Please select the eligibility criteria that correspond to the clinical trial below.
Title: Evaluation of Video Laryngoscopy (Video Macintosh-blade) and Direct Laryngoscopy (EMMA-Study): A Prospective, Randomized Trial
Brief Summary: A randomized controlled prospective study of laryngoscopy and intubation success comparing direct laryngoscopy and the McGrath® Mac videolaryngoscope.


Options:
A: Inclusion Criteria:

• Requiring orotracheal intubation

Exclusion Criteria:

* Contraindication to orotracheal intubation
* Time too short to allow inclusion and randomisation of patient (particularly cardiac arrest)
* Minor (\<18 )
* Pregnant, parturient , or breast-feeding woman
* Patient hospitalized without consent and/or deprived of liberty by court's decision
* Patient under guardianship or curators
* Lack of social insurance
* Lack of informed consent
* Concomitant inclusion in a trial whose primary endpoint focuses on intubation procedure
B: Inclusion Criteria:

* Age ≥ 18 Years No concurrent participation in another study
* capacity to consent
* Present written informed consent of the research participant
* Elective surgery under general anesthesia

Exclusion Criteria:

* Age \<18 years
* Existing pregnancy
* Lack of consent
* inability to consent
* emergency patients
* Emergency situations in the context of a Difficult Airway Management
* ASA classification\> 3
* situations where the possibility of accumulated gastric contents
* Participation in another study
C: Inclusion Criteria:

* Patients requiring general anesthesia for orthopedic surgery

Exclusion Criteria:

* known or expected difficult airway
* undergoing urgent or emergent surgery
* non-fasted
* American Society of Anesthesiology Class (ASA) IV-VI
* no consent for participation
D: Inclusion Criteria:

* ASA status I or II
* Mallampati class I or II
* Patients \> 18 years old
* Elective general, gynecological, neurological, orthopedic, plastic or urological surgery under general anesthesia
* Type of surgery that usually necessitate endotracheal intubation and controlled ventilation

Non-inlusion Criteria:

* Patient refusal
* History of psychiatric diseases or psychological problems (including mental retardation); inability to give consent; language barrier.
* Anticipated difficult airway (Mallampati class III and IV, thyromental distance \< 6 cm, mouth opening \< 3 cm, neck extension \<80° and neck flexion \<35°, inability to prognath, meaning bringing lower mandibular before the upper maxilla)
* Patient with history of neck rigidity or instability
* BMI \> 30
* Patient with beard (because of recognized risk for difficult ventilation)
* Patient with history of oropharyngeal or tracheal surgery (excluding adenoidectomy, amygdalectomy and teeth removal)
* Severe coronary artery disease
* Serious cardiac arrhythmias (including atrial fibrillation)
* Use of β-blockers (all types)
* History of opioid or illicit drug substance abuse
* Chronic use of psychotropic and/or opioid drugs
* Allergy to remifentanil or propofol
* Pregnancy
* Contraindications to mask ventilation (GI tract obstruction, pregnancy, active GERD, non-fasting patients)
* Difficult mask ventilation (before randomization at the first laryngoscopy)

Exclusion Criteria:

* Unexpected difficult airway requesting excessive, possibly painful airway manipulations
* Requiring hemodynamic support with vasopressors or inotropes 5 minutes before first laryngoscopy to 3 minutes after insertion of ETT

Answer: B