Protocol and Statistical Analysis Plan for the Randomized Trial of Sedative Choice for Intubation (RSI)

Emergency tracheal intubation is a common and high-risk procedure. Ketamine and etomidate are sedative medicines commonly used to induce anesthesia for emergency tracheal intubation, but whether the induction medication used affects patient outcomes is uncertain.

Does the use of ketamine for induction of anesthesia decrease the incidence of death among adults undergoing emergency tracheal intubation, compared to the use of etomidate?

The Randomized trial of Sedative choice for Intubation (RSI) is a pragmatic, multicenter, unblinded, parallel-group, randomized trial being conducted in 14 sites (6 emergency departments and 8 intensive care units) in the United States. The trial compares ketamine vs etomidate for induction of anesthesia among 2,364 critically ill adults undergoing emergency tracheal intubation. The primary outcome is all-cause, 28-day in-hospital mortality. The secondary outcome is the incidence of cardiovascular collapse during intubation, a composite of hypotension, receipt of vasopressors, and cardiac arrest. Enrollment began on April 6, 2022, and is expected to conclude in 2025.

The RSI trial will provide important data on the effects of ketamine vs etomidate on death and other outcomes for critically ill adults undergoing emergency tracheal intubation. Specifying the protocol and statistical analysis plan before the conclusion of enrollment increases the rigor, reproducibility, and interpretability of the trial.

ClinicalTrials.gov ; No.: NCT05277896 ; URL: www.clinicaltrials.gov.

Study Question: Does use of ketamine for induction of anesthesia during emergency tracheal intubation decrease the incidence of death, compared with use of etomidate?Results: This manuscript describes the protocol and statistical analysis plan for the Randomized trial of Sedative choice for Intubation (RSI) comparing ketamine vs etomidate for induction of anesthesia for emergency tracheal intubation.Interpretation: Prespecifying the full statistical analysis plan before completion of enrollment increases rigor, reproducibility, and transparency of the trial results.