Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
2.
Can J Kidney Health Dis ; 4: 2054358117703985, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28491339

RESUMO

BACKGROUND: Acute kidney injury (AKI) is associated with increased mortality and dialysis in hospitalized patients but has been little explored in the emergency department (ED) setting. OBJECTIVE: The objective of this study was to describe the risk factors, prevalence, management, and outcomes in the ED population, and to identify the proportion of AKI patients who were discharged home with no renal-specific follow-up. DESIGN: This is a retrospective cohort study using administrative and laboratory databases. SETTING: Two urban EDs in Vancouver, British Columbia, Canada. PATIENTS: We included all unique ED patients over a 1-week period. METHODS: All patients had their described demographics, comorbidities, medications, laboratory values, and ED treatments collected. AKI was defined pragmatically, based upon accepted guidelines. The cohort was then probabilistically linked to the provincial renal database to ascertain renal replacement (transplant or dialysis) and the provincial vital statistics database to obtain mortality. The primary outcome was the prevalence of AKI; secondary outcomes included (1) the proportion of AKI patients who were discharged home with no renal-specific follow-up and (2) the combined 30-day rate of death or renal replacement among AKI patients. RESULTS: There were 1651 ED unique patients, and 840 had at least one serum creatinine (SCr) obtained. Overall, 90 patients had AKI (10.7% of ED patients with at least one SCr, 95% confidence interval [CI], 8.7%-13.1%; 5.5% of all ED patients, 95% CI, 4.4%-6.7%) with a median age of 74 and 70% male. Of the 31 (34.4%) AKI patients discharged home, 4 (12.9%) had renal-specific follow-up arranged in the ED. Among the 90 AKI patients, 11 died and none required renal replacement at 30 days, for a combined outcome of 12.2% (95% CI, 6.5%-21.2%). LIMITATIONS: Sample sizes may be small. Nearly half of ED patients did not obtain an SCr. Many patients did not have sequential SCr testing, and a modified definition of AKI was used.


MISE EN CONTEXTE: L'insuffisance rénale aiguë (IRA) est associée à une mortalité accrue et à un recours plus fréquent à l'hémodialyse chez les patients hospitalisés. Toutefois, l'IRA a très peu été étudiée dans le cadre du service des urgences. OBJECTIF DE L'ÉTUDE: Dresser le portrait des facteurs de risque, de la prévalence, de la prise en charge et des conséquences de l'IRA au sein d'une population de patients admis aux urgences. Établir la proportion de patients atteints d'IRA qui ont par la suite été renvoyés à la maison sans aucun suivi en néphrologie. MODÈLE D'ÉTUDE: Il s'agit d'une étude de cohorte rétrospective menée à partir des bases de données administratives et de laboratoire des hôpitaux concernés. CADRE DE L'ÉTUDE: L'étude s'est tenue dans deux services d'urgence de Vancouver (CB) au Canada. PARTICIPANTS: Nous avons inclus tous les patients ayant été admis aux urgences au cours d'une période d'une semaine. MÉTHODOLOGIE: Les données démographiques, les comorbidités, la liste des médicaments prescrits, les résultats de laboratoire et les traitements administrés lors du séjour aux urgences ont été colligés pour chacun des participants. L'IRA a été définie avec pragmatisme, conformément aux lignes directrices acceptées. La cohorte a ensuite été couplée de façon probabiliste à la base de données provinciale sur l'insuffisance rénale afin d'évaluer l'incidence de thérapies de remplacement rénal (dialyse ou greffe) et la base de données statistique provinciale pour obtenir le taux de mortalité. Le critère de jugement principal était la prévalence de l'IRA ; les critères de jugement secondaires incluaient la proportion de patients atteints d'IRA retournés à la maison sans prescription de suivi en santé rénale ainsi que le taux combiné de mortalité ou d'établissement d'une thérapie de remplacement rénal à l'intérieur de 30 jours chez ces mêmes patients. RÉSULTATS: Au total, 1 651 patients se sont présentés aux urgences au cours de la période étudiée. Au moins une mesure de la créatinine sérique (SCr) avait été effectuée pour 840 d'entre eux. Dans l'ensemble, 90 patients souffraient effectivement d'IRA, (10,7% des patients avec au moins une mesure de SCr [IC à 95%: 8,7 à 13,1%] ; 5,5% de tous les patients [IC à 95%: 4,4 à 6,7%]). Il s'agissait de patients majoritairement de sexe masculin (70%) et leur âge médian était de 74 ans. Des 31 patients souffrant d'IRA (34,4%) retournés à la maison, on a prévu un suivi en santé rénale pour seulement quatre (12,9%) d'entre eux pendant leur séjour aux urgences. Parmi les 90 patients souffrant d'IRA, 11 sont décédés et aucun n'a eu besoin d'une thérapie de remplacement de la fonction rénale dans les 30 jours suivant la visite aux urgences, ce qui représente un résultat combiné de 12,2% (IC à 95%: 6,5 à 21,2%). LIMITES DE L'ÉTUDE: Le faible échantillonnage et le fait qu'aucune mesure de la SCr n'ait été effectuée pour près de la moitié des patients ayant séjourné aux urgences. De plus, plusieurs patients pour qui on avait procédé à une mesure de la SCr n'ont pas eu de mesure séquentielle, et une définition modifiée de l'insuffisance rénale a été utilisée pour réaliser l'étude.

3.
J Telemed Telecare ; 22(4): 244-51, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26199276

RESUMO

BACKGROUND: Small emergency departments (EDs) may rely on radiologists at remote centers for interpretations of chest radiographs (CXRs). We investigated systematic transmission of CXR images from a small ED to a geographically remote referral center using the mobile BlackBerry Messenger (BBM) application. METHODS: Investigators obtained de-identified CXR images of consecutive ED patients via mobile phone camera. Each CXR image, along with a brief clinical history, was sent via BBM to an emergency physician located at a remote referral site, and the receiving physician replied via BBM to confirm reception. All communications, image generation, and image analysis was conducted on mobile phones. The primary outcome was the proportion of BBMs received within two minutes of sending; the secondary outcome was the proportion of BBM replies to the sending physician within five minutes. Image accuracy-comparing the radiologist's interpretation with the receiving emergency physician's interpretation-was estimated using predefined criteria. RESULTS: Of 1281 consecutive ED patients, 231 (18.0 %) had CXRs obtained, 320 CXRs were analyzed and 611 BBMs sent. All BBMs (100.0%, 95% confidence interval (CI) 99.4-00.0) arrived within two minutes; 595 BBMs (97.4%, 95% CI 95.8-98.4) were replied to within five minutes. Of the 58 CXRs with abnormalities requiring intervention, there were 55 concordances (overall agreement 94.2%, 95% CI 85.9-98.3; kappa 0.95, 95% CI 0.89-1.0) CONCLUSION: Systematic transmission of CXR images from a small ED to a remote large center using mobile phones may be a safe and effective strategy to rapidly communicate important patient information.


Assuntos
Aplicativos Móveis , Radiografia Torácica/métodos , Consulta Remota/métodos , Telerradiologia/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Colúmbia Britânica , Telefone Celular , Criança , Pré-Escolar , Serviço Hospitalar de Emergência , Feminino , Hospitais Comunitários , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Envio de Mensagens de Texto , Adulto Jovem
4.
Blood ; 112(3): 560-7, 2008 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-18502833

RESUMO

Hematopoietic stem cells (HSCs) regenerated in vivo display sustained differences in their self-renewal and differentiation activities. Variations in Steel factor (SF) signaling are known to affect these functions in vitro, but the cellular and molecular mechanisms involved are not understood. To address these issues, we evaluated highly purified HSCs maintained in single-cell serum-free cultures containing 20 ng/mL IL-11 plus 1, 10, or 300 ng/mL SF. Under all conditions, more than 99% of the cells traversed a first cell cycle with similar kinetics. After 8 hours in the 10 or 300 ng/mL SF conditions, the frequency of HSCs remained unchanged. However, in the next 8 hours (ie, 6 hours before any cell divided), HSC integrity was sustained only in the 300 ng/mL SF cultures. The cells in these cultures also contained significantly higher levels of Bmi1, Lnk, and Ezh2 transcripts but not of several other regulators. Assessment of 21 first division progeny pairs further showed that only those generated in 300 ng/mL SF cultures contained HSCs and pairs of progeny with similar differentiation programs were not observed. Thus, SF signaling intensity can directly and coordinately alter the transcription factor profile and long-term repopulating ability of quiescent HSCs before their first division.


Assuntos
Células-Tronco Hematopoéticas/efeitos dos fármacos , Fator de Células-Tronco/farmacologia , Proteínas Adaptadoras de Transdução de Sinal , Animais , Ciclo Celular/efeitos dos fármacos , Células Cultivadas , Relação Dose-Resposta a Droga , Proteína Potenciadora do Homólogo 2 de Zeste , Transplante de Células-Tronco Hematopoéticas , Células-Tronco Hematopoéticas/citologia , Histona-Lisina N-Metiltransferase , Peptídeos e Proteínas de Sinalização Intracelular , Cinética , Proteínas de Membrana , Camundongos , Proteínas Nucleares/genética , Complexo Repressor Polycomb 1 , Complexo Repressor Polycomb 2 , Proteínas/genética , Proteínas Proto-Oncogênicas/genética , RNA Mensageiro/análise , Proteínas Repressoras/genética
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...