About this trial
The best hypnotic choice to optimize the balance between good intubation condition quality and hemodynamic stability during RSI performed in the operating theatre remained to be investigated.
Therefore, a randomized study evaluating the efficacy of propofol, ketamine, and a combination of both is appropriate. So, we designed the HyPnotiKs randomized controlled study to investigate the efficacy of these hypnotic drugs in patients undergoing RSI in the operating theatre. The primary endpoint will be the successful tracheal intubation at the first attempt without major arterial hypotension event.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
age between 18 - 80 years' old
female* and male
≥ 1 risk factor of aspiration of gastric contents defined as
preoperative fasting period of less than 6 hours,
Disqualifiers
predicted impossible tracheal intubation (≥ 1 of the following criteria: patient with known intubation complications, Mallampati score IV, Thyromental Distance ≤ 4.0 cm, Mouth Opening < 3 cm, Sternomental Distance < 12.5 cm, significant modification of the airway due to congenital, cancer, trauma or burning lesions (non-exhaustive list)) [30]
preoperative arterial hypotension (MAP < 65 mmHg or under catecholamine)
preoperative respiratory distress syndrome (SpO2 < 90% in room air)
allergy to the active substance or to one of the excipients or to soy or peanuts,
Trial design
Parallel
Treatments tested in this trial
direct IV injection
Drugdirect IV injection at dosage of 2 mg/kg (adjusted body weight if BMI \> 30) after completing pre-oxygenation
combination of Ketamine and Propofol
Drugcombination of Ketamine and Propofol described above: consecutive direct IV injection of Ketamine 1 mg/kg and Propofol 1 mg/kg (adjusted body weight if BMI \> 30). Dilution are not necessary.
Treatment groups
Trial outcomes
Primary outcomes
proportion of patients with successful intubation at first attempt and without post-induction hypotension
The main objective of the study is to compare the efficacies of ketamine alone and ketamine-propofol combination compared to standard doses of propofol to achieve successful tracheal intubation on the first attempt without hemodynamic hypotension in patients at risk of aspiration of gastric contents in the operating room. The composite primary outcome is the proportion of patients with successful intubation at first attempt and without post-induction hypotension defined by a mean arterial pressure ≤ 60 mmHg within 10 minutes after the start of the hypnotic injection.
Secondary outcomes
rates of arterial hypotension episodes
rates of arterial hypotension episodes as defined in primary endpoint within 10 minutes after induction of anaesthesia compared between the three study groups
rates of tracheal intubation at the first attempt
rates of tracheal intubation at the first attempt compared between the three study groups
quality of the intubation
In the operating theatre (within 10 minutes after the start of the hypnotic injection): intubation difficulty scale (IDS-3) values
quality of the intubation
In the operating theatre (within 10 minutes after the start of the hypnotic injection): Cormack-Lehane score values (from 1 to 4) * Cormack 1: The glottis is seen in its entirety * Cormack 2: Only the posterior half of the glottis is seen * Cormack 3: Only a small part of the glottis is seen * Cormack 4: The glottis is hidden by the epiglottis and tongue.
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