An observational study in Critical Illness, sponsored by Akdeniz University Hospital. Recruiting at 1 site in Turkey (Türkiye). Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-07-23.
Sponsored by Akdeniz University Hospital · Observational
Rapid sequence intubation (RSI) is the standard approach for emergency airway management in critically ill patients requiring endotracheal intubation. Laryngoscopy and tracheal intubation may provoke significant hemodynamic responses, including increases in heart rate and blood pressure, which may adversely affect patients with severe neurological or cardiovascular disease.
Although hemodynamic responses during tracheal intubation have been extensively investigated in the anesthesiology literature, evidence from emergency department settings remains limited. Furthermore, previous studies have rarely confirmed whether an adequate depth of anesthesia had been achieved before laryngoscopy, making interpretation of hemodynamic responses difficult.
The aim of this prospective observational study is to evaluate hemodynamic responses during rapid sequence intubation in adult emergency department patients after confirming adequate depth of anesthesia using bispectral index (BIS) monitoring. Heart rate and blood pressure will be recorded before induction, during intubation, and after successful endotracheal intubation, allowing objective assessment of the hemodynamic response under confirmed adequate anesthetic depth.
Rapid sequence intubation (RSI) is the standard approach for emergency airway management in critically ill patients requiring endotracheal intubation. Laryngoscopy and tracheal intubation may provoke significant hemodynamic responses, including increases in heart rate and blood pressure, which may adversely affect patients with severe neurological or cardiovascular disease.
Although hemodynamic responses during tracheal intubation have been extensively investigated in the anesthesiology literature, evidence from emergency department settings remains limited. Furthermore, previous studies have rarely confirmed whether an adequate depth of anesthesia had been achieved before laryngoscopy, making interpretation of hemodynamic responses difficult.
The aim of this prospective observational study is to evaluate hemodynamic responses during rapid sequence intubation in adult emergency department patients after confirming adequate depth of anesthesia using bispectral index (BIS) monitoring. Heart rate and blood pressure will be recorded before induction, during intubation, and after successful endotracheal intubation, allowing objective assessment of the hemodynamic response under confirmed adequate anesthetic depth.
1,780 studies on the registry are indexed under Critical Illness; 442 are open to participants now.
This study's planned enrollment of 200 is above the median of 140 across 814 observational studies indexed under Critical Illness.
Browse Critical Illness studies →Akdeniz University Hospital is the lead sponsor of 9 studies on the registry; 4 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Adult patients (≥18 years) requiring rapid sequence intubation (RSI) in the emergency department for airway management. All eligible patients underwent bispectral index (BIS) monitoring before laryngoscopy, and hemodynamic responses were evaluated after confirmation of adequate depth of anesthesia.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Adults aged 18 years or older. Patients undergoing rapid sequence intubation (RSI) in the emergency department.
Patients in whom bispectral index (BIS) monitoring can be applied before laryngoscopy.
Patients achieving an adequate depth of anesthesia (BIS 45-55) before laryngoscopy.
Written obtained from the patient or a legally authorized representative, when applicable according to local ethics requirements.
Exclusion Criteria:
Age \<18 years. Cardiac arrest before or during induction. Patients requiring immediate ("crash") intubation without sufficient time for BIS monitoring.
Inability to obtain reliable BIS monitoring (e.g., technical failure or inability to place the sensor).
Pregnancy. Facial or scalp conditions preventing BIS sensor placement. Prisoners or other vulnerable populations if excluded by the ethics protocol.
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Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Adult patients undergoing rapid sequence intubation in the emergency department. Bispectral index (BIS) monitoring is used to confirm adequate depth of anesthesia before laryngoscopy. Hemodynamic parameters are recorded before, during, and after endotracheal intubation.
Device: Bispectral Index (BIS) Monitoring
Bispectral index monitoring is used to assess the depth of anesthesia before laryngoscopy. Endotracheal intubation is performed after an adequate BIS value has been achieved.
Change in Diastolic Blood Pressure Following Rapid Sequence Intubation
Diastolic Blood pressure (MAP) measured before induction, immediately after endotracheal intubation, and at 5, 10, and 15 minutes after intubation in patients with BIS-confirmed adequate depth of anesthesia.
Time frame: Baseline, immediately after intubation, and 5, 10, and 15 minutes after intubation
Change in Systolic Blood Pressure Following Rapid Sequence Intubation
Systolic Blood pressure measured before induction, immediately after endotracheal intubation, and at 5, 10, and 15 minutes after intubation in patients with BIS-confirmed adequate depth of anesthesia.
Time frame: Baseline, immediately after intubation, and 5, 10, and 15 minutes after intubation
Change in Heart Rate Following Rapid Sequence Intubation
Heart Rate measured before induction, immediately after endotracheal intubation, and at 5, 10, and 15 minutes after intubation in patients with BIS-confirmed adequate depth of anesthesia.
Time frame: Baseline, immediately after intubation, and 5, 10, and 15 minutes after intubation
Plan to share: No
Started May 2026 (actual). Primary completion is estimated for May 2028, 24 months after the start.
Of 439 non-industry observational studies under Critical Illness, half reached primary completion within 23 months of starting (the median), counting those still running; a quarter within 12 and three quarters within 45. This study's planned 24 months is close to that.
Counting every sponsor, half of 442 studies reached it within 23 months; a quarter within 12 and three quarters within 46.
Critical Illness covers many different conditions, not one, so the studies compared here vary widely. Read these figures as a rough guide.
How these figures are worked out, and which studies are left out of them.
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Akdeniz University Hospital