An observational study in Difficult Laryngoscopy, sponsored by Yedikule Training and Research Hospital. Completed at 1 site in Turkey. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-01-15.
Sponsored by Yedikule Training and Research Hospital · Observational
Demographic features and eight diagnostic variables were evaluated for difficult laryngoscopy (DL) predictivity. These were retrognathia, presence of buck teeth, modified Mallampati test (MMT), upper lip bite test (ULBT), sternomental distance (SMD), interincisor distance (IID), thyromental distance, and neck circumference. DL was identified by Grade III-IV view during laryngoscopy according to the Cormack-Lehane (CL) classification.
Creating a regression model among selected bedside tests for predicting difficult laryngoscopy )defined as Grade III or IV view during laryngoscopy according to Cormack-Lehane classification) is the primary objective. Recruiting of 145 ASA I-II adult patients who would have an elective surgery under general anesthesia were planned.
Criteria for exclusion were: a history of craniofacial surgery or restriction of cervical mobility, edentulous patients, pregnant women, patients who did not have a proper mouth opening (\< 3 cm), and those who might require awake intubation or rapid sequence induction, cancellation of the surgery or change in the anesthetic strategy.
The selected tests and clinical situations were:
The presence of retrognathia (reduced temporomandibular joint-incisor distance) Buck teeth Modified Mallampati test (MMT) in the sitting position without phonation. A scale ranging between 1 and 4 points is used and scores of 3 or 4 are considered as predictors of DL. Upper lip bite test (ULBT) performed in a neutral position. ULBT is graded as 1-3 according to the extension ability of lower incisors.
Sternomental distance - The distance between the mentum and upper border of the manubrium sterni when the head is fully extended and the mouth is closed.
Thyromental distance (TMD) - The distance between mentum and the thyroid notch when the head is fully extended.
Interincisor distance (IID) - The distance between upper and lower incisors when the mouth is fully opened.
Neck circumference (NC) - It was measured at the level of the cricoid cartilage, perpendicular to the cervical axis.
The patients are premedicated with 0.03 mg/kg and oxygenated with the help of a bag-mask. Anesthesia is induced by consequent administration of 2 mcg/kg fentanyl, 1 mg/kg lidocaine, 2 mg/kg propofol, and 0.7 mg/kg rocuronium bromide thereafter. Two minutes after induction, the laryngoscopy is performed
Yedikule Training and Research Hospital is the lead sponsor of 2 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Consecutive patients attending the anesthesiology out-patient clinic for preoperative evaluation in Kanuni Sultan Suleyman Ed. ad Research Hospital. The planned anesthetic method should be general anesthesia.
Exclusion Criteria:
Grade III or IV laryngeal view according to Cormack-Lehane classification
Diagnostic Test: Laryngoscopy
Grade I or II laryngeal view according to Cormack-Lehane classification
Diagnostic Test: Laryngoscopy
The laryngoscopy is performed with the help of an appropriate size Macintosh blade. The patient's head is held in the sniffing position. External manipulation is not used for improving the view in this investigation.
Difficult laryngoscopy
Grade III or IV laryngeal view before endotracheal intubation
Time frame: Up to two weeks after preoperative examination
Plan to share: No
This study is completed, as verified in Jan 2021. You cannot join it, but the record below documents what was studied.
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Yedikule Training and Research Hospital