Have there been changes in the application of mechanical ventilation in relation to scientific evidence? A multicenter observational study in Mexico

Translated title of the contribution: Have there been changes in the application of mechanical ventilation in relation to scientific evidence? A multicenter observational study in Mexico

Investigadores en el primer estudio (1998), Investigadores en el segundo estudio (2004), Investigadores en el tercer estudio (2010), Investigadores en el cuarto estudio (2016)

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: The main study objectives were to describe the practice of mechanical ventilation over an 18-year period in Mexico, and estimate changes in mortality among critical patients subjected to invasive mechanical ventilation (IMV). Design: A retrospective subanalysis of a prospective observational study conducted in 1998, 2004, 2010 and 2016 was carried out. Setting: Intensive Care Units (ICUs) in Mexico. Participants: Adult patients consecutively enrolled in the ICU during one month and who underwent IMV for more than 12 hours or noninvasive mechanical ventilation for more than one hour. Follow-up was performed up to a maximum of 28 days after inclusion. Interventions: None. Principal variables of interest: Age, sex, severity upon admission as estimated by SAPS II, parameters of daily arterial blood gases, treatment and complication variables, date and status at discharge from the ICU and from hospital. Results: A total of 959 patients were included in 81 ICUs. Tidal volume (vt) decreased significantly both in patients with acute respiratory distress syndrome (ARDS) criteria (estimated 8.5 ml/kg b.w. in 1998 to 6 ml/kg in 2016; P<0.001) and in patients without ARDS (estimated 9 ml/kg b.w. in 1998 to 6 ml/kg in 2016; P<0.001). The ventilatory protective strategy (defined as vt < 6 ml/kg or < 8 ml/kg and a plateau pressure < 30 cmH2O) was: 19% in 1998, 44% in 2004, 58% in 2010 and 75% in 2016 (P<0.001). The adjusted mortality rate in ICU over the 4 periods was: in 2004, odds ratio (OR) 1.05 (95% confidence interval, 95%CI: 0.73-1.72; P=0.764); in 2010, OR 1.68 (95%CI: 1.13-2.48; P=0.009); in 2016, OR 0.85 (95%CI: 0.60-1.20; P=0.368). Conclusions: The clinical practice of IMV in Mexican ICUs has been modified over a period of 18 years. The most significant change is the ventilatory strategy based on low vt. These changes have not been associated with significant changes in mortality.

Translated title of the contributionHave there been changes in the application of mechanical ventilation in relation to scientific evidence? A multicenter observational study in Mexico
Original languageEnglish
Pages (from-to)333-343
Number of pages11
JournalMedicina Intensiva
Volume44
Issue number6
DOIs
StatePublished - 1 Aug 2020

Keywords

  • Invasive mechanical ventilation
  • Mortality
  • Outcomes

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