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Updated: May 6, 2026

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
Published on: January 29, 2011
[Response to comment on the article "Incidence and factors associated with delirium in an Emergency Department"]
Jorge Ayón-Aguilar1, Laura Serrano-Vértiz2, Fernando Vladimir Quiroz-Lara3
1Instituto Mexicano del Seguro Social, Órgano de Operación Administrativa Desconcentrada Puebla, Coordinación Auxiliar Médica de Investigación en Salud. Puebla, Puebla, México.
Abstract:
Changes in cognition, attention, consciousness, and perception rapidly occurring and unpredictably evolving are the distinctive hallmarks of delirium syndrome. In Mexico the incidence is reported to be 12%. In our study, subject of the quoted letter to the editor, there were included 169 patients over 65 years of age, to which the Confusion Assessment Method (CAM) questionnaire was administered upon admission to the Emergency Department and 24 hours after admission to confirm or exclude a diagnosis of delirium. An incidence of 43.8% was reported, with no statistically significant association found with patient factors (such as infection, substance abuse, or comorbidities).
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