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1.
Prehosp Emerg Care ; 28(1): 154-159, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-37494278

RESUMEN

BACKGROUND: Prehospital post-resuscitation hypotension and hypoxia have been associated with adverse outcomes in the context of out-of-hospital cardiac arrest (OHCA). We aimed to investigate the association between clinical outcomes and post-resuscitation hypoxia alone, hypotension alone, and combined hypoxia and hypotension. METHODS: We used the 2018-2021 ESO annual datasets to conduct this study. All EMS-treated non-traumatic OHCA patients who had a documented prehospital return of spontaneous circulation (ROSC) and two or more SpO2 readings and systolic blood pressures recorded were evaluated for inclusion. Patients who were less than 18 years of age, pregnant, had a do-not-resuscitate order or similar, achieved ROSC after bystander CPR only, or had an EMS-witnessed cardiac arrest were excluded. Multivariable logistic regression adjusted for standard Utstein factors and highest prehospital Glasgow Coma Scale (GCS) score was used to investigate the association between hypoxia, hypotension, and outcomes. RESULTS: We analyzed data for 17,943 patients, of whom 3,979 had hospital disposition data. Hypotension and hypoxia were not documented in 1,343 (33.8%) patients, 1,144 (28.8%) had only hypoxia documented, 507 (12.7%) had only hypotension documented, and 985 (24.8%) had both hypoxia and hypotension documented. In comparison to patients who did not have documented hypotension or hypoxia, patients who had documented hypoxia (aOR: 1.76 [1.38, 2.24]), documented hypotension (aOR: 3.00 [2.15, 4.18]), and documented hypoxia and hypotension combined (aOR: 4.87 [3.63, 6.53]) had significantly increased mortality. The relationship between mortality and vital sign abnormalities (hypoxia and hypotension > hypotension > hypoxia) was observed in every evaluated subgroup. CONCLUSIONS: In this large dataset, hypotension and hypoxia were independently associated with mortality both alone and in combination. Compared to patients without documented hypotension and hypoxia, patients with documented hypotension and hypoxia had nearly five-fold greater odds of mortality.


Asunto(s)
Reanimación Cardiopulmonar , Servicios Médicos de Urgencia , Hipotensión , Paro Cardíaco Extrahospitalario , Humanos , Recolección de Datos , Hipotensión/epidemiología , Hipotensión/etiología
2.
Semergen ; 50(1): 102086, 2024.
Artículo en Español | MEDLINE | ID: mdl-37832165

RESUMEN

Logistic regression is a group of statistical techniques that aim to test hypotheses or causal relationships between a categorical dependent variable and other independent variables that can be categorical and quantitative. Through this model we intend to study the probability that the event studied will occur based on some variables that we assume are relevant or influential. In this method it is necessary to detect effect modifier and confounding variables. Its parameters are estimated with the maximum likelihood method through a process with successive iterations.


Asunto(s)
Modelos Logísticos , Humanos , Estudios Retrospectivos
3.
Resuscitation ; 198: 110201, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38582437

RESUMEN

INTRODUCTION: Epinephrine and norepinephrine are the two most commonly used prehospital vasopressors in the United States. Prior studies have suggested that use of a post-ROSC epinephrine infusion may be associated with increased rearrest and mortality in comparison to use of norepinephrine. We used target trial emulation methodology to compare the rates of rearrest and mortality between the groups of OHCA patients receiving these vasopressors in the prehospital setting. METHODS: Adult (18-80 years of age) non-traumatic OHCA patients in the 2018-2022 ESO Data Collaborative datasets with a documented post-ROSC norepinephrine or epinephrine infusion were included in this study. Logistic regression modeling was used to evaluate the association between vasopressor agent and outcome using two sets of covariables. The first set of covariables included standard Utstein factors, the dispatch to ROSC interval, the ROSC to vasopressor interval, and the follow-up interval. The second set added prehospital systolic blood pressure and SpO2 values. Kaplan-Meier time-to-event analysis was also conducted and the vasopressor groups were compared using a multivariable Cox regression model. RESULTS: Overall, 1,893 patients treated by 309 EMS agencies were eligible for analysis. 1,010 (53.4%) received an epinephrine infusion and 883 (46.7%) received a norepinephrine infusion as their initial vasopressor. Adjusted analyses did not discover an association between vasopressor agent and rearrest (aOR: 0.93 [0.72, 1.21]) or mortality (aOR: 1.00 [0.59, 1.69]). CONCLUSIONS: In this multi-agency target trial emulation, the use of a post-resuscitation epinephrine infusion was not associated with increased odds of rearrest in comparison to the use of a norepinephrine infusion.


Asunto(s)
Epinefrina , Norepinefrina , Paro Cardíaco Extrahospitalario , Vasoconstrictores , Humanos , Epinefrina/administración & dosificación , Vasoconstrictores/administración & dosificación , Vasoconstrictores/uso terapéutico , Norepinefrina/administración & dosificación , Norepinefrina/uso terapéutico , Masculino , Femenino , Persona de Mediana Edad , Estudios Retrospectivos , Anciano , Paro Cardíaco Extrahospitalario/terapia , Paro Cardíaco Extrahospitalario/mortalidad , Paro Cardíaco Extrahospitalario/tratamiento farmacológico , Adulto , Reanimación Cardiopulmonar/métodos , Servicios Médicos de Urgencia/métodos , Anciano de 80 o más Años , Estados Unidos/epidemiología , Adolescente , Adulto Joven
4.
Resuscitation ; 196: 110135, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38331343

RESUMEN

INTRODUCTION: Following initial resuscitation from out-of-hospital cardiac arrest, rearrest frequently occurs and has been associated with adverse outcomes. We aimed to identify clinical, treatment, and demographic characteristics associated with prehospital rearrest at the encounter and agency levels. METHODS: Adult non-traumatic cardiac arrest patients who achieved ROSC following EMS resuscitation in the 2018-2021 ESO annual datasets were included in this study. Patients were excluded if they had a documented DNR/POLST or achieved ROSC after bystander CPR only. Rearrest was defined as post-ROSC CPR initiation, administration of ≥ 1 milligram of adrenaline, defibrillation, or a documented non-perfusing rhythm on arrival at the receiving hospital. Multivariable logistic regression modeling was used to evaluate the association between rearrest and case characteristics. Linear regression modeling was used to evaluate the association between agency-level factors (ROSC rate, scene time, and scene termination rate), and rearrest rate. RESULTS: Among the 53,027 cases included, 16,116 (30.4%) experienced rearrest. Factors including longer response intervals, longer 'low-flow' intervals, unwitnessed OHCA, and a lack of bystander CPR were associated with rearrest. Among agencies that treated ≥ 30 patients with outcome data, the agency-level rate of rearrest was inversely associated with agency-level rate of survival to discharge to home (R2 = -0.393, p < 0.001). CONCLUSIONS: This multiagency retrospective study found that factors associated with increased ischaemic burden following OHCA were associated with rearrest. Agency-level rearrest frequency was inversely associated with agency-level survival to home. Interventions that decrease the burden of ischemia sustained by OHCA patients may decrease the rate of rearrest and increase survival.


Asunto(s)
Paro Cardíaco Extrahospitalario , Resucitación , Adulto , Humanos , Estudios Retrospectivos , Cognición , Paro Cardíaco Extrahospitalario/etiología , Paro Cardíaco Extrahospitalario/terapia , Demografía
5.
Semergen ; 49(3): 101907, 2023 Apr.
Artículo en Español | MEDLINE | ID: mdl-36577284

RESUMEN

The intraclass correlation coefficient makes it possible to measure the general concordance between two or more measurements that involve variables of a quantitative nature, obtained with different measuring instruments or evaluators. It is based on an analysis of variance model with repeated measures. Its use is only possible if there is normality of the distributions of the variables, equality of variances and independence between the errors produced by the observers.

6.
Semergen ; 49(1): 101821, 2023.
Artículo en Español | MEDLINE | ID: mdl-36155265

RESUMEN

The ROC curve is a statistical tool used to evaluate the discriminative capacity of a dichotomous diagnostic test. These are curves in which sensitivity is presented as a function of false positives (complementary to specificity) for different cut-off points. They are useful for choosing the most appropriate cut-off point for a test, knowing its overall performance and comparing the discriminative capacity of 2 or more diagnostic tests.


Asunto(s)
Curva ROC , Humanos , Sensibilidad y Especificidad
7.
Resuscitation ; 188: 109812, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37120129

RESUMEN

OBJECTIVE: Supraglottic airway devices are increasingly used during the resuscitation of out-of-hospital cardiac arrest (OHCA) patients in the United States and worldwide. In this study, we aimed to compare the neurologic outcomes of OHCA patients managed with the King Laryngeal Tube (King LT) to the neurologic outcomes of patients managed with the iGel. METHODS: We used the Cardiac Arrest Registry to Enhance Survival (CARES) public use research dataset for our analysis. Non-traumatic OHCA cases with attempted EMS resuscitation enrolled from 2013-2021 were included. We used two-level mixed effects multivariable logistic regression analyses with treating EMS agency as the random effect to determine the association between supraglottic airway device and outcome. The primary outcome was survival with a Cerebral Performance Category (CPC) score of 1 or 2 at discharge. Secondary outcomes included survival to hospital admission and survival to hospital discharge. Age, sex, calendar year of OHCA, initial ECG rhythm, witnessed status (unwitnessed, bystander witnessed, 9-1-1 responder witnessed), bystander CPR, response interval, and OHCA location (private/home, public, institutional) were used as covariables. RESULTS: In comparison to use of the King LT, use of the iGel was associated with greater neurologically favorable survival (aOR: 1.45 [1.33, 1.58]). In addition, use of the iGel was associated with greater survival to hospital admission (1.07 [1.02, 1.12]) and survival to hospital discharge (1.35 [1.26, 1.46]). CONCLUSIONS: This study adds to the body of literature suggesting that use of the iGel during OHCA resuscitation is associated with better outcomes than use of the King LT.


Asunto(s)
Reanimación Cardiopulmonar , Servicios Médicos de Urgencia , Paro Cardíaco Extrahospitalario , Humanos , Intubación Intratraqueal , Estudios Retrospectivos , Resultado del Tratamiento , Paro Cardíaco Extrahospitalario/terapia , Sistema de Registros
8.
Disaster Med Public Health Prep ; 16(5): 1990-1996, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34523397

RESUMEN

OBJECTIVE: We sought to determine who is involved in the care of a trauma patient. METHODS: We recorded hospital personnel involved in 24 adult Priority 1 trauma patient admissions for 12 h or until patient demise. Hospital personnel were delineated by professional background and role. RESULTS: We cataloged 19 males and 5 females with a median age of 50-y-old (interquartile range [IQR], 35.5-67.5). The average number of hospital personnel involved was 79.71 (standard deviation, 17.62; standard error 3.6). A median of 51.2% (IQR, 43.4%-59.8%) of personnel were first involved within hour 1. More personnel were involved in direct versus indirect care (median 54.5 [IQR, 47.5-67.0] vs 25.0 [IQR, 22.0-30.5]; P < 0.0001). Median number of health-care professionals and auxiliary staff were 74.5 (IQR, 63.5-90.5) and 6.0 (IQR, 5.0-7.0), respectively. More personnel were first involved in hospital locations external to the emergency department (median, 53.0 [IQR, 41.5-63.0] vs 27.5 [IQR, 24.0-30.0]; P < 0.0001). No differences existed in total personnel by Injury Severity Score (P = 0.1266), day (P = 0.7270), or time of admission (P = 0.2098). CONCLUSIONS: A large number of hospital personnel with varying job responsibilities respond to severe trauma. These data may guide hospital staffing and disaster preparedness policies.


Asunto(s)
Planificación en Desastres , Incidentes con Víctimas en Masa , Adulto , Masculino , Femenino , Humanos , Centros Traumatológicos , Servicio de Urgencia en Hospital , Recursos Humanos
9.
Semergen ; 47(4): 230-239, 2021.
Artículo en Español | MEDLINE | ID: mdl-33863649

RESUMEN

OBJECTIVES: To know the percentage of adolescent patients at risk of developing an eating disorder (ED); to identify the prevalence of risk for Anorexia Nervosa, Bulimia Nervosa and Unspecified Eating Disorders (NERD) according to age, sex, health centers, nationality and family data; determine the percentage of young people with subclinical forms and study the feasibility of using tools for the early detection of this pathology in Primary Care. MATERIAL AND METHODS: Observational, cross-sectional and multicentre study developed in the five health centers of the city of Guadalajara. Sample of 291 adolescents (124 males and 167 females) obtained through stratified, multi-stage and proportional random sampling according to age, sex and health centers. Sociodemographic, anthropometric and family variables were studied and the EAT-26, SCOFF and EDE-Q6.0 tests were applied in the first round and the EDE-12 interview in the second round. RESULTS: The global prevalence of risk of eating disorders was 17.5% (95% CI: 13.7%-19.4%). The variables, having siblings, being single-parent and having obesity were statistically significant. Among the various types of EDs, the NERD were statistically significant with respect to Anorexia and Bulimia. The subscale concern for the silhouette was statistically significant with respect to the others. The SCOFF questionnaire showed a sensitivity of 91.6% and a specificity of 91.0% and the EDE-Q, 99.3% and 91.7% respectively. CONCLUSIONS: High percentage of adolescents at risk of developing an eating disorder. The unspecified type of eating disorders and the concern for the silhouette subscale predominate. The SCOFF test proves to be a good screening instrument in Primary Care.


Asunto(s)
Trastornos de Alimentación y de la Ingestión de Alimentos , Adolescente , Estudios Transversales , Trastornos de Alimentación y de la Ingestión de Alimentos/epidemiología , Femenino , Humanos , Masculino , Prevalencia , Atención Primaria de Salud , Encuestas y Cuestionarios
10.
Science ; 179(4077): 969-74, 1973 Mar 09.
Artículo en Inglés | MEDLINE | ID: mdl-17842155

RESUMEN

I propose a new scenario for the discovery of America. By analogy with other successful animal invasions, one may assume that the discovery of the New World triggered a human population explosion. The invading hunters attained their highest population density along a front that swept from Canada to the Gulf of Mexico in 350 years, and on to the tip of South America in roughly 1000 years. A sharp drop in human population soon followed as major prey animals declined to extinction. Possible values for the model include an average frontal depth of 160 kilometers, an average population density of 0.4 person per square kilometer on the front and of 0.04 person per square kilometer behind the front, and an average rate of frontal advance of 16 kilometers per year. For the first two centuries the maximum rate of growth may have equaled the historic maximum of 3.4 percent annually. During the episode of faunal extinctions, the population of North America need not have exceeded 600,000 people at any one time. The model generates a population sufficiently large to overkill a biomass of Pleistocene large animals averaging 9 metric tons per square kilometer (50 animal units per section) or 2.3 x 10(8) metric tons in the hemisphere. It requires that on the front one person in four destroy one animal unit (450 kilograms) per week, or 26 percent of the biomass of an average section in 1 year in any one region. Extinction would occur within a decade. There was insufficient time for the fauna to learn defensive behaviors, or for more than a few kill sites to be buried and preserved for the archeologist. Should the model survive future findings, it will mean that the extinction chronology of the Pleistocene megafauna can be used to map the spread of Homo sapiens throughout the New World.

11.
Science ; 186(4164): 638-40, 1974 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-17833721

RESUMEN

Organic remains, especially dung, of extinct ground sloths provide ideal material for radiocarbon dating. Rampart Cave, Arizona, revealed periodic occupation at intervals by the Shasta ground sloth from before 40,000 years ago until 11,000 years ago. Dates from other caves in the arid Southwest indicate that the Shasta ground sloth disappeared at very soon after the time of Clovis big game hunters. Ground sloth remains in South America are slightly younger. The timing of ground sloth extinction is in accord with the model of explosive overkill.

12.
Science ; 215(4528): 19-27, 1982 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-17790450

RESUMEN

Frugivory by extinct horses, gomphotheres, ground sloths, and other Pleistocene megafauna offers a key to understanding certain plant reproductive traits in Central American lowland forests. When over 15 genera of Central American large herbivores became extinct roughly 10,000 years ago, seed dispersal and subsequent distributions of many plant species were altered. Introduction of horses and cattle may have in part restored the local ranges of such trees as jicaro (Crescentia alata) and guanacaste (Enterolobium cyclocarpum) that had large mammals as dispersal agents. Plant distributions in neotropical forest and grassland mixes that are moderately and patchily browsed by free-ranging livestock may be more like those before megafaunal extinction than were those present at the time of Spanish conquest.

13.
Science ; 281(5375): 402-6, 1998 Jul 17.
Artículo en Inglés | MEDLINE | ID: mdl-9665881

RESUMEN

DNA from excrements can be amplified by means of the polymerase chain reaction. However, this has not been possible with ancient feces. Cross-links between reducing sugars and amino groups were shown to exist in a Pleistocene coprolite from Gypsum Cave, Nevada. A chemical agent, N-phenacylthiazolium bromide, that cleaves such cross-links made it possible to amplify DNA sequences. Analyses of these DNA sequences showed that the coprolite is derived from an extinct sloth, presumably the Shasta ground sloth Nothrotheriops shastensis. Plant DNA sequences from seven groups of plants were identified in the coprolite. The plant assemblage that formed part of the sloth's diet exists today at elevations about 800 meters higher than the cave.


Asunto(s)
ADN Mitocondrial/aislamiento & purificación , ADN de Plantas/aislamiento & purificación , ADN Ribosómico/aislamiento & purificación , Dieta , Heces/química , Fósiles , Perezosos , Animales , Secuencia de Bases , Clonación Molecular , ADN Mitocondrial/química , ADN de Plantas/química , ADN Ribosómico/química , Reacción de Maillard , Datos de Secuencia Molecular , Plantas/clasificación , Plantas/genética , Reacción en Cadena de la Polimerasa , ARN Ribosómico/genética , Ribulosa-Bifosfato Carboxilasa/genética , Perezosos/genética , Tiazoles
14.
Science ; 216(4541): 6, 1982 Apr 02.
Artículo en Inglés | MEDLINE | ID: mdl-17809771
15.
Science ; 191(4222): 102, 1976 Jan 09.
Artículo en Inglés | MEDLINE | ID: mdl-17834945
16.
Science ; 180(4089): 905-6, 1973 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-17735906
17.
SEMERGEN, Soc. Esp. Med. Rural Gen. (Ed. Impr.) ; 50(1): [e102086], ene.- feb. 2024.
Artículo en Español | IBECS (España) | ID: ibc-229440

RESUMEN

La regresión logística es un grupo de técnicas estadísticas que tienen como objetivo comprobar hipótesis o relaciones causales entre una variable dependiente categórica y otras variables independientes que pueden ser categóricas y cuantitativas. Mediante este modelo pretendemos estudiar la probabilidad de que ocurra el evento estudiado en función de unas variables que suponemos que son relevantes o influyentes. En este método es necesario detectar las variables modificadoras de efecto y las de confusión. Sus parámetros se estiman con el método de la máxima verosimilitud a través de un proceso con sucesivas iteraciones (AU)


Logistic regression is a group of statistical techniques that aim to test hypotheses or causal relationships between a categorical dependent variable and other independent variables that can be categorical and quantitative. Through this model we intend to study the probability that the event studied will occur based on some variables that we assume are relevant or influential. In this method it is necessary to detect effect modifier and confounding variables. Its parameters are estimated with the maximum likelihood method through a process with successive iterations (AU)


Asunto(s)
Humanos , Funciones de Verosimilitud , Modelos Logísticos
18.
SEMERGEN, Soc. Esp. Med. Rural Gen. (Ed. Impr.) ; 49(1): [e101821], ene.-feb. 2023. tab, graf
Artículo en Español | IBECS (España) | ID: ibc-215631

RESUMEN

La curva ROC es una herramienta estadística que se utiliza para evaluar la capacidad discriminativa de una prueba diagnóstica dicotómica. Se trata de curvas en las que se presenta la sensibilidad en función de los falsos positivos (complementario de la especificidad) para distintos puntos de corte. Son útiles para elegir el punto de corte más adecuado de una prueba, conocer el rendimiento global de esta y comparar la capacidad discriminativa de 2 o más pruebas diagnósticas. (AU)


The ROC curve is a statistical tool used to evaluate the discriminative capacity of a dichotomous diagnostic test. These are curves in which sensitivity is presented as a function of false positives (complementary to specificity) for different cut-off points. They are useful for choosing the most appropriate cut-off point for a test, knowing its overall performance and comparing the discriminative capacity of 2 or more diagnostic tests. (AU)


Asunto(s)
Humanos , Curva ROC , Sensibilidad y Especificidad , Valor Predictivo de las Pruebas , Análisis Discriminante , Técnicas y Procedimientos Diagnósticos
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