesar , Humanos , Pandemias , Pesquisa Qualitativa , SARS-CoV-2
8.
CMAJ Open ; 9(3): E757-E764, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34285055

RESUMO

BACKGROUND: The 3 Wishes Project (3WP) promotes a personalized dying experience by eliciting and facilitating individualized terminal wishes for patients, families and the clinicians caring for them. We aimed to evaluate the adaptability of the 3WP to a community intensive care unit (ICU), and to describe the patients cared for with this palliative approach, as well as local implementation strategies. METHODS: The 3WP was implemented in a 15-bed community hospital ICU in southern Ontario from 2017 to 2019. In this observational, descriptive study, we invited adult patients (≥ 18 yr) whose risk of death was deemed to be 95% or greater by the attending physician, or patients undergoing withdrawal of life-support to participate. We abstracted patient data from medical records, as well as the type, timing and cost of each wish, which person or service made and facilitated each wish, and if and why wishes were completed or not. We summarized data both narratively and quantitatively. RESULTS: The 3WP helped to realize 479 (99.2%) of 483 terminal wishes for 101 dying patients. This initiative was introduced as an interprofessional intervention and championed by nursing staff who were responsible for most patient enrolment and wish facilitation. Wishes included humanizing the ICU environment for the patient with belongings and blankets, musical performances, smudging and bathing ceremonies, and keepsakes. The cost was $5.39 per patient (standard deviation $22.40), with 430 (89.8%) wishes incurring no cost. Wishes made directly by patients accounted for 30 (6.2%) of wishes; those from family members and ICU staff accounted for 236 (48.9%) and 238 (49.3%) of wishes, respectively. The program comforted patients and their loved ones, motivating clinicians to sustain this end-of-life intervention. INTERPRETATION: We documented successful implementation of the 3WP in a community hospital, showing program adaptability and uptake outside of academic centres at relatively low cost. The lack of strict protocolization and personalized design of this intervention underscores its inherent flexibility, with potential to promote individualized end-of-life care in nonacademic hospital wards, homes or hospice.


Assuntos
Estado Terminal/epidemiologia , Estado Terminal/terapia , Implementação de Plano de Saúde , Assistência Terminal , Feminino , Implementação de Plano de Saúde/estatística & dados numéricos , Humanos , Unidades de Terapia Intensiva , Masculino , Ontário/epidemiologia , Cuidados Paliativos , Assistência Terminal/métodos
9.
Neuroscience ; 468: 149-157, 2021 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-34129912

RESUMO

Our previous work has linked childhood violence exposure in Black youth to functional changes in the hippocampus, a brain region sensitive to stress. However, different contexts of violence exposure (e.g., community, home, school) may have differential effects on circuitry. We investigated the unique effect of community violence in predicting resting-state functional connectivity (rsFC) in the hippocampus. Fifty-two (26F) violence-exposed Black youth ages 8-15 performed resting-state functional neuroimaging scans while looking at a fixation cross for seven minutes with eyes open. Seed-based analyses were conducted to examine the association between total violence exposure and rsFC of the hippocampus to the whole brain. Follow-up hierarchical regression analysis were performed to specifically investigate community violence. Violence exposure was associated with higher hippocampus rsFC with a core node of the Default Mode Network (i.e., posterior cingulate cortex) and lower hippocampal rsFC with a core node of the Salience Network (i.e., insula). Community violence uniquely associated with lower hippocampus-insula rsFC, after controlling for home and school violence, sex and age. Age-related decreases in hippocampus-insula rsFC were also present in youth with lower violence exposure, but not in youth with higher violence exposure. This is one of the first studies to investigate the unique impact of community violence, above home and school violence, on threat circuitry. Our data suggest functional alterations in the hippocampus in violence-exposed youth, and that violence in the community may be a more salient form of threat exposure compared to other forms of violence experienced by youth.


Assuntos
Exposição à Violência , Adolescente , Encéfalo , Córtex Cerebral , Criança , Hipocampo/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética
10.
BMC Health Serv Res ; 21(1): 218, 2021 Mar 10.
Artigo em Inglês | MEDLINE | ID: mdl-33691684

RESUMO

BACKGROUND: Scaling-up and sustaining healthcare interventions can be challenging. Our objective was to describe how the 3 Wishes Project (3WP), a personalized end-of-life intervention, was scaled-up and sustained in an intensive care unit (ICU). METHODS: In a longitudinal mixed-methods study from January 12,013 - December 31, 2018, dying patients and families were invited to participate if the probability of patient death was > 95% or after a decision to withdraw life support. A research team member or bedside clinician learned more about each of the patients and their family, then elicited and implemented at least 3 personalized wishes for patients and/or family members. We used a qualitative descriptive approach to analyze interviews and focus groups conducted with 25 clinicians who cared for the enrolled patients. We used descriptive statistics to summarize patient, wish, and clinician characteristics, and analyzed outcome data in quarters using Statistical Process Control charts. The primary outcome was enrollment of terminally ill patients and respective families; the secondary outcome was the number of wishes per patient; tertiary outcomes included wish features and stakeholder involvement. RESULTS: Both qualitative and quantitative analyses suggested a three-phase approach to the scale-up of this intervention during which 369 dying patients were enrolled, having 2039 terminal wishes implemented. From a research project to clinical program to an approach to practice, we documented a three-fold increase in enrolment with a five-fold increase in total wishes implemented, without a change in cost. Beginning as a study, the protocol provided structure; starting gradually enabled frontline staff to experience and recognize the value of acts of compassion for patients, families, and clinicians. The transition to a clinical program was marked by handover from the research staff to bedside staff, whereby project catalysts mentored project champions to create staff partnerships, and family engagement became more intentional. The final transition involved empowering staff to integrate the program as an approach to care, expanding it within and beyond the organization. CONCLUSIONS: The 3WP is an end-of-life intervention which was implemented as a study, scaled-up into a clinical program, and sustained by becoming integrated into practice as an approach to care.


Assuntos
Cuidados Paliativos na Terminalidade da Vida , Assistência Terminal , Família , Grupos Focais , Humanos , Unidades de Terapia Intensiva
11.
J Intensive Care Med ; 36(4): 404-412, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31960743

RESUMO

PURPOSE: The 3 Wishes Project (3WP) promotes holistic end-of-life care in the intensive care unit (ICU) to honor dying patients, support families, and encourage clinician compassion. Organ donation is a wish that is sometimes made by, or on behalf of, critically ill patients. Our objective was to describe the interface between the 3WP and organ donation as experienced by families, clinicians, and organ donation coordinators. METHODS: In a multicenter evaluation of the 3WP in 4 Canadian ICUs, we conducted a thematic analysis of transcripts from interviews and focus groups with clinicians, organ donation coordinators, and families of dying or died patients for whom donation was considered. RESULTS: We analyzed transcripts from 26 interviews and 2 focus groups with 18 family members, 17 clinicians, and 6 organ donation coordinators. The central theme describes the mutual goals of the 3WP and organ donation-emphasizing personhood and agency across the temporal continuum of care. During family decision-making, conversations encouraged by the 3WP can facilitate preliminary discussions about donation. During preparation for donation, memory-making activities supported by the 3WP redirect focus toward personhood. During postmortem family care, the 3WP supports families, including when donation is unsuccessful, and highlights aspirational pursuits of donation while encouraging reflections on other fulfilled wishes. CONCLUSIONS: Organ donation and the 3WP provide complementary opportunities to engage in value-based conversations during the dying process. The shared values of these programs may help to incorporate organ donation and death into a person's life narrative and incorporate new life into a person's death narrative.


Assuntos
Assistência Terminal , Obtenção de Tecidos e Órgãos , Canadá , Morte , Tomada de Decisões , Família , Humanos , Unidades de Terapia Intensiva
13.
Ann Intern Med ; 174(4): 493-500, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33284683

RESUMO

BACKGROUND: The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has affected the hospital experience for patients, visitors, and staff. OBJECTIVE: To understand clinician perspectives on adaptations to end-of-life care for dying patients and their families during the pandemic. DESIGN: Mixed-methods embedded study. (ClinicalTrials.gov: NCT04602520). SETTING: 3 acute care medical units in a tertiary care hospital from 16 March to 1 July 2020. PARTICIPANTS: 45 dying patients, 45 family members, and 45 clinicians. INTERVENTION: During the pandemic, clinicians continued an existing practice of collating personal information about dying patients and "what matters most," eliciting wishes, and implementing acts of compassion. MEASUREMENTS: Themes from semistructured clinician interviews that were summarized with representative quotations. RESULTS: Many barriers to end-of-life care arose because of infection control practices that mandated visiting restrictions and personal protective equipment, with attendant practical and psychological consequences. During hospitalization, family visits inside or outside the patient's room were possible for 36 patients (80.0%); 13 patients (28.9%) had virtual visits with a relative or friend. At the time of death, 20 patients (44.4%) had a family member at the bedside. Clinicians endeavored to prevent unmarked deaths by adopting advocacy roles to "fill the gap" of absent family and by initiating new and established ways to connect patients and relatives. LIMITATION: Absence of clinician symptom or wellness metrics; a single-center design. CONCLUSION: Clinicians expressed their humanity through several intentional practices to preserve personalized, compassionate end-of-life care for dying hospitalized patients during the SARS-CoV-2 pandemic. PRIMARY FUNDING SOURCE: Canadian Institutes of Health Research and Canadian Critical Care Trials Group Research Coordinator Fund.


Assuntos
Atitude Frente a Morte , COVID-19/epidemiologia , Família/psicologia , Controle de Infecções/organização & administração , Recursos Humanos em Hospital/psicologia , Assistência Terminal/psicologia , Idoso , Empatia , Feminino , Humanos , Masculino , Pandemias , Relações Profissional-Família , SARS-CoV-2
14.
JAMA Netw Open ; 3(12): e2027259, 2020 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-33346843

RESUMO

Importance: Although family members of patients who die in the intensive care unit commonly experience long-term psychological distress, end-of-life bereavement support programs for such relatives are uncommon. Whether art influences the grief experience of families is largely unexplored. Objective: To explore the influence of personalized paintings created to honor deceased critically ill patients on family members' bereavement experience. Design, Setting, and Participants: A qualitative descriptive analysis was conducted of semistructured interviews of grieving relatives who received a painting after the death of their loved one. The deceased patients were from a 21-bed medical-surgical intensive care unit. Eleven families were invited to receive a painting, of whom 1 family declined. A total of 22 family members of 10 patients who died in the intensive care unit were interviewed in the study between July 11, 2017, and May 19, 2019. Interventions: Patients were enrolled in an end-of-life care program that elicits and implements wishes of patients and their families to bring peace during the dying process. Selected families of 10 decedents were invited to receive a painting to honor their loved one 1 to 10 months after the patient's death. Using details about the patient's life story, the artist created individualized paintings to commemorate each patient. Main Outcomes and Measures: The experiences of family members receiving a personalized painting and its reported influence on their grieving experience. Results: The family members of 10 decedents (mean [SD] age, 60 [14] years; 5 women [50%]; 8 White patients [80%]) were interviewed. The central theme of art to facilitate healing was illustrated through the following domains: the cocreation process, painting narratives, postmortem connections, and legacy. The process of cocreating the paintings with the artist and family members involved reminiscing, storytelling, and creativity. Family members emphasized the role of art to facilitate healing, exemplified through connections with images portrayed that deeply resonated with memories of their loved one. Participants indicated that the paintings validated that the patient was remembered, helped families feel less alone during a time of grief, honored the loved one's life, and enhanced connections between family members and clinicians. Conclusions and Relevance: This qualitative study's findings suggest that the creation of personalized paintings commemorating the lives of patients may help foster legacy and postmortem connections with clinicians and may help family members in their healing process.


Assuntos
Atitude Frente a Morte , Luto , Família/psicologia , Pinturas/psicologia , Idoso , Feminino , Humanos , Unidades de Terapia Intensiva , Masculino , Pessoa de Meia-Idade , Ontário , Pesquisa Qualitativa , Assistência Terminal
15.
Am J Crit Care ; 29(6): 422-428, 2020 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-33130860

RESUMO

BACKGROUND: A recent randomized trial of bereaved family members of patients who died in an intensive care unit identified symptoms of depression and posttraumatic stress in recipients of semistructured condolence letters. OBJECTIVES: To explore family member and clinician experiences with receiving or sending handwritten sympathy cards upon the death of patients involved in a personalized end-of-life intervention, the 3 Wishes Project. METHODS: Interviews and focus groups were held with 171 family members and 222 clinicians at 4 centers to discuss their experiences with the 3 Wishes Project. Interview transcripts were searched to identify participants who discussed sympathy cards. Data related to sympathy cards were independently coded by 2 investigators through conventional content analysis. RESULTS: Sympathy cards were discussed during 32 interviews (by 25 family members of 21 patients and by 11 clinicians) and 2 focus groups (8 other clinicians). Family members reported that personalized sympathy cards were a welcome surprise; they experienced them as a heartfelt act of compassion. Clinicians viewed cards as an opportunity to express shared humanity with families, reminding them that they and their loved one were not forgotten. Signing cards allowed clinicians to reminisce individually and collectively with colleagues. Family members and clinicians experienced sympathy cards as a meaningful continuation of care after a patient's death. CONCLUSIONS: Inviting clinicians who cared for deceased patients to offer personalized, handwritten condolences to bereaved family members may cultivate sincere and individualized expressions of sympathy that bereaved families appreciate after the death of patients involved in the 3 Wishes Project.


Assuntos
Luto , Relações Profissional-Família , Família , Humanos , Unidades de Terapia Intensiva , Assistência Terminal
16.
J Dairy Sci ; 103(12): 11375-11385, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32981733

RESUMO

Supplementing a diet with nitrate is regarded as an effective and promising methane (CH4) mitigation strategy by competing with methanogens for available hydrogen through its reduction of ammonia in the rumen. Studies have shown major reductions in CH4 emissions with nitrate supplementation, but with large variation in response. The objective of this study was to quantitatively investigate the effect of dietary nitrate on enteric CH4 production and yield and evaluate the variables with high potential to explain the heterogeneity of between-study variability using meta-analytical models. A data set containing 56 treatments from 24 studies was developed to conduct a meta-analysis. Dry matter (DM) intake, nitrate dose (g/kg of DM), animal body weight, roughage proportion of diet, dietary crude protein and neutral detergent fiber content, CH4 measurement technique, and type of cattle (beef or dairy) were considered as explanatory variables. Average DM intake and CH4 production for dairy cows (16.2 ± 2.93 kg/d; 311 ± 58.8 g/d) were much higher than for beef cattle (8.1 ± 1.57 kg/d; 146 ± 50.9 g/d). Therefore, a relative mean difference was calculated and used to conduct random-effect and mixed-effect model analysis to eliminate the large variations between types of animal due to intake. The final mixed-effect model for CH4 production (g of CH4/d) had 3 explanatory variables and included nitrate dose, type of cattle, and DM intake. The final mixed-effect model for CH4 yield (g of CH4/kg of DM intake) had 2 explanatory variables and included nitrate dose and type of cattle. Nitrate effect sizes on CH4 production (dairy: -20.4 ± 1.89%; beef: -10.1 ± 1.52%) and yield (dairy: -15.5 ± 1.15%; beef: -8.95 ± 1.764%) were significantly different between the 2 types of cattle. When data from slow-release nitrate sources were removed from the analysis, there was no significant difference in type of cattle anymore for CH4 production and yield. Nitrate dose enhanced the mitigating effect of nitrate on CH4 production and yield by 0.911 ± 0.1407% and 0.728 ± 0.2034%, respectively, for every 1 g/kg of DM increase from its mean dietary inclusion (16.7 g/kg of DM). An increase of 1 kg of DM/d in DM intake from its mean dietary intake (11.1 kg of DM/d) decreased the effect of nitrate on CH4 production by 0.691 ± 0.2944%. Overall, this meta-analysis demonstrated that nitrate supplementation reduces CH4 production and yield in a dose-dependent manner, and that elevated DM intake decreases the effect of nitrate supplementation on CH4 production. Furthermore, the stronger antimethanogenic effect on CH4 production and yield in dairy cows than in beef steers could be related to use of slow-release nitrate in beef cattle.


Assuntos
Bovinos/metabolismo , Metano/biossíntese , Nitratos/administração & dosagem , Amônia/metabolismo , Animais , Peso Corporal , Doenças dos Bovinos/metabolismo , Dieta/veterinária , Fibras na Dieta/administração & dosagem , Fibras na Dieta/metabolismo , Suplementos Nutricionais , Feminino , Leite/metabolismo , Rúmen/efeitos dos fármacos , Rúmen/metabolismo
17.
Crit Care Med ; 48(10): 1403-1410, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32796181

RESUMO

OBJECTIVES: To describe the importance of critical care clinical research that is not pandemic-focused during pandemic times; outline principles to assist in the prioritization of nonpandemic research during pandemic times; and propose a guiding framework for decisions about whether, when and how to continue nonpandemic research while still honoring the moral and scientific imperative to launch research that is pandemic-focused. DESIGN/DATA SOURCES: Using in-person, email, and videoconference exchanges, we convened an interprofessional clinical research group, conducted a literature review of empirical studies, ethics documents and expert commentaries (2010 to present), and viewed traditional and social media posts (March 2020 to May 2020). Stakeholder consultation involved scientific, ethics, clinical, and administrative leaders. SETTING: Clinical research in the ICU. PATIENTS: Patients with and without coronavirus disease 2019. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: While clinical research should be prioritized to advantage patients with coronavirus disease 2019 in order to care for affected patients, it ideally would not unduly disadvantage patients without coronavirus disease 2019. Thus, timely, rigorous, relevant, and ethical clinical research is needed to improve the care and optimize outcomes for both patients with and without coronavirus disease 2019, acknowledging how many studies that are not exclusively focused on coronavirus disease 2019 remain relevant to patients with coronavirus disease 2019. Considerations to continue nonpandemic-focused research include the status of the pandemic, local jurisdictional guidance, capacity and safety of bedside and research personnel, disposition of patients already enrolled in nonpandemic studies, analyzing characteristics of each nonpandemic-focused study, research oversight, and final reporting requirements. CONCLUSIONS: Deliberation about continuing nonpandemic research should use objective, transparent criteria considering several aspects of the research process such as bedside and research staff safety, infection control, the informed consent model, protocol complexity, data collection, and implementation integrity. Decisions to pause or pursue nonpandemic research should be proportionate, transparent, and revisited as the pandemic abates.


Assuntos
Pesquisa Biomédica/organização & administração , Infecções por Coronavirus/epidemiologia , Cuidados Críticos/normas , Pandemias/estatística & dados numéricos , Pneumonia Viral/epidemiologia , Guias de Prática Clínica como Assunto , COVID-19 , Infecções por Coronavirus/prevenção & controle , Estado Terminal/mortalidade , Estado Terminal/terapia , Feminino , Saúde Global , Humanos , Controle de Infecções/normas , Masculino , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , Projetos de Pesquisa , Gestão da Segurança
18.
BMC Palliat Care ; 19(1): 93, 2020 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-32605623

RESUMO

BACKGROUND: The 3 Wishes Project (3WP) is an end-of-life program that honors the dignity of dying patients by fostering meaningful connections among patients, families, and clinicians. Since 2013, it has become embedded in the culture of end-of-life care in over 20 ICUs across North America. The purpose of the current study is to describe the variation in implementation of 3WP across sites, in order to ascertain which factors facilitated multicenter implementation, which factors remain consistent across sites, and which may be adapted to suit local needs. METHODS: Using the methodology of qualitative description, we collected interview and focus group data from 85 clinicians who participated in the successful initiation and sustainment of 3WP in 9 ICUs. We describe the transition between different models of 3WP implementation, from core clinical program to the incorporation of various research activities. We describe various sources of financial and in-kind resources accessed to support the program. RESULTS: Beyond sharing a common goal of improving end-of-life care, sites varied considerably in organizational context, staff complement, and resources. Despite these differences, the program was successfully implemented at each site and eventually evolved from a clinical or research intervention to a general approach to end-of-life care. Key to this success was flexibility and the empowerment of frontline staff to tailor the program to address identified needs with available resources. This adaptability was fueled by cross-pollination of ideas within and outside of each site, resulting in the establishment of a network of like-minded individuals with a shared purpose. CONCLUSIONS: The successful initiation and sustainment of 3WP relied on local adaptations to suit organizational needs and resources. The semi-structured nature of the program facilitated these adaptations, encouraged creative and important ways of relating within local clinical cultures, and reinforced the main tenet of the program: meaningful human connection at the end of life. Local adaptations also encouraged a team approach to care, supplementing the typical patient-clinician dyad by explicitly empowering the healthcare team to collectively recognize and respond to the needs of dying patients, families, and each other. TRIAL REGISTRATION: NCT04147169 , retrospectively registered with clinicaltrials.gov on October 31, 2019.


Assuntos
Empatia , Assistência Terminal/normas , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pesquisa Qualitativa , Assistência Terminal/métodos , Assistência Terminal/tendências
19.
Palliat Med ; 34(9): 1263-1273, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32519615

RESUMO

BACKGROUND: The 3 Wishes Project is a semistructured program that improves the quality of care for patients dying in the intensive care unit by eliciting and implementing wishes. This simple intervention honors the legacy of patients and eases family grief, forging human connections between family members and clinicians. AIM: To examine how the 3 Wishes Project enables collective patterns of compassion between patients, families, clinicians, and managerial leaders in the intensive care unit. DESIGN: Using a qualitative descriptive approach, interviews and focus groups were used to collect data from family members of dying patients, clinicians, and institutional leaders. Unconstrained directed qualitative content analysis was performed using Organizational Compassion as the analytic framework. SETTING/PARTICIPANTS: Four North American intensive care units, participants were 74 family members of dying patients, 72 frontline clinicians, and 20 managerial leaders. RESULTS: The policies and processes of the 3 Wishes Project exemplify organizational compassion by supporting individuals in the intensive care unit to collectively notice, feel, and respond to suffering. As an intervention that enables and empowers clinicians to engage in acts of kindness to enhance end-of-life care, the 3 Wishes Project is particularly well situated to encourage collective responses to suffering and promote compassion between patients, family members, and clinicians. CONCLUSIONS: Examining the 3 Wishes Project through the lens of organizational compassion reveals the potential of this program to cultivate the capacity for people to collectively notice, feel, and respond to suffering. Our data document multidirectional demonstrations of compassion between clinicians and family members, forging the type of human connections that may foster resilience.


Assuntos
Empatia , Unidades de Terapia Intensiva , Assistência Terminal , Família , Grupos Focais , Humanos , Unidades de Terapia Intensiva/tendências , Assistência Terminal/métodos , Assistência Terminal/psicologia
20.
Ann Intern Med ; 172(1): 1-11, 2020 01 07.
Artigo em Inglês | MEDLINE | ID: mdl-31711111

RESUMO

Background: The 3 Wishes Project (3WP) is an end-of-life program that aims to honor the dignity of dying patients by creating meaningful patient- and family-centered memories while promoting humanistic interprofessional care. Objective: To determine whether this palliative intervention could be successfully implemented-defined as demonstrating value, transferability, affordability, and sustainability-beyond the intensive care unit in which it was created. Design: Mixed-methods formative program evaluation. (ClinicalTrials.gov: NCT04147169). Setting: 4 North American intensive care units. Participants: Dying patients, their families, clinicians, hospital managers, and administrators. Intervention: Wishes from dying patients, family members, and clinicians were elicited and implemented. Measurements: Patient characteristics and processes of care; the number, type, and cost of each wish; and semistructured interviews and focus groups with family members, clinicians, and managers. Results: A total of 730 patients were enrolled, and 3407 wishes were elicited. Qualitative data were gathered from 75 family members, 72 clinicians, and 20 managers or hospital administrators. Value included intentional comforting of families as they honored the lives and legacies of their loved ones while inspiring compassionate clinical care. Factors promoting transferability included family appreciation and a collaborative intensive care unit culture committed to dignity-conserving end-of-life care. Staff participation evolved from passive support to professional agency. Program initiation required minimal investment for reusable materials; thereafter, the mean cost was $5.19 (SD, $17.14) per wish. Sustainability was demonstrated by the continuation of 3WP at each site after study completion. Limitation: This descriptive formative evaluation describes tertiary care center-specific experiences rather than aiming for generalizability to all jurisdictions. Conclusion: The 3WP is a transferrable, affordable, and sustainable program that provides value to dying patients, their families, clinicians, and institutions. Primary Funding Source: Greenwall Foundation.


Assuntos
Empatia , Assistência Terminal , Família/psicologia , Feminino , Grupos Focais , Humanos , Unidades de Terapia Intensiva , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Desenvolvimento de Programas , Avaliação de Programas e Projetos de Saúde , Assistência Terminal/métodos , Assistência Terminal/organização & administração
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